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

• 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。
• 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 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。
• 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。
• 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。
• Free Radical Scavenging Effects of Extracts from Various Parts of Citrus
  柑橘不同部位提取物对羟自由基的清除作用研究
• 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。
• 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。
• 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。
• 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。