Consulta: subjectFacets:"Antibacterial"
Registros recuperados: 26
Data/hora: 01/06/2024 09:27:51

Cytotoxic and antibacterial properties of Mytilus galloprovincialis, Ostrea edulis and Crassostrea gigas (bivalve molluscs) hemolymph
Provedor de dados: 5
Autores: Hubert, Florence; Van Der Knaap, Wil; Noel, Thierry; Roch, Philippe.
Mussel (Mytilus galloprovincialis) plasma contains cytotoxic activity against both vertebrate (erythrocytes and mouse tumour) and protozoan cells. Procaryotes (Escherichia coli and Vibrio alginolyticus) were not sensitive to the cytotoxicity. The activity was still present in dialyzed samples but was inhibited by heating at 45°C. Large individual variability which was not correlated with protein concentration and an increasing number of reactive specimens following injection, suggested that naive mussels were in various stages of immune response. Purification by anion exchange chromatography followed by gel filtration revealed a 320 kDa cytotoxic polymeric protein that acts through a polymerization process after binding onto target cell membranes as...
Tipo: Text
Palavras-chave: Cytotoxicité; Antibactérien; Hémolymphe; Lysat d'hémocyte; Moule; Huître; Mytilus galloprovincialis; Ostrea edulis; Crassostrea gigas; Cytotoxicity; Antibacterial; Hemolymph; Hemocyte lysate; Musssel; Oyster; Mytilus galloprovincialis; Ostrea edulis; Crassostrea gigas.
Ano: 1996
URL: http://archimer.ifremer.fr/doc/00039/15008/12333.pdf

New Sulfur-Containing Polyarsenicals from the New Caledonian Sponge Echinochalina bargibanti
Provedor de dados: 5
Autores: Tahtinen, Petri; Guella, Graziano; Saielli, Giacomo; Debitus, Cecile; Hnawia, Edouard; Mancini, Ines.
Arsenicin A (C3H6As4O3) was isolated from the New Caledonian poecilosclerid sponge Echinochalina bargibanti, and described as the first natural organic polyarsenic compound. Further bioguided fractionation of the extracts of this sponge led us to isolate the first sulfur-containing organic polyarsenicals ever found in Nature. These metabolites, called arsenicin B and arsenicin C, are built on a noradamantane-type framework that is characterized by an unusual As-As bonding. Extensive NMR measurements, in combination with mass spectra, enabled the assignment of the structure for arsenicin B (C3H6As4S2) as 2. The scarcity of arsenicin C and its intrinsic chemical instability only allowed the collection of partial spectral data, which prevented the full...
Tipo: Text
Palavras-chave: Antibacterial; Arsenical; Calculated NMR spectrum; Density functional theory; Natural products; NMR spectroscopy; Structure elucidation; Sulfur metabolite.
Ano: 2018
URL: https://archimer.ifremer.fr/doc/00469/58051/72242.pdf

Antimicrobial Compounds from Eukaryotic Microalgae against Human Pathogens and Diseases in Aquaculture
Provedor de dados: 5
Autores: Falaise, Charlotte; Francois, Cyrille; Travers, Marie-agnes; Morga, Benjamin; Haure, Joel; Tremblay, Rejean; Turcotte, Francois; Pasetto, Pamela; Gastineau, Romain; Hardivillier, Yann; Leignel, Vincent; Mouget, Jean-luc.
The search for novel compounds of marine origin has increased in the last decades for their application in various areas such as pharmaceutical, human or animal nutrition, cosmetics or bioenergy. In this context of blue technology development, microalgae are of particular interest due to their immense biodiversity and their relatively simple growth needs. In this review, we discuss about the promising use of microalgae and microalgal compounds as sources of natural antibiotics against human pathogens but also about their potential to limit microbial infections in aquaculture. An alternative to conventional antibiotics is needed as the microbial resistance to these drugs is increasing in humans and animals. Furthermore, using natural antibiotics for...
Tipo: Text
Palavras-chave: Biological activity; Antimicrobial; Antibacterial; Antifungal; Antiviral; Biological activity; Haslea; Microalgae; Sustainable aquaculture.
Ano: 2016
URL: http://archimer.ifremer.fr/doc/00349/46052/45719.pdf

