کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7788583 | 1500633 | 2015 | 38 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Characterization of an exopolysaccharide produced by Lactobacillus plantarum YW11 isolated from Tibet Kefir
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کلمات کلیدی
Sodium nitrate (PubChem CID: 24268)Rhamnose (PubChem CID: 25310)Trifluoroacetic acid (PubChem CID: 6422) - اسید Trifluoroacetic (PubChem CID: 6422)Sulfuric acid (PubChem CID: 1118) - اسید سولفوریک (PubChem CID: 1118)Exopolysaccharide - اگزو پلی ساکاریدRheology - رئولوژیFructose (PubChem CID: 5984) - فروکتوز (PubChem CID: 5984)Phenol (PubChem CID: 996) - فنل (PubChem CID: 996)Lactobacillus plantarum - لاکتوباسیلوسStructural characterization - مشخصه ساختاریSodium chloride (PubChem CID: 5234) - کلرید سدیم (PubChem CID: 5234)Glucose (PubChem CID: 79025) - گلوکز (PubChem CID: 79025)Glycerol (PubChem CID: 753) - گلیسرول (PubChem CID: 753)
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
An exopolysaccharide (EPS)-producing strain YW11 isolated from Tibet Kefir was identified as Lactobacillus plantarum, and the strain was shown to produce 90 mg Lâ1 of EPS when grown in a semi-defined medium. The molecular mass of the EPS was 1.1 Ã 105 Da. The EPS was composed of glucose and galactose in a molar ratio of 2.71:1, with possible presence of N-acetylated sugar residues in the polysaccharide as confirmed by NMR spectroscopy. Rheological studies showed that the EPS had higher viscosity in skim milk, at lower temperature, or at acidic pH. The viscous nature of the EPS was confirmed by observation with scanning electron microscopy that demonstrated a highly branched and porous structure of the polysaccharide. The atomic force microscopy of the EPS further revealed presence of many spherical lumps, facilitating binding with water in aqueous solution. The EPS had a higher degradation temperature (287.7 °C), suggesting high thermal stability of the EPS.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Carbohydrate Polymers - Volume 125, 10 July 2015, Pages 16-25
Journal: Carbohydrate Polymers - Volume 125, 10 July 2015, Pages 16-25
نویسندگان
Ji Wang, Xiao Zhao, Zheng Tian, Yawei Yang, Zhennai Yang,