REVIEW ARTICLE
Vol. 38 (2) June 2026, p. 201-228

OIL PALM ECONOMIC PERFORMANCE IN MALAYSIA AND R&D PROGRESS IN 2025

GHULAM KADIR AHMAD PARVEEZ¹*; CHIEW WEI PUAH¹; SAY PENG TAN¹; ZULKIFLI YAAKUB¹; HALIZA ABD. AZIZ¹; MOHAMAD AZRI SUKIRAN¹; PUVANESWARI MEGANATHAN¹; HUMAIRA MAT TAIB¹ and RAMLE MOSLIM¹
DOI: https://doi.org/10.21894/jopr.2026.0029  |   Published Online: 26 June 2026
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RESEARCH ARTICLE
Vol. 38 (2) June 2026, p. 362-375

PHOTOCATALYTIC DEGRADATION OF ANAEROBIC TREATED PALM OIL MILL EFFLUENT BY MODIFIED ZnO WITH LEMONGRASS AND KINETIC STUDIES

DILAELEYANA ABU BAKAR SIDIK¹*; NUR HANIS HAYATI HAIROM^2,3; AIDA MUHAMMAD¹; NORASIKIN OTHMAN^4,5; NORELA JUSOH⁴; SITI FATIMAH MOHD NOOR¹; HAFSA MOHAMMAD NOOR¹ and DZULHILMI KAMARUDIN SOHAMI⁶
DOI: https://doi.org/10.21894/jopr.2025.0037  |   Published Online: 23 July 2025
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SHORT COMMUNICATION
Vol. 38 (2) June 2026, p. 384-390

PROCESSING OF UNDER AND OVERRIPE OIL PALM FRUITS AND ITS EFFECTS ON YIELD AND OIL QUALITY

MUHAMAD RODDY RAMLI¹*; ABDUL NIEFAIZAL ABDUL HAMMID¹ and ZULKIFLI YAAKUB¹
DOI: https://doi.org/10.21894/jopr.2025.0033  |   Published Online: 8 July 2025
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RESEARCH ARTICLE
Vol. 38 (2) June 2026, p. 346-361

EVALUATION OF LAMINATED PANELS FROM SEMANTAN BAMBOO AND OIL PALM TRUNKS FOR SUSTAINABLE COMPOSITE MANUFACTURING

BALKIS FATOMER A. BAKAR^1,2*; YAP XIA JIAN¹; NURUL AIDA OTHMAN¹; AISYAH HUMAIRA ALIAS³; ALIA SYAHIRAH YUSOF⁴ and MOHD KHAIRUN ANWAR UYUP⁴
DOI: https://doi.org/10.21894/jopr.2025.0032  |   Published Online: 8 July 2025
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REVIEW ARTICLE
Vol. 37 (2) June 2025, p. 187-208

OIL PALM ECONOMIC PERFORMANCE IN MALAYSIA AND R&D PROGRESS IN 2024

GHULAM KADIR AHMAD PARVEEZ¹*; RAZMAH GHAZALI¹; NUR AIN MOHD HASSAN¹; AHMAD ZAIRUN MADIHAH¹; ABRIZAH OTHMAN¹; PARTHIBAN KANNAN¹; TEH SOEK SIN¹; VOON PHOOI TEE¹; ZAINAB IDRIS¹ and RAMLE MOSLIM¹
DOI: https://doi.org/10.21894/jopr.2025.0031  |   Published Online: 13 June 2025
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RESEARCH ARTICLE
Vol. 38 (2) June 2026, p. 307-315

IMPROVING OIL PALM BREEDING EFFICIENCY VIA MIXED POLLINATION AND PATERNITY DETERMINATION USING SINGLE NUCLEOTIDE POLYMORPHISM (SNP) PANEL

ZULKIFLI YAAKUB¹*; SUZANA MUSTAFFA¹; MARHALIL MARJUNI¹; FATIN MOHD NASIR¹; WAN NOR SALMIAH TUN MOHD SALIM¹; TING NGOOT CHIN¹; JAAP BUNTJER²; JARED ORDWAY² and RAJINDER SINGH¹
DOI: https://doi.org/10.21894/jopr.2025.0026  |   Published Online: 18 April 2025
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RESEARCH ARTICLE
Vol. 38 (2) June 2026, p. 338-345

CHEMICAL PROPERTIES AND BIOCOMPATIBILITY OF MICROCRYSTALLINE CELLULOSE REINFORCED DENTURE BASE RESIN MATERIAL: AN In Vitro STUDY

JACOB JOHN^1,6*; AMIRA ALI ABDEL RAHAMAN ALI²; SHANI ANN MANI³; ARIEF CAHYANTO^1,7; AEMAN HH ELKEZZA¹; FATIHA ISMAIL⁴ and AIED MOHAMMED ALABASI⁵
DOI: https://doi.org/10.21894/jopr.2025.0023  |   Published Online: 28 March 2025
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RESEARCH ARTICLE
Vol. 38 (2) June 2026, p. 326-337

STUDY OF THE ANATOMICAL STRUCTURE ALONG THE OIL PALM FRUIT BUNCH STALK AND ITS IMPACT ON CUTTING PRESSURE

AZHAR ARIFF¹; CHONG WU YI¹*; HARITH AHMAD¹; MOHAMMAD FAISAL ISMAIL¹; WAN RUSYDIAH WAN RUSIK²; BATRISYIA AHMAD NAZRI³; AMIRUL AL HAFIZ ABDUL HAMID⁴; HARIKRISHNA KULAVEERASINGAM⁴; MOHAMMAD ZULFAHMI MOHAMMAD YUSOFF⁴ and MOHAMMAD SHIRAZ ARIS⁴
DOI: https://doi.org/10.21894/jopr.2025.0022  |   Published Online: 28 March 2025
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RESEARCH ARTICLE
Vol. 38 (2) June 2026, p. 316-325

CONSERVATION OF PREDATORY ANTS Myopopone castanea SMITH (HYMENOPTERA: FORMICIDAE) IN AN OIL PALM PLANTATION IN NORTH SUMATERA

MARYANI CYCCU TOBING¹*; LISNAWITA¹ and WIDIHASTUTY²*
DOI: https://doi.org/10.21894/jopr.2025.0021  |   Published Online: 28 March 2025
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REVIEW ARTICLE
Vol. 38 (2) June 2026, p. 229-249

PARADIGMS AND KNOWLEDGE GAPS IN OIL PALM STEM ROTS CAUSED BY Ganoderma

JULIE FLOOD¹*; PAUL BRIDGE¹ and CARMEL PILOTTI²
DOI: https://doi.org/10.21894/jopr.2025.0020  |   Published Online: 28 March 2025
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SHORT COMMUNICATION
Vol. 38 (1) March 2026, p. 190-200

GC/Q-TOF-MS-BASED METABOLOMICS: UNVEILING THE TEMPORAL METABOLIC PATHWAYS IN Ganoderma boninense USING PATHWAY ANALYSIS TOOLS

ZAIN NURAZAH¹*; NUR AIN ISHAK¹; NURUL LIYANA ROZALI¹; SHAHIRAH BALQIS DZULKAFLI¹; JAYANTHI NAGAPPAN¹; SHAMALA SUNDRAM¹; ABU SEMAN IDRIS¹ and ABRIZAH OTHMAN¹
DOI: https://doi.org/10.21894/jopr.2025.0019  |   Published Online: 26 March 2025
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RESEARCH ARTICLE
Vol. 38 (2) June 2026, p. 296-306

