Rubber Seed Research Articles

Pengaruh Variasi Kadar Air pada Produksi Lipase oleh Aspergillus aculeatus Ms. 11 dengan Fermentasi Substrat Padat Menggunakan Medium Press-Cake Biji Karet (Hevea brasiliensis Muell Arg.)

Lipase is an enzyme that has potential in industry. Lipases can be produced from microbes such as lipolytic molds. In several lipase production studies, solid state fermentation (SSF) was assessed to have better biomolecular characteristics at a lower cost than submerged fermentation (SmF) because it utilizes agro-industrial waste as a substrate. One of the underutilized agro-industrial wastes is rubber seed (Hevea brasiliensis Muell Arg.). Rubber seeds are considered to have high nutrient content (contains 29.12% protein, 24.68% carbohydrates), but their potential as a fermentation medium is not yet known. This study aims to utilize rubber seeds as a medium substrate to determine lipase productivity by Aspergillus aculeatus Ms. 11. The research method used was (SSF) with variations in water content as a parameter in lipase productivity. The results showed that the highest yield was obtained at 90% water content on day 4 with the amount of 314.735 U/g while the highest lipase productivity was obtained at 90% water content on second day with the amount of 131.567 U/g/day. These results indicate that high water content affects lipase productivity.

The Optimization of Tetrahydrofuran as a Co-Solvent on Biodiesel Production from Rubber Seed Using Response Surface Methodology

The Optimization of Tetrahydrofuran as a Co-Solvent on Biodiesel Production from Rubber Seed Using Response Surface Methodology

Characterization of Crude, Bleached Rubber Seed (Hevea Brasiliensis) Oil and Synthesis of its Methyl Ester Using Soy-Bean (Glycine Max) Lipase as Biocatalyst

Characterization of Crude, Bleached Rubber Seed (Hevea Brasiliensis) Oil and Synthesis of its Methyl Ester Using Soy-Bean (Glycine Max) Lipase as Biocatalyst

Waste rubber seeds as a renewable energy source: direct biodiesel production using a controlled crushing device.

A multistep and high-cost biodiesel production could be simplified using the direct transesterification (DT) method. A controllable device has been developed and applied to study the effects of the ratio of rubber seeds to methanol, catalyst concentration, reaction time and rotational speed on biodiesel conversion and fatty acid (FA) yield extraction. The controllable crushing device (CCD) assisted the DT of rubber seeds and operated at ambient temperature and pressure achieved a maximum biodiesel conversion of 97.5 ± 0.6% in a reaction time of 7 minutes. The biodiesel quality estimated based on the FA extraction profile is comparable with the biodiesel standard. In terms of energy efficiency and reaction time, the CCD saved 71–98% energy consumption and reduced the reaction time up to 99%.

Modeling and Optimization of Transesterification of Rubber Seed Oil Using Sulfonated Cao Derived from Giant African Land Snail (Achatina Fulica) Catalyst by Response Surface Methodology

Modeling and Optimization of Transesterification of Rubber Seed Oil Using Sulfonated Cao Derived from Giant African Land Snail (Achatina Fulica) Catalyst by Response Surface Methodology

PENYULUHAN PEMBUATAN PUPUK ORGANIK CAI R MENGGUNAKAN ALAT BIOREAKTOR DI DESA KARYA HARAPAN MUKTI KABUPATEN BUNGO

PENYULUHAN PEMBUATAN PUPUK ORGANIK CAI R MENGGUNAKAN ALAT BIOREAKTOR DI DESA KARYA HARAPAN MUKTI KABUPATEN BUNGO

Sistem Pendukung Keputusan Pemilihan Bibit Tanaman Karet Dengan Metode Profile Matching

PT. Asri Jaya had difficulty in selecting the best rubber plant seeds, both for direct planting in the plantations and recommending them to be marketed to rubber plantation companies, because the types of rubber plant seeds in the company had many varieties and varied as well as different ages of seeds. -different such as BPM seeds, IRR seeds, IRC, rubber frame seeds, GT (Gondang Tapen), PB seeds (Prang Besar), and so on. The alternatives used in this research are types of rubber plant seeds, namely BPM seeds (Balai/Pusat Perkebunan Medan, IRR (Indonesian Rubber Research) rubber seeds), IRC rubber seeds (Institute Research of Ceylon), frame rubber seeds, GT rubber seeds (Gondang Tapen) and PB (Prang Besar) rubber seedlings. The criteria used in this study were umbrella shape, petiole position, petiole shape, leaf color, leaf shape, leaf bone, leaf thickness, stem height, and seedling age. which is built using the programming language used in making the system is PHP with MySQL database. To calculate the total value, it must first determine the percentage of core factore and secondary factore. In this case the core factore is determined with a percentage value of 60% considering the main factor is an the most dominant aspect or criteria for assessing the selection of rubber plant seeds, the percentage value is greater than the pe value the percentage for the secondary factor is 40%.

