کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10603484 982479 2013 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Levansucrase optimization using solid state fermentation and levan biological activities studies
ترجمه فارسی عنوان
بهینه سازی لوانسوکراس با استفاده از مطالعات تخمیر فعال گیاه جامد و فعالیت های بیولوژیکی
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آلی
چکیده انگلیسی
Bacillus subtilis NRC1aza produced levansucrase under solid state fermentation using starch as support. A sequential optimization strategy, based on statistical experimental designs is employed to enhance enzyme productivity. First, a 2-level Plackett-Burman design was applied for bioprocess parameters screen that significantly increase levansucrase production. Second optimization step was performed using fractional factorial design in order to optimize the amounts of highest positive variables that had significant effect on levansucrase productivity. Maximal enzyme productivity of 170 U/g ds was achieved in presence of glucose, yeast extract, and pH 8. In vitro, experiments confirmed that LevCR and LevQT had an antitumor activity against different animal and human cancer cell lines by demonstrating inhibitory effects on growth of Ehrlich ascites carcinoma cell line, human MCF-7 breast and liver HepG2 cancer cell lines, in particular LevQT was found to be efficacious compared to anticancer drug, cisplatin. Result focused in LevCR as strong fibrinolytic agent.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 96, Issue 1, 1 July 2013, Pages 332-341
نویسندگان
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