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

• 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。
• 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 Effect of Dioxin on Expressions of AhR Genes and the Free Radical
  二恶英中毒对AhR基因表达和自由基水平的影响
• Protein helps repair cells that have suffered free radical damage.
  蛋白质帮助修复被自由基破坏的受损细胞。
• 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。
• 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 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 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。
• 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。
• Status of free radical and water in ultradried seeds with distinct moisture content were investigated in safflower seed.
  研究了不同超干度的红花种子自由基和水分状态。