inside front cover-19-2


EDITORIAL BOARD

Editor-in-Chief
Maricor N. Soriano, PhD.

Associate Editors
Mario A. Aurelio, PhD.
Earth Sciences

Jose Maria P. Balmaceda, PhD.
Mathematics

Zubaida U. Basiao, PhD.
Biology

Joel Joseph S. Marciano, Jr., PhD.
Computer Science, Engineering

Marco Nemesio E. Montaño, PhD.
Biochemistry

Irene M. Villaseñor, PhD.
Chemistry

Corazon D. Villareal, PhD.
Managing Editor

Dercylis G. Mararac
Editorial Assistant

EDITORIAL ADVISORS

Rigoberto C. Advincula, PhD
Dept. of Chemistry
University of Houston
radvincula@uh.edu

Alfonso M. Albano, PhD.
Dept. of Physics
Bryn Mawr College, Bryn Mawr, Pennsylvania
aalbano@brynmawr.edu

Jose B. Cruz, PhD.
Dept. of Electrical and Computer Engineering
Ohio State University
cruz@ece.osu.edu.

Victor C. Gavino, PhD.
Dept. of Nutrition
University of Montreal, Canada
victor.gavino@umontreal.ca

SCIENCE DILIMAN (ISSN 0115-7809) is published bi-annually by the
Research Dissemination and Utilization Office (RDUO) of the Office of
the Vice Chancellor for Research and Development (OVCRD), University
of the Philippines Diliman. Address all communications to the Editor in
Chief, SCIENCE DILIMAN, Research Dissemination and Utilization
Office, Office of the Vice Chancellor for Research and Development,
Lower Ground Floor, Phivolcs Bldg., C. P. Garcia Ave., University of the
Philippines, Diliman, Quezon City 1101 Philippines.

Subscription Rates: P300.00/year (two issues), exclusive of postage
US$ 25.00/year (two issues), exclusive of postage

Tel. No: (632) 981-85-00 loc. 4047
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TelFax: (632) 927-2568
E-mail: rduo.ovcrd@up.edu.ph
Website: http://www.ovcrd.upd.edu.ph

SCIENCE   DILIMAN
A Journal of Pure and Applied Sciences

COVER PHOTO

Nylon shells, Paphia undulata, collected by diving along the coast Hinigaran, Negros Occidental (October 2007). Photo courtesy of
Fenelyn M. Nabuab from UP Visayas.

Contents of this journal may not be reproduced without the publisher’s written permission except for fair use, i.e., for personal,
educational and research purposes, in accordance with Copyright law. Reprinting and re-publication in any other journal or compilation is
likewise prohibited except as provided in the Copyright Agreement when the author reprints his/her article for inclusion in any publication
where he/she is the author or editor, subject to giving proper credit to the original publication of the article in the journal.

Kelvin S. Rodolfo, PhD.
Dept. of Earth and Environmental Sciences
University of Illinois, Chicago, Illinois
krodolfo@uic.edu

Rudolf A. Roemer, PhD.
Centre for Scientific Computing and Dept. of Physics
University of Warwick
r.roemer@warwick.ac.uk

Luis G. Sison, PhD.
Electrical and Electronics Engineering Institute
University of the Philippines, Diliman
luis.sison@up.edu.ph

Raul K. Suarez, PhD.
Dept. of Ecology, Evolution and Marine Biology
University of California, Sta. Barbara
suarez@lifesci.ucsb.edu