Reduction of COD and Highly Coloured Mature Landfill Leachate by Tin Tetrachloride with Rubber Seed and Polyacrylamide

Tin tetrachloride (SnCl4) as a coagulant and rubber seed (Hevea brasiliensis) (RS), and polyacrylamide (PAM) as the coagulant aid were investigated in this work to treat matured and stabilised landfill leachate rich in COD and colour. A standard jar test was conducted at different pH values and dosages of coagulant/coagulant aid. When SnCl4 acted as the primary coagulant, the optimum conditions occurred at pH 8 and 10,000 mg/L dosages, with 97.3% and 81% reductions of colour and COD, respectively. Both RS and PAM were not effective when used alone. When RS was used as the coagulant aid, the dosage of SnCl4 was reduced to 8000 mg/L. The colour reduction was maintained at 97.6%, but the COD removal dropped to 43.1%. In comparison, when PAM was supplemented into 6000 mg/L SnCl4, the reduction in colour was maintained at 97.6%, and the COD removal was almost at par when SnCl4 was used alone. The addition of polymers as the coagulant aid helped in improving the sludge properties with a better settling rate (SSR) and larger flocs size. The decline of the SVI value indicates that less amount of sludge will be disposed of after the treatment. In addition, the rise of settling velocity (SSR) will reduce the size of the settling tank used in coagulation-flocculation treatment. Based on the results, it can be concluded that incorporation of coagulant aid into the treatment reduced the primary coagulant dosage without affecting the removal performances of pollutants.

Study on the Lubricating Properties of Castor (Ricinus communis) and Hydroxylated Rubber (Hevea brasiliensis) Seed Oil.

Rubber seed oil (RSO) (Hevea brasiliensis) was extracted from rubber seeds by chemical means. The effect of temperature on the oil yield was investigated. The experiment suggested that the maximum yield of the oil occurs at 60 °C. This is a result of the proximity to the boiling point of n-hexane, which is about 68 °C. Epoxidized and hydroxylated RSOs were further synthesized by performic acid generated in situ by the reaction of formic acid with 30% hydrogen peroxide. The physiochemical properties of the epoxidized rubber seed oil (ERSO) and hydroxylated rubber seed oil (HRSO) were determined. A separate study was also carried out on castor seed oil (CSO). The improved products were characterized with respect to their configuration and properties. Spectroscopic analysis was carried out on the oil base stocks (RSO, CSO, ERSO, and HRSO). All of the experimental findings were compared with one another. The lubricating properties of CSO and HRSO are further studied as a result of their common hydroxyl nature to ascertain their suitability as a lubricant base. Both oils can be categorized as a nondrying oil with saponification values of 179.52 and 255.25 mgKOH/g, respectively, and as such possess advantageous properties for industrial application. When compared to one another, HRSO appears to be a more effective choice as a lubricant base. This is because of its higher viscosity index of 380.65. The outcomes of this study indicate that hydroxylated and epoxidized RSO with high oxirane content can be synthesized concurrently by one-pot multistep reactions.

Peningkatan Ekonomi Masyarakat Pulau Kecil Melalui Pemanfaatan dan Pengolahan Biji Karet Dengan Teknologi Wafer Sebagai Pakan Ternak Kambing

Busuk Island is a small island located in Kuantan Singingi Regency, Riau Province. Potential resource on this island is rubber plantations. This service aims to utilize and process rubber seeds with wafer technology as goat fodder in an effort to improve community welfare. The service method is a Community Based Research (CBR) method is a method in which the community participates in this research and service process. The results show that community service activities produce 80 - 90% feedback from the community, although most people have a low level of education but it is still easy to understand the material, wafer nutrient content produced between treatments namely crude protein 10.02 - 11.40%, crude fiber 21.00 - 21.55% and crude fat 4.36 - 6.92 %. The conclusion of this service is that wafers with the addition of rubber seed waste to the level of 21% in the ration can be used as goat fodder with a community based research (CBR) service model which is an effective model to motivate farmers to increase the development and growth of goats to the maximum, so that the sale value goat livestock are also high and have implications for improving the welfare of the community

Biodiesel Production from a Mixture of Rubber Seed Oil and Waste Oil Through the Alcoholysis Process with Catalysts Based on Vegetable Waste