In-Vitro Antibacterial and Antifungal Effects of High Levels of Chinese Star Anise
Provedor de dados: 89
Autores: Alhajj,MS; Qasem,MAA; Nabi,AR Jar El; Al-Mufarrej,SI.
ABSTRACT This study investigated the in-vitro antibacterial and fungicidal activities of three crude extracts of Illicium verum (absolute methanol, 50% methanol and aqueous extracts) against two Gram-positive bacteria (Staphylococcus aureus and Listeria monocytogenes), two Gram-negative bacteria (Escherichia coli and Salmonella Arizona), and two fungi (Aspergillus fumigatus and Aspergillus niger). The antibacterial action was measured using an agar disk diffusion test, and the minimum inhibitory concentrations (MICs) and minimum bactericidal concentrations (MBCs) were determined. The fungicidal activity of the star anise extracts was assessed by the agar disk diffusion test, and poisoned food techniques, and the MICs and minimum fungicidal concentrations...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Illicium verum; Antibacterial; Antifungal.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2019000100330

Milk quality parameters associated with the occurrence of veterinary drug residues in bulk tank milk
Provedor de dados: 63
Autores: Picinin,Lidia Cristina Almeida; Toaldo,Isabela Maia; Hoff,Rodrigo Barcellos; Souza,Fernando Nogueira; Leite,Mônica Oliveira; Fonseca,Leorges Moraes; Diniz,Soraia Araújo; Silva,Marcos Xavier; Haddad,João Paulo Amaral; Cerqueira,Mônica Maria Oliveira Pinho; Bordignon-Luiz,Marilde Terezinha.
ABSTRACT Veterinary drug residues in bulk tank milk are important to all sectors of the dairy chain because they are one of the major factors which determine the safety of the final product. This study attempted to identify milk quality parameters that are associated with the occurrence of veterinary drug residues using multivariate principal component analysis (PCA). A total of 132 raw milk samples were collected from 45 dairy farms in the state of Minas Gerais - Brazil and analyzed for 42 analytes, including pyrethroids, macrocyclic lactones and antibacterials, using liquid chromatography coupled with mass spectrometry in tandem mode and gas chromatography with electron capture detection. Out of the 132 milk samples, 40 samples tested positive for at...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Pesticide; Anthelmintic; Antibacterial; Macrocyclic lactone; Food safety.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-90162017000300195

Antimicrobial activity of honeys from two stingless honeybee species and Apis mellifera (Hymenoptera: Apidae) against pathogenic microorganisms
Provedor de dados: 36
Autores: Cruz,Carolinie Batista Nobre da; Pieri,Fabio Alessandro; Carvalho-Zilse,Gislene Almeida; Orlandi,Patrícia Puccinelli; Nunes-Silva,Carlos Gustavo; Leomil,Luciana.
Honeys are described possessing different properties including antimicrobial. Many studies have presented this activity of honeys produced by Apis mellifera bees, however studies including activities of stingless bees honeys are scarce. The aim of this study was to compare the antimicrobial activity of honeys collected in the Amazonas State from Melipona compressipes, Melipona seminigra and Apis mellifera against Staphylococcus aureus, Enterococcus faecalis, Escherichia coli, Chromobacterium violaceum, and Candida albicans. Minimum inhibitory concentrations were determined using the agar dilution method with Müller-Hinton agar (for bacteria) or Saboraud agar (for yeast). Staphylococcus aureus and E. faecalis were inhibited by all honeys at concentrations...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Melipona; Antibacterial; Antifungal; Natural products; Functional food.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672014000200015

