Consulta: subjectFacets:"Antimicrobial activity"
Registros recuperados: 104
Data/hora: 05/06/2024 17:57:48

Novel antimicrobial activity of a dichloromethane extract obtained from red seaweed Ceramium rubrum (Hudson) (Rhodophyta: Florideophyceae) against Yersinia ruckeri and Saprolegnia parasitica, agents that cause diseases in salmonids
Provedor de dados: 69
Autores: Cortés,Yurima; Hormazábal,Emilio; Leal,Hellmuth; Urzúa,Alejandro; Mutis,Ana; Parra,Leonardo; Quiroz,Andrés.
Background Enteric red mouth disease and Saprolegniasis, which are caused by the bacteria Yersinia ruckeri and the oomycete Saprolegnia parasitica, respectively, are important illnesses that affect salmonid farming. Sanitary problems in farms are addressed by the prevention of disease outbreaks or by the treatment of diseases with chemicals. Environmental and governmental restrictions, toxicity and high treatment costs limit the use of drugs. Marine organisms, such as algae, sponges and corals, have developed an antimicrobial defense strategy based on the production of bioactive metabolites. Among these organisms, seaweeds offer a particularly rich source of potential new drugs. Hence, many pharmacologically active substances have been isolated from...
Tipo: Journal article
Palavras-chave: Antimicrobial activity; Bacteria; Fish pathogens; Lipophilic extract.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582014000300004

Diversity and biological activities of the bacterial community associated with the marine sponge Phorbas tenacior (Porifera, Demospongiae)
Provedor de dados: 5
Autores: Dupont, S.; Carre-mlouka, A.; Descarrega, F.; Ereskovsky, A.; Longeon, A.; Mouray, E.; Florent, I.; Bourguet-kondracki, M. L.
The diversity of the cultivable microbiota of the marine sponge Phorbas tenacior frequently found in the Mediterranean Sea was investigated, and its potential as a source of antimicrobial, antioxidant and antiplasmodial compounds was evaluated. The cultivable bacterial community was studied by isolation, cultivation and 16S rRNA gene sequencing. Twenty-three bacterial strains were isolated and identified in the Proteobacteria ( or classes) and Actinobacteria phyla. Furthermore, three different bacterial morphotypes localized extracellularly within the sponge tissues were revealed by microscopic observations. Bacterial strains were assigned to seven different genera, namely Vibrio, Photobacterium, Shewanella, Pseudomonas, Ruegeria, Pseudovibrio and...
Tipo: Text
Palavras-chave: Antimicrobial activity; Antioxidant activity; Antiplasmodial activity; Associated bacteria; Phorbas tenacior; Phylogenetic diversity; RAPD; Sponge.
Ano: 2014
URL: https://archimer.ifremer.fr/doc/00372/48276/48535.pdf

New Antimalarial and Antimicrobial Tryptamine Derivatives from the Marine Sponge Fascaplysinopsis reticulata
Provedor de dados: 5
Autores: Campos, Pierre-eric; Pichon, Emmanuel; Moriou, Céline; Clerc, Patricia; Trépos, Rozenn; Frederich, Michel; De Voogd, Nicole; Hellio, Claire; Gauvin-bialecki, Anne; Al-mourabit, Ali.
Chemical study of the CH2Cl2-MeOH (1:1) extract of the sponge Fascaplysinopsis reticulata collected in Mayotte highlighted three new tryptophan derived alkaloids, 6,6′-bis-(debromo)-gelliusine F (1), 6-bromo-8,1′-dihydro-isoplysin A (2) and 5,6-dibromo-8,1′-dihydro-isoplysin A (3), along with the synthetically known 8-oxo-tryptamine (4) and the three known molecules from the same family, tryptamine (5), (E)-6-bromo-2′-demethyl-3′-N-methylaplysinopsin (6) and (Z)-6-bromo-2′-demethyl-3′-N-methylaplysinopsin (7). Their structures were elucidated by 1D and 2D NMR spectra and HRESIMS data. All compounds were evaluated for their antimicrobial and their antiplasmodial activities. Regarding antimicrobial activities, the best compounds are (2) and (3), with minimum...
Tipo: Text
Palavras-chave: Fascaplysinopsis reticulata; Marine sponge; Tryptamine alkaloids; Antimalarial activity; Antimicrobial activity.
Ano: 2019
URL: https://archimer.ifremer.fr/doc/00485/59664/62722.pdf

Massive Gene Expansion and Sequence Diversification Is Associated with Diverse Tissue Distribution, Regulation and Antimicrobial Properties of Anti-Lipopolysaccharide Factors in Shrimp
Provedor de dados: 5
Autores: Matos, Gabriel Machado; Schmitt, Paulina; Barreto, Caire; Farias, Natanael Dantas; Toledo-silva, Guilherme; Guzman, Fanny; Destoumieux Garzon, Delphine; Perazzolo, Luciane Maria; Rosa, Rafael Diego.
Anti-lipopolysaccharide factors (ALFs) are antimicrobial peptides with a central β-hairpin structure able to bind to microbial components. Mining sequence databases for ALFs allowed us to show the remarkable diversity of ALF sequences in shrimp. We found at least seven members of the ALF family (Groups A to G), including two novel Groups (F and G), all of which are encoded by different loci with conserved gene organization. Phylogenetic analyses revealed that gene expansion and subsequent diversification of the ALF family occurred in crustaceans before shrimp speciation occurred. The transcriptional profile of ALFs was compared in terms of tissue distribution, response to two pathogens and during shrimp development in Litopenaeus vannamei, the most...
Tipo: Text
Palavras-chave: Host defense peptide; Antimicrobial peptide; Anti-LPS factor; Hostmicrobe relationship; Functional diversity; Invertebrate immunity; Crustacean; Antimicrobial activity.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00464/57523/59711.pdf

Lactic acid bacteria selection for biopreservation as a part of hurdle technology approach applied on seafood
Provedor de dados: 5
Autores: Wiernasz, Norman; Cornet, Josiane; Cardinal, Mireille; Pilet, Marie-france; Passerini, Delphine; Leroi, Francoise.
As fragile food commodities, microbial and organoleptic qualities of fishery and seafood can quickly deteriorate. In this context, microbial quality and security improvement during the whole food processing chain (from catch to plate), using hurdle technology, a combination of mild preserving technologies such as biopreservation, modified atmosphere packaging and superchilling, are of great interest. Thirty-five lactic acid bacteria (LAB) belonging to the species Carnobacterium maltaromaticum, Carnobacterium inhibens, Lactococcus piscium, Leuconostoc gelidum, Vagococcus fluvialis, Vagococcus penaei and Aerococcus viridans, known to possess interesting antimicrobial activity, were chosen for their potential application as bioprotective agents as a part of...
Tipo: Text
Palavras-chave: Antimicrobial activity; Spoilage; Screening; Chitosan; Fish juice; Safety assessment.
Ano: 2017
URL: https://archimer.ifremer.fr/doc/00382/49342/49732.pdf

New Insight into Antimicrobial Compounds from Food and Marine-Sourced Carnobacterium Species through Phenotype and Genome Analyses
Provedor de dados: 5
Autores: Begrem, Simon; Ivaniuk, Flora; Gigout Chevalier, Frederique; Kolypczuk, Laetitia; Bonnetot, Sandrine; Leroi, Francoise; Grovel, Olivier; Delbarre-ladrat, Christine; Passerini, Delphine.
Carnobacterium maltaromaticum and Carnobacterium divergens, isolated from food products, are lactic acid bacteria known to produce active and efficient bacteriocins. Other species, particularly those originating from marine sources, are less studied. The aim of the study is to select promising strains with antimicrobial potential by combining genomic and phenotypic approaches on large datasets comprising 12 Carnobacterium species. The biosynthetic gene cluster (BGCs) diversity of 39 publicly available Carnobacterium spp. genomes revealed 67 BGCs, distributed according to the species and ecological niches. From zero to six BGCs were predicted per strain and classified into four classes: terpene, NRPS (non-ribosomal peptide synthetase), NRPS-PKS (hybrid...
Tipo: Text
Palavras-chave: Lactic acid bacteria; Antimicrobial activity; Carnobacteriumspp; Hydrogen peroxide; Bacteriocin; RiPP; NRPS; Terpene; Natural product; Genome mining.
Ano: 2020
URL: https://archimer.ifremer.fr/doc/00641/75335/75999.pdf

Composition and antimicrobial activity of essential oils of Cinnamosma fragrans
Provedor de dados: 5
Autores: Randrianarivelo, Roger; Sarter, Sarnira; Odoux, Eric; Brat, Pierre; Lebrun, Marc; Romestand, Bernard; Menut, Chantal; Andrianoelisoa, Hanitriniaina Sahondra; Raherimandimby, Marson; Danthu, Pascal.
Essential oil samples of Cinnamosma fragrans from two regions in Madagascar, Tsaramandroso (38 samples) and Mariarano (30 samples), were analysed by GC/MS. Fifty-seven components were identified, accounting from 88.3% to 99.4% of the oils' composition. The major components were linalool (72.5 +/- 23.3%) in Tsaramandroso and 1,8-cineole (47.3 +/- 10.2%) in Mariarano. Samples B8 (95.8% linalool) from Tsaramandroso and B143 (71.6% 1,8-cineole) from Mariarano containing the highest proportions of the two main components identified, were selected to determine antimicrobial activities against 10 microbial strains. Bacillus subtilis and Staphylococcus aureus were the most sensitive strains to both oils. Minimum inhibitory concentration (MIC) values were lower for...
Tipo: Text
Palavras-chave: Madagascar; 1.8 Cineole; Linalool; Antimicrobial activity; Essential oil; Cinnamosma fragrans.
Ano: 2009
URL: http://archimer.ifremer.fr/doc/2009/publication-6242.pdf

Seasonal effect of brazilian propolis on Candida albicans and Candida tropicalis
Provedor de dados: 79
Autores: SFORCIN,J. M.; FERNANDES JÚNIOR,A.; LOPES,C. A. M.; FUNARI,S. R. C.; BANKOVA,V.
Recently, propolis has been attracting the attention of researchers due to various biological activities and therapeutic properties. In Brazil, propolis is produced all year long, so there may be some seasonal variations. This work was carried out in order to compare propolis collected during the four seasons by its in vitro antimicrobial activity on yeast pathogens isolated from human infections. Propolis was produced by africanized honeybees in Botucatu, São Paulo State, collected throughout a year and pooled by season. Hydroalcoholic solutions of propolis were prepared with each pool and diluted in agar, using serial concentrations of propolis from each pool. A determination of minimal inhibitory concentration (MIC) was performed. The results show that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Propolis; Season; Candida; Antimicrobial activity.
Ano: 2001
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79302001000100009

IN VITRO ACTIVITY OF PROPOLIS AGAINST BACTERIAL AND  YEAST PATHOGENS ISOLATED FROM HUMAN INFECTIONS
Provedor de dados: 79
Autores: FERNANDES Jr.,A.; SUGIZAKI,M.F.; FOGO,M.L.; FUNARI,S.R.C.; LOPES,C.A.M.
The in vitro activity of propolis against 118 Staphylococcus aureus, 108 Escherichia coli, 60 Salmonella typhimurium, 50 Candida albicans, 23 Candida parapsilosis, 19 Candida tropicalis and 14 Candida guilliermondii isolated from human infections was studied by the agar dilution method. Among the bacteria, the Gram-negative were the least susceptible organisms showing minimal inhibitory concentration (MIC) for 90% of the strains tested ranging from 22.5 mg/ml - 10,2% V/V to 23.1 mg/ml - 10.5% V/V. The MIC's for Candida ranged from 0.80 mg/ml to &amp;gt; 11 mg/ml (0.40% V/V to &amp;gt; 5.0% V/V), the strains of C. parapsilosis being the least susceptible. The relative order of susceptibility among all isolates, was: S.aureus &amp;gt; C. tropicalis &amp;gt;...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Propolis; Antimicrobial activity; Bacteria; Yeast pathogens; Candida sp.
Ano: 1995
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0104-79301995000200003

Characterization of Leiurus abdullahbayrami (Scorpiones: Buthidae) venom: peptide profile, cytotoxicity and antimicrobial activity
Provedor de dados: 80
Autores: Erdeş,Efe; Doğan,Tuğba Somay; Coşar,İlhan; Danışman,Tarık; Kunt,Kadir Boğaç; Şeker,Tamay; Yücel,Meral; Özen,Can.
Background Scorpion venoms are rich bioactive peptide libraries that offer promising molecules that may lead to the discovery and development of new drugs.Leiurus abdullahbayrami produces one of the most potent venoms among Turkish scorpions that provokes severe symptoms in envenomated victims.Methods In the present study, the peptide profile of the venom was investigated by electrophoretic methods, size-exclusion and reversed-phase chromatography and mass spectroscopy. Cytotoxic and antimicrobial effects were evaluated on a breast cancer cell line (MCF-7) and various bacterial and fungal species.Results Proteins make up approximately half of the dry weight of L. abdullahbayrami crude venom. Microfluidic capillary electrophoresis indicated the presence of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Scorpion venom; Toxin; Peptide; Leiurus abdullahbayrami; Microfluidic capillary; Electrophoresis; Peptidomics; Venomics; Cytotoxicity; Antimicrobial activity; Turkey.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992014000200338

In vitroantibacterial effect of wasp (Vespa orientalis) venom
Provedor de dados: 80
Autores: Jalaei,Jafar; Fazeli,Mehdi; Rajaian,Hamid; Shekarforoush,Seyed Shahram.
Background The emergence of antibacterial resistance against several classes of antibiotics is an inevitable consequence of drug overuse. As antimicrobial resistance spreads throughout the globe, new substances will always be necessary to fight against multidrug-resistant microorganisms. Venoms of many animals have recently gained attention in the search for new antimicrobials to treat infectious diseases. Thefore, the present study aimed to study the antibacterial effects of wasp (Vespa orientalis) crude venom. Two gram-positive bacteria (Staphylococcus aureus and Bacillus subtilis) and two gram-negative ones (Escherichia coli and Klesiella pneumonia) were compared for their sensitivity to the venom by determining the inhibition zone (Kirby-Bauer method)...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Wasp venom; Vespa orientalis; Antimicrobial activity; Minimum inhibitory concentration.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992014000200329

