The document provides instructions for adding industrial enzymes to milk, incubating the sample, and then checking properties like color, consistency, smell, and pH using litmus tests and a pH meter. Microscope slides are also prepared with methylene blue stain to observe bacterial aggregation and amounts under a microscope. The instructions are part of a school project for a chemistry and biology class called "One step closer to a better future".

2. Add a sample of industrial enzymes into the milk

3. Add a sample of enzymes powder into the milk

4. The sample is ready for incubation

6. Check the colour, appearance, consistency and smell

7. Check the pH change with the litmus testCheck the pH change with pHmeter

9. Preparation of some slidesMonochromatic stain with Methylene blue

10. Observation by optical microscope

11. Recognition of bacteria aggregation and the approximate amount of the bacteria

12. Take part in the project “One step closer to a better future” Class 2°A Chemical and biology departmentThank you for your attention