Nominalisation is used frequently in academic writing to formalise the tone or voice of the sentence. The process is to take a key verb and convert it into the noun form of the verb. The effect of this is to move the focus of the sentence from action (the verb) to a key concept (the noun). It changes the effect of the sentence and makes it formal, academic and ideas-driven because the key word is now foregrounded at the front of the sentence.
i.i Verb Form:
The jet flow delivers the particles
The colours develop over the next five minutes.
The difference is not measured
i.ii Nominalised Form (Noun Form):
Delivery of the particles is achieved through the jet flow.
Development of the colours takes place across five minutes.
Measurements are taken to determine differences.