• 제목/요약/키워드: conjugated linoleic acid

검색결과 356건 처리시간 0.047초

지방급원 형태와 수준에 따른 연속배양장치 내 반추위 발효성상, 지방산의 수소첨가 현상 및 Conjugated Linoleic Acid 생산에 미치는 영향 연구 (Effects of Type of Oilseed and Level of Concentrate on Fermentation, Biohydrogenation of Fatty Acids and Conjugated Linoleic Acid Production in a Rumen-Simulated Continuous Culture System)

  • 최낙진
    • Journal of Animal Science and Technology
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    • 제45권4호
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    • pp.617-626
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    • 2003
  • 본 연구는 사료 내 농후사료의 비율을 높임으로서 불포화 지방산의 반추위 내 by-pass율의 향상 가능성을 조사하고, 아마종실과 전지대두 급여 시 CLA 생산을 상호 비교하기 위하여 연속배양장치를 이용하여 수행하였다. 지방 급원에 따른 발효 성상의 차이는 보이지 않았다. 한편 사료 내 농후사료 비율이 높은 (80%) 처리구는 농후사료 비율이 낮은 (40%) 처리구와 비교하여 pH는 감소하였으나, 암모니아, 총 휘발성 지방산, acetate, butyrate 및 valerate 농도가 증가되었다. 지방급원 (전지대두 vs 아마종실)과 사료 내 농후사료 비율은 organic matter (OM), total nitrogen, neutral detergent fiber (NDF) 및 acid detergent fiber (ADF)의 소화율에 영향을 끼치지 않았다. 반면에 전지대두는 아마종실과 비교하여 trans C18:1, C18:2 n-6 및 C18:3 n-3 유출율은 증가시켰다. 지방 급원에 의한 CLA flow는 영향을 받지 않았으나 사료 내 농후사료 비율이 높을 때와 전지대두와 아마종실의 함량이 높았을 때는 증가되었다. 수소 첨가현상은 C18:1 n-9 와 C18:2 n-6에서 지방 급원에 의하여 영향을 받지 않았으나, 아마종실 처리구에서는 C18:3 n-3 과 총 C18 불포화지방산의 수소 첨가현상이 전지대두 처리구와 비교하여 높은 비율로 발생했다. 한편 사료 내 농후사료 비율이 높을 때 처리구에서 C18:2 n-6, C18:3 n-3 및 총 C18 불포화 지방산의 수소 첨가현상은 농후사료 저 처리구와 비교하여 감소되었다.

염기 처리된 montmorillonite를 이용한 다이머산 메틸에스테르의 합성 (Synthesis of Dimer Acid Methyl Ester Using Base-treated Montmorillonite)

  • 육정숙;신지훈;김영운
    • Tribology and Lubricants
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    • 제35권2호
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    • pp.132-138
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    • 2019
  • In this study, we demonstrate the effects of the acidic properties of montmorillonite (MMT), which is commonly used as a catalyst, on the conversion and selectivity of the dimer acid methyl ester (DAME) synthesis. We synthesize DAME by the dimerization of conjugated linoleic acid methyl ester (CLAME) and oleic acid methyl ester using MMT KSF. Incidentally, trimer acid methyl ester was formed as a by-product during the DAME synthesis. There is a necessity to adequately adjust the strength and quantity of the acid site to control the selectivity of DAME. Therefore, we vary the pH of the MMT acid by using various metal hydroxides. The purpose of this study is to increase the yield of monocyclic dimer acid methyl ester, which is a substance with adequate physical properties for industrial applications (e.g., lubricant and adhesive, etc.), using a heterogeneous catalyst. We report the dimerization of fatty acid methyl ester by using base treated-KSF, and apply it to conjugated soybean oil methyl ester. Then, we transmute the acid site properties of KSF, such as pH of 5 wt.% slurry KSF and various alkali metals (Li, Na, K, Ca). Characterization of base treated-KSF using a pH meter, x-ray diffraction, inductively coupled plasma-atomic emission spectrometer, Brunauer-Emmett-Teller surface analysis, and temperature-programmed desorption. We conduct an analysis of CLAME and DAME using nuclear magnetic resonance spectroscopy, gas chromatography, and gel permeation chromatography. Through these experiments, we demonstrate the effects of the acidic properties of KSF on the conversion and selectivity of the DAME synthesis, and evaluate its industrial potential by application to waste vegetable oil.

