|
|
|
| Registros recuperados: 56 | |
|
|
| Melo,V.M.M.; Fonseca,A.M.; Vasconcelos,I.M.; Carvalho,A.F.F.U.. |
| The antimicrobial, hemagglutinating and toxic activities of the purple fluid of the sea hare Aplysia dactylomela are described. Intact or dialyzed purple fluid inhibited the growth of species of Gram-positive and Gram-negative bacteria and the action was not bactericidal but bacteriostatic. The active factor or factors were heat labile and sensitive to extreme pH values. The fluid preferentially agglutinated rabbit erythrocytes and, to a lesser extent, human blood cells, and this activity was inhibited by the glycoprotein fetuin, a fact suggesting the presence of a lectin. The fluid was also toxic to brine shrimp nauplii (LD50 141.25 µg protein/ml) and to mice injected intraperitoneally (LD50 201.8 ± 8.6 mg protein/kg), in a dose-dependent fashion. These... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aplysia; Antimicrobial; Purple fluid; Toxicity; Hemagglutinating activity. |
| Ano: 1998 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X1998000600010 |
| |
|
|
| Machado,Terezinha Feitosa; Nogueira,Nádia Accioly P.; Pereira,Rita de Cássia Alves; Sousa,Cívita Teixeira de; Batista,ValériaChaves Vasconcelos. |
| The objective of this study was to evaluate the antimicrobial potential of Lippia alba essential oil (EOLa) and to investigate the effect of food ingredients on its efficacy. The antimicrobial potential of the oil was determined by the presence or absence of inhibition zones, minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) against Escherichia coli, Listeria innocua, Listeria monocytogenes, Pseudomonas aeruginosa, Salmonella choleraesuis and Staphylococcus aureus. The effect of food ingredients and the pH on the antimicrobial efficacy of oil was assessed by monitoring the maximum growth rate of Listeria monocytogenes in model media. The model media included potato starch (0, 1, 5 or 10%), beef extract (1, 5, 3, 6 or 12%),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Essential oil; Antimicrobial; Food ingredient. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000200045 |
| |
|
| |
|
|
| Sá,Marcus Mandolesi; Ferreira,Misael; Lima,Emerson Silva; Santos,Ivanildes dos; Orlandi,Patrícia Puccinelli; Fernandes,Luciano. |
| Bacterial resistance to commonly used antibiotics has been recognized as a significant global health issue. In this study, we carried out the screening of a family of allylic thiocyanates for their action against a diversity of bacteria and fungi with a view to developing new antimicrobial agents. Allylic thiocyanates bearing halogenated aryl groups, which were readily obtained in two steps from the Morita-Baylis-Hillman adducts, showed moderate-to-high activity against selective pathogens, including a methicillin-resistant S. aureus (MRSA) strain. In particular cases, methyl (Z)-3-(2,4-dichlorophenyl)-2-(thiocyanomethyl)-2-propenoate exhibited antimicrobial activity comparable to the reference antibiotic Imipenem. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimicrobial; Allylic thiocyanate; Morita-Baylis-Hillman reaction; MRSA. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300007 |
| |
|
|
| Souza,Juliana Leitzke Santos de; Guimarães,Victoria Burmann da Silva; Campos,Angela Diniz; Lund,Rafael Guerra. |
| Abstract Pyroligneous extract is applied in diverse areas as an antioxidant, an antimicrobial, and an anti-inflammatory agent. The discovery of new cost-effective antimicrobial agents of natural origin remains a challenge for the scientific community. This study aimed to conduct a systematic review and a technological forecasting of the existent evidence regarding the use of pyroligneous extract as a potential antimicrobial agent. Studies were identified through an investigation of various electronic databases: PubMed, SciFinder, Web of Science, Scopus, Scielo, Google scholar, and ProQuest. Patents were searched through INPI, Google patents, Espacenet, Patents online, USPTO, and WIPO. The literature on antimicrobial activity of pyroligneous extract are... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Food preservation; Antimicrobial; Infections; Preservative; Pharmaceutical. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000500128 |
