Antioxidants and phytochemical talk 05 07-11
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This document summarizes several classes of phytochemicals and antioxidants found in plants, including vitamins, carotenoids, essential fatty acids, phytosterols, and phenolic compounds. It describes their structures, food sources, and antioxidant mechanisms of action, such as preventing lipid oxidation, quenching singlet oxygen, and reducing free radicals. The document also discusses enzymatic antioxidants like superoxide dismutase and catalase, as well as synthetic antioxidants added to foods.
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Antioxidants
In this ppt, we will explane what is the antioxidant and what is the free radical and also, we ex plane the mode of action for the poth.
Also we have mentioned the evaluation of antioxidant . And mentioned the drug candidate and other uses like anti aging.
I think it is important subject, read it and if there any notes please tell us .
thanks, enjoy^_^
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In this ppt, we will explane what is the antioxidant and what is the free radical and also, we ex plane the mode of action for the poth.
Also we have mentioned the evaluation of antioxidant . And mentioned the drug candidate and other uses like anti aging.
I think it is important subject, read it and if there any notes please tell us .
thanks, enjoy^_^
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Skin is the largest organ of the body. It assumes t a few critical physiological capacities and speaks to likewise a "social interface" between an individual and different individuals from society. This is the principle reason its age-subordinate alterations are in the front line of dermatological research and of the "anti-aging" cosmetic industry. Here we focus on a few perspectives just of skin aging, similarly as the phone and extracellular lattice segments of skin are concerned. Most very much considered instruments of skin maturing can be arranged at the post hereditary level, both epigenetic and post-translational components being included(1).
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The document discusses reactive oxygen species (ROS) and antioxidants. ROS such as superoxide, hydrogen peroxide, and hydroxyl radicals are produced through normal cellular processes but can cause tissue damage if levels become too high. Antioxidants help prevent this damage by neutralizing ROS. The document outlines various antioxidants like vitamins C and E, carotenoids, polyphenols, glutathione, and superoxide dismutase. It also describes how ROS can damage proteins, lipids, and DNA and discusses the role of antioxidants and ROS in periodontal disease pathogenesis.
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Receptive species or free radicals incorporate responsive oxygen and nitrogen species all in all and are called receptive oxygen nitrogen species (RONS). They are discharged from macrophages, neutrophils and dendritic cells because of a provocative boost. RONS are profoundly receptive because of the nearness of unpaired valence shell electrons or non-static bonds, and their legitimate control is key for a proficient resistant reaction and for constraining tissue harm (3).Reactive oxygen species, synthetically responsive atoms, containing oxygen, are framed as a characteristic result of the ordinary digestion of oxygen and have huge parts in cell flagging and homeostasis.
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This document discusses various antioxidant-rich beverages and their health benefits. It begins by explaining what antioxidants and free radicals are, and how antioxidants protect the body from free radical damage. It then examines several beverages - green tea, black tea, herbal tea, coffee, red wine, pomegranate juice, and various berry juices. Each beverage is highlighted for its specific antioxidants and associated health benefits, such as improving heart health, boosting immunity, reducing inflammation, and protecting against cancer and aging. The document emphasizes that consuming antioxidant-rich beverages can help maintain a balance between free radicals and antioxidants in the body.
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1. Antioxidants are molecules that inhibit oxidation and prevent destructive effects of oxidation in the body, food, and plastics.
2. They terminate oxidation chain reactions by removing free radicals and inhibiting other oxidation reactions.
3. While oxidation is critical for life, it can also be damaging, so plants and animals maintain antioxidant systems like glutathione, vitamin C, and vitamin E, as well as antioxidant enzymes.
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This document summarizes the role of reactive oxygen species (ROS) in activating apoptosis and autophagy in cancer cells. It discusses how ROS are generated endogenously and exogenously, and how cells have antioxidant systems to maintain homeostasis. At high concentrations, ROS can induce apoptosis through both intrinsic and extrinsic pathways by modulating proteins like caspases, Bax, and Bcl-2. ROS have also been shown to induce autophagy by activating proteins involved in autophagosome formation like ATG4, Beclin-1, and modulating signaling pathways such as AMPK/mTOR. Many chemotherapy drugs and natural compounds exert their anticancer effects at least partially through increasing ROS levels and
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1 BIOMOLECULES.pptx
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12 lipids ii_-_eicosanoids__isoprenoids__steroids
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Vitamin.ppt nutritionallllllbiochemistry
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Lipid bio chemistry
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nutritional aspects of biotransformation
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- Steroids are compounds with four fused carbon rings that include cholesterol, steroid hormones, and lanosterol.
- Sterols are steroid alcohols that include cholesterol, phytosterols in plants, and ergosterol in fungi.
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Antioxidants and phytochemical talk 05 07-11
- 1. Phytochemicals John Parry, Ph.D. Rm 229, M.T. Carter Bldg Agricultural Research Station Phone: (804) 524-5957 Email: jparry@vsu.edu
- 21. Antioxidant Basic Phenol Radical Resonance for Stability
Editor's Notes
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- Phenolic compounds can also be stable free radical compounds. 18:2n-6 -> 20:4n-6 ( Arachidonic acid) -> 2-prostaglandins, 2-thromboxane, 5-HPETE, leukotriene A4, leukotriene C4 act as local hormones for pain, swelling, inflammation, and platelet aggregation 18:3n-3 -> 20:5n-3 (EPA) -> 22:6n-3 (DHA) -> 3-prostaglandins, 3-thromboxane, 5-leukotrienes act as local hormones and are anti-inflammatory and anti-aggregative