Vitamin E is an important topic because many benefits and some risks have
been attributed to it when used as a nutritional supplement. Moreover, there
has been considerable progress in the basic science of this vitamin in recent
years. This volume reviews recent aspects of the biochemistry and molecular
biology of this vitamin, associated macromolecules, metabolism of the
vitamin and its derivatives, and its many roles in health and disease. The
various contributions comprising this volume are listed here in the order in
which they are presented in the volume....
Natural colour isolated from the seeds of the
annatto tree (Bixa orellana ).
The scientific species name orellana is derived
from the name of Francisco de Orellana, a
Spanish explorer of the 16.th century.
Treatment of pellagra consists of oral supplementation of 100–200 mg of nicotinamide or nicotinic acid three times daily for 5 days. High doses of nicotinic acid (2 g/d in a time-release form) are used for the treatment of elevated cholesterol and triglyceride levels and/or low high-density lipoprotein (HDL) cholesterol level (Chap. 350).
Toxicity Prostaglandin-mediated flushing due to binding of the vitamin to a G protein–coupled receptor has been observed at daily doses as low as 50 mg of niacin when taken as a supplement or as therapy for dyslipidemia.
Trace element (iron, manganese, cobalt, copper, zinc, selenium, and molybdenum): chemical element that is needed in minute quantities for the proper growth, development, and physiology of the organism.
In biochemistry, a trace element is also referred to as a micronutrient.
The functional replacement of the primary ubiquinone (QA)
in the photosynthetic reaction center (RC) from Rhodo-bacter sphaeroideswith synthetic vitamin K derivatives has
provided a powerful tool to investigate the electron transfer
mechanism. To investigate the binding mode of these qui-nones to theQAbinding sitewe have determined the binding
free energy and charge recombination rate from QA
(kAD) of 29 different 1,4-naphthoquinone derivatives with
systematically altered structures.
unabsorbed polyphenols may play a role in the protection of the GI tract against RONS
prior to their fecal excretion. In contrast to native polyphenols, less data exists on the
antioxidant activity of bioavailable polyphenol phase II metabolites (conjugated
Dermatology has made remarkable strides in recent decades, with the advent of high-tech aids such as lasers and cryosurgery and new wonder drugs such as steroids and vitamin A derivatives; thus, many skin sufferers have been cured by their physicians. Yet many have not. If you have brought your persistent eczema, your
Prokaryotes, yeasts and plants synthesize thiamin (vitamin B1) via complex
pathways. Animal cells capture the vitamin through specific high-affinity
transporters essential for internal thiamin homeostasis. Inside the cells, thi-amin is phosphorylated to higher phosphate derivatives. Thiamin diphos-phate (ThDP) is the best-known thiamin compound because of its role as
an enzymatic cofactor.