Antibacterial activity of venom from funnel web spider Agelena labyrinthica (Araneae: Agelenidae)
Provedor de dados: 80
Autores: Benli,M; Yigit,N.
Since the number of microorganisms that are resistant to antibiotics has been increasing steadily, the need for combating these pathogens requires new pharmaceutical agents. To produce these substances, new models have been developed in recent decades. In our study, the venom of Agelena labyrinthica (Clerck, 1757) (Araneae: Agelenidae) was tested against ten bacterial strains, specifically, testing 1/100, 1/10 and 1/1 fractions of diluted venom against these bacteria. While the 1/100 dilution was successful in only one of ten bacterial strains, the 1/10 and the 1/1 were effective on six of ten bacterial strains. The most effective results, among these three different concentrations, were observed on Bacillus subtilis. The other five strains that were also...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agelena labyrinthica; Venom; Antimicrobial activity.
Ano: 2008
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992008000400007

Antimicrobial activity of an L-amino acid oxidase isolated from Bothrops leucurus snake venom
Provedor de dados: 80
Autores: Torres,AFC; Dantas,RT; Menezes,RRPPB; Toyama,MH; Filho,ED; Oliveira,MF; Nogueira,NAP; Oliveira,MR; Monteiro,HSA; Martins,AMC.
Some snake venom proteins present enzymatic activities, such as L-amino acid oxidase (LAAO). The aim of this paper was to investigate the effect of Bothrops leucurus total venom (BleuTV) and its fraction LAAO (BleuLAAO) on bacteria, yeast, and promastigote forms of Leishmania amazonensis and Leishmania chagasi, and epimastigote forms of Trypanosoma cruzi. BleuTV was isolated with a Protein Pack 5PW® (Waters Corporation, USA), and several fractions were obtained. BleuLAAO was purified to high molecular homogeneity, and its N-terminal amino acid sequence shared a high degree of amino acid conservation with other LAAOs. BleuTV inhibited Staphylococcus aureus growth in a dose-dependent manner, with a minimum inhibitory concentration (MIC) of 25 μg/mL, which...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: L-amino oxidase; Bothrops leucurus; Antimicrobial activity.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992010000400012

Crotacetin, a novel snake venom C-type lectin, is homolog of convulxin
Provedor de dados: 80
Autores: Rádis-Baptista,G.; Moreno,F. B. M. B.; Nogueira,L. L.; Martins,A. M. C.; Toyama,D. O.; Toyama,M. H.; Azevedo Jr,W. F.; Cavada,B. S.; Yamane,T.
Snake venom (sv) C-type lectins encompass a group of hemorrhagic toxins, which are able to interfere with hemostasis. They share significant similarity in their primary structures with C-type lectins of other animals, and also present a conserved carbohydrate recognition domain (CRD). A very well studied sv C-type lectin is the heterodimeric toxin, convulxin (CVX), from the venoms of South American rattlesnakes, Crotalus durissus terrificus and C. d. cascavella. It consists of two subunits, alfa (CVXalpha , 13.9 kDa) and beta (CVXbeta , 12.6 kDa), joined by inter and intra-chain disulfide bounds, and is arranged in a tetrameric alpha4beta4 conformation. Convulxin is able to activate platelet and induce their aggregation by acting via p62/GPVI collagen...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crotalus durisssus venom; Snake venom C-type lectin; Homology modeling; Platelet aggregation; Antimicrobial activity.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992005000400013

Biological properties of medicinal plants: a review of their antimicrobial activity
Provedor de dados: 80
Autores: Silva,NCC; Fernandes Júnior,A.
Plants have been used for thousands of years to flavor and conserve food, to treat health disorders and to prevent diseases including epidemics. The knowledge of their healing properties has been transmitted over the centuries within and among human communities. Active compounds produced during secondary vegetal metabolism are usually responsible for the biological properties of some plant species used throughout the globe for various purposes, including treatment of infectious diseases. Currently, data on the antimicrobial activity of numerous plants, so far considered empirical, have been scientifically confirmed, concomitantly with the increasing number of reports on pathogenic microorganisms resistant to antimicrobials. Products derived from plants may...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Medicinal plants; Phytochemistry; Antimicrobial activity; Plant extracts; Essential oils; Synergism.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992010000300006

Biochemical and pharmacological study of venom of the wolf spider Lycosa singoriensis
Provedor de dados: 80
Autores: Liu,ZH; Qian,W; Li,J; Zhang,Y; Liang,S.
The wolf spider Lycosa singoriensis is a large and venomous spider distributed throughout northwestern China. Like other spider venoms, the wolf spider venom is a chemical cocktail. Its protein content is 0.659 mg protein/mg crude venom as determined by the Lowry method. MALDI-TOF analysis revealed that the venom peptides are highly diverse and may be divided into three groups characterized by three independent molecular ranges: 2,000 to 2,500 Da, 4,800 to 5,500 Da and 7,000 to 8,000 Da, respectively. This molecular distribution differs substantially from those of most spider venoms studied so far. This wolf spider venom has low neurotoxic action on mice, but it can induce hemolysis of human erythrocytes. Furthermore, the venom shows antimicrobial activity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Spider; Lycosa singoriensis; Crude venom; MALDI-TOF; Antimicrobial activity.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992009000100008

Antibacterial activity of Falkenbergia hillebrandii (Born) from the Indian coast against human pathogens
Provedor de dados: 85
Autores: Manilal,A; Sujith,S; Selvin,J; Shakir,C; Seghal Kiran,G.
The antibacterial property of the red algae, Falkenbergia hillebrandii (Born) collected from the southwest coast of India (Indian Ocean) was evaluated against three multidrug resistant human pathogens. Four different solvents: ethyl acetate, dichloromethane, methanol and phosphate buffer saline (PBS) were used with this purpose. Dried samples extracted with methanol showed broadest and highest antimicrobial activity when compared to other solvents. However, PBS extract showed no antibacterial activity. The highly active compounds red alga, F. hillebrandii were fractionated and purified using different chromatographic systems, including reverse phase HPLC and GCMS. The analysis revealed that the most abundant metabolite was the oleic acid (51.33%) followed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; F. hillebrandii; Multidrug resistant human pathogens; Methanolic extract; Bioactive compounds.
Ano: 2009
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572009000200013

Botanical study, phytochemistry and antimicrobial activity of Tabebuia aurea: (with 1 table &amp;#38; 1 figure)
Provedor de dados: 85
Autores: Barbosa-Filho,José Maria; Sampaio A Lima,Cláudia; Camorim,Elba Lúcia; de Sena,Kêsia Xisto FR; Almeida,Jackson Roberto GS; Vasconcelos L da-Cunha,Emídio; Silva,Marcelo S; Agra,Maria de Fátima; Braz-Filho,Raimundo.
We report morphodiagnosis, and phytochemical and antimicrobial investigations of Tabebuia aurea. It was noted that the leaves are compostas with anomocytic stomata only on the lower side; the vascular system is concentric andthe mesophyll arrangement is dorsiventral. From the stem bark eight compounds were isolated, including: lapachol, 3,4',5-trihydroxy-7-methoxyflavone, b-sitosterol, betulinic acid, p-anisic acid, veratric acid, methyl cinnamate and ethyl p-hydroxy-cinnamate. Antimicrobial assays showed growth inhibition the of Gram positive and Gram negative bacteria, alcohol-acid bacterium and fungi.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tabebuia aurea; Bignoniaceae; Pharmacobotany; Lapachol; Chemical constituents; Antimicrobial activity.
Ano: 2004
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572004000100027

Antibacterial efficacy of commercial disinfectants on dirt floor used in poultry breeder houses
Provedor de dados: 89
Autores: Pilotto,F; Rodrigues,LB; Santos,LR; Klein,WA; Colussi,FM; Nascimento,VP.
Dirt floors are used on most Brazilian poultry farms since the construction of concrete floors is very expensive. In vitro tests carried out to verify the effectiveness of disinfectants do not consider the adverse conditions found in poultry farms. Therefore, the present study aimed at evaluating the effect of six commercial disinfectants on the reduction of total and fecal coliforms on the dirt floor of breeder houses. The amount of disinfectant solution to be used per square meter was defined by counting total and fecal coliforms at different soil depths and by analyzing soil physical properties. Coliforms were detected at 0.5 cm, and one liter of disinfectant solution was sufficient for soil saturation at this depth. After that, the efficacy of six...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; Dirt floor; Disinfectants; Poultry breeder houses.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2007000200009

Effect of chitosan coating on contamination of fresh bovine meat sold in the open market
Provedor de dados: 124
Autores: Silva,Alessandra Santana; Sampaio,Adriana Pereira; Santos,Marly Silveira; Souza,Bartolomeu Warlene Silva de; Evangelista-Barreto,Norma Suely.
ABSTRACT This study aimed to evaluate the sanitary status of fresh bovine meat sold at the open market in Jiquiriça municipality, Brazil and validate the use of chitosan as an antimicrobial coating to control the bioburden. In total, we evaluated 30 samples of fresh beef for the presence of coagulase-positive staphylococci and Salmonella spp. Furthermore, stores selling fresh meat products were evaluated for compliance with sanitary regulations set by the Ministry of Health in Brazil. To evaluate the antimicrobial activity of chitosan two sets of meat samples were tested, the test group consisted of contaminated meat coated with 2% chitosan solution whereas the control group consisted of untreated contaminated meat. It was found that fresh bovine meat at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Salmonella; Staphylococcus; Internal meat temperature; Antimicrobial activity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902019000100038

Seasonal variability of the antimicrobial activity of the essential oil of Lippia alba
Provedor de dados: 124
Autores: Machado,Terezinha Feitosa; Pereira,Rita de Cássia Alves; Batista,Valéria Chaves Vasconcelos.
Lippia alba is a shrub of the Verbenaceae family, popularly known as lemon balm. It's essential oil is said to have broad-spectrum antimicrobial activity whose effectiveness varies according to its composition, which is influenced by both biotic and abiotic factors. The present study aimed to evaluate the antimicrobial effectiveness of oil taken from the leaves of L. alba collected at different times of the year, against microorganisms of importance in food. The oil, obtained by hydrodistillation, was tested against standard cultures of Pseudomonas aeruginosa, Salmonella choleraesuis, Escherichia coli, Staphylococcus aureus, Listeria monocytogenes and Listeria innocua using agar diffusion techniques. The different sampling times had a big influence on the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lippia alba; Antimicrobial activity; Seasonality.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902014000300011

Antimicrobial activity of natural products from Myracrodruon urundeuva Allemão (Aroeira-do-sertão)
Provedor de dados: 98
Autores: Lopes Gomes,Vangerlan Tiago; Pereira Chaves,Thiago; Batista Alencar,Laianne Carla; Coelho Dantas,Ivan; Dantas de Medeiros,Ana Cláudia; de Castro Felismino,Delcio.
Introduction: Myracrodruon urundeuva Allemão (Anacardiaceae) is a plant from the Brazilian semiarid region with medicinal properties against various diseases. Objective: to screen the phytochemistry and determine the antimicrobial activity of the hydroalcoholic extract from the bark of this plant. Methods: the extract was obtained by maceration and subjected to qualitative phytochemical tests and in vitro antimicrobial activity assays against gram-positive and gram-negative bacteria and fungi. Results: among the phytochemical compounds stood out tannins, flavonoids and alkaloids. The extract was effective against Staphylococcus aureus, Klebsiella pneumoniae and Enterococcus faecalis. Conclusions: Myracrodruon urundeuva presents compounds of high...
Tipo: Journal article
Palavras-chave: Medicinal plants; Myracrodruon urundeuva; Semiarid; Ethnopharmacology; Secondary metabolites; Antimicrobial activity.
Ano: 2013
URL: http://scielo.sld.cu/scielo.php?script=sci_arttext&pid=S1028-47962013000400004

Cinnabarin synthesis by Pycnoporus sanguineus strains and antimicrobial activity against bacteria from food products
Provedor de dados: 59
Autores: Smânia,Elza de Fátima Albino; Smânia Júnior,Artur; Loguercio-Leite,Clarice.
Among three strains of Pycnoporus sanguineus, MIP 89007 produced more cinnabarin than MIP 95001 and MIP 95002. The antimicrobial activity of cinnabarin was tested against 11 species of bacteria isolated from food. Bacillus cereus and Leuconostoc plantarum were the most sensitive to cinnabarin, being inhibited by 0.0625 mg/ml. Klebsiella pneumoniae was the least sensitive (&amp;gt;4.0 mg/ml).
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pycnoporus sanguineus; Cinnabarin; Antimicrobial activity; Fungus; Bacteria.
Ano: 1998
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37141998000400017

Metabolites from endophytic Aspergillus fumigatus and their in vitro effect against the causal agent of tuberculosis
Provedor de dados: 36
Autores: SILVA,Emily Marcele Soares; SILVA,Ingrid Reis da; OGUSKU,Mauricio Morishi; CARVALHO,Clarice Maia; MAKI,Cristina Sayuri; PROCÓPIO,Rudi Emerson de Lima.
ABSTRACT Tuberculosis (TB) remains one of the most deadly communicable infectious diseases, causing 1.4 million deaths in 2015 worldwide due to many conditions, including the inadequate treatment and the emergence of multidrug-resistant strains of the causal agent, Mycobacterium tuberculosis. Therefore, drugs developed from natural sources, as microorganisms and plant extracts, are a frequent target for the research and discovery of antimicrobial compounds. The current study started the characterization of compounds produced by an Aspergillus fumigatus isolated from copaíba (Copaifera multijuga) that efficiently inhibits M. tuberculosis by releasing the compounds into the fermentation broth under specific culture conditions. A preliminary assay was carried...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mycobacterium spp.; Antimicrobial activity; Copaíba; Chromatography.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672018000100063

In vitro activity of 2-pyridinecarboxylic acid against trypanosomes of the subgenus Schizotrypanum isolated from the bat Phyllostomus hastatus - doi: 10.4025/actascibiolsci.v33i4.6482
Provedor de dados: 3
Autores: Corrêa, Paulo Roberto Ceridório; UEL; Pinto, Artur da Silveira; UFMG; Silva, Grácia Divina de Fátima; UFMG; Vieira Filho, Sidney Augusto; UFOP; Duarte, Lucienir Pains; UFMG; Yamada-Ogatta, Sueli Fumie; UEL.
The effect of 2-pyridinecarboxylic acid (picolinic acid) on trypanosomes of the subgenus Schizotrypanum isolated from the bat Phyllostomus hastatus was determined in this study. Picolinic acid, at 50 &amp;micro;g mL-1, inhibited epimastigote growth by 99% after 12 days incubation. In addition, trypomastigote motility decreased by 50% after 6h and completely after 24h in the presence of 50 &amp;micro;g mL-1 picolinic acid. The 50% cytotoxic concentration on HEp-2 cell line was 275 &amp;micro;g mL-1 after 4 days incubation. Altogether, these results indicate higher toxicity against trypanosomes. The inhibitory effect of picolinic acid on epimastigote growth can be partially reversed by nicotinic acid and L-tryptophan, suggesting a competitive inhibition....
Palavras-chave: Ciências Biológicas; Microbiologia; 2.12.02.00-1 bat trypanosome; Schizotrypanum; 2-pyridinecarboxylic acid; Antimicrobial activity Atividade antimicrobiana bat trypanosome; Schizotrypanum; 2-pyridinecarboxylic acid; Antimicrobial activity.
Ano: 2011
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/6482

