Polysaccharide is widely distributed in natural resources, and currently attracts scientists' attention for their various bio-functions including immunomodulatory activity, hypoglycemic hypolipidemic antitumor promoting effects on gastrointestinal function, so on. The purity structure characteristics of different polysaccharides greatly restrict the in-depth study bioactivity mechanism. Therefo...

The aim of this study was to investigate the antioxidant activity using different in vitro assays and nitric oxide synthase activation property of crude water soluble polysaccharide from P. ostreatus. The polysaccharide was isolated by hot water extraction and physico-chemical investigation revealed that it contained high amount of carbohydrate (mostly β-glucan) and low amount of protein and ph...

Here, the immunomodulatory effects of water-soluble polysaccharide from Grifola frondosa on RAW264.7 macrophages and its molecular mechanisms were investigated. G. frondosa polysaccharide could obviously enhance immunostimulatory activity such as the release of nitric oxide and cytokine production. Western blotting results showed that G. frondosa polysaccharide elevated the TLR4, which might ac...

A water-insoluble chitin-glucan complex, isolated from the mycelium of Aspergillus niger, was swollen in various aqueous media and treated subsequently by high-energy sonication. The concentration of the resulting water-soluble polysaccharide fractions was dependent on the swelling medium, the amount of the chitin-glucan complex in the suspension, and on the time of sonication. The yields of wa...

Background and Objectives: Kefiran (Kef) is a water-soluble polysaccharide that can form transparent film however, it is brittle. Therefore, in order to improve the mechanical properties of kefiran film, a mixture with other polymers can be offered. The expansion of mixed systems can propose kefiran and polyvinyl alcohol (PVOH) as a new composite film. Materials and Methods: Solutions of 20 gr...

Laminarin, a water-soluble polysaccharide is known to induce aggregation and fusion of liposomes. Using laminarin specific lysing enzymes for multi-lamellar liposomes their aggregation was found to be fully reversible, in contrast to small unilamellar liposomes for which irreversible fusion is the main process. Moreover, our results indicate that these processes are probably mediated by the for...

Chitosan, the cationic polysaccharide derived from the natural polysaccharide chitin, has been studied as a biomaterial for more than two decades. As a polycationic polymer with favorable properties, it has been widely used to form polyelectrolyte complexes with polyanions for various applications in drug delivery fields. In recent years, a growing number of studies have been focused on the pre...

Cell wall polysaccharides play an important role in postharvest fruit texture softening. Effects of calcium treatment combined with cold storage on the physical properties, polysaccharide content and nanostructure of apricots were investigated. Apricots were immersed in distilled water, 1% or 3% w/v calcium chloride, then stored at 5°C or 10°C. Storage at 5°C significantly improved apricot qual...