RESEARCH ARTICLE
Vol. 33 (4) December 2021, p. 703-712

RED PALM OIL IN LAYING DUCKS DIETS: EFFECTS ON PRODUCTIVE PERFORMANCE, EGG QUALITY, CONCENTRATIONS OF YOLK CAROTENOIDS


DOI: https://doi.org/10.21894/jopr.2021.0005  |   Published Online: 23 February 2021
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RESEARCH ARTICLE
Vol. 33 (4) December 2021, p. 689-702

CHARACTERISTICS OF RETAIL REFRIGERATED AND NON-REFRIGERATED MARGARINES/FAT SPREADS SOLD IN MALAYSIA


DOI: https://doi.org/10.21894/jopr.2021.0006  |   Published Online: 23 February 2021
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RESEARCH ARTICLE
Vol. 33 (4) December 2021, p. 653-667

THE EFFECT OF SATURATED AND UNSATURATED FATTY ACID COMPOSITION IN BIO-BASED LUBRICANT TO THE TRIBOLOGICAL PERFORMANCES USING FOUR-BALL TRIBOTESTER


DOI: https://doi.org/10.21894/jopr.2021.0010  |   Published Online: 16 March 2021
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RESEARCH ARTICLE
Vol. 33 (4) December 2021, p. 643-652

EFFECT OF OPERATING TEMPERATURE ON PHYSICOCHEMICAL PROPERTIES OF EMPTY FRUIT BUNCH CELLULOSE-DERIVED BIOCHAR


DOI: https://doi.org/10.21894/jopr.2021.0007  |   Published Online: 23 February 2021
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RESEARCH ARTICLE
Vol. 33 (4) December 2021, p. 620-642

MAPPING THE NITROGEN STATUS ON IMMATURE OIL PALM AREA IN MALAYSIAN OIL PALM PLANTATION WITH AUTOPILOT TRACTOR-MOUNTED ACTIVE LIGHT SENSOR


DOI: https://doi.org/10.21894/jopr.2021.0012  |   Published Online: 7 April 2021
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