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
FULL TEXT  |  DOWNLOAD PDF
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
FULL TEXT  |  DOWNLOAD PDF
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
FULL TEXT  |  DOWNLOAD PDF
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
FULL TEXT  |  DOWNLOAD PDF
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
FULL TEXT  |  DOWNLOAD PDF
REVIEW ARTICLE
Vol. 33 (2) June 2021, p. 181-214

OIL PALM ECONOMIC PERFORMANCE IN MALAYSIA AND R&D PROGRESS IN 2020 – Review Article


DOI: https://doi.org/10.21894/jopr.2021.0026  |   Published Online: 11 June 2021
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (2) June 2021, p. 347-359

PHASE BEHAVIOUR OF HIGH, MEDIUM AND LOW MELTING FRACTIONS IN LAURIC FAT BLENDS FORMULATED BASED ON MELTING TRIACYLGLYCEROL GROUP


DOI: https://doi.org/10.21894/jopr.2020.0078  |   Published Online: 5 October 2020
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (2) June 2021, p. 335-346

EFFECT OF FEEDING PALM OIL SLUDGE AS PARTIAL REPLACEMENT OF MAIZE IN GROWING-FINISHING PIGS ON THE GROWTH PERFORMANCE, NUTRIENT DIGESTIBILITY AND BLOOD PROFILES


DOI: https://doi.org/10.21894/jopr.2020.0083  |   Published Online: 7 October 2020
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (2) June 2021, p. 307-319

XYLAN RECOVERY FROM DILUTE NITRIC ACID PRETREATED OIL PALM FROND BAGASSE USING FRACTIONAL FACTORIAL DESIGN


DOI: https://doi.org/10.21894/jopr.2020.0093  |   Published Online: 27 October 2020
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (2) June 2021, p. 299-306

INVESTIGATION ON THE EFFECT OF MONOGLYCERIDE CONCENTRATION ON PALM OIL BASED ALKYD RESIN PREPARATION


DOI: https://doi.org/10.21894/jopr.2020.0086  |   Published Online: 7 October 2020
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (2) June 2021, p. 278-288

QUANTITATIVE APPROACH FOR IRRIGATION REQUIREMENT OF OIL PALM: CASE STUDY IN CHUPING, NORTHERN MALAYSIA


DOI: https://doi.org/10.21894/jopr.2020.0094  |   Published Online: 27 October 2020
FULL TEXT  |  DOWNLOAD PDF
REVIEW ARTICLE
Vol. 33 (3) September 2021, p. 387-399

POTENTIAL OF FUNCTIONALISED CELLULOSE FROM OIL PALM BIOMASS AS NITROGEN AND PHOSPHORUS BASED NUTRIENT ADSORBENT – A REVIEW


DOI: https://doi.org/10.21894/jopr.2020.0088  |   Published Online: 14 October 2020
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (3) September 2021, p. 524-531

DEVELOPMENT OF PALM-BASED VANASPATI (VEGETABLE GHEE): EFFECTS OF CRYSTALLISATION PROCEDURES ON THE PRODUCT TEXTURE


DOI: https://doi.org/10.21894/jopr.2020.0102  |   Published Online: 24 December 2020
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (3) September 2021, p. 514-523

PREDICTION OF ACID, PEROXIDE AND TBA VALUES OF HEAT-TREATED PALM OIL USING A PARTIAL LEAST SQUARES–ORDINARY LEAST SQUARES MODEL BASED ON FOURIERTRANSFORM INFRARED SPECTROSCOPY


DOI: https://doi.org/10.21894/jopr.2020.0106  |   Published Online: 30 November 2020
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (3) September 2021, p. 493-513

QUALITY OF COMMERCIAL PALM-BASED COOKING OIL PACKED IN PLASTIC POUCH AND POLYETHYLENE TEREPHTHALATE (PET) BOTTLE


DOI: https://doi.org/10.21894/jopr.2020.0089  |   Published Online: 15 October 2020
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (2) June 2021, p. 257-266

SOIL CARBON DIOXIDE (CO2) EFFLUX RATE AND OIL PALM YIELD FROM DIFFERENT PEAT TYPES IN SARAWAK, MALAYSIA


DOI: https://doi.org/10.21894/jopr.2020.0091  |   Published Online: 22 October 2020
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (2) June 2021, p. 248-256

