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Antimicrobial effect of polyphenols from apple skins on human bacterial pathogens Electron. J. Biotechnol.
Alberto,María Rosa; Rinsdahl Canavosio,Matías Andrés; Manca de Nadra,María Cristina.
Apples possess many beneficial properties for the human health related with their high content in phenolic compounds. The antimicrobial effect of these compounds from the skin of two apple varieties, Royal Gala and Granny Smith, against human pathogens was examined. The phenolic compounds were extracted with the following solvents: A, acetone: water: acetic acid; B, ethyl acetate: methanol: water and C, ethanol: water. Total phenolic, flavonoid and non-flavonoid contents were analyzed in the extracts. The antimicrobial effect was determined using the agar diffusion method. The highest inhibitory effect of both apple varieties corresponded to extract A, which contained a high phenolic content. The Granny Smith extracts with higher phenolic content presented...
Tipo: Journal article Palavras-chave: Bacterial inhibition; Granny Smith; Royal Gala; Pathogens; Phenolic extracts.
Ano: 2006 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582006000300006
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Growth and antibacterial activity of Lentinula edodes in liquid media supplemented with agricultural wastes Electron. J. Biotechnol.
Hiroko Hassegawa,Regina; Megumi Kasuya,Maria Catarina; Dantas Vanetti,Maria Cristina.
Antibacterial activity of Lentinula edodes against Bacillus subtilis was evaluated in cell-free filtrates obtained after growth in 14 different culture media. The highest B. subtilis growth inhibition was promoted by filtrates of growth media supplemented with rice bran, vermiculite or molasses. L. edodes dry mycelial biomass in liquid culture with 0.5% added rice bran was 3.2 mg/ml, after growth for 30 days at 25ºC without shaking, and 4.3 mg/ml under orbital shaking (150 rpm). However, antibacterial activity, detected between 20 and 24 days of incubation of stationary cultures, was absent in filtrates of aerated cultures. Temperatures of 20-25ºC enhanced both growth and antibacterial activity. Optimum pH for L. edodes mycelial growth...
Tipo: Journal article Palavras-chave: Bacterial inhibition; Bioconversion; Mycelial growth; Mushroom; Shiitake.
Ano: 2005 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582005000200011
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Methanogenic toxicity evaluation of chlortetracycline hydrochloride Electron. J. Biotechnol.
Reyes-Contreras,Carolina; Vidal,Gladys.
Background Anaerobic digestion is a technology applied successfully to converting organic matter into biogas. However, the presence of inhibitory compounds such as antibiotics can adversely affect methane production. The aim of this study is to evaluate the toxic effect of chlortetracycline hydrochloride (CLOR) on the methanogenic bacteria. In order to study the methanogenic toxicity of CLOR, different concentrations of CLOR (10, 50, 100, 200 mg L- 1) were evaluated by methanogenic toxicity assays using three feedings. Results Maximum methane production was obtained for the assays with 10 mg CLOR L- 1, the values obtained were 277 ± 4.07; 193 ± 11.31 and 166 ± 7.07 mL for the first, second and third feedings, respectively. The average values for acetic,...
Tipo: Journal article Palavras-chave: Antibiotics; Anaerobic batch assay; Bacterial inhibition; Volatile fatty acids.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000600010
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