二苯胺

Xinquan HuTwo new chiral backbones R-- and S--2-amino-2"-hydroxy-4,4",6,6"-tetra methyl-1,1"-biphenyl were synthesized via nitration, diazotation/iodination, Ulhnann coupling, selective reduction, diazotation/hydrolysis, hydrogenation and resolution from 2,4-dimethyl-aniline in seven steps.

以2，4-二甲基苯胺为起始原料，经过硝化反应、重氮化碘代反应、Ullmann缩合反应、选择性双硝基单还原反应、重氮化水解反应、催化氢化反应和拆分，首次合成了--2-氨基-2'-羟基-4，4'，6，6'-四甲基-1，1'-联苯和--2-氨基-2'-羟基-4，4'，6，6'-四甲基-1，1'-联苯两个对映体。

After coupling diazotized p-chloroaniline with imidazole, the resulting monoazo dye is quaternized with dimethyl sulfate. Upon dimethylamination, the ...

对-氯苯胺重氮化后，与咪唑偶合，生成单偶氮染料，与硫酸二甲酯季铵化，所得季铵化合物再经二甲胺基化即为题示染料。

Bromine and its mainly engaged in the production of downstream products and research and development, bromine annual output of 4,000 tons of products, quality standards in line with GB 2021-94, 2,6 dibromo 4 nitroaniline, more than 1,000 tons of annual production, quality to meet Customers as a standard, best-selling products at home and abroad.

主要从事溴素及其下游产品的生产和研发工作，溴素产品年产量4000余吨，质量符合GB 2021-94标准，2，6二溴4硝基苯胺，年产量1000余吨，质量以满足客户为标准，产品畅销国内外。

Study on Extender N,N-Di(2-hydroxypropyl) phenylamine

扩链剂N，N-二(2-羟丙基)苯胺的研究

Methods This study contained a total of 16 culture groups, including one group as control and 5 groups treated by 5 drugs (calcium L-threonate, sodium L-threonate, alendronate, 17β-estradiol and calcium gluconate) each at the final concentrations of 10^(-9)mol/L, 10^(-7)mol/L, 10^(-5)mo1/L respectively. After 7 days, eight bone slices of every group were stained with toluidine blue and the areas of resorptive pits were analyzed under light microscope; the concentrations of C-telopeptide of type Ⅰ collagen CT(subscript x or Crosslaps in culture supernatants were measured by ELISA.

制备骨磨片，培养OC，并分别加入高中低浓度10^(-5、10^(-7)、10^(-9)mol/L的L-苏糖酸钙、L-苏糖酸钠、阿仑麟酸钠、17β-雌二醇、葡萄糖酸钙，实验设以上各浓度组及对照组（共16组，每组n=8），甲苯胺蓝染色一光镜观察分析骨片上骨吸收陷窝面积，ELISA测定上清液Ⅰ型胶原C-末端肽（CTx或Crosslaps）浓度。

Novel styryl derivatives with triphenylamine as donor and triazine as acceptor were synthesized. The two-photon absorption cross section for Ⅴ-1,Ⅴ-2 and Ⅴ-3 were determined to be 0.31×10〓cm〓/Gw, 0.365×10〓cm〓/Gw and 1. 64×10〓cm〓/Gw by femtosecond Z-san technology, respectively.

合成了以三苯胺为电子给体、三嗪为电子受体的新型二苯乙烯类化合物，用飞秒开口z-扫描测量化合物Ⅴ-1、Ⅴ-2和Ⅴ-3的双光子吸收截面分别为0.31×10〓cm〓/Gw、0.365×10〓cm〓/Gw和1.64×10〓cm〓/Gw。

Key words摘要: diazotizationcoupling reaction;resonance scattering spectra;nitrite;sulfanilic amide;N,Ndimethyl aniline

重氮化偶联反应；共振散射光谱；亚硝酸根；磺胺；N，N二甲基苯胺

Infrared spectrum, X-ray diffraction, transmission electron microscopy and conductivity measurement were employed to investigate the properties and structure of polyaniline samples, which were synthesized by emulsion polymerization with different concentrations of ammonium peroxydisulfate and dodecyl-benzene sulphonic acid.

采用红外光谱、X射线衍射、透射电子显微术结合电导率测量，研究了以过硫酸钱为氧化剂，十二烷基苯磺酸为掺杂剂，通过乳液聚合法合成的聚苯胺的性能与结构。

It was found that the titled amine in which although dimethyl aniline and triethyl amine both were contained, possesses less efficiency of photoinitiation while it was composed with ketone as an initiated system.

发现该特殊的胺类化合物虽包括二甲基苯胺和三乙胺两个部分，但它和酮类相组合形成的光引发体系只有较低的尤引发速率。

Next, another novel diamine, 5-5-(4-phenyl-1,3,4-oxadiazol-2-ylbenzene-1,3-diamine, was prepared and polymerization was carried out in the same way to obtain polyimides containig triphenylamine units and 1,3,4-oxadiazole moieties in the side chain .

接下来，合成另一个新型双胺5-5-(4-phenyl-1，3，4-oxadiazol-2-ylbenzene-1，3-diamine后，以相同方法进聚缩合反应，可制得另一系列三苯胺和1，3，4-恶二唑为侧链的聚醯亚胺。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。