The increasing types of people needs along with the times have resulted in the need for energy increasing so that the supply of energy, especially energy that cannot be renewed (unrenewable energy) is decreasing. Currently, almost 80% of the world's energy needs are met by fossil fuels. In fact, the use of fossil fuels can cause global warming. To reduce dependence on fossil fuels as an energy source, it is necessary to search for energy sources that can be used as alternative fuels that are environmentally friendly. Indonesia is an agricultural country that is overgrown with plantation crops that produce various kinds of waste such as rubber seeds which contain oil. This plant produces a lot of wasted seeds that are not useful. Therefore, researchers want to research the oil from rubber seeds to be a biodiesel product and in order to get high quality results. This study regulates several independent variables, namely the alcoholysis temperatures: 650C, 700C and 750C and the alcohol volume: 200 ml, 250 ml and 300 ml. The process is carried out by extraction using the alkolysis method. The best yield yielded 60.5%, with the best yield of biodiesel from alcoholysis obtained at a volume of 250 ml of ethanol and a temperature of 75oC with a density of 09 kg/m3 and a viscosity of 3,285 mm2/s (cSt), fulfilling the requirements of SNI 7182:2015. Based on the results of GC analysis, the main fatty acid components in the sample were at peak 1, namely saturated fatty acids in the form of palmitic acid at 44,28% and peak 4, namely unsaturated fatty acids in the form of oleic acid at 31.99%.

Biomass Waste-Derived Rubber Seed Shell Functionalized Porous Carbon As an Inexpensive and Sustainable Energy Material for Supercapacitors

Biomass Waste-Derived Rubber Seed Shell Functionalized Porous Carbon As an Inexpensive and Sustainable Energy Material for Supercapacitors

UJI FORMULA BIOFUNGISIDA TABLET BERBAHAN AKTIF KONSORSIUM Trichoderma virens ENDOFIT DAN MIKORIZA INDIGENOUS TERHADAP PENYAKIT JAP PADA BIBIT KARET

The objective of this research is to determine the effect of biofungicide tablets with active ingredient of the consortium consisted Trichoderma virens endophyte and mycorrhiza indigenous and to get the best formula to control the JAP disease on rubber plant. The research was carried out experimentally by using a completely randomized design (RAL), consisting of 6 treatments and 4 replications in order to obtain 24 experimental units. Each experimental unit consisted of two seeds, so there were 48 rubber seeds. The treatments seed were: F1 (15 ml T. virens endophyte), F2 (15 gr inokulan mychorrhiza), F3 (15 ml T. virens endophyte + 15 gr inokulan mychorrhiza + 100 gr palm fronds powder + 25 gr zeolite + 25 gr tapioca powder), F4 (15 ml T. virens endophyte + 15 gr inokulan mychorrhiza + 100 gr sago powder + 25 gr sago dregs + 25 gr tapioca powder), F5 (15 gr inokulan mychorrhiza + 100 gr solid + 25 gr zeolite + 25 gr tapioca powder) and F6 (15 ml T. virens endophyte + 100 gr cocoa shells powder + 25 gr sago dregs + 25 gr tapioca powder). Parameter observerd were initial symptoms on seedlings, intensity of disease, addition of plant height, stem diameter, and weight of dry seedlings. The data obtained were analyzed for variance followed by further tests of honest real difference (BNJ) at the 5% level. The results indicated that F3 (15 ml T. virens endophyte + 15 gr inokulan mychorrhiza + 100 gr palm fronds powder + 25 gr zeolite + 25 gr tapioca powder) was the best formula in controlling JAP with initial symptoms of infection of 24,50 days with the seedling height was 69,46 cm, stem diameter and dry weight were 6,60 cm and 103,62 gr respectively.

Biodiesel Production from Rubber Seed Oil Using Natural Zeolite Supported Metal Oxide Catalysts

Biodiesel Production from Rubber Seed Oil Using Natural Zeolite Supported Metal Oxide Catalysts

Potential of Analog Meat from Rubber Seeds through Tissue Culture as a Solution for Unsaturated Fatty Acid Rich Meat: A Literature Review

Non-communicable diseases (NCD) in Indonesia is a chronic disease caused by many factors, such as genetical, physiological, environmental, behavioral and lifestile. According to Basic Health Research survey (RISKESDAS) in 2013 and 2018, the prevalence of NCD showed increasing number within the last 5 years. The cause of this phenomena was proofed due half of Indonesians people had been consuming high fat or cholesterol or fried food, 1 – 6 timer per week. This mini narrative review study aims to exploring and discovering the potency of meat analog (in-vitro meat) and tissue culture of rubber seed as a solution for high unsaturated fat meat diet. Literature study related to NCD was found in National Library of Medicine (PubMed). We found that rubber seed contains 9 out of 10 essential amino acid and some unsaturated fatty acids in which when combined with tempeh made by pillar nut (Vina unguiculata) will potentially become an analog meat (in vitro meat) by tissue culture. This idea should be implemented with experimental study hence clinical potency of aforementioned meat analog will be well known.

