氟苯

Three alicyclic dianhydrides, 1,2,3,4-cyclobutanetetracarboxylic dianhydride, 1,2,4,5-cyclopentanetetracarboxylic dianhydride, and 1,2, 4, 5-cydohexane tetracarboxylic dianhydride were polymerized with two aromatic diamines, 1,4-bis (4-amino-2-trifluoromethylphenoxy) benzene (6FAPB, a) and 4, 4'-bis(4-amino-2-trifluoromethyl phenoxy) biphenyl (6FBAB, b) respectively, via a two-step polycondensation procedure to afford two series of fluorinated semi-alicyclic polyimides.

分别将脂环族二酐单体1，2，3，4-环丁烷四酸二酐、1，2，4，5-环戊烷四酸二酐和1，2，4，5-环己烷四酸二酐与芳香族含氟二胺1，4-双（4-胺基-2-三氟甲基苯氧基）苯(6FAPB， a)和4，4'-双（4-胺基-2-三氟甲基苯氧基）联苯(6FBAB， b)反应制备两个系列的含氟半脂环族聚酰亚胺，研究了PI薄膜的热性能和光学性能。

Difluorodiphenylsulfone and 4, 4"-difluorodiphenylketone are sulfonated by 50 % sulfuric acid. A new biphenol monomer containing six-membered ring imide is synthesized by reaction of 1, 4, 5, 8-naphthelenetetracarboxylic acid dianhydride with 3-aminophenol or 4-aminophenol sodium.

以50%发烟硫酸为磺化试剂，以4，4′-二氟二苯砜和4，4′-二氟二苯酮为原料反应得到双磺化的4，4′-二氟-3，3′-二磺酸钠-1，1′-二苯砜和4，4′-二氟-3，3′-二磺酸钠-1，1′-二苯酮。

Comparing with the photodissociation of bromobenzene, the extra fluorine atom of fluorobenzene accelerates the rate of the internal conversion from the state to the state, and the different positions on the phenyl ring also have distinct effect on it.

与溴苯相比，氟溴苯上的氟原子显著加快了解离的速度，并且氟原子在苯环上的位置的不同对解离速度也有显著影响。

Tetrachloroterephthalic acid was prepared by chlorinating terephthalic acid, oleumsolvent and iodine catalyst. Tetrachloroterephthalic acid was acylated by sulphurous oxychloride in the presence of DMF to form tetrachloroterephthaloyl chloride. The acyl chloride product was fluorinated by potassium fluoride and esterified by methanol to synthesize dimethyl tetrafluoroterephthalate. The ester was reduced with potassium borohydride and lithium chloride to give tetrafluoroterephthalyl alcohol. The above product was bromated in the hydrobromic acid to obtain 4-bromomethyl-2,3,5,6-tetrafluoro-benzene methanol. 4-Methyl-2,3,5,-6-tetrafluorobenzene ethanol was obtained by reducing the bromide with magnesium. In the exist of DCC and DMAP, tefluthrin was got by the condensation reaction between 4-methyl-2,3,5,6-tetrafluoro-benzene methanol and-(1RS,3RS)- 3-(2- chloro-3,3,3-trifluoro-1-propenyl)-2,2-dimethyl cycolpropanecar-boxylate acid.

对苯二甲酸与氯气在碘存在下以发烟硫酸为溶剂进行氯化制备四氯对苯二甲酸；再以DMF为催化剂与二氯亚砜反应生成四氯对苯二甲酰氯；以氟化钾为氟化剂，环丁砜为溶剂置换氟化，再与甲醇酯化得到四氟对苯二甲酸甲酯；以KBH4-LiCl为还原剂二甲醚为溶剂反应制得四氟对苯二甲基苄醇；以氯苯为溶剂在溴化氢溶液中溴化得到溴化产物；在乙醇溶液中经镁粉还原得到4-甲基-2，3，5，6-四氟苄醇；甲基苄醇与功夫酸在催化剂二环己基碳二亚胺和4-二甲氨基吡啶作用下缩合得到七氟菊酯，总收率达43.6%。

Three standard and two isolated strains of E.coli were used for drug sensitivity test on Chloramphenicol, Ciprofloxacin Lactate, Rifampicin, sulfamonomethoxine, Florfenicol, Ceftiofur Sodium as well as the antimicrobial synergists sulbactam sodium and TMP. The bacteriostasis results of the antibiotics against E.coli In vitro were compared when they were used separately or combined with the synergist.

试验用3株大肠杆菌标准株和2株地方分离株，选择氯霉素、乳酸环丙沙星、利福平、磺胺-6-甲氧嘧啶钠、氟苯尼考、头孢噻呋和抗菌增效剂舒巴坦钠、TMP进行药敏试验，比较几种药物单一或与增效剂合用对大肠杆菌的体外抑菌效果。

Antibacterial activity, time-killing kinetic curve of florfenicol and it′s combinations with doxycycline in vitro were studied.

对氟苯尼考及其与多西环素联合的体外抗菌活性、杀菌动力学曲线和抗菌后效应作了研究。

Methods The present study has been carried out using NaCMC injected into the mice's abdominal cavity to cause inflammation and induce white blood cell migration,varnishing DNFB to induce mice's DTH,injecting colloid activated carbon suspension into mice's tail vein,with 10% of sheep RBC injected into the abdomen to immunize mice.

方法采用大鼠腹腔注射羟甲基纤维素钠致炎诱发白细胞游走，涂抹二硝基氟苯诱导小鼠迟发型超敏反应，小鼠尾静脉目的观察小儿利咽康颗粒剂的免疫调节作用。

METHODS Dinitrofluorobenzene was used to induce the contact dermatitis in mouse ear, rhIL-11 0.375-1.5 mgkg^(-1)d^(-1) sc for 10 d, the degree of skin inflammatory reaction was observed. At the same time, the serum level of tumor necrosis factor-α and interleukin-6(IL-6) was measured by radioimmunoassay; the serum level of nitrogen monoxidum was detected by biochemical method and the expression of intercellular adhesion molecule-1(ICAM-1) was detected by immunohistochemical method.

采用2，4-二硝基氟苯致小鼠耳部皮肤接触性皮炎试验模型，观察sc rhIL-11 0.375~1.5mgkg^(-1)d^(-1)，连续10d后皮肤炎症反应程度，同时采用放射免疫分析法测定血清中肿瘤坏死因子-α和白细胞介素-6(IL-6)的水平，采用生物化学检测法测定血清一氧化氮的水平，采用免疫组化法测定皮肤中细胞间粘附分子(ICAM-1)的表达。

High yields of indazoles (70-85%) were obtained in the condensations of aldehydes with various substitution patterns with the exception of those possessing electron-donating groups in the 5-position and the unsubtituted o -fluorobenzaldehyde.

高产量吲唑(1970年至1985年%)获得了各种替代方式醛缩合的例外拥有电子基团的5位和unsubtituted 邻氟苯甲醛。

The MICs of isoniazid, L-canavanine, L-azetidine-2-carboxylic acid and mercaptopurine for D. salina in liquid medium were over 200mg·L-1, while the MIC of ρ-Fluorophenylalanine was only 180mg·L-1.D.

液体培养中刀豆氨酸、异烟肼、玲蓝氨酸和6-巯基嘌呤对盐藻的最低抑制浓度均超过200mg·L-1，而ρ-氟苯丙氨酸最低抑制浓度则为180mg·L-1。

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。