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单词 氨酸
释义 〔triiodothyronine〕A thyroid hormone, C15H 12I 3NO 4, similar to thyroxine but more potent, used in the treatment of hypothyroidism. 三碘甲腺氨酸:一种甲状腺激素,C15H 12I 3NO 4,类似于甲状腺素,但生理作用较之为快且强,用于治疗甲状腺机能减退 〔nitrogen〕A nonmetallic element that constitutes nearly four fifths of the air by volume, occurring as a colorless, odorless, almost inert diatomic gas, N2, in various minerals and in all proteins and used in a wide variety of important manufactures, including ammonia, nitric acid, TNT, and fertilizers. Atomic number 7; atomic weight 14.0067; melting point -209.86°C; boiling point -195.8°C; valence 3, 5. See table at element 氮:一种非金属元素,按体积计算约占空气的五分之四,是一种无色、无味几乎为惰性的双原子气体,N2,存在于各种矿物和所有的蛋白质中,广泛地运用于各种重要的生产中包括生产氨酸、硝酸、黄色炸药以及化肥。原子序数7;原子量14.0067;熔点-209.86°C;沸点-195.8°C;化合价3,5 参见 element
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