What are antioxidant defenses?
Antioxidant defenses can be enzimatic (SOD, GPx, and catalase) and non-enzimatic (glutation, vitamin C and E, carotenoids, lipoic acid, transferrine, and polyphenols). Flavonoids often exhibit strong antioxidant properties due to its ability to trap free radicals.
What are three examples of antioxidants and what are the three enzymes that also help inactivate free radicals?
The repair enzymes that can regrate some antioxidants are SOD, GPx, glutathione reductase (GR), CAT and the other metalloenzymes. In addition to dietary antioxidants, the body relies on several endogenous defence mechanisms to help protect against free radical-induced cell damage.
How do antioxidants neutralize free radicals?
Antioxidants neutralize free radicals by giving up some of their own electrons. In making this sacrifice, they act as a natural “off” switch for the free radicals. This helps break a chain reaction that can affect other molecules in the cell and other cells in the body.
What is enzymatic and non enzymatic?
Enzymatic browning is the process of food turning brown due to an enzyme-catalyzed chemical reaction that takes place in that food. Nonenzymatic browning is the process of food turning brown due to a chemical reaction that is not catalyzed by an enzyme.
What are enzymatic and non-enzymatic antioxidants?
The antioxidant enzymes convert dangerous oxidative products to hydrogen peroxide (H2O2) and then to water, in a multi-step process in presence of cofactors such as copper, zinc, manganese, and iron. Non-enzymatic antioxidants work by interrupting free radical chain reactions.
What do antioxidants prevent by neutralizing free radicals Milady?
86 Cards in this Set
| Chemistry | the science that deals with the composition, structure, and properties of matter and how matter changes under different conditions |
|---|---|
| Antioxidants prevent oxidation by _____ | neutralizing free radicals |
How can we protect free radicals?
Keep in mind that free radical content is high in nutrient-poor meals and those deficient of antioxidants.
- Avoid high glycemic foods, or foods that are rich in refined carbohydrates and sugars.
- Limit processed meats such as sausages, bacon and salami.
- Limit red meat.
- Don’t reuse cooking fats and oils.
- Limit alcohol.
What is non enzymatic?
Definition of nonenzymatic : not involving the action of enzymes : not enzymatic nonenzymatic reactions.
How can non enzymatic browning reactions be prevented?
Nonenzymatic browning in fruit and vegetable products can be inhibited by refrigeration; control of water activity in dehydrated foods; reduction of reducing sugar content in potatoes by storage, or glucose oxidase treatment; reduction of amino nitrogen content in juices by ion exchange; packaging with oxygen …
Which is non-enzymatic antioxidant?
Few examples of the non-enzymatic antioxidants are vitamin C, vitamin E, plant polyphenol, carotenoids, and glutathione. The other way of categorizing the antioxidants is based on their solubility in the water or lipids. The antioxidants can be categorized as water-soluble and lipid-soluble antioxidants.