• Title/Summary/Keyword: rapeseed oil

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Fundamental Study on Nutritional Evaluation for Rapeseed Meal (탈지유채종자의 영양평가에 관한 기초적 연구)

  • Tadahiro Tadokoro;Kazuhiro Kubo;Kazuhiro Yamada;Toru Ota;Akio Maekawa;Han, Yang-Il
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.23 no.3
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    • pp.409-413
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    • 1994
  • This fundamental study was undertaken to evaluate the nutritional value of Canola rapeseed meal which has been increasingly used as a by-product with the demand for the food oil resource. To compare the nutritive values among rapeseed meal and soybean meal, two experiments were carried out by using rats. One was a digestibility test of rapessed meal and the other was the growth rate of rats for 21 days. The chemical compositions , blucosinolate and amino acids of defatted repeseed meal and defatted soybean meal were analyzed. After one week feeding, nitrogen excretion in rats was measured to study FER, PER , TD , BW , and NPU of the meals. The amount of crude proteins in defatted rapeseed meal and defatted soybean meal were 45.5% and 37.9%. The glucosinolate content of defatted rapeseed meal was 0.04% . The body weight gain of defatted rapeseed meal was not signficantly different from that of defatted soybean meal (p>0.01). After one week feeding, there was no significant differencess in organ weight and serum components between two groups(p>0.01). It was presumed that the rapeseed meal has enough possibility for developing food to use as a protein source like a soybean meal protein. However, more careful experiments are needed to clarify the nutritional value of rapeseed meal of Canola since the lipids composition of blood tended to be different when the rapeseed meal and soybean meal were used.

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Performance of Pilot-Scale Biodiesel Production System (파일럿 규모의 바이오디젤 생산공정의 실증연구)

  • Jeong, Gwi-Taek;Park, Jae-Hee;Park, Seok-Hwan;Park, Don-Hee
    • KSBB Journal
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    • v.24 no.1
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    • pp.89-95
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    • 2009
  • Biodiesel (fatty acid alkyl esters), which is produced from sustainable resources such as vegetable oil, animal fat and waste oils, have used to as substitutes for petro-diesel. In this study, we investigate the performance of 30 L and 300 L pilot-scale biodiesel production system using alkali-catalyst transesterification from soybean oil and rapeseed oil produced at Jeju island in Korea. The 30 L-scale biodiesel production was performed to in the condition of reaction temperature $65^{\circ}C$, catalyst amount 1% (w/w) and oil to methanol molar ratio 1 : 8. At that reaction condition, the fatty acid methyl ester contents of product are above 98% within reaction time 30 min. Also, the conversion yield of over 98% was obtained in 300 L-scale biodiesel production system using rapeseed oil and soybean oil. The quality of biodiesel produced from reaction system was satisfied to recommended quality standard of Korea. Our results may provide useful information with regard to the scale-up of more economic and efficient biodiesel production process.

Effect of Planting Date and Plant Density on Yield and Quality of Industrial Rapeseed in Spring Sowing

  • Kwon, Byung-Sun;Jung, Dong-Soo
    • Plant Resources
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    • v.8 no.2
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    • pp.91-95
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    • 2005
  • In spring, to determine the optimal planting date and plant density of rapeseed in southern areas of Korea. $Taiwan^{\#1}$ variety for spring sowing, the highest yielding variety was grown under five different planting date and plant density. Yield components such as plant height, ear length, number of seedling stand per $m^2$, number of per ear and seed set percentage were highest at the plots with Mar. 5 of planting date and 50/20cm drilling of plant density. Yield of seed, oil, gas and 1,000 grains weight and erucic acid content were highest at the Mar. 5 of planting date and 50/20cm drilling of plant density. Judging from the results reported above, at optimum planting date and plant density of rapeseed seemed too be Mar. 5 of planting date and 50/20cm plant density in spring sowing.

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Effect of Sowing Time on Oil Content and Fatty Acid Composition Characteristics in Rapeseed Cultivars (파종시기에 따른 유채(Brassica napus L.) 기름함량 및 지방산 조성 특성)

  • Lee, Tae Sung;Lee, Yong Hwa;Kim, Kwang Soo;Lee, Hoo Kwan;Jang, Young Seok;Choi, In Hu;Kim, Kwan Su
    • Korean Journal of Plant Resources
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    • v.27 no.2
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    • pp.202-208
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    • 2014
  • This study was carried out to find the effect of sowing time on oil content and fatty acid composition of 6 domestic rapeseed cultivars, 'Sunmang', 'Tammiyuchae', 'Tamlayuchae', 'Naehanyuchae', 'Yongsanyuchae' and'Hallayuchae'. The delaying sowing date was negatively correlated with oil content ($-0.471^{**}$), indicating that oil content was higher with earlier sowing date. Fatty acid composition was similar in all cultivars. The delaying sowing date was positively correlated with the increment of stearic acid ($0.268^*$) and linoleic acid ($0.263^*$), while was inversely correlated with palmitic acid ($-0.278^*$) across all 6 cultivars.

