Vol. 117 No. 4 October-December 1988
National Science and Technology authority
Dr. Antonio Arizabal
Secretary
The Philippine Journal of Science
Advisory Board
Dr. Leland S. Villadolid
Dr. Quintin L. Kintanar
Dr. Rafael D. Querrero III
Dr. Ricardo M. Lantican
Engr. Benjamin T. Damian
Dr. Rogelio A. Panlasigue
Exucitive Editor
Dr. Perfecto K. Guerrero
Contributing Editors
Engr. Benjamin T. Damian
Dr. Roman L. Kintanar
Dr. Rufino C. Lirag
Dr. Rodolfo F. Florentino
Dr. Constante V. Ventura
Dr. Raymundo S. Punongbayan
Dr. Quirino O. Nvarro
Dr. Irene D. Amores
Dr. Florentino O. Tesoro
Dr. Eduardo P. Villanueva
Dr. Paulo C. Campos
Editorial Staff
Publications Director:Dr. Irene D. Amores
Publications Co-Director:Prof. Manuel P. Garcia, Jr.
Publication Supervisor:Mr. Redocindo L. Santillan
Associate Director:Ms. Victoria B. Bartilet
:Ms. Cymbeline R. Villamin
Managing Editor:Ms. Charity M. Bolos
Circulation Assistants:Ms. Mona Carina E. Montevirgen
:Mr. Elizalde D. Aguirre
Publication Assistant:Mr. Salvador B. Belen
Financial Assistants:Ms. Lourdes V. Biescas
:Mr. Abilio P. Gillego
Vol. 117 No. 3 July-September 1988
National Science and Technology authority
Dr. Antonio Arizabal
Secretary
The Philippine Journal of Science
Advisory Board
Dr. Leland S. Villadolid
Dr. Quintin L. Kintanar
Dr. Rafael D. Querrero III
Dr. Ricardo M. Lantican
Engr. Benjamin T. Damian
Dr. Rogelio A. Panlasigue
Exucitive Editor
Dr. Perfecto K. Guerrero
Contributing Editors
Engr. Benjamin T. Damian
Dr. Roman L. Kintanar
Dr. Rufino C. Lirag
Dr. Rodolfo F. Florentino
Dr. Constante V. Ventura
Dr. Raymundo S. Punongbayan
Dr. Quirino O. Nvarro
Dr. Irene D. Amores
Dr. Florentino O. Tesoro
Dr. Eduardo P. Villanueva
Dr. Paulo C. Campos
Editorial Staff
Publications Director:Dr. Irene D. Amores
Publications Co-Director:Prof. Manuel P. Garcia, Jr.
Publication Supervisor:Mr. Redocindo L. Santillan
Associate Director:Ms. Victoria B. Bartilet
:Ms. Cymbeline R. Villamin
Managing Editor:Ms. Charity M. Bolos
Circulation Assistants:Ms. Mona Carina E. Montevirgen
:Mr. Elizalde D. Aguirre
Publication Assistant:Mr. Salvador B. Belen
Financial Assistants:Ms. Lourdes V. Biescas
:Mr. Abilio P. Gillego
Vol. 117 No. 2 April-June 1988
National Science and Technology authority
Dr. Antonio Arizabal
Secretary
The Philippine Journal of Science
Advisory Board
Dr. Leland S. Villadolid
Dr. Quintin L. Kintanar
Dr. Rafael D. Querrero III
Dr. Ricardo M. Lantican
Engr. Benjamin T. Damian
Dr. Rogelio A. Panlasigue
Exucitive Editor
Dr. Perfecto K. Guerrero
Contributing Editors
Engr. Benjamin T. Damian
Dr. Roman L. Kintanar
Dr. Rufino C. Lirag
Dr. Rodolfo F. Florentino
Dr. Constante V. Ventura
Dr. Raymundo S. Punongbayan
Dr. Quirino O. Nvarro
Dr. Irene D. Amores
Dr. Florentino O. Tesoro
Dr. Eduardo P. Villanueva
Dr. Paulo C. Campos
Editorial Staff
Publications Director:Dr. Irene D. Amores
Publications Co-Director:Prof. Manuel P. Garcia, Jr.
