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 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。
• They also dramatically increase free radical generation in the brain.
  他们还大幅增加自由基的生成在大脑中。
• Iron and copper increase oxidative stress ( free radical damage), which is a major problem in CFIDS.
  增加铁和铜的氧化应激（自由基损伤），这是一个重大问题在CFIDS。
• 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。
• 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。
• 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；
• Furthermore, the mechanism of free radical scavenging reactions of Magnolol and Honokiol were proposed.
  此外，初步探讨了其自由基清除活性反应机理。
• The high quality high-solids hydroxyl acrylic resins with low viscosity were prepared by free radical polymerization.
  合成的改性物对羟基树脂有极好的相容性，可以与羟基丙烯酸树脂配成涂料。
• 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。