苯核

Two dinuclear metallocenes with biphenyl bridge were synthesized. and their catalytic properties for the polymerization of ethylene were investigated.

3对于具有超高活性的混合双茂化合物，我们用联苯桥连合成了其类似的双核茂金属化合物。

Parts of many members of the rose family, such as kernels of the apricot, peach, and bitter almond, which breaks down into hydroeyanic acid, benzaldehyde, and glucose.

苦杏仁素一种糖苷，c20h27no11，通常出现在植物种籽、蔷薇科植物的其它部分中，如杏、桃、苦杏仁的核中，可分解成水解酸、苯甲醛和葡萄糖

A glycoside,C20H27NO11,commonly found in seeds and other plant parts of many members of the rose family,such as kernels of the apricot,peach,and bitter almond ,which breaks down into hydroeyanic acid,benzaldehyde,and glucose.

苦杏仁素一种糖苷，C20H27NO11，通常出现在植物种籽、蔷薇科植物的其它部分中，如杏、桃、苦杏仁的核中，可分解成水解酸、苯甲醛和葡萄糖

Accumulation of BP in blood plasma played a major role in the formation of lymphocyte micronucleus.

血浆苯并芘的蓄积是导致微核形成的主要因素。

We investigate the reaction involving alkynes and α-halophenylethanone in presence of catalyzer to occur nucleophilic addition reaction.

我们还对炔烃与α-卤代苯乙酮在催化剂存在下发生亲核加成反应做了一系列的探索。

A novel carbonyl transposition led by anilines'nucleophilic addition to methyl 2-keto α-D-glucopyranoside was discovered. And the mechanism of the reaction concerned to an enol rearrangment was provided through tracing the change of 〓H-NMR and 〓C-NMR of a hemiacetal intermediate which was obtained in the reaction of o-phenylene diamine with 2-keto glycoside. Both the intermediate and the converting product were identified by 〓H-NMR,〓C-NMR,〓H-〓H COSY and HMQC.

一、发现了2-位氧化α-甲基D-葡萄糖苷的芳胺亲核加成引起羰基转位的新方法，利用核磁共振氢谱及碳谱对邻苯二胺与2-位氧化α-甲基D-葡萄糖苷加成生成的稳定中间体半缩酮化合物在氘代丙酮中的变化进行跟踪，结合对转化产物的氢氢相关谱和HMQC结构确证，提出了该反应中2-位羰基通过烯醇化互变而转至3-位的机理并得到了验证。

MethodsA total of 63 patients with AAA from benzolism who underwent treatment for the first time were investigated for marrow test including myeloproliferative degree, ratio of every hemocyte system, hemocyte division, megakaryocyte count, plasm vacuoles, and hematopoiesis exponent, which were compared with that of those with primary AAA at the same time.

63例初治苯中毒AAA住院病例，入院时行骨髓检查，分析骨髓增生程度、各系的比例、细胞分裂像、巨核细胞数、胞浆空泡及造血指数积分，并与同期收治的原发性AAA作比较。找寻其特点。

For instance,it was recently reported that lapp villagers in northern Sweden and Norway were forbidden to eat local reindeer meat after their herds became contaminated by fallout from the nuclear accident at Chernoby1 in far-off Ukraine.

例如，最近报道在瑞典和挪威北部的拉普村民由于核事故造成的辐射问题污染而禁止食用当地驯鹿肉和牛肉。与此同时的，加拿大科学家发现野生动物的多氯联苯和北极熊肝脏等污染物的含量高。

The present paper take the purine synonym kui zuo lin as a parent nucleus, separately in its 4 and 7 introduction structure diverse substituted benzene amino and the flexible side chain, designed a series of 4- substitution anilino-- 6- methoxy - 7-(2- hydroxyl to substitute for third oxygen radical) kui zuo lin a kind of compound.

本论文以嘌呤类似物喹唑啉为母核，分别在其4位和7位引入结构多样的取代苯氨基和柔性侧链，设计了一系列4-取代苯胺基-6-甲氧基-7-(2-羟基取代丙氧基)喹唑啉类化合物。

As the second part of a series of studies on the synthesis of 2-phenoxyisobutyric acid ethyl ester by tri-liquid-phase catalysis, this work examines the factors affecting the reaction between 2-bromoisobutyric acid ethyl ester and sodium phenolate with tetra-n-butylammonium bromide as a phasetransfer catalyst.

本文为以三液相催化技术合成2-苯气基异丁酸乙酯之研究系列的第二部份，主要在探讨各变因对以溴化正四丁基铵为相间转移触媒，催化2-溴异丁酸乙酯与酚化钠（NaOPh，水相亲核试剂）反应的影响。

We have no common name for a mime of Sophron or Xenarchus and a Socratic Conversation; and we should still be without one even if the imitation in the two instances were in trimeters or elegiacs or some other kind of verse--though it is the way with people to tack on 'poet' to the name of a metre, and talk of elegiac-poets and epic-poets, thinking that they call them poets not by reason of the imitative nature of their work, but indiscriminately by reason of the metre they write in.

索夫农 、森那库斯和苏格拉底式的对话采用的模仿没有一个公共的名称；三音步诗、挽歌体或其他类型的诗的模仿也没有——人们把&诗人&这一名词和格律名称结合到一起，称之为挽歌体诗人或者史诗诗人，他们被称为诗人，似乎只是因为遵守格律写作，而非他们作品的模仿本质。

The relationship between communicative competence and grammar teaching should be that of the ends and the means.

交际能力和语法的关系应该是目标与途径的关系。