TRUE-TO-TYPE VERSION 2 – HIGH RESOLUTION GENOTYPING PLATFORM FOR PARENTAL IDENTIFICATION IN OIL PALM

TING NGOOT-CHIN¹; LESLIE LOW ENG-TI¹; JAAP BUNTJER²; MEILINA ONG-ABDULLAH¹; CHAN PEK-LAN¹; ZULKIFLI YAAKUB¹; JARED ORDWAY² and RAJINDER SINGH¹*
DOI: https://doi.org/10.21894/jopr.2025.0018  |   Published Online: 25 March 2025
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RESEARCH ARTICLE
Vol. 38 (2) June 2026, p. 250-261

ESTIMATING INSECT PEST CONSUMPTION BY THE ORIENTAL MAGPIE-ROBIN AND YELLOW-VENTED BULBUL IN OIL PALM PLANTATIONS FROM A FEEDING EXPERIMENT

MUHAMMAD SYAFIQ YAHYA¹; DZULHELMI MUHAMMAD NASIR²; HELDA TANGINANG³; KAMIL TOHIRAN⁴; AHMAD AFANDI MURDI⁴; SYARI JAMIAN⁵; AHMAD RAZI NORHISHAM¹; ALEX M LECHNER⁶ and BADRUL AZHAR^1,7,8*
DOI: https://doi.org/10.21894/jopr.2025.0017  |   Published Online: 19 March 2025
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RESEARCH ARTICLE
Vol. 38 (2) June 2026, p. 282-295

SOIL CHARACTERISTICS INFLUENCE THE DISTRIBUTION OF BORON FRACTIONS IN SOILS OF OIL PALM PLANTATIONS

PREMALATHA, R P¹*; MANORAMA, K¹; SURESH, K¹ and RAMACHANDRUDU, K¹
DOI: https://doi.org/10.21894/jopr.2025.0016  |   Published Online: 19 March 2025
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RESEARCH ARTICLE
Vol. 38 (2) June 2026, p. 376-383

SMALL SCALE FIELD EVALUATION OF A NOVEL PALM-BASED INSECTICIDE FORMULATION USING COLD AND THERMAL FOGGING AGAINST Aedes aegypti

SUMAIYAH MEGAT NABIL MOHSIN¹*; NORASHIKIN AHMAD¹ and YUSRABBIL AMIYATI YUSOF¹
DOI: https://doi.org/10.21894/jopr.2025.0015  |   Published Online: 19 March 2025
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 741-750

DIETARY INCLUSION OF CRUDE PALM OIL, RED PALM OIL, REFINED PALM OIL, PALM KERNEL OIL AND SOYBEAN OIL ON MODULATION OF INTESTINAL BARRIER INTEGRITY AND IMMUNITY IN LAYING HENS

WAN IBRAHIM IZUDDIN¹; TECK CHWEN LOH^1,2*; NAZRI NAYAN^1,2; HOOI LING FOO^3,4 and HENNY AKIT^1,4
DOI: https://doi.org/10.21894/jopr.2025.0014  |   Published Online: 7 March 2025
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REVIEW ARTICLE
Vol. 38 (1) March 2026, p. 35-52

PRECISION AGRICULTURE IMPLEMENTATION TO IMPROVE SUSTAINABILITY AND PRODUCTIVITY OF OIL PALM PLANTATIONS IN INDONESIA: A REVIEW

HASBI MUBARAK SUUD¹*; ANGGA DEFRIAN²; AGUNG NUGROHO PUSPITO³ and AGUS SUSANTO GINTING⁴
DOI: https://doi.org/10.21894/jopr.2025.0013  |   Published Online: 5 March 2025
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RESEARCH ARTICLE
Vol. 38 (1) March 2026, p. 155-165

PERFORMANCE OF B10/B20 USAGE IN HEAVY-DUTY DIESEL VEHICLES

DARYL JAY THADDEUS¹*; HARRISON LAU LIK NANG¹; NURSYAIRAH JALIL¹; NUR SULIHATIMARSYILA ABD WAFTI¹; ASTIMAR ABDUL AZIZ¹; CHENG XINWEI ²; GAN SUYIN ² and NG HOON KIAT ²
DOI: https://doi.org/10.21894/jopr.2025.0012  |   Published Online: 5 March 2025
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RESEARCH ARTICLE
Vol. 38 (1) March 2026, p. 88-98

EVALUATION OF DIFFERENT SEED DORMANCY BREAKING METHODS INCLUDING ENZYMATIC ASSAYS FOR GERMINATION IMPROVEMENT IN OIL PALM (Elaeis guineensis Jacq.)

MOHD NORSAZWAN GHAZALI¹*; UMA RANI SINNIAH¹ and PARAMESWARI NAMASIVAYAM²
DOI: https://doi.org/10.21894/jopr.2025.0011  |   Published Online: 3 March 2025
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RESEARCH ARTICLE
Vol. 38 (1) March 2026, p. 166-173

SYNTHESIS OF LAURIC-RICH MEDIUM-CHAIN TRIGLYCERIDES FROM PALM KERNEL OIL AND LAURIC ACID BY ENZYMATIC ACIDOLYSIS

AGNES IMELDA MANURUNG¹; ELISA JULIANTI¹*; JANSEN SILALAHI² and DONALD SIAHAAN³
DOI: https://doi.org/10.21894/jopr.2025.0010  |   Published Online: 21 February 2025
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RESEARCH ARTICLE
Vol. 38 (2) June 2026, p. 272-281

APPLICATION OF OLD OIL PALM TRUNKS AFFECTS THE GROWTH PERFORMANCE OF OIL PALM SEEDLINGS

AYAKA UKE¹*; ALISA HANIS²; KUMAR SUDESH² and AKIHIKO KOSUGI^1,3*
DOI: https://doi.org/10.21894/jopr.2025.0009  |   Published Online: 20 February 2025
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RESEARCH ARTICLE
Vol. 37 (3) September 2025, p. 533-548

BIODIESEL PRODUCTION FROM PALM STEARIN PROCESS OPTIMISATION USING RESPONSE SURFACE METHODOLOGY (RSM)

P. GOWTHAM¹*; K. PITCHANDI² and V. MANIENIYAN¹
DOI: https://doi.org/10.21894/jopr.2025.0008  |   Published Online: 20 February 2025
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RESEARCH ARTICLE
Vol. 38 (2) June 2026, p. 262-271

In Planta EFFICACY OF LOCAL Trichoderma ISOLATES AND SELECTED COMMERCIAL BIOLOGICAL AGENTS AGAINST Ganoderma boninense IN OIL PALM

JUMIATI ASIS¹; NUR AAINAA HASBULLAH¹; MOHAMADU BOYIE JALLOH¹; PALANIVELL PERUMAL^2,3; PETER MOJIUN² and MOHD RASHID MOHD RAKIB¹*
DOI: https://doi.org/10.21894/jopr.2025.0007  |   Published Online: 19 February 2025
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RESEARCH ARTICLE
Vol. 38 (1) March 2026, p. 174-189

DELVING INTO THE SYNERGISTIC BEHAVIOURS OF TRIBOLOGICAL ADDITIVES IN MINERAL AND VEGETABLE OILS VIA THERMODYNAMIC ANALYSIS

