International Journal of Oil Palm
International Journal of Oil Palm (IJOP) is an online and print mode, a peer-reviewed research journal published by Indonesian Oil Palm Society (Masyarakat PerkelapaSawitan Indonesia, MAKSI), it provides a global publication platform for researcher, scholars, academicians, professionals and students engaged in research in oil palm industries. The main aim of IJOP is to become the world’s leading journal in oil palm that is preferred and trusted by the community through publishing authentic, peer-reviewed and scientifically developed research articles of international caliber. The journal is published three times in a year, 6-10 papers per publication, and the language of the journal is English. JOURNAL SCOPE IJOP publishes research papers in the felds of soil and crop fertilizer application, seedling preparation, cover crop management, leaf pruning, weed control, control of pest and diseases, insect pollinators management, water management, intercropping, cattle oil palm integration, environmental studies, harvesting technology, IT remote sensing GPS application, mechanization, sustainability standards, policy studies, social and economic studies, smallholders empowerment, palm oil mill improvement, biomass utilization, carbon footprint, water footprint, market studies, refinery, food and nutrition technology (oleofood, food safety, pharmaceutical, and nutraceutical) and also management of soil preparation, inorganic and organic safety, oleochemicals, downstream industry development, supply chain, and market studies. The published articles can be in the form of research articles, review paper or short communications which have not been published previously in other journals (except in the form of an abstract or academic thesis/dissertation or presented in seminar/conference).
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<![CDATA[Synthesis of Nanocomposite Materials for Biodegradable Food Packaging ]]>
<![CDATA[Johnner Parningotan Sitompul]]>;
<![CDATA[Daru Setyawan]]>;
<![CDATA[Aldhita Graffi Nabila]]>;
<![CDATA[Vita Wonoputri]]>;
<![CDATA[Hyung Woo Lee]]>
<![CDATA[ International Journal of Oil Palm Vol. 2 No. 1 (2019): January 2019 ]]>
Publisher : <![CDATA[Indonesian Oil Palm Society /IOPS (Masyarakat Perkelapa-sawitan Indonesia /MAKSI) ]]>
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DOI: 10.35876/ijop.v2i1.22
<![CDATA[This paper concerns on synthesis of nancomposite materials, based on poly(D,Llactic acid)/poly(L-lactic acid). The Poly(L,D-lactic acid) (PDLLA) was produced from L,Dlactic acid through direct polycondensation method and poly(L-lactic acid) (PLLA) derived from L-lactide through ring-opening polymerization method. The PDLLA/PLLA films were produced through solvent casting method. The ratio of PDLLA in the PDLLA/PLLA matrix was determined by adjusting PDLLA fraction. The nanoclay used in this experiment were natural clay (Bentonite) and modified organoclay with quaternary ammonium salt (Cloisite 30B). The PLA blend nanocomposites was produced through solution intercalation with sonication. To determine the effect of amounts of nanoclay and sonication period, these two variable were varied. To analyze chemical structure of PLA, the PLA blend film were tested using Fourier Transform Infrared (FTIR). The dispersion of nanoclay on the PLA blend matrix was analyzed using X-Ray Diffraction (XRD) test. The properties of PLA blend nanocomposites film were then characterized using Universal Testing Machine (UTM), Water Vapor Permeability (WVP) test and the enzymatic biodegradability test. The fraction of PDLLA on the PLA blend was fixed 70 % wt. XRD test showed exfoliation of Cloisite 30B in the PLA matrix while the Bentonite was exfoliated as well as intercalated. The addition of nanoclay improved the tensile strength of PLA blend nanocomposites polymer to the number of 56.26 MPa and 37.65 MPa, respectively. Sonication period of PDLLA/PLLA nanocomposite affected the mechanical properties, barrier properties and polymer biodegradability. Moreover, from the WVP test, the barrier properties of the blend polymers was improved and increased twice compared to that of the pure PDLLA/PLLA.]]>
<![CDATA[Antioxidant Activity of Bioactive Constituents from Crude Palm Oil and Palm Methyl Ester ]]>
<![CDATA[Ahmad Gazali Sofwan Sinaga]]>;
<![CDATA[Donald Siahaan]]>
<![CDATA[ International Journal of Oil Palm Vol. 2 No. 1 (2019): January 2019 ]]>
Publisher : <![CDATA[Indonesian Oil Palm Society /IOPS (Masyarakat Perkelapa-sawitan Indonesia /MAKSI) ]]>
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DOI: 10.35876/ijop.v2i1.23
<![CDATA[Palm oil has many minor components that can act as natural antioxidant. It contains carotenoid and vitamin E. This research was conducted to determine antioxidant activity of non-polar extract from crude palm oil and fatty acid methyl ester. The oil extract obtained from crude palm oil by solvent extraction with hexane (CPO) and transesterification method followed by solvent extraction with hexane (PME). Carotene content from non-polar extracts were analyzed by using UV-visible spectrophotometer, while carotene composition (?- and ?-carotene) and vitamin E (tocopherol and tocotrienol) compositions were analyzed by using high performance liquid chromatography. Glycerides and esters content was analyzed by gas chromatography. Antioxidant activity of oil extract was determined by using 2,2’-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging assay method. Result revealed that PME has higher content carotenoid and vitamin E than CPO. As expected, the concentration of carotenoid and vitamin E in PME increased with transesterification process. Results also showed that all of non-polar extracts exhibited antioxidant activity significantly, as proven by inhibitory concentration 50% (IC50) of PME and CPO is 5.9 µg mL-1 and 15.6 µg mL-1. It is suggested that the presence of carotenoid and vitamin E may have a potential effect as natural antioxidant.]]>
