free radical
英 [ˌfriː ˈrædɪkl]
美 [ˌfriː ˈrædɪkl]
n. 自由基; 游离基
牛津词典
noun
- 自由基；游离基
an atom or group of atoms that has an electron that is not part of a pair, causing it to take part easily in chemical reactions. Free radicals in the body are thought to be one of the causes of diseases such as cancer.
柯林斯词典
- 自由基;游离基
Free radicalsare atoms that contain one or more unpaired electrons. Free radicals are believed to be a cause of ageing, heart disease, and some cancers.
英英释义
noun
- an atom or group of atoms with at least one unpaired electron
- in the body free radicals are high-energy particles that ricochet wildly and damage cells
双语例句
- The role of oxygen free radical in experimental keratitis a minute hairlike projection on mucous membrane.
氧自由基在实验性角膜炎中的作用黏膜上起保护作用的细小的毛。 - Fluorine-containing polymer-base fatliquoring agent was prepared through free radical copolymerization with maleic anhydride and natural oil.
通过动、植物油与马来酸酐共聚，然后用十二氟庚醇和高级脂肪醇酯化，合成了含氟聚合物加脂剂。 - This investigation reveals that carminic acid has certain free radical scavenging activity, thereby providing a food additive.
结果表明胭脂红酸是一种对自由基具有一定清除活性的食品添加剂。 - We studied the effect of scavenging hydroxyl free radical by Se-polysaccharide and Se-protein under the best condition of Fenton system.
结果表明：硒多糖和硒蛋白清除羟自由基的效果比与之相同浓度的无机硒和相同浓度的多糖及蛋白都要明显； - Vitamin E is the main body of biological free radical scavenger and antioxidant one.
维生素E是体内最主要的生物自由基清除剂和抗氧化剂之一。 - The oxygen free radical scavenging activities and anti-lipoprotein oxidative effects of green tea polysaccharides were studied.
研究绿茶多糖体外清除氧自由基与抗脂蛋白氧化作用。 - The anti-oxidizing function can prevent the aging of skin caused by free radical.
具有抗氧化功能，可抵御自由基所造成的肌肤老化。 - Objective To investigate the mechanisms of nonenzymatic glycosylation inducing myocardial aging and free radical theory.
目的以非酶糖基化和自由基学说探讨心肌老化的发生机制。 - The paper reviewed the modification of chitosan by free radical polymerization and atom transfer radical polymerization ( ATRP), emphasized the application of ATRP on graft copolymerization of chitosan.
综述了普通自由基聚合和原子转移自由基聚合（ATRP）反应对壳聚糖及其衍生物进行修饰改性的研究现状。着重介绍了ATRP技术在壳聚糖接枝改性方面的应用。 - Mitochondria play an important role in energy metabolism, free radical production, aging and cell apoptosis.
线粒体在能量代谢、自由基产生、衰老、细胞凋亡中起重要作用。