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论文摘要翻译

 来源: 我要去减肥网   作者: 许小八   

问题描述:论文摘要翻译
共轭亚油酸(conjugated linoleic acids,简称CLA)是一系列含有共轭双键、具有位置异构和几何异构的十八碳二烯酸,是必需脂肪酸亚油酸的异构体。自从1978年Pariza等发现煮过的牛肉中存在一种显著的抗突变活性物质CLA以来,人们相继研究发现CLA具有抗癌、抗粥样动脉硬化、减肥、抗氧化、促进生长发育、防治糖尿病、增强免疫能力等生物活性[1]。作为一种新型的功能性油脂CLA及其无毒的衍生物如盐类可以添加到人或动物的日常食品中,对人及动物具有很好的保健作用。专家建议,人们每天所需补充的共轭亚油酸量为每天摄取食物重量的0.01%-2.00%,按每天进食量为1千克计,则每天需补充共轭亚油酸1-3克左右较为适宜。1994年开始,在美国等西方国家,CLA已作为一种新型保健品投放市场。但是由于CLA很容易氧化变性,使其失去生理活性,这给生产储存带来一定的困难,而与CLA相比,CLA的甘油酯在保持其生理和营养功能的同时, 氧化稳定性好、气味和味道更平和、更易于被人体和动物吸收[2],是一种重要的低热量油脂替代品和药物中间体合成原料[3]。用传统化学方法合成甘油酯多采用强碱(KOH、NaOH)等作催化剂,存在反应温度过高,产品色泽差,需要水洗、中和、干燥等后处理工序,并且设备腐蚀严重、有三废排放、对环境造成污染等缺点[4]。张亚刚等人研究了以共轭亚油酸乙酯、甘油为原料, 无水K2CO3为催化剂合成共轭亚油酸甘油酯,反应温度高达140℃,且产品颜色较深,反应过程及产品后处理复杂。而酶催化法具有反应条件温和、产物选择性高及对环境友好等优点,但是目前国内外多以酯交换法进行的脂肪酶催化合成甘油酯[5],一般反应时间都较长,且酶的储存要求较高,这就增加了生产成本,不利于工业化生产。近年来,人们开始对固体酸催化剂进行研究和开发。超强酸离子交换树脂、分子筛、杂多酸、负载型固体酸催化剂等作为酯化反应中的催化剂越来越受到人们的关注。它们具有反应条件温和,稳定性好,催化活性高,后处理简单,选择性和重复使用性高,从而提高了经济和社会效益,成为近年来研究的热点。但是用固体酸作催化剂仍然没有改变产物的色泽,所合成的酯的颜色很深。因此本文研究了无催化剂催化作用的情况下合成酯的工艺情况。

回答1:就是这篇学术论文一个总结性的概述,通过读完学术论文摘要能大致了解这篇文章的研究目的研究方法研究原因研究结论等
还是不行的话试试搜索下面问题:
学术论文中abstract是摘要,那下面的introduction翻译成什么
下面是一篇学术论文摘要,请根据其信息内容提取四个关键词...
下面是一篇学术论文摘要,请根据其信息内容提取四个关键词...
学术论文的书写格式哪位知道??比如要有什么摘要,关键词什么...

回答2:Conjugated linoleic acids conjugated linoleic acid (CLA) is a series, referred to as conjugate double-bond contains heterogeneous and geometry and position of the heterogeneous 18 carbon acid is essential fatty acids, linoleic acid. Since 1978 Pariza found boiled beef as a significant antioxidant mutations, active substance clas have study found people with cancer, CLA atherosclerosis arteriosclerosis, reduce weight, anti-oxidation, promote the growth and prevention of diabetes, enhance immunity and other bioactivity [1].As a kind of new functional oils CLA and non-toxic derivatives such as salt can be added to the person or animal the daily food for people and animals, have very good health. Expert proposal, the daily need complement of conjugated linoleic acid intake of food for the weight of every day, according to 2.00% 0.01-1 kilogram plan into food, daily supply of conjugated linoleic acid (1-3 grams is relatively appropriate. In 1994, in western countries such as America, CLA has, as a new products on the market.But because the CLA easy oxidation degeneration, make its physiological activity, it lost production, storage, and bring some difficulties, compared with the CLA of ontdoor type in keeping their clas and physiological function, oxidation stability, smell and taste more peaceful and more easily absorbed by human and animal [2], is a kind of important low in calories and fat substitutes drug intermediates synthetic materials

回答3:Conjugated linoleic acid (conjugated linoleic acids, referred to as CLA) contains a series of conjugated double bonds, with positional isomers and geometric isomers of octadecadienoic acid, are essential fatty acids linoleic acid isomers. Pariza, etc. Since the discovery in 1978 of beef cooked in the existence of a significant anti-mutagenic activity of substances CLA, there has been one after another study found that CLA has anti-cancer, anti-atherosclerosis arteriosclerosis, lose weight, anti-oxidation, promote the growth and development, prevention and treatment of diabetes, enhanced biological activity, such as immunity [1]. As a new type of functional fats CLA and its derivatives such as non-toxic salts can be added to the human or animal food in the day-to-day, the people and animals with good health care role. Experts recommend that people every day to add the required amount of conjugated linoleic acid intake of food every day the weight of 0.01% -2.00% per day for food intake of one kilograms, a daily supplement of conjugated linoleic acid to be one -3 grams more appropriate. Beginning in 1994, in the United States and other Western countries, CLA has been used as a new type of health care products market.

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