Publication Supervisor:Mr. Redocindo L. Santillan
Associate Director:Ms. Victoria B. Bartilet
:Ms. Cymbeline R. Villamin
Managing Editor:Ms. Charity M. Bolos
Circulation Assistants:Ms. Mona Carina E. Montevirgen
:Mr. Elizalde D. Aguirre
Publication Assistant:Mr. Salvador B. Belen
Financial Assistants:Ms. Lourdes V. Biescas
:Mr. Abilio P. Gillego
Vol. 117 No. 1 Jan-March 1988
National Science and Technology authority
Dr. Antonio Arizabal
Secretary
The Philippine Journal of Science
Advisory Board
Dr. Leland S. Villadolid
Dr. Quintin L. Kintanar
Dr. Rafael D. Querrero III
Dr. Ricardo M. Lantican
Engr. Benjamin T. Damian
Dr. Rogelio A. Panlasigue
Exucitive Editor
Dr. Perfecto K. Guerrero
Contributing Editors
Engr. Benjamin T. Damian
Dr. Roman L. Kintanar
Dr. Rufino C. Lirag
Dr. Rodolfo F. Florentino
Dr. Constante V. Ventura
Dr. Raymundo S. Punongbayan
Dr. Quirino O. Nvarro
Dr. Irene D. Amores
Dr. Florentino O. Tesoro
Dr. Eduardo P. Villanueva
Dr. Paulo C. Campos
Editorial Staff
Publications Director:Dr. Irene D. Amores
Publications Co-Director:Prof. Manuel P. Garcia, Jr.
Publication Supervisor:Mr. Redocindo L. Santillan
Associate Director:Ms. Victoria B. Bartilet
:Ms. Cymbeline R. Villamin
Managing Editor:Ms. Charity M. Bolos
Circulation Assistants:Ms. Mona Carina E. Montevirgen
:Mr. Elizalde D. Aguirre
Publication Assistant:Mr. Salvador B. Belen
Financial Assistants:Ms. Lourdes V. Biescas
:Mr. Abilio P. Gillego
Vol. 116 No. 4 October-December 1987
National Science and Technology authority
Antonio Arizabal,Secretary
The Philippine Journal of Science
Published by the Industrial Technology Development Institute
(formerly National Institute of Science and Technology)
and the Department of Science and Technology
(formerly National Science and Technology Authority)
Advisory Board
Emil Q. Javier Ph. D.
Roger R. Posadas, Ph.D.
Alfredo C. Santos, Ph.D.
Miguel M. Varela, S.J., Ph.D.
Jose R. Velasco, Ph.D.
Gregorio T. Velasquez, Ph.D.
Rufino C. Lirag, Jr., Ph.D.
Editor
Quintin L. Kintanar, M.D., Ph.D.
Consultant
Ileana. F. Cruz, A.M.
Associate Editors
Irma R. Castro, M.S.
Minda Flor T. Brandares, B.S.Pharm.
Managing Editor
Jasmin G. Deverala, B.S. Pharm.
Publication AssistantCirculation Assistant
Angelito C. De Guzman, B.S.C. Josephine B. King, B.S.C.
Contributing Editors
Manuel R. Euginio, Ph.D.
Rodolfo F. Florentino, Ph.D.
Jose L. Guerrero Ph. D.
Roman L. Kintanar, Ph.D.
Raymundo S. Punongbayan, Ph.D.
Florentino O. Tesoro, Ph.D
[Entered at the post office at Manila, Philippines, as second-class matter.]
Vol. 116 No. 3 July-September 1987
National Science and Technology authority
Antonio Arizabal,Director General
Quintin L. Kintanar, Deputy Director General
The Philippine Journal of Science
Published by the Industrial Technology Development Institute
(formerly National Institute of Science and Technology)
and the Department of Science and Technology
(formerly National Science and Technology Authority)
Advisory Board
Emil Q. Javier Ph. D.
Roger R. Posadas, Ph.D.
Alfredo C. Santos, Ph.D.
Miguel M. Varela, S.J., Ph.D.
Jose R. Velasco, Ph.D.
Gregorio T. Velasquez, Ph.D.
Rufino C. Lirag, Jr., Ph.D.
Editor
Quintin L. Kintanar, M.D., Ph.D.
Consultant
Ileana. F. Cruz, A.M.
Associate Editors
Irma R. Castro, M.S.
Minda Flor T. Brandares, B.S.Pharm.
Managing Editor
Jasmin G. Deverala, B.S. Pharm.
Publication AssistantCirculation Assistant
Angelito C. De Guzman, B.S.C. Josephine B. King, B.S.C.