| |
|
|
| Yasir,Muhammad. |
| Abstract In this study for the first-time microbial communities in the caves located in the mountain range of Hindu Kush were evaluated. The samples were analyzed using culture-independent (16S rRNA gene amplicon sequencing) and culture-dependent methods. The amplicon sequencing results revealed a broad taxonomic diversity, including 21 phyla and 20 candidate phyla. Proteobacteria were dominant in both caves, followed by Bacteroidetes, Actinobacteria, Firmicutes, Verrucomicrobia, Planctomycetes, and the archaeal phylum Euryarchaeota. Representative operational taxonomic units from Koat Maqbari Ghaar and Smasse-Rawo Ghaar were grouped into 235 and 445 different genera, respectively. Comparative analysis of the cultured bacterial isolates revealed distinct... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Caves; 16S ribosomal RNA; Microbiota; Antimicrobial; Sediments. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000200248 |
| |
|
|
| Kalia,S.B.; Kaushal,G.; Kumar,M.; Cameotra,S.S.; Sharma,A.; Verma,M.L.; Kanwar,S.S.. |
| A few mixed ligand transition metal carbodithioate complexes of the general formula [M(4-MPipzcdt)x(phen)y]Y (M = Mn(II), Co(II), Zn(II); 4-MPipzcdt = 4-methylpiperazine-1-carbodithioate; phen = 1,10-phenanthroline; x = 1 and y = 2 when Y = Cl; x = 2 and y = 1 when Y = nil) were synthesized and screened for their antimicrobial activity against Candida albicans, Escherichia coli, Pseudomonas aeruginosa,Staphylococcus aureus andEnterococcusfaecalis by disk diffusion method. All the complexes exhibited prominent antimicrobial activity against tested pathogenic strains with the MIC values in the range <8-512 μgmL-1. The complexes [Mn(4-MPipzcdt)2(phen)] and [Co(4-MPipzcdt)(phen)2]Cl inhibited the growth of Candida albicans at a concentration as low as 8... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimicrobial; Metal ions; 4-methylpiperazine-1-carbodithioate; MIC; Zone of inhibition. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000400024 |
| |
|
| |
|
|
| 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 |
| |
|
|
| Okamoto,Ana C.; Gaetti-Jardim Jr.,Elerson; Arana-Chavez,Victor E.; Avila-Campos,Mario J.. |
| Fusobacterium nucleatum is considered a bridge organism between earlier and later colonizers in dental biofilms and a putative periodontopathogen. In Dentistry, antimicrobial agents are used for treatment and control of infectious diseases associated with dental plaque. Antiseptics have been used in association with antibiotics to reduce infections after oral surgeries. In this study, the influence of subinhibitory concentrations (SC) of chlorhexidine, triclosan, penicillin G and metronidazole, on hydrophobicity, adherence to oral epithelial cells, and ultra-structure of F. nucleatum was examined. All isolates were susceptible to chlorhexidine, triclosan, and metronidazole; however, most of the isolates were susceptible to penicillin G, and all of them... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fusobacterium nucleatum; Hydrophobicity; Adherence; Antimicrobial; Ultra-structure. |
| Ano: 2002 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822002000200017 |
| |
|
| |
|
|
| Lawrence,Rubina; Tripathi,Priyanka; Jeyakumar,Ebenezer. |
| The ethanol, methanol and acetone extracts of Aloe vera gel were studied for their antimicrobial activity against four Gram-positive and Gram-negative bacteria using agar well diffusion method. The extracts showed varied levels of antimicrobial activity against the tested pathogens. The ethanol and methanol extracts showed higher activity while acetone extract, showed least or no activity against most of the tested pathogens. Fractions obtained from the extracts by Thin Layer and Column Chromatography were studied for their antagonistic properties using Spot Assay Technique. Compounds with maximum antibacterial activity isolated from the ethanol and methanol extracts were identified as p - coumaric acid (Mol. wt.165), ascorbic acid (Mol. wt.177 ),... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aloe vera; Gel; Antimicrobial; Compounds. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000400023 |
