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Contribution to the study of alkalophilic and alkali-tolerant Ascomycota from Argentina Darwiniana
Elíades,L. A.; Cabello,M. N.; Voget,C. E..
Several species of alkalophilic and alkali-tolerant soil Ascomycota were isolated and reported here, namely: Emericellopsis minima; Melanospora zamiae; Neosartorya stramenia; Neurospora tetrasperma; Talaromyces flavus var. flavus; Talaromyces trachyspermus; Talaromyces stipitatus and Westerdykella dispersa. Neosartorya stramenia, Neurospora tetrasperma and Westerdykella dispersa were recorded for the first time for Argentina.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Soil fungi; Ascomycota; Alkalophilic; Alkali-tolerant; Argentina.
Ano: 2006 URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S0011-67932006000100005
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One-step purification and characterization of cellulase-free xylanase produced by alkalophilic Bacillus subtilis ash BJM
Sanghi,Ashwani; Garg,Neelam; Gupta,V.K.; Mittal,Ashwani; Kuhad,R.C..
The present study describes the one-step purification and characterization of an extracellular cellulase-free xylanase from a newly isolated alkalophilic and moderately thermophilic strain of Bacillus subtilis ASH. Xylanase was purified to homogeneity by 10.5-fold with ~43% recovery using ion-exchange chromatography through CM-Sephadex C-50. The purified enzyme revealed a single band on SDS-PAGE gel with a molecular mass of 23 kDa. It showed an optimum pH at 7.0 and was stable over the pH range 6.0-9.0. The optimum temperature for enzyme activity was 55 ºC. The purified xylanase did not lose any activity up to 45 ºC, however, it retained 80% and 51% of its activity after pre-incubation at 55 ºC and 60 ºC, respectively. The enzyme obeyed Michaelis-Menton...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alkalophilic; Bacillus subtilis; Purification; Xylanase.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822010000200029
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