甲

A novel method for determination of benzoyl peroxide with spectrophotometry was developed. Inclusion ratio of β cyclodextrin to dibenzoy peroxide and benzoic acid is obtained with spectrophotometry.The mechanism of the inclusion was studied,too. The results showed that β-CD react with dibenzoyl peroxide to form a 1:1 or 2:1 host-guest complex, with the apparent formation constants of 5.0× 10~2and 2.5× 10~4 , respectively.β-CD reacts with benzoic acid to form a 1:1 host-guest complex with the apparent formation constant of 6.9 × 10~2 after the dibenzoyl peroxide was reduced by hydroxyl ammonium chloride.

建立了用β环糊精测定过氧化苯甲酰的分光光度法，并测定了β环糊精与过氧化苯甲酰和苯甲酸的包结比，随着β-CD浓度的增大，可与BPO分别形成1：1或2：1的包容络合物，包结常数分别为5.0×10~2和2.5×10~4，与苯甲酸形成1：1的包容络合物，包结常数为6.9×10~2；由于包结物的吸光度值比过氧化苯甲酰的吸光度值大大增加，建立了一种当β-CD存在下，在水溶液中测定过氧化苯甲酰的方法。

Many species of red tide plankton and cysts of dinoflagellate provide the species sources for the frequent occurrence of red tide, and the suitable hydrometeorological conditions, specific living habits of some dinoflagllates and high N/P ratio may be the main causes for the occurrence of dinoflagellate red tide in the sea area, and the eutrophication has less relation to the frequent occurrence of red tide in the sea area in spring.

多种甲藻赤潮生物以及甲藻孢囊的存在为赤潮的频繁发生提供了种源，适宜的水文气象条件、某些甲藻独特的生活习性以及高N/P比有可能是导致该海域甲藻赤潮爆发的主要原因，富营养化与该海域春季赤潮频繁发生的关系较小。

The company mainly produces: ammonia, dimethylformamide, formamide, N-dimethylformamide, mixed methylamine, isopropylamine.

公司主要生产：合成氨，二甲基甲酰胺，甲酰胺，N-甲基甲酰胺，混甲胺，异丙胺。

Results: For the changes of fingernails,it was found that 80 patients(13.33%) had leukonychia punctata,2 leukonychia striata,1 total finger nails dystrophy,4 pitted nails,40(6.67%) variable numbers and degrees of longitudinal crest,transverse grooves or onycholysis.

结果：600例白癜风患者中，80例(13.33%)出现点状白甲，2例出现线状白甲，1例出现双手全指甲营养不良，4例指甲出现点状凹陷，40例(6.67%)出现程度和数量不等的甲横沟、纵嵴或甲分离

Aldol condensation 2, 5-dimethoxymethoxyacetophone with 2, 4, 6 -tri methoxymethoxybenzendehyde, then hydrogenation, reductive, the key intermediate 83 (84) of natural product 3, 5, 7, 2′, 5′- pentahydroxyflavan, was obtained; Mini reviewed EGCg activity, Then gallic acid and phloroglucin were used to synthsis EGCg, The key intermediate Chalcone 109 of EGCg was abtained through 7 steps from gallic acid.

重点介绍了以没食子酸为原料，经酯化，保护，还原，氧化，格氏反应，氧化六步反应得到3，4，5-三苄氧基苯乙酮，以间苯三酚为原料，经维斯迈尔反应，苄基保护，甲氧甲氧基保护三步反应得到2，4-二苄氧基-6甲氧甲氧基苯甲醛，酮106与醛108经羟醛缩合得到EGCg重要反应中间体查尔酮109。

The total synthese three natural compounds to explore enantioselective synthesis of flavanol: We use phloroglucin and 2, 4, 6-trihydroxyacetophone as starting materials to synthesis distenin in two ways; Resorcin was used to synthsis 2, 5-dimethoxymethoxyacetophone though 3 steps.

