RESEARCH ARTICLE
Vol. 34 (3) September 2022, p. 506-523

INVESTIGATING THE POTENTIAL ANTI-DIABETIC MECHANISMS OF WATER-SOLUBLE PALM FRUIT EXTRACT

SOON-SEN LEOW^1,*; NORFAZLINA MOHD NAWI^1,2; SYED FAIRUS¹ and RAVIGADEVI SAMBANTHAMURTHI^1,3
DOI: https://doi.org/10.21894/jopr.2022.0001  |   Published Online: 17 January 2022
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RESEARCH ARTICLE
Vol. 34 (3) September 2022, p. 524-534

OPTIMISATION OF REACTION PARAMETERS FOR THE SYNTHESIS OF SOLKETAL LEVULINATE AS POTENTIAL BIODIESEL ADDITIVE

NMD NIK SITI MARIAM¹ *; SENG SOI HOONG¹ ; MOHD ZAN ARNIZA¹ ; SRIHANUM ADNAN¹ ; TUAN NOOR MAZNEE TUAN ISMAIL¹ ; SHOOT KIAN YEONG¹ and MUHAMMAD RAHIMI YUSOP²
DOI: https://doi.org/10.21894/jopr.2021.0052  |   Published Online: 21 December 2021
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ARTICLE IN PRESS
Vol. 34 (3) September 2022, p. 535-545

PALM-BASED CHOCOLATE SPREAD FOR WIDE RANGE TEMPERATURE APPLICATIONS USING SUNFLOWER WAX, CARNAUBA WAX AND BEES WAX

NORAZURA AILA MOHD HASSIM¹ *; SIVARUBY KANAGARATNAM¹ ; NUR HAQIM ISMAIL¹ ; NOOR LIDA HABI MAT DIAN¹ ; WAN ROSNANI AWG ISA¹ and NOOR SOFFALINA SOFIAN SENG²
DOI: https://doi.org/10.21894/jopr.2021.0051  |   Published Online: 21 December 2021
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REVIEW ARTICLE
Vol. 34 (2) June 2022, p. 219-233

AN OVERVIEW OF THE DEVELOPMENT OF THE OIL PALM INDUSTRY AND IMPACT OF THE SHELL GENE INNOVATION AS A QUALITY CONTROL TOOL TO IMPROVE PRODUCTIVITY

SINGH, R¹; LEE, K T²; OOI, L C L¹; LOW, E T L¹; ABDULLAH, M O¹; SAMBANTHAMURTHI, R¹ and AZMAN, I¹*
DOI: https://doi.org/10.21894/jopr.2021.0001  |   Published Online: 7 January 2021
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RESEARCH ARTICLE
Vol. 34 (2) June 2022, p. 234-247

ALL-IN-ONE COMPREHENSIVE EXTRACTION OF METABOLITES, PROTEINS AND RIBONUCLEIC ACID FOR THE RAPID ANALYSIS OF OIL PALM SYSTEMS BIOLOGY

SYAHANIM SHAHWAN¹ *; ABRIZAH OTHMAN¹ ; ZAIN NURAZAH¹ ; NURUL LIYANA ROZALI¹ and UMI SALAMAH RAMLI¹
DOI: https://doi.org/10.21894/jopr.2021.0040  |   Published Online: 6 October 2021
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RESEARCH ARTICLE
Vol. 34 (2) June 2022, p. 248-260

PUBLIC ENGAGEMENT PROMOTES CONSUMER CHOICE IN FAVOUR OF SUSTAINABLE PALM OIL

LAURA K HOBBS¹; JOSIE W PHILLIPS²; AMY B STAFF²; AMBER GOSS²; LAURA FOGG-ROGERS¹ and M D FARNON ELLWOOD^3*
DOI: https://doi.org/10.21894/jopr.2021.0033  |   Published Online: 11 August 2021
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RESEARCH ARTICLE
Vol. 34 (2) June 2022, p. 261-275

IDENTIFICATION OF OIL PALM ROOT-SPECIFIC GENES THROUGH MINING OF RNA-SEQ DATA AND RT-qPCR ANALYSIS

SUBHI SITI MASURA¹,^2*; OMAR ABD RASID¹; NOOR AZMI SHAHARUDDIN², ³; MAT YUNUS ABDUL MASANI¹; KUANG-LIM CHAN¹; ENG-TI LESLIE LOW¹; SITI SURIAWATI BADAI¹; AYUB NOR HANIN¹; ABDUL RAHMAN SITI RAHMAH¹; MOHD PUAD ABDULLAH²; AZZREENA MOHAMAD AZZEME² and GHULAM KADIR AHMAD PARVEEZ¹
DOI: https://doi.org/10.21894/jopr.2021.0036  |   Published Online: 30 August 2021
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RESEARCH ARTICLE
Vol. 34 (2) June 2022, p. 276-288

EFFECTIVENESS OF Bacillus thuringiensis AERIAL SPRAYING AGAINST THE BAGWORM, Metisa plana WALKER (Lepidoptera: Psychidae) OUTBREAK IN OIL PALM USING DRONE

MOHAMED MAZMIRA MOHD MASRI¹*; NOORHAZWANI KAMARUDIN¹; NUR ROBAATUL MOHD ALI NAPIAH¹ and MOHD FAHMI KENI¹
DOI: https://doi.org/10.21894/jopr.2021.0045  |   Published Online: 23 November 2021
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RESEARCH ARTICLE
Vol. 34 (3) September 2022, p. 546-561

TOPICAL APPLICATION OF THE PALM TOCOTRIENOL-RICH FRACTION (TRF) ENHANCES CUTANEOUS WOUND HEALING IN TYPE 2 DIABETIC MICE

ZAIZUHANA SHAHRIM^1,2*; SUZANA MAKPOL²; GEOK CHIN TAN³; NURUL AISHAH MUHAMMAD¹ and ZAFARIZAL ALDRIN AZIZUL HASAN¹
DOI: https://doi.org/10.21894/jopr.2021.0054  |   Published Online: 5 January 2022
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RESEARCH ARTICLE
Vol. 34 (2) June 2022, p. 289-299