Contributing Editors
Manuel R. Euginio, Ph.D.
Rodolfo F. Florentino, Ph.D.
Jose L. Guerrero Ph. D.
Roman L. Kintanar, Ph.D.
Raymundo S. Punongbayan, Ph.D.
Florentino O. Tesoro, Ph.D
[Entered at the post office at Manila, Philippines, as second-class matter.]
Vol. 116 No. 2 April-June 1987
National Science and Technology authority
Antonio Arizabal,Director General
Quintin L. Kintanar, Deputy Director General
The Philippine Journal of Science
Published by the Industrial Technology Development Institute
(formerly National Institute of Science and Technology)
and the Department of Science and Technology
(formerly National Science and Technology Authority)
Member
Emil Q. Javier Ph. D.
Roger R. Posadas, Ph.D.
Alfredo C. Santos, Ph.D.
Miguel M. Varela, S.J., Ph.D.
Jose R. Velasco, Ph.D.
Gregorio T. Velasquez, Ph.D.
Rufino C. Lirag, Jr., Ph.D.
Editor
Quintin L. Kintanar, M.D., Ph.D.
Consultant
Ileana. F. Cruz, A.M.
Associate Editors
Irma R. Castro, M.S. Bot.
Minda Flor T. Brandares, B.S.Pharm.
Managing Editor
Jasmin G. Deverala, B.S. Pharm.
Publication AssistantCirculation Assistant
Angelito C. De Guzman, B.S.C. Josephine B. King, B.S.C.
Contributing Editors
Manuel R. Euginio, Ph.D.
Rodolfo F. Florentino, Ph.D.
Jose L. Guerrero Ph. D.
Roman L. Kintanar, Ph.D.
Raymundo S. Punongbayan, Ph.D.
Florentino O. Tesoro, Ph.D
[Entered at the post office at Manila, Philippines, as second-class matter.]
Vol. 116 No. 1 January-March 1987
National Science and Technology authority
Antonio Arizabal,Director General
Quintin L. Kintanar, Deputy Director General
The Philippine Journal of Science
NSDB-NIST Project No. 7308-OT, founded by the national Science
Development Board, and Published quarterly by the Philippine Journal of Science
P.O. Box 774, Manila, Philippines
Advisory Board
Antonio Arizabal, M.D., Ph.D.
Chairman
Emil Q. Javier Ph. D.
Roger R. Posadas, Ph.D.
Alfredo C. Santos, Ph.D.
Miguel M. Varela, S.J., Ph.D.
Jose R. Velasco, Ph.D.
Gregorio T. Velasquez, Ph.D.
Rufino C. Lirag, Jr., Ph.D.
Editor
Quintin L. Kintanar, M.D., Ph.D.
Consultant
Ileana. F. Cruz, A.M.
Associate Editors
Irma R. Castro, M.S. Bot.
Minda Flor T. Brandares, B.S.Pharm.
Managing Editor
Jasmin G. Deverala, B.S. Pharm.
Publication AssistantCirculation Assistant
Angelito C. De Guzman, B.S.C. Josephine B. King, B.S.C.
Contributing Editors
Manuel R. Euginio, Ph.D.
Rodolfo F. Florentino, Ph.D.
Jose L. Guerrero Ph. D.
Roman L. Kintanar, Ph.D.
Raymundo S. Punongbayan, Ph.D.
Florentino O. Tesoro, Ph.D
[Entered at the post office at Manila, Philippines, as second-class matter.]
Vol. 115 No. 4 October-December 1986
National Science and Technology authority
Antonio Arizabal,Director General
Quintin L. Kintanar, Deputy Director General
The Philippine Journal of Science
NSDB-NIST Project No. 7308-OT, founded by the national Science
Development Board, and Published quarterly by the Philippine Journal of Science
P.O. Box 774, Manila, Philippines
Advisory Board
Antonio Arizabal, M.D., Ph.D.
Chairman
Emil Q. Javier Ph. D.
Roger R. Posadas, Ph.D.
Alfredo C. Santos, Ph.D.
Miguel M. Varela, S.J., Ph.D.
Jose R. Velasco, Ph.D.
Gregorio T. Velasquez, Ph.D.
Editor
Quintin L. Kintanar, M.D., Ph.D.
Consultant
Ileana. F. Cruz, A.M.