Effect of Dietary Conjugated Linoleic Acid on Growth, Lipid Class, and Fatty Acid Composition in Rainbow Trout(Oncorhynchus mykiss)

  • Guo, Rui;Jeong, U-Cheol;Kang, Seok-Joong;Choi, Yeung-Jun;Choi, Byeong-Dae
    • Fisheries and Aquatic Sciences
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    • 제11권3호
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    • pp.125-132
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    • 2008
  • The development of a fish that functionally provides both antioxidant and fat-reducing effects is an important goal in nutrition and aquaculture research. Dietary conjugated linoleic acid(CLA) can be successfully incorporated in fish muscle and viscera, but CLA and carotenoids have not been evaluated in such fish. An 8 weeks growth trial was conducted using rainbow trout, and all fish were fed twice daily with experimental diets containing graded amounts of CLA(1% and 5%). At the end of the experiment, the daily growth index, feed conversion rate, lipid class, and fatty acid composition were determined. Dietary CLA did not enhance the growth parameters of rainbow trout but did improve the feed conversion rate. The muscular polar lipid content decreased during the feeding period, while the content was stable in the viscera. In addition, a diet high in CLA decreased the polyunsaturated fatty acid content, but had no effect on the content of monounsaturated and saturated fatty acid in muscle.

Anti-angiogenic activity of conjugated linoleic acid on the basic fibroblast growth factor-induced angiogenesis

  • Moon, Eun-Joung;Lee, You-Mie;Kim, Kyu-Won
    • 대한약학회:학술대회논문집
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    • 대한약학회 2002년도 Proceedings of the Convention of the Pharmaceutical Society of Korea Vol.2
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    • pp.337.2-337.2
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    • 2002
  • Conjugated linoleic acid (CLA) is a potent inhibitor of mammary carcinogenesis. Cancer cells produce various angiogenic factors which stimulate host vascular endothelial cell mitogenesis and chemotaxis for their growth and metastasis. Basic fibroblast growth factor (bFGF) is a potent angiogenic factor that is expressed in many tumors. In this study. we found that CLA decreased bFGF-induced endothelial cell proliferation and DNA synthesis in a dose-dependent manner. However, CLA did not inhibit endothelial cell migration. Furthermore CLA showed a potent inhibitory effect on embryonic vasculogenesis and bF GF-induced angiogenesis in vivo. Collectively. these results suggest that CLA selectively inhibis the active proliferating endothelial edll induced by bFGF. which may explain its anti-carcinogenix properties in vivo.

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대두유로부터 Lipase를 이용한 재구성 지질의 합성 및 특성 (Lipase-Catalyzed Synthesis of Structured Lipids with Capric and Conjugated Linoleic Acid in a Stirred-Batch Type Reactor)

  • 신정아;이기택
    • 한국식품영양과학회지
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    • 제33권7호
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    • pp.1175-1179
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    • 2004
  • Scale-up하기 위하여 24시간동안 1:2:2의 몰 비율로 stirred-batch type reactor에서 합성된 재구성지질은 capric acid와 CLA를 각각 4.9 mol%와 4.1 mot% 함유하였다. 기능성 지방산인 capric acid와 CLA는 주로 TAG의 sn-1,3 position에 분포하였고, sn-2 position에는 linoleic acid가 대부분을 차지하였다. 재구성지질과 대두유의 요오드가는 각각 126와 114이었고, 비누화가는 각각 190과 194로 측정됨으로써, 재구성 지질의 TAG에서 capric acid의 함유를 확인할 수 있었다. 대두유와 재구성지질의 tocopherol함량은 각각 74.6 mg/100 g과 18.2 mg/100 g으로, 재구성지질의 tocopherol 함량은 대두유보다 약 76% 감소하였다. 색도분석 결과, 재구성 지질과 대두유간에 백색도(L*)와 적색도(a*)에서는 유의적 차이가 없었으나(p<0.05),황색도(b*)에서 재구성지질이 대두유보다 좀더 yellowness를 보이며 유의적 차이를 보였다. (p<0.05). Reversed-phase HPLC 분석 결과, 재구성지 질에서 capric acid를 함유하고 있는 TAG형태의 partition number (PN)는 25∼37로 약 12.57 area%이었음을 확인하였다. 대두유의 주된 crystallization peak는 -57.86$^{\circ}C$C이었으나, capric acid를 4.9 mol% 함유하고 있는 재구성지질의 crystallization peak는 -52.78$^{\circ}C$로 대두유보다 결정화가 좀더 고온에서 일어났다.