Antimicrobial activity of bergenin from Endopleura uchi (Huber) Cuatrec
Provedor de dados: 36
Autores: Silva,Saulo L. da; Oliveira,Viviane Guedes de; Yano,Tomomasa; Nunomura,Rita de Cássia Saraiva.
Endopleura uchi (Huber) Cuatrec. is an Amazon species traditionally used as treatment for inflammations and female disorders. Bergenin was isolated from ethyl acetate fraction of bark of E. uchi by using column chromatography over sephadex LH-20 and then silica gel 60 flash. Its structure was identified on the basis of its NMR spectra. The antimicrobial activity of bergenin and fractions of methanol extract of E. uchi were evaluated against ATCC microorganisms (Escherichia coli, Salmonella enteritidis, Pseudomonas aeruginosa, Enterococcus faecalis, Staphylococcus aureus, Candida albicans, C. guilliermondii, Aspergillus flavus, A. nidulans). Clinically isolated strains of all of these microorganisms, along with C. tropicalis, A. niger, Shigella sonnei,...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antibacterial; Antifungal; Candida; Humiriaceae; Uxi-amarelo.
Ano: 2009
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0044-59672009000100019

Evaluation of in vitro biological properties of Senna occidentalis (L.) Link
Provedor de dados: 3
Autores: Lombardo, Márcia; Kiyota, Sumika; Kato, Edna Tomiko Miyake; Mathor, Monica Beatriz; Pinto, Terezinha de Jesus Andreoli; Kaneko, Telma Mary.
Senna species have been widely used by American, African and Indian ethic groups mainly in the treatment of feebleness, constipation, liver disorders and skin infections. Senna occidentalis (L.) Link is a perennial shrub native to South America and indigenous to tropical regions throughout the world. Current study evaluated the antimicrobial activity of aqueous and hydroalcoholic extracts from S. occidentalis prepared from different parts of the plant. Antimicrobial activity was assessed against standard pharmaceutical microorganisms by spectrophotometry and microdilution technique. Escherichia coli was sensitive only to compounds extracted from seeds which may be proteinaceous. A broader antimicrobial spectrum was demonstrated by the hydroalcoholic...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 2.10.06.00-8 Cassia occidentalis; Leguminosae; Traditional medicine; Antibacterial; Antifungal; Fibroblasts Etnofarmacologia.
Ano: 2015
URL: http://periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/22525

Cytotoxicity and bacterial membrane destabilization induced by Annona squamosa L. extracts
Provedor de dados: 42
Autores: PINTO,NÍCOLAS C.C.; SILVA,JUCÉLIA B.; MENEGATI,LAURA M.; GUEDES,MARIA CLARA M.R.; MARQUES,LUCAS B.; SILVA,THIAGO P. DA; MELO,ROSSANA C.N. DE; SOUZA-FAGUNDES,ELAINE M. DE; SALVADOR,MARCOS J.; SCIO,ELITA; FABRI,RODRIGO L.
ABSTRACT This study aimed to further investigate the cytotoxicity against tumor cell lines and several bacterial strains of Annona squamosa and its mode of action. Methanol extracts of A. squamosa leaves (ASL) and seeds (ASS) were used. ASL showed significant antibacterial activity against S. aureus, K. pneumoniae and E. faecalis with MIC values of 78, 78 and 39 µg/mL respectively. Moreover, ASL exhibited significant biofilm disruption, rapid time dependent kinetics of bacterial killing, increased membrane permeability and significantly reduced the cell numbers and viability. Regarding the cytotoxicity against tumor cell lines, ASS was more active against Jurkat and MCF-7 cells, with CI50 1.1 and 2.1 µg/mL, respectively. ASL showed promising activity...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Alkaloids; Annona squamosa; Antibacterial; Citotoxicity; Herbal medicine.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502053

