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Response surface methodology was used to optimize the extraction conditions of water-soluble polysaccharides from Stachys sieboldii Miq. tubers. A central composite design was used to optimize the extraction processing parameters. The optimum extraction conditions are as follows: extraction temperature, 95°C; extraction time, 2.5h; water to raw material ratio, 16; and extraction frequency, 3. Under...
Crude exopolysaccharides (LCP) were isolated from skim milk fermented by Lactobacillus casei LC2W and fractionated into three fractions (LCP1, LCP2 and LCP3) with the ratios of 35.74%, 12.61% and 33.34% (w/w) based on LCP, respectively. The molecular weight, polydispersity, intrinsic viscosity and radius of gyration of three fractions were determined by high-performance size exclusion chromatography,...
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