• Title/Summary/Keyword: oleic acid

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Determination of the Adulteration of Sesame Oils Sold in Markets by Gas Chromatography (시중 참기름에 혼입된 이종기름에 관하여)

  • 유영찬;박유신;정희선;정진일
    • Journal of Food Hygiene and Safety
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    • v.7 no.1
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    • pp.29-36
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    • 1992
  • This study primarily attempted to establish the method for the determination of the adulteration in the sesame oil. First of all, extensive experiment was conducted to determine the composition of genuine sesame oil prepared from Korean, Japanese, Taiwanese and Chinese sesame seed. Sesamin and sterols in unsaponfiable matter were examined along with fatty acid in saponifiable fraction by Gc. There was no significant difference in the composition of sesamin and sterols in sesame oils prepared from Korean and foreign seeds. The ranges of sesamin and ${\beta}-sitosterol$ against campesterol were 3.32~5.46 and 2.39~2.99 respectively in all samples. Similiar composition of fatty acids was showed in all pure sesame oils, in which the contents were 8.37~lO.09% palmitic acid, 4.61~5.50% stearic acid, 35.24~39.97% oleic acid, 43.04~49.76% linoleic acid, O.21~O.31% linolenic acid and 0.40~O.69% arachidic acid. Among the commercial sesame oils sold in Markets, three sesame oils from Japan revealed low sesamin, high linoleic acid and linolenic acid, and low oleic acid and stearic acid, suggesting the adulteration with soybean oil.

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A Study on the Changes of Fatty Acid Composition of Phospholipid and Glycolipid during Storage Period of Kaesojoo (저장기간에 따른 개소주의 Phospholipid 및 Glycolipid의 지방산 변화에 관한 연구)

  • 박창일;김영직;김영길
    • Food Science of Animal Resources
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    • v.18 no.4
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    • pp.332-338
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    • 1998
  • This experiment was carried out to investigate the changes in phospholipid and glycolipid of Kaesojoo and Kaesojoo added medicinal herbs during storage(30 days) at 4$^{\circ}C$and -18$^{\circ}C$. Two dogs with 12kg live weight(♀, The Korean Jindo dog Hy-breed, 11∼12 month) were slaughtered to obtain samples. The result obtained were as follows: The saturated fatty acids found in phospholipid of Kaesojoo were palmitic acid, stearic acid, myristic acid, while the unsaturated fatty acid found in phospholipid of Kaesojoo with medicinal herbs were palmitic acid, stearic acid, arachidonic acid, while the unsaturated fatty acid were mostly oleic acid, increased during the period of storage. The saturated fatty acid found in glycolipid obtained from Kaesojoo were mostly oleic acid, linoleic acid and linolenic acid. The saturated fatty acid obtained from Kaesojoo with medicinal herbs were palmitic acid, stearic acid, while the unsaturated fatty acid were mostly oleic acid, linoleic acid and linolenic acid. The rates of changes in unsaturated and saturated fatty acid were higher at 4$^{\circ}C$ than that of -18$^{\circ}C$ during storage.

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A Comparative Study on the Compositions of Fatty Acids and Sterols of Hirneola auricula-Judae and Gyrophora esculenta (한국산(韓國産) 목이(木耳)와 석의(石衣)의 지방산(脂肪酸) 및 스테롤 성분(成分) 조성(組成)에 관(關)한 비교(比較) 연구(硏究))

  • Nam, Jung-Won;Ko, Young-Su
    • Korean Journal of Food Science and Technology
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    • v.12 no.1
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    • pp.6-12
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    • 1980
  • Compositions of fatty acid and sterol of Hirneola auricula-Judge and Gyrophora esculenta produced is Korea were analyzed by gas liquid chromatographic(GLC) and infra red(IR) spectro-photometric techniques. As results, H. auricula showed linoleic acid 33.73, palmitic acid 15.52, stearic acid 5.03, oleic acid 16.03, linolenic acid 17.80, and unknown acid 11.89 % respectively, in their composition, while G. esculenta linoleic acid 46.35, palmitic acid 31.71, oleic acid 16.82, unknown acid 5.12 %, and trace of stearic and linolenic acids, respectively. Sterols were separated by thin layer chromatographic technique from both samples and identified by IR analysis. Two sterols, sitosterol and ergosterol, were present in both samples.

