共查询到20条相似文献，搜索用时 37 毫秒
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本文介绍了美国的犹太教考肖证书的起源和作用,提供了考肖产品市场关于食品和食品添加剂的主要禁忌和规定,对于食用香料和添加剂的生产、出口企业有一定的参考价值。 相似文献
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今年是中国微量元素科学研究会成立三十周年,从这一跨学科一级学会三十年发展的四个阶段,重点阐述了江苏、湖北、安徽、上海、广东对人体必需微量元素硒、锌、铬在防治地方病、肿瘤、心血管疾病、代谢性疾病和检测方法及基础研究的研究成果,通过对14次全国微量元素学术研讨会的论文总结显示,中国的微量元素研究前景光明。 相似文献
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《分离科学与技术》2012,47(3):310-321
A thirty stage 5 cm annular centrifugal contactor cascade was assembled and tested to obtain thermal profiles during both ambient and heated input conditions of operation. Thermocouples were installed on every stage as well as feed inputs, and real-time data was taken during experiments lasting from two to eight hours at total flow rates of 0.5 to 1.4 liters per minute. Ambient temperature profile results show that only a small amount of heat is generated by the mechanical energy of the contactors. Steady state temperature profiles mimic the ambient temperature of the lab but are higher toward the middle of the cascade. Heated inlet solutions gave temperature profiles with smaller temperature gradients, more driven by the temperature of the inlet solutions than ambient lab temperature. Temperature effects of solution mixing, even at rotor speeds of 4000 rpm, were not measurable. 相似文献
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Ian Gailey 《Coloration Technology》1978,94(4):132-138
This paper on research and development was presented at the Society's 1977 Biennial Symposium - The Efficient Use of Resources in Textile Coloration - held at Lancaster University. The Chairman for the session was Mr B.A. Townsend (Courtaulds Ltd). 相似文献
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Barry L. Loeb 《臭氧:科学与工程》2009,31(5):379-392