嘌呤碱基

方法：28只大鼠随机分成对照组、吗啡依赖组、吗啡依赖+嘌呤碱基组、吗啡依赖+嘌呤核苷组，每组7只。通过热敏感甩尾实验，记录大鼠热敏感甩尾潜伏期；

Methods Twenty-eight Wistar rats were randomly divided into ( 4 groups : ) control group , morphine dependent group , morphine plus purine bases group and morphine plus purine nucleosides group , there were 7 rats per group .

电化学预处理玻碳电极微分计时电位溶出法测定DNA中的嘌呤碱基及DNA浓度

Differential Chronopotentiometric Stripping Method for the Deter-mination of Purines and DNA Concentration Using an Electrochemically Pretreated Glassy Carbon Electrode

由于硝基咪唑基团对鸟嘌呤、腺嘌呤碱基优先结合的特性，TbL能够通过一定的插入作用与DNA的嘌呤碱基选择性结合。

TbL selectively interacts with purine nucleobases in DNA with some intercalative mode owing to the preferred binding of nitroimidazole moieties with guanine and adenine bases .

尿酸是人体嘌呤碱基分解代谢终产物，经肾脏排泄。

Uric acid as the end-product of purine metabolism in human body is excreted through kidney .

结果：与对照组相比，吗啡依赖组、吗啡依赖+嘌呤碱基组、吗啡依赖+嘌呤核苷组均产生明显的药物抗痛觉效应（P<0.05）；

Results In morphine , morphine plus adenine and guanine , and morphine plus adenosine and guanosine groups , significant antinociceptive effects were observed as compared with control group ( P < 0.05 ) .

核酸水解产物嘌呤、嘧啶碱基在BDS柱上的分离及测定

Separation and Determination of Purine Bases and Pyrimidine Bases from Nucleic Acid Hydrolysis by HPLC on BDS Column

单核苷酸磷酸、糖、嘌呤或嘧啶碱基中的一种，它组成的一个分子的苷酸。

A nucleotide consisting of one molecule each of a phosphoric acid , a sugar , and either a purine or a pyrimidine base .