A comparative study of phytoconstituents and antibacterial activity of in vitro derived materials of four Passiflora species
Provedor de dados: 42
Autores: J. SIMÃO,MARIELA; J.S. BARBOZA,THIAGO; G. VIANNA,MARCELA; GARCIA,RENATA; MANSUR,ELISABETH; P.R. IGNACIO,ANA CLAUDIA; PACHECO,GEORGIA.
Abstract Passiflora species are well known for their common use in popular medicine for the treatment of several diseases, such as insomnia, anxiety, and hysteria, in addition to their anti-inflammatory, antioxidant, analgesic and antibacterial potential. However, few data about the chemical composition and the medicinal potential of in vitro derived materials are available. Therefore, the goal of this work was to compare, for the first time, the phytoconstituents of in vitro derived materials of four Passiflora species, and evaluate the antibacterial potential of their extracts against 20 Gram-positive and negative strains. Chromatographic analysis indicated the presence of saponins in roots extracts from all studied species, whereas leaf extracts...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antibacterial; Chromatography; Flavonoids; Passiflora; Saponins.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000602805

Antibacterial activity of Lamiaceae plant extracts in clinical isolates of multidrug-resistant bacteria
Provedor de dados: 42
Autores: ASSIS,FELIPE V. DE; SIQUEIRA,FLÁVIA L.; GONÇALVES,ISABELA E.; LACERDA,RAFAEL P.; NASCIMENTO,RAFAELA A.; ARAÚJO,STHÉFANE G.; ANDRADE,JÉSSICA T.; HERRERA,KARINA M.S.; LIMA,LUCIANA A.R.S.; FERREIRA,JAQUELINE M.S.
ABSTRACT The antibacterial activity of plant extracts of the Lamiaceae family was evaluated against clinical isolates of multi-resistant Gram-negative bacteria by broth microdilution technique. Promising results were obtained considering that all extracts were active for at least two bacterial species with MIC ranging from 0.5 to 2.0 mg/mL.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antibacterial; Clinical isolates; Lamiaceae extracts; Multidrug-resistant.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401665

Antibacterial and cytotoxicity activities and phytochemical analysis of three ornamental plants grown in Mexico
Provedor de dados: 42
Autores: RÍOS-CHÁVEZ,PATRICIA; PEREZ-GONZALEZ,JORDY; SALGADO-GARCIGLIA,RAFAEL; RAMÍREZ-CHÁVEZ,ENRIQUE; MOLINA-TORRES,JORGE; MARTINEZ-TRUJILLO,MIGUEL; CARREON-ABUD,YAZMIN.
Abstract: This study evaluates the antibacterial, cytotoxic activities, and phytochemical composition, of Callistemon citrinus, Hibiscus rosa-sinensis and Plumbago auriculata leaves and flowers, three ornamental plants in Mexico. However, in other countries offers a range of other uses. Ethanol extracts of C. citrinus leaf and flower presented stronger antibacterial activity than the extracts obtained from the other two plants. C. citrinus leaf showed low cytotoxicity (LC50 &lt;600 µg/mL) on the brine shrimp test, whereas the ethanol extracts of H. rosa-sinensis and P. auriculata leaves showed no cytotoxic activity. Flower extracts obtained from the three plants did no exhibit cytotoxicity. GC-MS analysis revealed that the ethanol extract of P. auriculata...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antibacterial; Artemia salina; Callistemon citrinus; Cytotoxic; Lupeol.
Ano: 2019
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000300611

Melipona mondury produces a geopropolis with antioxidant, antibacterial and antiproliferative activities
Provedor de dados: 42
Autores: SANTOS,TÁSSIA L.A. DOS; QUEIROZ,RAPHAEL F.; SAWAYA,ALEXANDRA C.H.F.; LOPEZ,BEGOÑA GIMENEZ-CASSINA; SOARES,MILENA B.P.; BEZERRA,DANIEL P.; RODRIGUES,ANA CAROLINA B.C.; PAULA,VANDERLÚCIA F. DE; WALDSCHMIDT,ANA MARIA.
ABSTRACT Geopropolis is a special type of propolis produced by stingless bees. Several pharmacological properties have been described for different types of geopropolis, but there have been no previous studies of the geopropolis from Melipona mondury. In this study, we investigated the antioxidant, antibacterial, and antiproliferative activities of M. mondury geopropolis, and determined its chemical profile. The antioxidant activity was determined using in vitro ABTS·+, ·DPPH, and β-carotene/linoleic acid co-oxidation methods. The antibacterial activity was determined using a microdilution method with Pseudomonas aeruginosa, Staphylococcus aureus, and methicillin-resistant S. aureus. The antiproliferative effect was determined in tumor cell lines using the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antibacterial; Antioxidant; Antiproliferative; Geopropolis; Melipona mondury.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000502247

