尿嘧啶

In SGC-7901 cells, 5-Fu can interfere with the DNA synthesis and result in the reduction of the DNA content. Besides, it can affect the unsaturation degree of the hydrocarbon chains and alter the external environment of guanine and adenine residues in cancer cells.

这说明5-氟尿嘧啶可以影响DNA的复制合成，降低胃癌细胞中DNA的含量，并且影响癌细胞中脂肪酸链的饱和度以及鸟嘌呤和腺嘌呤的外环境，正常细胞拉曼谱的改变说明5-氟尿嘧啶存在一定的副作用。

On the basis of spectroscopic analysis, they were identified as adenine, adenosine, ura...

根据光谱分析分别鉴定为：腺嘌呤，腺嘌呤核苷，尿嘧啶，尿嘧啶核苷和D-甘露醇等。

The structural and vibrational frequencies of Uracil in hydrated form is discussed.

对水合尿嘧啶分子中，尿嘧啶分子的结构和振动频率的改变做了讨论。

In the chapter 2, the process of N+ and Ar+ with different dose rate implanted into Uracil and Thyim\'ne and Uridine with different depths is studied.

第二章对不同剂量率下的氮离子和氩离子注入尿嘧啶和胸腺嘧啶样品以及氮、氩离子注入不同厚度的尿苷样品进行了研究。

Fluorouracil is a kind of popular antimetabolic drug used in clinic. It has the similar structure with Uralic, which is necessary to the cancer cell. It contents with Uralic in the same enzyme system, block the metabolic link, impeds the synthesis of DNA, and then prohibits the propagation of the cancer cells .

5-氟尿嘧啶(5-Fu)是一种在临床上已为人们所熟知的抗瘤谱广，有效率高的抗代谢药物，它的结构与肿瘤细胞代谢所必需的尿嘧啶相类似，在同一系统中互相竞争，阻断代谢环节，阻碍DNA的合成，从而抑制肿瘤细胞的增殖。

Methods:24 patients undergoing radical operations of intestinal carcinoma were abdominally implanted with the sustained release fluorouracil at the closure of abdominal surgery.

24例大肠癌患者根治术后，关腹前分多点植入缓释氟尿嘧啶，定时采集血样，以高效液相色谱法检测血中氟尿嘧啶浓度。

Acylamino acid-5-fluorouracil were prepared from acylamino acid chlorides and 5- fluorouracil in the presence of 〓.

邻苯二甲酰氨基酸酰-5-氟尿嘧啶则由邻苯二甲酰氨基酸酰氯与5-氟尿嘧啶在三乙胺的存在下制得。

Methods:5Fliorouracil was added to culture medium of BGC823 gastric cancer cells and continuously cultured for 5h or 10h,then the human gastric cancer cells were stained with haematoxylin Eosin、dyed with immunohistochemical method and acid Ulead citrate,which was observed under light and electiom microscope.

目的：探讨5氟尿嘧啶对人胃癌细胞的结构和GSTπ表达的影响。方法：在人胃癌BGC823细胞株培养液中加入5氟尿嘧啶，继续培养5h或10h，然后用HE、免疫组化染色和铀铅染色。

The B, C, D group each mouse right armpit department hypodermic vaccinates the H22 lump cell to hang fluid 0.2ml, after vaccinating 24h weighing, and starts the abdominal cavity injection to give the medicine: A, B group uses physiological saline 0.2ml/only (continuously to give medicine 14 days) every day, C group with 5 fluorine uracil mg/day, dilutes the density is mg/0.2ml (the 1~5th day for medicine), D group will put down with the physiological saline disappears the hitch to compound mg/only (continuously to give medicine 14 days).

依据随机化原则，将40只ICR雌性小鼠随机分为四组，分别为空白对照组，荷瘤对照组，5氟尿嘧啶组，平消栓组。B，C，D组每只小鼠右腋部皮下接种H22瘤细胞悬液0.2ml，接种24h后称重，并开始腹腔注射给药：A，B组每日用生理盐水0.2ml/只（连续给药14天），C组用5氟尿嘧啶25mg/kg（第1~5天给药），D组用生理盐水将平消栓配制成1.0g/kg（连续给药14天）。

he conformational properties of 6 possible tautomers of 5-fluorouracil or 5-chlorouracil 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。