Vitamin C contributing to the more severe symptoms of scurvy. More generally, the biochemical role of vitamin C is to act as an antioxidant (a reducing agent) by donating electrons to various enzymatic and non-enzymatic reactions. Doing so converts vitamin C to an oxidized state - either as semidehydroascorbic acid or dehydroascorbic acid. These compounds can be restored to a reduced state by glutathione and NADPH-dependent enzymatic mechanisms. In plants, vitamin C is a substrate for ascorbate peroxidase. This enzyme utilizes ascorbate to neutralize toxic hydrogen peroxide (HO) by converting it to water (HO). Scurvy is a disease resulting from a deficiency
The History of Iron Maiden – Part 1: The Early Days The History of Iron Maiden – Part 1: The Early Days The History of Iron Maiden – Part 1: The Early Days is a DVD video by Iron Maiden, released in 2004. It features the first part of "The History of Iron Maiden" series, a 90-minute documentary which describes their beginnings in London's East End in 1975 through to the "Piece of Mind" album and tour in 1983. The set also features a large collection of rare videos and concert footage, as well as interviews with former members such as Paul Di'Anno, Clive Burr, Dennis Stratton, Dave Sullivan, Terry Rance,