氟

The results showed that the degrdation rate of fluorobenzene by TiO2/SnO2 coating rosed from 71.9% to 90.1% compared with pure TiO2 coating. The apparent rate constant k of the photocatalytic degradation is related to the initial concentration of fluorobenzene and the reaction order is zero. The corresponding degradation rate of aldehyde with the concentration of 100ppm rosed from 69.2% to 91.4% and the reaction order is one.

结果表明：与未改性涂料相比，SnO2改性涂料的活性对氟苯的降解率由71.9％提高到90.1％，反应表观速率常数与降解液初始浓度有关，光催化降解氟苯属于零级反应；对100ppm乙醛的降解率由69.2％提高到91.4％，光催化降解乙醛属于一级反应。

The fluoroalkylsilane film was synthesized by using trimethylchlorosilane, fluosilicic acid and water as the precursors.

采用溶胶-凝胶法，以三甲基氯硅烷、氢氟硅酸和水为先驱体，在玻璃基片上用提拉法制备出一种含有-CF3强疏水性基团的氟硅烷薄膜。

It divided into two steps to prepare cryolite from fluosilicic acid, in the second step, cryolite is manufactured through the reaction of the ammonium fluoride solution with the sodium sulfate and the aluminum sulfate.

氟硅酸制取冰晶石分两步进行，第二步用得到的氟化铵溶液与硫酸钠和硫酸铝反应制冰晶石。

Fluosilicic acid is the by-product in production of phosphate fertilizers.With certain temperature,adjusted pH,and controlled reaction time,fluosilicic acid was dissolved in the solution of ammonia liquor,and then runny paste of silica and solution of ammonium fluoride were obtained after seperating the reaction slurry.

采用氨水在一定温度下与磷肥行业副产品氟硅酸反应，调整pH，控制反应时间，反应后得到的料浆，经过滤得白炭黑软膏和氟化铵溶液。

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。

Three dimensional (3D) honeycomb-like porous structures made up of nanoslices of hydroxy cupric phosphate heptahydrate Cu8(PO3OH2(PO4)4·7H2O single crystals were constructed by a facile assistant surface oxidation technology. The pore size of the 3D structure ranges from hundreds of nanometers to two micrometers, and the thickness of the two dimensional (2D) nanoslices is about 50~100 nm. The wettability of the porous surfaces was transformed from superhydrophilic to superhydrophobic by chemical modification with octadecanethiol or PDES.

相对于硬脂酸修饰表面，氟硅烷修饰表面对水滴具有更低的接触角滞后和较低的黏着，这可能是因为氟硅烷比硬脂酸具有更低的表面自由能所致。2、利用酸辅助的表面氧化技术制备了由Cu8(PO3OH)2(PO4)4·7H2O单晶组成的三维蜂巢状多孔结构，孔尺寸约为几百纳米到2微米，二维的纳米片厚度为50~100 nm。

College of Veterinary Medicine, China Agricultural University, Beijing 100094, China Abstract: A method has been developed to determine residual stilbenes such as diethylstilbestrol, dienestrol and hexestrol in animal tissues using solid phase extraction and gas chromatography-mass spectrometry.

动物组织样品在碱性条件下用乙酸乙酯提取，经碳酸钠溶液液-液分配净化，再用硅胶柱固相萃取净化，洗脱液均分成两份后经氮气吹干，分别用双三甲基硅基三氟乙酰氨和七氟丁酸酐衍生，采用选择离子监测模式进行测定，外标法定量。

Five experimental water bodies in contrast with Ganggeng Lake were chosen according to water fluoride concentration,and their hydrochemistry characteristic and the fluorine distribution of main economic fish were analyzed.

2003~2006年，先后调查了内蒙古自治区153个渔业水体的氟含量，并根据其浓度梯度选择了5个试验水体和1个对照水体，分析了其水化学特征及其主要经济鱼类各组织器官的氟含量分布情况。

Its solution behaviors are similar to and even better than those of corresponding polyelectrolytes singly modified with the same hydrophobe to the added surfactant.

通过溶液共聚，将碳氢和氟碳这两种疏水单体无规地接枝到聚电解质主链上，得到的这类混合改性的聚电解质无论与碳氢小分子表面活性剂还是与氟碳小分子表面活性剂作用均表现出和同种大分子表面活性剂与小分子表面活性剂作用时相似甚至更好的缔合情形。

objective to explore the curative effects and safety of fluoxetine in senile hypertensive patients with depression .methods 72 senile patients were randomly divided into: control group(n=36) treated with benazepril 10mg/d routine hypotensor therapy and research group(n=36) with combination of benazepril 10mg/d and fluoxetine 20mg/d and psychotherapy for 6 weeks.

目的 探讨氟西汀治疗老年性高血压合并抑郁障碍的疗效及安全性。方法将72例老年性高血压合并抑郁障碍患者随机分为研究组36例和对照组36例。两组患者均给予苯那普利10mg？d-1？po常规降压治疗，研究组在常规治疗的基础上加服抗抑郁剂氟西汀20mg？

The basic concept of FOP can be summarized as to further optimize effective prescription according to the standard of curative effects and with the aid of modern science and technology and theories of traditional Chinese medicine.

其基本内涵可概括为：以确有疗效的中药复方为研究对象，以现代科学技术和传统中医药理论为技术支持，以该复方所治病证的药效响应为评价标准，以优化重组疗效更优的新复方为研究目的。

Ever since our world has been a world, native forests have been indiscriminately exploited by man.

自从我们的世界一直是世界原生森林被任意剥削人。