2013
DOI: 10.1590/s1517-83822013000200036
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Abstract: One variable at a time procedure was used to evaluate the effect of qualitative variables on the production of tannase from Aspergillus niger Van Tieghem. These variables including: fermentation technique, agitation condition, tannins source, adding carbohydrates incorporation with tannic acid, nitrogen source type and divalent cations. Submerged fermentation under intermittent shaking gave the highest total tannase activity. Maximum extracellular tannase activity (305 units/50 mL) was attained in medium conta… Show more

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Cited by 15 publications
(5 citation statements)
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“…Lower levels of enzyme production was also observed in the absence of carbon source for A. niger ANG18. Similar results with higher enzyme production using tannic acid were reported for A. niger [38], A. tamarii [19] and Aspergillus niger Van Tieghem [39]. Significant amounts of enzyme were also produced by both strains in the presence of gallic acid.…”
Section: Influence Of the Carbon Sources On Enzyme Productionsupporting
confidence: 87%
“…Lower levels of enzyme production was also observed in the absence of carbon source for A. niger ANG18. Similar results with higher enzyme production using tannic acid were reported for A. niger [38], A. tamarii [19] and Aspergillus niger Van Tieghem [39]. Significant amounts of enzyme were also produced by both strains in the presence of gallic acid.…”
Section: Influence Of the Carbon Sources On Enzyme Productionsupporting
confidence: 87%
“…A comparison of the tannase activity in R1 and R3 provides information about the effect of malt extract as a co-substrate in the treatment. The results indicated that the additional source of carbon promoted tannase production, contrary to that observed by other authors [39]. Alternatively, the cosubstrate may have supported the growth of the fungal biomass and, potentially, tannase production.…”
Section: Tannase Activitycontrasting
confidence: 92%
“…However, shaking conditions have also been demonstrated to improve tannase production by Aspergillus spp. [39]. The mechanisms regulating microbial tannase production are currently not well understood.…”
Section: Tannase Activitymentioning
confidence: 99%
“…Não houve diferença (P>0,05) na atividade enzimática entre as fontes de nitrogênio estudadas (Tabela 1). Em contradição, diversos trabalhos relatam que o tipo de fonte de nitrogênio influencia de forma significativa na produção de tanase (ABOUBAKR et al 2013;SHARMA et al, 2015).…”
Section: Resultsunclassified