Antimicrobial profile screening of two oils of Copaifera genus
Provedor de dados: 45
Autores: Pieri,F.A.; Silva,V.O.; Souza,C.F.; Costa,J.C.M.; Santos,L.F.; Moreira,M.A.S.
O objetivo deste estudo foi identificar a atividade inibitória de óleos de copaíba sobre o crescimento dos micro-organismos: Shigella flexneri, Klebsiella pneumoniae, Escherichia coli, Proteus mirabilis, Pseudomonas aeruginosa, Citrobacter freundi, Staphylococcus aureus, Actinobacillus pleuropneumoniae e Haemophilus parasuis. Foi realizado um teste de difusão em ágar com duas soluções a 10% de óleos de copaíba obtidos de duas diferentes espécies de copaíba (Copaifera officinalis e C. langsdorffii) e um controle negativo com tween 80 e água. Os isolados clínicos de H. parasuis e A. pleuropneumoniae foram incubados em microaerofilia. Os resultados mostraram três espécies Gram-negativas inibidas por ambas as soluções de óleo de copaíba: E. coli, P. aeruginosa...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phytotherapics; Antimicrobial; Antibacterial; Copaifera.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352012000100037

Antioxidant, Antibacterial activity and Brine shrimp toxicity test of some Mountainous Lichens from Nepal
Provedor de dados: 48
Autores: Paudel,Babita; Datta Bhattarai,Hari; Prasad Pandey,Durga; Seoun Hur,Jae; Gyu Hong,Soon; Kim,Il-Chan; Han Yim,Joung.
A total of twenty four lichen species belonging to six families were collected from mountainous region of Nepal. The methanol extracts of each species were tested for antimicrobial and antioxidant activitiesin vitro. It was found that extracts of twenty one lichen species were active againstB. subtilis and seven species were active againstS. aureus. Similarly, in DPPH assay, three speciesPeltigera sp.,Cladonia sp., andCanoparmelia sp. showed comparable activity with commercial standard, BHA. In ABTS+ assay, extracts ofParmoterma sp.,Ramalina sp.,Peltigera sp. andCladonia sp. showed stronger activity than ascorbic acid. The observed data after comparison with previously published reports indicated that the high altitude lichens contain stronger antioxidant...
Tipo: Journal article
Palavras-chave: Antibacterial; Antioxidant; Nepal lichens; Free radicals.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602012000400010

Comparative evaluation of anthelmintic and antibacterial activities in leaves and fruits of Garcinia cambogia (Gaertn.) desr. and Garcinia indica (Dupetit-Thouars) choisy
Provedor de dados: 52
Autores: Tharachand,C.; Selvaraj,C. Immanuel; Abraham,Z.
This study aimed to evaluate the in vitro anthelmintic activity and antibacterial activity of the extracts from the leaves and fruits of Garcinia indica (Dupetit-Thouars) Choisy and Garcinia cambogia(Gaertn.) Desr. using the Indian earthworm Pheretima posthuma. Two concentrations (25 and 50 mg/mL) of various extracts such as petroleum ether, chloroform, ethyl acetate, methanol and water were tested. Albendazole at the concentrations of 25 and 50 mg/mL was used as the standard reference. Significant anthelmintic effects of the fruits and leaves of G. cambogia and G. indica (P&lt;0.05) were observed and the results were expressed in terms of paralysis and death time. All the extracts showed the dose dependent paralysis and death of earthworms. Among all the...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Anthelmintic; Antibacterial; Garcinia cambogia; Garcinia indica; Minimal Inhibitory Concentration.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132015000300379

