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| Registros recuperados: 81 | |
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| Holanda,M.L.; Melo,V.M.M.; Silva,L.M.C.M.; Amorim,R.C.N.; Pereira,M.G.; Benevides,N.M.B.. |
| A lectin isolated from the red alga Solieria filiformis was evaluated for its effect on the growth of 8 gram-negative and 3 gram-positive bacteria cultivated in liquid medium (three independent experiments/bacterium). The lectin (500 µg/mL) stimulated the growth of the gram-positive species Bacillus cereus and inhibited the growth of the gram-negative species Serratia marcescens, Salmonella typhi, Klebsiella pneumoniae, Enterobacter aerogenes, Proteus sp, and Pseudomonas aeruginosa at 1000 µg/mL but the lectin (10-1000 µg/mL) had no effect on the growth of the gram-positive bacteria Staphylococcus aureus and B. subtilis, or on the gram-negative bacteria Escherichia coli and Salmonella typhimurium. The purified lectin significantly reduced the cell density... |
| Tipo: Info:eu-repo/semantics/other |
Palavras-chave: Red alga; Solieria filiformis; Human pathogenic bacteria; Lectin; Antibacterial activity; Klebsiella pneumoniae. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2005001200005 |
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| Suffredini,I.B.; Sader,H.S.; Gonçalves,A.G.; Reis,A.O.; Gales,A.C.; Varella,A.D.; Younes,R.N.. |
| More than 20% of the world's biodiversity is located in Brazilian forests and only a few plant extracts have been evaluated for potential antibacterial activity. In the present study, 705 organic and aqueous extracts of plants obtained from different Amazon Rain Forest and Atlantic Forest plants were screened for antibacterial activity at 100 µg/ml, using a microdilution broth assay against Staphylococcus aureus, Enterococcus faecalis, Pseudomonas aeruginosa and Escherichia coli. One extract, VO581, was active against S. aureus (minimum inhibitory concentration (MIC) = 140 µg/ml and minimal bactericidal concentration (MBC) = 160 µg/ml, organic extract obtained from stems) and two extracts were active against E. faecalis, SM053 (MIC = 80 µg/ml and MBC = 90... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Plant extract; Antibacterial activity; Screening; Amazon Rain Forest; Atlantic Forest. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2004000300015 |
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| Lucarini,R.; Tozatti,M.G.; Silva,M.L.A.; Gimenez,V.M.M.; Pauletti,P.M.; Groppo,M.; Turatti,I.C.C.; Cunha,W.R.; Martins,C.H.G.. |
| This paper reports on the in vitro antibacterial and in vivo anti-inflammatory properties of a hydroethanolic extract of the aerial parts of Gochnatia pulchra (HEGP). It also describes the antibacterial activity of HEGP fractions and of the isolated compounds genkwanin, scutellarin, apigenin, and 3,5-O-dicaffeoylquinic acid, as evaluated by a broth microdilution method. While HEGP and its fractions did not provide promising results, the isolated compounds exhibited pronounced antibacterial activity. The most sensitive microorganism was Streptococcus pyogenes, with minimum inhibitory concentration (MIC) values of 100, 50 and 25 µg/mL for genkwanin and the flavonoids apigenin and scutellarin, respectively. Genkwanin produced an MIC value of 25 µg/mL against... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Gochnatia pulchra; Anti-inflammatory activity; Antibacterial activity; Medicinal plants; Proinflammatory cytokines. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-879X2015000900822 |
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| Jasuja,Nakuleshwar Dut; Gupta,Deepak Kumar; Reza,Mohtashim; Joshi,Suresh C.. |
| In the present study, rapid reduction and stabilization of Ag+ ions with different NaOH molar concentration (0.5 mM, 1.0 mM and 1.5 mM) has been carried out in the aqueous solution of silver nitrate by the bio waste peel extract of P.granatum. Generally, chemical methods used for the synthesis of AgNPs are quite toxic, flammable and have adverse effect in medical application but green synthesis is a better option due to eco-friendliness, non-toxicity and safe for human. Stable AgNPs were synthesized by treating 90 mL aqueous solution of 2 mM AgNO3 with the 5 mL plant peels extract (0.4% w/v) at different NaOH concentration (5 mL). The synthesized AgNPs were characterized by UV-Vis spectroscopy, TEM and SEM. Further, antimicrobial activities of AgNPs were... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Silver nanoparticles; Biowaste; Antibacterial activity; MIC; SEM; TEM. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000400024 |
