کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7544983 | 1489593 | 2018 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of nitrogen sources and fermentation conditions on bacillus sp. R2 chitinase production
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
سایر رشته های مهندسی
مهندسی صنعتی و تولید
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Effect of nitrogen sources and fermentation conditions on bacillus sp. R2 chitinase production Effect of nitrogen sources and fermentation conditions on bacillus sp. R2 chitinase production](/preview/png/7544983.png)
چکیده انگلیسی
The nutritional and environmental conditions have a great influence on chitinase production, due to the receptor-inducer system that control enzymes production.in these sense, the aim of this study was to screen several nitrogen sources and optimize the most important fermentation conditions affecting Bacillus sp. R2 chitinase production. The results of one variable at time technique (OVAT) in shake flasks, revealed that among various nitrogen sources tested 0.5% yeast extract led to maximum production. Furthermore, the highest chitinase activity was detected after 24 h incubation period at temperature of 30C, initial pH: 7.5, 2.5 to 3% NaCl concentration and under 180 rpm shaking using 2.5% (8.9 Ã 108 CFU/ml) as best inoculum size. These optimizations can reduce the cost of chitinase production for the large scale specially
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Procedia Manufacturing - Volume 22, 2018, Pages 280-287
Journal: Procedia Manufacturing - Volume 22, 2018, Pages 280-287
نویسندگان
Ben Amar Cheba, Taha Ibrahim Zaghloul, Ahmad Rafik El-Mahdy, Mohamad Hisham El-Massry,