CHUNG-HUNG CHAN¹*; AHMAD SYAFIQ AHMAD HAZMI¹; NOOR KHAIRIN MOHD¹; WEN HUEI LIM¹ and SIN YEE GAN¹
DOI: https://doi.org/10.21894/jopr.2025.0006  |   Published Online: 19 February 2025
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RESEARCH ARTICLE
Vol. 38 (1) March 2026, p. 99-116

PRICE TRANSMISSION IN THE SUPPLY CHAIN OF INDEPENDENT OIL PALM SMALLHOLDERS IN WEST SUMATERA, INDONESIA: A CASE STUDY IN DHARMASRAYA DISTRICT

LISA NESTI¹*; KHAIRUN NADIYAH² and AHMAD FUDHOLI^3,4
DOI: https://doi.org/10.21894/jopr.2025.0005  |   Published Online: 19 February 2025
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RESEARCH ARTICLE
Vol. 38 (1) March 2026, p. 147-154

DUAL APPLICATION OF PALM OIL MILL EFFLUENT (POME) AND BENEFICIAL MICROBE ISOLATES FOR Oryza sativa GROWTH UNDER GLASS HOUSE CONDITION

NURUL AIN NAJIHAH MUSA¹; NUR MAIZATUL IDAYU OTHMAN^1,2*; AIDA SORAYA SHAMSUDDIN³; MAISARAH ABDUL MUTALIB⁴; NUR ADIBAH ROSLAN¹; NUR AZALINA SUZIANTI FEISAL⁵ and NOR AZMA YUSUF¹
DOI: https://doi.org/10.21894/jopr.2025.0004  |   Published Online: 19 February 2025
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RESEARCH ARTICLE
Vol. 38 (1) March 2026, p. 127-135

A PRELIMINARY EVALUATION OF A RADIO-CONTROLLED HYDROSTATIC TRANSMISSION MOWER FOR OIL PALM PLANTATION

MOHD AZWAN BAKRI¹*; NABILAH KAMALIAH MUSTAFFA¹ and MOHD RIZAL AHMAD¹
DOI: https://doi.org/10.21894/jopr.2025.0003  |   Published Online: 19 February 2025
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 729-740

EFFECTS OF DRYING TECHNIQUES ON PHENOLICS CONTENT AND ANTIOXIDANT ACTIVITY OF WATER-SOLUBLE PALM FRUIT EXTRACT

MOHAMAD DAYOOB^1,3*; SOON-SEN LEOW²; KAH-HAY YUEN¹ and NURZALINA A K KHAN¹
DOI: https://doi.org/10.21894/jopr.2025.0002  |   Published Online: 23 January 2025
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RESEARCH ARTICLE
Vol. 38 (1) March 2026, p. 136-146

BIO-OIL AND BIO-HYDROGEN PRODUCTION USING RED MUD CATALYST FROM OIL PALM BIOMASS WASTE

ARIF HIDAYAT¹*; CHOLILA TAMZYSI¹ and MUFLIH ARISA ADNAN¹
DOI: https://doi.org/10.21894/jopr.2025.0001  |   Published Online: 7 January 2025
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RESEARCH ARTICLE
Vol. 38 (1) March 2026, p. 117-126

MATERIAL AND CURVATURE OF THE OIL PALM HARVESTING KNIFE AND THEIR EFFECTS ON FORCE AND ENERGY REQUIREMENTS

SUTHAKAR B¹*; JANY GILES A¹ and DINESH PANDI M¹
DOI: https://doi.org/10.21894/jopr.2024.0059  |   Published Online: 20 December 2024
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RESEARCH ARTICLE
Vol. 38 (1) March 2026, p. 65-77

ANTIFUNGAL ACTIVITY OF ETHANOLIC EXTRACT FROM INDIGENOUS BACTERIUM Bacillus subtilis STRAIN MN704394.1 CULTURE CONTAINING EICOSANE AND ETHYL STEARATE AGAINST Ganoderma boninense

BEDAH RUPAEDAH¹*; RAISADIBA PUTRI BOVANI²; INDRI HANDAYANI¹; ZHAFIRA AMILA HAQQA¹ and CATUR SRIHERWANTO¹
DOI: https://doi.org/10.21894/jopr.2024.0058  |   Published Online: 20 December 2024
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RESEARCH ARTICLE
Vol. 38 (1) March 2026, p. 78-87

THE USE OF FACTORIAL MATING DESIGN FOR ESTIMATION OF COMBINING ABILITIES IN COMMERCIAL OIL PALMS

PATCHARIN TANYA¹; PUNTAREE TAEPRAYOON²; SURAKITTI SRIKUL³; ANEK LIMSRIVILAI⁴ and PEERASAK SRINIVES^1,5*
DOI: https://doi.org/10.21894/jopr.2024.0057  |   Published Online: 20 December 2024
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 719-728

INSIGHT INTO FATTY ACID-AMINO ACIDS INTERACTIONS IN LIPASE ENZYME CATALYSIS OF TRANSESTERIFICATION REACTION OF PALM OIL USING DENSITY FUNCTIONAL THEORY B3LYP 6-31G(D,P)

RADIAH ALI¹; ALYZA AZZURA AZMI¹ and SABIQAH TUAN ANUAR¹*
DOI: https://doi.org/10.21894/jopr.2024.0056  |   Published Online: 27 November 2024
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 646-657

MULTIDIMENSIONAL ANALYSIS SUSTAINABILITY OF CORN-SOYBEAN INTERCROPPING MODEL IN SMALLHOLDER OIL PALM REPLANTING

SRI AMBAR KUSUMAWATI¹; AGUSTINUS N KAIRUPAN²*; RACHMIWATI YUSUF³; NURHAYATI⁴; IDA NUR ISTINA⁵; F FATHURRAHMAN⁵; HERY WIDYANTO⁶; PARLIN HALOMOAN SINAGA³; TENGKU HARUNUR RASYID⁷ and MEVIE LINTANG⁸
DOI: https://doi.org/10.21894/jopr.2024.0055  |   Published Online: 27 November 2024
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REVIEW ARTICLE
Vol. 38 (1) March 2026, p. 1-34

CLIMATE VARIABILITY AND WATER STRESS EFFECTS ON OIL PALM (Elaeis guineensis Jacq.) PRODUCTIVITY IN MALAYSIA

SANI IDRIS^1,2; CHRISTOPHER TEH BOON SUNG¹*; SYAHARUDIN ZAIBON¹ and SIM CHOON CHEAK³
DOI: https://doi.org/10.21894/jopr.2024.0054  |   Published Online: 26 November 2024
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SHORT COMMUNICATION
Vol. 37 (3) September 2025, p. 573-580

BIRD FUNCTIONAL GROUPS CAN REDUCE INSECT PESTS IN OIL PALM SMALLHOLDINGS IN RUPAT ISLAND, RIAU PROVINCE, INDONESIA

DIMAS HARYO PRADANA¹; MUFTI PETALA PATRIA¹; YASMAN¹ and NURUL LAKSMI WINARNI²*
DOI: https://doi.org/10.21894/jopr.2024.0053  |   Published Online: 26 November 2024
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SHORT COMMUNICATION
Vol. 37 (2) June 2025, p. 370-376

THE FIRST RECORD OF THE WHITE-THROATED KINGFISHER, Halcyon smyrnensis, BREEDING IN BORNEO, INDONESIA

MUHAMMAD SILMI¹; MAHFUD HUDA¹; ALI AMRAN¹; SURYADI¹; MISLAN¹; FILA ISTINA MACHID¹; ALDINO FAUZIL FANANI¹; AGUSTINA KRISTIN HANDAYANI¹ and CARL TRAEHOLT²*
DOI: https://doi.org/10.21894/jopr.2024.0052  |   Published Online: 19 November 2024
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SHORT COMMUNICATION
Vol. 37 (4) December 2025, p. 751-756

