A novel polysaccharide from Boletus edulis: Extraction, purification, characterization and immunologic activity was written by Yu, Shasha;Ma, Rongjie;Dong, Xiaodan;Ji, Haiyu;Liu, Anjun. And the article was included in Industrial Crops and Products in 2022.Category: alcohols-buliding-blocks This article mentions the following:
A novel polysaccharide (BEP) was extracted from Boletus edulis, and its structural characteristics and immunol. activity were evaluated. Our findings revealed that BEP (139 kDa) contained Man, Glc, and Gal in the molar ratio of 1:0.15:0.17 with typical characteristic absorption peaks of polysaccharides. Moreover, the results of methylation and 1D/2D NMR spectroscopy indicated that the backbone of BEP was (→6)-α-Manp-(1→ and →3,6)-α-Manp-(1→, with the side chain →3)-β-Manp-(1→, →3)-α-Galp-(1→ and α-Glcp-(1→)). The immunol. activity tests demonstrated that the BEP could enhance phagocytosis of peritoneal macrophages and secrete NO and cytokines in a dose-dependent by activated macrophage. It was noteworthy that the secretions of NO, IL-6 and TNF-α at 400 μg/mL concentration were increased by 25.50%, 191.67% and 196.05% compared with the control group, resp. The results illustrated that BEP was a novel polysaccharide, which may be marked as an immunol. agent in the food, pharmaceutical and cosmetic industries. In the experiment, the researchers used many compounds, for example, (2R,3S)-rel-Butane-1,2,3,4-tetraol (cas: 149-32-6Category: alcohols-buliding-blocks).
(2R,3S)-rel-Butane-1,2,3,4-tetraol (cas: 149-32-6) belongs to alcohols. The oxygen atom of the strongly polarized O―H bond of an alcohol pulls electron density away from the hydrogen atom. This polarized hydrogen, which bears a partial positive charge, can form a hydrogen bond with a pair of nonbonding electrons on another oxygen atom. Under carefully controlled conditions, simple alcohols can undergo intermolecular dehydration to give ethers. This reaction is effective only with methanol, ethanol, and other simple primary alcohols.Category: alcohols-buliding-blocks
Referemce:
Alcohol – Wikipedia,
Alcohols – Chemistry LibreTexts