Roger Frost: science, sensors and automation

Tagged: enzyme

science experiments

enzymes: starch & amylase; pepsin & protein

Two experiments: in one amylase catalyses the hydrolysis of starch. Iodine can be used as an indicator to show that the starch has been broken down. A light sensor can be used, like a colorimeter, to monitor this change.
Another experiment aims to show the effect of different temperatures on the action of amylase.This experiment studies
the effect of the enzyme pepsin on protein. Pepsin catalyses the hydrolysis of the protein, albumin into amino acids. As the protein solution is cloudy and amino acids are soluble the liquid changes from cloudy to clear. The light sensor can be used, like a colorimeter, to monitor this change.

science experiments

aerobic and anaerobic respiration

visitors this year: 193 When a living thing, such as yeast, respires it produces heat. It may do this in the presence or absence of oxygen. These processes are called aerobic respiration and anaerobic...

science experiments

lipase and milk fat

visitors this year: 712 Fats, such as the fats in milk, need to be digested by your body. They are broken down into fatty acids and glycerol by an enzyme called lipase. You can...

science experiments

fermentation

visitors this year: 107 In the manufacture of yoghurt, bacteria turn lactose into lactic acid. The acid denatures or spoils the milk protein and sets it solid. In the process, the milk starts to...

science experiments

investigating the enzyme amylase

visitors this year: 94 Amylase catalyses the breakdown of starch into sugar. How is the activity of this enzyme affected by temperature? You can start to find out by monitoring the activity at different...

handling data from experiments

pH data on souring milk

visitors this year: 105 The label on my milk bottle tells me how long the milk will ‘last’ at different temperatures. What do they measure to make this assessment? Is it the pH? I summoned...

science experiments

measure lipase enzyme activity

visitors this year: 175 If you’ve a couple of pH electrodes and sensors, the following is one of the most successful enzyme measurements I’ve tried. Before bothering further, connect the pH electrodes to a...