MOLECULAR IDENTIFICATION OF A MEALYBUG SPECIES (HEMIPTERA: PSEUDOCOCCIDAE) INFESTING AN OIL PALM PLANTATION IN TAWAU, SABAH

NURHAFIZHOH ZAINUDDIN¹*; MUHAMMAD NURUL YAQIN SYARIF¹; SHAMSILAWANI AHAMED BAKERI¹; ZAHIDAH AYOB¹ and MOHAMED MAZMIRA MOHD MASRI¹
DOI: https://doi.org/10.21894/jopr.2024.0051  |   Published Online: 8 November 2024
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RESEARCH ARTICLE
Vol. 38 (1) March 2026, p. 53-64

GENETIC DIVERSITY OF MPOB-ZAIRE OIL PALM (Elaeis guineensis Jacq.) GERMPLASM POPULATION BY MULTIVARIATE ANALYSIS

FATIN MOHD NASIR¹; SUZANA MUSTAFFA¹; MARHALIL MARJUNI¹; WAN NOR SALMIAH TUN MOHD SALIM¹ and ZULKIFLI YAAKUB¹*
DOI: https://doi.org/10.21894/jopr.2024.0050  |   Published Online: 8 November 2024
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RESEARCH ARTICLE
Vol. 37 (3) September 2025, p. 560-572

ENVIRONMENTAL ASSESSMENT OF FATTY ACIDS PRODUCTION FROM PALM OIL USING LIFE CYCLE APPROACH

NOORAZAH ZOLKARNAIN¹*; ZULINA ABD MAURAD¹; VIJAYA SUBRAMANIAM¹ and RAZMAH GHAZALI¹
DOI: https://doi.org/10.21894/jopr.2024.0049  |   Published Online: 8 November 2024
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REVIEW ARTICLE
Vol. 37 (4) December 2025, p. 581-597

PREVALENCE OF WORK-RELATED MUSCULOSKELETAL DISORDERS (WMSDs) AND RECENT INITIATIVES TO ADDRESS THEM IN THE OIL PALM INDUSTRY: A SYSTEMATIC REVIEW

‘UMAR MOHAMAD NOOR¹ and MOHAMAD IKHWAN ZAINI RIDZWAN¹*
DOI: https://doi.org/10.21894/jopr.2024.0048  |   Published Online: 17 October 2024
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 696-706

ENCAPSULATED ACIDIC ASPIRIN-BASED EUTECTIC SOLVENTS FOR ESTERIFICATION OF FREE FATTY ACID

ADEEB HAYYAN^1,2*; JIAN LING LEONG¹; ANDREW T H YEOW^1,2; HANEE F. HIZADDIN^1,2; YOUSEF MOHAMMED ALANAZI³; JEHAD SALEH³; BARUN KUMAR CHAKRABARTI⁴; CHEE TONG JOHN LOW⁵ and SHARIFAH SHAHIRA SYED PUTRA¹
DOI: https://doi.org/10.21894/jopr.2024.0047  |   Published Online: 30 September 2024
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 627-634

LIFE CYCLE, FOLIAR CONSUMPTION RATE, NATURAL ENEMIES AND POPULATION FLUCTUATION OF Phobetron hipparchia CRAMER, 1777 (LEPIDOPTERA: LIMACODIDAE): AN EMERGING PEST OF OIL PALM IN COLOMBIA

CARLOS ENRIQUE BARRIOS-TRILLERAS¹; ROBERTO JOSÉ DIAZ-CASTRO¹; LEIDY JOHANNA CONTRERAS-ARIAS¹ and ANUAR MORALES-RODRÍGUEZ¹*
DOI: https://doi.org/10.21894/jopr.2024.0046  |   Published Online: 20 September 2024
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 684-695

A BIOMECHANICAL ANALYSIS ON WORKRELATED MUSCULOSKELETAL DISORDERS USING A MECHANISED CHAINSAW FOR OIL PALM HARVESTING

UMESH GANESH¹; ZAIDI MOHD RIPIN¹; WAN MOHD AMRI WAN MAMAT ALI¹; YEO YING HENG¹; MITCHELLE LAW JYY JINN¹; JEEVINTHIRAN KARUNAGARAN¹ and MOHAMAD IKHWAN ZAINI RIDZWAN¹*
DOI: https://doi.org/10.21894/jopr.2024.0045  |   Published Online: 19 September 2024
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 707-718

INVESTIGATION ON MECHANICAL AND CORROSION CHARACTERISTICS OF ASME SA 516 GRADE 70 CARBON STEEL USED IN A BIODIESEL STORAGE FACILITY

NUR NAQIUDDIN MDD NORDIN¹*; MOHD NASHRUL MOHD ZUBIR¹*; SALIM NEWAZ KAZI¹ and NURIN WAHIDAH MOHD ZULKIFLI¹
DOI: https://doi.org/10.21894/jopr.2024.0044  |   Published Online: 9 September 2024
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RESEARCH ARTICLE
Vol. 37 (3) September 2025, p. 476-491

A COMPREHENSIVE ASSESSMENT OF COMPOSITION AND NUTRIENT CONTENT IN VARIOUS COMMERCIAL FERTILISERS USED IN INDONESIAN OIL PALM PLANTATIONS

SUKARMAN^1,2; LILIK SUTIARSO¹*; ANDRI PRIMA NUGROHO¹; ARDAN WIRATMOKO¹; TAKASHI OKAYASU³; SUWARDI^1,4; SEPTA PRIMANANDA⁵; AHMAD HASANUDDIN⁴ and HERRY WIRIANATA⁵
DOI: https://doi.org/10.21894/jopr.2024.0043  |   Published Online: 5 September 2024
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RESEARCH ARTICLE
Vol. 37 (3) September 2025, p. 519-532

SULPHONIC ACIDS SUPPORTED ON Fe₃O₄/PVA MAGNETIC COMPOSITE AS CATALYSTS FOR ESTERIFICATION OF FREE FATTY ACIDS

ANDREW T. H. YEOW^1,2; ADEEB HAYYAN^1,2*; MOHD USMAN MOHD JUNAIDI^1,2; MUNEER M. BA-ABBAD³ and MOHD ALI HASHIM¹
DOI: https://doi.org/10.21894/jopr.2024.0042  |   Published Online: 4 September 2024
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 670-683

SEPARATION AND THERMAL MODIFICATION OF MONTMORILLONITE FROM TANAH DATAR CLAY AND ITS CATALYTIC APPLICATION IN BIODIESEL PRODUCTION FROM WASTE FRYING OILS

ZARNIDA WIDIA NENGSIH¹; RAHAYU RAHAYU¹; SYUKRI ARIEF¹; UPITA SEPTIANI¹; MATLAL FAJRI ALIF¹ and SYUKRI SYUKRI¹*
DOI: https://doi.org/10.21894/jopr.2024.0041  |   Published Online: 2 September 2024
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SHORT COMMUNICATION
Vol. 37 (1) March 2025, p. 181-186