对黄烷醇化合物的立体选择性全合成进行了探索：以间苯三酚和2，4，6-三羟基苯乙酮为原料，尝试用两条路线对Distenin化合物进行了全合成研究；以对苯二酚为原料，经三步制得2，5-二甲氧甲氧基苯乙酮，与2，4，6-三甲氧甲氧基苯甲醛反应，经四步反应得到天然产物3，5，7，2′，5′-二五羟基黄烷关键中间体1-（2′，6′-二甲氧甲氧基苯）-3-（2&，4&，6-三甲氧甲氧基苯）丙烷-1R，2R-二醇83及其对映体84；简要介绍了EGCg类化合物的生物活性和研究概况。

METHODS Chlorodehydromethyltestosterone was synthesized from methyltestosterone by cycloxidization with hydrogen peroxide to obtain cycloproxene methyltestosterone, which subjected to chloridization with was hydrochloric acid in the presence of propanone to obtain chloromethyltestosterone, and then was subjected to dehydrogenation with DDQ using PTS as dehydrogenation catalyst in benzene.

以甲睾酮和H2O2环氧化反应得到环氧甲睾酮，再与盐酸在丙酮溶媒中进行氯化反应，得到氯甲睾酮，最后用2，3-二氯－5，6-二氰基对苯醌在PTS催化下脱氢得到脱氢氯甲睾酮。

In the first part, five new 4-acyl pyrazolone 4-ethyl-thiosemicarbazones compounds: 1-Phenyl-3-methyl-4-(4-bromo)benzal-pyrazol-5-one N(4)-ethyl-thiosemicarbazone (PM4Br BP-ETSC), 1-Phenyl-3-methyl-4-(4-methyl)benzal-pyrazol-5-one N(4)-ethyl-thiosemicarbaz -one (PM4MBP-ETSC), 1-Phenyl-3-methyl-4-benzal-pyrazol-5-one N(4)-ethyl-thiosemicarba -zone, 1,3-diphenyl-4-benzal-pyrazol-5-one N(4)-ethyl-thiosemicarbazone and 1-Phenyl-3-methyl-4-phenylacetyl-pyrazol-5-one N(4)-ethyl-thiosemi -carbazone have been synthesized and characterized by elemental analyses, IR, 1H NMR spectra and single-crystal XRD.

第一部分合成了五个4-酰基吡唑啉酮缩4-乙基-氨基硫脲化合物：1-苯基-3-甲基-4-（4-溴）苯甲酰基-5-吡唑啉酮缩4-乙基-氨基硫脲(PM4BrBP-ETSC)，1-苯基-3-甲基-4-(4-甲基)苯甲酰基-5-吡唑啉酮缩4-乙基-氨基硫脲(PM4MBP-ETSC)，1-苯基-3-甲基-4-苯甲酰基-5-吡唑啉酮缩4-乙基-氨基硫脲，1，3-二苯基-4-苯甲酰基-5-吡唑啉酮缩4-乙基-氨基硫脲和1-苯基-3-甲基-4-苯乙酰基-5-吡唑啉酮缩4-乙基-氨基硫脲，其中前四个具有光致变色性质。

Results In cases without complication , the NFC could not be observed within 3 days after operation ; While all the cases with veinous crisis , the NFC appeared within 12 hours. But the NFC did not appear in all cases with artery crisis.

结果断指再植术后顺利的病例，术后3 d 以后才能观察到2～5 条甲襞毛细血管襻出现，7 d 后甲襞毛细血管襻数量和襻内血流状况恢复到正常水平；术后出现静脉危象的病例，均于术后12 h 内观察到较多粗大、无有形物流动的甲襞毛细血管襻；动脉危象则始终不能观察到甲襞毛细血管襻。

Objective To study a method for treating the ingrowing nail by using a nail fold skin flap to reˉconstruct the nail groove.

目的 研究一种利用甲侧襞皮瓣改变甲体与甲沟的位置结构，从而彻底治愈嵌甲的手术方法。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。