Results 211 to 220 of about 76,318 (257)
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Phytochemistry, 1979
Abstract Recent progress in the study of plant polyphenol oxidases is critically reviewed. Two main groups are recognized: the catecholoxidases and the laccases. Their purification, subcellular location and protein properties are described. Attention is also given to their activation and induction, their function and evolution.
Alfred M. Mayer, Eitan Harel
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Abstract Recent progress in the study of plant polyphenol oxidases is critically reviewed. Two main groups are recognized: the catecholoxidases and the laccases. Their purification, subcellular location and protein properties are described. Attention is also given to their activation and induction, their function and evolution.
Alfred M. Mayer, Eitan Harel
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Chemistry and Safety of Plant Polyphenols
1984Phenolic compounds are widely distributed in plant kingdom and are considered to be secondary metabolites. They do not seem to be essential for plant life, at least at the cellular level. Plants provide nearly all the phenols found in higher animals, since the latter can not synthesize compounds with benzenoid rings from aliphatic precursors.
S S, Deshpande +2 more
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Phytochemistry, 1964
Abstract Traces of free tricin have been detected in the leaves of sixteen grasses and two tricin glucosides (one being the 5-monoglucoside) have been isolated from Triticum dicoccum, T. monococcum and T. polonicum . However, the major phenolic constituents of grasses are glycoflavones and eight, present in Avena and Triticum , have been ...
J.B. Harborne, E. Hall
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Abstract Traces of free tricin have been detected in the leaves of sixteen grasses and two tricin glucosides (one being the 5-monoglucoside) have been isolated from Triticum dicoccum, T. monococcum and T. polonicum . However, the major phenolic constituents of grasses are glycoflavones and eight, present in Avena and Triticum , have been ...
J.B. Harborne, E. Hall
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Phytochemistry, 1967
Abstract A range of twenty-four known flavonoids have been reductively cleaved with alkali and sodium amalgam under nitrogen and the phenols, phenolic alcohols and phenolic acids produced were separated and identified by chromatography on thin layers of silica gel and of microcrystalline cellulose.
H.M. Hurst, J.B. Harborne
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Abstract A range of twenty-four known flavonoids have been reductively cleaved with alkali and sodium amalgam under nitrogen and the phenols, phenolic alcohols and phenolic acids produced were separated and identified by chromatography on thin layers of silica gel and of microcrystalline cellulose.
H.M. Hurst, J.B. Harborne
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Chemoprevention of liver cancer by plant polyphenols
Food and Chemical Toxicology, 2012Primary liver cancer or hepatocellular carcinoma (HCC) is one of the most frequent tumors representing the fifth commonest malignancy worldwide and the third cause of mortality from cancer. Currently, the treatments for HCC are not so effective and new strategies are needed for its fight. Chemoprevention, the use of natural or synthetic chemical agents
Dimitrios, Stagos +5 more
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Inhibition of glutathione reductase by plant polyphenols
Biochemical Pharmacology, 1997The effects of forty-one plant polyphenols on the activity of glutathione reductase (GSH-RD) were studied. These polyphenols showed varying degrees of concentration-dependent inhibition on the enzyme, with IC50 values that varied from approximately 40 microM to 1 mM.
Zhang, K. +4 more
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Chemosensitization and Radiosensitization of Tumors by Plant Polyphenols
Antioxidants & Redox Signaling, 2005The treatment of cancer with chemotherapeutic agents and radiation has two major problems: time-dependent development of tumor resistance to therapy (chemoresistance and radioresistance) and nonspecific toxicity toward normal cells. Many plant-derived polyphenols have been studied intently for their potential chemopreventive properties and are ...
Amit K, Garg +2 more
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Role of Plant Polyphenols in Alzheimer’s Disease
2016Alzheimer's disease (AD) is the most common neurodegenerative disease, characterized by notable memory loss, cognitive impairment, and personality disorders accompanied with structural abnormalities in the brain of aged population. Currently approved drugs for AD offer symptomatic relief without preventing the progression of the disease and having ...
Arokiasamy Justin, Thenmozhi +2 more
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Role of plant polyphenols in genomic stability
Mutation Research - Fundamental and Molecular Mechanisms of Mutagenesis, 2001Polyphenols are a large and diverse class of compounds, many of which occur naturally in a range of food plants. The flavonoids are the largest and best-studied group of these. A range of plant polyphenols are either being actively developed or currently sold as dietary supplements and/or herbal remedies. Although, these compounds play no known role in
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Polyphenols: Plant Sources and Food Industry Applications
Current Pharmaceutical Design, 2019Background: Numerous epidemiological studies have demonstrated the association between (poly)phenol-rich foods and human health. Growing consumer knowledge of the relationship between diet, good health and disease prevention stimulated manufacturing opportunities.
Marranzano, Marina +5 more
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