In vitro study on the antimicrobial effect of hydroalcoholic extracts from Mentha arvensis L. (Lamiaceae) against oral pathogens - doi: 10.4025/actascibiolsci.v34i4.8959
Provedor de dados: 3
Autores: Lund, Rafael Guerra; Universidade Federal de Pelotas; Serpa, Rosana; Universidade Federal de Pelotas; Nascente, Patrícia da Silva; Universidade Federal de Pelotas; Ribeiro, Gladis Aver; Universidade Federal de Pelotas; Freitag, Rogério Antonio; Universidade Federal de Pelotas; Del Pino, Francisco Augusto Burkert; Universidade Federal de Pelotas.
In vitro tests could be a valuable tool for the evaluation of medicinal plants’ antimicrobial activity. Mentha arvensis of the Lamiaceae family is one of the most frequently traditional plants used in Brazil. Hydroalcoholic extracts of M. arvensis were analyzed for antimicrobial activity on Streptococcus mutans, Streptococcus sobrinus and Candida albicans. Three different assays (agar diffusion, broth macro- and micro-dilution methods) were used to evaluate antimicrobial activity. Although hydroalcoholic extracts of M. arvensis did not show any antibacterial effect, its antifungal activity against C. albicans was revealed. According to the micro-dilution broth assay, MIC of the hydroalcoholic extract from leaves of M. arvensis on Candida albicans strains...
Palavras-chave: 2.12.00.00-9 Microbiologia Mentha arvensis; Antimicrobial activity; Streptococcus mutans; Candida albicans Microbiologia.
Ano: 2012
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/8959

Optimization of the pulsed electric field -assisted extraction of functional compounds from Nepeta binaludensis
Provedor de dados: 111
Autores: Azimi Mahalleh, Afsaneh; Sharayei, Parvin; Mortazavi, Seyed Ali; Azarpazhooh, Elham; Niazmand, Razieh.
Pulsed electric field (PEF) treatment was used for extracting effective components from Nepeta (Nepeta binaludensis Jamzad). A response surface method was used to investigate the effects of independent process variables (voltage of pulsed electric field (VPEF): 2, 4 and 6 KV/cm and number of pulsed electric field (NPEF): 20, 40 and 60 n) on the yield (Y) and antioxidant characteristics: total phenolic compounds (TPC), 1,1- diphenyl -2- picrylhydrazyl free radical scavenging (DPPHsc), ferric reducing-antioxidant power (FRAP), half  maximal of radical-scavenging activity (IC50) of Nepeta extract (aerial parts). According to Derringer’s desired function approach, the optimal conditions based on both individual and combinations of all process variables were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenolic compounds; Nepeta binaludensis; Response Surface Methodology; Pulsed electric field; Antimicrobial activity.
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5391

Optimization of the pulsed electric field -assisted extraction of functional compounds from Nepeta binaludensis
Provedor de dados: 111
Autores: Azimi Mahalleh, Afsaneh; Sharayei, Parvin; Mortazavi, Seyed Ali; Azarpazhooh, Elham; Niazmand, Razieh.
Pulsed electric field (PEF) treatment was used for extracting effective components from Nepeta (Nepeta binaludensis Jamzad). A response surface method was used to investigate the effects of independent process variables (voltage of pulsed electric field (VPEF): 2, 4 and 6 KV/cm and number of pulsed electric field (NPEF): 20, 40 and 60 n) on the yield (Y) and antioxidant characteristics: total phenolic compounds (TPC), 1,1- diphenyl -2- picrylhydrazyl free radical scavenging (DPPHsc), ferric reducing-antioxidant power (FRAP), half  maximal of radical-scavenging activity (IC50) of Nepeta extract (aerial parts). According to Derringer’s desired function approach, the optimal conditions based on both individual and combinations of all process variables were...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenolic compounds; Nepeta binaludensis; Response Surface Methodology; Pulsed electric field; Antimicrobial activity.
Ano: 2019
URL: http://www.cigrjournal.org/index.php/Ejounral/article/view/5391

Synthesis and antimicrobial activity of new amino derivatives of pyrano[4’’,3’’:4’,5’]pyrido[3’,2’:4,5]thieno[3,2-d]pyrimidine
Provedor de dados: 42
Autores: SIRAKANYAN,SAMVEL N.; GERONIKAKI,ATHINA; SPINELLI,DOMENICO; HAKOBYAN,ELMIRA K.; KARTSEV,VIKTOR G.; PETROU,ANTHI; HOVAKIMYAN,ANUSH A.
ABSTRACT Annulated thienopyrimidine derivatives attracted big interest of the scientific community due to their broad spectrum of biological activities among which are the inhibition of phosphodiesterase, antiproliferative and antimicrobial activities. As a continuation of our studies on the synthesis and biological activity of fused thieno[3,2-d]pyrimidine derivatives, the goal of this paper is the synthesis and study of the properties of compounds containing different heterocycles such as fused thieno[2,3-b]pyridine and tetrazolo[1,5-c]pyrimidine in the same molecule. Thus, starting from the ethyl 1-amino-5-isopropyl-8,8-dimethyl-8,9-dihydro-6H-pyrano[4,3-d]thieno[2,3-b]pyridine-2-carboxylate 1, efficient methods for obtaining new...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amino derivatives; Antimicrobial activity; Azide/tetrazole equilibrium; Nucleophilic substitution; Thieno[3; 2-d]pyrimidine.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000301043

Evaluating antimicrobial and antioxidant capacity of endemic Phlomis russeliana from Turkey and its antiproliferative effect on Human Caco-2 Cell Lines
Provedor de dados: 42
Autores: ALPAY,MERVE; DULGER,GORKEM; SAHIN,IBRAHIM E.; DULGER,BASARAN.
Abstract: In this study, the antimicrobial, antioxidant and antitumor activity of ethanol extracts obtained from Phlomis russeliana (Sims.) Lag. ex Benth. (Lamiaceae) were evaluated. Disc diffusion and microdilution methods were used to test the extracts for antimicrobial activity against seven bacteria strains (Bacillus cereusATCC 7064, Bacillus subtilisATCC 6633, Staphylococcus aureusATCC 6538P, Escherichia coliATCC 10538, Proteus vulgarisATCC 6899, Salmonella typhimuriumCCM 5445 and Pseudomonas aeruginosaATCC 27853) and four yeast strains (Kluyveromyces fragilisATCC 8608, Rhodotorula rubraATCC 70403, Debaryomyces hanseniiDSM 70238 and Candida albicansATCC 10239). Notably, they were more effective against the yeast strains than the bacterial strains. Of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phlomis russeliana; Antioxidant activity; Cytotoxic effect; Antimicrobial activity; Endemic plant.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000500604

Chemical composition and antimicrobial activity of essential oils of Ocimum canum Sims. and Ocimum selloi Benth.
Provedor de dados: 42
Autores: Nascimento,Jeferson C.; Barbosa,Luiz C.A.; Paula,Vanderlucia F.; David,Jorge M.; Fontana,Renato; Silva,Luiz A.M.; França,Robson S.
This work describes the chemical composition and antimicrobial activity of the volatile oils of Ocimum canum and Ocimum selloi, both occurring in Jequié/BA, northeastern Brazil. The plants were collected in the winter/2005 andsummer/2006, the oils extracted by steam distillation and further analyzed by GC-MS. A total of 30 and 31 compounds was identified from the oils of O. selloi and O. canum, respectively. It was observed that the oil content of O. canum showed variation during the seasons, while the oils of O. selloi did not. Methylchavicol and linalool were the main chemical components found in the aerial parts and leaves of O. canum. This finding permitted to characterize this specimen as a new chemotype of O. canum. Regarding the aerial parts of O....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; Essential oil; Lamiaceae; Ocimum canum; Ocimum selloi.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652011000300004

Evaluation of the antimicrobial and antioxidant activity of 7-hydroxy-4’, 6-dimethoxy-isoflavone and essential oil from Myroxylon peruiferum L.f
Provedor de dados: 42
Autores: PEREIRA,RAFAEL; PEREIRA,ANNA L.; FERREIRA,MARCILIO M.; FONTENELLE,RAQUEL O.S.; SAKER-SAMPAIO,SILVANA; SANTOS,HÉLCIO S.; BANDEIRA,PAULO N.; VASCONCELOS,MAYRON A.; QUEIROZ,JOSÉ A.N.; BRAZ-FILHO,RAIMUNDO; TEIXEIRA,EDSON H.
Abstract: This study evaluated the antibacterial, antifungal, and antioxidant effect of 7-hydroxy-4’,6-dimethoxy-isoflavone and essential oil of Myroxylon peruiferum. The compound was isolated and its structure elucidated by NMR. The chemical composition of essential oil determined by GC-MS analysis. To evaluation of antimicrobial activity, the Minimum Inhibitory Concentration (MIC), Minimum Bactericidal Concentration (MBC) and Minimum Fungicidal Concentration (MFC) were performed. In addition to analysis of antioxidant activity, DPPH radical scavenging tests, iron chelating assay (FIC), antioxidant reducing power assay (FRAP) and β-carotene bleaching assay (BCB) were performed. For the essential oil were identified 24 organized compounds having as main...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; Antioxidant activity; Essential oil; Isoflavone; Myroxylon peruiferum.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000300602

Synergistic activity of doped zinc oxide nanoparticles with antibiotics: ciprofloxacin, ampicillin, fluconazole and amphotericin B against pathogenic microorganisms
Provedor de dados: 42
Autores: SHARMA,NEHA; JANDAIK,SAVITA; KUMAR,SANJEEV.
ABSTRACT Combination therapy of antibiotics and nanoparticles can be used against multi drug resistant microorganisms. Nanoparticles (NPs) have been reported to show antimicrobial activity. The antimicrobial activities of doped ZnO nanoparticles (ZnO NPs) were studied against fungi, gram-positive and gram-negative bacteria using the standard microdilution method. The interaction between the nanoparticle and the antibiotic was estimated by calculating the fractional inhibitory concentration (FIC index) of the combination through checkerboard assay. Experimental results demonstrated that 10% doped zinc oxide nanoparticles (ZnO NPs) exhibited the maximum antimicrobial effect in contrast with that of the 1% loading and pure ZnO nanoparticles. The enhancement...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; MIC; ZnO nanoparticles; FIC; Checkerboard assay.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652016000501689

Compositional studies and Biological activities of Perovskia abrotanoides Kar. oils
Provedor de dados: 48
Autores: Ashraf,Sadaf Naz; Zubair,Muhammad; Rizwan,Komal; Tareen,Rasool Bakhsh; Rasool,Nasir; Zia-Ul-Haq,Muhammad; Ercisli,Sezai.
BACKGROUND: Current study has been designed to evaluate the chemical composition of essential and fixed oils from stem and leaves of Perovskia abrotanoides and antioxidant and antimicrobial activities of these oils. RESULTS: GC-MS analysis of essential oil identified 19 compounds with (E)-9-dodecenal being the major component in stem and hexadecanoic acid in leaves. In contrast, GC-MS analysis of fixed oil showed 40 constituents with &amp;#945;-amyrin the major component in stem and &amp;#945;-copaene in leaves. The antioxidant activity showed the highest value of 76.7% in essential oil from leaves in comparison with fixed oil from stem (45.9%) through inhibition of peroxidation in linoleic acid system. The antimicrobial assay tested on different...
Tipo: Journal article
Palavras-chave: Perovskia abrotanoides; Essential oil; Fixed oil; Antioxidant capacity; Antimicrobial activity.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100012

In vivo antipyretic, antiemetic, in vitro membrane stabilization, antimicrobial, and cytotoxic activities of different extracts from Spilanthes paniculata leaves
Provedor de dados: 48
Autores: Hossain,Mohammad Mobarak; Ahamed,Sayed Koushik; Dewan,Syed Masudur Rahman; Hassan,Md Mahadi; Istiaq,Arif; Islam,Mohammad Safiqul; Moghal,Md Mizanur Rahman.
BACKGROUND: The study was conducted to evaluate the in vitro antimicrobial activity, cytotoxic, and membrane stabilization activities, and in vivo antiemetic and antipyretic potentials of ethanolic extract, n-hexane and ethyl acetate soluble fractions of Spilanthes paniculata leaves for the first time widely used in the traditional treatments in Bangladesh. RESULTS: In antipyretic activity assay, a significant reduction (P &lt; 0.05) was observed in the temperature in the mice tested. At dose 400 mg/kg-body weight, the n-hexane soluble fraction showed the effect (36.7 ± 0.63°C ) as like as the standard (dose 150 mg/kg-body weight) after 5 h of administration. Extracts showed significant (P &lt; 0.001) potential when tested for the antiemetic activity...
Tipo: Journal article
Palavras-chave: Antiemetic; Anti-inflammatory; Antimicrobial activity; Brine shrimp lethality bioassay; Cytotoxic; Membrane stabilization; Spilanthes paniculata.
Ano: 2014
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602014000100045

Biocidal activity of partially purified fractions from methanolic extract of Garcinia kola (Heckel) seeds on bacterial isolates
Provedor de dados: 48
Autores: AKINPELU,DA; ADEGBOYE,MF; ADELOYE,OA; OKOH,AI.
The in vitro antibacterial activity of crude methanolic extract of the seeds of Garcinia kola was investigated. The extracts exhibited antibacterial activities with zones of inhibition ranging from 10 mm to 25 mm. The minimum inhibitory concentration of the diethyl ether fraction was between 0.313 and 5.0 mg/ml, while that of butanol fraction varied from 0.157 to 5.0 mg/ml. The butanol fraction killed about 77% of Bacillus anthracis and 79% of Escherichia coli cells within 120 min at a concentration of 5.0 mg/ml. Protein leakage from the B. anthracis and E. coli cells when exposed to the butanol and diethyl ether fractions was observed. We conclude that Garcinia kola seed extract has a broad spectrum antibacterial activity, with the butanol and diethyl...
Tipo: Journal article
Palavras-chave: Garcinia kola; Antimicrobial activity; MIC; Killing rate; Protein leakage.
Ano: 2008
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602008000300005