Breeding for Improvement of Fatty Acid Composition in Rapeseed XXI. Oil Quality of Fatty Acid Improved Varieties in Cheju Area and Future Production Strategy (유채 지방산조성 개량육종에 관한 연구 제21보 지방산조성 개량품종 보급지역에서의 유질과 금후대책)

  • Lee, Jung-Il;Jung, Dong-Hee;Ryu, Su-Noh
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.39 no.2
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    • pp.165-170
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    • 1994
  • High quality rapeseed cultivars including Nojeokchae, Yeongsanyuchae Halla-yuchae and Tamrayuchae have been released and recommended as a zero erucic acid variety to Cheju farmers for 13 years, where is a major rapeseed production area in korea. However, rapeseeds produced in Cheju island in 1992 and 1993 contained 47.7% and 37.0% of erucic acid respectively resulting in poor quality oil being not adequate for edible oil. It was considered that the zero erucic acid varieties did not have an opportunity to be cultivated in Cheju island by farmers living in the Island. Thus, the new rapeseed varieties without erucic acid should be bred and recommended to the farmers of southern area of Korea as a multiple cropping crop just after rice harvest, and for large scale mechanized and labour-serving rapeseed culture. The change of rapeseed breeding goal would be desirable for fatty acid composition improvement of rapeseed to develop varieties adaptable to southern part of Korea, and to produce rapeseed oil directly used as an edible oil safely.

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A Study on the Changes of Frying Oil in Cooking (튀김 조리에 의한 식용유지의 변화에 관한 연구)

  • 신정균
    • Journal of the Korean Home Economics Association
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    • v.11 no.4
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    • pp.374-387
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    • 1973
  • This work was carried out to investigate the changes of chemical and physical properties of frying oil, when it was used many times continuously without adding new oil. Four kinds of frying oil (soybean oil, rapeseed oil, shortening and crude lard) and slices of potato and Aji (kind of fish) were used in the experiment under the condition of home cooking. Obtained results were as in the followings. 1. Acid values and peroxide values of each frying oil were under the safety level (A. V = 1.5, Po. V = 50) except crude lard, when frying works were continuously repeated five times for 50 days. 2. Changes of saponification values of each frying oil showed a decreasing tendency except the crude lard. But in cases, stickiness or clothing of oil were not seen in frying even at the five times frying. 3. Changes of optical density of each frying oil showed a decreasing tendency in all cases, according to the times of frying, especially at the first time frying. 4. Maximum heights of the shamp of each frying oil and their shampholding activites when heated, were slowly increased according to the times of frying. 5. Without concerning the cooking condition (kinds of oil, cooking material and repeating times of frying) decrement of oil in once frying was almost exactly 20g per 150g. 6. Decrements of cooking material in all cases of frying showed almost constant values, potato to be 40% and Aji 20%. 7. Differences of smoke point between new and old oil (frying repeated 5 times) showed also almost constant values. Liquid oil (soybean oil and rapeseed oil) showed number (6-$10^{\circ}C$), on the contrally solid oil (shortening and crude lard) a high number (10-$25^{\circ}C$). 8. Results of public tastic for the frying products were almost good even in that of a low five times frying, but the products, of third time frying with crude lard were expressed as disagreeable.

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Prevention of Oil Stain on Steel Induced by Fat and Oil Compounds (유지화합물에 의해 생성된 철판의 기름얼룩 방지)

  • Chung, Yeong-Jin;Nam, Chong-Woo
    • Applied Chemistry for Engineering
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    • v.5 no.3
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    • pp.419-424
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    • 1994
  • An oil stain on the steel induced by metal working oil was studied on the six kinds of fat and oil compounds(rapeseed oil, oleic acid, methyl oleate, oleyl alcohol, lauryl amino, and lanolin) by MIL-C-22235A test. The samples used for the printing on the oil stain plates were prepared by the addition of fat and oil compounds(10wt% ) and antioxidants(B. H. T, B. T, T. C. P; 0.5wt%) to base oil(spindle oil; 1.5wt% of sulfur). An analysis based on the experimental data indicated that B.T was more effective than B. H. T and T. C. P as antioxidant for inhibiting oil stains. And acid values exerted a bad influence upon the preventation of oil stains. As expected by the chemical structure of fat and oil compound, oleic acid that could react with iron ions produced more stains on the steel pannel.