EXPRESSION OF CADHERIN GENE IN Bacillus thuringiensis Cry1A TOXIN RESISTANT AND SUSCEPTIBLE STRAINS OF Tirathaba mundella


DOI: https://doi.org/10.21894/jopr.2020.0085  |   Published Online: 7 October 2020
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (2) June 2021, p. 227-234

A PROOF-OF-CONCEPT STUDY: DETERMINING THE GEOGRAPHICAL ORIGIN OF CRUDE PALM OIL WITH THE COMBINED USE OF GC-IMS FINGERPRINTING AND CHEMOMETRICS


DOI: https://doi.org/10.21894/jopr.2021.0013  |   Published Online: 7 April 2021
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (3) September 2021, p. 425-435

IDENTIFICATION AND DETERMINATION OF THE SPECTRAL REFLECTANCE PROPERTIES OF LIVE AND DEAD BAGWORMS, Metisa plana WALKER (Lepidoptera: Psychidae) USING VIS/ NIR SPECTROSCOPY


DOI: https://doi.org/10.21894/jopr.2020.0099  |   Published Online: 12 November 2020
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (3) September 2021, p. 413-424

PRELIMINARY STUDY ON EFFICIENCY OF DIFFERENT TIME AND LIGHT SOURCE IN LIGHT TRAPS FOR CAPTURING POPULATION OF ADULT OIL PALM BUNCH MOTH, Tirathaba mundella (Lepidoptera: Pyralidae)


DOI: https://doi.org/10.21894/jopr.2020.0095  |   Published Online: 27 October 2020
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (1) March 2021, p. 129-139

FRYING OIL QUALITY IN FAST FOOD RESTAURANTS IN EAST COAST MALAYSIA: A PRELIMINARY SURVEY


DOI: https://doi.org/10.21894/jopr.2020.0071  |   Published Online: 22 September 2020
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (1) March 2021, p. 119-128

PALM TOCOTRIENOLS CAUSE CLEAVAGE OF POLY-(ADP)-RIBOSE POLYMERASE ENZYME AND DOWN-REGULATION OF CYCLOOXYGENASE-2 PROTEIN LEVEL IN HUMAN BREAST CANCER CELLS


DOI: https://doi.org/10.21894/jopr.2020.0082  |   Published Online: 7 October 2020
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (1) March 2021, p. 93-102

EXTRACTION AND PURIFICATION OF PHYTOSTEROLS MIXTURE FROM PALM FATTY ACID DISTILLATE (PFAD) USING MULTISTAGE EXTRACTION PROCESSES


DOI: https://doi.org/10.21894/jopr.2020.0067  |   Published Online: 22 September 2020
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (1) March 2021, p. 74-83

EFFECT OF CATALYSTS ON THE YIELD AND PROPERTIES OF LIGNIN FROM MICROWAVEASSISTED ACETOSOLV EXTRACTION OF OIL PALM EMPTY FRUIT BUNCH FIBRES


DOI: https://doi.org/10.21894/jopr.2020.0076  |   Published Online: 5 October 2020
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (1) March 2021, p. 37-45

ECONOMIC INJURY LEVEL OF OIL PALM BUNCH MOTH, Tirathaba mundella WALKER FOR PEST MANAGEMENT RECOMMENDATIONS IN OIL PALM PRODUCTION


DOI: https://doi.org/10.21894/jopr.2020.0090  |   Published Online: 21 October 2020
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (1) March 2021, p. 21-36

POPULATION DENSITY OF Elaeidobius kamerunicus Faust IN DIFFERENT SPIKELET POSITION AT ANTHESISING MALE INFLORESCENCE OF Elaeis guineensis Jacq. IN SABAH AND SARAWAK, MALAYSIA


DOI: https://doi.org/10.21894/jopr.2020.0075  |   Published Online: 8 October 2020
FULL TEXT  |  DOWNLOAD PDF
RESEARCH ARTICLE
Vol. 33 (1) March 2021, p. 12-20

A RAPID AND EFFICIENT DNA EXTRACTION PROTOCOL FOR Ganoderma zonatum, A BASAL AND UPPER STEM ROT PATHOGEN OF OIL PALM IN MALAYSIA


DOI: https://doi.org/10.21894/jopr.2020.0058  |   Published Online: 11 September 2020
FULL TEXT  |  DOWNLOAD PDF