Evaluation of cytotoxicity and biological activities in extracellular polysaccharides released by cyanobacterium Arthrospira platensis
Provedor de dados: 52
Autores: Challouf,Rafika; Trabelsi,Lamia; Ben Dhieb,Rym; El Abed,Omeya; Yahia,Ali; Ghozzi,Khamissa; Ben Ammar,Jihen; Omran,Hela; Ben Ouada,Hatem.
The aim of this work was to evaluate the cytotoxicity of Arthrospira platensis Extracellular Polymeric Substances (EPS) for colon cancer and kidney cell lines. Results showed that EPS were free from cytotoxic effects. A variety of solvents were assessed for their ability to extract the bioactive ingredients from EPS. Methanol gave the highest yield (75.75%) than other solvents. The extracts were tested for activities against a collection of Gram+/- bacteria. The methanol extract exhibited a more potent activity than the other organic extracts, whereas the aqueous extract was active against Staphylococcus epidermis (Gram+) and Salmonella typhimurium (Gram-). Finally, The extracts were also tested for the antioxidant activity, using the Trolox Equivalent...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Cyanobacteria; Exoplysaccharides; Cytotoxicity; Antibacterial; Antioxidant; Activity.
Ano: 2011
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000400024

Modulation of drug resistance and biofilm formation of Staphylococcus aureus isolated from the oral cavity of Tunisian children
Provedor de dados: 55
Autores: Zmantar,Tarek; Ben Slama,Rihab; Fdhila,Kais; Kouidhi,Bochra; Bakhrouf,Amina; Chaieb,Kamel.
Abstract  Objectives: This study aims to investigate the antimicrobial and the anti-biofilm activities of Lactobacillus plantarum extract (LPE) against a panel of oral Staphylococcus aureus (n = 9) and S. aureus ATCC 25923. The in vitro ability of LPE to modulate bacterial resistance to tetracycline, benzalchonium chloride, and chlorhexidine were tested also.  Methods: The minimum inhibitory concentrations (MICs) and the minimal bactericidal concentrations of Lactobacillus plantarum extract, tetracycline, benzalchonium chloride and clohrhexidine were determined in absence and in presence of a sub-MIC doses of LPE (1/2 MIC). In addition, the LPE potential to inhibit biofilm formation was assessed by microtiter plate and atomic force microscopy assays....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antibacterial; Staphylococcus aureus; Biofilm; Antibiotics; Synergetic; Lactobacillus.
Ano: 2017
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-86702017000100027

In-vitro antimicrobial activity of Psidium guajava l. leaf extracts against clinically important pathogenic microbial strains
Provedor de dados: 58
Autores: Nair,Rathish; Chanda,Sumitra.
The methanol, acetone and N, N-dimethylformamide (DMF) fractions of leaves of Psidium guajava L. were evaluated for antibacterial and antifungal activity. Piperacillin and gentamicin were used as standards for antibacterial assay, while nystatin and flucanazole were used as standards for antifungal assay. 91 clinically important strains were used for the study which were both clinical isolates as well as identified strains. The antibacterial activity was more pronounced against gram-positive bacterial and fungal strains. Moderate activity was shown against the gram-negative bacterial strains studied.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antibacterial; Antifungal; Psidium guajava extracts; Clinical isolates.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822007000300013

Volatile compounds of Lamiaceae exhibit a synergistic antibacterial activity with streptomycin
Provedor de dados: 58
Autores: Araújo,Sthéfane G.; Alves,Lucas F.; Pinto,Maria Eduarda A.; Oliveira,Graziela T.; Siqueira,Ezequias P.; Ribeiro,Rosy I. M. A.; Ferreira,Jaqueline M. S.; Lima,Luciana A. R. S.
Bacterial infections cause thousands of deaths in the world every year. In most cases, infections are more serious because the patient is already weakened, and often, the bacteria are already resistant to the antibiotics used. Counterparting this negative scenario, the interest in medicinal plants as an alternative to the synthetic antimicrobial drugs is blossoming worldwide. In the present work, we identified the volatile compounds of ethanol extracts of Melissa officinalis, Mentha sp., Ocimum basilicum, Plectranthus barbatus, and Rosmarinus officinalis by gas chromatography/mass spectrometry (GC/MS). Also was evaluated antimicrobial activity of ethanol extracts against 6 bacteria of clinical interest, and was tested the interaction of these extracts with...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Lamiaceae; Antibacterial; Ethanol extracts; Volatile compounds; Streptomycin.
Ano: 2014
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000400026

