Master in food science

Good evening … can you help me to write a scientific plan related to foid science ?

Can you give us more details please ?

Tomato paste : Aseptic filling is free from any preservative. It remains shelf stable until in packaging materials almost for two years.
Heat treatment, water activity and ph arethe major barrier to prevent from microbial growth.

Fugal growth is very fast as soon as coming into contact with environment
air at room temperature.