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Effects of Concentrate to Roughage Ratio on the Formation of cis-9, trans-11 CLA and trans-11-Octadecenoic Acid in Rumen Fluid and Plasma of Sheep When Fed High Oleic or High Linoleic Acid Oils

  • Wang, J.H.;Choi, S.H.;Song, M.K.
    • Asian-Australasian Journal of Animal Sciences
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    • v.16 no.11
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    • pp.1604-1609
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    • 2003
  • A metabolism trial with four ruminally fistulated sheep was conducted in a $4{\times}4$ Latin square design to examine the effect of concentrate to roughage ratio (70:30 vs. 85:15) and oil source (soybean oil vs. rapeseed oil) on the ruminal fermentation pattern and $C_{18}$-fatty acids composition including trans11-$C_{18:1}$ (trans11-ODA) and cis9, trans11-18:2 (cis9, trans11-CLA) in the rumen fluid and plasma. Oil was added to the concentrate at 5% level of the total diet (DM basis) and chopped rye grass hay was fed as roughage. An increased level of concentrate (85%) within supplemented oil slightly lowered pH but increased ammonia concentration. Supplementation of rapeseed oil relatively increased pH and ammonia concentration. Higher concentrate level resulted in increased tendencies of total VFA concentration while oil source did not affect the total VFA concentration and VFA proportion. Whole tract digestibilities of DM, CP, EE, NDF and OM in diets slightly increased at higher concentrate level. Proportions of oleic acid ($C_{18:1}$) and linoleic acid ($C_{18:2}$) in the rumen fluid were influenced by the fatty acid composition of oil source but oil source did not affect the in vitro formations of trans11-ODA and cis9, trans11-CLA. Slightly increased trans11-ODA and cis9, trans11-CLA proportions, however, were observed from the sheep fed high roughage diet supplemented with both soybean oil and rapeseed oil. The $C_{18:1}$ and $C_{18:2}$ composition in supplemented oils responded to those in plasma of sheep. Effects of concentrate to roughage ratio and oil source on trans11-ODA and cis9, trans11-CLA proportions in plasma were found to be small. Proportion of cis9, trans11-CLA in plasma tended to be increased from the sheep fed high roughage diet and collection time at 9h post feeding.

Quality Characteristics of Rapeseed Oils according to Different Roasting Temperatures (볶음온도에 따른 유채유의 품질특성)

  • Da-Hee An;Gyeong-Dan Yu;Kwang-Soo Kim;Young-Lok Cha;Jae-Hee Jeong;Ji-Bong Choi;Koan Sik Woo;Eom-ji Hwang;You-Jin Park
    • The Korean Journal of Food And Nutrition
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    • v.36 no.6
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    • pp.479-488
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    • 2023
  • In this study, quality properties of rapeseed oil by different roasting temperatures (140, 160, 180, and 200℃) were investigated. Roasted-pressed oil (RPO) showed a decrease in lightness and an increase in redness and yellowness with an increase in temperature compared to cold-pressed oil (CPO). In addition, the β-carotene and tocopherol content also increased in RPO as the roasting temperature increased. The tocopherol content increased by 18~20% in RPO at 200℃ compared to CPO. This increase in bioactive components led to improved radical scavenging activity dependent on roasting temperature, and RPO at 200℃ showed a 2.7-fold improvement compared to CPO. Finally, it was observed that higher roasting temperatures resulted in an extended oxidation induction period, increasing by up to 3.3 times. In conclusion, roasting is an effective method for enhancing the oil functionality of domestic rapeseed varieties. This study provides basic data for producing high-quality oil.

Evaluation of vegetable oil rancidity by headspace gas chromatographic analysis (Headspace 가스크로마토그라피를 이용한 식용유의 산패도 측정)

  • Chun, Ho-Nam;Kim, Ze-Uook
    • Applied Biological Chemistry
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    • v.35 no.1
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    • pp.36-41
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    • 1992
  • Several commercial cottonseed, corn and rapeseed oils were stored at $60^{\circ}C\;and\;70^{\circ}C$ with daily exposure of fluorescent light for 12 hours and evaluated their rancidity by headspace gas chromatographic analysis of pentanal and hexanal. The data of gas chromatographic analysis was compared with organoleptic flavor evaluation. For headspace gas chromatographic analysis, the volatile compounds were recovered by porous polymer trap and flushed into a fused silica capillary column at $250^{\circ}C$. Twenty-three GC peaks were identified on the basis of relative retention time of reference compounds and gas chromatography-mass spectrometry. The results showed that the contents of pentanal and hexanal were linearly increased during storage. A very simple linear relationship was found between organoleptic flavor scores and amounts of two volatile compounds with very high correlation coefficient. This results suggested the possible implication of pentanal and hexanal as an quality index for rancidity evaluation of cottonseed, corn and rapeseed oils.

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