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食品防腐剂对人体健康的影响及发展趋势 总被引:8,自引:0,他引:8
防腐剂作为一种重要的食品添加剂,具有杀死微生物和抑制其繁殖的作用,应用十分广泛。本文对国内常用食品防腐剂的生产、使用及对人体健康的影响进行综述,阐述了我国食品防腐剂的主要发展趋势为天然化和复合化。 相似文献
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Food powders are presented and discussed according to food sciences specificities and according to powder engineering concepts. Food powders are very present in everyday life. They are generally obtained from agricultural raw materials by different processes such as fragmentation or spray-drying processes. Amongst the food products, the food powders are easy to preserve, transport, store, weight and process. They are used to bring specific functionalities (e.g. physicochemical stability, microbiological stability, organoleptic qualities and nutritional composition). As well as food products, food powders are complex systems that can be defined by a great dispersion in their properties caused by: (i) the complexity of the chemical composition of the agricultural raw materials; (ii) the heterogeneity of the native structures of the product; (iii) the reactivity under high temperature or water addition; (iv) the variability of the agricultural raw materials behavior. Food companies, equipment suppliers, and scientists became aware of the relevance of a global approach by integrating the food powders engineering approach (particles properties, powder reactivity, and powder processing) to the classical food sciences concepts. The aim of this article is to highlight the stakes and opportunities concerning food powder processing and particles properties. 相似文献
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食品安全直接关系着人类的健康发展,食源性致病菌是影响食品安全的主要因素之一,食品中病原微生物的传统检测技术操作繁琐、周期长,因而发展快捷、可靠、特异的食品病原微生物分析检测技术对食品安全和全人类的健康发展有着非常重要的意义。本文对当前主流的几种快速检测技术进行了总结分析,并对发展新的食品中病原微生物快速检测技术进行了展望。 相似文献
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“民以食为天”,随着人民生活水平不断提高,人们关心食品不仅仅是“食以果腹”,更多地是关心食品的营养、安全卫生、贮藏、综合利用等问题。本文在描述“食品化学”的定义的基础上,说明食品化学在食品安全、打击伪劣食品、食用产品加工质量、食品资源的综合利用中所起的作用,论述了食品化学对人类健康的重要性。 相似文献
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食物对于口腔癌的发病与机理影响非常明显。以某地的谷物含量及抑制效果等分析,希望为人们食物安全的选择提供参考。实验样品含量依据国际人体摄入量标准,符合人体标准要求。实验分析表明:随着浓度的提高吸光度也明显逐渐升高,验证了样品与氧化度成正比例关系;自由基的消除能力随着浓度增加而增大,自由基的消除能力明显较大;样品随着浓度的增加抑制作用有一定的提高,实验处理的脂质过氧化表现了明显的抑制效果;样品的亚硝酸盐的清除能力的抑制效果一般。 相似文献
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Significance of Antioxidants in Nutrition Optimal nutrition of livestock and profitable animal production are not possible without approved additives of antioxidants established in feedstuffs regulation for a long time. A deficiency of vitamin E and selenium furthermore lead to suboptimal performances and also to diseases. A frequently supplementation of vegetable oil in pig and poultry feed with high contents of linoleic and linolenic acid will lead to high accumulation of these fatty acids in body fat. Consequently the oxidation stability decreases which can be improved decisively by tocopherols. Supplementation of vitamin E and selenium with a maximum level of 500 μg/kg feed combined with an accumulation in animal foodstuffs is important to human requirements of these essential agents. Compared to animal nutrition the recommendations for human requirements (DGE) of both antioxidants are to low. 12 mg tocopherol and 20 to 100 μg selenium are deficient to react on different processes of oxidation in human organism. A considerably improved vitamin E and selenium supply can not be covered by normal food intake. Therefore the use of concentrates is more efficient like in animal nutrition. This type of prophylaxe should be more applicated in health providence. Not only a high life expectancy should be achieved but also a good health condition within this life time. 相似文献
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FAO/WHO食品添加剂和污染物联合专家委员会(简称JECFA)是国际食品添加剂与污染物安全评价的权威机构,对世界各国所用食品添加剂的安全性进行评价。食品乳化剂是食品工业中一类重要的使用广泛的添加剂。介绍了JECFA关于食品乳化剂的主要品种及使用情况,总结了JECFA对食品乳化剂的安全性评价意见及规定标准。 相似文献