DEVELOPMENT OF qPCR PRIMER FOR Ganoderma boninense DETECTION IN SOIL

HUN JIAT, TUNG¹*; YIT KHENG, GOH¹ and WEI CHEE, WONG¹
DOI: https://doi.org/10.21894/jopr.2024.0040  |   Published Online: 28 August 2024
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 635-645

GENOME SURVEY AND PRELIMINARY GENOMIC CHARACTERISATION OF A KEY OIL PALM POLLINATOR, Elaeidobius kamerunicus

NABEEL ATA¹; MOHD AMIN AB HALIM¹; MUHAMMAD NURUL YAQIN SYARIF¹; SAHARUL ABILLAH MOHAMAD¹; MUHAMMAD DZULHELMI MUHAMMAD NASIR²; SIEW-ENG OOI¹ and MEILINA ONG-ABDULLAH¹*
DOI: https://doi.org/10.21894/jopr.2024.0039  |   Published Online: 21 August 2024
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REVIEW ARTICLE
Vol. 37 (4) December 2025, p. 598-616

GREENING THE PALM OIL INDUSTRY: PROSPECTS AND BARRIERS OF SUPERCRITICAL CO₂ EXTRACTION

DWILA NUR RIZKIYAH¹; NICKY RAHMANA PUTRA^1,2; LAILATUL QOMARIYAH³*; MOHD AZIZI CHE YUNUS¹; HASMADI MAMAT^4,5; AHMAD HAZIM ABDUL AZIZ^4,5; JUMAKIR JUMAKIR⁶; WALUYO WALUYO⁶ and SUPARWOTO SUPARWOTO⁶
DOI: https://doi.org/10.21894/jopr.2024.0038  |   Published Online: 3 July 2024
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REVIEW ARTICLE
Vol. 36 (2) June 2024, p. 171-186

OIL PALM ECONOMIC PERFORMANCE IN MALAYSIA AND R&D PROGRESS IN 2023

GHULAM KADIR AHMAD PARVEEZ¹*; SOON-SEN LEOW¹; NUR NADIA KAMIL¹; AHMAD ZAIRUN MADIHAH¹; MAIZURA ITHNIN¹; MEI HAN NG¹; YUSRABBIL AMIYATI YUSOF¹ and ZAINAB IDRIS¹
DOI: https://doi.org/10.21894/jopr.2024.0037  |   Published Online: 27 June 2024
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RESEARCH ARTICLE
Vol. 37 (3) September 2025, p. 461-475

DISTINCT GENE CLUSTERS ARE EXPRESSED IN OIL PALM LEAF AND ROOT TISSUES IN RESPONSE TO DROUGHT STRESS

TISHA MELIA^{1 *}; FATAYAT¹ ; SUKAMTO¹ and RIKI ARIO NUGROHO¹
DOI: https://doi.org/10.21894/jopr.2024.0036  |   Published Online: 21 June 2024
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RESEARCH ARTICLE
Vol. 37 (3) September 2025, p. 451-460

MOLECULAR CHARACTERISATION OF OIL PALM (Elaeis guineensis Jacq.) HYBRIDS

ROJA RAMANI, G¹*; KALPANA, M¹; VENKATSWAMI, D¹ and KALYANABABU, B²
DOI: https://doi.org/10.21894/jopr.2024.0035  |   Published Online: 11 June 2024
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RESEARCH ARTICLE
Vol. 37 (3) September 2025, p. 441-450

ALUMINIUM TOXICITY TOLERANCE OF DIFFERENT VARIETIES OF OIL PALM (Elaeis guineensis L. Jacq) SEEDLINGS

HUSEIN ABDUL GANI¹; NURAZMIUDDIN BACHO¹ and NUR QURSYNA BOLL KASSIM²*
DOI: https://doi.org/10.21894/jopr.2024.0034  |   Published Online: 10 June 2024
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REVIEW ARTICLE
Vol. 37 (3) September 2025, p. 397-420

ENHANCING CORROSION RESISTANCE IN BIODIESEL DISTRIBUTION AND TERMINAL OPERATIONS: A COMPREHENSIVE MATERIALS COMPATIBILITY REVIEW

NUR NAQIUDDIN MDD NORDIN^{1 *}; MOHD NASHRUL MOHD ZUBIR^{1 *}; SALIM NEWAZ KAZI¹ and NURIN WAHIDAH MOHD ZULKIFLI¹
DOI: https://doi.org/10.21894/jopr.2024.0033  |   Published Online: 27 May 2024
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 658-669

QUANTIFYING THE EFFECT OF FERTILISER APPLICATION ON NITROUS OXIDE PULSES IN OIL PALM PLANTATION

NORLIYANA ZIN ZAWAWI¹*; KHO LIP KHOON²; AHMAD AFANDI MURDI¹ and TEH YIT ARN³
DOI: https://doi.org/10.21894/jopr.2024.0032  |   Published Online: 14 May 2024
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RESEARCH ARTICLE
Vol. 37 (4) December 2025, p. 617-626

EFFECT OF PLANTING DENSITY, PROGENY LINEAGE AND NITROGEN FERTILISER ON OIL PALM PERFORMANCE ON ALLUVIAL SOIL

AFANDI, A M¹; NORLIYANA, Z Z¹*; NORDIANA, A A¹; MARHALIL, M¹; MEILINA, O A¹; FARAWAHIDA, M D¹ and HALIMATUL, S A¹
DOI: https://doi.org/10.21894/jopr.2024.0031  |   Published Online: 14 May 2024
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RESEARCH ARTICLE
Vol. 37 (3) September 2025, p. 506-518

EVALUATING THE EFFECT OF LOW AND HIGH TEMPERATURE MODE OF SUBCRITICAL WATER PRE-TREATED EMPTY FRUIT BUNCHES ON CO-DIGESTION PERFORMANCE AND KINETIC STUDY FOR METHANE PRODUCTION

ADILA FAZLIYANA AILI HAMZAH¹; MUHAMMAD HAZWAN HAMZAH^1,2*; KHAIRUDIN NURULHUDA^1,2; HASFALINA CHE MAN^1,2; MUHAMMAD HEIKAL ISMAIL³ and PAU LOKE SHOW^4,5,6,7
DOI: https://doi.org/10.21894/jopr.2024.0030  |   Published Online: 8 May 2024
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RESEARCH ARTICLE
Vol. 37 (2) June 2025, p. 359-369

SPECIES IDENTIFICATION OF THE FATTY ACID COMPOSITION OF THE MARGARINES AND SPREADS

MAKSAT SERIKOV¹; MERUYET NURGALIYEVA^2*; ASSYA SERIKBAYEVA¹; ZHULDUZ SULEIMENOVA¹ and KARIMA MYRZABEK¹
DOI: https://doi.org/10.21894/jopr.2024.0029  |   Published Online: 26 April 2024
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REVIEW ARTICLE
Vol. 37 (2) June 2025, p. 209-223

SPENT BLEACHING EARTH AS VALUE-ADDED MATERIAL TO MATERIAL CONSTRUCTION APPLICATIONS: A REVIEW

FARDIN HASIBUAN^1*; MOHD KAMEL WAN IBRAHIM¹ and NUGROHO PRATOMO ARIYANTO²
DOI: https://doi.org/10.21894/jopr.2024.0028  |   Published Online: 26 April 2024
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RESEARCH ARTICLE
Vol. 37 (2) June 2025, p. 263-273

ASSESSMENT OF PARASITIC NEMATODES Elaeolenchus parthenonema POINAR, ON POLLINATING WEEVIL, Elaeidobius kamerunicus AT SELECTED OIL PALM PLANTATIONS IN PAHANG, MALAYSIA

