ABSTRACT
From the point of nutrition, carbohydrate is one of the most important nutrients in the human diet when daily intake is considered. According to dietary advice, 50-60" of total energy that people consume should come from carbohydrates. Hyaluronic acid is a kind of mucopolysaccharide that is composed of disaccharide repeating units by alternate beta and beta glycosidic bonds. Hyaluronic acid has long been extracted from animal tissues. The production of hyaluronic acid was thus limited by the quality of raw materials, extraction costs, and especially the animal epidemic risk. Cyclodextrins are cyclic oligomeric compounds formed by more than six glucose units through an alpha-1,4-glycosidic bond, which are obtained by enzymatic hydrolysis and cyclization of starch and related substrates. Hemicellulose is a heterogeneous polymer composed of xylose, arabinose, galactose, and other monosaccharides. Sugar alcohols are a kind of polyols containing two or more hydroxyls.
