• Journal of ILASS-Korea
• /
• v.14 no.3
• /
• pp.122-130
• /
• 2009

Vegetable oil and its derivatives as an alternative diesel fuel have become more attractive recently because of its environmental benefits and the fact that they are made from renewable resources. Viscosity is the most significant property to affect the utilization of vegetable oil and its derivatives in the compression ignition engines. This paper presents the existing correlations for predicting the viscosity of vegetable oil and its derivatives for compression ignition engines. According to the parameter considered in the correlations, the empirical correlations can be divided into six groups: correlations as a function of temperature, of proportion, of composition, of temperature and composition, of temperature and proportion, and of fuel properties. Out of physical properties of fuel, there exist in the literature several parameters for giving the influence on kinematic viscosity such as density, specific gravity, the ratio of iodine value over the saponification value, higher heating value, flash point and pressure. The study for the verification of applicability of existing correlations to non-edible vegetable oil and its derivatives is required.

• Proceedings of the Korean Institute of Building Construction Conference
• /
• 2016.05a
• /
• pp.147-148
• /
• 2016

Generally, the vegetable oil contains glycerin esther and free fatty acid. When the vegetable oil reacts with concrete, the glycerin esther from oil induces saponification by reacting with and hydrolyzing calcium hydroxide from cement hydration. As a result of this saponification, it has been reported the expansion of concrete. although the free fatty acid from vegetable oil, as an acid, can decompose the concrete by producing soluble salt from calcium hydroxide or CSH, the hydration products of cement, there was no report on the harmful oil type for concrete. therefore, in this research, the property change of cement mortar incorporating fly ash was analyzed experimentally by immerging various types of vegetable oils.

• The Transactions of The Korean Institute of Electrical Engineers
• /
• v.60 no.2
• /
• pp.338-343
• /
• 2011

In this paper, the FT-IR, conductivity and flow electrification phenomena of Vegetable oils were discussed. Vegetable oil has high flash point and eco-friendly properties compared to conventional mineral oil. Accelerated aging transformer oil samples produced in the oven at 140[$^{\circ}C$] for 500 hours, 1000 hours, 1500 hours, 2000 hours. Serial device to measure the flow electrification phenomena was designed and fabricated. Pico ammeter and the Labview data measurements were utilized. The effects of Temperature and antistatic agent on fluid flow electrification were investigated. Both Mineral and vegetable oil showed similar trends for temperature change. The polarity reversal occurred in mineral oil with antistatic agent above 10 ~ 30[ppm] and in vegetable oil with antistatic agent above 5[ppm].

• Analytical Science and Technology
• /
• v.18 no.5
• /
• pp.444-451
• /
• 2005

The accurate and simple extraction method for sterols and fatty acids in sesame oil was developed. The new method improved the extraction efficiency of sesamin in sesame oil and the ratio of sesamin over campesterol. It will be applied to judgement of adulteration of plant edible oils. The minor components of sterols were also confirmed. The simultaneous determination of sterols and fatty acids with derivatization were processed, but it was not enough to confirm adulteration, thus need more experiments.

• Journal of Plant Biotechnology
• /
• v.36 no.2
• /
• pp.97-105
• /
• 2009

Seed storage lipids of plants, essential for seed germination as energy supplier, have been used for humankind and animal as nutrition sources. Fatty acids of vegetable oils have the characters appropriate for industry based on their chain length, the position and the number of double bonds. So they are used as raw materials for lubricants, cosmetics, soaps, paints and plastics or as energy source such as bio-diesel. However, there is a limit that applies vegetable oils from typical oil crops for industrial uses, mainly because of the mixture of five common fatty acids. Therefore, identification of unusual fatty acids for industrial uses from diverse plant resources and metabolic engineering to produce unusual fatty acids have been carried out in Arabidopsis as a model for the study of oilseed biology. Here, we discuss the unusual fatty acids for industrial uses, the genes synthesizing them in lipid metabolism, and the current limits in production of transgenic plants accumulating unusual fatty acid in their seeds. In addition, we describe our work on metabolic engineering of Brassica napus for the production of the unusual fatty acid ricinoleic acid in the seed, because of its industrial uses.

• Korean Journal of Food Science and Technology
• /
• v.12 no.3
• /
• pp.216-218
• /
• 1980

The appearance of organochlorine insecticides in 43 samples of refined vegetable oils including rapeseed, rice bran, sesame, perilla and corn oils produced in Korea in 1976 was investigated. Residue levels varied depending on the pesticide, oil source and production area. Gas-liquid chromatographic techniques were used to detect and quantify the presence of heptachlor, its epoxide, BHC, aldrin, endrin and DDT residues.

• Microbiology and Biotechnology Letters
• /
• v.21 no.4
• /
• pp.306-309
• /
• 1993

Vegetable oils supplemented to the basal medicum stimulated mycelial growth of Flammulina velutipes. The mycelial yield was increased 3.5 folds by addition of 3% (v/v) ricebran oil. Maximum mycelial yield (18.2mg/ml) was obtained by addition of 3.0% ricebran oil with 1.0% $CaCl_2$ to the basal medium. There was no significant difference between the liquid and solid spawn in the yield of sporophores.

• Journal of the Korean Applied Science and Technology
• /
• v.23 no.1
• /
• pp.12-18
• /
• 2006

The transesterification of vegetable oils into Biodiesel at $60^{\circ}C$ was performed on the rotary viscometer. The overall yield(%) of fatty acid methyl ester from canola oil at optimum conditions was 95%. The viscosities of fatty acid methyl esters were predicted by Orrick and Erbarr's model. The overall yield increased as the viscosities of fatty acid methyl esters decreased. The limiting molar ratio of methanol to oil appeared to be 1:5. The content of sodium hydroxide as the optimum catalyst appeared to be 0.5wt%.

• Tribology and Lubricants
• /
• v.25 no.2
• /
• pp.125-131
• /
• 2009

Biodiesel produced from triglyceride which is main component of animal fats and vegetable oils by methanolysis was known for excellent lubricity. In this study, the lubricity of 12 kinds of biodiesel come from vegetable oils were analyzed using HFRR(High frequency reciprocating rig). The biodiesel synthesized from soybean oil has best lubricity by $153{\mu}m$ of wear scar in HFRR and used fried oil's biodiesel has slightly low lubricity by $299{\mu}m$. Also we have found that the lubricity of diesel was improved when mixing ratio of soybean biodiesel was increased in base diesel.

• Journal of the Korean Chemical Society
• /
• v.18 no.4
• /
• pp.297-303
• /
• 1974

An investigation has been performed to find an effective separation method of steriols and tocopherols from the deodorized condensates of vegetable oils. Simple heating of the starting mixture isolated the oil layer from water, and the former was collected. It was then methyl esterified followed by a distillation for the removal of fatty acid. The ensuing step was to saponify the residue. The unsaponifiable matter was extracted by both methanol and concentrated. The sterol was crystallized by cooling such concentrated solution. To obtain tocopherol, the mother liquor was first dissolved in methanol. Cooling this solution to $-20^{\circ}C$ trapped fatty acid which was filtered out. The filtrate was then treated with ion exchange resin.