Sponges in Peru and their potential as a source of antibacterial compounds
Provedor de dados: 50
Autores: Cóndor-Luján,Báslavi; Francia-Quiroz,Juan C.
ABSTRACT In the last decades, sponges have emerged as the largest source of active compounds of animal origin for pharmaceutical purposes. In Peru information on these animals is incipient and scattered, which limits taking the right measures for their adequate management, exploitation, and conservation. The aim of this study is to provide an update on the scope and perspectives of sponge research in Peru, with an emphasis on species richness and their antibacterial potential. Likewise, research initiatives carried out in other South American Pacific countries are reviewed. Research efforts in Peru have allowed the description of 46 species; however, the sponge richness is underestimated. On the other hand, in other latitudes, active principles with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; Bacteria; Biotechnology; Marine biodiversity; Porifera.
Ano: 2022
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0122-97612022000200107

Production and Characterization of Bacteriocin Produced by Lactobacillus Viridescence(NICM 2167)
Provedor de dados: 52
Autores: KP,Sure; PV,Kotnis; PK,Bhagwat; RC,Ranveer; PB,Dandge; AK,Sahoo.
The present study focused on the production optimization of bacteriocin by Lactobacillus viridescence NICM 2167 followed by its purification and characterization. The bacteriocins are antimicrobial peptides produced by many Gram positive and Gram negative bacteria.The bacteriocin produced by LAB (lactic acid bacteria) received attention in recent years due to their potential application as natural preservatives in food. Bacteriocinproduced by Lactobacillus viridescence showed broad range of antimicrobial activity against food borne pathogens. Production parameters were optimized showing highest production of bacteriocinin MRS broth with pH= 7.0 incubated at 37°C for 48 h. Bacteriocin was purified in two steps involving ammonium sulphate precipitation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lactobacillus viridescence; NICM 2167; Bacteriocin; Antimicrobial activity; Gel filtration.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100407

Cladia aggregata (lichen) from Brazilian northeast: chemical characterization and antimicrobial activity
Provedor de dados: 52
Autores: Martins,Mônica Cristina Barroso; Lima,Marcio James Gonçalves de; Silva,Flávia Pereira; Azevedo-Ximenes,Eulália; Silva,Nicácio Henrique da; Pereira,Eugênia Cristina.
The chemical composition and antimicrobial activity of the Cladia aggregata (Sw.) Nyl. were evaluated. Barbatic acid, depside obtained from C. aggregata, was spectroscopically analyzed and tested, as well as organic extracts. The extracts and purified substance were tested against four Staphylococcus aureus multi-resistant strains. The structure of barbatic acid was confirmed through NMR (¹H; 13C) and elemental ® analysis. Biochromatographic assays showed action of this compound, along with other substances contained in organic extracts, suggesting a synergic action, MIC assays placed barbatic acid in the same level of inhibition to other studied lichen substances.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cladia aggregata; Barbatic acid; Antimicrobial activity.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000100015

In vitro antimicrobial activity and characterization of mangrove isolates of streptomycetes effective against bacteria and fungi of nosocomial origin
Provedor de dados: 52
Autores: Das,Arijit; Bhattacharya,Sourav; Mohammed,Abuelgasim Yegoup Hassan; Rajan,Subbaramiah Sundara.
The study aimed at determining the in vitro antimicrobial activity of alkaliphilic and halotolerant actinomycetes isolated from a mangrove ecosystem and identification of a potent strain. Twenty five isolates of actinomycetes were isolated from the sediment samples of Valapattanam mangrove swamp in Kerala, India. Antimicrobial activity of four selected actinomycete isolates was determined against bacterial and fungal pathogens of nosocomial origin by agar well diffusion method. Molecular characterization of the potent isolate was performed by 16S rDNA sequencing. Isolate no I-1 significantly inhibited Staphylococcus aureus ATCC 25923 (12 mm), S. aureus (15±0.05 mm), S. citreus (20±0.5 mm), Bacillus cereus (17±0.2 mm) and Serratia marcescens (12 mm). It...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Streptomyces xiamenensis; Actinomycetes; Antimicrobial activity; Mangrove swamp.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000300006

Growth, sporulation and production of bioactive compounds by Bacillus subtilis R14
Provedor de dados: 52
Autores: Carvalho,André Lacerda Ulysses de; Oliveira,Fábio Henrique Portella Corrêa de; Mariano,Rosa de Lima Ramos; Gouveia,Ester Ribeiro; Souto-Maior,Ana Maria.
The physiology of B. subtilis R14 was investigated in minimal medium under excess-oxygen and oxygen-limited conditions. Growth and efficient sporulation could be achieved in excess-oxygen culture on medium with readily metabolizable carbon and nitrogen sources, which allowed high growth rate and high biomass yield. A short transition phase between the exponential growth and sporulation could be attained by formulating a medium with a well-balanced C/N ratio. Under oxygen-limitation, but in the presence of essential nutrients (i.e. excess-nutrient cultivation), B. subtilis R14 produced bioactive compounds, which showed activity against several phytopathogenic bacteria. Under anaerobic condition, the organism did not grow neither through fermentation nor...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacillus subtilis; Batch cultivation; Oxygen availability; Antimicrobial activity.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300020

Control of papaya fruits anthracnose by essential oil of Ricinus communis
Provedor de dados: 52
Autores: Siqueira Júnior,César Luis; Freire,Maria das Graças Machado; Moreira,Antônio Sérgio Nascimento; Macedo,Maria Ligia Rodrigues.
The aim of this work was to investigate the potential of castor oil for the control of papaya diseases caused by the fungus Colletotrichum gloeosporioides and the bacterium Pseudomonas caricapapayae. The treatment with 1% castor oil did not significantly affect the fungal growth. The effectiveness of castor oil for the control of anthracnose was shown when 5% and 10% (v/v) were used in the assays resulting in reduced mycelial growth. Fungal sporulation was strongly inhibited at 10% (v/v) concentration of essential oil. The studies with the fresh fruits treated with 5% (v/v) castor oil in aqueous emulsions resulted in effective reduction of pathogen spread in these fruits. No lesion was found in the fruits treated with oil, when compared to the control...
Tipo: Info:eu-repo/semantics/report
Palavras-chave: Antimicrobial activity; Essential oil; Postharvest; Colletotrichum gloeosporioides; Papaya.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000100009

Antimicrobial activity of essential oils from Pimenta pseudocaryophyllus and Tynanthus micranthus
Provedor de dados: 52
Autores: Custódio,Dayana Lacerda; Burgo,Rafaela Pinheiro; Moriel,Bárbara; Barbosa,Aneli de Melo; Rezende,Maria Ines; Daniel,Juliana Feijó de Souza; Pinto,Jurandir Pereira; Bianchini,Edmilson; Faria,Terezinha de Jesus.
The present study describes the chemical composition and antimicrobial activity of essential oils obtained by hydrodistillation from the leaves of Pimenta pseudocaryophyllus (1.0% w/w) and Tynanthus micranthus (1.1% w/w). GC and GC/MS analysis demonstrated that eugenol was the only component in the T. micranthus essential oil (99.9%) and the major component in the P. pseudocaryophyllus essential oil (92.59%), which also presented methyleugenol, terpinen-4-ol, o-cymene and (E)-caryophyllene, among others. Both the oils presented antimicrobial activity against bacteria, yeast and filamentous fungi tested.The Bioautography test revealed that eugenol was the bioactive component in both the oils against Cladosporium herbarum. This is the first report about the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pimenta pseudocaryophyllus; Tynanthus micranthus; Essential oil; Antimicrobial activity.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000600013

GC-MS analysis of Nigella sativa seeds and antimicrobial activity of its volatile oil
Provedor de dados: 52
Autores: Gerige,Saptha Jyothi; Gerige,Mahesh Kumar Yadav; Rao,Muralidhara; Ramanjaneyulu,.
The present study dealt with the hydro distillation of Nigella sativa seeds and GC-MS analysis. The total composition of the oil was 86.7%. The seed volatile oil was tested against 19 microbes (Gram positive, Gram negative and fungi), which showed that Gram negative bacteria Haemophilus influenza, Klebsiella pnemoniae, and Proteus vulgaris were highly sensitive against the antimicrobial agent, whereas the fungi such as Trichoderma vibriae,. Pencillium rubrum; and Dermatophyte: Trichophyton mentagrophytes; had no response at the 20µl concentration.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nigella sativa; Volatile oil; Antimicrobial activity; Antifungal activity.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132009000500016

Characterization of enterocins produced by Enterococcus mundtii isolated from humans feces
Provedor de dados: 52
Autores: Ferreira,Alessandra Einsfeld; Canal,Natália; Morales,Daiana; Fuentefria,Daiane Bopp; Corção,Gertrudes.
The aim of this study was to characterize bacteriocins produced by 70 strains of Enterococcus mundtii.Four strains exhibited antibiotic activity towards Listeria innocua, L. monocytogenes, Lactobacillus plantarum, and Salmonella Enteritidis. They remained active under temperatures of up to 121ºC for 20 min, and under pH treatments that varied from 2.0 to 10.0. Antimicrobial activity was maintained during the storage test for 60 days under freezing. The kinetics of production revealed the peak activity of 1600 AU /mL during the logarithmic growth phase and the molecular weight found was approximately 3.0 kDa. The characterization of the products with antimicrobial activity indicated their proteic nature, presenting a typical kinetics of primary metabolite...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Enterococcus mundtii; Enterocins; Antimicrobial activity; Biopreservative.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000200010

Elicitation Enhanced the Production of Phenolic Compounds and Biological Activities in Hairy Root Cultures of Bitter melon ( Momordica charantia L.)
Provedor de dados: 52
Autores: Chung,Ill-Min; Thiruvengadam,Muthu; Rekha,Kaliyaperumal; Rajakumar,Govindasamy.
ABSTRACT Momordica charantia (Cucurbitaceae) is an important vegetable and also medicinal crop which produces the bioactive compounds for various biological activities with potential uses in human health. The present investigation relates to elicitors of jasmonic acid (JA) and salicylic acid (SA) to enhance biomass accumulation and phenolic compound production in hairy root cultures of M. charantia. Hairy root cultures were elicited with JA and SA at 0, 25, 50 and 100 μM concentrations respectively. The adding of elicitation to the hairy root cultures on the 15th day of culture and the roots were harvested on day 25. Cultures supplemented with 100 μM JA and SA enhanced the phenolic compounds significantly compared to that of non-elicited hairy root...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anticancer activity; Antioxidant activity; Antimicrobial activity; Elicitation; Hairy root cultures; Phenolic compounds.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100430

Antimicrobial, Antioxidant and Cytotoxic Activity of MarineStreptomyces parvulus VITJS11 Crude Extract
Provedor de dados: 52
Autores: Naine,S. Jemimah; Devi,C. Subathra; Mohanasrinivasan,V.; B,Vaishnavi.
The main aim of the study was to evaluate the bioactive properties of ethyl acetate crude extract of Streptomyces parvulus VITJS11 with a view to assess their therapeutic potential. The biological activity of ethyl acetate extract was tested against fungal and bacterial pathogens. The free radical scavenging potential of the crude extract was determined by DPPH assay. The chemo preventive properties of S. parvulus VITJS11 ethyl acetate extract was examined by MTT assay on HepG2 cells. The morphological, physiological and the biochemical properties of the strain S. parvulus VITJS11 was confirmed by conventional methods. Genotypic characterization was done using 16S r-DNA partial gene amplification and sequencing. The authenticity of the crude chemical...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Marine actinomycetes; Streptomyces parvulusVITJS11; Antimicrobial activity; Antioxidants; Cytotoxicity; Bioactive compounds.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000200198

Comparative Microbicidal Efficacy of Fractionated Extracts from In Vitro and In Vivo Raised Cells of Tinosporacordifolia Against MDR Pathogens
Provedor de dados: 52
Autores: Mittal,Jitendra; Singh,Abhijeet; Batra,Amla; Sharma,Madan Mohan.
The present study was conducted to explore the hidden potential of natural products synthesized in the medicinal plant Tinosporacordifolia. This plantis prioritized by National Medicinal Plant Board, New Delhi. Leaf and inter nodal segments were inoculated on MS Medium fortified with IBA (1.0 mg/L) produced callus after four weeks. The calli were brown due to phenolic substance secreted by the explant. This problem was overcome by using adjuvant PVP (0.1%). Further, secondary metabolites were isolated from callus and field leaf through soxhlet extractor and fractionated by using column chromatography. The antibacterial activity of these fractioned extracts from Tinosporacordifolia callus and leaf were seen against multi drug resistance bacteria viz.,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Medicinal plants; Callus; Natural products; PVP; Antimicrobial activity.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132016000100406

Endophytic fungi occurring in Ipomoea carnea tissues and their antimicrobial potentials
Provedor de dados: 52
Autores: Tayung,Kumanand; Sarkar,Meenakshi; Baruah,Paran.
The aim of this work was to study the endophytic fungi associated with the tissues of Ipomoea carnea, a common invasive plant of India. A total of 69 isolates belonging to ten taxa comprising 1.45% Zygomycetes, 10.14% Coelomycetes, 62.32% Hypomycetes, 18.84% sterile mycelia and 7.25% unidentified species were obtained. Species of Curvularia, Aspergillus, Fusarium, Colletotrichum and sterile fungus were isolated as dominant endophytes. Colonization frequency of Curvularia (7.25%) was highest which was isolated from all the tissues. The samples collected during the monsoon harbored more endophytes and showed higher species richness than the samples obtained in summer season. Of the total isolates, 15 isolates (21.74%) displayed antimicrobial activity,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Ipomoea carnea; Endophytic fungi; Curvularia; Antimicrobial activity.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132012000500003

Antimicrobial activity of Syagrus coronata (Martius) Beccari
Provedor de dados: 52
Autores: Hughes,Alice Ferreira da Silva; Lima,Fabíola Guedes de; Lucchese,Angélica Maria; Góes Neto,Aristóteles; Uetanabaro,Ana Paula Trovatti.
This work aimed to evaluate the antimicrobial activity of aqueous and methanol extracts of leaves, inflorescences, nut-shell, liquid and solid endosperm nuts of Syagrus coronata against pathogenic bacteria and yeast. Screening was initially performed using the agar dilution method. The extracts regarded as bioactive underwent liquid-liquid partition for determination of their minimum inhibitory concentration and minimum bactericide concentration (MIC and MBC) and those of their respective fractions against the microorganisms inhibited in preliminary tests. Antimicrobial activity was observed only in inflorescences. The corresponding aqueous extract was effective against B. cereus and the three strains of S. aureus, and the corresponding MIC and MCB values...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Syagrus coronata; Arecaceae; Antimicrobial activity.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000200012

