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11.214  Articles
1 of 1.122 pages  |  10  records  |  more records»
Year by year, globally the production of petroleum decreases but its demand increases. The world will get the energy crisis including Indonesia if that condition happens continously. Because of that, Indonesia starts to develop IOR (improved oil recovery)... see more

The search for alternative sources for petroleum-based diesel fuels as led to search  on a new perspective  which utilizes vegetable oils and animal fats to produce biodiesel fuels as substitution to the current petroleum-based fuel.This researc... see more

The catalytic activity of H5NZA, Ni/H5NZA and Co/H5NZA converting methyl ester jatropha have been studied. The reaction was proceeded in flow fixed bed reactor that operated at the temperature of 450oC for 60 minutes using butanol as the catching-feed. Th... see more

Fatty acid methyl esters (FAME) are produced by transesterification. The problem in the product of transesterification is the presence of impurities such as mono-, di-, triglycerides, and free fatty acids. So that, the purification using solvent fractiona... see more

Recently, the fatty acid ethyl ester has been synthesized in place of fatty acid methyl ester since ethanol has been more renewable. In this research, oleic acid ethyl ester (OAEE) was synthesized using germinated jatropha seeds (Jatropha curcas.L) and ri... see more

Nitration of methyl ester from mahogany oil (Swietenia mahagoniLinn) can be produced by Methyl Ester Nitrate (MEN), an additive that is useful for increasing Cetane Numbers in diesel fuel. This study aims to determine the yield of MEN that can be produced... see more

Biodiesel is synthesized from the trans-esterification reaction of vegetable oil and alcohol using a catalyst such as acids, bases or enzymes. The acid catalyst that is often used is sulfuric acid; H2SO4, and HCl while most of base catalysts are NaOH and ... see more

Analysis of scientific and patent literature shows the promising results of searching biologically active compounds among derivatives of aromatic aminoacids. For many years at the Medical Chemistry department of the National University of Pharmacy the res... see more

Germination brings out the synthesis or activation of enzymes responsible for the degradation of seeds reserves. Among these enzymes, esterases are involved in the metabolic processes of germination and maturation of plants. They are constitutively expres... see more

1 of 1.122 pages  |  10  records  |  more records»