| A modest investment could be a catalyst for the rejuvenation of an historic industrial area. |
| Secondary alcohols can be formed by reduction of the ketone by hydrogen gas in the presence of a catalyst. |
| A catalyst for this reevaluation was horrifying devastation caused by use of the atomic bomb in Japan. |
| An occasional catalyst for regime change during the colonial era was the mass strike. |
| The case may turn out to be one of those terrible incidents that provide a wake-up call and a catalyst for positive change. |
| His murder was the catalyst for the outbreak of gun terror around Chapeltown as Yardies and home-grown dealers battled for supremacy. |
