• Journal of Nutrition and Health
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• v.12 no.1
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• pp.43-49
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• 1979

Triglyceride compositions of cottonseed, soybean, sesame, perilla corn and rapeseed oils have been determined by a high performance liquid chromatographic analysis. An optimum condition was obtained by using a ALC/GPC 244 type, from Waters Association, Japan with $\mu$ Bondapak $C_{18}(1/4^{'}\times1^{'})$ column. A similar distribution pattern of triglycerides was found in cottonseed, soybean, sesame, rapeseed and corn oils. It was noted that $C_{40}$, $C_{42}$ and $C_{44}$ were the major components in these seed oils, except perilla oil. The results showed that contents $O_{40}-C_{48}$ triglyceride types in cottonseed, sesame and corn oil were within $2.23{\sim}41.24%$ and $C_{38}-C_{48}$ triglyceride types in soybean oil were within $3.01{\sim}10.02%$ and $C_{34}-C_{46}$ triglyceride types in rapeseed oil were within $2.38{\sim}28.68%$.

• Journal of Sericultural and Entomological Science
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• v.35 no.1
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• pp.43-47
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• 1993

Using the new scouring soap made from rapeseed oil, various scouring test was done souring effects of new scouring soap were estimated. In the effects of scouring soap on the degumming ratio, OS (the soap made from oleic acid) was the most excellent and the next was RS (the soap made from rapeseed oil). Both OS and RS were more excellent than MS (the soap on the market). In a buffer power of soap solution, OS and RS were good, but MS was poor. The uneven dyeing was not observed in the silk fabric degummed by OS and RS, but observed in silk fabric degummed by MS. The value of tenacity and elongation in the silk degummed by OS and RS was higher that degummed by MS. In the crease recovery, softness and whiteness, the order of value was OS, RS, MS.

• Journal of the korean Society of Automotive Engineers
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• v.11 no.1
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• pp.31-43
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• 1989

The paper shows a solution by giving vegetable oil a chemical treatment, i.e., transesterification of the rapeseed oil without any modification of the diesel engine for reducing carbon deposits, and to evaluate rate of combustion with vegetable oils, their esterified fuel and their blend fuels using a double Wiebe's function approximation in a naturally aspired D.I. diesel engine. Since any oil will be as material for ester, if it is fatty acid, the sardine oil was considered. In the experiment, engine performance, exhaust gas emissions, and combustion characteristics were measured and calculated for a number of fuels: rapeseed oil, palm oil, ester of rapeseed oil, and these fuels blended with ethanol or diesel fuel.

• Korean Journal of Food Science and Technology
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• v.21 no.4
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• pp.468-479
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• 1989

The oxidative stability of the ramyon prepared with rapeseed oil fortified with antioxidants or blended with palm oil was studied to explore the possibility of substituting it for Imported frying fats and oils. Natural tocopherols, butylated hydroxyanisole(BHA), tertiarybutyl hydroquinone(TBHQ), and ascorbyl palmitate with citric acid were used at a level of 0.02 percent. Blended oils were prepared by adding a palm oil to the rapeseed oil at ratios of 7:3, 5:5, and 3:7(w/w), respectively. Ramyon samples were stored at $35.0{\pm}0.5^{\circ}C$. for 90 days. The values of parameters, such as peroxide value, unsaturation ratio, and dielectric constant, of the extracted oils were regularly determined. An organoleptic test for the flavor of the samples was also performed. The oxidative stability of the samples was estimated on the basis of the changes of the parameter values. The effectiveness of the antioxidants was in the order of TBHQ ${\gg}$ ascorbyl palmitate with citric acid>BHA>natural tocopherols. The oxidative stability of the ramyon prepared with the rapeseed oil containing 0.02 percent TBHQ was almost as good as that of the ramyon prepared with the palm oil. The stability of the ramyon prepared with the blended oil containing 70 percent palm oil was also as good as that of the ramyon prepared with the palm oil.

• Plant Resources
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• v.8 no.3
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• pp.281-285
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• 2005

In order to select suitable fertilizer level and sowing rate of Dangyo $^{#8}$(hybrid) rapeseed at the southern area of Korea, two varieties of Naehanyuchae (Normal) and Dangyo $^{#8}$(hybrid) rapeseed currently grown for oil production by two fertilizer level with 10-8-8 kg/10a and 15-8-8 kg/10a and three sowing rate with 500 g/10a, 1,000g/10a and 1,500g/10a with relatively high yield was grown at the same condition yield and yield components were observed. Dangyo $^{#8}$(hybrid) rapeseed was superior to oil-eed rapeseed for yield at the 15-8-8 kg/10a of fertilizer and 1,500 g/10a of sowing rate. Fertilizer level, $N-P_{2}O_5-K_{2}O$ = 15-8-8 kg/10a and sowing rate, 1,500 g/10a showed somewhat higher value in two varieties of Naehanyuchae(Normal) and Dangyo $^{#8}$(hybrid).