NUR FARAH EZZATY^1,2; SITI NURULHIDAYAH AHMAD³; IZFA RIZA HAZMI²; MOHAMED MAZMIRA MOHD MASRI³ and JOHARI JALINAS^1,2*
DOI: https://doi.org/10.21894/jopr.2024.0027  |   Published Online: 4 April 2024
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RESEARCH ARTICLE
Vol. 37 (3) September 2025, p. 430-440

STUDY ON THE EFFECT OF VARIOUS TYPES OF FERTILISER ON THE PRODUCTION OF OIL PALM ROOT CUTTING

CECEP IJANG WAHYUDIN¹; HARIYADI¹*; SUDRAJAT¹; SUDIRMAN YAHYA¹ and SYAIFUL ANWAR²
DOI: https://doi.org/10.21894/jopr.2024.0026  |   Published Online: 4 April 2024
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RESEARCH ARTICLE
Vol. 37 (2) June 2025, p. 288-299

OBJECT-BASED IMAGE ANALYSIS (OBIA) ON HYPERSPECTRAL IMAGERY FROM DRONE FOR Ganoderma BASAL STEM ROT DISEASE DETECTION IN OIL PALM

MOHAMAD ANUAR IZZUDDIN¹; AROF HAMZAH²*; MOHD NOOR NISFARIZA³ and ABU SEMAN IDRIS¹
DOI: https://doi.org/10.21894/jopr.2024.0025  |   Published Online: 1 April 2024
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RESEARCH ARTICLE
Vol. 37 (2) June 2025, p. 274-287

ASSESSING THE PRODUCTIVITY, ECONOMIC AND SUSTAINABILITY IMPACTS OF SHELL DNA TESTING IN INDONESIAN OIL PALM SMALLHOLDINGS IN MUSI BANYUASIN AND PELALAWAN REGENCIES

ISMAIL MASKROMO¹; JEANETTE KUMAUNANG¹; KRISTIANTO NUGROHO¹; A MUIS HASIBUAN²; RERENSTRADIKA TIZAR TERRYANA³; SYAFARUDDIN⁴; ENGELBERT MANAROINSONG⁴; MUHAMMAD A BUDIMAN⁵; ABDUL R PURBA⁵; NATHAN D LAKEY⁶; JARED M ORDWAY⁶ and PUJI LESTARI^1*
DOI: https://doi.org/10.21894/jopr.2024.0024  |   Published Online: 22 March 2024
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REVIEW ARTICLE
Vol. 36 (4) December 2024, p. p. 560-585

DIETS AND HEALTH BENEFITS OF GUT MICROBIOTA-FERMENTED SHORT-CHAIN FATTY ACIDS: A PERSPECTIVE OF THE MALAYSIAN DIET CONTAINING PALM OIL

SIA-YEN, YAP¹*; PHOOI-TEE, VOON¹ and SELVADURAY, KANGA RANI¹
DOI: https://doi.org/10.21894/jopr.2024.0023  |   Published Online: 18 March 2024
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RESEARCH ARTICLE
Vol. 37 (2) June 2025, p. 338-346

GROWTH CHARACTERISTICS AND SUSTAINABILITY INDEX AT DIFFERENT DEVELOPMENT STAGES OF IMMATURE OIL PALM UNDER MONO- AND INTERCROPPING SYSTEMS

CUCU SUHERMAN¹*; YUDITHIA MAXISELLY¹; ANNE NURAINI¹; MOCHAMAD ARIEF SOLEH¹ and HARIS MAULANA^1,2
DOI: https://doi.org/10.21894/jopr.2024.0022  |   Published Online: 18 March 2024
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REVIEW ARTICLE
Vol. 37 (1) March 2025, p. 16-43

LIGNOCELLULOSIC BIOMASS-DERIVED BIOGAS: A REVIEW ON SUSTAINABLE ENERGY IN MALAYSIA

IZZAH FARHANA AB AZIZ¹; HASFALINA CHE MAN^1,2,3*; ALI DEMIRCI⁴; MUHAMMAD HAZWAN HAMZAH^1,2; ROZITA OMAR⁵; NUR SYAKINA JAMALI⁵; KAMIL KAYODE KATIBI^6,7 and ABDULSALAM MOHAMMED^3,8
DOI: https://doi.org/10.21894/jopr.2024.0021  |   Published Online: 18 March 2024
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RESEARCH ARTICLE
Vol. 37 (3) September 2025, p. 421-429

EFFECT OF OIL PALM FROND UTILISATION AS GREEN ROUGHAGE FEED ON KATJANG GOAT’S BODY WEIGHT

MD ZAINAL RASYIDI MAT RODI¹*; KAMIL AZMI TOHIRAN¹ and RAJA ZULKIFLI RAJA OMAR¹
DOI: https://doi.org/10.21894/jopr.2024.0020  |   Published Online: 13 March 2024
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RESEARCH ARTICLE
Vol. 37 (3) September 2025, p. 549-559

TRIBOLOGICAL AND THERMAL CHARACTERISATION OF PALM GREASE WITH ORGANIC THICKENER

MUHAMMAD FAKHRUR RAZZI ZULKIFLI¹; NURUL FARHANA MOHD YUSOF¹*; NADIAH AQILAHWATI ABDULLAH¹ and ZAIDI MOHD RIPIN¹
DOI: https://doi.org/10.21894/jopr.2024.0019  |   Published Online: 7 March 2024
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RESEARCH ARTICLE
Vol. 37 (3) September 2025, p. 377-396

DISCOVERING THE GLOBAL LANDSCAPE OF WOOD PRESERVATIVES

NUR AZREENA, I¹*; ZAWAWI, I¹ and NOORSHAMSIANA, A W¹
DOI: https://doi.org/10.21894/jopr.2024.0018  |   Published Online: 21 February 2024
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RESEARCH ARTICLE
Vol. 37 (2) June 2025, p. 249-262

BELOWGROUND FUNGAL COMMUNITY COMPOSITION AND DISTRIBUTION IN PEAT FORESTS AND A MANAGED PEAT ECOSYSTEM OF MALAYSIAN TROPICAL PEATLAND

NOR AZIZAH KUSAI¹; ZAHIDAH AYOB¹* and NIK SASHA KHATRINA KHAIRUDDIN¹
DOI: https://doi.org/10.21894/jopr.2024.0017  |   Published Online: 14 February 2024
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RESEARCH ARTICLE
Vol. 37 (3) September 2025, p. 492-505

DELIGNIFICATION METHODS FOR EMPTY FRUIT BUNCH CO-SUBSTRATE IN POME ANAEROBIC DIGESTION: AN EXPERIMENTAL COMPARATIVE ANALYSIS

MUHAMMAD ALPLEX FIRSTONDA KATON^2,4; FRENDY RIAN SAPUTRO¹; BAMBANG MUHARTO¹; ZULAICHA DWI HASTUTI¹; ADE SYAFRINALDY¹; ALDRIN SANOVA²; MUHAMMAD ILHAM AKBAR²; AGUS KISMANTO¹; RINALDI MEDALI RACHMAN²; NURUL AIYSHAH MAZLAN³; AHMAD MUHSIN ITHNIN³ and DHANI AVIANTO SUGENG¹*
DOI: https://doi.org/10.21894/jopr.2024.0016  |   Published Online: 14 February 2024
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REVIEW ARTICLE
Vol. 37 (1) March 2025, p. 1-15