Antimicrobial activity of a biosurfactant produced by Bacillus licheniformis strain M104 grown on whey
Provedor de dados: 52
Autores: Gomaa,Eman Zakaria.
The aim of the present study was to investigate the antimicrobial effect of the lipopeptide biosurfactants produced by Bacillus licheniformis strain M104 grown on whey. The biosurfactant was investigated for potential antimicrobial activity by using the disc-diffusion method against different Gram-positive bacteria {B subtilis, B. thuringiensis (two strains), B. cereus, Staphylococcus aureus (two strains) and Listeria monocytogenes)}, Gram-negative bacteria {(Pseudomonas aeruginosa, Escherichia coli (two strains), Salmonella typhimurium, Proteous vulgaris and Klebsiella pneumoniae) and a yeast (Candida albicans)}. The biosurfactant showed profoundly distinct antibacterial activity toward tested bacteria and displayed an antifungal activity against the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biosurfactant; Bacillus licheniformis; Cheese whey; Antimicrobial activity; Staphylococcus aureus.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132013000200011

Chemical characterization, antioxidant and antimicrobial activity of propolis obtained from Melipona quadrifasciata quadrifasciata and Tetragonisca angustula stingless bees
Provedor de dados: 56
Autores: Torres,A.R.; Sandjo,L.P.; Friedemann,M.T.; Tomazzoli,M.M.; Maraschin,M.; Mello,C.F.; Santos,A.R.S.
In this study, we investigated the chemical composition, and antioxidant and antibacterial properties of ethanolic extracts of propolis (EEP) from Melipona quadrifasciata quadrifasciata and Tetragonisca angustula. Chemical composition of EEP was determined by colorimetry and chromatographic (HPLC-DAD and UPLC-Q/TOF-MS/MS) analysis. Antimicrobial activity of EEP was evaluated against gram-positive (S. aureus, methicillin-resistant S. aureus, E. faecalis) and gram-negative (E. coli and K. pneumoniae) bacteria by the minimal inhibitory concentration (MIC) test using the microdilution method. Furthermore, the growth curve and integrity of cell membrane of S. aureus and E. coli were investigated using standard microbiological methods. HPLC-DAD analysis showed...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Stingless bees; Propolis; Antimicrobial activity; S. aureus; M. quadrifasciata quadrifasciata; T. angustula.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2018000600617

Antimicrobial activity of the essential oil from Lippia sidoides, carvacrol and thymol against oral pathogens
Provedor de dados: 56
Autores: Botelho,M.A.; Nogueira,N.A.P.; Bastos,G.M.; Fonseca,S.G.C.; Lemos,T.L.G.; Matos,F.J.A.; Montenegro,D.; Heukelbach,J.; Rao,V.S.; Brito,G.A.C.
Dental caries and periodontal disease are associated with oral pathogens. Several plant derivatives have been evaluated with respect to their antimicrobial effects against such pathogenic microorganisms. Lippia sidoides Cham (Verbenaceae), popularly known as "Alecrim-pimenta" is a typical shrub commonly found in the Northeast of Brazil. Many plant species belonging to the genus Lippia yield very fragrant essential oils of potential economic value which are used by the industry for the commercial production of perfumes, creams, lotions, and deodorants. Since the leaves of L. sidoides are also extensively used in popular medicine for the treatment of skin wounds and cuts, the objective of the present study was to evaluate the composition and antimicrobial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lippia sidoides; Essential oil; Antimicrobial activity; Oral pathogens.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2007000300010

Antioxidant and antimicrobial activities of Bauhinia racemosa L. stem bark
Provedor de dados: 56
Autores: Kumar,R.S.; Sivakumar,T.; Sunderam,R.S.; Gupta,M.; Mazumdar,U.K.; Gomathi,P.; Rajeshwar,Y.; Saravanan,S.; Kumar,M.S.; Murugesh,K.; Kumar,K.A.
The present study was carried out to evaluate the antioxidant and antimicrobial activities of a methanol extract of Bauhinia racemosa (MEBR) (Caesalpiniaceae) stem bark in various systems. 1,1-Diphenyl-2-picryl-hydrazyl (DPPH) radical, superoxide anion radical, nitric oxide radical, and hydroxyl radical scavenging assays were carried out to evaluate the antioxidant potential of the extract. The antioxidant activity of the methanol extract increased in a concentration-dependent manner. About 50, 100, 250, and 500 µg MEBR inhibited the peroxidation of a linoleic acid emulsion by 62.43, 67.21, 71.04, and 76.83%, respectively. Similarly, the effect of MEBR on reducing power increased in a concentration-dependent manner. In DPPH radical scavenging assays the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bauhinia racemosa; Antioxidant activity; Lipid peroxidation; Scavenging superoxide; DPPH assay; Antimicrobial activity.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005000700004

Antioxidant and antimicrobial activities of bitter and sweet apricot (Prunus armeniaca L.) kernels
Provedor de dados: 56
Autores: Yiğit,D.; Yiğit,N.; Mavi,A.
Abstract &lt;img border=0 id="_x0000_i1034" src="../img/back.gif"&gt; The present study describes the in vitro antimicrobial and antioxidant activity of methanol and water extracts of sweet and bitter apricot (Prunus armeniaca L.) kernels. The antioxidant properties of apricot kernels were evaluated by determining radical scavenging power, lipid peroxidation inhibition activity and total phenol content measured with a DPPH test, the thiocyanate method and the Folin method, respectively. In contrast to extracts of the bitter kernels, both the water and methanol extracts of sweet kernels have antioxidant potential. The highest percent inhibition of lipid peroxidation (69%) and total phenolic content (7.9 ± 0.2 µg/mL) were detected in the methanol extract of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Apricot (Prunus armeniaca L.) kernels; Antioxidant activity; Antimicrobial activity; Total phenolic compounds.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2009000400006

Screening for antimicrobial activity of natural products using a microplate photometer
Provedor de dados: 58
Autores: Devienne,Karina F.; Raddi,Maria Stella G.
The microdilution technique, using a microplate photometer, to determine the minimal inhibitory concentration (MIC) for a natural product was compared to the serial tube dilution method. The MIC obtained for Paepalantine against S. aureus was the same by the two methods, showing an antimicrobial effect similar to chloramphenicol.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; Microdilution; Spectrophotometric method.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000200014

Citrininotoxinogenicity of Penicillium spp. isolated from decaying apples
Provedor de dados: 58
Autores: Pepeljnjak,Stjepan; Šegvic,Maja; Ozegovic,Ladislav.
A study on the occurrence of citrinin and citrinin production ability of Penicillium spp. isolated from decaying apples collected from households in Croatia was carried out. Among 100 samples of apples, 37 strains of Penicillium spp. were found, including P. expansum, P. roqueforti, P. implicatum and P. purpurogenum. Citrinin production in liquid yeast medium by 11 strains of P. expansum varied in a range of 0.07 to 9.00 mg.kg-1. Citrinin was isolated from 19% of apple samples in range of 0.05 to 0.24 mg.kg-1. Antimicrobial activity of isolated citrinin, evaluated through tests on Bacillus subtilis, presented inhibitory zones varying from 5 mm to 1 cm. Minimal inhibitory concentrations (MIC) were 0.0072 µg.mL-1 for bacteriostatic effect, and 0.0144 µg.mL-1...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Citrinin; Penicillium expansum; Decaying apples; Antimicrobial activity.
Ano: 2002
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000200007

Composition and antimicrobial activity of essential oils from aromatic plants used in Brazil
Provedor de dados: 58
Autores: Sartoratto,Adilson; Machado,Ana Lúcia M.; Delarmelina,Camila; Figueira,Glyn Mara; Duarte,Marta Cristina T.; Rehder,Vera Lúcia G.
Essential oils from aerial parts of Mentha piperita, M. spicata, Thymus vulgaris, Origanum vulgare, O. applii, Aloysia triphylla, Ocimum gratissimum, O. basilicum were obtained by steam destillation using a Clevenger-type system. These oils were screened for antibacterial and anti-Candida albicans activity using bioautographic method. Subsequently, minimal inhibitory concentration from oils was determined by microdilution method. Most essential oil studied were effective against Enterococcus faecium and Salmonella cholerasuis. Aloysia triphylla and O. basilicum presented moderate inhibition against Staphylococcus aureus while only A. tryphila and M. piperita were able to control the yeast Candida albicans. The oils were analyzed by GC and GC-MS techniques...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Essential oil; Medicinal plants; Antimicrobial activity; Minimal inhibitory concentration.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000300001

Antibacterial activity of plant extracts and phytochemicals on antibiotic-resistant bacteria
Provedor de dados: 58
Autores: Nascimento,Gislene G. F.; Locatelli,Juliana; Freitas,Paulo C.; Silva,Giuliana L.
The antimicrobial activity of plant extracts and phytochemicals was evaluated with antibiotic susceptible and resistant microorganisms. In addition, the possible synergistic effects when associated with antibiotics were studied. Extracts from the following plants were utilized: Achillea millifolium (yarrow), Caryophyllus aromaticus (clove), Melissa offficinalis (lemon-balm), Ocimun basilucum (basil), Psidium guajava (guava), Punica granatum (pomegranate), Rosmarinus officinalis (rosemary), Salvia officinalis (sage), Syzygyum joabolanum (jambolan) and Thymus vulgaris (thyme). The phytochemicals benzoic acid, cinnamic acid, eugenol and farnesol were also utilized. The highest antimicrobial potentials were observed for the extracts of Caryophyllus aromaticus...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Plant extracts activity; Medicinal plants; Antimicrobial activity.
Ano: 2000
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000400003

Antiviral activity of the Lippia graveolens (Mexican oregano) essential oil and its main compound carvacrol against human and animal viruses
Provedor de dados: 58
Autores: Pilau,Marciele Ribas; Alves,Sydney Hartz; Weiblen,Rudi; Arenhart,Sandra; Cueto,Ana Paula; Lovato,Luciane Teresinha.
Mexican oregano (Lippia graveolens) is a plant found in Mexico and Central America that is traditionally used as a medicinal herb. In the present study, we investigated the antiviral activity of the essential oil of Mexican oregano and its major component, carvacrol, against different human and animal viruses. The MTT test (3-4,5-dimethythiazol-2yl)-2,5-diphenyl tetrazolium bromide) was conducted to determine the selectivity index (SI) of the essential oil, which was equal to 13.1, 7.4, 10.8, 9.7, and 7.2 for acyclovir-resistant herpes simplex virus type 1 (ACVR-HHV-1), acyclovir-sensitive HHV-1, human respiratory syncytial virus (HRSV), bovine herpesvirus type 2 (BoHV-2), and bovine viral diarrhoea virus (BVDV), respectively. The human rotavirus (RV) and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Verbenaceae; Antimicrobial activity; RNA virus; DNA virus; Condimental herbs.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000400049

Evaluation of some pharmacological activities of Budmunchiamine - A isolated from Albizia amara
Provedor de dados: 58
Autores: Thippeswamy,Sreerangegowda; Mohana,Devihalli Chikkaiah; Abhishek,Rayasandra Umesh; Manjunath,Kiragandur.
The present investigations were aimed to evaluate the antimicrobial and antioxidant efficacies of budmunchiamine-A (BUA) of Albizia amara. The activity-guided isolation leaded to isolate the bioactive compound budmunchiamine-A from alkaloid extract of A. amara. The budmunchiamine-A showed significant broad-spectrum antimicrobial activity with zone of inhibition (ZOI), minimum inhibitory concentration (MIC) and minimum bactericidal/fungicidal concentration (MBC/MFC) values varied from 7.3 to 24.5 mm, 0.95 to 62.5 μg/mL, and 1.9 to 250 μg/mL, respectively. The budmunchiamine-A exhibited moderate antioxidant activity with inhibitory concentration 50% (IC50) value of 400 μg/mL in 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay and percent inhibition of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Albizia amara; Budmunchiamine-A; Antimicrobial activity; Antioxidant activity.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000100139

Essential oil of Lithraea molleoides (Vell.): chemical composition and antimicrobial activity
Provedor de dados: 58
Autores: Shimizu,Mario Tsunezi; Bueno,Leandro de Jesus Franco; Rodrigues,Rosa Fátima Oliveira; Sallowicz,Fabiano Augusto; Sawaya,Alexandra Christine Helena Frankland; Marques,Márcia Ortiz Maio.
Lithraea molleoides (Vell.) (Anacardiaceae) is a tree found in Brazil, Paraguay, Bolivia, Uruguay, Argentina and Chile. It is popularly used in the form of alcoholic extracts, decoctions and infusions for the treatment of cough, bronchitis, arthritis, diseases of the digestive system and as diuretic, tranquilizer, haemostatic and tonic agent. The objectives of this study were the extraction of the essential oil of the mature fruit, leaves and aerial parts of the plant and quantification of the yield thereof; the identification and quantification of the principal components of the essential oil and the determination of its antimicrobial activity against bacteria and yeast. The essential oil yield of the mature fruits was 1.0% but essential oil was not...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lithraea molleoides; Essential oil; Chemical composition; Antimicrobial activity.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000400028

An investigation on in vitro and in vivo antimicrobial properties of the antidepressant: amitriptyline hydrochloride
Provedor de dados: 58
Autores: Mandal,Anurup; Sinha,Chandrima; Jena,Aditya Kumar; Ghosh,Soma; Samanta,Amalesh.
The antidepressant drug amitriptyline hydrochloride was obtained in a dry powder form and was screened against 253 strains of bacteria which included 72 Gram positive and 181 Gram negative bacteria and against 5 fungal strains. The minimum inhibitory concentration (MIC) was determined by inoculating a loopful of an overnight peptone water culture of the organism on nutrient agar plates containing increasing concentrations of amitriptyline hydrochloride (0, 10 µg/mL, 25 µg/mL, 50 µg/mL, 100 µg/mL, 200 µg/mL). Amitriptyline hydrochloride exhibited significant action against both Gram positive and Gram negative bacteria at 25-200 µg/mL. In the in vivo studies it was seen that amitriptyline hydrochloride at a concentration of 25 µg/g and 30 µg/g body weight of...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Amitriptyline hydrochloride; Antimicrobial activity; Non antibiotics.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000300014