<![CDATA[Rapid Inoculation Technique and Biological Control of Leaf Spot Disease in Oil Palm ]]>
<![CDATA[Delia Agustina]]>;
<![CDATA[Cahya Prihatna]]>;
<![CDATA[Antonius Suwanto]]>
<![CDATA[ International Journal of Oil Palm Vol. 2 No. 1 (2019): January 2019 ]]>
Publisher : <![CDATA[Indonesian Oil Palm Society /IOPS (Masyarakat Perkelapa-sawitan Indonesia /MAKSI) ]]>
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DOI: 10.35876/ijop.v2i1.24
<![CDATA[Oil palm (Elaeis guineensis) is one of the most efficient oil-producing crops in the world. However, fungal diseases such as basal stem rot (BSR) caused by Ganoderma sp. causes significant loss to the yield of adult palms. Apart from BSR, leaf spot disease caused by Curvularia sp. also causes significant loss during nursery stages. In this study, Curvularia sp. was isolated from a diseased palm seedling and a rapid and reproducible artificial inoculation method was developed. The technique has bioassay to determine the level of success of the control of leaf spot disease in a glasshouse setting. A natural, organic cyclic peptide fungicide and living cells of a bacterial strain Paraburkholderia sp. CP01 were tested for their efficacy to control leaf spot in oil palm seedlings. The severity of leaf spot disease in oil palm seedlings treated by organic cyclic peptide fungicide and CP01 was significantly lower than untreated control, indicating potential biological control agents. The results presented here provide technical reference and novel approach to controlling leaf spot disease of oil palm.]]>
<![CDATA[Prediction of Palm Based Biodiesel Properties Through the Preparation of Empirical Equation ]]>
<![CDATA[Joelianingsih Joelianingsih]]>;
<![CDATA[Marcelinus Christwardana]]>;
<![CDATA[Is Sulistyati Purwaningsih]]>
<![CDATA[ International Journal of Oil Palm Vol. 2 No. 1 (2019): January 2019 ]]>
Publisher : <![CDATA[Indonesian Oil Palm Society /IOPS (Masyarakat Perkelapa-sawitan Indonesia /MAKSI) ]]>
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DOI: 10.35876/ijop.v2i1.25
<![CDATA[Biodiesel is one of plant-based fuel that has been made mandatory by the Indonesian government for using in transportation, industries, and power plants. This obligation is gradually applied as stipulated in the regulation of the Ministry of Energy and Mineral Resources 12/2015 regarding to supply, use and plant-based fuel trade as alternative fuel. The percentage of biodiesel use was increasing from 20 % in 2016 to 30 % in 2030. The quality of biodiesel has to be continuously improved to support the regulation. Biodiesel with high performance has excellent flame characteristics, high oxidation stability and easy to flow at low temperature. These characteristics are highly determined by the composition of fatty acid methyl esters (FAME). Empirical equations were formulated based on primary data to predict the essential parameters of biodiesel, consisting of oxidation stability, cloud point, Iodine value, viscosity and density. The primary data were obtained by analyzing three biodiesel samples from domestic producers and two samples of biodiesel blend between palm stearin and soybean biodiesel. Identification results showed that all three samples have different FAME profiles which consist of palm oil biodiesel, palm stearin biodiesel and palm olein biodiesel. The empirical equations were formulated using statistical software and validated by comparing the calculated results with actual biodiesel parameters. This method reduced the testing time up to 13 working days and reduced testing cost up to 67% or IDR 1 190 000 per sample. The empirical equations formulated in this study were able to predict the essential parameters of biodiesel with the error was.]]>
<![CDATA[Valuation of Waste Oil Palm Biomass for Energy in Palm Oil Mill in Indonesia ]]>
<![CDATA[Armansyah Halomoan Tambunan]]>
<![CDATA[ International Journal of Oil Palm Vol. 2 No. 1 (2019): January 2019 ]]>
Publisher : <![CDATA[Indonesian Oil Palm Society /IOPS (Masyarakat Perkelapa-sawitan Indonesia /MAKSI) ]]>
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DOI: 10.35876/ijop.v2i1.26
<![CDATA[Valuation of biomass and its waste is indispensable for sustainable development of bioenergy in Indonesia. The objective of this research is to estimate the value of biomass, mainly from oil palm waste, for supporting bioenergy development in Indonesia. The research was applying thermodynamic theory to reinterpret the economic valuation by exergonomic analysis on biomass conversion to electricity. The results revealed that exergonomic value of electricity generated from oil palm fiber was 5 cents USD kWh-1, while the steam was 0.46 cents US kWh-1, under the assumption of zero biomass value. When the value of electricity was at its production base cost, the biomass (i.e. oil palm fiber) could be valuated to Rp 296.57 per kWh of its exergy content, or Rp 1 764.73 kg-1 of the biomass. The real price of shell in the field was Rp 700 kg-1. The results show that either the oil palm fiber is undervalued or the production cost of electricity generated from the fiber could be lower.]]>