APPLICATION OF TARGETED GOAT GRAZING IN OIL PALM PLANTATIONS: ASSESSMENT OF WEED PREFERENCE, SPATIAL USE OF GRAZING AREA AND LIVE WEIGHT CHANGE

FRISCO NOBILLY^1,2*; THOMAS MANLIT RAYMOND MAXWELL³; MUHAMMAD SYAFIQ YAHYA⁴ and BADRUL AZHAR^4,5
DOI: https://doi.org/10.21894/jopr.2021.0047  |   Published Online: 23 November 2021
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RESEARCH ARTICLE
Vol. 34 (2) June 2022, p. 300-310

PARAMETRIC STUDY ON TRASH SEPARATION EFFICIENCY IN FFB CONSIGNMENT

CHE RAHMAT CHE MAT¹,^2*; ROHAYA MOHAMED HALIM¹; NADIAHNOR MD YUSOP²,³; NU’MAN ABDUL HADI¹ and ANDREW YAP KIAN CHUNG¹
DOI: https://doi.org/10.21894/jopr.2021.0035  |   Published Online: 25 August 2021
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SHORT COMMUNICATION
Vol. 34 (4) December 2022, p. 762-768

OPTIMISATION OF ETHYLENE TREATMENT CONDITIONS FOR OIL PALM FRUIT DETACHMENT USING RESPONSE SURFACE METHODOLOGY

MOHD IBNUR SYAWAL ZAKARIA¹*; ARUTCHELVAM BALAKRISHNAN¹; BEE AIK TAN¹; JAIME YOKE SUM LOW¹; SHWU FUN KUA¹; CHIN MING LIM¹ and DAVID ROSS APPLETON¹
DOI: https://doi.org/10.21894/jopr.2022.0040  |   Published Online: 21 July 2022
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RESEARCH ARTICLE
Vol. 34 (2) June 2022, p. 311-322

MICROBIAL PROTEIN EXTRACTION FROM PALM OIL MILL EFFLUENT

NOR FAIZAH, J¹*; NOORSHAMSIANA, A W¹; WAN HASAMUDIN, W H¹; NAHRUL HAYAWIN, Z¹; ROPANDI, M¹; NUR ELIYANTI, A O¹; ASTIMAR, A A¹ and ROHAYA, M H¹
DOI: https://doi.org/10.21894/jopr.2021.0037  |   Published Online: 28 September 2021
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RESEARCH ARTICLE
Vol. 34 (3) September 2022, p. 562-570

TOXICOLOGICAL ASSESSMENT OF REFINED PALM-PRESSED MESOCARP FIBRE OIL

KIM-TIU TENG^1*; RADHIKA LOGANATHAN¹; EE LING SIEW^2,3; HARRISON LIK NANG LAU¹ and NOR FADILAH RAJAB^3,4
DOI: https://doi.org/10.21894/jopr.2022.0010  |   Published Online: 31 January 2022
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RESEARCH ARTICLE
Vol. 34 (2) June 2022, p. 323-336

PALM OLEIN LUBRICATES AND REMOVES FRESHLY BAKED CONCRETE FROM ITS FORMWORK

SOH KHEANG LOH¹* and NGATIMAN MUZZAMMIL¹
DOI: https://doi.org/10.21894/jopr.2021.0038  |   Published Online: 28 September 2021
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RESEARCH ARTICLE
Vol. 34 (2) June 2022, p. 337-347

INFLUENCE OF CHEMICAL COMPOSITION OF ACTIVATED CALCIUM BENTONITES AND SODIUM BENTONITES ON PALM OIL BLEACHING CAPACITY AND OIL QUALITY

DOLPHEN, R¹; DHURAKIT, P² and THIRAVETYAN, P²*
DOI: https://doi.org/10.21894/jopr.2021.0043  |   Published Online: 29 October 2021
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RESEARCH ARTICLE
Vol. 34 (2) June 2022, p. 348-355

DEVELOPMENT AND VALIDATION OF AN LC-MS/MS METHOD FOR DETERMINATION OF RESIDUAL 2,4-DICHLOROPHENOXYACETIC ACID HERBICIDE IN PALM OIL

NAJWA SULAIMAN^1*; YEOH CHEE BENG¹; NIK SASHA KHATRINA KHAIRUDDIN¹ and FARAH KHUWAILAH AHMAD BUSTAMAM¹
DOI: https://doi.org/10.21894/jopr.2021.0042  |   Published Online: 26 October 2021
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RESEARCH ARTICLE
Vol. 34 (2) June 2022, p. 356-367

EFFECTS OF INTERESTERIFIED FATS ON LIPOPROTEIN SUB FRACTIONS AND HEPATIC GENE EXPRESSIONS IN A HAMSTER MODEL

GOWRI NAGAPAN¹*; GOH YONG MENG²; NOOR LIDA HABI MAT DIAN¹; CHE ANISHAS CHE IDRIS¹; KANGA RANI SELVADURAY¹ and NAGENDRAN BALASUNDRAM¹
DOI: https://doi.org/10.21894/jopr.2021.0046  |   Published Online: 22 November 2021
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REVIEW ARTICLE
Vol. 34 (1) March 2022, p. 1-25

OMICS PLATFORM TECHNOLOGIES FOR DISCOVERY AND UNDERSTANDING THE SYSTEMS BIOLOGY OF OIL PALM – Review Article

UMI SALAMAH RAMLI¹*; ABRIZAH OTHMAN¹; BENJAMIN LAU YII CHUNG¹; HASLIZA HASSAN¹; NUR ‘AIN MOHD ISHAK¹; ZAIN NURAZAH¹; NURUL LIYANA ROZALI¹; NOOR IDAYU MHD TAHIR¹; SYAHANIM SHAHWAN¹; SHAHIRAH BALQIS DZULKAFLI¹; RAJINDER SINGH¹; OMAR ABD RASID¹; RAVIGADEVI SAMBANTHAMURTHI¹; MOHAMAD ARIF ABD MANAF¹ and GHULAM KADIR AHMAD PARVEEZ¹
DOI: https://doi.org/10.21894/jopr.2020.0084  |   Published Online: 7 October 2020
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RESEARCH ARTICLE
Vol. 34 (2) June 2022, p. 368-379