A PICTURE OF RIPENESS: INVESTIGATING IMAGE-BASED TECHNIQUES FOR OIL PALM FRUIT GRADING

MUNIRAH ROSBI¹*; ZAID OMAR¹ and MARSYITA HANAFI²
DOI: https://doi.org/10.21894/jopr.2024.0015  |   Published Online: 14 February 2024
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RESEARCH ARTICLE
Vol. 37 (2) June 2025, p. 312-323

MECHANISATION STATUS OF OIL PALM NURSERY AND FIELD CULTIVATION IN WEST MALAYSIA

AZMI YAHYA¹*; HASLINA HASSAN¹; NOR MARIAH ADAM²; DARIUS EL PEBRIAN³* and AHMAD SUHAIZI MAT SU⁴
DOI: https://doi.org/10.21894/jopr.2024.0014  |   Published Online: 9 February 2024
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RESEARCH ARTICLE
Vol. 37 (2) June 2025, p. 324-337

AN INVESTIGATION OF 30% PALM BIODIESEL BLEND FUEL (B30) UNDER INDONESIAN OPERATING CONDITIONS

IHWAN HARYONO¹; R C NUGROHO¹; M T SURYANTORO¹; HARI SUMARTONO²; SITI YUBAIDAH¹; NACEP SURYANA¹; BUDI ROCHMANTO¹; DEDY INDRIATMONO¹; R T SOEWONO¹; MUHAMMAD MA’RUF¹; K F ADHI SUKRA²; HENRY NOLANDY¹; MOKHTAR³; HERU PRIYANTO²; AGUS WAHIDIN¹; ADE KURNIAWAN¹; VEBRIYANTI HAYOTO²; SUHERMAN MUKTI¹; LUKMAN SALAHUDDIN²; P DIAH RIZKY LESTARI⁴; HARI SETIAPRAJA¹* and IMAN K REKSOWARDOJO^5,6
DOI: https://doi.org/10.21894/jopr.2024.0013  |   Published Online: 8 February 2024
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RESEARCH ARTICLE
Vol. 37 (2) June 2025, p. 224-234

APPLICATIONS OF ORGANIC FUNGICIDES, ENDOPHYTIC BACTERIA, BIOFUNGICIDES, AND BIOSTIMULANTS IN CURATIVE CONTROL OF Ganoderma

DEDEN DEWANTARA ERIS¹; AGUSTIN SRI MULYATNI¹; IRMA KRESNAWATY¹; TRI PANJI¹; PRIYONO¹; LARASATI MARDHIKA¹; KUWAT TRIYANA² and HAPPY WIDIASTUTI¹*
DOI: https://doi.org/10.21894/jopr.2024.0012  |   Published Online: 2 February 2024
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REVIEW ARTICLE
Vol. 36 (4) December 2024, p. p. 547-559

PATENT LANDSCAPE REVIEW ON MODERN OIL PALM CLIMATIC ADAPTATION STRATEGIES: GAPS AND OPPORTUNITIES

YEONG SHENG TEY^{1 *} and MARK BRINDAL²
DOI: https://doi.org/10.21894/jopr.2024.0011  |   Published Online: 31 January 2024
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RESEARCH ARTICLE
Vol. 36 (2) June 2024, p. 246-253

EXAMINING THE USE OF SUBSOIL AS MEDIA FOR OIL PALM SEEDLINGS IN THE MAIN NURSERY

T. SABRINA^{1 *}; MENTARI ONIVA MULYA¹ and MUKHLIS¹
DOI: https://doi.org/10.21894/jopr.2024.0010  |   Published Online: 30 January 2024
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RESEARCH ARTICLE
Vol. 37 (1) March 2025, p. 172-180

INVERSE VULCANISED POLYSULPHIDE ADSORBENT FROM WASTE COOKING PALM OIL FOR Cu²⁺ REMOVAL

MOHD FAIZAL ALI¹; NANCY NUBUR LIBAT¹; HANNAH NISA ADAWIYAH¹; ABDULLAH NAYEEM^1,2 and JUN HASLINDA SHARIFFUDDIN ^1,3*
DOI: https://doi.org/10.21894/jopr.2024.0009  |   Published Online: 29 January 2024
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REVIEW ARTICLE
Vol. 36 (3) September 2024, p. 349-366

AUTONOMOUS HARVESTING ROBOT FOR OIL PALM PLANTATION: A REVIEW

TEOH KEAN HAO¹* and LAI NAI SHYAN¹
DOI: https://doi.org/10.21894/jopr.2024.0008  |   Published Online: 23 January 2024
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RESEARCH ARTICLE
Vol. 37 (2) June 2025, p. 300-311

BATCH SYSTEM CLARIFICATION OF TWO VARIETIES OF PALM OIL: KINETICS AND THERMODYNAMICS

EDNA TAH¹; GODLOVE NFOR NJESHU²; DIVINE NDE BUP¹*; CERILE WOUMBO³; ALIX NTONGME MBOUKAP³ and HILAIRE WOMENI³
DOI: https://doi.org/10.21894/jopr.2024.0007  |   Published Online: 23 January 2024
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RESEARCH ARTICLE
Vol. 37 (1) March 2025, p. 160-171

PHYSICOCHEMICAL AND RHEOLOGICAL PROPERTIES OF RED PALM OLEIN OLEOGELS MADE WITH BEESWAX AS THE OLEOGELATOR

ANNISA NOOR RACHMAWATI¹; NUR WULANDARI^1,2* and EKO HARI PURNOMO^1,2
DOI: https://doi.org/10.21894/jopr.2024.0006  |   Published Online: 23 January 2024
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RESEARCH ARTICLE
Vol. 37 (1) March 2025, p. 96-109

INSECT COMMUNITY ASSOCIATED WITH Ganoderma BASIDIOCARPS IN OIL PALM PLANTATIONS OF SABAH

MUHAMMAD NURUL YAQIN SYARIF¹; SHAMALA SUNDRAM¹*; SITI NURULHIDAYAH AHMAD¹; MOHAMED MAZMIRA MOHD MASRI¹ and IDRIS ABU SEMAN¹
DOI: https://doi.org/10.21894/jopr.2024.0005  |   Published Online: 10 January 2024
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RESEARCH ARTICLE
Vol. 36 (4) December 2024, p. p. 687-707

COMPOSITE OF ZnO/SBE AS CATALYST MATERIALS FOR PHOTODEGRADATION OF RHODAMINE-B

DIAH SUSANTI¹*; SHAFIRA MARELLIA¹; AZZAH DYAH PRAMATA¹; I D A A WARMADEWANTHI²; ERVIN NURHAYATI²; HANIFFUDIN NURDIANSAH¹ and JHY-CHERN LIU³
DOI: https://doi.org/10.21894/jopr.2024.0004  |   Published Online: 9 January 2024
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RESEARCH ARTICLE
Vol. 37 (2) June 2025, p. 235-248

MATERIAL CIRCULARITY INDICATOR FOR THAI OIL PALM INDUSTRY

NONGNUCH POOLSAWAD¹; MUTHITA KACHAPOCH²; JANTIMA SAMNEANGNGAM¹ and THANWADEE CHINDA²*
DOI: https://doi.org/10.21894/jopr.2024.0003  |   Published Online: 9 January 2024
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RESEARCH ARTICLE
Vol. 37 (1) March 2025, p. 131-147

