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Arginine Specific Aminopeptidase from Lactobacillus brevis BABT
Nandan,Arya; Gaurav,Amit; Pandey,Ashok; Nampoothiri,Kesavan Madhavan.
Tipo: Info:eu-repo/semantics/article
Ano: 2011 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132011000100018
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Alpha amylase from a fungal culture grown on oil cakes and its properties BABT
Ramachandran,Sumitra; Patel,Anil K.; Nampoothiri,Kesavan Madhavan; Chandran,Sandhya; Szakacs,George; Soccol,Carlos Ricardo; Pandey,Ashok.
Solid-state fermentation was carried out for the production of alpha-amylase using Aspergillus oryzae. Different oil cakes such as coconut oil cake (COC) sesame oil cake (SOC), groundnut oil cake (GOC), palm kernel cake (PKC) and olive oil cake (OOC) were screened to be used as substrate for the enzyme production and also compared with wheat bran (WB). GOC was found to be the best producer of the enzyme among these. Combination of WB and GOC (1:1) resulted higher enzyme titres than the individual substrates. Maximum amount of enzyme (9196 U/gds) was obtained when SSF was carried out using WB + GOC, having initial moisture of 64% and supplemented with lactose and ammonium nitrate (1% each) at 30ºC for 72h using 2 mL spore suspension (6x10(7)spores/ml)....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alpha amylase; Oil cakes; Solid-state fermentation; Partial purification; Aspergillus oryzae.
Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000200019
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Arginine specific aminopeptidase from Lactobacillus brevis BABT
Nandan,Arya; Gaurav,Amit; Pandey,Ashok; Nampoothiri,Kesavan Madhavan.
The proteolytic system of lactic acid bacteria contribute to the development of flavor during the ripening of cheese through the generation of short peptides and free amino acids, which directly or indirectly act as flavor precursors. Newly isolated lactic acid bacteria (LAB) as well as those procured from culture collection centers were screened for the production of various substrate specific aminopeptidases. Among all the strains screened, L. brevis (NRRL B-1836) was found to produce quantifiable amount of intracellular arginine specific aminopeptidase (EC 3.4.11.6). The productivity of arginine aminopeptidase in 5 L fermentor was 36 IU/L/h. The Luedeking and Piret model was tested for intracellular production of aminopeptidase and the data seemed to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lactobacillus brevis; Aminopeptidases; Arginine- p- nitroanilide.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000600021
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Extracellular methionine amino peptidase (MAP) production by Streptomyces gedanensis in solid-state fermentation BABT
Rahulan,Raji; Manjunath,G; Nampoothiri,Kesavan Madhavan; Pandey,Ashok.
A bioprocess was developed for extracellular MAP production from Streptomyces gedanensis by solid-state fermentation. Response surface methodology of Box Behken Design was performed to evaluate the interaction effects of most significant variables {inoculum size, (NH4)2SO4 concentration, MgSO4.7H2O and tryptone) on MAP production after the single parameter optimization and it resulted a maximum MAP production of 55.26 IU/g PUF after 120 h of fermentation. The concentrated crude MAP displayed a pH and temperature optimum of 8.5 and 50°C. By analyzing the thermal stability, the MAP was found to be stable in a temperature range of 50 to 55°C but lost about 50% of its activity at 65°C after 30 min. This is a first report of this kind of study for MAP.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Streptomyces gedanensis; Methionine amino peptidase; Fermentation; Box Behnken design.
Ano: 2014 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132014000200005
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