Antimicrobial activity and acetylcholinesterase inhibition by extracts from chromatin modulated fungi
Provedor de dados: 58
Autores: Lima,Matheus Thomaz Nogueira Silva; Santos,Larissa Batista dos; Bastos,Rafael Wesley; Nicoli,Jacques Robert; Takahashi,Jacqueline Aparecida.
ABSTRACT Major health challenges as the increasing number of cases of infections by antibiotic multiresistant microorganisms and cases of Alzheimer's disease have led to searching new control drugs. The present study aims to verify a new way of obtaining bioactive extracts from filamentous fungi with potential antimicrobial and acetylcholinesterase inhibitory activities, using epigenetic modulation to promote the expression of genes commonly silenced. For such finality, five filamentous fungal species (Talaromyces funiculosus, Talaromyces islandicus, Talaromyces minioluteus, Talaromyces pinophilus, Penicillium janthinellum) were grown or not with DNA methyltransferases inhibitors (procainamide or hydralazine) and/or a histone deacetylase inhibitor...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; Acetylcholinesterase inhibition; Epigenetic modulation; Penicillium sp.; Talaromyces sp.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000100169

Screening of actinomycetes from earthworm castings for their antimicrobial activity and industrial enzymes
Provedor de dados: 58
Autores: Kumar,Vijay; Bharti,Alpana; Negi,Yogesh Kumar; Gusain,Omprakash; Pandey,Piyush; Bisht,Gajraj Singh.
Actinomycetes from earthworm castings were isolated and screened for their antimicrobial activity and industrial enzymes. A total of 48 isolates were obtained from 12 samples of earthworm castings. Highest numbers of isolates were recovered from forest site (58.33 %) as compared to grassland (25%) and agricultural land (16.66%). The growth patterns, mycelial coloration of abundance actinomycetes were documented. The dominant genera Identified by cultural, morphological and physiological characteristics were Streptomyces (60.41%) followed by Streptosporangium (10.41%), Saccharopolyspora (6.25%) and Nocardia (6.25%). Besides these, other genera like Micromonospora, Actinomadura, Microbispora, Planobispora and Nocardiopsis were also recovered but in low...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; Enzymes; Earthworm castings; Actinomycetes.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100022

Evaluation of the in vitro antimicrobial activity of crude extracts of three Miconia species
Provedor de dados: 58
Autores: Celotto,Andréa Carla; Nazario,Daniela Zaupa; Spessoto,Marcela de Almeida; Martins,Carlos Henrique Gomes; Cunha,Wilson Roberto.
The antimicrobial activity of nine crude extracts of three Miconia species (M. albicans, M. rubiginosa and M. stenostachya) was tested against eleven selected microorganisms: Staphylococcus aureus, Staphylococcus saprophyticus, Proteus mirabilis, Escherichia coli, Enterococcus faecalis, Shigella flexneri, Klebsiella pneumoniae, Salmonella sp, Pseudomonas aeruginosa, Streptococcus agalactiae and Candida albicans. The results of the test showed that three extracts had some antimicrobial activity by well diffusion method. The ethanol extracts of Miconia albicans and Miconia rubiginosa were the most active.
Tipo: Info:eu-repo/semantics/other
Palavras-chave: Antimicrobial activity; Miconia; Melastomataceae.
Ano: 2003
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000400010

Antimicrobial activity of surfactants produced by Bacillus subtilis R14 against multidrug-resistant bacteria
Provedor de dados: 58
Autores: Fernandes,Paulo André Vicente; Arruda,Isabel Renata de; Santos,Antônio Fernando Amatto Botelho dos; Araújo,Ana Albertina de; Maior,Ana Maria Souto; Ximenes,Eulália Azevedo.
Lipopeptides represent a class of microbial surfactants with increasing scientific, therapeutic and biotechnological interests. The genus Bacillus is a producer of these active compounds, and among them B. subtilis produces surfactin, the most potent biosurfactant known. These compounds can act as antibiotics, antivirals, antitumorals, immunomodulators and enzyme inhibitors. In this work, the antimicrobial activity of biosurfactants obtained by cultivation of B. subtilis R14 was investigated against multidrug-resistant bacteria. During cultivation in defined medium, the surface tension of the medium was reduced from 54 mN/m in the beginning of the microbial growth to 30 mN/m after 20 hours. A crude surfactant concentration of 2.0 g/L was obtained after 40...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biosurfactant; Bacillus subtilis; Lipopeptides; Antimicrobial activity.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000400022

Expression of mouse beta defensin 2 in Escherichia coli and its broad-spectrum antimicrobial activity
Provedor de dados: 58
Autores: Gong,Tianxiang; Li,Wanyi; Wang,Yueling; Jiang,Yan; Zhang,Qiang; Feng,Wei; Jiang,Zhonghua; Li,Mingyuan.
Mature mouse beta defensin 2 (mBD2) is a small cationic peptide with antimicrobial activity. Here we established a prokaryotic expression vector containing the cDNA of mature mBD2 fused with thioredoxin (TrxA), pET32a-mBD2. The vector was transformed into Escherichia Coli (E. coli) Rosseta-gami (2) for expression fusion protein. Under the optimization of fermentation parameters: induce with 0.6 mM isopropylthiogalactoside (IPTG) at 34ºC in 2×YT medium and harvest at 6 h postinduction, fusion protein TrxA-mBD2 was high expressed in the soluble fraction (&gt;95%). After cleaved fusion protein by enterokinase, soluble mature mBD2 was achieved 6 mg/L with a volumetric productivity. Purified recombinant mBD2 demonstrated clear broad-spectrum antimicrobial...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Mouse beta defensin 2; Expression; Purification; Antimicrobial activity.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000300043

Free radical scavenging and antimicrobial properties of extracts of wild mushrooms
Provedor de dados: 58
Autores: Oyetayo,V.O.
Antioxidant and antimicrobial potentials of extracts obtained from four wild mushrooms, Termitomyces clypeatus (TCE), Termitomyces robustus (TRE), Lentinus subnudus (LSE) and Lenzites species (LZE) collected in Nigeria were investigated. LSE and LZE displayed good scavenging activity against 2, 2-Diphenyl-1-Picrylhydrazyl (DPPH) and ferrous ion radicals at concentration of 2 mg/mL. However, TRE and TCE exhibited better superoxide anion scavenging effect at 2 mg/mL. All extracts (TCE, TRE, LSE and LZE) had comparable scavenging effect on hydroxyl radicals as butylated Hydroxytoluene (BHT) used as control. Moreover, extracts from the wild mushrooms were able to inhibit the growth of all indicator organisms at concentrations between 12.5 mg/mL to 100 mg/mL....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Wild mushrooms; Antimicrobial activity; Free radical scavenging.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000200031

Antimicrobial activity of Syzygium cumini (Myrtaceae) leaves extract
Provedor de dados: 58
Autores: Oliveira,Guilherme Ferreira de; Furtado,Niege Araçari Jacometti Cardoso; Silva Filho,Ademar Alves da; Martins,Carlos Henrique Gomes; Bastos,Jairo Kenupp; Cunha,Wilson Roberto; Silva,Márcio Luís de Andrade e.
The antimicrobial activity of Syzygium cumini leaves extract, known as "jambolão", was evaluated. The crude hydroalcoholic extract was active against Candida krusei (inhibition zone of 14.7 ± 0.3 mm and MIC = 70 µg/mL), and against multi-resistant strains of Pseudomonas aeruginosa, Klebsiella pneumoniae and Staphylococcus aureus.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; Disk diffusion method; Microdilution broth method; Multi-resistant strains; Syzygium cumini.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000200035

Control of Colletotrichum gloeosporioides (penz.) Sacc. In yellow passion fruit using Cymbopogon citratus essential oil
Provedor de dados: 58
Autores: Anaruma,Nina Duarte; Schmidt,Flávio Luís; Duarte,Marta Cristina Teixeira; Figueira,Glyn Mara; Delarmelina,Camila; Benato,Eliane Aparecida; Sartoratto,Adilson.
The use of antibiotics in agriculture is limited when compared to their applications in human and veterinary medicine. On the other hand, the use of antimicrobials in agriculture contributes to the drug resistance of human pathogens and has stimulated the search for new antibiotics from natural products. Essential oils have been shown to exert several biological activities including antibacterial and antifungal actions. The aim of this study was to determine the activity of 28 essential oils from medicinal plants cultivated at CPMA (Medicinal and Aromatic Plants Collection), CPQBA/UNICAMP, against Colletotrichum gloeosporioides (Penz.) Sacc., the anthracnose agent in yellow passion fruit (Passiflora edulis Sims f. flavicarpa Deg), as well as evaluating...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Yellow passion fruit; Colletotrichum gloeosporioides; Anthracnose; Antimicrobial activity; Minimal inhibitory concentration.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000100012

Evaluation of antimicrobial activity of extracts of Tibouchina candolleana (melastomataceae), isolated compounds and semi-synthetic derivatives against endodontic bacteria
Provedor de dados: 58
Autores: Santos,Fernanda M. dos; Souza,Maria Gorete de; Crotti,Antônio E. Miller; Martins,Carlos H. G.; Ambrósio,Sérgio R.; Veneziani,Rodrigo C. S.; Silva,Márcio L. Andrade e; Cunha,Wilson R.
This work describes the phytochemical study of the extracts from aerial parts of Tibouchina candolleana as well as the evaluation of the antimicrobial activity of extracts, isolated compounds, and semi-synthetic derivatives of ursolic acid against endodontic bacteria. HRGC analysis of the n-hexane extract of T. candolleana allowed identification of b-amyrin, a-amyrin, and b-sitosterol as major constituents. The triterpenes ursolic acid and oleanolic acid were isolated from the methylene chloride extract and identified. In addition, the flavonoids luteolin and genistein were isolated from the ethanol extract and identified. The antimicrobial activity was investigated via determination of the minimum inhibitory concentration (MIC) using the broth...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Tibouchina candolleana; Ursolic acid; Antimicrobial activity.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000200045

Effects of the protective, curative, and eradicative applications of chitosan against Penicillium expansum in apples
Provedor de dados: 58
Autores: Darolt,Josiane Cecília; Rocha Neto,Argus Cezar da; Di Piero,Robson Marcelo.
Abstract Apple is one of the most important temperate fruit to Brazil economy, and the use of synthetic chemicals has been the main method for reducing postharvest diseases, such as the blue mold, caused by Penicillium expansum. This work intends to evaluate the practical utilization of chitosan for blue mold control. For this purpose, fruits were treated in a preventive and curative way, immersing the fruits in chitosan solution (5 or 10 mg mL-1), or adding a single drop of this solution (10 mg mL-1) directly into the injuries. The eradicative effect of the polysaccharide was also evaluated in vitro and in vivo. Chitosan did not show a curative effect against the blue mold, and its eradicative effect was only evidenced on the higher concentration (10 mg...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; Alternative control; Chitosan; Malus domestica; Polysaccharide.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000401014

Synergistic effect of propolis and antibiotics on the Salmonella Typhi
Provedor de dados: 58
Autores: Orsi,Ricardo de Oliveira; Sforcin,José Maurício; Funari,Silvia Regina Cunha; Fernandes Junior,Ary; Bankova,Vassya.
The goal of this work was to investigate a possible synergistic effect between ethanolic extracts of propolis from Brazil and Bulgaria and some antibiotics (Amoxicillin, Ampicillin and Cefalexin) against Salmonella Typhi. Brazilian and Bulgarian propolis showed an antibacterial action, but the sample from Bulgaria was shown to be more efficient. Both samples showed a similar synergistic effect with these antibiotics. One may conclude that the propolis samples show an important antibacterial action, as well as a synergistic effect with antibiotics against Salmonella Typhi.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Propolis; Antimicrobial activity; Antibiotics; Synergistic effect.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000200002

Antimicrobial efficacy of Curcuma zedoaria extract as assessed by linear regression compared with commercial mouthrinses
Provedor de dados: 58
Autores: Bugno,Adriana; Nicoletti,Maria Aparecida; Almodóvar,Adriana A. B.; Pereira,Tatiana C.; Auricchio,Mariângela T.
The antimicrobial activity of Curcuma zedoaria (Christm) Roscoe extract against some oral microorganisms was compared with the antimicrobial activity of five commercial mouthrinses in order to evaluate the potential of the plant extract to be incorporated into formulas for improving or creating antiseptic activity. The in vitro antimicrobial efficacy of plant extracts and commercial products were evaluated against Streptococcus mutans, Enterococcus faecalis, Staphylococcus aureus and Candida albicans using a linear regression method to evaluate the microbial reduction obtained in function of the exposure time, considering as effectiveness a 99.999% reduction in count of standardized microbial populations within 60 seconds. The results showed that the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Curcuma zedoaria; Mouthrinse; Antimicrobial activity; Logarithmic reduction.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000300011

Screening for antimicrobial activity among bacteria isolated from the Amazon Basin
Provedor de dados: 58
Autores: Motta,Amanda S.; Cladera-Olivera,Florencia; Brandelli,Adriano.
Bacteria producing antimicrobial activity were identified among 86 isolates from aquatic environments of Brazilian Amazon Basin. Antimicrobial activity against at least one indicator strain was detected for 59 isolates (68.6%). Inhibitory activity was mostly against Gram-positive bacteria, such as Listeria monocytogenes and Bacillus cereus. The antimicrobial substances produced by 19 strains that showed higher inhibitory activity were partially characterized. These antimicrobial substances showed thermal resistance for up to 100°C and partial resistance to proteolytic treatment. Some antimicrobials were partially resistant to pronase E at 2 mg ml-1 or to treatment with trichloroacetic acid. Detection of antimicrobial activity on polyacrylamide gels...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; Listeria monocytogenes; Bacteriocins; Amazon Basin.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000300007

The potential of an Aspergillus fumigatus Brazilian strain to produce antimicrobial secondary metabolites
Provedor de dados: 58
Autores: Furtado,Niege Araçari Jacometti Cardoso; Fonseca,Maria José Vieira; Bastos,Jairo Kenupp.
During the course of screening for biologically leading active natural products from fungi, a strain of Aspergillus fumigatus was assessed for antimicrobial activity production. Four parameters consisting of medium culture, pH, temperature and time of fermentation were investigated. The extracts from the fungus cultures displayed different TLC profiles and produced, at least, one inhibition zone in the bioautography assays. Overlapping inhibition zones in the range of Rf 0.09 to 0.65 against Kocuria rhizophila were detected in the bioautography assay of the chloroform extract obtained from Jackson's medium culture, initial pH of 6.0 and incubation at 40ºC for 144 hours. However, the obtained extracts by developing the fungus culture in Vogel's medium...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; Aspergillus fumigatus; Bioautography; Fermentation conditions.
Ano: 2005
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822005000400010

