Research and Development – Philippine Institute of Pure and Applied Chemistry

A vital part of PIPAC’s package of services is basic and applied research conducted independently or in cooperation with client companies.

Institute Personnel and their Research Interests

- - Armando Victor M. Guidote, Jr., Ph.D.
    Research Interests:
    Organic Chemistry, Natural Products, Chemistry Education
    Click here to see the list of his publications.
  - Armando Jerome H. de Jesus, Jr., Ph.D.
    Research Interests:
    Molecular dynamics simulations, Membrane-protein interactions, Membrane protein-small molecule interactions
    Click here to see the list of his publications.
  - Ronaldo M. Fabicon, Ph.D.
    Research Interests:
    Industrial Chemistry
    Click here to see the list of his publications.
  - Crisanto M. Lopez, Dr.rer.nat
    Research Interests:
    Infection Biology, Fungal Biotechnology
    Click here to see the list of his publications.
  - Giselle Grace F. Lim-Co Yu Kang, Ph.D
    Research Interests:
    Biochemistry, Enzymes, Analytical Chemistry
    Click here to see the list of her publications.
  - Gilbert U. Yu, D.Eng
    Research Interests:
    Materials Science (Polymers and Supramolecules), Chemical Education, Development of Lab Experiment Modules
    Click here to see the list of his publications.
  - Ian Ken D. Dimzon, Ph.D
    Research Interests:
    Applied Analytical Chemistry, Mass Spectrometry, Chemical Metrology
    Click here to see the list of his publications.
  - Anna Carissa M. San Esteban, Ph.D
    Research Interests:
    Electrochemistry (corrosion, electrocatalytic processes); Coordination Chemistry (coordination polymers, metal-organic frameworks)
    Click here to see the list of her publications.

Selected Publications

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2011

Ian Ken D. Dimzon; Melodina F. Valde; Jaclyn Elizabeth R. Santos; Mark Joseph Garrovillas; Henson M. Dejarme; Jo Margarette W. Remollo; Fabian M. Dayrit

Physico-Chemical and Microbiological Parameters in the Deterioration of Virgin Coconut Oil Journal Article

In: Philippine Journal of Science, vol. 140, no. 1, pp. 89-103, 2011, ISSN: 0031-7683.

Abstract | Links | Tags: hydrolysis, microbial deterioration, oxidation, virgin coconut oil

@article{Dimzon2011,

title = {Physico-Chemical and Microbiological Parameters in the Deterioration of Virgin Coconut Oil},

author = {Ian Ken D. Dimzon and Melodina F. Valde and Jaclyn Elizabeth R. Santos and Mark Joseph Garrovillas and Henson M. Dejarme and Jo Margarette W. Remollo and Fabian M. Dayrit},

url = {https://philjournalsci.dost.gov.ph/home-1/33-vol-140-no-1-june-2011/439-physico-chemical-and-microbiological-parameters-in-the-deterioration-of-virgin-coconut-oil},

issn = {0031-7683},

year  = {2011},

date = {2011-06-01},

journal = {Philippine Journal of Science},

volume = {140},

number = {1},

pages = {89-103},

abstract = {The deterioration of virgin coconut oil (VCO) due to physico-chemical oxidation and hydrolysis and microbiological processes was studied. The physico-chemical oxidation of VCO in the air at room temperature was negligible. Oxidation of VCO was observed only in the presence of air, UV radiation, ferric ion (Fe3+), and high free fatty acid (FFA) content. Chemical hydrolysis was performed at varying moisture levels and temperatures. The rate of hydrolysis to produce FFAs was measured using 31P NMR under conditions of saturated water (0.22%) and 80°C was found to be 0.066 µmol/g-hr (expressed as lauric acid). At 0.084% moisture and 80°C, the rate of FFA formation was found to be 0.008 µmol/g-hr. The microbial decomposition of VCO was determined after four days of incubation at 37°C. At low moisture levels (<0.06%), VCO was stable to microbial decomposition. However, at higher moisture levels, there was an increase in the formation of organic acids, in particular, lactic acid, dodecanoic acid, succinic acid, acetic acid, and fumaric acid, indicating that microbial action had occurred. The most important conditions that influence the physico-chemical and microbial degradation of VCO are moisture, temperature, and the presence of microorganisms. These degradation processes can be minimized if the moisture level is maintained below 0.06%.},

keywords = {hydrolysis, microbial deterioration, oxidation, virgin coconut oil},

pubstate = {published},

tppubtype = {article}

}