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Studies on the Nutritional Value of the Edible Earthworm (III) (식용(食用)지렁이의 영양가(營養價)에 대(對)한 연구(硏究)(III))

  • Lee, Hyun-Ki
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.15 no.2
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    • pp.115-118
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    • 1986
  • This study was carried out to obtain an information for the earthworms (Lumbricus terrestris) as total lipid, three lipid classes and their fatty acid compositions. Total lipids of earthworm consisted of 35.14% of neutral lipids, 41.74% of glycolipids and 23.12% of phospholipids. A wide variety of fatty acid esters ranging from $C_{10}\;to\;C_{22}$were identified and lower fatty acids than $C_{10}$ detected but not identified. In the neutral lipid, the major fatty acids were lauric acid, oleic acid, myristic acid and caproenoic acid. The fatty acid composition in the glycolipid was specific, so caproic acid content was 25.8% and unknown lower fatty acids than that were 23.22%. In the phospholipids, the major fatty acids were oleic acid, caproic acid, linolenic acid and behenic acid. Unsaturated fatty acid contents in the phospholipids were higher than in the neutral and glycolipids.

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Ameliorating Effects of Lactic Acid-fermented Garlic Extracts on Oleic Acid-induced Hepatic Steatosis (유산균 발효 마늘 추출물의 oleic acid로 유도된 비알코올성 지방간에 대한 개선 효과)

  • Lee, Hee-Seop;Lim, Won-Chul;Choi, Ji-Hwi;Yu, Heui-Jong;Kim, Ki-Ho;Lee, Seung-Hyun;Cho, Hong-Yon
    • Korean Journal of Food Science and Technology
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    • v.46 no.6
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    • pp.762-768
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    • 2014
  • In this study, the ameliorating effects of lactic acid-fermented garlic extract (LAFGE) on non-alcoholic fatty liver were investigated using oleic acid-induced steatotic HepG2 cells. The ameliorating mechanism was analyzed by RT-PCR and Western blot. Treatment with 1 mg/mL LAFGE decreased intracellular lipid accumulation approximately 1.5-fold, compared to that achieved with non-fermented garlic extract. LAFGE reduced fatty acid influx into hepatocytes through down-regulation of FAT/CD36 mRNA expression in the steatotic HepG2 cells. $PPAR{\alpha}$ and CPT-1 mRNA expression was significantly up-regulated by LAFGE treatment of HepG2 cells as a consequence of activation of beta oxidation. Additionally, the treatment with 1 mg/mL LAFGE highly down-regulated mRNA expression of SREBP-1c and FAS to 51% and 35%, respectively. LAFGE showed concentration-dependent down-regulation patterns in protein expression of SREBP-1c and FAS, as determined by Western blot. These results suggest that LAFGE treatment improves hepatic steatosis triggered by the imbalance of hepatic lipid metabolism owing to oleic acid treatment.

Studies on the Eco-friendly Management of Whiteflies on Organic Tomatoes with Oleic Acid (토마토 유기농 시설재배에서 올레산을 이용한 친환경적인 가루이류 방제 효과)

