苄基

Firstly, Polystyrene-supported benzyl selenide has been prepared from 1% cross-linked polystyrene resin.

一、以1%交联的聚苯乙烯为载体，首次合成了聚苯乙烯负载的苄基硒醚。

With L-DOPA as the starting chiral phenylalanine derivatives, construction of the skeleton of Phthalascidin was studied. Firstly, starting from L-DOPA and 3,4-dimethoxyphenylalanine, an amide 〓 was obtained, and a modeling cyclization reaction was carried out but failed to give the anticipated product.

二、对由苯丙氨酸甲酯衍生物通过Bischler-Napieralski反应合成四氢异喹啉—3—甲酯进行了研究，通过研究首次发现，生成苄基噁唑的反应是正常的B-N反应的竞争性反应，并从机理上给予了解释，所得出的结论具有一定的规律性，在杂环的合成方面具有一定的应用价值。

The transparency and rigidity of a polyolefin resin is improved by addition of dibenzylidene sorbitol.

在加入二亚苄基山梨醇后，聚烯烃树脂的透明度和刚性有了很大的提高。

One synthetic strategy started fromγ-butyrolactone 38, from which a cyclohexadiene intermediate 30 was prepared in an overall yield of 44% in a 7-step procedure after y-butyrolactone underwent a-bromination, dehydrobromination, Diels-Alder reaction, aminolysis, benzylation, bromination and dehydrobromination, with the key step being the Diels-Alder reaction under harsh condition.

其中一个路线从γ-丁内酯38开始，连续经过α-溴化、脱溴化氢、Diels-Alder反应、胺解、苄基化、溴化和脱溴化氢共7步反应，制备了一个环己二烯衍生物30，总产率44％，关键步骤是高温高压下Diels-Alder反应。

In the present study, influences of 6-BA (6-benzyl aminopurine) on cluster root formation, exudation of citrate and malate and their concentration in the root clusters of P-deficient white lupin plants were studied by using of non-destructive localized collection method and high-performance liquid chromatography analyze technique.

本文研究了6-BA（6-苄基腺嘌呤）处理对缺磷的白羽扇豆排根形成的影响，并利用非破坏性原位收集方法和高效液相色谱技术研究了6-BA处理对根簇分泌柠檬酸和苹果酸及组织中这两种有机酸含量的影响。

The excised leaf of Phalaenopsis RSW1 was used as explants, the effects of basic media, kinds and concentrations of 6-benzyl aminopurine (6-BA) and thidiazuron, dark culture phase, and leaf age on adventitious shoot regeneration from leaves of Phalaenopsis RSW1 were investigated.

以蝴蝶兰品系RSW1离体叶片为外植体，探讨了基本培养基、6-苄基腺嘌吟(6-BA)和噻重氮苯基脲、暗培养时间及叶片生育期对叶片不定芽发生的影响。

DFT were carried out to optimize the conformational isomers with minimum energies. Peak separations in the methyl and azomethine signals were also found to originate from the rotation hindrance of the N-N bond. After N'-acylideneacetohydrazides were converted to 1, 3, 4-oxadiazole compounds, the proton signal of the methyl group appeared as a single peak.

端甲基质子和次甲基质子信号裂分也来源于N-N键旋转受阻。N'-苄基酰腙通过缩合反应转变成1，3，4-二唑化合物，消除了甲基空间取向的差异，其信号变为单峰。

Substitutes on benzal benzene ring of BFP have different effects on .

BFP 苄基苯环上2-Cl、3-Cl、2-CH3、4-CH3、3-OCH3取代，可增强体外清除。

Substitutes on benzal benzene ring of BFP have different effects on ·OH scavenging activity in vitro. 2-Cl,3-Cl,2-CH3,4-CH3 and 3-OCH3 may enhance the activity. 3-CH3 may not change the activity.

BFP苄基苯环上2-Cl、3-Cl、2-CH3、4-CH3、3-OCH3取代，可增强体外清除·OH活性；3-CH3取代，体外清除·OH活性基本不变；2-OCH3、4-OCH3取代，体外清除·OH活性降低。

Substitutes on benzal benzene ring of BFP have different effects on ·OH scavenging activity in vitro. 2-Cl,3-Cl,2-CH3,4-CH3 and 3-OCH3 may enhance the activity. 3-CH3 may not change the activity. 2-OCH3 and 4-OCH3 may reduce the activity.

BFP苄基苯环上2-Cl、3-Cl、2-CH3、4-CH3、3-OCH3取代，可增强体外清除·OH活性；3-CH3取代，体外清除·OH活性基本不变；2-OCH3、4-OCH3取代，体外清除·OH活性降低。

Now, however, all children continue in "comprehensive" schools, and the eleven-plus determines which courses of study the child will follow.

然而现在，所有的孩子都要在综合学校继续学习，所以这次考试只是决定他们将要学习哪些课程。

Cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture .

城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。