Checklist of Mosses (Bryophyta) of Bodamalai Hills in Eastern Ghats, Tamil Nadu

Bodamalai Hills, situated on the Southern Eastern Ghats of Tamil Nadu, were explored for mosses (bryophyta) for the first time. As a result a checklist of mosses has been prepared comprising 52 species belonging to 38 genera and 21 families. The dominant families with the maximum number of species are Pottiaceae, Bryaceae, Stereophyllaceae, Sematophyllaceae and Brachytheciaceae. The dominant genera are Brachymenium and Bryum and the dominant species are Barbula javanica and Bryum capillare

Indirect electrochemical oxidation of o-chloro toluene to 0-chloro benzaldehyde using ceric methane sulphonate

O-chloro benzaldehyde finds wide applications as chemical intermediates, pharmaceuticals, optical brighteners etc. It is nomlally produced by acid hydrolysis, but the process generates chlorinated by-products and has poor selectivity. Indirect electrochemical oxidation of o-chloro toluene using ceric mediators otTers a facile and clean route for the production of the aldehyde. In this paper results are reported for the oxidation of o-chloro toluene to o-chloro benzaldehyde using eerie methane sulphonate followed by electrochemical regeneration of eerie from cerous thereby making the process cyclic. 60-70% selectivities have been achieved for the chemical oxidation of o· chloro toluene to o-ehloro benzaldehyde while the electrochemical regeneration of eerie from cerous proceeds with 70-80% current efficiencies

Synthesis, characterization and reactivity ratios of co-polymers derived from 4-nitrophenyl methacrylate and butyl methacrylate

288-292Poly (NPNA) has been synthesized from 4-nitrophenylmethacrylate (NPMA) in 2-butanone using BPO as a free radical initiator. Copolymers of NPMA and BMA [poly(NPMA-co-BMA)] have also likewise been obtained. The polymers have been characterized by IR, 1H NMR and 13C NMR spectral studies. The weight average molecular weights of the polymers lie in the range (4.1-5 .2) ×104 while the number average molecular weights are found to be in the range (2-2.8) ×104. The monomer reactivity ratios for NPMA-BMA copolymers and Q-e values for NPMA have been determined. TG and DSC studies indicate a random arrangement for the copolymers with thermal decomposition occurring in two stages

Using Graph Theory Concepts to Determine Boiling Point Formulae for Choloalkanes

Abstract—The applications of graph theory are not restricted only to mathematics. Graph theory and mathematical modeling can be combined to study various chemical phenomena like characterization and identification of chemical compounds. Given a chemical substance and some of its properties a chemist would like to be able to determine whether the substance is a known compound or not. Properties of substances depend not only on their chemical composition but also on the shape of the molecules. Index Terms — Graph theory, chemical property, structure, boiling point