氟化

The overall yield was 43.6%.The yield of reduce of ester was increased nearly one times than the past method because of KBH4-LiCl as the reducing agent instead of NaBH4. Changing the reaction conditions of bromization, the one-way yield enhanced 30%. The yield of reduce of the bromide was added by one times by improving the process. Tefluthrin was achieved by the catalytic esterification of DCC and DMAP.

优化后工艺对四氟对苯二甲酯的还原采用了廉价高效的还原试剂KBH4-LiCl，使收率比NaBH4法提高了近一倍；对溴化反应条件进行了优化，单程收率提高了30%；对溴化物还原条件的优化，使其收率提高了近一倍；采用了催化剂DCC和DMAP合成了最终产品七氟菊酯。

Study on an efficient process for the preparation of trifloxystrobin starting from 2-methylacetophenone bypartial oxidation,esterification,reaction with methoxyamine,bromization and condensation with 3'- acetophenone oxime.

以邻甲基苯乙酮为原料，经过高锰酸钾的碱性氧化，甲醇酯化，再与甲氧基胺盐酸盐肟化后，用N-溴丁二酰亚胺溴化，最后和间三氟甲基苯乙酮肟缩合得到目标产物肟菌酯。

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。

It occurred with poor regioselectivity leading to a mixture of 3-chloro-2,6-difluoro-4-iodopyridine (14; 77%) and 3-chloro-2,6-difluoro-5-iodopyridine (15; 15%) after iodination.

It利达介导的去质子不佳导致混合区域选择性发生在3 -氯-2，6 -二氟- 4 - iodopyridine（14，77％）和3氯- 2 ，6 -二氟- 5 - iodopyridine（15； 15％）后，碘化。

Water, C12-20 acid PEG-8 ester, hydrogenated polysobutene, petrolatum, dicaprylyl maleate, hydrogenated vegetable oil, propylene glycol, acetylated lancolin, glycoprrotiens,panax ginseng root extract,equisetum arvense extract, carbomer, butyrospermum parkill fruit, potassium cetyl phosphate, triethanolamine, hypericum perforatum extract, malva sylvestris extract, methylparaben, glycerin, urea, saccharide hydrolysate, magnesium aspartate, glycine, alanine, creatine, propylparaben, ethlparaben, imidazolidinyl urea, polyperfluoromethylisopropyl ether, fragrance

水，C12-20 酸 PEG-8酯，氢化聚异丁烯，凡士林，马来酸二辛酯，氢化植物油，丙二醇，乙醯化羊毛脂，糖蛋白，人参根萃取，问荆萃取，卡波姆，乳木果，鲸蜡醇磷酸酯钾，三乙醇胺，金丝桃萃取，锦葵萃取，羟苯甲酯，甘油，尿素，水解糖，天门冬酸镁，甘氨酸，丙氨酸，肌酸，羟苯丙酯，羟苯乙酯，尿素醛，聚全氟甲基异丙基醚，香料

The anticaries and remineralization potentiality of the slow-release fluoride tablet can control the enamel area of 96 mm2. The tablet can meet the clinical demands.

该缓释氟粘贴片体外抗龋和再矿化潜力很大，即在本实验条件下，连续给30片氟粘贴片，最大限度能控制96 mm2大小的釉面，预计能够满足临床的需要。

This Ph.D. thesis describes further studies on theformation of fluorinated phosphorus ylide-anions resultingfrom organometallics and their reactions, stereochemistry andapplications in organic synthesis. We found that inverse stereochemical results wereobserved in the reaction of the fluorinated ylide-anions withvarious proton donors.

本博士论文进一步研究了用有机金属试剂对含氟膦叶立德的亲核加成导致的叶立德阴离子的反应性、立体选择性及其在有机合成中的应用：首次发现含氟叶立德阴离子在与不同的质子化试剂作用时，反应呈现完全相反的立体化学结果。

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）。

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本公司主要经营IHF型化工衬氟泵，IH型化工离心泵，IS、ISZW、ISW系列单级单吸离心泵，FJX系列强制循环泵，WB系列不锈钢旋涡泵，LJYA 型磷胺料浆泵，FY型液下泵，GNF型螺杆泵，IHG、ISG、SG系列管道泵，CQ型磁力泵，AY型油泵，CPN无堵塞碱泵，YL系列压滤机专用泵，ZW、ZWF系列无堵塞自吸泵，DF系列淀粉专用泵，FSB氟塑料泵、FBR型耐温耐压印染泵，AFB系列耐腐蚀泵，LH磷化液专用泵，CZ系列标准化工泵，ZH系列自吸式化工离心泵，UHB-ZK系列耐腐耐磨砂浆泵等产品，材质有：1Cr18Ni9Ti、 1Cr18Ni12Mo2Ti、304、904、316、316L、CD4MCu、K合金、F46、PP、PE等，广泛应用于石油、化工、电力、印染、环保、冶金、食品等行业。

This is transformed into anomeric acetates 16, which is used for the synthesis of a number of 2＇, 3＇-dideoxy-2＇-trifluoromethylnuclosides via Vorbruggen glycosylation reaction. At the same time, L-2-tifluoromethyl-4-thiofuranosides 39 were also prepared from the key intermediate lactone.

从这一砌块出发，经由关键中间体2-三氟甲基-γ-丁内酯转化得到的化合物16的Vorbruggen糖苷化反应，合成了2＇，3＇-双脱氧-2＇-三氟甲基嘧啶核苷。

Lugalbanda was a god and shepherd king of Uruk where he was worshipped for over a thousand years.

Lugalbanda 是神和被崇拜了一千年多 Uruk古埃及喜克索王朝国王。

I am coming just now,' and went on perfuming himself with Hunut, then he came and sat.

我来只是现在，'歼灭战perfuming自己与胡努特，那麼，他来到和SAT 。