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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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Obtaining partial purified xylose reductase from Candida guilliermondii BJM
Tomotani,Ester Junko; Arruda,Priscila Vaz de; Vitolo,Michele; Felipe,Maria das Graças de Almeida.
The enzymatic bioconversion of xylose into xylitol by xylose reductase (XR) is an alternative for chemical and microbiological processes. The partial purified XR was obtained by using the following three procedures: an agarose column, a membrane reactor or an Amicon Ultra-15 50K Centrifugal Filter device at yields of 40%, 7% and 67%, respectively.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Xylose reductase; Xylitol; Partial purification.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822009000300027
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Partial purification and characterization of xylanase produced by Penicillium expansum BABT
Querido,André Luiz de Souza; Coelho,Jorge Luiz Cavalcante; Araújo,Elza Fernandes de; Chaves-Alves,Virgínia Maria.
An extracellular xylanase was found to be the major protein in the filtrate culture of Penicillium expansum when grown on 0.3 % wheat bran, which showed no xylanase multiplicity. The enzime was partial purified by.ammonium sulfate fractioning, molecular exclusion chromatography, ultrafiltration and anion exchange chromatography. The protein eluation profile showed only one form of xylanase that was partially characterized. The activity of purified xylanase was optimal at pH 5.5 and 40 ºC. The enzyme was stable at pH between 5.5 and 6.5 and temperatures between 20-40 ºC. The enzyme showed a Km of 3.03 mM and Vmax of 0.027 mumol min-1 mug -1 of protein. The enzymatic activity was increased 31 % by Mg2+ and 28 % by Al3+.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Partial purification; Xylan/xylanases; Penicillium expansum.
Ano: 2006 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132006000400016
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