Associate Editors
Irma R. Castro, M.S. Bot.
Minda Flor T. Brandares, B.S.Pharm.
Managing Editor
Jasmin G. Deverala, B.S. Pha
Publication AssistantCirculation Assistant
Angelito C. De Guzman, B.S.C. Josephine B. King, B.S.C.
Contributing Editors
Manuel R. Euginio, Ph.D.
Rodolfo F. Florentino, Ph.D.
Jose L. Guerrero Ph. D.
Roman L. Kintanar, Ph.D.
Manaloto G. Natera, Ph.D.
Raymundo S. Punongbayan, Ph.D.
Florentino O. Tesoro, Ph.D.
[Entered at the post office at Manila, Philippines, as second-class matter.
Vol. 115 No. 3 July-September 1986
National Science and Technology authority
Antonio Arizabal,Director General
Quintin L. Kintanar, Deputy Director General
The Philippine Journal of Science
NSDB-NIST Project No. 7308-OT, founded by the national Science
Development Board, and Published quarterly by the Philippine Journal of Science
P.O. Box 774, Manila, Philippines
Advisory Board
Emil Q. Javier Ph.D.
Chairman
Roger R. Posadas, Ph.D.
Alfredo C. Santos, Ph.D.
Filemon A. Uriarte, Jr., Ph.D.
Miguel M. Varela, S.J., Ph.D.
Jose R. Velasco, Ph.D.
Gregorio T. Velasquez, Ph.D.
Editor
Quintin L. Kintanar, M.D., Ph.D.
Consultant
Ileana. F. Cruz, A.M.
Associate Editors
Irma R. Castro, M.S. Bot.
Minda Flor T. Brandares, B.S.Pharm.
Managing Editor
Jasmin G. Deverala, B.S. Pha
Publication AssistantCirculation Assistant
Angelito C. De Guzman, B.S.C. Josephine B. King, B.S.C.
Contributing Editors
Manuel R. Euginio, Ph.D.
Rodolfo F. Florentino, Ph.D.
Jose L. Guerrero Ph. D.
Roman L. Kintanar, Ph.D.
Manaloto G. Natera, Ph.D.
Raymundo S. Punongbayan, Ph.D.
Florentino O. Tesoro, Ph.D
.
[Entered at the post office at Manila, Philippines, as second-class matter.]
Vol. 115 No. 2 April-June 1986
National Science and Technology authority
Dr. Emil Q. Javier,Director General
Quintin L. Kintanar, Deputy Director General
The Philippine Journal of Science
NSDB-NIST Project No. 7308-OT, founded by the national Science
Development Board, and Published quarterly by the Philippine Journal of Science
P.O. Box 774, Manila, Philippines
Advisory Board
Emil Q. Javier Ph.D.
Chairman
Roger R. Posadas, Ph.D.
Alfredo C. Santos, Ph.D.
Filemon A. Uriarte, Jr., Ph.D.
Miguel M. Varela, S.J., Ph.D.
Jose R. Velasco, Ph.D.
Gregorio T. Velasquez, Ph.D.
Editor
Quintin L. Kintanar, M.D., Ph.D.
Consultant
Ileana. F. Cruz, A.M.
Associate Editors
Irma R. Castro, M.S. Bot.
Minda Flor T. Brandares, B.S.Pharm.
Managing Editor
Jasmin G. Deverala, B.S. Pha
Publication AssistantCirculation Assistant
Angelito C. De Guzman, B.S.C. Josephine B. King, B.S.C.
Contributing Editors
Manuel R. Euginio, Ph.D.
Rodolfo F. Florentino, Ph.D.
Jose L. Guerrero Ph. D.
Roman L. Kintanar, Ph.D.
Manaloto G. Natera, Ph.D.
Raymundo S. Punongbayan, Ph.D.
Florentino O. Tesoro, Ph.D.
[Entered at the post office at Manila, Philippines, as second-class matter.]
Vol. 115 No. 1 January-March 1986
National Science and Technology authority
Dr. Emil Q. Javier,Director General
Quintin L. Kintanar, Deputy Director General
The Philippine Journal of Science
NSDB-NIST Project No. 7308-OT, founded by the national Science
Development Board, and Published quarterly by the Philippine Journal of Science
P.O. Box 774, Manila, Philippines
Advisory Board
Emil Q. Javier Ph.D.
Chairman
Roger R. Posadas, Ph.D.
