N. Adityachaudhury

Photodegradation of fenarimol

The photodegradation of aqueous alcoholic solutions of fenarimol at λ ≥ 250 nm has been examined. UV irradiation of an aqueous methanolic solution for 24 h yielded two photoproducts, identified as 2,4′-dichlorobenzil and p-chlorobenzoic acid, while irradiation of a solution in aqueous isopropanol yielded p-chlorobenzoic acid and two additional products identified as 2,4′-dichlorobenzophenone and o-chlorobenzoic acid. A mechanism for the formation of the photoproducts is suggested. © 2000 Society of Chemical Industry

Candidone, a flavanone from Tephrosia candida

Abstract Candidone, ovalichalcone and dehydrorotenone have been isolated and identified from the stems and leaves of Tephrosia candida .

Glabone, a new furanoflavone from Pongamia glabra

Abstract A new furanoflavone, glabone, has been isolated and identified as 4′-methoxy-6,7-furanoflavone from the flowers of Pongamia glabra .

Dehydrodihydrorotenone and flemichapparin-B in Tephrosia candida

Abstract Dehydrodihydrorotenone and flemichapparin-B (dehydropterocarpin) have been isolated and identified from the stems and leaves ofTephrosia candida

Isoaurmillone, an isoflavone from the pods of Milletia auriculata

Abstract The pods of Milletia auriculata have yielded a new substance, 5,7-dihydroxy-6-methoxy-4′- O -prenyloxyisoflavone.

Studies on the residual fate and dissipation of malathion, methylparathion and quinalphos in paddy under West Bengal climatic condition

Abstract A field experiment was conducted with three organophos‐phorous insecticides viz. malathion, methylparathion and quinalphos in paddy in order to recommend their waiting periods for safe consumption of paddy straw and grain under West Bengal agroclimatic condition. The present study revealed that no residue could be detected in harvested paddy straw and grain and half life values as calculated, ranged from 3.46–5.20 days in soil, 1.1–1.7 days in leaves and 1.7–2.5 days in grain irrespective of treatments.