Phytochemical screening and antimicrobial activity of roots of Murraya koenigii (Linn.) Spreng. (Rutaceae)
Provedor de dados: 58
Autores: Vats,Manisha; Singh,Harneet; Sardana,Satish.
Murraya koenigii, family Rutaceae, commonly known as Curry leaf plant is a highly valued plant for its medicinal value and characteristic aroma. The plant is a rich source of carbazole alkaloids. The petroleum ether, chloroform, ethyl acetate and ethanol extracts of roots of the plant were screened for phytochemical properties and antimicrobial activity for Staphylococcus aureus, Micrococcus luteus, Bacillus subtilis, Escherichia coli, Pseudomonas aeruginosa, Candida albicans and Aspergillus niger. Phytochemical screening showed the presence of carbohydrates, alkaloids, steroids and flavonoids in the root extracts of the plant. The study shows that all the extracts possess remarkable antibacterial activity. Additionally, petroleum ether and chloroform...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Murraya koenigii; Rutaceae; Phytochemical screening; Antimicrobial activity.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000400044

Characterization and antimicrobial performance of nano silver coatings on leather materials
Provedor de dados: 58
Autores: Lkhagvajav,N.; Koizhaiganova,M.; Yasa,I.; Çelik,E.; Sari,Ö.
In this study, the characterization and the antimicrobial properties of nano silver (nAg) coating on leather were investigated. For this purpose, turbidity, viscosity and pH of nAg solutions prepared by the sol-gel method were measured. The formation of films from these solutions was characterized according to temperature by Differential Thermal Analysis-Thermogravimetry (DTA-TG) equipment. The surface morphology of treated leathers was observed using Scanning Electron Microscopy (SEM). The antimicrobial performance of nAg coatings on leather materials to the test microorganisms as Escherichia coli, Staphylococcus aureus, Candida albicans and Aspergillius niger was evaluated by the application of qualitative (Agar overlay method) and quantitative...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nano Ag; Antimicrobial activity; Lining leather; Coating.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000100041

Microbiological quality and other characteristics of refrigerated chicken meat in contact with cellulose acetate-based film incorporated with rosemary essential oil
Provedor de dados: 58
Autores: Melo,Adriane Alexandre Machado de; Geraldine,Robson Maia; Silveira,Miriam Fontes Araujo; Torres,Maria Célia Lopes; Rezende,Cíntia Silva Minafra e; Fernandes,Thiago Henrique; Oliveira,Antonio Nonato de.
Antimicrobial active packaging delays or inhibits microorganism growth in packed products, and it can be used in a variety of food systems. The objective of the present research was to develop packaging incorporated with natural antimicrobial agents (active film). The effects of the active film on the spoilage, pathogenic microorganism counts, pH and color of the refrigerated chicken breast cuts were analyzed. Cellulose acetate-based active films incorporating two concentrations (20% and 50%, v/w) of rosemary (Rosmarinus officinalis L.) essential oil were manufactured and placed in contact with the chicken breast cuts for six days. An analysis of variance and mean comparison tests (Tukey's test, p&lt;0.05) were performed on the results. The films that...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Active packaging; Antimicrobial activity; Cellulose acetate; Rosmarinus officinalis L.; Chicken.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000400025

Evaluation of a lipopeptide biosurfactant from Bacillus natto TK-1 as a potential source of anti-adhesive, antimicrobial and antitumor activities
Provedor de dados: 58
Autores: Cao,Xiao-Hong; Liao,Zhen-Yu; Wang,Chun-Ling; Yang,Wen-Yan; Lu,Mei-Fang.
A lipopeptide biosurfactant produced by Bacillus natto TK-1 has a strong surface activity. The biosurfactant was found to be an anti-adhesive agent against several bacterial strains, and also showed a broad spectrum of antimicrobial activity. The biosurfactant induced a significant reduction in tumor cells viability in a dose- dependent manner.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Biosurfactant; Anti-adhesive; Antimicrobial activity; Antitumor.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000200030

Comparative study of antibacterial and antifugal activity of callus culture and adult plants extracts from Alternanthera maritima (Amaranthaceae)
Provedor de dados: 58
Autores: Salvador,Marcos J.; Pereira,Paulo S.; França,Suzelei C.; Candido,Regina C.; Ito,Izabel Y.; Dias,Diones A.
The aim of this study was to evaluate the antibacterial and antifungal activity of callus culture (two different hormonal combination culture medium) and adult plants (two collect) extracts from Alternanthera maritima (Amaranthaceae) investigating the maintenance of antimicrobial activity in vivo and in vitro. The antibacterial and antifungal activity was determined by the agar-well diffusion method against thirty strains of microorganisms including Gram-positive and Gram-negative bacteria, yeasts and dermatophytes. All the organic crude extracts studied were bioactive. Extracts of aerial parts and roots of adult plants collected during the same period of years of 1995 and 1998 (Restinga de Maricá (RJ), collect 1 and 2) inhibited the growth of several...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alternanthera maritima; Adult plants; Callus culture; Biotechnology; Antimicrobial activity.
Ano: 2004
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822004000100022

Antimicrobial activities of six essential oils commonly used as condiments in Brazil against Clostridium perfringens
Provedor de dados: 58
Autores: Radaelli,Marcela; Silva,Bárbara Parraga da; Weidlich,Luciana; Hoehne,Lucélia; Flach,Adriana; Costa,Luiz Antonio Mendonça Alves da; Ethur,Eduardo Miranda.
Abstract Despite recent advances in food production technology, food-borne diseases (FBD) remain a challenging public health concern. In several countries, including Brazil, Clostridium perfringens is among the five main causative agents of food-borne diseases. The present study determines antimicrobial activities of essential oils of six condiments commonly used in Brazil, viz., Ocimum basilicum L. (basil), Rosmarinus officinalis L. (rosemary), Origanum majorana L. (marjoram), Mentha × piperita L. var. Piperita (peppermint), Thymus vulgaris L. (thyme) and Pimpinella anisum L. (anise) against C. perfringens strain A. Chemical compositions of the oils were determined by GC–MS (gas chromatography–mass spectrometry). The identities of the isolated compounds...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Food-borne disease; Antimicrobial activity; Clostridium perfringens; Spices; Essential oils.
Ano: 2016
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822016000200424

Antimicrobial activity evaluation and comparison of methods of susceptibility for Klebsiella pneumoniae carbapenemase (KPC)-producing Enterobacter spp. isolates
Provedor de dados: 58
Autores: Rechenchoski,Daniele Zendrini; Dambrozio,Angélica Marim Lopes; Vivan,Ana Carolina Polano; Schuroff,Paulo Alfonso; Burgos,Tatiane das Neves; Pelisson,Marsileni; Perugini,Marcia Regina Eches; Vespero,Eliana Carolina.
Abstract The production of KPC (Klebsiella pneumoniae carbapenemase) is the major mechanism of resistance to carbapenem agents in enterobacterias. In this context, forty KPC-producing Enterobacter spp. clinical isolates were studied. It was evaluated the activity of antimicrobial agents: polymyxin B, tigecycline, ertapenem, imipenem and meropenem, and was performed a comparison of the methodologies used to determine the susceptibility: broth microdilution, Etest® (bioMérieux), Vitek 2® automated system (bioMérieux) and disc diffusion. It was calculated the minimum inhibitory concentration (MIC) for each antimicrobial and polymyxin B showed the lowest concentrations for broth microdilution. Errors also were calculated among the techniques, tigecycline and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; Enterobacter spp.; KPC; Methods of susceptibility.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000300509

Biological activities of a mixture of biosurfactant from Bacillus subtilis and alkaline lipase from Fusarium oxysporum
Provedor de dados: 58
Autores: Quadros,Cedenir Pereira de; Duarte,Marta Cristina Teixeira; Pastore,Gláucia Maria.
In this study, we investigate the antimicrobial effects of a mixture of a biosurfactant from Bacillus subtilis and an alkaline lipase from Fusarium oxysporum (AL/BS mix) on several types of microorganisms, as well as their abilities to remove Listeria innocua ATCC 33093 biofilm from stainless steel coupons. The AL/BS mix had a surface tension of around 30 mN.m-1, indicating that the presence of alkaline lipase did not interfere in the surface activity properties of the tensoactive component. The antimicrobial activity of the AL/BS mix was determined by minimum inhibitory concentration (MIC) micro-assays. Among all the tested organisms, the presence of the mixture only affected the growth of B. subtilis CCT 2576, B. cereus ATCC 10876 and L. innocua. The...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; Listeria innocua; Microbial biofilm; Minimum inhibitory concentration; Stainless steel surface.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822011000100045

Effects of Myrcia ovata Cambess. essential oil on planktonic growth of gastrointestinal microorganisms and biofilm formation of Enterococcus faecalis
Provedor de dados: 58
Autores: Cândido,Cinthya S.; Portella,Cadmo Silton A.; Laranjeira,Bruno J.; Silva,Sérgio S. da; Arriaga,Angela M.C.; Santiago,Gilvandete M. P.; Gomes,Geovany A.; Almeida,Paulo César; Carvalho,Cibele B. M.
The essential oil from the leaves of Myrcia ovata Cambess., commonly used in Brazil for the treatment of gastric illnesses, was screened for antimicrobial activity and action in the formation of microbial biofilms by Enterococcus faecalis. The oil was obtained by hydrodistillation using a clevenger-type system. Its chemical composition was analyzed using GC and GC-MS. Both MIC and MBC of the essential oil were determined by broth microdilution techniques and agar dilution method. The essential oil showed antimicrobial activity against E. faecalis, Escherichia coli, Pseudomonas aeruginosa, Salmonella choleraesuis, Staphylococcus aureus, Streptococcus pneumoniae and Candida parapsilosis. The results showed that the essential oil of M. ovata Cambess. was...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Essential oil; Myrcia ovata Cambess.; Antimicrobial activity; Biofilms.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000300012

Sensitivity of spoiling and pathogen food-related bacteria to Origanum vulgare L. (Lamiaceae) essential oil
Provedor de dados: 58
Autores: Souza,Evandro Leite de; Stamford,Tânia Lúcia Montenegro; Lima,Edeltrudes de Oliveira.
Origanum vulgare L. (oregano), Lamiaceae, has been known as plant specie with prominent biological properties for a long time. This study aimed to evaluate the antibacterial activity of Origanum vulgare essential oil on various Gram-positive and Gram-negative spoiling and/or pathogen food-related bacteria, as well as to observe its antimicrobial effectiveness in a food conservation micromodel. The results showed a strong antibacterial activity of the assayed essential oil noted by large growth inhibition zones (30-37 mm). MIC values were between 20-40 µL/mL for the most bacteria strains. Essential oil was able to cause significant (P&lt;0.05) inhibitory effect on the bacteria viability providing a bacteriostatic effect after 24hours of exposure. In...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Origanum vulgare L.; Essential oil; Antimicrobial activity; Bacteria.
Ano: 2006
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000400023

Modulation of antimicrobial metabolites production by the fungus Aspergillus parasiticus
Provedor de dados: 58
Autores: Bracarense,Adriana A.P.; Takahashi,Jacqueline A.
Biosynthesis of active secondary metabolites by fungi occurs as a specific response to the different growing environments. Changes in this environment alter the chemical and biological profiles leading to metabolites diversification and consequently to novel pharmacological applications. In this work, it was studied the influence of three parameters (fermentation length, medium composition and aeration) in the biosyntheses of antimicrobial metabolites by the fungus Aspergillus parasiticus in 10 distinct fermentation periods. Metabolism modulation in two culturing media, CYA and YES was evaluated by a 2² full factorial planning (ANOVA) and on a 2³ factorial planning, role of aeration, medium composition and carbohydrate concentration were also evaluated. In...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Aspergillus parasiticus; Factorial planning; Metabolites diversification; Kojic acid; Antimicrobial activity.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000100045

Evaluation of the antimicrobial activity of crude extracts and isolated constituents from Chresta scapigera
Provedor de dados: 58
Autores: Schinor,Elisandra C.; Salvador,Marcos J.; Ito,Izabel Y.; Dias,Diones A.
Crude extracts and eight isolated compounds from Chresta scapigera were evaluated for antibacterial and antifungal activities by the agar-well diffusion method. Twenty strains, including Gram-positive and Gram-negative bacteria and yeasts were used in the bioassay. Hexane extracts presented the best results while ethanol extracts did not indicate inhibition of the microbial growth. Amongst the evaluated compounds b-amyrin acetate, tiliroside and luteolin showed the strongest antimicrobial effect.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Chresta scapigera; Flavonoids; Triterpenes; Antimicrobial activity.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000100030

Screening methods to determine antibacterial activity of natural products
Provedor de dados: 58
Autores: Valgas,Cleidson; Souza,Simone Machado de; Smânia,Elza F A; Smânia Jr.,Artur.
The emergence of new infectious diseases, the resurgence of several infections that appeared to have been controlled and the increase in bacterial resistance have created the necessity for studies directed towards the development of new antimicrobials. Considering the failure to acquire new molecules with antimicrobial properties from microorganisms, the optimization for screening methods used for the identification of antimicrobials from other natural sources is of great importance. The objective of this study was to evaluate technical variants used in screening methods to determine antibacterial activity of natural products. Thus, a varied range of natural products of plant, fungi and lichen origin were tested against two bacterial species,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agar diffusion; Antimicrobial activity; Bioautographic methods; Minimum inhibitory concentration; Minimum bactericidal concentration; Natural products.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000200034

The sensitivity of bacterial foodborne pathogens to Croton blanchetianus Baill essential oil
Provedor de dados: 58
Autores: Melo,Geiseanny Fernandes do Amarante; Costa,Ana Caroliny Vieira da; Garino Junior,Felício; Medeiros,Rosália Severo; Madruga,Marta Suely; Queiroga Neto,Vicente.
The aim of this study was to assess the activity of essential oil extracted from the leaves of C. blanchetianus Baill, popularly known as "marmeleiro", in inhibiting the growth and survival of pathogenic microorganisms in food by determining their survival in vitro and by observing the behaviour of Listeria monocytogenes inoculated into a food model (meat cubes) that was stored at refrigeration temperature (7 ± 1 ºC) for 4 days. The results indicated a bactericidal effect against Aeromonas hydrophila and Listeria monocytogenes and bacteriostatic action against Salmonella Enteritidis. A bacteriostatic effect on meat contaminated with L. monocytogenes was found for all concentrations of essential oils tested. These results showed that essential oil from the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Essential oil; Croton blanchetianus Baill; Antimicrobial activity; Foodborne microorganisms.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000400023

