inside front cover-19-2 EDITORIAL BOARD Editor-in-Chief Maricor N. Soriano, Ph.D. Associate Editors Zubaida U. Basiao, Ph.D. Biology Joel Joseph S. Marciano, Jr., Ph.D. Computer Science, Engineering Nemesio E. Montano, Ph.D. Biochemistry Rosana B. Tarriela, Ph.D. Earth Sciences Fernando P. Siringan, Ph.D. Marine Sciences Cristine D. Villagonzalo, Dr. Rer. Nat. Physics Corazon D. Villareal, Ph.D. Managing Editor Dercylis G. Mararac Editorial Assistant 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: P 300.00/year (two issues), inclusive of postage US $ 25.00/year (two issues), inclusive of postage Tel. No: (632) 981-85-00 loc. 4047 (632) 927-2567; 927-2309; 436-87-20 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 Scanning electron microscope image of GaAs nanowires at 200,000x magnification grown on gold-deposited Si (100) substrate. Image courtesy of Dr. Armando Somintac from the paper “Growth of Gold-assisted Gallium Arsenide Nanowires on Silicon Substrates via Molecular Beam Epitaxy” in this volume. EDITORIAL ADVISORS Kelvin S. Rodolfo, Ph.D. Dept. of Earth and Environmental Sciences University of Illinois, Chicago, Illinois krodolfo@uic.edu Alfonso M. Albano, Ph.D. Dept. of Physics Bryn Mawr College, Bryn Mawr, Pennsylvania aalbano@brynmawr.edu Victor C. Gavino, Ph.D. Dept. of Nutrition University of Montreal, Canada victor.gavino@umontreal.ca Raul K. Suarez, Ph.D. Dept. of Ecology, Evolution and Marine Biology University of California, Sta. Barbara suarez@lifesci.ucsb.edu