  • Lee, Mun-Haeng;Kim, Sung-Eun;Kim, Young-Shik;Lee, Hee-Keyng;Lee, Hwan-Gu;Jee, Hyung-Jin;Kim, Yong-Ki;Shim, Chang-Ki;Kim, Min-Jeong;Hong, Sung-Jun;Lee, Youn-Su
    • Korean Journal of Organic Agriculture
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    • v.21 no.1
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    • pp.95-104
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    • 2013
  • This research was performed to test the effects of oleic acid for the management of greenhouse whiteflies and tobacco whiteflies. Tobacco whiteflies, especially, are the vectors of tomato yellow leaf curl virus on tomato plants. Whiteflies are not only the vectors of various viruses but also the major insect pests that cause direct damages through sucking and induce sooty mold with their sweet dew on tomato plants. There are many eco-friendly management measures including the use of yellow sticky trap and natural enemies such as Eretmocerus eremicus and Amblyseius swirskii. However, these management measures have difficulties to implement in the greenhouse. Therefore, in this research, oleic acid was tested for its effect on the management of whiteflies at various concentrations of 1,000ppm, 2,000ppm, or 4,000ppm. As a result, treatments of 1,000ppm, 2,000ppm and 4,000ppm oleic acid showed the control value of 70%, 76% and 84%, respectively. In another test, treatments of 2,000ppm oleic acid, and control treatment of 1,5000ppm neem oil and 50ppm dinotefuran showed the control value of 82%, 75%, and 75%, respectively. Cost for one application of oleic acid and neem oil for 10a area would be 3,180 Won and 20,150 Won, respectively. As a result, it was assumed that the use of oleic acid would be a appropriate management measure.

Effects of Riboflavin-photosensitized Oxidation on the Formation of Volatile Compounds in Oleic Acid Model Systems (리보플라빈 광산화에 의한 올레산 모델시스템에서 휘발성 물질 발생연구)

  • Yang, Seung-Ok;Chang, Pahn-Shick;Lee, Jae-Hwan
    • Korean Journal of Food Science and Technology
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    • v.37 no.5
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    • pp.717-722
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    • 2005
  • Formation mechanisms of light-induced volatile compounds were studied using riboflavin-photosensitized oleic acid model systems. Volatile compounds in model systems with 4000 ppm riboflavin at $35^{\circ}C$ under light or in the dark for 39 hr were isolated and identified by a combination of solid phase microextraction (SPME), gas chromatography (GC), and mass spectrometry (MS). Total volatiles in oleic acid with riboflavin under light for 13, 26, and 39 hr increased by 90, 190, and 270%, respectively, compared to those in oleic acid without riboflavin under light. Total volatiles in samples without riboflavin under light or samples with riboflavin in the dark were not significant in tested conditions (p>10.05). Riboflavin did not act as a photosensitizer when it was dispersed in oleic acid. Heptane, octane, heptanal, octanal, nonanal, and 2-nonenal were significantly increased in riboflavin-photosensitized samples compared to those in samples without riboflavin (p<0,05). Light-induced volatile compounds including heptanal and 2-nonenal from oleic acid could be explained using singlet oxygen oxidation, the formation mechanism of which were not understood using triplet oxygen oxidation. These results will help to understand volatile formation in oleic acid containing foods stored under light.

Analysis of Chemical Components of Korean Loquat (Eriobotrya japonica Lindl.) Fruit (국내산 비파 열매의 화학적 성분 분석)