Alfredo C. Santos, Ph.D.
Filemon A. Uriarte, Jr., Ph.D.
Miguel M. Varela, S.J., Ph.D.
Jose R. Velasco, Ph.D.
Gregorio T. Velasquez, Ph.D.
Editor
Quintin L. Kintanar, M.D., Ph.D.
Consultant
Ileana. F. Cruz, A.M.
Associate Editors
Irma R. Castro, M.S. Bot.
Minda Flor T. Brandares, B.S.Pharm.
Managing Editor
Jasmin G. Deverala, B.S. Pha
Publication AssistantCirculation Assistant
Angelito C. De Guzman, B.S.C. Josephine B. King, B.S.C.
Contributing Editors
Manuel R. Euginio, Ph.D.
Rodolfo F. Florentino, Ph.D.
Jose L. Guerrero Ph. D.
Roman L. Kintanar, Ph.D.
Manaloto G. Natera, Ph.D.
Raymundo S. Punongbayan, Ph.D.
Florentino O. Tesoro, Ph.D.
[Entered at the post office at Manila, Philippines, as second-class matter.]
Vol. 114 No. 3-4 July-December 1985
National Science and Technology authority
Dr. Emil Q. Javier,Director General
Quintin L. Kintanar, Deputy Director General
The Philippine Journal of Science
NSDB-NIST Project No. 7308-OT, founded by the national Science
Development Board, and Published quarterly by the Philippine Journal of Science
P.O. Box 774, Manila, Philippines
Advisory Board
Emil Q. Javier Ph.D.
Chairman
Roger R. Posadas, Ph.D.
Alfredo C. Santos, Ph.D.
Filemon A. Uriarte, Jr., Ph.D.
Miguel M. Varela, S.J., Ph.D.
Jose R. Velasco, Ph.D.
Gregorio T. Velasquez, Ph.D.
Editor
Quintin L. Kintanar, M.D., Ph.D.
Consultant
Ileana. F. Cruz, A.M.
Associate Editors
Irma R. Castro, M.S. Bot.
Minda Flor T. Brandares, B.S.Pharm.
Managing Editor
Jasmin G. Deverala, B.S. Pha
Publication AssistantCirculation Assistant
Angelito C. De Guzman, B.S.C. Josephine B. King, B.S.C.
Contributing Editors
Manuel R. Euginio, Ph.D.
Rodolfo F. Florentino, Ph.D.
Jose L. Guerrero Ph. D.
Roman L. Kintanar, Ph.D.
Manaloto G. Natera, Ph.D.
Raymundo S. Punongbayan, Ph.D.
Florentino O. Tesoro, Ph.D.
[Entered at the post office at Manila, Philippines, as second-class matter.]
Vol. 114 No. 1-2 Jan-June 1985
National Science and Technology authority
Dr. Emil Q. Javier,Director General
Quintin L. Kintanar, Deputy Director General
The Philippine Journal of Science
NSDB-NIST Project No. 7308-OT, founded by the national Science
Development Board, and Published quarterly by the Philippine Journal of Science
P.O. Box 774, Manila, Philippines
Advisory Board
Emil Q. Javier Ph.D.
Chairman
Roger R. Posadas, Ph.D.
Alfredo C. Santos, Ph.D.
Filemon A. Uriarte, Jr., Ph.D.
Miguel M. Varela, S.J., Ph.D.
Jose R. Velasco, Ph.D.
Gregorio T. Velasquez, Ph.D.
Editor
Quintin L. Kintanar, M.D., Ph.D.
Consultant
Ileana. F. Cruz, A.M.
Associate Editors
Irma R. Castro, M.S. Bot.
Minda Flor T. Brandares, B.S.Pharm.
Managing Editor
Jasmin G. Deverala, B.S. Pha
Publication AssistantCirculation Assistant
Angelito C. De Guzman, B.S.C. Josephine B. King, B.S.C.
Contributing Editors
Manuel R. Euginio, Ph.D.
Rodolfo F. Florentino, Ph.D.
Jose L. Guerrero Ph. D.
Roman L. Kintanar, Ph.D.
Manaloto G. Natera, Ph.D.
Raymundo S. Punongbayan, Ph.D.
Florentino O. Tesoro, Ph.D.
[Entered at the post office at Manila, Philippines, as second-class matter.]