PALM GAMMA-TOCOTRIENOL SUPPLEMENTATION SUPPRESS TUMOUR GROWTH AND METASTASIS IN A SYNGENEIC MOUSE MODEL OF BREAST CANCER

SHONIA SUBRAMANIAM^1,2; AMMU KUTTY RADHAKRISHNAN³; JEYA SEELA ANANDHA RAO⁴; PREMDASS RAMDAS⁵; NG MEI HAN²; METHIL KANNAN KUTTY⁶ and KANGA RANI SELVADURAY^2*
DOI: https://doi.org/10.21894/jopr.2021.0048  |   Published Online: 22 November 2021
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RESEARCH ARTICLE
Vol. 34 (1) March 2022, p. 26-34

MORPHO-PHYSIOLOGICAL ASSESSMENT OF OIL PALM (Elaeis guineensis Jacq.) SEEDLINGS EXPOSED TO SIMULATED DROUGHT CONDITIONS

IKHAJIAGBE, B¹; AITUAE, W² and OGWU, M C³*
DOI: https://doi.org/10.21894/jopr.2021.0018  |   Published Online: 4 May 2021
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RESEARCH ARTICLE
Vol. 34 (1) March 2022, p. 35-45

HISTONE MODIFICATION MARKS IMPROVE IDENTIFICATION OF OIL PALM TRANSCRIPTION START SITES

SARPAN, N¹; TATARINOVA, T V²; LOW, E-T L¹; ONG-ABDULLAH, M¹; SAPIAN, I S³ and OOI, S-E¹*
DOI: https://doi.org/10.21894/jopr.2021.0021  |   Published Online: 19 May 2021
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RESEARCH ARTICLE
Vol. 34 (1) March 2022, p. 46-55

CORRELATION BETWEEN NON-RIBOSOMAL PEPTIDE SYNTHETASE (NRPS) PRODUCTION AND VIRULENCE OF Ganoderma boninense PER71 ON OIL PALM (Elaeis guineensis)

JACKIE CHUA¹; KWAN YEE MIN²; ABRIZAH OTHMAN¹* and WONG MUI YUN³
DOI: https://doi.org/10.21894/jopr.2021.0025  |   Published Online: 31 May 2021
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RESEARCH ARTICLE
Vol. 34 (1) March 2022, p. 56-67

GROWTH AND DEVELOPMENT OF OIL PALM CLONE P164 EXPOSED TO LONGTERM CARBON DIOXIDE ENRICHMENT IN OPEN TOP CHAMBER

AMANINA, N S¹*; LINATOC, A C²; HANIFF, M H¹ and ROSLAN, M N¹
DOI: https://doi.org/10.21894/jopr.2021.0030  |   Published Online: 5 July 2021
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RESEARCH ARTICLE
Vol. 34 (1) March 2022, p. 68-78

ASSOCIATION OF SEED COLOUR WITH GERMINATION, PHYSICAL AND PHYSIOLOGICAL GROWTH OF OIL PALM (Elaeis guineensis) SEEDLINGS

M G NORSAZWAN¹; U R SINNIAH¹*; A B PUTEH¹; P NAMASIVAYAM²; D R APPLETON³; M MOHAIMI⁴ and I A AMINUDDIN⁴
DOI: https://doi.org/10.21894/jopr.2021.0031  |   Published Online: 5 July 2021
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RESEARCH ARTICLE
Vol. 34 (1) March 2022, p. 79-91

THE EFFECTS OF RECYCLING PALM PRESSEDFIBRE OIL ON CRUDE PALM OIL QUALITY

HASLIYANTI, A¹*; RUSNANI, A M¹; WAN HASAMUDIN, W H¹; NG, M H¹; NOR FAIZAH, J¹ and ROHAYA, M H¹
DOI: https://doi.org/10.21894/jopr.2021.0016  |   Published Online: 26 April 2021
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RESEARCH ARTICLE
Vol. 34 (1) March 2022, p. 92-103

NUTRIENT ENHANCEMENT OF PALM KERNEL CAKE VIA SOLID STATE FERMENTATION BY LOCALLY ISOLATED Rhizopus oryzae ME01

MOHD FIRDAUS, O¹*; ROHAYA, M H¹; MISKANDAR, M S¹ and ASTIMAR, A A¹
DOI: https://doi.org/10.21894/jopr.2021.0022  |   Published Online: 19 May 2021
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REVIEW ARTICLE
Vol. 33 (4) December 2021, p. 565-576

BREEDING Virescens OIL PALM

VENGETA RAO* and CHANG, K C**
DOI: https://doi.org/10.21894/jopr.2020.0098  |   Published Online: 12 November 2020
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RESEARCH ARTICLE
Vol. 34 (1) March 2022, p. 104-115

EFFECT OF BIOFUEL ON LIGHT-DUTY VEHICLES ENGINE PERFORMANCE AND LUBE OIL DEGRADATION

M ROPANDI¹; Z NAHRUL HAYAWIN¹; A A ASTIMAR¹; A W NOORSHAMSIANA¹; R RIDZUAN¹* and I ZAWAWI¹
DOI: https://doi.org/10.21894/jopr.2021.0023  |   Published Online: 19 May 2021
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RESEARCH ARTICLE
Vol. 34 (1) March 2022, p. 116-128

THE COLD FLOW PROPERTIES OF PALM BIODIESEL FOR DIESEL BLENDS MANDATE IN MALAYSIA’S HIGHLANDS

NURSYAIRAH JALIL^1,2; HARRISON LIK NANG LAU¹* and RIFQI IRZUAN ABDUL JALAL²
DOI: https://doi.org/10.21894/jopr.2021.0027  |   Published Online: 15 June 2021
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RESEARCH ARTICLE
Vol. 34 (1) March 2022, p. 129-138

ASSESSMENT OF TRANS FATTY ACID LEVELS IN REFINED PALM-BASED OILS AND COMMERCIAL VEGETABLE OILS IN THE MALAYSIAN MARKET

HISHAMUDDIN, E¹*; ABD RAZAK, R A¹; YEOH, C B¹* and AHMAD TARMIZI, A H¹
DOI: https://doi.org/10.21894/jopr.2021.0029  |   Published Online: 21 June 2021
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SHORT COMMUNICATION
Vol. 33 (4) December 2021, p. 732-738

IS THERE A SUSTAINABLE FUTURE FOR WILDLIFE IN OIL PALM PLANTATIONS IN MALAYSIA?