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| Indu,M.N.; Hatha,A.A.M.; Abirosh,C.; Harsha,U.; Vivekanandan,G.. |
| Antibacterial activity of extracts of Allium sativum (garlic), Myristica fragrans (nutmeg), Zingiber officinale (ginger), Allium cepa (onion) and Piper nigrum (pepper) has been evaluated against 20 different serogroups of Escherichia coli, 8 serotypes of Salmonella, Listeria monocytogenes and Aeromonas hydrophila. Garlic extract showed excellent antibacterial activity against all the test organisms, except L. monocytogenes. Nutmeg showed good anti-listerial activity, although activity against E. coli and Salmonella were serotype dependent. Both garlic and nutmeg extracts were effective against A. hydrophila. Extracts of ginger showed inhibitory activity against two serogroups of E. coli: as O8 (enterotoxigenic E. coli) and O88 only. Extracts of onion and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Spices extract; Antibacterial activity; Escherichia coli; Salmonella; Listeria monocytogenes; Aeromonas hydrophila. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822006000200011 |
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| Cole,E.R.; Santos,R.B. dos; Lacerda Júnior,V.; Martins,J.D.L.; Greco,S.J.; Cunha Neto,A.. |
| The essential oil (EO) composition of ripe fruit of S. terebinthifolius Raddi was analyzed by GC-MS. The oil extraction yielded 6.54 ± 1.06% (w/w). Seventeen compounds were identified, accounting for 91.15% of the total oil, where monoterpenes constituted the main chemical class (85.81%), followed by sesquiterpenes (5.34%). The major monoterpene identified was δ-3-carene (30.37%), followed by limonene (17.44%), α-phellandrene (12.60%) and α-pinene (12.59%). Trans-caryophyllene (1.77%) was the major sesquiterpene identified. The antibacterial activity of the essential oil was evaluated against wild strains of hospital origin (Escherichia coli, Pseudomonas sp., Klebsiella oxytoca, Corynebacterium sp., Staphylococcus aureus, Enterobacter sp., Enterobacter... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Essential oil; Schinus terebinthifolius Raddi; GC-MS; Antibacterial activity. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000300009 |
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| Sourabh,Aditi; Kanwar,S.S.; Sud,R.G.; Ghabru,Arti; Sharma,O.P.. |
| Phenolic compounds of nutraceutical importance viz., catechins (C), (-)-epicatechin (EC), (-)-epigallocatechin (EGC), (-)-epigallocatechin-3-gallate (EGCG) and (-)-epicatechin-3-gallate (ECG) were estimated in fresh green tea shoots of Camellia sinensis (L) O Kuntze cultivar. The total polyphenols and total catechins were in the range of 219.90 to 317.81 and 140.83 to 271.39 g/kg, respectively in monthly samples of tea. The values of C, EC, EGC, EGCG and ECG in tea powders as analyzed through high performance liquid chromatography (HPLC) were in the range of 1.560 to 3.661, 13.338 to 27.766, 26.515 to 39.597, 62.903 to 102.168 and 18.969 to 39.469 mg/g, respectively. Effect of tea extracts and standard flavanols against five pathogenic bacteria viz.,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Kangra tea; Western Himalayas; Probiotics; Catechins; Antibacterial activity. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000300007 |
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| Paz,Jorge Enrique Wong; Contreras,Carolina Rubio; Munguía,Abigail Reyes; Aguilar,Cristóbal Noé; Inungaray,María Luisa Carrillo. |
| Abstract Hamelia patens, is a plant traditionally used to treat a variety of conditions among the Huastec people of Mexico. The objective of this study is to characterize the phenolic content and critically examine the antimicrobial activity of leaf extracts H. patens, obtained by maceration, Soxhlet and percolation, using ethanol as 70% solvent. Phenolic compounds are characterized by liquid chromatography, coupled to a High Resolution Mass Spectrometry, and the antimicrobial activity was studied from the inhibitory effect of each extract for Escherichia coli, Staphylococcus aureus, Salmonella typhi and S. paratyphi, and by the Minimum Bactericidal Concentration, the percentage of activity and the Index of Bacterial Susceptibility of each extract. The... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antibacterial activity; Hamelia patens; Polyphenols; HPLC-MS. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822018000300656 |
