The optimal conditions for synthesis of alkali green 4 include the carbamide and zinc chloride as catalyst, chloranil and bichrome.

合成碱绿色4的最佳条件包括：尿素和氯化锌作为催化剂，四氢呋喃和双色。

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But in the end, a donor can only act as catalyst.

但是，捐助方最终只能起到催化作用。

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When some young people look at that, they also see it as catalyst for social improvement.

当一些年轻人目睹这一现状时，他们也理所当然地将其视为社会改良的催化剂。

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"This will serve as a catalyst to help Nigeria to be ready, to improve itself, to look at the organization, to look at the quality of the facilities,and therefore I hope this will serve as a kind of stepping stone for Nigeria to be ready,".

VOA: standard.2009.10.22

Proven performance results of board diversity: Numerous studies(from groups such as Catalyst and McKinsey) link better corporate performance and board diversity.

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Research work from other organizations, such as Catalyst, support these findings.

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But despite all the concerns about the speed of the preparations for the World Cup, Mr Loes says it will act as catalyst for Brazil's greater infrastructure development.

BBC: Brazil: Will it be ready for the World Cup?