isoprene emission from tropical tree species.foliar emission of isoprene was measured in nine commonly growing tree species of delhi, india. dynamic flow enclosure technique was used and gas samples were collected onto tenax-gc/carboseive cartridges, which were then attached to the sample injection system in the gas chromatograph (gc). eluting compounds were analysed using a flame ionisation detector (fid). out of the nine tree species, isoprene emission was found in six species (eucalyptus sp., ficus benghalensis, ficus religiosa, mangife ...200515701397
personal protection from mosquitoes (diptera: culicidae) by burning neem oil in kerosene.the repellent action of neem oil (extracted from the seeds of azadirachta indica a. juss) was evaluated on mosquitoes at two villages near delhi, india. kerosene lamps containing neem oil were burned in the living rooms, and mosquitoes resting walls or attracted to human bait were collected inside rooms from 1800 to 0600 h. neem oil (0.01-1%) mixed in kerosene reduced biting of human volunteers and catches of mosquitoes resting on walls in the rooms. protection was more pronounced against anophe ...19947914543
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