文档介绍：毕业设计（论文）
普通绿豆芽和富硒绿豆芽主要营
养成分的比较
Comparative Analysis on Main Nutrient Components of General and
Selenium-enriched %，硒干重含量由处理前的 /g,灰分和粗纤维变化不显著。由此可以得到，35yg/mL 亚硒酸钠溶液培养后的富硒绿豆芽可以帮助改善我国居民缺硒的饮食问题，且 不会超过人体对硒的最高耐受量，具有较高的经济价值。
关键词：富硒；绿豆芽；硒含量；营养价值
Abstract： Mung bean sprout contains rich nutrients, but its selenium content is low, in order to improve the selenium content, so mung bean sprout was selenium-enriched to investigate the nutrition value. In order to compare main nutrients of general and selenium-enriched mung bean sprout, protein, free amino acids, crude fiber, ascorbic acid, ash and selenium content was measured by coomassie brilliant blue spectrophotometry, ninhydrin colorimetry, weight method, 2,4 -
dinitrophenylhydrazine method, high temperature burning method, ultraviolet spectrophotometry correspondingly. The results showed that the protein content of selenium-enriched mung bean sprout decreased %, free amino acid content increased %, ascorbic acid content decreased %, the content of selenium by pre-treatment yg/g dry weight increased to 1 .32yg/g dry weight, the changes of content of ash and crude fiber were not significant. These results indicated that selenium-enriched mung bean sprout with 35yg/mL sodium selenite solution may help improve our residents' diet problem of selenium deficiency, and could not exceed the human maximum tolerated dose of selenium, which has high economic value.
Key words： Selenium-enriched, mung bean sprout, selenium content, nutritional value
第一章前言
硒是人体必需的微量元素，具有重要的生理功能。硒是构成谷胱甘肽过氧 化物酶的活性成分，它能防止胰岛卩细胞氧化破坏，修复胰岛细胞，使其功能 正常，促进糖分解代谢，降低血糖和尿糖；硒能催化并消除对眼睛有害的自由 基物质，从而保护眼睛的细胞膜⑴。若长期处于缺硒状态，会影响细胞膜的完 整，从而导致视力下降和许多眼睛疾病，如白内障、视网膜病、夜盲症等⑵。 硒是很好的自由基清除剂，能抑制细胞膜的脂质过氧化，从而缓解组织细胞的 衰老进程，表现出明显的抗衰老作用，可作为抗衰老食品的活性成分。在防癌 抗癌、预防和治疗心血管疾病、克山病及大骨节病等方面的重要作用已为世人 所公认。此外，硒还具有解除重金属中毒等特殊的生理功能⑶。
另一方面，硒在人体内不能自主合成必须从外界摄取。世界卫生组织公布 的资料表明，全球有40多个国家属于低硒或缺硒地区，中国有72%的县（市） 低硒或缺硒，苏、浙、皖等长三角地区皆为严重缺硒地区。我国居民常食用的 一般蔬菜的硒含量都较低，如