JAYASILAN MOHD-AZLAN* and LISA LOK*
DOI: https://doi.org/10.21894/jopr.2020.0104  |   Published Online: 23 November 2020
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RESEARCH ARTICLE
Vol. 34 (2) June 2022, p. 380-393

EFFECT OF SODIUM CASEINATE/CELLULOSE NANOCRYSTALS ADDITION ON THE PHYSICAL AND OXIDATIVE STABILITY OF RED PALM OLEIN-IN-WATER PICKERING EMULSIONS

SEE KIAT WONG¹; CHIEN LYE CHEW^1,2; JANARTHANAN SUPRAMANIAM¹; BENG TI TEY^1,3; TIN WUI WONG⁴ and SIAH YING TANG^1,3,5*
DOI: https://doi.org/10.21894/jopr.2021.0049  |   Published Online: 3 December 2021
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RESEARCH ARTICLE
Vol. 34 (1) March 2022, p. 139-151

INHIBITION OF CHOLINESTERASES BY WATER-SOLUBLE PALM FRUIT EXTRACT

SOON-SEN LEOW¹*; SYED FAIRUS¹ and RAVIGADEVI SAMBANTHAMURTHI²
DOI: https://doi.org/10.21894/jopr.2021.0028  |   Published Online: 17 June 2021
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RESEARCH ARTICLE
Vol. 33 (4) December 2021, p. 724-731

STABILITY AND PERFORMANCE OF PALMBASED TRANSPARENT SOAP WITH OIL PALM LEAVES EXTRACT

NORASHIKIN AHMAD*; ZAFARIZAL ALDRIN AZIZUL HASAN* and SITI HAJAR BILAL*
DOI: https://doi.org/10.21894/jopr.2021.0024  |   Published Online: 19 May 2021
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RESEARCH ARTICLE
Vol. 34 (1) March 2022, p. 152-166

SYNTHESIS AND PHYSICOCHEMICAL PROPERTIES OF NEW ESTOLIDE ESTERS AS POTENTIAL BIOLUBRICANT BASE OIL

SENG SOI HOONG¹*; MOHD ZAN ARNIZA¹; NEK MAT DIN NIK SITI MARIAM¹; ABU HASSAN NOOR ARMYLISAS¹; SOOK WAH TANG¹; TUAN NOOR MAZNEE TUAN ISMAIL¹ and SHOOT KIAN YEONG¹
DOI: https://doi.org/10.21894/jopr.2021.0032  |   Published Online: 21 July 2021
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RESEARCH ARTICLE
Vol. 33 (4) December 2021, p. 713-723

DOES PALM MID FRACTION AFFECT ADULT SATIETY?

VOON, P T*; TOH, S W H**; NG, T K W‡; LEE, V K M**; YONG, X S**; YAP, S Y* and NESARETNAM, K‡‡
DOI: https://doi.org/10.21894/jopr.2021.0020  |   Published Online: 4 May 2021
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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

YIFEI LU*; SHUNAN DONG**; HAITENG ZHOU*; LIGANG YANG*; ZHAODAN WANG*; DA PAN*; XIAN YANG*; HUI XIA*; GUIJU SUN* and SHAOKANG WANG*
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

SIVARUBY KANAGARATNAM*; TENG KIM TIU*; NUR HAQIM ISMAIL*; NORAZURA AILA MOHD HASSIM*; WAN ROSNANI AWG ISA* and NOOR LIDA HABI MAT DIAN*
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. 678-688

THE EFFECT OF MICROWAVE TREATMENT AND DELAYED HARVESTING ON OIL PALM FRUITLETS (Elaeis guineensis) OIL QUALITY

NU’MAN ABDUL HADI*; NG MEI HAN*; RUSNANI ABD MAJID* and CHE RAHMAT CHE MAT*
DOI: https://doi.org/10.21894/jopr.2021.0015  |   Published Online: 20 April 2021
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RESEARCH ARTICLE
Vol. 33 (4) December 2021, p. 668-677

OPTIMISATION OF ALKALI EXTRACTION OF PALM KERNEL CAKE PROTEIN

FATAH YAH ABD MANAF* and NOOR LIDA HABI MAT DIAN*
DOI: https://doi.org/10.21894/jopr.2021.0011  |   Published Online: 1 April 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

ZULHANAFI, P*; SYAHRULLAIL, S*; ABDUL HAMID, M K* and CHONG W W F*
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

STASHA ELEANOR ROSLAND ABEL*,^‡ ; SOH KHEANG LOH*; NOORSHAMSIANA ABDUL WAHAB*; ONDREJ MASEK**; MUSA IDRIS TANIMU^‡ and ROBERT THOMAS BACHMANN^‡
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

ROHAIDA MOHAMMAD*; DARIUS EL PEBRIAN*; MOHAMMAD ANAS AZMI* and EZRIN MOHD HUSIN**
DOI: https://doi.org/10.21894/jopr.2021.0012  |   Published Online: 7 April 2021
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RESEARCH ARTICLE
Vol. 33 (4) December 2021, p. 617-628

BIRD SPECIES RICHNESS, ABUNDANCE AND THEIR FEEDING GUILD ACROSS OIL PALMS DEVELOPMENT THROUGH MIST-NETTING METHOD IN BETONG, SARAWAK

AMIT, B*; TUEN, A A** and KHO, L K*
DOI: https://doi.org/10.21894/jopr.2021.0017  |   Published Online: 27 April 2021
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RESEARCH ARTICLE
Vol. 34 (3) September 2022, p. 571-579

ESTIMATING THE SHELF LIFE OF FLAVOURING OIL GRAVY CONSISTING OF RED PALM OIL

GUANGYI GONG¹; XIAOJING WU¹; SHIMIN WU^1,2*; JUNHAO YOONG3, MIN JI³ and MINGMING HU³
DOI: https://doi.org/10.21894/jopr.2022.0011  |   Published Online: 15 February 2022
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SHORT COMMUNICATION
Vol. 34 (3) September 2022, p. 580-589

