尿嘧啶

The antitumor activity results show that most cantharidin derivatives inhibit the growth of the PC-14 and A 2780 tumor cells at the dose of 100μg/ml.

结果表明：所合成的化合物的抑瘤率，特别是100μg／ml药物浓度下的抑瘤率和对照品5-氟尿嘧啶的抑瘤率相当，显示了较好的抑瘤效果。

The microparticles were prepared by the solvent/non-solvent method, using biodegradable poly-3-hydroxybutyrate PHB as the scaffold to capsulate the 5-Fu.

为降低该类药物的释放速度，首先利用溶剂非溶剂法，以生物可降解的聚羟基丁酸酯为骨架，制备了抗癌药物5-氟尿嘧啶的微粒。

Uracil and fuzinoside may be the cardiotonic components of aconite roots.

从附子水溶液部分分离得到尿嘧啶、附子苷是附子中强心成分。

Because of its specificity and heat-unstable, UNG is effectively used in overcoming carry-over contamination in PCR.

利用UNG对尿嘧啶的特异性识别作用和对热不稳定的特性，将它用于PCR技术中可有效地防止结转污染造成的假阳性。

Objective: Study the anti-tumor effects of asiatic acid combined with chemotherapeutics cyclophosphamide or 5-fluorouracil (5-Fu).

目的：研究积雪草酸(asiatic acid， AA)与化疗药物环磷酰胺，5-氟尿嘧啶(5-Fu)联用的抗肿瘤作用。

ABSTRACT: Objective To study the role of survivin in choriocarcinoma cell JAR apoptosis induced by 5fluorouracil (5Fu).

目的 探讨生存素在化疗药物5氟尿嘧啶(5Fu)诱导的人绒癌细胞株凋亡中的作用。

A strong A-T bias was found in the nucleotide sequence of mitochondrial genome of the Mongolian wolf. All the transfer RNA genes could be folded into the typical cloverleaf-shaped structure except tRNA-Ser, which lacked the "DHU" arm.

序列碱基的组成存在明显的A-T偏好性。tRNA基因中除tRNA-Ser缺少双氢尿嘧啶臂以外，其余均能折叠成典型的三叶草二级结构。

Cancer patients receiving drugs, long-term use of certain chemicals such as common gentamycin, received allopurinol, hyperthyroidism, sulfur uracil, three pairs of ketone, propranolol, dilantin sodium, aspirin, indomethacin, contraceptive and cause trichomadesis.

肿瘤病人接受抗癌药物治疗，长期使用某些化学制剂如常用的庆大霉素、别嘌呤醇、甲亢平、硫尿嘧啶、三甲双酮、普萘洛尔、苯妥英钠、阿司匹林、消炎痛、避孕药等常引起脱发。

Results Stable drug-resistant SW1990/GZ cell strain was established by culturing with gemcitabine for 9 months. The morphology and growth characteristics of the cell strain changed remarkably. The cells shrinked and became rounder; its endoplasm expanded; granular substances increased; and the doubling-time was prolonged. Resistance of the cell line to gemcitabine, fluorouracil, adriamycin, and mitomycin significantly increased. The TrxR activity of the drug-resistant cells was increased markedly.

结果 药物培养9个月后，得到稳定传代的SW1990/GZ耐药细胞株；其形态学、生长特征等均发生了明显变化，细胞变圆、体积缩小、内质网扩张、颗粒样物质增多及细胞倍增时间延长；对吉西他滨、5-氟尿嘧啶、阿霉素和丝裂霉素的耐药性均显著增加；耐药细胞的TrxR活性也明显增高。

The calculated results indicate that there are two absolutely opposite regions in the vicinity of 5-FU. In one of the regions, water molecules can assist the tautomerism from 5-FU to its enol form 5-FU(superscript *, whereas in another region, water molecules can protect 5-FU from tautomerizing to 5-FU(superscript *).

研究发现，在5-氟尿嘧啶周围存在两类不同的区域，在其中一类区域中，水分子能促进质子转移的发生；而在另一类区域中，水分子却能阻碍质子转移的发生。

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。