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

• 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。
• 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。
• 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；
• 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
• 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。
• 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。
• 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。
• 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。
• 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 anti-oxidizing function can prevent the aging of skin caused by free radical.
  具有抗氧化功能，可抵御自由基所造成的肌肤老化。