• Korean Journal of Food Science and Technology
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• v.27 no.3
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• pp.298-302
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• 1995

This study was performed to know the availability of low erucic acid rapeseed oil (LEAR oil) for vegetable oil in commercial mayonnaise preparation. Mixed oils (blended soybean oil with LEAR oil) were prepared and mayonnaises were prepared with these oils and then compared the quality characteristics of these samples. The oxidative stability of vegetable oil with Rancimat test showed that LEAR oil was higher stability than soybean oil, and became higher with increase of LEAR oil ratio. Quality characteristics of mayonnaises with these oils showed that mayonnaise with mixed oils was preferred to that with LEAR oil itself. Furthermore, the quality characteristics of mayonnaises with mixed oils of soybean oil $(20{\sim}60%)$ plus LEAR oil $(80{\sim}40%)$ were better than those of mayonnaise with soybean oil solely.

• Food Science and Preservation
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• v.24 no.4
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• pp.529-535
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• 2017

Rapeseed cake was extracted with 80% ethanol and then fractionated with $H_2O$ (fraction I) as well as with 30% (II), 50% (III), 70% (IV), and 100% ethanol (V). Total phenolic content (TPC), 2,2-diphenyl-1-picrylhydrazyl (DPPH) radical scavenging activity, ferric-reducing antioxidant potential, and Trolox equivalent antioxidant capacity were in the order of fractions II > III > I > IV > V. The three fractions with high antioxidant activities and TPC (I, II, and III) were pooled and hydrolyzed by NaOH solution, resulting in 18.97 mg sinapic acid/g hydrolyzed extract and 21- and 2.2-fold increases in TPC and DPPH radical scavenging activity, respectively. Hydrolyzed rapeseed cake extracts (200, 500, and 1,000 ppm) and catechin (200 ppm) as a comparison were added to 10% fish oil-in-water emulsion, and their effects on oxidative stability were investigated by measuring hydroperoxide values (PV) during refrigerated storage. PVs were significantly lower in the emulsions with added hydrolyzed extract as compared to the control (p<0.05) and significantly decreased with increasing extract concentration (p<0.05) over a period of 29 days. The emulsion added with hydrolyzed extract showed higher PV than that added catechin at the same concentration (200 ppm) during 13-22 days (p<0.05), but after then, the PV was not significantly different (p>0.05). This study indicates that hydrolyzed rapeseed cake extract rich in sinapic acid may inhibit oxidation in a fish oil-in-water emulsion in a concentration-dependent manner.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.19
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• pp.78-82
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• 1975

The fatty acid composition of the oil in the rapeseed grown by spring and autumn planting were determined by gas liquid phase chromatography. Erucic acid content of the rapeseed oil grown by autumn planting was higher than that produced by spring planting, but the contents of oleic acid and linoleic acid were lower in autumn planting than those in spring planting. There was significant difference at 1% level between seasonal plantings. The reasons for the different fatty acid compositions were the low integrated temperature, the high amount of precipitation and the short hours of sunshine during the maturing period in autumn planting.

• Journal of the korean Society of Automotive Engineers
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• v.10 no.5
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• pp.61-68
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• 1988

This paper reports the basic performance of a naturally aspirated DI diesel engine which is used widely in industry and agriculture when vegetable oils are used as fuel substitutes. In this paper, the properties of vegetable oils as diesel fuel were investigated and the load-performance of diesel engine when vegetable oils were used, as tested compared against diesel fuel. The general objective of this investigation is to realize an efficient, clean, and low carbon deposit combustion of the vegetable oils in diesel engines, showing their feasibility as diesel fuel substitutes. The results of this experiment were as follows; (1) Compared with diesel fuel, the droplet size of vegetable oil is very large. (2) Compared with diesel fuel, rapeseed oil, palm oil, and their blend fuels offered lower smoke, lower NOx, ower engine noise, and high thermal efficiency in a D.I. diesel engine However, there were carbon deposit and piston ring sticking problems with long-term operation. (3) For ethanol-rapeseed oil blends, a 10-20% of ethanol content is recommended to enable lower BSHC and less smoke without a remarkable increase in engine noise compared with pure rapeseed oil. (4) A 10% oxygen content in the vegetable oils is contributed to reduced smoke emission.

• Journal of the Korean Applied Science and Technology
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• v.27 no.4
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• pp.421-426
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• 2010

The transesterification of rapeseed oil, soybean oil, and mixed fat were conducted at $65^{\circ}C$ with $Al_2O_3$-supported CaO, 0.8 wt% KOH, 1 wt% NaOH and mixed catalyst. The overall conversion(%) of rapeseed oil indicated to be 96% at the 12:1 molar ratio of methanol to oil, 8 wt% CaO and 2 wt% water. The pH ranges of biodiesel for mixed fat using four catalysts and for three fats using 8wt% CaO were 7.3-9.1, 7.3-7.5, respectively. The volumes of water needed to wash biodiesel from rapeseed oil using 0.8 wt% KOH and 8 wt% CaO were 15 mL and 3 mL.