  • Lee, Boo-Yong;Park, Eun-Mi;Kim, Eun-Jeong;Choi, Hee-Don;Kim, In-Hwan;Hwang, Jin-Bong
    • Korean Journal of Food Science and Technology
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    • v.28 no.3
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    • pp.428-432
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    • 1996
  • The chemical components of Korean loquat (Eriobotrya japonica Lindl.) fruit were analysed. Approximate compositions of loquat flesh and seed were as follows. respectively crude lipid 0.53% and 0.83%, crude protein 0.05% and 5.27%, crude fiber 3.46% and 3.49%, crude ash 3.24% and 2.78%, carbohydrate 92.72% and 87.63% Soluble solids content, pH and acidity (citric acid) of loquat flesh juice were $12^{\circ}Bx$ by saccharometer, 4.43 and 0.18%, respectively. Free sugar compositions of loquat flesh and seed extracts $(3^{\circ}Bx)$ were as follows, respectively; fructose 0.77% and 0.31%, glucose 0.73% and 0.79%, sucrose 0.52% and 0.19%, ribose and 0.56%, Loquat flesh contained Glu 336.72 mg%, Asp 251.06 mg%, Arg 30.90 mg% and Lys 5.26 mg% Loquat seed contained Glu 448.23 mg%, Asp 335.63 mg%, lle 44.20 mg% and His 37.89 mg%, Potassium (k) contents of loquat flesh and seed were 32627.95 mg% and 28936.28 mg% in total amount of crude ash, while vitamin A and C of loquat flesh and seed were not detected. Composition of major lipid of loquat fruit seed oils fractionated by silicic acid was neutral lipids 43.78%, glycolipids 12.32% and phospholipids 43.90%, Fatty acid compositions of loquat seed lipid extracted by chloroform-methanol (2 : 1) were as follow; palmitic acid 23.72%, stearic acid 3.815, oleic acid 8.55%, linoleic acid 54.29% and linolenic acid 9.63%, Neutral lipids consist of palmitic acid 28.89, stearic acid 6.80%, oleic acid 11.07%, linoleic acid 40.67% and linolenic acid 12.58%, Glycolopids cinsist of palmitic acid 13.21%, stearic acid 4.56%, oleic acid 6.53%, linoleic acid 64.92% and linolenic aicd 10.77% Phospholipids consist of palmitic acid 30.95%, stearic acid 3.40%, oleic acid 9.09%, linoleic acid 48.45% and linolenic acid 8.10%.

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The Effects of Metal Compounds on the Phospholipid Metabolism in Bacillus subtilis;

  • Ma, Hye-Young;Jung, Kyung-Suk;Jang, Jae-Seon;Lee, Chong-Sam
    • Journal of Environmental Health Sciences
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    • v.23 no.2
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    • pp.1-11
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    • 1997
  • The synthesis of phospholipid and the composition of fatty acid in B. subtills treated with copper chloride (10 ppm), manganese chloride (100 ppm), and nickel chloride (50 ppm) during the culture were analyzed to compare with the control. The levels of growth, total lipid, phosphatidylethanolamine(PE), phosphatidylcholine(PC), phosphatidylglycerol(PG), and cardiolipin(CL) in B. subtilis treated with copper chloride were decreased predominantly. But, the biosynthesis of phosphatidylinositol(PI) was not affected by the metal compounds. The major fatty acids utilized for the formation of phospholipid were palmitic acid(average 19.00%) and stearic acid(average 9.88%) in the control. In the copper chloride treatment, however, palmitic acid (average 17.35%) and oleic acid(average 15.99%) made use of the major fatty acid during the biosynthesis of phospholipids. It was showed that oleic acid(average 17.87%) and stearic acid (average 13.78%) in thee manganese chloride treatment, and palmitic acid(average 15.00%) and myristic acid(average 14.24%) in the nickel chloride treatment were utilized.

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Seed Protein Content and Fatty Acid Composition of Soybeans collected from Southwestern Islands in Korea

  • Kwon, Byung-Sun;Shin, Jeong-Sik;Choi, Seong-Kyu
    • Plant Resources
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    • v.5 no.3
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    • pp.181-186
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    • 2002
  • The 129 soybean genotypes were collected in 43 island locations from January to May 2001. Seeds of 129 genotypes collected were analyzed for crude protein and fatty acid composition contents. The crude protein content was averaged to 41.1 % and ranged from 37.4% to 44.4%. The average palmitic acid, stearic acid, oleic acid, linoleic acid and linolenic acid content were 12.0%, 4.0%, 23.2%, 55.5%, and 7.9%, and the ranges of those were 10.0% to 15.0%, 3.0% to 4.8%, 21.7% to 25.5%, 50.2% to 58.3% and 7.0% to 12.0%, respectively. Heritabiliries of palmitic acid, oleic acid, linoleic acid, and crude protein were higher, but that of stearic acid and linolenic acid were relatively lower. The genotypic correlation coefficients between crude protein and oleic acid showed highly positive correlation, but that of linoleic acid showed highly opsitive correlation, but that of linoleic acid showed highly negative correlation and also palmitic acid, stearic acid and linolenic acid showed negative correlation.

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