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

• 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。
• 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 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。
• Objective to study the scavenging effect of Cheqiancao on oxygen free radical.
  目的研究车前草对氧自由基的清除作用。
• 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。
• 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。
• Conclusion Formaldehyde can injury free radical eliminated system to cause lung injury.
  结论：甲醛可损伤小鼠自由基清除系统。
• 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。
• 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。
• 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。