Vol. 33 No. 1 (2022)

Research Articles

• Method Development and Validation of Gas Chromatography Methods using Nitrogen Phosphorus Detector (GC-NPD) and Isotope Dilution Triple Quadrupole Mass Spectrometry (GC-IDMS/MS) for the Determination of Chlorpyrifos in Mango

  Johanna Andrea Valdueza, Jomar Sta Ana, Alleni Junsay, Aaron Dacuya, Benilda Ebarvia

  1-8

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• Molecular Docking of Ecdysone Agonists and Limonoid Components of Calamondin Seeds to Tobacco Budworm Ecdysone Receptor

  Annabelle Abrera, Melvin Castrosanto, Joseph Anthony Hermocilla, Marlon Manalo

  9-19

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• Atomic Ontology in the Chemistry Curriculum and Implications for Optimizing Chemical Atomism in Teacher Education in Ethiopia

  Lemma Abayneh, Belachew Woldie

  20-41

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• Evaluation of Chemistry Content Knowledge and Verbal Analogical Reasoning as Potential Predictors of Teachers’ Quality of Chemistry Concept Analogies

  Stephen Bryan Asenjo

  42-63

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• Transesterification of preheated coconut oil catalyzed by Novozym® 435: potential source of biofuel

  Soma Chakraborty, Magin Benedict Ferrer

  64-76

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• Consumption of Glucosinolate-Rich Nasturtium officinale and Brassica oleracea L. var. sabellica May Reduce the Risk of Cancer Occurrence in Humans

  Raymond Malabed, Marissa Noel, Marguerita Gabrielle Cabusido, Johnica Chua, Lorenzo Gabriel Janairo, Mikaela Beatrice Sy, Glenn Oyong

  77-90

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• Microwave-assisted Extraction of Pectin from Dalanghita (Citrus reticulata Blanco ) Peels

  Rnie Shayne Gaurana, Sean Alec Lois Sunga, Bernice Lyrem Joy Lim, Amelia Hizon-Fradejas, Sheryl Lozel Arreola

  91-104

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