University of Madras

About: University of Madras is a education organization based out in Chennai, Tamil Nadu, India. It is known for research contribution in the topics: Ring (chemistry) & Lipid peroxidation. The organization has 8496 authors who have published 11369 publications receiving 211152 citations. The organization is also known as: Madras University & University of Chennai.

Effects of acrolein on rat liver antioxidant defense system

Abstract: Effect of acrolein (2.5 mg/kg body wt/day) on the rat liver antioxidant defense system was investigated. Following 45 days of acrolein exposure, the levels of glutathione, ascorbic acid and the activity of catalase were decreased whereas the activities of superoxide dismutase and glutathione peroxidase were increased. The increase in the level of thiobarbituric acid reactive substances in the acrolein treated rats showed oxidative damage. The results indicate that acrolein interferes with the antioxidant defense system of rat liver.

Stereochemical criteria for polypeptides and proteins. IV. Standard dimensions for the cis‐peptide unit and conformation of cis‐polypeptides

Abstract: Using potential energy formulas for variation of bond angles and for ω-distortion, the conformation of minimum energy for the cis form of the peptide unit has been worked out. This agrees very well with the corresponding set of atoms in the crystal structure of Leu-Pro-Gly and the dimensions of a standard cis peptide unit are given based on these. The conformational (ϕ,Ψ) map for a cis peptide unit has been worked out from contact criteria, both for a pair of linked units as well as for-helices having constant (ϕ,Ψ). The small allowed region of the helical map contains the conformation experimentally observed for poly-L-proline I.

A revised list of the agaricoid and boletoid basidiomycetes from India and Nepal

Abstract: Most of the knowledge of Agaricales of the Indian subcontinent was based upon Berkeley’s descriptions of the collections made by Sir J D Hooker, mostly in Sikkim and the Khasi Hills. These specimens were deposited in the Herbarium of the Royal Botanic Gardens. Kew. Recent years have witnessed a fundamental change in agaric taxonomy, with a major emphasis being placed on microstructure. It has therefore become necessary to re-evaluate the early species of Berkeley and to ascertain their microstructure. The present study is aN attempt towards this end. In addition, the nomenciature of all published records of the Indian agaricoid and boletoid basidiomycetes has been revised and a modern check-list, together with keys to the species, is presented.