Abstract Plants in Amorphophallus genus are rich in soluble dietary fibres and have long been used as food and traditional medicine in Asian countries. In the present investigation, natural O-acetyl-glucomannans were extracted from tubers of Amorphophallus rivirei (konjac), A. albus and two local types of A. bulbifer (wild type M and wild type B), which were designated as KGM, AGM, MGM, and BGM, successively. Comparative studies were conducted on their physicochemical properties and primary structures. The four AcGMs had about 90% (w/w) neutral sugar, 11% (w/w) moisture, and 1%–2% (w/w) ash. Relatively high contents of acetyl groups (17%–24%, w/w) were detected. Mannose and glucose as the main components existed in molar ratios of 1.41, 1.41, 1.21, and 1.58 for KGM, AGM, MGM, and BGM, respectively. Relative molecular weights of AcGMs increased in the order of: KGM

中文翻译：

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魔芋O-乙酰葡甘露聚糖的研究：理化性质和一级结构比较

摘要 魔芋属植物富含可溶性膳食纤维，长期以来被亚洲国家用作食品和传统药物。在本次调查中，天然O-乙酰葡甘露聚糖是从魔芋（魔芋）、A. albus 和两种本地类型的A.bullifer（野生型M 和野生型B）中提取的，命名为KGM、AGM 、米高梅、BGM，先后。对其理化性质和一级结构进行了比较研究。四种 AcGM 含有约 90% (w/w) 中性糖、11% (w/w) 水分和 1%–2% (w/w) 灰分。检测到乙酰基含量相对较高（17%–24%，w/w）。甘露糖和葡萄糖作为主要成分，KGM、AGM、MGM 和 BGM 的摩尔比分别为 1.41、1.41、1.21 和 1.58。