查询词典 chemical compound

These chemical compounds were found for the first time from this alga and compound 9 had never been reported in previous literatures.

这些化合物均是首次在该种海藻中得到的，经CA检索化合物9未见文献报道。

White phosphorus is a common allotrope of the chemical element phosphorus which has found extensive military application as an incendiary agent, smoke-screening agent, and as an antipersonnel flame compound capable of causing serious burns.

白磷属于磷元素的一种同素异形体，这种化学物质被广泛应用于军事燃烧弹，烟幕弹的制作中，其杀伤性燃烧混合物可以造成严重的烧伤。

Its main products are high efficiency compound fertilizer ammonium phosphate, sulphate chemical products, cement and bromine-, but the use of raw materials are generally from the fertilizer factory waste and ordinary sea water.

它的主要产品是高效复合肥磷铵，化工制品硫酸、溴素以及水泥等，但使用的原料却是一般化肥厂排出的废料和普通的海水。

The results show that the excitation energy of carbon in compound with complex structure and greater chemical bond energy requires relatively more energy.

实验结果表明：存在于结构复杂、化学键能较大的物质中的碳元素，被激发所需的激光能量也较大。

Company main products, there are in addition to domestic famous "Snow grams" brand series: PVC coating, PU Laminated, 300T more than nylon, polyester cloth and High Fiber down outside the compound fabric; there are all kinds of cotton, chemical fiber and blended for raw materials casual, shirts, tencel, and elastic products; a series of "N / C, C / N, T / C, COTTON" plastic scraper, such as multi-functional, senior washed and composite fabrics, imitation buckskin fabric and long-term and The United States cooperation in the production of DuPont's "Teflon" and other multi-functional family of fabrics.

公司主要产品，有除享誉国内的"雪克"牌系列：PVC涂层、PU贴合、300T以上尼龙、涤纶羽绒布及高级化纤复合布外；还有各种纯棉、化纤以及混纺为原材料的休闲、衬衣、天丝、及弹力产品；有一系列的"N/C、C/N、T/C、COTTON"等多功能刮胶、高级水洗及复合面料、仿鹿皮面料，并长期与美国杜邦公司合作生产的"特氟隆"等多功能系列面料。

Wherein, the chemical formula of said compound is γ-HaKbNac(H2O)dNixM1-XO2 and the method comprises that mixing the nickel salt solution and at least one metal salt solution to attain the solution A; preparing caustic soda or caustic potash solution and adding sodium carbonate or potassium carbonate to attain the solution B; preparing the ammonia solution C; reacting the A, B, and C, processing the solid-liquid separation to attain the ball α nickel hydroxide; reacting with the oxidant in the solution of caustic soda or caustic potash to attain the black solid-liquid mixture and processing the solid-liquid separation to attain the ball γ hydroxyl nickel oxide.

其化学表达式为γ-HaKbNac(H2O)dNixM1-XO2，将镍盐溶液与至少一种金属盐溶液混合得溶液A，配制氢氧化钠或氢氧化钾溶液，加入碳酸钠或碳酸钾得溶液B；配制氨水溶液C；将A、B、C反应，固液分离，得球形α氢氧化镍；在氢氧化钠或氢氧化钾溶液中与氧化剂反应，得黑色固液混合物，再固液分离，得球形γ羟基氧化镍。

To further study the chemical constitutes of lipophilic active parts, we prepared Alc95% and Alc50% according to original literature. 20 compounds were isolated by using macroporous resin, silica gel, polyamide, Sephadex LH-20, Rp-18, preparative TLC and preparative HPLC chromato-graphy. The structures of them were elucidated by means of physical and chemical properties, modern spectroscopic analysis techniques—UV、IR、 EI/MS、ESI/MS、〓H-NMR、〓C-NMR、DEPT、HMQC、HMBC. They are nine anthraquinones: chrysophanol (95-1), physcion (95-2), emodin (95-5), aloemodin (95-7), rhein (50-1), sennoside A or B (50-6),ω-hydroxylemodin (95-10), chrysophanol-8-0-β-D-glucoside (95-12), aloemodin-ω-0-β-D-glucoside (95-13); three phenanthaquinones: tanshinone ⅡA (95-3), cryptotanshinone (95-6), tanshinone Ⅰ(95-4); one isoflavone: 7, 3'-dihydroxyl-5' methoxyisoflavone (95-14) and protocaechuic aldehyde (95-9), protocaechuic acid (95-11), astragaloside Ⅳ(50-4), amygdalin (50-5), 2, 3, 5, 4'-tetrahydroxylstilbene-2-0-β-D-glucoside (50-3),-catechin (50-2), cinnamic acid (95-8). Among them, 3'-dihydroxyl-5' methoxyisoflavone (95-14) is a new compound.

经过溶剂萃取、大孔吸附树脂富集、Sephadex LH-20精制、制备TLC及Semi-pre HPLC等手段从中分离了20个化合物，利用理化性质和波谱技术(UV、IR、EI／MS、ESI／MS、〓H-NMR、〓C-NMR、DEPT、HMQC、HMBC)相结合鉴定了它们的结构，分别为9种蒽醌类化合物：大黄酚，大黄素甲醚，大黄素，芦荟大黄素，大黄酸，番泻苷A或B，ω-羟基大黄素(ω-hydroxylemodin)，大黄酚-8-0-β-D-葡萄糖苷(chrysophanol-8-0-β-D-glucoside)，芦荟大黄素-ω-0-β-D-葡萄糖苷(aloemodin-ω-0-β-D-glucoside)；3种菲醌类化合物：丹参酮ⅡA(tanshinoneⅡA)，隐丹参酮，丹参酮Ⅰ(tanshinone Ⅰ)；1种异黄酮：7，3'-二羟基-5'-甲氧基异黄酮（7，3'-dihydroxy-5' methoxyisofla-vone）以及原儿茶醛，原儿茶酸，黄芪甲苷(astragaloside Ⅳ)，苦杏仁苷，2，3，5，4'-四羟基二苯乙烯-2-0-β-D-葡萄糖苷（2，3，5，4'-tetrahydroxylstilbene-2-O-β-D-g1ucoside），Z—儿茶素，桂皮酸。

The chemical bond properties of the magnetoplumbite type compound LaMAl11O19 have been studied by using the average band-gap model of the complex crystal chemical bond.

利用复杂晶体化学键的平均能带模型研究了LaMAl11O19晶体的化学键性质。

Currently the medicine for the treatment of hypertension is commonly chemical drugs, mainly including the following categories: diuretics,β—beta-blockers, vasodilatin, chemical antihypertensive tablets, compound antihypertensive tablets, etc.

目前治疗高血压常用的是化学药，主要有以下几类：利尿剂、β—受体阻滞剂、血管扩张素、化学降压片和复方降压片等。

The chemical kinetic modeling of NO reduction by a typical tar model compound is studied, in order to discover the mechanism of NO reduction by tar. Base on the mechanism of NO reduction by hydrocarbon and non-hydrocarbon intermediates produced in the tar oxidative decomposition, the chemical kinetic modeling of NO reduction by toluene is studied.

分析结果表明，苯、甲苯、苯乙烯和苯酚均有明显的累积离子流峰面积，是生物质焦油的主要组分，涵盖了初级、二级和三级焦油产物，所以选取苯、甲苯、苯乙烯和苯酚作为典型的生物质焦油的模型化合物。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。