In this review, we have focused mainly on the study of their antioxidant and pro-oxidant
capacity, and the analysis of the oxidation of the catechol group to o-quinone. The redox …

Tannins are the most abundant secondary metabolites made by plants, commonly ranging
from 5% to 10% dry weight of tree leaves. Tannins can defend leaves against insect …

Quinones represent a class of toxicological intermediates, which can create a variety of
hazardous effects in vivo including, acute cytotoxicity, immunotoxicity, and carcinogenesis …

Quinones are probably found in all respiring animal and plant cells. They are widely used as
anticancer, antibacterial or antimalarial drugs and as fungicides. Toxicity can arise as a …

Changes in the redox equilibrium of cells influence a host of cell functions. Alterations in the
redox equilibrium are precipitated by changing either the glutathione/glutathione-disulfide …

Quinones are ubiquitous in nature and constitute an important class of naturally occurring
compounds that are found in plants, fungi, and bacteria and that function primarily as …

Quinones are a group of highly reactive organic chemical species that interact with
biological systems to promote inflammatory, anti-inflammatory, and anticancer actions and to …

Juglone (5-hydroxyl-1, 4-naphthoquinone) is a phenolic compound found in walnuts.
Because of the antioxidant capacities of phenolic compounds, juglone may serve to combat …

Juglone (5-hydroxy-1, 4-naphthoquinone) and plumbagin (5-hydroxy-3-methyl-1, 4-
naphthoquinone) are yellow pigments found in black walnut (Juglans regia). Herbal …

Mitochondria have long been recognized as the generators of energy for the cell. Like any
other power source, however, mitochondria are highly vulnerable to inhibition or uncoupling …