Rauvolfia grandiflora (Apocynaceae) extract interferes with staphylococcal density, enterotoxin production and antimicrobial activity
Provedor de dados: 58
Autores: Carlos,Lanamar de Almeida; Amaral,Kenas Aguiar da Silva; Vieira,Ivo José Curcino; Mathias,Leda; Braz-Filho,Raimundo; Samarão,Solange Silva; Vieira-da-Motta,Olney.
Staphylococci bacteria are involved in many human and animal infections and development of alternative antimicrobial drugs against pathogenic bacteria is of great interest to the pharmaceutical industry. This study investigated the in vitro effect of Rauvolfia grandiflora methanol extract (root bark fraction) (RGE) on the density of ATCC strains of Staphylococcus aureus and Staphylococcus epidermidis, and a clinical enterotoxin-producer, S. aureus bovine strain. The alkaloid, isoreserpiline, obtained from dichloromethane extract of R. grandiflora was ineffective against the strains tested. After incubation of staphylococci strains in the presence of 1.2 mg.mL-1 RGE, a significant inhibition of cell growth was observed using both spectrophotometry and ELISA...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rauvolfia grandiflora; Staphylococcus aureus; Enterotoxin; Antimicrobial activity.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000300011

Probiotic features of two oral Lactobacillus isolates
Provedor de dados: 58
Autores: Zavisic,Gordana; Petricevic,Sasa; Radulovic,Zeljka; Begovic,Jelena; Golic,Natasa; Topisirovic,Ljubisa; Strahinic,Ivana.
In this study, we checked lactobacilli strains of human origin for their potential as probiotic. Samples were collected from oral mucosa of 16 healthy individuals, out of which twenty isolates were obtained and two of them were selected and identified as Lactobacillus plantarum (G1) and L. casei (G3). Both isolates exhibited antagonistic action towards pathogenic microorganisms such as Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, Salmonella abony, and Clostridium sporogenes, but not on the growth of Candida albicans. The bacteriocin activity against Staphylococcus aureus ATCC 6358-P was shown only by L. plantarum G1. Moreover, the isolates G1 and G3 showed good viability in the acid gastric environment and in the gut environment...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lactobacillus; Antimicrobial activity; Hipolypemic effect.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000100050

Antimicrobial efficacy of secondary metabolites from Glomerella cingulata
Provedor de dados: 58
Autores: Hara Kishore,K.; Misra,Sunil; Ramesh Chandra,D.; Prakash,K.V.V. R.; Suryanarayana Murty,U.
Fungi are known to produce a vast array of secondary metabolites that are gaining importance for their biotechnological applications. Early reports suggest that G. cingulata has the capability to transform many compounds by various enzymatic actions. Therefore, the focus of this study was to determine the antibacterial and antifungal activity of crude ethyl acetate extract of G. cingulata using agar cup bioassay method. Crude extract of G. cingulata exhibited remarkable antifungal activity against Rhizopus oryzae, Chrysoporium tropicum and Beauveria bassiana but no antifungal activity was found against Alternaria tenuissima and Aspergillus niger at any concentrations. The crude extract presented no antibacterial activity against Gram positive and Gram...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; Glomerella cingulata; Agar cup bioassay.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000100031

Potential for biocontrol of melanized fungi by actinobacteria isolated from intertidal region of Ilha Do Mel, Paraná, Brazil
Provedor de dados: 58
Autores: Dalitz,Camila de Araújo; Porsani,Mariana Vieira; Figel,Izabel Cristina; Pimentel,Ida C.; Dalzoto,Patrícia R.
Abstract Actinobacteria occur in many environments and have the capacity to produce secondary metabolites with antibiotic potential. Identification and taxonomy of actinobacteria that produce antimicrobial substances is essential for the screening of new compounds, and sequencing of the 16S region of ribosomal DNA (rDNA), which is conserved and present in all bacteria, is an important method of identification. Melanized fungi are free-living organisms, which can also be pathogens of clinical importance. This work aimed to evaluate growth inhibition of melanized fungi by actinobacteria and to identify the latter to the species level. In this study, antimicrobial activity of 13 actinobacterial isolates from the genus Streptomyces was evaluated against seven...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Actinobacteria; Melanized fungi; Antimicrobial activity; 16S rDNA.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822017000100032

Polymeric micelles containing resveratrol: development, characterization, cytotoxicity on tumor cells and antimicrobial activity
Provedor de dados: 60
Autores: Almeida,Tamires Cunha; Seibert,Janaina Brandão; Almeida,Sávio Henrique de Souza; Amparo,Tatiane Roquete; Teixeira,Luiz Fernando de Medeiros; Barichello,Jose Mario; Postacchini,Bruna Bueno; Santos,Orlando David Henrique dos; Silva,Glenda Nicioli da.
Antimicrobial and antitumor activities of resveratrol, a compound found mainly in grapes, have already been demonstrated. However, its low bioavailability is a limiting factor for therapeutic application. Polymeric micelles can be an approach to solve this problem since they can encapsulate hydrophobic substances. We developed and characterized micellar formulations containing resveratrol and evaluated their cytotoxic and antimicrobial effects. The formulations were prepared by the cold dispersion method with different concentrations of F127 (5 or 10% w/w) and resveratrol (500 or 5000 µM). The formulations were characterized according to size, polydispersity index, pH, encapsulation rate and in vitro release. Cytotoxic effect was evaluated on a bladder...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; Cytotoxic activity; F127®; Polymeric micelles; Resveratrol.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100567

Antimicrobial and antibiofilm activities of phenolic compounds extracted from Populus nigra and Populus alba buds (Algeria)
Provedor de dados: 60
Autores: Nassima,Boumghar; Nassima,Behidj; Riadh,Ksouri.
The interest of this work is the discovery of new antimicrobial agents of plant origin to inhibit the formation of microbial biofilms. The present research was conducted to identify and quantify the phenolic compounds extracted from Populus nigra and Populus alba buds harvested in the area of Tizi-Ouzou (Algeria), and to evaluate their antimicrobial and antibiofilm activity. High performance liquid chromatography (HPLC) was performed to identify the phenolic compounds in the ethyl acetate fraction of P. nigra and the methanolic extracts of P. nigra and P. alba. The antimicrobial activity of the crude extracts and the fractions of these two species was tested against 11 microorganisms, using the disk diffusion method, while the antibiofilm effect of certain...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Populus nigra; Populus alba; HPLC; Polyphenols; Antimicrobial activity; Antibiofilm activity.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100563

In vitro antimicrobial activity of total extracts of the leaves of Petiveria alliacea L. (Anamu)
Provedor de dados: 60
Autores: Ochoa Pacheco,Ania; Marín Morán,Jorge; González Giro,Zenia; Hidalgo Rodríguez,Adrian; Mujawimana,Rachel Juliet; Tamayo González,Karel; Sariego Frómeta,Sandra.
The antimicrobial activity of 13 total extracts was evaluated, 10 soft extracts (B) and 3 blended extracts (E) prepared from dry and fresh leaves of Petiveria alliacea L. Various solvents were used for their preparation: hydroalcoholic solution at 30%, 80% and isopropyl alcohol. The antimicrobial effect of the extracts was tested by means of the method of Kirby-Bauer, using four bacterial strains from the ATCC collection (Escherichia coli, Staphylococcus aureus, Enterococcus faecalis and Pseudomonas aeruginosa) and a leveduriform fungus (Candida albicans). The following quality control parameters were determined for most active extracts: physical, physical-chemical and chemical parameters. The results were: nine extracts showed antibacterial activity,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antimicrobial activity; Anamu; Soft extracts; Blended extracts; Minimum Inhibitory Concentration.
Ano: 2013
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502013000200006

Antioxidant, antimicrobial and phytotoxic activities of Rhaponticum acaule DC. essential oil
Provedor de dados: 60
Autores: Mosbah,Habib; Sassi,Ahlem Ben; Chahdoura,Hassiba; Snoussi,Mejdi; Flamini,Guido; Achour,Lotfi; Selmi,Boulbaba.
The in-vitro antioxidant activity of Rhaponticum acaule essential oil (RaEO) was evaluated using β-carotene/linoleic acid bleaching, chelating activity, and lipid peroxidation inhibition (TBARS) assays. The antimicrobial activity of RaEO was assessed by disc diffusion and microdilution methods against 8 bacteria and 4 yeast. Finally, the allelopathic activity of RaEO on the seed germination and the shoot and root elongation of lettuce (Lactuca sativa L.) seedlings were investigated. According to our results, the RaEO exhibited significant antioxidant activity, similar to those of standards (BHT and ascorbic acid) with IC50 values of 0.042 and 0.045 mg/mL obtained by β-carotene bleaching and TBARS assays, respectively. On the other hand, despite its...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Rhaponticum acaule essential oil; Antioxidant activity; Antimicrobial activity; Allelopathic activity.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100611

Pathogen control using a natural Chilean bee pollen extract of known botanical origin
Provedor de dados: 118
Autores: Cabrera,Carol; Montenegro,Gloria.
Bee pollen is a product from beehives that is contained in corbiculae, generally monospecific and is currently considered as a functional food due to its nutritional and medicinal properties. This study investigates the antimicrobial activity of a Chilean bee pollen extract of known botanical origin. The botanical origin of the pollen was determined by palynological analysis, and then an aqueous extract was prepared. The antibacterial properties of the extract were evaluated on human infectious agents (Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus and Streptococcus pyogenes) using a qualitative method (agar diffusion) and a quantitative method (minimum inhibitory and bactericide concentration) and on agricultural pathogens (Alternaria...
Tipo: Journal article
Palavras-chave: Antimicrobial activity; Bee pollen; Aqueous extract.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202013000100020

Agro-industrial wastes as sources of bioactive compounds for food and fermentation industries
Provedor de dados: 65
Autores: Shirahigue,Ligianne Din; Ceccato-Antonini,Sandra Regina.
ABSTRACT: Agro-industrial wastes are of great interest because they are important natural sources of bioactive compounds and can generate value-added byproducts. Recent studies have shown that byproducts generated by the food processing industry are rich in bioactive compounds, such as phenolic compounds, organic acids, and carotenoids, among others. The growing interest in replacing synthetic antioxidant and antimicrobial compounds with natural ones has stimulated a search for these bioactive compounds from plant sources, especially from fruit-processing wastes. The study aims to project the agro-industrial wastes as potential natural sources of antioxidants and antimicrobials and the feasible technological applications in food and fermentation...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenolic compounds; Antioxidant activity; Antimicrobial activity; Agro-industrial waste.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782020000400754

Antimicrobial activity and chemical constituents of essential oils and oleoresins extracted from eight pepper species
Provedor de dados: 65
Autores: Martinelli,Laira; Rosa,Jessica Miranda; Ferreira,Carolina dos Santos Bragine; Nascimento,Gustavo Marcelo da Luz; Freitas,Mateus Silveira; Pizato,Luiz Carlos; Santos,Wanderson de Oliveira; Pires,Ricardo Francisco; Okura,Mônica Hitomi; Malpass,Geoffroy Roger Pointer; Granato,Ana Claudia.
ABSTRACT: Essential oils are the most important compounds produced during secondary metabolism in aromatic plants. Essential oils are volatile, have characteristic odor and are used as defensive agents by plants. In pepper, it is possible to say that essential oils are the “flavor fingerprint” of each species. In the present article, eight species of pepper were studied in order to extract their essential oils and oleoresins, test their antibacterial and antifungal activities and also to identify the compounds present in the most bioactive samples. Results demonstrated that two essential oils [Pimenta dioica (L.) Merr. and Schinus terebinthifolius] and three oleoresins (Schinus terebinthifolius and Piper nigrum white and black) recorded significant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Peppers; Essential oil; Oleoresins; Antimicrobial activity; GC-MS.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782017000500451

Application of active films with natural extract for beef hamburger preservation
Provedor de dados: 65
Autores: Lagos,Maria Jeannine Bonilla; Sobral,Paulo José do Amaral.
ABSTRACT: Edible chitosan-based films, in pure form (CH100), or blended with gelatin (GEL50:CH50), with and without boldo extract (B) were prepared. The oxygen permeability of the films, as well as color changes and antioxidant and antimicrobial activities on beef hamburgers samples were evaluated. CH100+B film exhibited optimal oxygen barrier properties (6.40±0.170cc-mL/[m²-day]), and this value was significantly increased in blended films (GEL50:CH50+B = 12.99±1.50cc-mL/[m²-day]) (P&lt;0.05). All films provoked color changes in hamburger samples during storage, and the samples covered with CH100+B film showed a lower brightness and a higher redness. All films effectively protected beef hamburger from lipid oxidation, and boldo extract incorporation in...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Beef hamburger; Active-edible films; Natural extract; Antimicrobial activity; Lipid oxidation; Preservation.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000100752

Enzymatic hydrolysis (pepsin) assisted by ultrasound in the functional Properties of hydrolyzates from different collagens
Provedor de dados: 65
Autores: Vidal,Alessandra Roseline; Cechin,Carine da Fonseca; Cansian,Rogério Luis; Mello,Renius de Oliveira; Schmidt,Michele Mantelli; Demiate,Ivo Mottin; Kempka,Aniela Pinto; Dornelles,Rosa Cristina Prestes.
ABSTRACT: Enzymatic hydrolysis (pepsin) assisted with or without ultrasound in the functional properties of hydrolyzates from different collagens were analyzed. Degree of hydrolysis, antioxidant activity (DPPH) and antimicrobial activity (MIC) were assessed. The treatment that resulted in greater antioxidant activity for the fiber sample was with the use of 4% of enzyme and concomitant ultrasound (40.7%), leading to a degree of hydrolysis of 21.7%. For the powdered fiber sample the hydrolysis treatment with use of 4% of enzyme resulted in lower protein content (6.97mg/mL), higher degree of hydrolysis (19.9%) and greater antioxidant activity (38.6%). The hydrolyzates showed inhibitory capacity against gram-negative bacteria Salmonella choleraesuis and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pepsin; Degree of hydrolysis; Antioxidant activity; Antimicrobial activity; Ultrasound.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782018000300752