Affiliation: | 1. Department of Chemistry, Kohat University of Science and Technology, Kohat, NWFP, Pakistan;2. Institute of Forestry, Tribhuvan University, Pokhara Campus, P. O. Box: 43, Pokhara, Kaski, Nepal;3. ICCS, HEJ Reserch institute of Chemistry, Karachi University, Karachi, Pakistan;4. Islamia College University, Peshawar, NWFP, Pakistan |