氢

Use D4 or DMC,vinyl di-blocking agent,ringy vinyl,hexamethyl-disiloxane as raw materials,tetramethyl hydroxyl ammonium as catalyst,we synthesized a vinyl silicone oil.

以D4，乙烯基双封头，乙烯基环体，六甲基二硅氧烷等为原料，四甲基氢氧化铵为催化剂合成了摩尔质量和乙烯基含量不同的乙烯基硅油；以高含氢硅油，含氢双封头，D4合成实验所需的含氢硅油；以白碳黑为填料通过密炼等工序制备了医用高透明液体注射硅橡胶。

These results indicate that cabbage phenolic extract and single phenolic acids,i.e.Ferulic acid,Sinapinic acid and Gallic acid,etc.

研究表明，卷心菜提取物以及单个酚酸（儿茶素、阿魏酸和香豆酸）可以抑制〓、〓—7，8—二氢二醇和四氯化碳在肝微粒体作用下的代谢，降低主要代谢产物〓—7，8—二氢二醇、〓—7，8—二氢二醇—9，10一环氧化物和丙二醛的生成量。

Chiral 3 methy 1,4 butanediol and its derivatives are the important intermediate of synthesis of chiral smectic liquid crystal polyesters and chiral natrual products with biological activity. In the paper, a new efficient route of 3 methyl 1,4 butanediol and its two derivatives, 2 methyl 4 tetrapyranyloxy 1 butanol and 2 methyl 4 tetrapyranylbutanal, was described, and the target products were synthesized by employing asymmetric hydroboration oxidation improved.

手性2－甲基－1，4－丁二醇及其衍生物是合成各种手性近晶型液晶材料以及手性天然生物活性物质的重要中间体，以3－甲基－3－丁烯－1－醇为原料利用改进的不对称硼氢化－氧化反应，成功地合成了－2－甲基－1，4－丁二醇以及其2种手性衍生物：－2－甲基－4－四氢吡喃氧基－1－醇和－2－甲基－4－四氢吡喃氧基丁醛。

Diaminoalkanes react with sym - tetrachloroethane to give crystaline 2,2'- Bis -( hexahydropy-rimidine) derivatives 1 - 5, after treatment with aqua ammonia.

利用均四氯乙烷及二氯甲烷的胺化反应，合成了联氢化嘧啶衍生物1～5，4a，8b-反-4，5，8a，9a-四氮杂全氢芴(6)和8b，8c-顺-3a，4a，7a，8a-四氮杂环戊并全氢芴(7)。

1H-imidazolyl)-1H-imidazolium chloride-4-aminobenzoic acid, 2,2-bi-1H-imidazolium bis(3,4,5-trihydroxy benzoate) tetrahydrate and bis2-(2-1H-imidazolyl-1H-imidazolium 3-carboxy-4-hydroxybenzene-sulfonate monohydrate have been synthesized and characterized by X-ray diffraction methods.

在化合物中，晶体结构中的基本单元是一个通过氢键模式R_2~2(9)和R_2~1(7)构成的氢键三聚体PABA…H_3biim~+…Cl~-，这个三聚体基本单元又通过N-H…Cl氢键相互作用形成了一维带状结构。

Totally, seven dihydroabietic-type resin acids,five dihydropimaric\isopimaric-type resin acids and three tetrahydro resin acids were identified in the tracking analysis.

在整个跟踪分析过程中，共检出7种二氢枞酸型树脂酸、5种二氢海松酸\异海松酸型树脂酸及3种四氢树脂酸。

Using MA as raw material, Xuzhou Chemical and Medicine Industrial Corporation is to produce 20,000-tonne 1-4 butanediol and 4,000-tonne tetrahydro furan per year.

1.4丁二醇联产四氢呋喃工程1-4 Butanediol and Tetrahydro Furan Production 徐州市化学医药工业公司拟以顺酐为原料，采用顺酐法低压加氢工艺，建设年产2万吨1.4丁二醇，联产4000吨四氢呋喃生产线。

Tetrahydrofolatecoenzyme,Benzimidazoline,One-carbontransfer,Mannichalkali,Tetrahydroisoquinoline,Tetrahydro-β-carboline

四氢叶酸辅酶，苯并咪唑烷，一碳转移，Mannich碱，四氢异喹啉，四氢-β-咔啉

Their physic-chemical properties were determined by XRD, BET, H2-TPR and XPS, and their catalytic performance were evaluated through the hydrotreating reaction with thiophene or tetralin as feedstock.

采用XRD、BET、H2-TPR和XPS等表征方法对氮化物的理化性质进行研究；并以噻吩和四氢萘的环己烷溶液为原料，考察氮化物作为加氢催化剂的加氢精制性能。

Catalytic cracking ; gasoline stock ; hydrogen donor solvent ; hydrogen transfer ; tetralin

催化裂化；汽油料；供氢溶剂；氢转移；四氢化萘

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