…Starch has no reducing power because the aldehyde groups of the glucose units in the chain are used to link the glucose units together. Generally, when a monosaccharide combines with another sugar, the reducing group of the monosaccharide forms a bond with the alcoholic hydroxyl group of the other sugar, a bond called a glycosidic linkage. Two reducing groups can also bond together, as in sucrose, but more than two sugars cannot be joined together in this manner. … *Some of the terminology explanations that mention "glycosidic linkage" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…デンプンが還元力をもたないのは,その鎖中のグルコースのアルデヒド基がグルコース単位を相互に結びつけるために使われているからである。一般に単糖が他の糖と結合するときには単糖の還元基が他の糖のアルコール性水酸基との間に結合をつくるのであり,この結合をグリコシド(配糖体)結合glycosidic linkageと呼ぶ。二つの還元基どうしが結合することもでき,その例としてショ糖があるが,この方式では二つ以上の糖をつなぎ合わせることはできない。… ※「glycosidic linkage」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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