MOLECULAR IDENTIFICATION AND PHYLOGENETIC ANALYSIS OF FUNGI AND BACTERIA ASSOCIATED TO COMMON SPEAR ROT DISEASE IN MALAYSIA

NUR DIYANA ROSLAN¹; INTAN NUR AINNI MOHAMED AZNI¹ and SHAMALA SUNDRAM¹*
DOI: https://doi.org/10.21894/jopr.2021.0039  |   Published Online: 29 September 2021
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SHORT COMMUNICATION
Vol. 34 (2) June 2022, p. 394-400

SHORT COMMUNICATION: SIMPLIFIED APPROACH FOR EARLY IDENTIFICATION OF SPONTANEOUS OIL PALM HAPLOID (Elaeis guineensis)

MUHAMMAD AZWAN, Z¹ ; ZAKI, N M¹ *; NORDIANA, H M N¹ ; MADON, M² ; NORZIHA, A¹ ; ZULKIFLI, Y¹ ; CHAN, P L¹ and SINGH, R¹
DOI: https://doi.org/10.21894/jopr.2021.0019  |   Published Online: 4 May 2021
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RESEARCH ARTICLE
Vol. 33 (4) December 2021, p. 607-616

EVALUATION OF MITOCHONDRIAL DNA ISOLATION METHODS FOR OIL PALM (Elaeis guineensis) LEAF

AZIMI NURAZIYAN*; SIEW-ENG OOI* and MEILINA ONG-ABDULLAH*
DOI: https://doi.org/10.21894/jopr.2021.0009  |   Published Online: 16 March 2021
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RESEARCH ARTICLE
Vol. 34 (1) March 2022, p. 167-176

PHYSICOCHEMICAL PROPERTIES OF PALM OLEIN-BASED POLYOLS PREPARED USING HOMOGENEOUS AND HETEROGENEOUS CATALYSTS

NORHAYATI MOHD NOOR^1*; TUAN NOOR MAZNEE TUAN ISMAIL¹; MOHD AZMIL MOHD NOOR¹; KOSHEELA DEVI POO PALAM¹; MOHD NORHISHAM SATTAR¹; NURUL ‘AIN HANZAH¹; SRIHANUM ADNAN¹ and YEONG SHOOT KIAN¹
DOI: https://doi.org/10.21894/jopr.2021.0034  |   Published Online: 25 August 2021
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RESEARCH ARTICLE
Vol. 33 (4) December 2021, p. 588-606

A COMPARATIVE STUDY OF BACTERIAL COMMUNITIES DETERMINED BY CULTUREDEPENDENT AND-INDEPENDENT APPROACHES IN OIL PALM PLANTED ON TROPICAL PEATLAND

AYOB, ZAHIDAH* and KUSAI, NOR AZIZAH*
DOI: https://doi.org/10.21894/jopr.2021.0008  |   Published Online: 26 February 2021
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RESEARCH ARTICLE
Vol. 33 (4) December 2021, p. 577-587

GENETIC TRANSFORMATION OF OIL PALMBASED ON SELECTION WITH HYGROMYCIN

BAHARIAH, B*; RASID, O A*; RAHMAH, A R S*; PARVEEZ, G K A* and MASANI, M Y A*
DOI: https://doi.org/10.21894/jopr.2020.0111  |   Published Online: 9 December 2020
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SHORT COMMUNICATION
Vol. 34 (1) March 2022, p. 177-183

SENSORY EVALUATION OF FILLETS FROM TILAPIA (Oreochromis niloticus) FED DIETS CONTAINING OIL PALM LIPIDS

WAN NOORAIDA, W M¹*; ABIDAH, M N¹; NUR ATIKAH, I¹; MOOKIAH, S¹; MUHAMMAD AMIRUL, F¹ and RAFIDAH, A H¹
DOI: https://doi.org/10.21894/jopr.2020.0108  |   Published Online: 9 December 2020
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REVIEW ARTICLE
Vol. 33 (2) June 2021, p. 181-214

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

GHULAM KADIR AHMAD PARVEEZ*; AZMIL HAIZAM AHMAD TARMIZI*; SHAMALA SUNDRAM*; SOH KHEANG LOH*; MEILINA ONG-ABDULLAH*; KOSHEELA DEVI POO PALAM*; KAMALRUDIN MOHAMED SALLEH*; SHEILYZA MOHD ISHAK* and ZAINAB IDRIS*
DOI: https://doi.org/10.21894/jopr.2021.0026  |   Published Online: 11 June 2021
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RESEARCH ARTICLE
Vol. 33 (2) June 2021, p. 381-386

POTENTIAL OF Syncephalastrum racemosum AND Rhizopus arrhizus ISOLATED FROM OIL PALM TRUNKS PRODUCE CHITOSANS THAT INHIBIT THE GROWTH OF Ganoderma boninense

FAHRIZAL, M*; SARIFUDDIN* and SABRINA, T*
DOI: https://doi.org/10.21894/jopr.2020.0062  |   Published Online: 11 September 2020
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RESEARCH ARTICLE
Vol. 33 (2) June 2021, p. 360-380

BLENDED PALM FRACTIONS AS CONFECTIONERY FATS: A PRELIMINARY STUDY

NORAZURA AILA MOHD HASSIM*; SIVARUBY KANAGARATNAM* and NOOR LIDA HABI MAT DIAN*
DOI: https://doi.org/10.21894/jopr.2020.0101  |   Published Online: 17 November 2020
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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

BANGUN NUSANTORO*,**; YANTY NOORZIANNA MANAF#; DAVY VAN DE WALLE*; FILIP VAN BOCKSTAELE* and KOEN DEWETTINCK*
DOI: https://doi.org/10.21894/jopr.2020.0078  |   Published Online: 5 October 2020
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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

TEMJENNUNGSANG*; SAMANTA, A K*; ALI, M A**; DAS, B K* and GIRIN, G K‡
DOI: https://doi.org/10.21894/jopr.2020.0083  |   Published Online: 7 October 2020
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RESEARCH ARTICLE
Vol. 33 (2) June 2021, p. 327-334

