Detection and nutritional assessment of fresh sweet corn 520
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摘要: 分析评价乳熟期甜玉米520营养价值特点,为以甜玉米520为主要原料的玉米深加工及工程化食品开发提供数据依据。采用氨基酸分析仪、气相色谱法、离子色谱法测定甜玉米中氨基酸、脂肪酸、可溶性糖的种类及含量。结果表明,甜玉米中含蛋白质12.08%,脂肪酸6.66%,灰分2.41%。针对婴儿营养需求分析,亮氨酸、含硫氨基酸、苯丙氨酸+酪氨酸、缬氨酸评分分别为1.11、1.80、1.09、1.03;组氨酸、异亮氨酸、赖氨酸及苏氨酸分别为0.83、0.75、0.52、0.99;甜玉米520中可溶性糖总量为11.98%（湿基）,果糖占总碳水化合物的85.86%。结论:作为婴儿食物来源,该甜玉米具有充足的亮氨酸、含硫氨基酸、苯丙氨酸+酪氨酸、亮氨酸,相对缺乏组氨酸、异亮氨酸、赖氨酸及苏氨酸,含较丰富的脂肪酸,不饱和脂肪酸为亚油酸和亚麻酸,可溶性糖以果糖为主。Abstract: Nutrition composition of fresh sweet corn was detected and evaluated for new products.Amino acid, fatty acid, sugar compositions were analyzed by amino acid analyzer, gas chromatography and iron chromatography respectively.The results showed that fresh sweet corn contained 12.08% protein, 6.66% fatty acid, 2.41% ash.Soluble carbohydrate was 11.98% ( in wet basis) in which 86% was fructose. Comparing to infant essential amino acid model, AAS of leucine, sulphur amino acids, phenylalanine and tyrosine, valine were 1.11, 1.80, 1.09 and 1.03.Meanwhile, AAS of Histidine, isoleucine, lysine and threonine were 0.83, 0.75, 0.52 and 0.99 respectively which were insufficient for infant. In conclusion, the fresh sweet corn was sufficient in leucine, sulphur amino acids, valine, phenylalanine and tyrosine, but was short of histidine, isoleucine, lysine and threonine as infant food. Main unsaturated fatty acids were linoleic acid and linolenic acid.Main soluble sugar was fructose.
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Keywords:
- fresh sweet corn /
- nutrition evaluation /
- amino acid /
- fatty acid /
- soluble carbohydrate /
- iron chromatography (IC)
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