氟

The results show that Yb(OSO2C8F17)3 and C10F18 were the best catalyst and fluorous solvent respectively.

研究表明，Yb(OSO2C8F17)3和C10F18分别是最好的氟代催化剂和氟溶剂。

Methods By use of random sampling, 200 5yearold and 200 12yearold children from nonferrous metal industrial areas and the same number children from nonindustrial areas were examined, which included conditions of dental caries, oral hygiene and dental fluorosis in 12 yearold children. Meanwhile, fluoride concentration in drinking water was measured. Results For the 5 yearold children, the prevalence and DMF index had no statistical difference between the industrial areas and nonindustrial areas.

选择有色金属基地儿童作为研究对象，以临近非工业区作为对照区，采用随机抽样的方法分别抽取有色金属工业区与非工业区5岁和12岁儿童各200名，共800名，调查儿童龋病患病状况、口腔卫生状况和12岁儿童氟牙症状况，并测定当地饮水氟质量浓度。

For the 12 yearold children, the prevalence, SiC index and DMF index showed markedly higher in industrial areas than in nonindustrial areas. Still more, the dental fluorosis index was near the epidemic.The oral plaque index demonstrated lower in the industrial areas than that in nonindustrial areas.The fluoride concentration in drinking water was under the national criterion in both areas(1.0 mg/L).

结果 工业区和对照区5岁组儿童龋病发病率差异无统计学意义，工业区12岁组儿童龋病发病率显著高于对照区同组水平，且氟牙症指数处于流行边缘；工业区2组儿童的菌斑指数显著低于对照区；工业区SiC高于对照区；两地水氟质量浓度均小于1.0 mg/L。

Their 95% effective concentration (EC95) value was 0.4735 μg/mL. Flumorph at the concentration of 0.5 μg/mL, can lead the inhibit rate of growth of mycelium, formulation of sporangium and germination of zoospore of Phytophthora sojae to 100%, the concentration was lower than Apron XL, Metalaxy which lead to the same inhibition rate. It indicated that Flumorph can obviously inhibit the growth of P.sojae in vitro, and effect is better than that of Apron XL and Metalaxy.

结果表明：氟吗啉对所测定的菌株4个发育阶段均有显著的抑制作用，氟吗啉对大豆疫霉菌菌丝生长EC50 值为0.1906μg/mL，EC95 值为0.4735 μg/mL；在0.5 μg/mL 浓度下对大豆疫霉菌孢子囊形成和孢子萌发抑制率达100%，低于达到相同抑制效果的金阿普隆和甲霜灵；说明该药剂在离体条件下能够有效抑制大豆疫霉菌的生长，效果好于金阿普隆和甲霜灵。

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。

It is the fluorosilicic ion that exsits in the slurry and plays an important role in flotation, fluorosilicic ion not only reacted with Fe〓 on the surface of aegirine to form ionic compound, but also formed stable Si-F bond in Si-O etching reaction. Only ionic compound was obtained when it was attached to hematite surface according to the theories of coordination chemistry, Compared with SiF〓, Fatty acid ion preferentially acts with Fe〓 on the minerals surface, therefore, SiF〓 Can't obstruct the adsorption of collector on the surface of hematite completly, but can reduce the flotation recovery of aegirine selectively.

运用FTIR、XPS等测试方法仔细研究了氟硅酸盐抑制剂对含铁硅酸盐钠辉石的选择性抑制作用机理，氟硅酸盐在弱酸性条件下对赤铁矿浮选的抑制作用很微弱，而对含铁硅酸盐钠辉石强烈抑制，从而扩大了两者之间的浮选差异；SiF〓是矿浆中起抑制作用的主要成分，SiF〓不仅与钠辉石表面的Fe〓形成离子型配合物，而且还与Si-O键形成稳定的Si-F共价键，而与赤铁矿表面只能形成离子型配合物，根据晶体配位场理论，与SiF〓相比较羧酸根离子将优先与矿物表面Fe〓发生配位作用，因此SiF〓的存在并不能完全阻碍捕收剂在赤铁矿表面的吸附作用，却能够选择性地抑制钠辉石的上浮。

Bastnaesite crystal about 12×20 mm in size collected from a pegmatitic aegirine augitebarite-bastnaesite vein of the Maoniuping rare earth deposit, Mianning County, Sichuan Province,has been analyzed for La, Ce, Pr and Nd by synchronous radiative X-ray fluorescence technics at the National BEPC Laboratory.

对采自四川省冕宁县牦牛坪稀土矿床中伟晶状霓辉石－重晶石－氟碳铈矿脉的一个氟碳铈矿晶体（约12×12mm）在BEPC国家实验室采用同步辐射X萤光技术分析了La、Ce、Pr和Nd。

Objective:to study the probable degradation of flutamide under the condition of light, heat, acid, alkalic and oxidation,and to evaluate the ability of the analytical method to separate degradation products.methods: hplc method of related compounds of flutamide in ep5.0 was used and flutamide and impurity contents were calculated by percentage area method.

目的：研究氟他胺在高温、光照、酸性、碱性和氧化条件下可能发生的降解。方法：根据欧洲药典5.0（ep5.0）中氟他胺有关化合物的hplc测定方法，以百分面积法计算主成分含量和杂质含量。

The basic procedure is to easily prepare the fluorinated alkoxide which acts as the versatile nucleophile from the corresponding alcohol.

能以简单的实验步骤将氟醇形成具有亲核基的氟醇钠基团，以用来合成一系列化合物，纯化容易产率高。

The labia have now been sutured together almost completely.The drains and the Foley catheter come out at the top.

此刻阴唇已经几乎完全的缝在一起了，排除多余淤血体液的管子和Foley导管从顶端冒出来。

To get the business done, I suggest we split the difference in price.

为了做成这笔生意，我建议我们在价格上大家各让一半。