P10. CATALASA

OBJECTIVES:

• watch quantity of catalansa in the potato and in the liver

• the funcion of the catalasa 

MATERIAL:

• Beaker

• H2O2

• Potato

• liver

• Test tube x4

• Termomether

•  Bunsen Burner

• Knife 

• plug

• Destillated water 

PROCEDURES: 

experiment 1: 

• first we need to cut a pice of potato and a pice of liver

• we put a quantiti of destilated water inside the beaker 

• then we put this pices inside the beaker 

• and we put the beaker in the fire  

 experiment 2:

• we take two test tube and we put 5ml of h2o2 inside the test tube

• and we put a pice of potato and a pice of liver inside the test tube ( no boil)

• then we waited and we saw the results

experiment 3:

• we take 2 test tube and we put one pice of fetge in one test tube and a pice of potato in the other test tube 

• we put H2O 

• we cover the test tube with a thermomether and then we need to see the temeprature 

 RESULTS:

LIVER
TIME	30seg	1min	1min i 30seg	2min	2min i 30seg	3min	3min i 30seg
TEMPERATURE	28º	30º	35º	35º	35º	35º	35º

POTATO
TIME	30seg	1min	1min i 30seg	2min	2min i 30seg	3min	3min i 30seg
TEMPERATURE	28º	28º	28º	28º	28º	28º	28º

QUESTIONS:

1. What happens when the tissues are boiled? The tissues lose the quaternary, terciary and secondary structure.

2. What happens with the temperature? increase

3. Why the peroxide of hydrogen is a good disinfectant?

Oxygenated water is used to heal and disinfect wounds because it is a strong oxidizer such as chlorine (which is used to purify water) but acts differently.Strong oxidants act on both aerobic and anaerobic microorganisms because they destroy the outer membranes of microorganisms and thus their integrity. Oxygen is released by reacting with the organic matter and decomposing, producing an effervescence.

4. Which tissue has more catalase? The live has more catalase.