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 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。
• Secondary inflammatory reaction and free radical damage existed in the tissue around intracerebral hemorrhage.
  脑出血后血肿周围存在继发炎性反应与自由基损伤。
• 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；
• 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。
• 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。
• 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。
• 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。
• 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。
• 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。
• 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。