What is antioxidant activity Slideshare?

What is antioxidant activity Slideshare?

An antioxidant is a molecule capable of inhibiting the oxidation of other molecules. Oxidation reactions can form free radicals and these start chain reactions that damage cells . Antioxidants terminate these chain reactions by removing free radical intermediates and inhibit other oxidation reactions.

What are antioxidants PDF?

Antioxidants are a class of chemical substances naturally found in our food which can prevent or reduce the oxidative stress of the physiological system. The body is constantly producing free radicals due to regular use of oxygen.

What are antioxidant activities?

Antioxidant activity can be defined as a limitation or inhibition of nutrient oxidation (especially lipids and proteins) by restraining oxidative chain reactions. From: Olives and Olive Oil in Health and Disease Prevention (Second Edition), 2021.

What are the biological roles of antioxidants?

Antioxidants destroy the presence of free radicals and prevent the growth of free radicals by preventing oxidation. Oxidative stress is an important part of many human diseases, therefore, antioxidants play important roles in preventing the disease by inhibiting oxidation in a living system.

What is meant by antioxidant?

Listen to pronunciation. (AN-tee-OK-sih-dent) A substance that protects cells from the damage caused by free radicals (unstable molecules made by the process of oxidation during normal metabolism). Free radicals may play a part in cancer, heart disease, stroke, and other diseases of aging.

What are antioxidants with examples?

Examples of antioxidants include vitamins C and E, selenium, and carotenoids, such as beta-carotene, lycopene, lutein, and zeaxanthin.

What is total antioxidant activity?

Total antioxidant capacity (TAC) is the measure of the amount of free radicals scavenged by a test solution [4], being used to evaluate the antioxidant capacity of biological samples [3, 6, 7].

How are antioxidants able to inhibit the oxidation of other molecules?

3. An antioxidant is a molecule capable of inhibiting the oxidation of other molecules. Oxidation is a chemical reaction that transfers electrons or hydrogen from a substance to an oxidizing agent.Oxidation reactions can produce free radicals. In turn, these radicals can start chain reactions. 4. Types of Free Radicals 1.

How are antioxidants used to prevent the formation of ROS?

Preventive antioxidants Attempt to stop the formation of ROS. These include superoxide dismutase (SOD) that catalyses the dismutation of superoxide to H2O2 and catalase that breaks it down to water. Interception of free radicals Is mainly by radical scavenging, while at the secondary level scavenging of peroxyl radicals are effected.

Which is mode of antioxidant defense system ( ADS )?

Mode of Antioxidant defense system (ADS) Antioxidant defense system (ADS) traditionally have been termed. primary defense system secondary defense system Primary defense system Includes antioxidant compounds like a Vitamin A,E,C and Glutathione and uric acid.

What are the industrial uses of antioxidants?

22.  Industrial uses:  Antioxidants are frequently added to industrial products.  Common use : stabilizers in fuels & lubricants to prevent oxidation In gasolines to prevent polymerization that leads to the formation of engine –fouling residues.