Antimicrobial activity of some medicinal plants from the cerrado of the central-western region of Brazil
Provedor de dados: 58
Autores: Violante,Ivana Maria Póvoa; Hamerski,Lidilhone; Garcez,Walmir Silva; Batista,Ana Lucia; Chang,Marilene Rodrigues; Pott,Vali Joana; Garcez,Fernanda Rodrigues.
Ethanol extracts from six selected species from the Cerrado of the Central-Western region of Brazil, which are used in traditional medicine for the treatment of infectious diseases and other medical conditions, namely Erythroxylum suberosum St. Hil. (Erythroxylaceae), Hyptis crenata Pohl. ex Benth. (Lamiaceae), Roupala brasiliensis Klotz. (Proteaceae), Simarouba versicolor St. Hil. (Simaroubaceae), Guazuma ulmifolia Lam. (Sterculiaceae) and Protium heptaphyllum (Aubl.) March. (Burseraceae), as well as fractions resulting from partition of these crude extracts, were screened in vitro for their antifungal and antibacterial properties. The antimicrobial activities were assessed by the broth microdilution assay against six control fungal strains, Candida...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antifungal; Antibacterial; Antimicrobial; Artemia salina; Cerrado.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822012000400009

Removal and killing of multispecies endodontic biofilms by N-acetylcysteine
Provedor de dados: 58
Autores: Choi,Young-Suk; Kim,Cheul; Moon,Ji-Hoi; Lee,Jin-Yong.
ABSTRACT Removal of bacterial biofilm from the root canal system is essential for the management of endodontic disease. Here we evaluated the antibacterial effect of N-acetylcysteine (NAC), a potent antioxidant and mucolytic agent, against mature multispecies endodontic biofilms consisting of Actinomyces naeslundii, Lactobacillus salivarius, Streptococcus mutans and Enterococcus faecalis on sterile human dentin blocks. The biofilms were exposed to NAC (25, 50 and 100 mg/mL), saturated calcium hydroxide or 2% chlorhexidine solution for 7 days, then examined by scanning electron microscopy. The biofilm viability was measured by viable cell counts and ATP-bioluminescence assay. NAC showed greater efficacy in biofilm cell removal and killing than the other...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antibacterial; Biofilm removal; Multispecies endodontic biofilm; N-acetylcysteine; Root canal medicament.
Ano: 2018
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000100184

Chemical composition, phytotoxic potential, biological activities and antioxidant properties of Myrcia hatschbachii D. Legrand essential oil
Provedor de dados: 60
Autores: Gatto,Larissa Junqueira; Fabri,Natasha Tiemi; Souza,Angela Maria de; Fonseca,Natasha Stopinski Triaquim da; Furusho,Alethéia dos Santos; Miguel,Obdulio Gomes; Dias,Josiane de Fatima Gaspari; Zanin,Sandra Maria Warumby; Miguel,Marilis Dallarmi.
Myrcia hatschbachii D. Legrand (Myrtaceae) is a native and endemic species from Brazil. This study investigated the essential oil composition, phytotoxic potential, in vitro toxicity, antioxidant properties and antibacterial activity of species. Chromatographic analysis of essential oil identified trans-calamanene, (E)-caryophyllene and spathulenol as major components. Antioxidant capacity was determined by the DPPH• scavenging method and phosphomolybdenum complex formation assay. Antibacterial activity was evaluated using the Minimal Inhibitory Concentration test, demonstrating that the essential oil was active toward Enterococcus faecalis and Staphylococcus aureus. Phytotoxic activity of essential oil was analyzed by testing interference on germination...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Essential oil; Phytotoxic; Antioxidant; Antibacterial; Hemolysis; Artemia salina.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100560