GROWTH PERFORMANCE AND CARCASS TRAITS OF GOATS FED WITH OIL PALM BYPRODUCTS BASED FEED PELLET

NUR ATIKAH IBRAHIM*; WAN NOORAIDA WAN MOHAMED*; ‘ABIDAH MD NOH* and MOOKIAH SAMINATHAN*
DOI: https://doi.org/10.21894/jopr.2020.0064  |   Published Online: 22 September 2020
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RESEARCH ARTICLE
Vol. 33 (2) June 2021, p. 320-326

METHANOLIC EXTRACTION OF FREE FERULIC ACID FROM OIL PALM

NG MEI HAN*
DOI: https://doi.org/10.21894/jopr.2020.0097  |   Published Online: 6 November 2020
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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

NURUL AISHAH MAZLAN*; KAMALIAH ABDUL SAMAD*; HAFIZUDDIN WAN YUSSOF*; ROZAIMI ABU SAMAH** and JAMALIAH MD JAHIM‡
DOI: https://doi.org/10.21894/jopr.2020.0093  |   Published Online: 27 October 2020
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RESEARCH ARTICLE
Vol. 33 (2) June 2021, p. 299-306

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

RIDZUAN RAMLI*; HUEI RUEY ONG**; CHI SHEIN HONG#; MD. MAKSUDUR RAHMAN KHAN##; ROSLI MOHD YUNUS#; ROHAYA MOHAMED HALIM*; ASTIMAR ABDUL AZIZ*; ZAWAWI IBRAHIM* and MUHAMMAD REMANUL ISLAM##
DOI: https://doi.org/10.21894/jopr.2020.0086  |   Published Online: 7 October 2020
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RESEARCH ARTICLE
Vol. 33 (2) June 2021, p. 289-298

ODOUR EXPOSURE LEVEL MEASUREMENT SURROUNDING PALM OIL MILL

ANDREW YAP KIAN CHUNG*; NASTAEIN QAMARUZ ZAMAN**; ROHAYA MOHAMED HALIM*; FATAH YAH ABD MANAF* and NU’MAN ABDUL HADI*
DOI: https://doi.org/10.21894/jopr.2020.0073  |   Published Online: 30 September 2020
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RESEARCH ARTICLE
Vol. 33 (2) June 2021, p. 278-288

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

MOHD SHAHKHIRAT NORIZAN*; AIMRUN WAYAYOK‡,‡‡; YAHYA ABD KARIM**; AHMAD FIKRI ABDULLAH‡,‡‡ and MUHAMMAD RAZIF MAHADI‡,‡‡
DOI: https://doi.org/10.21894/jopr.2020.0094  |   Published Online: 27 October 2020
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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

MEI MEI CHONG¹; LIAN SEE TAN¹*; NURFATEHAH WAHYUNY CHE JUSOH¹; MASAFUMI GOTO¹ and SUMATHI SETHUPATHI²
DOI: https://doi.org/10.21894/jopr.2020.0088  |   Published Online: 14 October 2020
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SHORT COMMUNICATION
Vol. 33 (3) September 2021, p. 555-564

PRINCIPAL COMPONENT ANALYSIS (PCA) EVALUATION OF LIQUID CHROMATOGRAPHYMASS SPECTROMETRY (LC-MS) DATASETS OF Ganoderma boninense INTRACELLULAR METABOLITES

ZAIN NURAZAH1*; ABRIZAH OTHMAN¹ and UMI SALAMAH RAMLI¹
DOI: https://doi.org/10.21894/jopr.2020.0103  |   Published Online: 20 November 2020
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RESEARCH ARTICLE
Vol. 33 (3) September 2021, p. 542-554

RHEOLOGICAL PROPERTIES OF PALM-BASED CARBOXYMETHYL CELLULOSE SOLUTIONS

NOR ZULIANA YUSOF*; ZAFARIZAL ALDRIN AZIZUL HASAN*; NUR ELIYANTI ALI OTHMAN* and YUSRABBIL AMIYATI YUSOF*
DOI: https://doi.org/10.21894/jopr.2020.0110  |   Published Online: 9 December 2020
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RESEARCH ARTICLE
Vol. 33 (3) September 2021, p. 532-541

IS PALM MID FRACTION A HEALTHIER CHOICE AS A COCOA BUTTER EQUIVALENT?

VOON, P T^1*; TOH, S W H²; NG, T K W³; LEE, V K M²; YONG, X S²; NG, Y T¹ and NESARETNAM, K⁴
DOI: https://doi.org/10.21894/jopr.2020.0100  |   Published Online: 12 November 2020
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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

RAFIDAH ABD HAMID¹*; SIVARUBY KANAGARATNAM¹; NORAZURA AILA MOHD HASSIM¹; NUR HAQIM ISMAIL¹; WAN ROSNANI AWG ISA¹ and NOOR LIDA HABI MAT DIAN¹
DOI: https://doi.org/10.21894/jopr.2020.0102  |   Published Online: 24 December 2020
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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

KUSNANDAR, F¹*; LIOE, H N¹; FARIDAH, D N¹; ANGGRAENI, R¹ and PRICILIA¹
DOI: https://doi.org/10.21894/jopr.2020.0106  |   Published Online: 30 November 2020
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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

NORAZURA AILA MOHD HASSIM¹*; NUR HAQIM ISMAIL¹; SIVARUBY KANAGARATNAM¹; WAN ROSNANI AWG ISA¹ and NOOR LIDA HABI MAT DIAN¹
DOI: https://doi.org/10.21894/jopr.2020.0089  |   Published Online: 15 October 2020
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RESEARCH ARTICLE
Vol. 33 (3) September 2021, p. 482-492

DRYING OF OIL PALM LUMBER BY COMBINING AIR FORCE DRYING AND MODIFIED SUPERFAST DRYING METHODS

MUHAMMAD NADZIM, M N*; EDI, S B*; MOJTABA, S**; ZAIDON, A* and LEE, S H‡
DOI: https://doi.org/10.21894/jopr.2021.0002  |   Published Online: 7 January 2021
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RESEARCH ARTICLE
Vol. 33 (3) September 2021, p. 473-481