| |
|
|
| Siafaka,Panoraia; Okur,Mehmet Evren; Ayla,Şule; Er,Sevda; Cağlar,Emre Şefik; Okur,Neslihan Üstündağ. |
| Inorganic and carbon based nanomaterials are widely used against several diseases, such as cancer, autoimmune diseases as well as fungi and bacteria colonization. In this work, Santa Barbara Amorphous mesoporous silica (SBA), Halloysite Nanotubes (HNTs) and Multiwalled Carbon Nanotubes (CNTs) were loaded with fluoroquinolone Levofloxacin (LVF) to be applied as antimicrobial agents. The prepared via adsorption nanocarriers were characterized by Fourier-Transformed Spectroscopy, Scanning Electron Microscopy as well as High Pressure liquid Chromatography. In vitro release studies were carried out using Simulated Body Fluid at 37oC and data analyzed by various kinetic models showing slow dissolution over 12-24 hours. Antimicrobial studies showed improved... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbon nanotubes; Santa barbara amorphous; Halloysite nanotubes; Levofloxacin; Toxicity; Antimicrobial. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502019000100514 |
| |
|
| |
|
|
| Rocha,Marcos Fábio Gadelha; Alencar,Lucas Pereira de; Brilhante,Raimunda Sâmia Nogueira; Sales,Jamille de Alencar; Ponte,Yago Brito de; Rodrigues,Pedro Henrique de Aragão; Sampaio,Célia Maria de Souza; Cordeiro,Rossana de Aguiar; Castelo-Branco,Débora de Souza Collares Maia; Oliveira,Francisco Carlos de; Barbosa,Francisco Geraldo; Teixeira,Carlos Eduardo Cordeiro; Paiva,Manoel de Araújo Neto; Bandeira,Tereza de Jesus Pinheiro Gomes; Moreira,José Luciano Bezerra; Sidrim,José Júlio Costa. |
| This study aimed to evaluate the antifungal activity of M. oleifera extracts against fungi isolated from farmed prawns and test the toxicity of the extracts on larvae of Macrobrachium amazonicum. The ethanol extracts of pods, seeds, leaves, stems and flowers and chloroform extract of flowers of M. oleifera were tested against 14 strains of Candida spp. and 10 strains of Hortaea werneckii isolated from farming water and the digestive tract of M. amazonicum. Antifungal activity was determined by microdilution, based on the M27-A3 and M38-A2 CLSI documents. Toxicity was evaluated by exposing larvae of M. amazonicum at concentrations between 10-1000mg mL-1, counting dead larvae (CL50) after 24 hours. The best results were verified with the chloroform extract... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aquaculture; Fungi; Prawn; Moringa oleifera; Antimicrobial. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782014001202197 |
| |
|
|
| Leite,Ana Greice Borba; Farias,Eulina Tereza Nery; Oliveira,Ana Paula de; Abreu,Ruan Emmanuell Franco de; Costa,Mateus Matiuzzi da; Almeida,Jackson Roberto Guedes da Silva; Estevão,Lígia Reis de Moura; Evêncio-Neto,Joaquim. |
| ABSTRACT: This study aimed to perform phytochemical analysis and to test the antimicrobial activity of the crude hydroalcoholic extract obtained from the leaves of Sphagneticola trilobata. Classes of secondary metabolites present in the extract were identified through phytochemical screening using analytical thin-layer chromatography. Antimicrobial activity was evaluated by testing cultures of Staphylococcus aureus, S. epidermidis, Staphylococcus spp., Escherichia coli, Serratia marcescens, Enterococcus faecalis, Pseudomonas aeruginosa, Salmonella Typhimurium, and Klebsiella pneumoniae isolated from human skin and those of Staphylococcus spp. isolated from dog skin using the broth microdilution method. In the phytochemical screening, classes of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antimicrobial; Phytochemical Screening; Phenolic compounds. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000400452 |
| |
| Registros recuperados: 56 | |
|
|
|