Enzyme inhibition and antibacterial potential of 4-Hydroxycoumarin derivatives
Provedor de dados: 60
Autores: Saleem,Afia; Bukhari,Syed Majid; Zaidi,Asma; Farooq,Umar; Ali,Majid; Khan,Asma; Khan,Sidra; Shah,Kausar Hussain; Mahmood,Adeem; Khan,Farhan Ahmed.
The 4-Hydroxycoumarin derivatives are known to show a broad spectrum of pharmacological applications. In this paper we are reporting the synthesis of a new series of 4-Hydroxycoumarin derivatives synthesized through Knovenegal condensation; they were characterized by using UV-Vis, FT-IR, NMR spectroscopies. The synthesized compounds were evaluated for antibacterial activity against Staphylococcus aureus and Salmonella typhimurium strains. The compounds (2), (3) and (8) showed favorable antibacterial activity with zone of inhibitions 26.5± 0.84, 26.0 ± 0.56 and 26.0 ± 0.26 against Staphylococcus aureus (Gram-positive) respectively. However, the compounds (5) and (9) were found more active with 19.5 ± 0.59 and 19.5 ± 0.32 zone of inhibitions against...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: 4-Hydroxycoumarin; Anti-urease; Carbonic anhydrase; Aldehydes; Antibacterial.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100580

Characterization of bacterial endophytes from Myanmar medicinal plants for antimicrobial activity against human and plant pathogens
Provedor de dados: 60
Autores: Myo,Ei Mon; Maung,Chaw Ei Htwe; Mya,Khin Mar; Khai,Aye Aye.
This research aimed to investigate the antagonistic activity of the bacterial endophytes from Myanmar medicinal plants. Thirty-one bacterial isolates were isolated from Myanmar medicinal plants: Tinospora cordifolia (Wild.) Miers., Catharanthus roseus G. Don., Tectona hamiltoniana Wall. and Boscia variabilis Collett &amp; Hemsl. (Capparaceae). Dual culture and agar well diffusion methods were used for antimicrobial assay. One endophyte from Catharanthus roseus and two bacterial isolates from Boscia variabilis Collett &amp; Hemsl. (Capparaceae) had not only the antibacterial activity towards the human pathogenic bacteria but also the antifungal activity against the plant pathogenic fungi. From 16S rRNA sequencing, one strain from Catharanthus roseus G. Don....
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antibacterial; Antifungal; Culture conditions; Endophytes; Medicinal plants.
Ano: 2020
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502020000100513

Antibacterial activity tannin-rich fraction from leaves of Anacardium humile
Provedor de dados: 65
Autores: Ferreira,Peracio Rafael Bueno; Mendes,Cíntia Sorandra Oliveira; Rodrigues,Cínthia Gracielly; Rocha,Juliane Caroline Moura; Royo,Vanessa de Andrade; Valério,Henrique Maia; Oliveira,Dario Alves de.
In vitro tests conducted with extracts rich in tannins have identified several biological activities of this class of substance. Thus, this paper intends to evaluate the antibacterial activity of tannin-rich fraction obtained from leaf extracts of Anacardium humile A.St.-Hil. Extracts of A. humile leaves in 70% acetone were semi-purified with ethyl acetate and butanol. We quantified the total tannins of the semi-purified fractions, of the crude extract and of aqueous residues and then performed tests of the antibacterial activity of the tannins against Staphylococcus aureus ATCC 6538, Pseudomonas aeruginosa ATCC 27853 and Enterococcus faecalis ATCC 29212. All positive extracts underwent tannin isolation using a Sephadex LH-20 column. The tannins isolated...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Phenolic; Cajuí; Antibacterial; MIC; MBC; Sephadex LH-20.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782012001000023