Non-Isocyanate Polyurethane (NIPU) based on Rubber Seed Oil Synthesized via Low-Pressured Carbonization Reaction

Epoxidised rubber seed oil (ERSO) was successfully synthesized into non-isocyanate polyurethane via carboxylation method whereas peroxoformic acid was formed by in-situ reaction for epoxidation. The effects of temperature and ratio of hydrogen peroxide and formic acid to rubber seed oil carboxylation were studied. The optimum temperature for the epoxidation reaction was found at 50 °C to avoid ring opening reaction of epoxy whilst the optimum ratio of hydrogen peroxide and formic acid is equal molar of double bond: formic acid at 1:2 and 1:1, respectively. At a lower concentration of hydrogen peroxide and formic acid, the oxirane ring was stable due to the lower hydrolysis (oxirane cleavage) of an epoxide. The effect of using low content of formic acid tends to minimize unwanted epoxide ring opening to occur and make the epoxidation rate increased with increasing of oxirane number. Fourier transform infrared (FTIR) spectral displayed the presence of an epoxy functional group at 822 cm-1 and the disappearance of double bond peak at 3011 cm-1 corresponding to epoxidised oil and carbonyl group confirmed the epoxidation reaction had taken place. 1H-NMR was used to confirm the formation of carboxylate functionality after the reaction of epoxy at δ 4.83 and 4.61 ppm. In conclusion, ERSO has great potential to be used as a precursor in producing environmentally friendly non-isocyanate polyurethane.

Performance Analysis of Rubber Seed Shell Activated Carbon Incorporated Polymeric Membrane for the Separation of Oil-in-Water Emulsion

Performance Analysis of Rubber Seed Shell Activated Carbon Incorporated Polymeric Membrane for the Separation of Oil-in-Water Emulsion

Wear Properties of Stainless Steel Lubricated by Cerbera and Rubber Seeds Methyl Esters under Boundary Lubrication Condition

The use of biodiesel fuel converted from vegetable-based oil are continuously increasing due sustainability and environment concerns. It is important to increase the portion of converted fuel from non-edible sources to reduce the use of food stock. In this study, the tribological properties of stainless-steel material was investigated when lubricated by two kinds of methyl esters converted from non-edible vegetable oils, i.e. Cerbera oil and Rubber seeds oil. The friction and wear were investigated by using a ball-on-disk tribometer at severe friction condition. The results show that the wear of material lubricated by both methyl esters was much smaller than that lubricated by petrol diesel fuel. At temperature of 27°C, the worn area on the ball specimens for the case of Cerbera and Rubber seeds methyl esters were 0.396 mm2 and 0.391 mm2 compared to 3.642 mm2 for the case of petroleum diesel fuel. At 80°C, they were 0.410 mm2 and 0.429 mm2 compared to 4.152 mm2 for the case of petroleum diesel fuel. This shows that both Cerbera and Rubber seeds methyl esters has a good tribological properties comparable to other methyl esters sources used for mineral diesel fuel substitute.

Development of Rubber Seed Shell–Activated Carbon Using Impregnated Pyridinium-Based Ionic Liquid for Enhanced CO2 Adsorption

In this study, rubber seed shell was used for the production of activated carbon by chemical activation using an ionic liquid, [C4Py][Tf2N] as an activating agent. Sample RSS-IL 800 shows the highest specific surface area of 393.99 m2/g, a total pore volume of 0.206 cm3/g, and a micropore volume of 0.172 cm3/g. The performance of AC samples as an adsorbent for CO2 was also studied using a static volumetric technique evaluated at a temperature of 25 °C and 1 bar pressure. The CO2 adsorption capacity for sample RSS-IL 800 was 2.436 mmol/g, comparable with reported data from the previous study. Results also show that the CO2 adsorption capacity decreased at a higher temperature between 50 and 100 °C and increased at elevated pressure due to its exothermic behavior. The Langmuir model fits the adsorption data well, and the isosteric heat of adsorption proved that the physisorption process and exothermic behavior occur.

Supercritical Carbon Dioxide Extraction of Hevea Brasiliensis Seeds: Influence of Particle Size on to Oil Seed Recovery and its Kinetic

The aim of this study is to investigate the effect of particle sizes on yield, diffusivity, mass transfer and morphological characterization on extraction rate of rubber seed oil recovery by supercritical carbon dioxide (ScCO2). Pressure 30 MPa, temperature 60 oC and average particle size 500 µm gives the maximum oil recovery (34.71%), diffusivity coefficient (5.13 E-12 m2/s) and extraction rate (0.6 mg/sec). The morphological characterization of extracted rubber seeds was done on the basis of scanning electron microscopy which was parallel with the results of the effect of particle size. The results obtained from gas chromatography-mass spectrometry showed that the rubber seeds oil contained significant essential fatty acids and certain chemical constituents which are very valuable.