catalyst

catalizzatore

Persona o cosa che aiuta ad avviare un cambiamento importante o lo accelera.

In inglese semplice: A person or thing that helps an important change begin or happen faster.

• The protest became a catalyst for change.
• Her arrival acted as a catalyst for reform.
• Could this discovery be a catalyst for further research?

Come si usa: catalyst for something (The crisis was a catalyst for reform.)

Sinonimi: spark, stimulus

Espressioni comuni: catalyst for change, act as catalyst, catalyst for something

catalizzatore

Sostanza che accelera un cambiamento chimico senza consumarsi nel processo.

In inglese semplice: A substance that makes a chemical change happen faster without being used up.

• The reaction needs a catalyst.
• Platinum acts as a catalyst in this process.
• Scientists tested several catalysts to speed up the reaction.

Espressioni comuni: chemical catalyst, use a catalyst, catalyst in something

catalizzatore

Dispositivo di un veicolo che rende meno nocivi i gas di scarico.

In inglese semplice: A device in a vehicle that makes harmful exhaust gases less harmful.

• The mechanic replaced the catalyst.
• A damaged catalyst can increase exhaust pollution.
• This car needs a new catalyst to pass inspection.

Sinonimi: catalytic converter

Espressioni comuni: exhaust catalyst, replace a catalyst, damaged catalyst