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| Petrolini,Fernanda Villas Boas; Lucarini,Rodrigo; Souza,Maria Gorete Mendes de; Pires,Regina Helena; Cunha,Wilson Roberto; Martins,Carlos Henrique Gomes. |
| In this study we evaluated the antibacterial activity of the crude hydroalcoholic extracts, fractions, and compounds of two plant species, namely Rosmarinus officinalis and Petroselinum crispum, against the bacteria that cause urinary tract infection. The microdilution method was used for determination of the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). The crude hydroalcoholic extract of R. officinalis displayed in vitro activity against Gram-positive bacteria, with satisfactory MBC for the clinical isolate S. saprophyticus. The fractions and the pure compound rosmarinic acid did not furnish promising results for Gram-negative bacteria, whereas fractions 2, 3, and 4 gave encouraging results for Gram-positive... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antibacterial activity; Bioassay; Rosmarinus officinalis; Petroselinum crispum; Urinary Tract Infections (UTI). |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822013000300025 |
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| Thomas,Roshmi; Janardhanan,Anju; Varghese,Rintu T.; Soniya,E.V.; Mathew,Jyothis; Radhakrishnan,E.K.. |
| Metal nanoparticle synthesis is an interesting area in nanotechnology due to their remarkable optical, magnetic, electrical, catalytic and biomedical properties, but there needs to develop clean, non-toxic and environmental friendly methods for the synthesis and assembly of nanoparticles. Biological agents in the form of microbes have emerged up as efficient candidates for nanoparticle synthesis due to their extreme versatility to synthesize diverse nanoparticles with varying size and shape. In the present study, an eco favorable method for the biosynthesis of silver nanoparticles using marine bacterial isolate has been attempted. Very interestingly, molecular identification proved it as a strain of Ochrobactrum anhtropi. In addition, the isolate was found... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biosynthesis; Silver nanoparticles; Ochrobactrum anhtropi; Purification; Antibacterial activity. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000400012 |
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| Shetty,Prakasham Reddy; Buddana,Sudheer Kumar; Tatipamula,Vinay Bharadwaj; Naga,Yaswanth Varanasi Venkata; Ahmad,Jamal. |
| A highly potent secondary metabolite producing actinomycetes strain is isolated from marine soil sediments of Visakhapatnam sea coast, Bay of Bengal. Over all ten strains are isolated from the collected soil sediments. Among the ten actinomycetes strains the broad spectrum strain RSPSN2 was selected for molecular characterization, antibiotic production and its purification. The nucleotide sequence of the 1 rRNA gene (1261 base pairs) of the most potent strain evidenced a 96% similarity with Streptomyces parvulus 1044 strain, Streptomyces parvulus NBRC 13193 and Streptomyces parvulus BY-F. From the taxonomic features, the actinomycetes isolate RSPSN2 matches with Streptomyces parvulus in the morphological, physiological and biochemical characters. Thus, it... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Polypeptide antibiotic; Streptomyces parvulus; 1 rRNA characterization; Antibacterial activity; Streptomycin resistance. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822014000100044 |
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| Severino,Vanessa Gisele Pasqualotto; Silva,Maria Fátima das Graças Fernandes da; Lucarini,Rodrigo; Montanari,Lilian Bueno; Cunha,Wilson Roberto; Vinholis,Adriana Helena Chicharo; Martins,Carlos Henrique Gomes. |
| Extracts from Hortia oreadica afforded four dihydrocinnamic acid derivatives, isolated from the n-hexane extract, as well as limonoid guyanin and the furoquinoline alkaloid dictamnine, both isolated from the dichloromethane extract. The extracts and the isolated compounds were tested against some oral pathogens, so as to investigate their antibacterial activity. The results showed that the n-hexane extract and the compound dictamnine are the most active against the selected microorganisms. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Hortia oreadica; Rutaceae; Antibacterial activity; MIC; Oral pathogens. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000300015 |
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| Registros recuperados: 81 | |
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