| 单词 | 催化剂 |
| 释义 | 〔cesium〕A soft, silvery-white ductile metal, liquid at room temperature, the most electropositive and alkaline of the elements, used in photoelectric cells and to catalyze hydrogenation of some organic compounds. Atomic number 55; atomic weight 132.905; melting point 28.5°C; boiling point 690°C; specific gravity 1.87; valence 1. See table at element 铯：一种质地柔软的银白色韧性金属，室温时为液体，为最具正电性与碱性的元素，用作光电池和某些有机化合物氢化作用的催化剂。原子序数55；原子量132.905；熔点28.5°C；沸点°C；比重1.87；化合价1 参见 element〔catalyze〕To modify, especially to increase, the rate of (a chemical reaction) by catalysis.催化：通过催化剂来改变尤指加快（一个化学反应）的速度〔catalysis〕The action of a catalyst, especially an increase in the rate of a chemical reaction.催化作用：催化剂的作用，尤指加快化学反应速度的〔catalyst〕a serious breach of trust that was the catalyst for the divorce;成为离婚催化剂的一次严重的背信行为；〔cytochrome〕Any of a class of iron-containing proteins important in cell respiration as catalysts of oxidation-reduction reactions.胞色细胞：任何一类含铁的蛋白质，在细胞呼吸中作氧化反应重要的催化剂〔peroxisome〕A cell organelle containing enzymes, such as catalase and oxidase, that catalyze the production and breakdown of hydrogen peroxide.过氧物酶体：一种包含酶的细胞器官，如催化剂和氧化剂，能够催化过氧化氢的生成和分解〔hydroforming〕A process in which naphthas are converted to high-octane aromatics in the presence of hydrogen and a catalyst under pressure and heat.临氢重整：在高温高压下，在氢和催化剂的作用下石油精转化为高辛烷值的芳烃的过程〔enzyme〕Any of numerous proteins or conjugated proteins produced by living organisms and functioning as biochemical catalysts.酶：由活的有机体产生的各种蛋白质或蛋白质结合体的一种，起生物催化剂的作用〔Pyrex〕"The water is mixed with titanium dioxide, which serves as a catalyst, and is pumped through Pyrex tubes"(Scientific American)"The physicist sets the ice sample in an empty Pyrex beaker"(Smithsonian)“通过派热克斯玻璃管把作为催化剂的二氧化钛之水的混合物抽进去”(科学美国人)“物理学家把冰标本放入空派热克斯烧杯”(史密森)〔zeolite〕Any one of a family of hydrous aluminum silicate minerals, whose molecules enclose cations of sodium, potassium, calcium, strontium, or barium, or a corresponding synthetic compound, used chiefly as molecular filters and ion-exchange agents.沸石：水合的铝硅酸盐矿物的一种，它的分子包括钠、钾、钙、锶、钡的阳离子或相同的人工化合物，主要用于分子过滤和离子交换的催化剂〔hydrocracking〕A process by which the hydrocarbon molecules of petroleum are broken into simpler molecules, as of gasoline or kerosene, by the addition of hydrogen under high pressure and in the presence of a catalyst.氢化裂解：将石油的含氢分子分裂成更简单的分子（象汽油和煤油的分子）的过程，此分裂过程是在加催化剂及高压氢气的条件上进行的〔palladium〕A soft, ductile, steel-white, tarnish-resistant, metallic element occurring naturally with platinum, especially in gold, nickel, and copper ores. Because it can absorb large amounts of hydrogen, it is used as a purification filter for hydrogen and a catalyst in hydrogenation. It is alloyed for use in electric contacts, jewelry, nonmagnetic watch parts, and surgical instruments. Atomic number 46; atomic weight 106.4; melting point 1,552°C; boiling point 3,140°C; specific gravity 12.02 (20°C); valence 2, 3, 4. See table at element 钯：一种柔软的，易拉长的，银白色的，保持光泽的金属性元素，常与铂共生，尤其在金、镍和铜矿中存在。因为它能吸收大量氢，常用作除氢的过滤器或氢化作用的催化剂。其合金可用于电子接触器、珠宝、无磁性表部件以及外科医用器具。原子序数46；原子量106.4；熔点1,552°C；沸点3,140°C；比重12.02（在20°C时）；化合价2，3，4 参见 element〔anticatalyst〕A substance that reduces or destroys the effectiveness of a catalyst.