目的分析中国沙棘雄花花被及花粉蛋白质含量和氨基酸组成及其营养均衡性。方法采用凯氏定氮法和柱后衍生阳离子交换色谱方法分析中国沙棘雄花花被及花粉中蛋白质和氨基酸的含量,并结合国际上通用的营养价值评价方法对其蛋白质含量、化...目的分析中国沙棘雄花花被及花粉蛋白质含量和氨基酸组成及其营养均衡性。方法采用凯氏定氮法和柱后衍生阳离子交换色谱方法分析中国沙棘雄花花被及花粉中蛋白质和氨基酸的含量,并结合国际上通用的营养价值评价方法对其蛋白质含量、化学评分(chemical sore,CS)、氨基酸评分(aminoacid score,AAS)、必需氨基酸指数(essential amino acid index,EAAI)、氨基酸比值系数分(score of ratio coefficient of amino acid,SRCAA)、生物价(biological value,BV)和营养指数(nutritional index,NI)等进行综合评价。结果中国沙棘雄花花被及花粉蛋白质含量分别为16.07%、20.45%;中国沙棘雄花花被及花粉中氨基酸含量无显著差异,17种氨基酸总含量分别为13.59 g/100 g、17.06 g/100 g;蛋白质营养评价表明,中国沙棘雄花花被及花粉中总必需氨基酸分别为31.14 g/100 g、33.10 g/100 g,接近于联合国粮农组织与世界卫生组织(Food and Agriculture Organization of the United Nations/World Health Organization,FAO/WHO)模式(35.0 g/100 g)而低于全鸡蛋模式(49.7 g/100 g)。CS和AAS显示,含硫氨基酸(蛋氨酸+半胱氨酸)为中国沙棘雄花花被及花粉的第一限制性氨基酸;两个样品氨基酸比值系数分别为99.51、98.07,均接近于FAO/WHO模式氨基酸分值(100),营养价值高;必需氨基酸指数为52.80、61.20。结论中国沙棘雄花花被及花粉氨基酸含量丰富,种类较齐全,可作为理想的蛋白质来源,并与其他日常膳食搭配作为氨基酸补充剂应用。展开更多
In order to study the physiological mechanism of mail sterile Chestnut during male inflorescence abortion, the activities of SOD, POD, CAT and the content of MDA of male sterile variety of `Fulaiwuhua’ and male ferti...In order to study the physiological mechanism of mail sterile Chestnut during male inflorescence abortion, the activities of SOD, POD, CAT and the content of MDA of male sterile variety of `Fulaiwuhua’ and male fertile variety of `Dahongpao’ during the development of male inflorescence were measured. The results showed that the SOD activities of mail sterile variety were higher than that of male fertile variety during the development of male inflorescence. The POD activities of mail sterile variety were higher than male fertile variety at the early stage of male inflorescence development, and rose obviously when the male inflorescence was dropping. The CAT activities of mail sterile variety were obviously higher than that of male fertile variety and their changes trend was the same. The MDA contents of mail sterile variety were obviously lower than that of male fertile variety except the male inflorescence was dropping. It was suggested that the destroying of active oxygen eliminating system might be the physiological reason of male inflorescence abortion.展开更多
文摘目的分析中国沙棘雄花花被及花粉蛋白质含量和氨基酸组成及其营养均衡性。方法采用凯氏定氮法和柱后衍生阳离子交换色谱方法分析中国沙棘雄花花被及花粉中蛋白质和氨基酸的含量,并结合国际上通用的营养价值评价方法对其蛋白质含量、化学评分(chemical sore,CS)、氨基酸评分(aminoacid score,AAS)、必需氨基酸指数(essential amino acid index,EAAI)、氨基酸比值系数分(score of ratio coefficient of amino acid,SRCAA)、生物价(biological value,BV)和营养指数(nutritional index,NI)等进行综合评价。结果中国沙棘雄花花被及花粉蛋白质含量分别为16.07%、20.45%;中国沙棘雄花花被及花粉中氨基酸含量无显著差异,17种氨基酸总含量分别为13.59 g/100 g、17.06 g/100 g;蛋白质营养评价表明,中国沙棘雄花花被及花粉中总必需氨基酸分别为31.14 g/100 g、33.10 g/100 g,接近于联合国粮农组织与世界卫生组织(Food and Agriculture Organization of the United Nations/World Health Organization,FAO/WHO)模式(35.0 g/100 g)而低于全鸡蛋模式(49.7 g/100 g)。CS和AAS显示,含硫氨基酸(蛋氨酸+半胱氨酸)为中国沙棘雄花花被及花粉的第一限制性氨基酸;两个样品氨基酸比值系数分别为99.51、98.07,均接近于FAO/WHO模式氨基酸分值(100),营养价值高;必需氨基酸指数为52.80、61.20。结论中国沙棘雄花花被及花粉氨基酸含量丰富,种类较齐全,可作为理想的蛋白质来源,并与其他日常膳食搭配作为氨基酸补充剂应用。
文摘In order to study the physiological mechanism of mail sterile Chestnut during male inflorescence abortion, the activities of SOD, POD, CAT and the content of MDA of male sterile variety of `Fulaiwuhua’ and male fertile variety of `Dahongpao’ during the development of male inflorescence were measured. The results showed that the SOD activities of mail sterile variety were higher than that of male fertile variety during the development of male inflorescence. The POD activities of mail sterile variety were higher than male fertile variety at the early stage of male inflorescence development, and rose obviously when the male inflorescence was dropping. The CAT activities of mail sterile variety were obviously higher than that of male fertile variety and their changes trend was the same. The MDA contents of mail sterile variety were obviously lower than that of male fertile variety except the male inflorescence was dropping. It was suggested that the destroying of active oxygen eliminating system might be the physiological reason of male inflorescence abortion.