泽泻梗的营养成分及对α-葡萄糖苷酶活性的影响

Nutrients and α-Glucosidase Inhibitory Activity of Peduncle of Alisma orientale

采用国标方法测定泽泻梗的营养成分,用化学比分法和氨基酸比值系数法对其蛋白质的营养价值进行评价。此外,还对泽泻梗粗提物抑制α-葡萄糖苷酶的活性进行了测定。结果表明:泽泻梗(每100 g干样)含粗蛋白26.10 g、粗脂肪2.20 g、总膳食纤维27.56 g、灰分8.70 g、多糖4.22 g、还原糖4.87 g、维生素C 406.30 mg、胡萝卜素380.00μg。泽泻梗蛋白质组成中必需氨基酸/总氨基酸(EAA/TAA)为39.54%、必需氨基酸/非必需氨基酸(EAA/NEAA)为60.46%,鲜味氨基酸占总氨基酸含量的40%以上;其第一限制性氨基酸为含硫氨基酸(蛋氨酸和胱氨酸)。浓度为500μg/m L的泽泻梗水提醇沉物、泽泻梗醇提物的α-葡萄糖苷酶抑制率分别为43.75%、39.90%。

The nutrients components of the peduncle of Alisma or/enta/e （ Sam. ） Juzep. were determined using national standard method and its nutritional value of protein was evaluated by methods of chemical score and ratio coeglcient of amino acid. In addition, the inhibitory activity of its crude extracts on a-glucosidase was investigated. The results showed that the contents （per 100 g of dry sample） of crude protein, crude fat,total dietary fiber, ash, polysaccharide, reducing sugar, vitamin C and carotene were 26.10,2.20,27.56,8.70,4.22,4. 87 g,406.30 mg and 380. 00μg, respectively. The ratio of essential amino acid to total amino acid （EAA/TAA） was 39.54% and the ratio of essential amino acid to not essential amino acid （EAA/NEAA） was 60.46%. The proportion of flavor amino acid in total amino acid was more than 40%. Sulphur amino acids （methionine and cystine） were its first limiting essential amino acid. In addition,both of its water and alcohol extract （500μg/mL） showed inhibitory activity on α-glucesidase,with inhibition rates of 43.75% and 39.90% respectively.