کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1985527 | 1540227 | 2016 | 7 صفحه PDF | دانلود رایگان |
The structural properties and the inhibition on α-d-glucosidase activity of the low molecular weight (LCMPs-II) obtained from the optimized acid hydrolysis of the Cordyceps militaris polysaccharides (CMPs) were investigated in this paper. The LCMPs-II with a molecular weight of 28 KDa mainly composed of rhamnose, xylose and glucose with the molar ratio of 1: 2.19: 6.73 was separated from LCMPs-I which was the acid hydrolysis product of CMPs by chromatography on Sephadex G-100 column. The solubility of LCMPs-II was tested to be 32.12 ± 1.05 g in 100 mL distilled water under 25 °C. Its solubility was almost as twice as that of CMPs. Afterward, the structural features of LCMPs-II was investigated by a combination of chemical and instrumental analysis such as the specific rotation determination, FT-IR, periodate oxidation-Smith degradation, Congo-red, GC, scanning electron microscope and NMR. The results showed that the optical rotation of LCMPs-II was +25° and it was 1,3-branched-rhamnoxyloglucan which had a linear backbone of (1 → 4)-linked α-d-glucopyranose (α-d-Glcp units).
Journal: International Journal of Biological Macromolecules - Volume 93, Part A, December 2016, Pages 27–33