2002
DOI: 10.1590/s1517-83822002000300005 View full text |Buy / Rent full text
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Abstract: In Brazil, a large amount of a fibrous residue is generated as result of soybean (Glycine max) protein production. This material, which is rich in hemicellulose and cellulose, can be used in solid state cultivations for the production of valuable metabolites and enzymes. In this work, we studied the bioconversion of this residue by bacteria strains isolated from water and soil collected in the Amazon region. Five strains among 87 isolated bacteria selected for their ability to produce either celullases or xyla… Show more

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“…Literature indicates that fluctuations in culture nutrient at late exponential and stationary growth phase induce the synthesis and release of hydrolytic enzymes including carbohydrases and protease in Bacillus species (Gessesse and Mamo, 1999;Heck et al, 2002). This was observed in this study as the highest production of xylanase and cellulase by the Bacillus strain was attained at stationary growth phase.…”
Section: Kinetics Of Growth and Time Course For Xylanase And Cellulassupporting
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“…Literature indicates that fluctuations in culture nutrient at late exponential and stationary growth phase induce the synthesis and release of hydrolytic enzymes including carbohydrases and protease in Bacillus species (Gessesse and Mamo, 1999;Heck et al, 2002). This was observed in this study as the highest production of xylanase and cellulase by the Bacillus strain was attained at stationary growth phase.…”
Section: Kinetics Of Growth and Time Course For Xylanase And Cellulassupporting
“…, Korpole et al 2011. Previous studies observed enzyme activities ranging from 0.1 mg mL -1 (Heck et al 2002) to 6,000 mg mL -1 (Yin et al 2010). The crude extract assays in this work revealed good stability and enzyme activity (87%) within a pH range from 7.0 to 9.0.…”
Section: Discussionmentioning
“…cellulase producers (Heck et al 2002, Shabeb et al 2010). In the composting process, lignocellulosic and recalcitrant compounds are first hydrolyzed by fungi and actinobacteria (Gyalai-Korpos et al 2010, Pierre et al 2011.…”
Section: Discussionmentioning
“…The protease production recorded for isolates "E," "F," and "G" was 174 U/ml, 143 U/ml, and 134 U/ml, respectively. Maximum growth and enzymes production were recorded after 72 h of incubation [19][20][21]. Effect of incubation period (pH 9.0; 37°C) Fig.…”
Section: Effect Of Incubation Period (Ph 70; 37°c)mentioning