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

• Abstract: A water dispersed SBS grafted polymer was synthesized by free radical polymerization.
  文摘：采用自由基接枝共聚的方法合成了亲水性SBS接枝丙烯酸共聚物，同时进行了结构表征。
• 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。
• 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。
• 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。
• Study on the ability of scavenging free radical of the different extracts from leaves of Eucalyptus
  桉树叶不同提取物对自由基的清除能力研究
• 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。
• OBJECTIVE: To study the effects of anaerobic interval training on free radical metabolism in rats.
  目的：观察无氧间歇训练对大鼠体内自由基代谢的影响。
• Copper-containing enzymes play important roles in iron and catecholamine metabolism, free radical scavenging, and in the synthesis of hemoglobin, elastin and collagen.
  含铜的酶在铁和儿茶酚胺的代谢、自由基清除、合成血红蛋白、弹性蛋白和胶原蛋白中发挥重要作用。
• 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。