• Title, Summary, Keyword: Conjugated Linoleic Acid

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Isolation and Identification of Rumen Fungus and Its Produced Conjugated Linoleic Acid (반추위에서 분리한 곰팡이의 Conjugated Linoleic Acid 생산과 ITS-1 영역의 염기서열 해석)

  • Nam, In-Sik
    • Korean Journal of Microbiology
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    • v.43 no.2
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    • pp.111-115
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    • 2007
  • The aim of this study was to isolate and identify men fungus which produces conjugated linoleic acid. IS-13 fungus hydrogenated conjugated linoleic acid and trans-11 vaccenic acid within 12 hr after addition of linoleic acid. The homology of IS-13 rumen fungus was compared with internal transcribed spacer 1 region (ITS1)sequences of twenty three men fungi. The length of ITS1 region of IS-13 isolate was 218 bp. IS-13 isolate has the most similar sequence (98% matched) with Orpinomyces species according to maximum-likehood and distance matrix results. The result supported that IS-13 isolate belonged to Orpinomyces genus.

Effects of Soybean Oil or Rumen Protected Conjugated Linoleic Acid Supplementation on Accumulation of Conjugated Linoleic Acid in Dairy Cows' Milk

  • Suksombat, Wisitiporn;Chullanandana, Khukbuan
    • Asian-Australasian Journal of Animal Sciences
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    • v.21 no.9
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    • pp.1271-1277
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    • 2008
  • The effects of feeding soybean oil (SBO) or rumen protected conjugated linoleic acid (RP-CLA) on CLA accumulation in milk, and performance of lactating dairy cows were studied. Twenty four Holstein Friesian crossbred lactating dairy cows, averaging $126{\pm}45days$ in milk, $15.6{\pm}2.43kg$ of milk and $452{\pm}51kg$ body weight were stratified randomly and assigned in a randomized complete block design (RCBD) to three treatments of 8 cows each. The treatments were control, 150 g of SBO and 150 g of RP-CLA supplementation. Performance parameters showed that DM intake, NELP intake and body weight change were similar across treatments, while CP intake was decreased by SBO and RP-CLA supplementation. Milk yield and milk composition were not significantly different among treatments, except for milk fat percentage and fat yield which were significantly decreased by 27% (p<0.05) and by 28% (p<0.01), respectively, by RP-CLA supplements compared with control treatment. Feeding RP-CLA reduced 3.5% FCM compared with the other treatments (p<0.003). Both SBO and RP-CLA supplementation reduced ${\geq}C18:0$ and CLA concentration in milk fat.

Effect of Conjugated Linoleic Acid on Fatty Acid Composition and Lipid Oxidation of Egg Yolk (난황내 Conjugated Linoleic Acid가 지방산 조성과 지방산화에 미치는 효과)

  • Park, Gu-Boo;Lee, Jeong-Il;Ha, Yeong-Lae;Kang,Seuck-Joong;Jin, Sang-Keun;Joo, Seon-Tea
    • Food Science of Animal Resources
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    • v.18 no.4
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    • pp.339-347
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    • 1998
  • The effects of conjugated linoleic acid (CLA) in egg yolk on fatty acid composition and lipid oxidation during chilled storage (4$^{\circ}C$) were investigated. CLA was synthesized according to the method of alkali isomerization using safflower seed oil (SSO). A total of 250 hens (200 days of age) were fed control diet (commercial formula feed for han) or CLA-supplemented diet (1%, 2.5% and 5% CLA) or 5% SSO supplemented diet for 6 weeks, and eggs were collected for analysis of CLA, fatty acid compositons and lipid oxidation. Eggs from CLA-supplemented diets groups showed significantly (p<0.05) higher CLA content compared to those of control group. The contents of linoleic, palmitic, and myristic acid were increased as well as CLA content by feeding a CLA-supplemented diet. However, the contents of oleic and arachidonic acids in egg yolks were decreased by dietary CLA supplementation. The pH of egg yolk increased by the levels of CLA during storage. The contents of CLA were not significantly (p<0.05) changed during chilled storage for 28 days, whereas TBARS were significantly (p<0.05) increased. It is suggested that lipid oxidation of egg yolk might be affected by the levels of CLA in egg yolk due to changes in fatty acid compositions.

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Preparation of Conjugated Linoleic Acid Concentrate from Vegetable Oils by Alkali Isomerization (유지의 알칼리 이성질화에 의한 Conjugated Linoleic Acid 농축물의 제조)

  • Kim, Ji-Ho;Shin, Hyo-Sun
    • Korean Journal of Food Science and Technology
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    • v.31 no.6
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    • pp.1453-1457
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    • 1999
  • The optimal conditions of alkali isomerization to obtain conjugated linoleic acid (CLA) concentrate from vegetable oils which have antioxidant and anticarcinogenic properties were studied. The result of alkali isomerization of various vegetable oils indicated that CLA content of safflower oil which contains more linoleic acid than any other vegetable oils was the highest of all experimental vegetable oils. During alkali isomerization, the amount of cis-9, trans-11 CLA and total CLA content in safflower oil was the highest at $8{\sim}11%$ KOH concentration and $180{\sim}185^{\circ}C$. But heating time had no effect on CLA formation after $20{\sim}40$ minutes. As a result of alkali isomerization of neutral lipid, glycolipid and phospholipid in safflower oil, CLA content of neutral lipid class was higher than any other lipid classes. By urea treatment and HPLC fractionation, total CLA content in alkali-isomerized safflower oil increased to 95.4% from 78.9%.

