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free radical

英 [ˌfriː ˈrædɪkl]

美 [ˌfriː ˈrædɪkl]

n.  自由基; 游离基

医学化学

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
          1. in the body free radicals are high-energy particles that ricochet wildly and damage cells
          Synonym:radical

        双语例句

        • 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。
        • 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 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。
        • Abstract: A water dispersed SBS grafted polymer was synthesized by free radical polymerization.
          文摘:采用自由基接枝共聚的方法合成了亲水性SBS接枝丙烯酸共聚物,同时进行了结构表征。
        • 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。
        • This reaction has been classified as a free radical chain process.
          这种反应是按自由基连锁反应的历程进行分类的。
        • 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;
        • They are large molecules that are able to maintain stability even if they are in a free radical form.
          抗氧化剂是很大的分子团,即使是在自由基的状态下它们仍能保持稳定。
        • The majority of vinyl monomers can be used for free radical polymerization catalyst.
          乙烯基类单体大多数可以采用游离基型催化剂进行聚合。
        • Study on the ability of scavenging free radical of the different extracts from leaves of Eucalyptus
          桉树叶不同提取物对自由基的清除能力研究