Vol. 113 No. 3-4 July-December 1984
National Science and Technology authority
Dr. Emil Q. Javier,Director General
Quintin L. Kintanar, Deputy Director General
The Philippine Journal of Science
NSDB-NIST Project No. 7308-OT, founded by the national Science
Development Board, and Published quarterly by the Philippine Journal of Science
P.O. Box 774, Manila, Philippines
Advisory Board
Emil Q. Javier Ph.D.
Roger R. Posadas, Ph.D.
Alfredo C. Santos, Ph.D.
Gregorio T. Velasquez, Ph.D.
Fr. Miguel M. Valera, S.J. Ph.D.
Editor
Quintin L. Kintanar, M.D., Ph.D.
Associate Editors
Irma R. Castro, M.S. Bot.
Minda Flor T. Brandares, B.S.Pharm.
Managing EditorCirculation Assistant
Jasmin G. Deverala, B.S. PhaJosephine B. King, B.S.C.
Editorial Consultant
Ileana R.F. Cruz, A.M.
Contributing Editors
Filemon A. Uriarte, Jr., Ph.D.
Florentino O. Tesoro, Ph.D.
Manolito G. Natera, Ph.D.
Raymundo S. Punongbayan, Ph.D.
Rodolfo F. Florentino, Ph.D.
Jose L. Guerrero Ph. D.
[Entered at the post office at Manila, Philippines, as second-class matter.]
Vol. 113 No. 1-2 Jan-June 1984
National Science and Technology authority
Dr. Emil Q. Javier,Director General
Quintin L. Kintanar, Deputy Director General
The Philippine Journal of Science
NSDB-NIST Project No. 7308-OT, founded by the national Science
Development Board, and Published quarterly by the Philippine Journal of Science
P.O. Box 774, Manila, Philippines
Advisory Board
Emil Q. Javier Ph.D.
Roger R. Posadas, Ph.D.
Alfredo C. Santos, Ph.D.
Gregorio T. Velasquez, Ph.D.
Fr. Miguel M. Valera, S.J. Ph.D.
Editor
Quintin L. Kintanar, M.D., Ph.D.
Associate Editors
Irma R. Castro, M.S. Bot.
Minda Flor T. Brandares, B.S.Pharm.
Managing EditorCirculation Assistant
Jasmin G. Deverala, B.S. PhaJosephine B. King, B.S.C.
Editorial Consultant
Ileana R.F. Cruz, A.M.
Contributing Editors
Filemon A. Uriarte, Jr., Ph.D.
Florentino O. Tesoro, Ph.D.
Manolito G. Natera, Ph.D.
Raymundo S. Punongbayan, Ph.D.
Rodolfo F. Florentino, Ph.D.
Jose L. Guerrero Ph. D.
[Entered at the post office at Manila, Philippines, as second-class matter.]
Vol. 112 No. 3-4 July-December 1983
National Science and Technology authority
Dr. Emil Q. Javier,Director General
Quintin L. Kintanar, Deputy Director General
The Philippine Journal of Science
NSDB-NIST Project No. 7308-OT, founded by the national Science
Development Board, and Published quarterly by the Philippine Journal of Science
P.O. Box 774, Manila, Philippines
Advisory Board
Emil Q. Javier Ph.D.
Roger R. Posadas, Ph.D.
Alfredo C. Santos, Ph.D.
Gregorio T. Velasquez, Ph.D.
Fr. Miguel M. Valera, S.J. Ph.D.
Editor
Quintin L. Kintanar, M.D., Ph.D.
Associate Editors
Irma R. Castro, M.S. Bot.
Minda Flor T. Brandares, B.S.Pharm.
Managing EditorCirculation Assistant
Jasmin G. Deverala, B.S. PhaJosephine B. King, B.S.C.
Editorial Consultant
Ileana R.F. Cruz, A.M.
Contributing Editors
Filemon A. Uriarte, Jr. Ph.D.
Florentino O. Tesoro, Ph.D.
Manolito G. Natera, Ph.D.
Raymundo S. Punongbayan, Ph.D.
Rodolfo F. Florentino, Ph.D.
Jose L. Guerrero Ph. D.
[Entered at the post office at Manila, Philippines, as second-class matter.]