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Cis-9, trans-11-Conjugated Linoleic Acid in Dairy Goat Milk was Increased by High Linoleic (Soybean Oil) or Linolenic (Linseed Oil) Acid Diet

  • Choi, Seong-Ho;Kim, Jong-Kyu;Lee, Hong-Gu;Choi, Chang-Weon;Choi, Yang-Il;Song, Man-Kang
    • Food Science of Animal Resources
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    • v.33 no.4
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    • pp.487-492
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    • 2013
  • The objective of this study was to examine the effect of supplementation of high linoleic ($C_{18:2}$) oil or high linolenic ($C_{18:3}$) oil to the diet on milking performance and content of conjugated linoleic acid (CLA) isomers in goat milk fat. Forty five dairy goats (Sumnen, 25 d post-partum, $62.5{\pm}1.2kg$) were randomly assigned to three treatment groups with each group of 15 dairy goats. The goats were fed a basal diet (CON) consisting 1.2 kg concentrate and 1.2 kg chopped hay (0.6 chopped alfalfa and 0.6 kg hay) daily with 4% soybean oil (SO) or 4% linseed oil (LO). Daily feed intake was not influenced (p>0.05) but daily milk yield (p<0.001) and milk fat yield (p<0.001) were significantly increased by supplementation of oils. Supplementation of oils decreased the short chain fatty acid, medium-chain fatty acid and saturated fatty acid in goat milk fat while increased trans vaccenic acid (trans-11-$C_{18:1}$, TVA), oleic acid ($C_{18:1}$), $C_{18:2}$, $C_{18:3}$, cis-9, trans-11-CLA (c9, t11-CLA), trans-10, cis- 12-conjugated linoleic acid (t10, c12-CLA), unsaturated fatty acids, mono unsaturated fatty acid and long-chain fatty acid in goat milk fat (p<0.001). Especially, c9, t11-CLA, t10, c12-CLA and ${\omega}-3$ fatty acid ($C_{18:3\;n-3}$) in milk fat were highest when goat fed LO diet. Based on the result, it is suggested that supplementation of linseed oil should be an effective method to increase CLA isomers and ${\omega}-3$ fatty acid in goat milk fat without negative effect on lactating performance.

Bioconversion of Linoleic Acid to Conjugated Linoleic Acid by Bifidobacterium breve

  • Song Yoon-Seok;Kang Seong-Woo;Oh Deok-kun;Rho Yong-Taik;Hong Suk-In;Kim Seung-Wook
    • Biotechnology and Bioprocess Engineering:BBE
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    • v.10 no.4
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    • pp.357-361
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    • 2005
  • The bioconversion of linoleic acid (LA) to conjugated linoleic acid (CLA) was investigated to examine LA-adaptation of Bifidobacterium breve KCTC 3461 to additions of 1 to 5 mg/mL of LA overtime. To induce LA-adaptation, B. breve KCTC 3461 was treated with LA, according to three schemes. For LA-adapted B. breve the maximum concentration of CLA, $300\~350{\mu}g/mL$, was obtained in cys-MRS medium containing 1 mg/mL of LA. The CLA production significantly increased with increasing LA concentration, from 1 to 4 mg/mL, but the conversion of LA to CLA gradually decreased. The CLA production capability of B. breve, and its tolerance, improved significantly with LA-adaptation. The addition of LA (1 mg/mL) into the culture broth after 24 h of cultivation in a 100-mL media bottle was most effective at promoting CLA production. In a 2.5-L stirred-tank bioreactor, the observed conversion and productivity of $56.6\%\;and\;35.4{\mu}gmL^{-1}h^{-1}$, respectively, by LA-adapted B. breve were approximately 6.6 and 9.8 times higher than those of LA-unadapted B. breve.

Preparation of Conjugated Linolenic Acid from Urea Fractionated Perilla Seed Oil Hydrolysate (우레아 분별된 들기름 가수 분해물을 이용한 Conjugated Linolenic Acid(CLnA)의 합성)

  • Lee, Kyung-Su;Shin, Jung-Ah;Lee, Ki-Teak
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.40 no.12
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    • pp.1734-1742
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    • 2011
  • Conjugated linolenic acid (CLnA) and conjugated linoleic acid (CLA) are positional geometric isomers with three and two double bonds, respectively. In this study, perilla seed oil containing 60% ${\alpha}$-linolenic acid (C18:3) and 30% linoleic acid (C18:2) was used as a reaction substrate. After the perilla seed oil was hydrolyzed, conjugated fatty acids were synthesized using different reaction parameters, such as reaction time and concentration of sodium hydroxide. As a result, CLnA, CLA, and other newly synthesized conjugated isomers were present at levels of 14.5%, 14%, and 42.2%, respectively, when the reaction was performed with 20% NaOH, at $180^{\circ}C$, and for 1 hr. The results of GC-MS and fourier transform infrared spectroscopy (FT-IR) showed that CLnA isomer of cis-9, trans-11, and trans-13 octadecatrienoate, CLA isomer of cis-9, trans-11, and trans-10, cis-12 octadecadienoate, and other conjugated isomers were produced. Using urea, ${\alpha}$-linolenic acid could be concentrated from perilla seed oil hydrolysate. After concentration by urea, the concentration of ${\alpha}$-linolenic acid reached about 70%. After alkaline-isomerization was performed on the urea fraction containing 70% ${\alpha}$-linolenic acid, the content of CLnA increased up to 16.6%.