尿嘧啶

In order to further explore the relationship between this effect and the synthesis of RNA and DNA in the neurons, an autoradiography of 3~H-uridine and 3~H-thymidine was used.

本文应用3~H-尿嘧啶核苷和3~H-胸腺嘧啶核苷放射自显影术，进一步研究该作用与神经元合成RNA和DNA的关系。

In order to further explore the relationship between this effect and the synthesis of RNA and DNA in the neurons, an autoradiography of 3H-uridine and 3H-thymidine was used.

本文应用~3H-尿嘧啶核苷和~3H-腺胸嘧啶核苷放射自显影术进一步探讨此作用与神经元合成RNA和DNA的关系。

Uracil also can be introduced by hydrolytic deamination of cytosine which paired with guanine. Highly mutagenic dU:dG mispair may cause a C→T transition mutation upon replication if it was not repaired.

另一种可能则是由胞嘧啶(Cytosine； C)发生自发性或氧化脱胺反应而形成尿嘧啶与鸟粪嘌呤的配对错误。

RNA editase transforms or modifies the nucleotide of pre-RNA by deaminization, and hydrolytic deaminize C6 amino group of the adenosine at the specific RNA site, changing adenosine to inosine or changing cytosine to uracil,but inosine was recognized as guanine in mRNA.

RNA编辑酶以脱氨方式使得RNA特异位点的腺嘌呤脱氨转变为次黄嘌呤，或者是特异位点的胞嘧啶变为尿嘧啶，而次黄嘌呤在碱基配对时被识别为鸟嘌呤。

In accordance with the fact that 5-brom-odeoxyuridinecan incorporate period-ically into the nuclear DNA to substitutethe thymidine in DNA,we devoloped a newbasic fuchsin staining method in which weused BrdU as a chromosomal marker in in situnick translation of chromosomes.

根据5—溴脱氧尿嘧啶核苷可周期性替代DNA链中的胸腺嘧啶核苷而显示不同细胞周期染色体的特性，我们用BrdU作为染色体的标记，首次建立了一种硷性复红染色的染色体原位切口移位的新方法。

Purine base found in DNA and RNA; pairs with thymine in DNA and with uracil in RNA.

DNA和RNA中的嘌呤碱，与DNA中胸腺嘧啶和尿嘧啶成对。

Uracil has a PYRIMIDINE ring structure, and is derived from sugars and amino acids.

尿嘧啶具有嘧啶环结构，可由糖或氨基酸产生。

It was also found that thymine and uracil had different sensitivities to N+ and Ar+.

研究还发现胸腺嘧啶和尿嘧啶对低能N+和低能Ar+的辐射敏感性不同。

Three kinds of fluorescence polymer with the structure of acridine yellow were synthesized and the sensor for measuring nucleic acid was also fabricated.

论文第三部分开展了以荧光高分子为敏感试剂的新型光化学传感器载体研究，合成了N，N-二甲氨基对苯甲醛缩醛类聚合物，考察了苯环上不同取代基对荧光性能的影响，研究了该类敏感膜对乳酸、尿嘧啶、胸腺嘧啶和腺嘌呤的响应性能；合成了三种具有吖啶黄结构的荧光高分子，制成了测定核酸的传感器。

The conformational properties of 6 possible tautomers of 5-fluorouracil or 5-chiorouracil were studied by using HF/3-21G method.

采用HF/3-21G方法，对6种气相和水相中可能存在的5-氟尿嘧啶（和5-氯尿嘧啶）互变异构体进行了构象分析。

Shop assistant: Please check at the door.

店员：请您到门口柜台交费。

In the end, transportation of PAHs in the environmental matrix was preliminarily investigated and discussed according to PAHs data of soils and sediments from a certain region in Shanghai. The result indicated that there are two or more pathways on PAHs transportation in the environmental matrix.

最后，对上海特定地区内PAHs在环境介质中的迁移径途进行了分析讨论，结果表明上海市土壤和沉积物等环境介质中PAHs的迁移存在多种途径。