PAKISTAN ACADEMY OF SCIENCES

CONTENTS:
Proceedings of the Pakistan Academy of Sciences since 1997
[Vol. 34, No. 1, 1997] [Vol. 34, No. 2, 1997] [Vol. 35, No. 1, 1998] [Vol. 35, No. 2, 1998] [Vol. 36, No. 1, 1999] [Vol. 36, No. 2, 1999] [Vol. 37, No. 1, 2000] [Vol. 37, No. 2, 2000] [Vol. 38, No. 1, June 2001] [Vol. 38, No. 2, Dec 2001] [Vol. 39, No. 1, June 2002] [Vol. 39, No. 2, Dec 2002] [Vol. 40, No. 1, June 2003]
[Other Publications] [Online Journals]
[Instructions to Authors]

OFFICIAL JOURNAL OF THE ACADEMY
HEC Recognized, Category X

PROCEEDINGS OF THE PAKISTAN ACADEMY OF SCIENCES, published since 1964, is quarterly journal of the Academy. It publishes original research papers and reviews in basic and applied sciences. All papers are refereed externally. Authors are not required to be Fellows or Members of the Academy, or citizens of Pakistan.

The journal is covered by ISSN and is distributed to international scientific organizations and universities by subscription and on exchange basis. It is abstracted in Biological Abstracts, Physical Sciences Abstracts, Chemical Sciences Abstracts and Mathematical Reviews. Manuscripts must be communicated to Editor-in-Chief (pas.editor@gmail.com).

The affairs of the Proceedings are managed by the Editor-in-Chief, with the guidance and support of Discipline Editors and Local and International Advisory Boards. All correspondence and inquiries about the journal are received/handled by the Editor-in-Chief.

EDITOR-IN-CHIEF Dr. Abdul Rashid Pakistan Academy of Sciences 3-Constition Avenue, G-5/2, Islamabad, Pakistan Phone: (92-51) 9207140, Cell: (92-308) 520 3032, Fax: (92-51) 9206770 E-mail: pas.editor@gmail.com Website: www.paspk.org
EDITORS
*Engineering Sciences & Technology* Prof. Dr. Abdul Raouf, _S.I. 36-P, Model Town Extension Lahore, Pakistan E-mail: abdulraouf@umt.edu.pk	*Life Sciences* Prof. Dr. Kauser A. Malik, _{H.I., S.I.,T.I.} Forman Christian College Ferozepur Road, Lahore E-mail: kauser45@gmail.com
*Medical Sciences* Prof. Dr. M. Salim Akhtar, _S.I. 725, Shadman House Shadman Colony I Lahore – 54000 E-mail: msakhter47@yahoo.com	*Physical Sciences* Prof. Dr. M. Aslam Baig, _{H.I., S.I.,T.I.} Department of Physics Quaid-i-Azam University Islamabad E-mail: baig@qau.edu.pk

EDITORIAL BOARD (under revision)
Local Advisory Board		*International Advisory Board*
1.	Prof. Dr. M. Arslan	1.	Prof. Dr. A.K. Cheetham, USA
2.	Prof. Dr. Aslam Baig	2.	Prof. Dr. P.K. Khabibullaev, Uzbekistan
3.	Dr. N.M. Butt	3.	Prof. Dr. S.N. Kharin, Kazakhstan
4.	Prof. Dr. M. Qasim Jan	4.	Prof. Dr. H.W. Korf, Germany
5.	Prof. Dr. M. Ajmal Khan	5.	Prof. Dr. Tony Plant, USA
6.	Dr. Anwar Nasim	6.	Prof. Dr. S.G. Ponnambalam, Malaysia
7.	Prof. Dr. Asghar Qadir	7.	Prof. Dr. E. Nieschlag, Germany
8.	Prof. Dr. M. Qaisar	8.	Prof. Dr. D.L.G. Noakes, Canada
9.	Prof. Dr. Riazuddin	9.	Prof. Dr. M.S. Ying, China

Current Annual Subscription
Pakistan
Institutional: Rs.2000/-
Individuals: Rs.1000/-

Other countries
US$ 100.00 (Price includes air-lifted delivery overseas)

© Copyright. Reproduction of abstracts of papers appearing in this journal is authorized provided the source is acknowledged. Permission to reproduce any other material may be obtained in writing from the Editor-in-Chief.

The articles published in the Proceedings contain data, opinion(s) and statement(s) of the authors only. The Pakistan Academy of Sciences and the editors accept no responsibility whatsoever in this regard.