A study carried out by H C Agarwal, P K Mittal, K B Menon and M K K Pillai of the department of zoology, University of Delhi, published in August 1985, traced DDT residues in water, bottom sediments
Surjit S Mann, director of the Delhi-based Kala-Tex India Ltd has invented an environment-friendly textile dye by a process based on electrolyte technology. This electrolytic composition dye labelled
Scientists at the Defence Institute of Physiology and Allied Sciences dipas), New Delhi, have recently developed a gas mask containing five per cent carbon dioxide ( CO 2 ) and 95 per cent oxygen