EXPERIMENTAL INVESTIGATIONS ON TRIBOLOGICAL ASSESSMENT AND NOx EMISSIONS OF PALM BIODIESEL BLENDED WITH OLEIC ACID AND ETHANOL

KARTHIC RAJA M¹; KAMALESH A SORATE¹* and PURNANAND V BHALE¹
DOI: https://doi.org/10.21894/jopr.2024.0002  |   Published Online: 9 January 2024
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RESEARCH ARTICLE
Vol. 37 (1) March 2025, p. 148-159

SEDIMENT FORMATION IN A PALM OIL BIODIESEL BLEND IN A SHIP FUEL TANK

JAJANG AMIR HIDAYAT¹; BAMBANG SUGIARTO¹*; YULIANTO SULISTYO NUGROHO¹; AHMAD SYIHAN AUZANI¹; HARI SETIAPRAJA² and SITI YUBAIDAH²
DOI: https://doi.org/10.21894/jopr.2024.0001  |   Published Online: 2 January 2024
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RESEARCH ARTICLE
Vol. 37 (1) March 2025, p. 53-63

APPLICATION OF SEAWEED EXTRACTS IN OIL PALM (Elaeis guineensis) SEEDLINGS SUBJECTED TO WATER DEFICIT: PHYSIOLOGICAL, BIOCHEMICAL AND ENZYMATIC RESPONSES

MUHAMMAD DANIAL MOKHTARUDDIN¹; NUR AIFAA ABD RAZAK¹; AISAMUDDIN ARDI ZAINAL ABIDIN¹; NOR IZZATI HUSNA NOORHISHAM²; NUR ASNA FAIQAH JOHARI¹ and ZETTY NORHANA BALIA YUSOF^1,2,3*
DOI: https://doi.org/10.21894/jopr.2023.0066  |   Published Online: 27 December 2023
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RESEARCH ARTICLE
Vol. 37 (1) March 2025, p. 85-95

ANTIFUNGAL VOLATILE ORGANIC COMPOUNDS (VOC) FROM A STRAIN OF Fusarium foetens AGAINST Ganoderma boninense

ANISA LUTFIA¹* and BEDAH RUPAEDAH¹
DOI: https://doi.org/10.21894/jopr.2023.0065  |   Published Online: 27 December 2023
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RESEARCH ARTICLE
Vol. 37 (1) March 2025, p. 64-71

In Vitro CULTURAL STUDIES FOR CALLOGENESIS AND EMBRYOGENESIS OF OIL PALM (Elaeis guineensis Jacq.) USING SEEDLING AND SPEAR LEAF EXPLANTS

B KALYANA BABU^1*; R K MATHUR¹ ; K SURESH¹ ; G RAVICHANDRAN¹ ; B SUSANTHI¹ and S TIWARI¹
DOI: https://doi.org/10.21894/jopr.2023.0064  |   Published Online: 26 December 2023
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RESEARCH ARTICLE
Vol. 37 (1) March 2025, p. 110-121

ANALYSIS OF THE ENERGY CONSUMPTION OF MOTORISED CIRCULAR SAW WHEN CUTTING OIL PALM FROND

SUN QUN¹* and ZAIDI MOHD RIPIN¹
DOI: https://doi.org/10.21894/jopr.2023.0063  |   Published Online: 5 December 2023
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RESEARCH ARTICLE
Vol. 37 (1) March 2025, p. 72-84

ANALYSIS OF PUTATIVE EgBBM PROMOTER BINDING PROTEINS DURING OIL PALM SOMATIC EMBRYOGENESIS

KAMOLWAN KHIANCHAIKHAN¹; SUVICHARK AROONLUK²; SUPACHAI VUTTIPONGCHAIKIJ^1,3 and CHATCHAWAN JANTASURIYARAT^1,3*
DOI: https://doi.org/10.21894/jopr.2023.0062  |   Published Online: 29 November 2023
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RESEARCH ARTICLE
Vol. 37 (1) March 2025, p. 44-52

SPECIES COMPOSITION OF BIRDS IN OIL PALM AREAS, NORTHERN SARAWAK, BORNEO, MALAYSIA

BETTYCOPA AMIT¹*; ANGIE SAPIS¹ and NIK SASHA KHATRINA KHAIRUDDIN¹
DOI: https://doi.org/10.21894/jopr.2023.0061  |   Published Online: 29 November 2023
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RESEARCH ARTICLE
Vol. 37 (1) March 2025, p. 122-130

CORROSION SIMULATION OF AUTOMOTIVE MATERIALS UNDER EXPOSURE IN BIODIESEL

S Y CETIN^1,2*; M A MALEQUE³; H H MASJUKI²; A HAMDANI² and M M RAHMAN⁴
DOI: https://doi.org/10.21894/jopr.2023.0060  |   Published Online: 29 November 2023
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RESEARCH ARTICLE
Vol. 36 (4) December 2024, p. p. 618-629

OIL PALM LEVEL OF RIPENESS CLASSIFICATION USING EFFICIENTDET-LITE CNN ARCHITECTURE

YOSUA ALVIN ADI SOETRISNO¹*; EKO HANDOYO¹; SUMARDI¹ and ENDA WISTA SINURAYA¹
DOI: https://doi.org/10.21894/jopr.2023.0059  |   Published Online: 3 November 2023
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RESEARCH ARTICLE
Vol. 36 (4) December 2024, p. p. 640-649

EVALUATION OF DIFFERENT RATES AND TYPES OF MOROCCAN PHOSPHATE ROCKS ON OIL PALM SEEDLINGS

NORAKMAL KHAIRUANUAR¹, TAN NGAI PAING¹*, MOHAMED HANAFI MUSA¹ and ADIBAH MOHD AMIN¹
DOI: https://doi.org/10.21894/jopr.2023.0058  |   Published Online: 3 November 2023
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RESEARCH ARTICLE
Vol. 36 (4) December 2024, p. p. 728-738

DEVELOPMENT OF SOLID FAT CONTENTBASED PREDICTIVE MODEL FOR MARGARINE FORMULA DESIGN

JIAJIA GONG¹; NANXI SHU¹; XIAN SUN¹; XINYU CAO¹; YUANFA LIU¹ and YONG-JIANG XU¹*
DOI: https://doi.org/10.21894/jopr.2023.0057  |   Published Online: 26 October 2023
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SHORT COMMUNICATION
Vol. 36 (3) September 2024, p. 534-546

PALM OIL MILL EFFLUENT (POME) AS A SOURCE OF BIOFUELS AND VALUE-ADDED PRODUCTS VIA OIL RECOVERY: A REVIEW

YEE MUN TANG¹; KOK TAT TAN² and LAI PENG WONG¹*
DOI: https://doi.org/10.21894/jopr.2023.0056  |   Published Online: 26 October 2023
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RESEARCH ARTICLE
Vol. 36 (4) December 2024, p. p. 664-673

BACTERIAL CELLULOSE PRODUCTION FROM OIL PALM FROND JUICE AND ITS IMPREGNATION WITH SILVER NANOPARTICLES FOR ANTIBACTERIAL WOUND DRESSING

TAN SOU MIN¹; NOR SYAHIRAH ABD KARIM¹; SHAHRIL MOHAMAD¹; JUNAIDI ZAKARIA¹; MOHD HAFIZ ARZMI²; HASSAN FAHMI ISMAIL³ and ROHANA ABU¹*
DOI: https://doi.org/10.21894/jopr.2023.0055  |   Published Online: 26 October 2023
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