PRODUCTION OF FURFURAL FROM OIL PALM FIBRES

NUR ELIYANTI ALI OTHMAN¹*; ASTIMAR ABD AZIZ¹; WAN HASAMUDIN WAN HASSAN¹; NOR FAIZAH JAILANI¹; FAZLIANA ABD HAMID¹ and NOORSHAMSIANA ABDUL WAHAB¹
DOI: https://doi.org/10.21894/jopr.2020.0109  |   Published Online: 9 December 2020
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RESEARCH ARTICLE
Vol. 33 (3) September 2021, p. 458-472

QUALITY IMPROVEMENT OF PALM KERNEL CAKE AS BROILER FEED USING PRE-CLEANING SYSTEM

ROHAYA MOHAMED HALIM*; RIDZUAN RAMLI*; CHE RAHMAT CHE MAT*; NU’MAN ABDUL HADI*; MOHD FIRDAUS OTHMAN* and ASTIMAR ABD AZIZ*
DOI: https://doi.org/10.21894/jopr.2020.0112  |   Published Online: 14 December 2020
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RESEARCH ARTICLE
Vol. 33 (3) September 2021, p. 447-457

MOLECULAR CLONING OF Elaeis guineensis PHYTOENE SYNTHASE (Egpsy) AND ITS EXPRESSION IN MESOCARP TISSUES

WAN NUR SYUHADA, W S*; RASID, O A* and PARVEEZ, G K A*
DOI: https://doi.org/10.21894/jopr.2020.0113  |   Published Online: 17 December 2020
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RESEARCH ARTICLE
Vol. 33 (2) June 2021, p. 267-277

THE DYNAMIC OF CARBON DIOXIDE (CO₂) EMISSION AND LAND COVERAGE ON INTERCROPPING SYSTEM ON OIL PALM REPLANTING AREA

SRI AMBAR KUSUMAWATI*; SUDIRMAN YAHYA**; HARIYADI**; SRI MULATSIH‡ and IDA NUR ISTINA‡‡
DOI: https://doi.org/10.21894/jopr.2020.0114  |   Published Online: 28 December 2020
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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

HASIMAH MOS*,‡‡; MOHD HANIFF HARUN*; KHO LIP KHOON*; NUR MAISARAH JANTAN*; AFIFAH ABDUL RAZAK*; NUR AMANINA SHAHABUDDIN*; HASNOL OTHMAN*; NORMAN KAMARUDIN*; GHULAM KADIR AHMAD PARVEEZ*; AHMAD KUSHAIRI DIN*; PARAMANANTHAN SELLIAH**; NGAB DOLLAH SALAM‡ and YUSRI YUSUP‡‡
DOI: https://doi.org/10.21894/jopr.2020.0091  |   Published Online: 22 October 2020
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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

CALVIN TAN ZHE KHAI*; PATRICIA KING JIE HUNG**; SU CHONG MING**; HO KOK LIAN* and LAU WEI HONG‡
DOI: https://doi.org/10.21894/jopr.2020.0085  |   Published Online: 7 October 2020
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RESEARCH ARTICLE
Vol. 33 (2) June 2021, p. 235-247

ISOLATION AND CHARACTERISATION OF GIBBERELLIN 2-OXIDASE 6 GENE FROM OIL PALM (Elaeis guineensis Jacq.)

ZATTY SYAMIMI ADURA, M S*; NURNIWALIS, A W* and ZUBAIDAH, R*
DOI: https://doi.org/10.21894/jopr.2020.0066  |   Published Online: 22 September 2020
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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

GOGGIN, K A*; BRODRICK, E**; WICAKSONO, A‡; COVINGTON, J A‡; DAVIES, A N‡‡ and MURPHY, D J*
DOI: https://doi.org/10.21894/jopr.2021.0013  |   Published Online: 7 April 2021
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RESEARCH ARTICLE
Vol. 33 (3) September 2021, p. 436-446

OIL PALM MALE MEIOSIS PROFILING: FROM FIELD OBSERVATION TO CYTOGENETICS ANALYSIS

NORDIANA, H M N¹; MADON, M^1,2; SINGH, R1; SRITHARAN, K³; MUHAMMAD AZWAN, Z¹ and ZAKI, N M¹*
DOI: https://doi.org/10.21894/jopr.2020.0107  |   Published Online: 4 December 2020
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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

MOHD NAJIB AHMAD^1,2*; ABDUL RASHID MOHAMED SHARIFF²; ISHAK ARIS²; IZHAL ABDUL HALIN² and RAMLE MOSLIM¹
DOI: https://doi.org/10.21894/jopr.2020.0099  |   Published Online: 12 November 2020
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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)

MOHAMAD ROSMAN SULAIMAN¹*; SAHARUL ABILLAH MOHAMAD¹; MOHAMED MAZMIRA MOHD MASRI¹; SITI NURULHIDAYAH AHMAD¹ and NORMAN KAMARUDIN¹
DOI: https://doi.org/10.21894/jopr.2020.0095  |   Published Online: 27 October 2020
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RESEARCH ARTICLE
33 (2) June 2021, p. 215-226

SOIL FUNGAL COMPOSITION AND DIVERSITY IN OIL PALM PLANTATION AT SUNGAI ASAP, SARAWAK, MALAYSIA

SHARRON WONG*; FARAH MELISSA MUHARAM**; OSAMAH RASHED‡ and KHAIRULMAZMI AHMAD‡‡
DOI: https://doi.org/10.21894/jopr.2021.0014  |   Published Online: 15 April 2021
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RESEARCH ARTICLE
Vol. 33 (3) September 2021, p. 400-412

NEURAL NETWORKS METHOD IN PREDICTING OIL PALM FFB YIELDS FOR THE PENINSULAR STATES OF MALAYSIA

YOUSIF Y HILAL¹*; YAHYA, A²; ISMAIL, W I W² and ASHA’ARI, Z H³
DOI: https://doi.org/10.21894/jopr.2020.0105  |   Published Online: 25 November 2020
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REVIEW ARTICLE
Vol. 33 (1) March 2021, p. 1-11

MECHANISING OIL PALM LOOSE FRUITS COLLECTION – A REVIEW

MOHD RAMDHAN KHALID*; ABD RAHIM SHUIB* and NORMAN KAMARUDIN
DOI: https://doi.org/10.21894/jopr.2020.0069  |   Published Online: 22 September 2020
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SHORT COMMUNICATION
Vol. 33 (1) March 2021, p. 171-180

