Stimulatory effect of certain amino acids on xylanase production by alkalophilic Bacillus sp.
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چکیده
منابع مشابه
Enhanced Production of Cellulase-free Xylanase by Alkalophilic Bacillus Subtilis Ash and Its Application in Biobleaching of Kraft Pulp
This paper reports high level production of a cellulase-free xylanase using wheat bran, a cost-effective substrate, under submerged fermentation by alkalophilic Bacillus subtilis ASH. Production of xylanase was observed even at alkaline pH up to 11.0 and temperature 60 °C, although the highest enzyme titer was recorded at neutral pH and 37 °C. The enzyme production under optimized fermentation ...
متن کاملProduction of Xylanase on Natural Substrates by Bacillus subtilis
Bacillus subtilis, locally isolated, produced significant level of xylanase activity in the presence of different carbon sources. However, B. subtilis performed well when grown on pretreated natural substrates such as rice straw, wheat straw, bagasse, wheat bran and kraft pulp at 2% concentration. The organism produced higher level of xylanasse activity when bagasse was used as a carbon source ...
متن کاملEffect of excess amino acids on growth of certain lactobacilli.
Rat growth repression caused by the presence in the diet of an unusually high concentration of certain individual amino acids has been reported (Hier et al., 1944; Graham et at., 1950; Niven et al., 1946; Martin, 1947; Van Pilsutm and Berg, 1950; Wretlind and Rose, 1950; Russel et al., 1952). It has been suggested that such repression may be due to amino acid imbalance (Hier et al., 1944) or th...
متن کاملOne-step purification and characterization of cellulase-free xylanase produced by alkalophilic Bacillus subtilis ash
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-PAG...
متن کاملEffect of Medium Composition on Xylanase Production by Bacillus subtilis using Various Agricultural Wastes
In the present study a strain of Bacillus subtilis-BS05 was grown in submerged fermentation of agricultural wastes for xylanolytic activity. Various agricultural wastes such as sugarcane bagasse, wheat straw, rice husk, soybean meal, corn cobs and wheat bran were evaluated for xylanolytic acitivity using different media (M-I, M-II, M-III & M-IV). Among all these tested substrates maximum xylano...
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ژورنال
عنوان ژورنال: Agricultural and Biological Chemistry
سال: 1987
ISSN: 0002-1369,1881-1280
DOI: 10.1271/bbb1961.51.3143