Results 201 to 210 of about 5,998,007 (252)

Diverse functions of antioxidants

Free Radical Research, 2000
All biological organisms have developed a defense system against oxidative stress, which is comprised of many kinds of antioxidants. Antioxidants are classified by function into four categories; preventive antioxidants; radical scavenging antioxidants; repair and de novo antioxidants; and adaptation.
N, Noguchi, A, Watanabe, H, Shi
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Antioxidant Functions of Ergothioneine

Reactive Oxygen Species, 2020
The function of ergothioneine (EGT) has been in controversy since the discovery of EGT in 1909. The present common understanding is that the functions of EGT remain unclear and that EGT does not seem to provide any advantage over other antioxidants. In this study, the ultraviolet-absorption spectra of EGT were measured at various pH.
Takeshi Saito, Kazuhisa Sakakibara, Yoshihisa Fukuoka, Kensei Kobayashi   +3 more
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Antioxidant functions of phytic acid

Free Radical Biology and Medicine, 1990
Phytic acid is a natural plant antioxidant constituting 1-5% of most cereals, nuts, legumes, oil seeds, pollen and spores. By virtue of forming a unique iron chelate it suppresses iron-catalyzed oxidative reactions and may serve a potent antioxidant function in the preservation of seeds. By the same mechanism dietary phytic acid may lower the incidence
E, Graf, J W, Eaton
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Antioxidant function of metallothioneins

The Journal of Trace Elements in Experimental Medicine, 1998
Since the discovery of metallothionein in 1957, it has been accepted that the primary roles of this protein are: 1) detoxification of heavy metals, and 2) regulation of the metabolism of essential metals. Recently, studies have suggested an additional role for metallothionein as a free radical scavenger.
Kelley Kiningham, Edward Kasarskis
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Antioxidant functions of carotenoids

Free Radical Biology and Medicine, 1989
Carotenoid pigments, including hydrocarbons such as beta-carotene or xanthophylls such as lutein and zeaxanthin, are very widely distributed in nature, where they play an important role in protecting cells and organisms against the harmful effects of light, air, and sensitizer pigments.
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Functions of Antioxidant Vitamins beyond RDAs

2001
Chemicals/CAS: Antioxidants ...
Diplock, A.T., Poppel, G. van
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Phenolic antioxidants-functionalized quaternized chitosan: Synthesis and antioxidant properties

International Journal of Biological Macromolecules, 2013
In this work, two kinds of phenolic antioxidants-functionalized quaternized chitosan were synthesized in order to develop aqueous soluble antioxidant-polymer conjugates. Quaternized chitosan conjugated with gallic acid or caffeic acid was carried out and the antioxidant properties of the products (namely gallic acid-quaternized chitosan and caffeic ...
Jianming, Ren, Qing, Li, Fang, Dong, Yan, Feng, Zhanyong, Guo   +4 more
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The Antioxidant Function of Metallothionein in the Heart

Proceedings of the Society for Experimental Biology and Medicine, 1999
Abstract.The antioxidant function of metallothionein (MT) was first suggested in the early 1980s. Studies in vitro have revealed that MT reacts directly with reactive oxygen species, including superoxide and hydroxyl radicals and hydrogen peroxide. These reactions have never been demonstrated in intact animal studies.
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Τhe Antioxidant Function of HDL in Atherosclerosis

Angiology, 2019
Atherosclerosis is a multistep process that progresses over a long period of time and displays a broad range of severity. In its final form, it manifests as a lesion of the intimal layer of the arterial wall. There is strong evidence supporting that oxidative stress contributes to coronary heart disease morbidity and mortality and antioxidant high ...
Eva Xepapadaki, Evangelia Zvintzou, Christina Kalogeropoulou, Serafoula Filou, Kyriakos E. Kypreos   +4 more
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Prion Disease: A Loss of Antioxidant Function?

Biochemical and Biophysical Research Communications, 2000
Prion disease, a neurodegenerative disorder, is widely believed to arise when a cellular prion protein (PrP(C)) undergoes conformational changes to a pathogenic isoform (PrP(Sc)). Recent data have shown PrP(C) to be copper binding and that it acquires antioxidant activity as a result. This enzymatic property is dependent mainly on copper binding to the
B S, Wong, T, Pan, T, Liu, R, Li, R B, Petersen, I M, Jones, P, Gambetti, D R, Brown, M S, Sy   +8 more
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