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 catalyst ['kætəlɪst]   添加此单词到默认生词本
n. 触媒, 接触剂, 催化剂, 刺激因素, 促进因素

[计] 催化剂

[化] 催化剂

[医] 催化剂


  1. The offer of a new job provided just the catalyst she needed.
    这份新工作正是她所需要转变的契机。
  2. 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
  3. 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


catalyst
[ noun ]
  1. (chemistry) a substance that initiates or accelerates a chemical reaction without itself being affected

    2. <noun.substance>
  2. something that causes an important event to happen

    3. <noun.person>
    the invasion acted as a catalyst to unite the country


catalyst \catalyst\ n.
1. (Chem.) a substance that initiates or accelerates a
chemical reaction without itself being affected; as,
thousands of enzymes serve in concert as calaysts to
produce the sequence of reactions we call ``life``; the
industrial production of cheap ammonia depended on finding
a good catalyst.
[WordNet 1.5]

2. something that serves as a precipitating occasion for an
event; as, the invasion acted as a catalyst to unite the
country.

Note: A catalyst is never the main cause of an event, but may
serve to hasten events for which the underlying causes
are present prior to the appearance or occurrence of
the catalyst.
[WordNet 1.5 +PJC]

3. something or someone that causes events to happen with
itself being changed.
[PJC]

  1. Some said Mr. Trump's buying could act as a catalyst, either for a hostile bid, for a restructuring that could spin off some MCA assets, or for the sale of the company to a friendly outsider.
  2. Susan Del Signore, a vice president of trading at Travelers Investment Management, Hartford, Conn., agreed that the market needs some kind of catalyst for any substantial move to take place.
  3. Himont Inc. said it is seeking a ban on further Japanese imports of propylene polymerization catalyst components because of alleged patent infringement.
  4. But the API report of swollen U.S. crude inventories, the apparent catalyst for this latest price fall, only reflects the world oil glut resulting from continued high production by the Organization of Petroleum Exporting Countries, oil analysts noted.
  5. The GE catalyst, however, causes the chemical chain at a certain point to "recognize" the end of its own chain, instead of the end of another chain.
  6. Sharif is seen by many groups in Pakistan as a possible catalyst to improve conditions in Pakistan, where most of its 110 million people are landless, illiterate and earn about $400 a year.
  7. Dr Mahathir sees the car sector as the catalyst for industrialisation: industries will grow to service the car sector and eventually diversify into other activities. This has been happening.
  8. Clearly, the catalyst was the outspoken Mr. Harper, who likes to say that "conflict is a good thing."
  9. The catalyst for the rally appeared to be a surprising surge in the value of the dollar overseas, which eased worries about inflation.
  10. In 1998, Ballard, working with Johnson Matthey of the UK to reduce the amount of platinum catalyst, plans to market the third and commercially viable phase. The 25 kW fuel cells will drive a large bus with a range of 560 km.
  11. "The catalyst is money," she says.
  12. Negotiations are proceeding briskly in both arenas in Vienna and Geneva, and the easing of tensions across the European landscape serves as a catalyst for even speedier resolution of the pacts.
  13. The government's report on Friday that the nation's civilian unemployment rate jumped to 5.6 percent in August from 5.4 percent in July was the catalyst for one of the bond market's most forceful rallies of the year.
  14. "All it took was a small catalyst to start the rally, and Baker and Sumita supplied the catalyst."
  15. "All it took was a small catalyst to start the rally, and Baker and Sumita supplied the catalyst."
  16. Ford said it owns two patents and expects to receive two more on a palladium-only catalyst that would be used in cars and light-duty trucks.
  17. That means further Fed action remains an important potential catalyst.
  18. Analysts agreed that Tuesday's 30-day forecast was the catalyst for the rally, which reversed, at least temporarily, a five-week trend of falling prices.
  19. The catalyst for the market's latest advance came Friday in the government's report of a smaller-than-expected 0.4 percent increase in the producer price index of finished goods for April.
  20. They sprinkled a layer of the catalyst over the bottom of a glass flask in an oxygen-free environment.
  21. Santa Fe said increased buying by Olympia & York wasn't "a catalyst" for inviting Olympia & York senior executive vice president Paul Reichmann and executive vice president Marshall A. Cohen to join Santa Fe's board.
  22. So in "Dying Young," disease not only cements the central romance, it proves to be a catalyst for the lovers' betterment.
  23. The main catalyst in financial markets was the failure of a last-ditch effort to find a diplomatic solution to the Mideast crisis in talks over the weekend between U.N. Secretary-General Javier Perez de Cuellar and Saddam Hussein.
  24. Such an agreement would eliminate the catalyst to capital flows within the EU, but Luxembourg may be difficult to bring into line. 'There is no point in reaching agreement just within the EU,' says a senior Luxembourg official.
  25. 'It's the catalyst we need to really establish Lyon as an international business centre,' says Mr Moulinier. He adds: 'We've done all the preparatory work.
  26. The electrically heated catalyst, however, has some big problems.
  27. Corning's converter will simply enhance current technology and whatever catalyst is being used now in a catalytic converter will still be used, he said.
  28. The catalyst for the U.S. selling bout was President Bush's proposal, made during Tuesday night's State of the Union Address, to reduce withholding taxes by about $25 billion.
  29. "I think they feel that this may bring another offer that would not have come without this catalyst," he added.
  30. Takeover-stock traders, stung by their huge losses in UAL stock, remained eager for some action by an outside catalyst following the collapse Oct. 13 of a $300-a-share, $6.79 billion labor-management buy-out.
catalyst
catalyst accelerator
catalyst activity
catalyst attrition
catalyst attritor
catalyst basket
catalyst bed
catalyst bulk density
catalyst carrier
catalyst case
catalyst chamber
catalyst charge
catalyst circulation
catalyst circulation ...
catalyst container
catalyst cooler
catalyst cracker
catalyst damage
catalyst deactivation
catalyst density unde...
catalyst deterioration
catalyst distillation
catalyst dosing tank
catalyst down-flow pr...
catalyst elevator
catalyst fines
catalyst flow control
catalyst flow plates
catalyst for shut-down
catalyst for stereosp...
catalyst for water pr...
catalyst furnace
catalyst hopper
catalyst induction pr...
catalyst inventory
catalyst life
catalyst line
catalyst make-up
catalyst mixture
catalyst modification
catalyst oven
catalyst particle
catalyst particle siz...
catalyst passivation
catalyst poison
catalyst poisoning
catalyst precursor co...
catalyst pretreatment
catalyst promoter
catalyst ratio
catalyst reactivation
catalyst recovery
catalyst reducer
catalyst reduction
catalyst refucer
catalyst regeneration
catalyst scrubber column
catalyst selectivity
catalyst separating
catalyst separation
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