Vol. 112 No. 1-2 Jan-June 1983
National Science and Technology authority
Dr. Emil Q. Javier,Director General
Quintin L. Kintanar, Deputy Director General
The Philippine Journal of Science
NSDB-NIST Project No. 7308-OT, founded by the national Science
Development Board, and Published quarterly by the Philippine Journal of Science
P.O. Box 774, Manila, Philippines
Advisory Board
Emil Q. Javier Ph.D.
Roger R. Posadas, Ph.D.
Alfredo C. Santos, Ph.D.
Gregorio T. Velasquez, Ph.D.
Fr. Miguel M. Valera, S.J. Ph.D.
Editor
Quintin L. Kintanar, M.D., Ph.D.
Associate Editors
Irma R. Castro, M.S. Bot.
Minda Flor T. Brandares, B.S.Pha.
Managing EditorCirculation Assistant
Jasmin G. Deverala, B.S. PhaJosephine B. King, B.S.C.
Editorial Consultant
Ileana R.F. Cruz, A.M.
Contributing Editors
Lydia M. Joson Dok. Agrik.
Florentino O. Tesoro, Ph.D.
Manolito G. Natera, Ph.D.
Raymundo S. Punongbayan, Ph.D.
Rodolfo F. Florentino, Ph.D.
Jose L. Guerrero Ph. D.
\
[Entered at the post office at Manila, Philippines, as second-class matter.]
Vol. 111 No. 1-2 Jan-June 1982
National Science Development Board
Board of Governors
Dr. Emil Q. Javier,Chairman
Members
Onofre D. Corpus, Edgardo Angara
Roberto V. Ongpin, Geronimo Z. Velasco, Placido Mapa Jr.
Agencies of the Board
National Institute of Science and Technology
Vedasto R. Jose
Commisioner
Forest Products Research and Industries Development Commission
Rodrigo Valbuena
Commissioner
Philippine Inventors Commision
Fidelino Adriano
Officer-in-charge
Food Nutrition Research Center Institute
Josefina Bulatao-Jayme
Officer-in-charge
Philippine Textile Research Institute
Eduardo P. Villanueva
Director
Commission on Volcanology
Olimpio Peña
Acting Commissioner
The Philippine Journal of Science
NSDB-NIST Project No. 7308-OT, founded by the national Science
Development Board, and Published quarterly by the Philippine Journal of Science
P.O. Box 774, Manila, Philippines
[Entered at the post office at Manila, Philippines, as second-class matter.]
Vedasto R. Jose
Editor
Jose R. Velasco Ph.D.
Consultant
Jasmin G. Deverala
Publication & Circulation
Josephine B. King
Journal Secretary
Vol. 110 No. 3-4 July-December 1981
National Science Development Board
Board of Governors
Dr. Emil Q. Javier,Chairman
Members
Onofre D. Corpus, Edgardo Angara
Roberto V. Ongpin, Geronimo Z. Velasco, Placido Mapa Jr.
Agencies of the Board
National Institute of Science and Technology
Vedasto R. Jose
Commisioner
Forest Products Research and Industries Development Commission
Rodrigo Valbuena
Commissioner
Philippine Inventors Commision
Fidelino Adriano
Officer-in-charge
Food Nutrition Research Center Institute
Josefina Bulatao-Jayme
Officer-in-charge
Philippine Textile Research Institute
Eduardo P. Villanueva
Director
Commission on Volcanology
Olimpio Peña
Acting Commissioner
The Philippine Journal of Science
NSDB-NIST Project No. 7308-OT, founded by the national Science
Development Board, and Published quarterly by the Philippine Journal of Science
P.O. Box 774, Manila, Philippines
[Entered at the post office at Manila, Philippines, as second-class matter.]
Vedasto R. Jose
Editor
Jasmin G. DeveralaJosephine B. King
Managing EditorCirculation Assistant
Associate Editors
Irma R. Castro
Mindaflor T. Brandares
Consultant
Joser R. Velasco, Ph.D.
Vol. 110 No. 1-2 Jan-June 1981
National Science Development Board
Board of Governors
Dr. Emil Q. Javier,Chairman
Members
Onofre D. Corpus, Edgardo Angara
Roberto V. Ongpin, Geronimo Z. Velasco, Placido Mapa Jr.
Agencies of the Board
National Institute of Science and Technology
Vedasto R. Jose
Commisioner
Forest Products Research and Industries Development Commission
Rodrigo Valbuena
Commissioner
Philippine Inventors Commision
Fidelino Adriano
Officer-in-charge
Food Nutrition Research Center Institute