The In vitro Effects of Nano-encapsulated Conjugated Linoleic Acid on Stability of Conjugated Linoleic Acid and Fermentation Profiles in the Rumen

  • Heo, Wan;Kim, Eun Tae;Cho, Sung Do;Kim, Jun Ho;Kwon, Seong Min;Jeong, Ha Yeon;Ki, Kwang Seok;Yoon, Ho Baek;Ahn, Young Dae;Lee, Sung Sill;Kim, Young Jun
    • Asian-Australasian Journal of Animal Sciences
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    • 제29권3호
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    • pp.365-371
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    • 2016
  • This study was aimed to evaluate the stability of conjugated linoleic acids (CLAs) by nano-encapsulation against in vitro ruminal biohydrogenation by microbial enzymatic conversion. CLAs (free fatty acid form of CLA [CLA-FFA], nano-encapsulated CLA-FFA, triglyceride form of CLA [CLA-TG], and nano-encapsulated CLA-TG) were used in the in vitro fermentation experiments. When Butyrivibrio fibrisolvens (B. fibrisolvens) was incubated with CLA-FFAs, the concentrations of cis-9, trans-11 CLA and vaccenic acid (VA) slightly was decreased and increased by nano-encapsulation, respectively. When B. fibrisolvens was incubated with CLA-TG, the concentrations of cis-9, trans-11 CLA and VA decreased, but these were increased when B. fibrisolvens was incubated with nano-encapsulated CLA-TG. The nano-encapsulation was more effective against the in vitro biohydrogenation activity of B.fibrisolvens incubated with CLA-FFA than with CLA-TG. In the in vitro ruminal incubation test, the total gas production and concentration of total volatile fatty acids incubated with nano-encapsulated CLA-FFA and CLA-TG were increased significantly after 24 h incubation (p<0.05). Nano-encapsulated CLA-FFA might, thus, improve the ruminal fermentation characteristics without adverse effects on the incubation process. In addition, nano-encapsulated CLA-FFA increased the population of Fibrobacter succinogenes and decreased the population of B. fibrisolvens population. These results indicate that nano-encapsulation could be applied to enhance CLA levels in ruminants by increasing the stability of CLA without causing adverse effects on ruminal fermentation.

CLA (Conjugated linoleic acid) 급이수준에 따른 역돔의 CLA 축적량 (Accumulation of the Conjugated Linoleic Aacid (CLA) in Tilapia ( Tilapia nilotica) Fed Diets on Various Levels of CLA)

  • 최병대;강석중;하영래
    • 한국수산과학회지
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    • 제34권5호
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    • pp.509-514
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    • 2001
  • 기능성물질인 CLA를 양어사료에 첨가하여 기존의 어류와는 다른 기능성 역돔 생산을 시도하였다. 사육 8주간 매 2주마다 어체내의 CLA축적도를 측정한 결과 8주 후 $1\%$ CLA 첨가구에서는 41.3 mg/g of fat였으며, $10\%$ CLA 첨가구에서는 180.9mg/g of fat으로 역돔의 정상적인 성장을 고려하지 않는다면 $10\%$의 사료내 첨가도 가능한 것으로 생각된다. 그러나 정상적인 성장을 고려하면 CLA의 적정 첨가량은 $1\%$로 나타났으며, 그 이상의 첨가시에는 성장 저하 현상을 나타내었다. 합성된 CLA는 총 6 종류의 이성체로 구성되어 있었고, 그 중 c9, t11 및 t10, c12 이성체가 $85\sim90\%$를 이루고 있었으며, 첨가된 CLA 함량에 따라 축적되는 양도 달라졌다. 사육 8주 후, 육 및 간 중의 지방산 조성은 n-9, 3 계열은 거의 화를 나타내지 않았으나, n-6계열은 첨가된 CLA의 함량에 따라 육 및 간에 축적되는 양은 $5\sim27\%$로, $1\%$ CLA 첨가구가 가장 높았고, $10\%$ CLA 첨가구가 가장 낮은 함량비를 나타내었다.

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