THE ENZYME CATALASE

A. Enzyme


Enzymes are proteins that catalyze chemical reactions and affect the speed of the reaction but did not participate in the reaction. Enzymes act as biocatalicator. The enzyme has the following properties:• Speed ​​up the chemical reaction• Work in a typical (specific), meaning that each enzyme only works for one compound (substrate) certain• Only work on a specific range of temperature and pH• Damaged temperature is too high or too low• The chemical has not changed by the reaction where the enzyme works• Can work commute
Factors that affect the working of enzymes:a. temperaturesAt the optimum temperature, the enzyme activity is very good. If the temperature is too low the reaction to be slow, and if the temperature is too high enzyme will be damaged.

b. pH
Enzymes work well at optimum pH. The state of acids and bases that are too high to inhibit the activity of enzymes.
c. The concentration of the enzyme and substrateIf too little enzyme and the substrate is too much, the reaction will be slow and there is even a substrate which is not catalyzed. The more the enzyme reaction will be faster.
d. Inhibitor enzymeIf the inhibitor is added to the mixture of enzyme and substrate, the reaction rate will drop.

B. Enzyme Catalase and Hydrogen Peroxide
• The enzyme catalase
The enzyme catalase is one of the types of enzymes that are common in the cells of living creatures, one of which is a plant cell. The enzyme catalase is an enzyme decomposers hydrogen peroxide which is toxic and is a waste or byproduct of metabolism. If H2O2 are not broken down by this enzyme, it will cause death in plant cells. Therefore, this enzyme works to remodel H2O2 into harmless substances, namely in the form of water and oxygen. In addition to work specifically on certain substrates, enzymes also are thermolabile (susceptible to temperature changes) as well as a class of protein compounds. The effect of temperature is obvious, because it can damage the enzyme and make denatured protein like most
• Hydrogen peroxide
Hydrogen peroxide H2O2 chemical formula invented by Louis Jacques Thenard in 1818. This compound is an inorganic chemicals which have strong oxidizing properties. Raw material for making hydrogen peroxide is hydrogen gas (H2) and oxygen gas (O2). The technology is widely used in the auto industry is the oxidation of hydrogen peroxide Anthraquinone. H2O2 is a colorless, odorless typical bit of acidity, and dissolve well in water. Under normal conditions (ambient conditions), hydrogen peroxide is very stable with decomposition rate of approximately less than 1% per year. The majority of the use of hydrogen peroxide is to utilize and manipulate the decomposition reaction, which essentially produces oxygen. At this stage of the production of hydrogen peroxide, the chemical stabilizer material is usually added for the purpose of inhibiting the rate of decomposition. Including decomposition occurs during hydrogen peroxide product in storage. In addition to producing oxygen, hydrogen peroxide decomposition reaction also produces water (H2O) and heat. decomposition exothermic reaction that occurs is as follows: H2O2 H2O + 1 / 2O2 + 23:45 kcal / mol
Factors that affect the hydrogen peroxide decomposition reaction is:1.Material certain organic, such as alcohol and gasoline2.Catalis, such as Pd, Fe, Cu, Ni, Cr, Pb, Mn3.Temperature, hydrogen peroxide decomposition reaction rate increased by 2.2 x each increase of   10°C (the temperature range 20-100°C)
4.surface container uneven (active surface)5.solid were suspended, such as particles of dust or other impurities6.very high pH (more alkaline) the higher the decomposition rate7.Radiation, especially the radiation of light with short wavelengths
C. The liver in general
The liver is the largest organ in us. In adults weighing up to approximately 1.3 kg. Divided into two lobes, the left and right. In addition to large in size, the liver also had a great role. He was involved in the digestion process, plays a role in hundreds of different chemical reactions of the body, and also serves as a storage organ. The main function of the liver is to collect blood from the gastrointestinal tract through the hepatic circulation and enter a variety of chemical substances the body into it before it is released back to the other body parts. The chemical substances produced by millions of liver cells known as hepatocytes. Hepatocytes was submerged in a pool of blood coming from the gastrointestinal tract. That's how the exchange of substances between blood and liver cells. Liver function is not fully understood. Some functions of the organ are:
 
-This Setting blood sugar levels-Metabolism fat-Metabolism protein-Storage vitamin-Storage mineral-Production bile-Detoxification-Recycling hormone