共查询到20条相似文献,搜索用时 62 毫秒
1.
2.
3.
4.
8.
9.
11.
食品营养标签与膳食平衡 总被引:1,自引:0,他引:1
从食物中获得种类齐全,比例适当、数量充足的营养素,构成平衡的膳食.是人类保证身体健康的重要措施之一。由于营养素摄入不足或摄入过多而引起的营养性疾病比比皆是。那么如何识别食品的营养素的种类和数量,以便于选择适合自己的食物呢?食品营养标签正是满足我们需要最简单,最直接获取营养知识的工具. 相似文献
12.
13.
14.
15.
Dclintered cottonseed was hulled and flaked. Moisture-adjusted cooked and uncooked samples were either dried or left undried, and all samples were then Soxhlet-extracted with acetone for five hours and desolventized. Sensory testing of gruels prepared from the meals indicated that if free moisture was not present during acetone extraction, catty odors were not found in extracted meals. Gas chromatographic analyses of acetone extracted meals showed concentrations of 0.3 ppm mesityl oxide and 0.7 ppm diacetone alcohol, believed to be catty odor precursors, in a catty-odorless meal, whereas concentrations of 1.6 ppm and 0.8 ppm, respectively, were found in a product with a catty odor. 相似文献
16.
17.
中国居民的膳食结构与变迁 总被引:2,自引:0,他引:2
建国以来我国共进行过三次全国性的营养调查工作。第一次是在1959年,由于当时情况异常,调查结果未能发表。第二次全国营养调查于1982年实施,结果以调查总结和资料汇编的形式公布。[1]。1992年在卫生部等4个部委领导下开展了我国第三次全国营养调查,获得了约10万居民的个体膳食、体测及家庭收入、教育程度等多方面的材料[2]。这次调查虽在样本的构成、资料收集及处理方法等方面与1982年的调查不尽相同,但从人群平均的食物消费、营养素摄入及膳食构成等方面还都是可比的。本文选取两次调查的全国性数据及部分有一定特征的代表性省市自治区的数… 相似文献
18.
19.
Enzymes affecting corn lipids were inactivated by adjusting whole dent corn to 15% moisture and gradually heating it to 91° or 96°C during passage through a two-stage steam-jacketed conveyer, followed by cooling. Heat-processed and untreated products were then milled by a four-break, 96% extraction procedure. Processed and untreated meals were formulated into self-rising meals and stored at 37°C for 6 months. Processed meal formulations were significantly (P < 0.05) more stable during storage than those from untreated meal as indicated by lower fat acidity values and greater carbon dioxide retention. Corn bread prepared from stored enzyme-inactivated meal had greater volume and maintained more uniform shape than that from stored untreated meal. 相似文献
20.
棉籽粕中棉酚的超声辅助脱除研究 总被引:1,自引:1,他引:1
棉籽蛋白类似大豆蛋白,是一种营养价值高且具保健功能的蛋白质。而棉酚的存在严重影响棉籽蛋白的应用并造成蛋白质资源的浪费。采用超声波辅助盐酸-乙醇溶液脱除法及响应面设计法对棉子饼粕中棉酚的脱除工艺进行研究。在单因素的基础上,选定液料比、超声时间、超声温度及盐酸浓度4个因素,通过响应面分析以及岭嵴分析得到了优化组合条件。最佳工艺条件是:液料比23∶1,超声时间53 min,超声温度77℃,盐酸浓度1.5 mol/L,超声功率50 W,棉酚脱除量为9.5 mg/g。脱酚后的棉籽粕含蛋白质为57.17%,比脱酚前提高7.52%。 相似文献