A REVIEW ON MALAYSIAN SUSTAINABLE PALM OIL CERTIFICATION PROCESS AMONG INDEPENDENT OIL PALM SMALLHOLDERS

PARTHIBAN KANNAN*; NUR HANANI MANSOR*; NAZIRA KHABIBOR RAHMAN*; TAN SAY PENG* and SITI MARIAM MAZLAN**
DOI: https://doi.org/10.21894/jopr.2020.0056  |   Published Online: 10 September 2020
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RESEARCH ARTICLE
Vol. 33 (1) March 2021, p. 151-170

LIFE CYCLE ASSESSMENT OF PALM OIL CLINKER AS A BINDER AND AGGREGATE REPLACEMENT IN CONCRETE

SAZNIZAM SAZMEE SINOH*; ZAINAH IBRAHIM* and FARIDAH OTHMAN*
DOI: https://doi.org/10.21894/jopr.2020.0081  |   Published Online: 7 October 2020
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RESEARCH ARTICLE
Vol. 33 (1) March 2021, p. 140-150

LIFE CYCLE ASSESSMENT FOR THE PRODUCTION OF PALM BIODIESEL

CHEE LIANG YUNG*,**, VIJAYA SUBRAMANIAM* and SUMIANI YUSOFF‡
DOI: https://doi.org/10.21894/jopr.2020.0080  |   Published Online: 7 October 2020
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RESEARCH ARTICLE
Vol. 33 (1) March 2021, p. 129-139

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

NUR HAQIM ISMAIL*; AZMIL HAIZAM AHMAD TARMIZI*; NORAZURA AILA MOHD HASSIM*; SIVARUBY KANAGARATNAM* and NOOR LIDA HABI MAT DIAN*
DOI: https://doi.org/10.21894/jopr.2020.0071  |   Published Online: 22 September 2020
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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

RADHIKA LOGANATHAN*; KANGA RANI SELVADURAY*; KALANITHI NESARETNAM*; AMMU KUTTY RADHAKRISHNAN**,‡
DOI: https://doi.org/10.21894/jopr.2020.0082  |   Published Online: 7 October 2020
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RESEARCH ARTICLE
Vol. 33 (1) March 2021, p. 103-118

POST-TREATMENT OF PALM OIL MILL EFFLUENT USING ZEOLITE AND WASTEWATER

HOSSEIN FARRAJI*,‡; REZA MOHAMMADPOUR*,** and NASTAEIN QAMARUZ ZAMAN*
DOI: https://doi.org/10.21894/jopr.2020.0077  |   Published Online: 5 October 2020
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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

NOR FAIZAH JALANI*; NOORSHAMSIANA ABDUL WAHAB*; WAN HASAMUDIN WAN HASSAN*; KAMARUDIN HASSAN*; NAHRUL HAYAWIN ZAINAL* and MOHAMAD FAIZAL IBRAHIM**
DOI: https://doi.org/10.21894/jopr.2020.0067  |   Published Online: 22 September 2020
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RESEARCH ARTICLE
Vol. 33 (1) March 2021, p. 84-92

USING TERRAIN ALGORITHMS ON A DIGITAL ELEVATION MODEL TO EVALUATE YIELD VARIABILITY IN OIL PALM

ALBERTO MARTINEZ*; JAMES J CAMBERATO*; PHILLIP OWENS** and JENETTE ASHTEKAR*
DOI: https://doi.org/10.21894/jopr.2020.0092  |   Published Online: 27 October 2020
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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

MUHAMMAD NOR ARIFIN YAAKOB*, RASIDI ROSLAN*, NURJANNAH SALIM*, SITI NOOR HIDAYAH MUSTAPHA*, SARANI ZAKARIA**, CHIN-HUA CHIA** and MOHD SHAIFUL SAJAB***
DOI: https://doi.org/10.21894/jopr.2020.0076  |   Published Online: 5 October 2020
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RESEARCH ARTICLE
Vol. 33 (1) March 2021, p. 64-73

PERFORMANCE EVALUATION OF A MOTORISED PALM OIL EXTRACTOR WITH QUALITY ASSESSMENT OF THE PALM OIL EXTRACTED IN COMPARISON WITH A MANUAL VERTICAL PRESS

NICHOLAS KIGGUNDU* and JOSEPH JJAGWE*
DOI: https://doi.org/10.21894/jopr.2020.0096  |   Published Online: 4 November 2020
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RESEARCH ARTICLE
Vol. 33 (1) March 2021, p. 56-63

HERBICIDE EFFECTS ON Ganoderma boninense INFECTION IN OIL PALM SEEDLINGS

SITI HAZLINA HUSSIN*; IDRIS ABU SEMAN**; MOHD HEFNI RUSLI**; MAIZATUL SURIZA MOHAMED** and ZAITON SAPAK*,#
DOI: https://doi.org/10.21894/jopr.2020.0070  |   Published Online: 22 September 2020
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RESEARCH ARTICLE
Vol. 33 (1) March 2021, p. 46-55

ESTIMATING THE YIELD LOSS OF OIL PALM DUE TO Ganoderma BASAL STEM ROT DISEASE BY USING BAYESIAN MODEL AVERAGING

ASSIS KAMU*; CHONG KHIM PHIN**; IDRIS ABU SEMAN‡; DARMESAH GABDA* and HO CHONG MUN*
DOI: https://doi.org/10.21894/jopr.2020.0061  |   Published Online: 11 September 2020
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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

SU CHONG MING*; PATRICIA KING JIE HUNG*; KWAN YEE MING*; ZAKRY FITRI AB AZIZ* and ONG KIAN HUAT*
DOI: https://doi.org/10.21894/jopr.2020.0090  |   Published Online: 21 October 2020
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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

SAHARUL ABILLAH MOHAMAD*,**; MUHAMMAD NURUL YAQIN SYARIF*; SITI NURULHIDAYAH AHMAD*; MOHAMED MAZMIRA MOHD MASRI*; KING JIE HUNG** and NORMAN KAMARUDIN*
DOI: https://doi.org/10.21894/jopr.2020.0075  |   Published Online: 8 October 2020
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