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

• 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；
• 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。
• 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。
• The role of oxygen free radical in experimental keratitis a minute hairlike projection on mucous membrane.
  氧自由基在实验性角膜炎中的作用黏膜上起保护作用的细小的毛。
• 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。
• 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 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。
• 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。
• 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。
• Antioxidants are also called free radical scavengers.
  抗氧化剂也被称为自由基的清道夫。