Often these reactions require "help" to happen at a faster speed, and this can be supplied by enzymes—tiny types of proteins. The liver uses specialized enzymes to help it break down toxic substances and make them safer for the body to process.
But an enzyme, just like the chemical reactions it modifies, needs certain conditions to do its work. So, some environments can make a liver enzyme effective, whereas others can prevent it from working at all. Background A chemical reaction occurs when compounds come together and their molecules interact to form new compounds. Sometimes these reactions happen by themselves, are usually very fast and spontaneous, and give off energy. Other chemical reactions need energy, without which they would proceed very slowly or not at all.
Enzymes can help speed up these types of chemical reactions. Enzymes are large proteins that speed up the rate of a chemical reaction by acting as a catalyst. A catalyst provides the necessary environment for the reaction to occur, thereby quickening it. Certain catalysts work for certain kinds of reactions; in other words, each enzyme has a particular type of reaction that it can activate.
Enzymes can be very fussy and sometimes need to be in certain environments or conditions to work well—or at all. Some enzymes can even be damaged, such as when exposed to too much heat. A damaged enzyme may no longer work to catalyze a chemical reaction. Catalase is an enzyme in the liver that breaks down harmful hydrogen peroxide into oxygen and water.
When this reaction occurs, oxygen gas bubbles escape and create foam. Be careful using the sharp knife. An adult may need to help with this. Blend on high speed, pulsing when necessary, until the liver is smooth and no chunks are present. Be careful of the sharp blades in the blender.
To the blended liver drop, add one drop of hydrogen peroxide. You should see a lot of bubbles! What do you think the bubbles are made of? This shows that the liver enzyme catalase is working to start the chemical reaction that breaks down the hydrogen peroxide that would be harmful to the body into less dangerous compounds. People began using hydrogen peroxide for wound care in the s.
Your parents might have even poured a little hydrogen peroxide on your skinned knees when you were a child. You may remember watching foamy white bubbles sprout up across the surface of your wound. Those bubbles are actually a chemical reaction at work. Oxygen gas is created when hydrogen peroxide reacts with an enzyme called catalase in your skin cells.
As you watched those bubbles develop on your skinned knee, you may have thought the hydrogen peroxide was killing off all the germs and helping your injured skin heal faster. And as a review points out, hydrogen peroxide does have antimicrobial qualities. It can help loosen and sweep away debris and other material that might get into a wound. While it might initially kill off some bacteria, hydrogen peroxide can be mildly irritating to your skin.
Plus, it may damage some of your skin cells and risk the process of new blood vessel production. Stronger versions can cause much more serious damage. Your best bet: good old-fashioned mild soap and warm water. Gently wash your burn and pat it dry. Then, apply a moisturizer and covering it loosely with a bandage. It causes some pain and redness, but in a relatively small area, perhaps a maximum of 3 inches in diameter.
Here are some first aid tips for minor burns :. A first degree burn is a minor burn that only affects the top layer of skin. A superficial partial thickness burn goes down beyond the top layer of the skin epidermis into the lower layer, known as the dermis. Your skin may become moist, red, and swollen, and you may develop blisters. If you push down on the skin, it may turn white, a phenomenon called blanching.
A deep partial thickness burn extends even deeper through the dermis. Your skin could be wet, or it could be waxy and dry. Try pouring hydrogen peroxide on a whole potato. Next, compare that reaction to the one you get when you pour peroxide on a slice of cut potato. You can also test the reactions of other substances, like how alcohol burns on skin or wounds. Actively scan device characteristics for identification. Use precise geolocation data. Select personalised content.
Create a personalised content profile. Measure ad performance. Select basic ads. Create a personalised ads profile. Select personalised ads. Apply market research to generate audience insights. Measure content performance. Develop and improve products. List of Partners vendors. Share Flipboard Email. Anne Marie Helmenstine, Ph. Chemistry Expert. Helmenstine holds a Ph. She has taught science courses at the high school, college, and graduate levels.
Facebook Facebook Twitter Twitter.
0コメント