催化剂减缓物质：减轻或消除一种催化剂作用的物质〔germanium〕A brittle, crystalline, gray-white metalloid element, widely used as a semiconductor, as an alloying agent and catalyst, and in certain optical glasses. Atomic number 32; atomic weight 72.59; melting point 937.4°C; boiling point 2,830°C; specific gravity 5.323 (at 25°C); valence 2, 4. See table at element 锗：一种银白色的脆而透明的金属元素，被广泛用作半导体，可作一种合成剂和催化剂，还被用在光学玻璃中。原子序数32；原子量72.59；熔点937.4°C；沸点2,830°C；比重5.323（在25°C时）；化合价2，4 参见 element〔cyclase〕An enzyme that acts as a catalyst in the cyclization of a compound.环化酶：在化合物的环化作用中，作为催化剂的一种酶〔accelerant〕A substance, such as a petroleum distillate, that is used as a catalyst, as in the spreading of an intentionally set fire.催化剂，促媒：一种可用作催化剂的东西，如石油蒸馏剂，可使纵火得以蔓延〔flavoprotein〕Any of a group of enzymes containing flavin bound to protein and acting as dehydrogenation catalysts in biological reactions.黄素蛋白：由黄素与蛋白质相结合的任一类脱氢酶，在生化反应中作为脱氢反应的催化剂〔catalytic〕"Deregulation's catalytic power . . . is still reshaping the banking, communications, and transportation industries"(Ellyn E. Spragins)“解除管制的催化剂式的力量依然在重塑银行业、通讯业和交通运输业”(埃琳E.斯普莱金斯)〔kicker〕A condition that imposes an automatic increase, as in a pension plan.催化剂、刺激物：引起自动增长的条件，如抚恤金计划中〔biocatalyst〕A substance, especially an enzyme, that initiates or modifies the rate of a chemical reaction in a living body; a biochemical catalyst.生物催化剂：能在活的体内产生化学反应或改变生物体内化学反应速度的物质，尤指酶；生物化学催化剂〔catalytic〕Of, involving, or acting as a catalyst:催化剂的：催化剂的、有关催化剂的或起催化剂作用的：〔chromium〕A lustrous, hard, steel-gray metallic element, resistant to tarnish and corrosion and found primarily in chromite. It is used as a catalyst, to harden steel alloys and produce stainless steels, in corrosion-resistant decorative platings, and as a pigment in glass. Atomic number 24; atomic weight 51.996; melting point 1,890°C; boiling point 2,482°C; specific gravity 7.18; valence 2, 3, 6. See table at element 铬：一种有光泽的、蓝灰色的坚硬金属元素。不失光泽，抗腐蚀，最早在铬铁矿中发现。用作催化剂，可加强钢合金的强度和生产不锈钢，可以做防腐镀层和玻璃制品中的颜料。原子序数24；原子量51.996；熔点1,890°C；沸点2,482°C；比重7.18；化合价2，3，6 参见 element〔vanadium〕A bright white, soft, ductile metallic element found in several minerals, notably vanadinite and carnotite, having good structural strength and used in rust-resistant high-speed tools, as a carbon stabilizer in some steels, as a titanium-steel bonding agent, and as a catalyst. Atomic number 23; atomic weight 50.942; melting point 1,890°C; boiling point 3,000°C; specific gravity 6.11; valence 2, 3, 4, 5. See table at element 钒：存在于多种矿物质中，特别是钒铅矿和钒钾钠矿中的一种亮白色、柔软且可延展的金属元素，具有良好的结构强度，用于防锈的高速工具，例如在某些金属中的炭稳定剂，作为钛金属的黏结剂，以及作为催化剂。原子序数23；原子量50.942；熔点1,890°C；沸点3,000°C；比重6.11；原子价2，3，4，5 参见 element〔platinum〕Symbol Pt A silver-white metallic element occurring worldwide, usually mixed with other metals such as iridium, osmium, or nickel. It is ductile and malleable, does not oxidize in air, and is used as a catalyst and in electrical components, jewelry, dentistry, and electroplating. Atomic number 78; atomic weight 195.09; melting point 1,772°C; boiling point 3,827°C; specific gravity 21.45; valence 2, 3, 4. See table at element 符号 Pt 铂：一种世界范围内存在的银白色金属元素，常与其它金属，如铱、锇或镍混合，易拉长且具延展性的，在空气中不氧化，可用作催化剂，用于电学元件、珠宝，牙科学和电镀中。原子序数78；原子量195.09；熔点1,772°C；沸点3,827°C；比重21.45；化合价2,3,4 参见 element |
| 随便看 |
|
英汉汉英双解词典收录301015条英汉双解翻译词条，可根据汉字查询相应的英文词汇，基本涵盖了全部常用汉字的英文读音、翻译及用法，是英语学习及翻译工作的有利工具。