• Title/Summary/Keyword: 어유

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Omega-3 and -9 Fatty Acid Combination Effects on Broiler Chicks to Produce Chicks with High in Omega-3 Polyunsaturated Fatty Acid (오메가-3와 -9 지방산의 혼합 급이가 계육내 오메가-3 계열 다가불포화지방산의 조성에 미치는 영향)

  • Shin, Dae-Keun;Choi, Seung-Ho;Cho, Young-Moo;Park, Jae-Hong
    • Korean Journal of Poultry Science
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    • v.39 no.1
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    • pp.1-8
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    • 2012
  • To evaluate the effects of n-3 and n-9 fatty acid combination on broiler chicks, diets containing the combinations of five different fat sources including flaxseed oil, fish oil, EPA, DHA and olive oil were provided, and all chicks were processed at 4 weeks of growth. Liver, breast and thigh samples were collected and fatty acid composition and/or CIE $L^*$, $a^*$ and $b^*$ measurement were measured. Also, live chick and liver weights were weighed and the ratio was provided as an evidence of fat accumulation in liver. No significant difference was determined in both live and liver weight ratio and liver color. EPA was low in FHO as compared to livers from others. In contrast, DHA was significantly high in FHO. In broiler breasts derived from FDO, AA and n-3 fatty acid content was high, but only numerical differences of EPA and DHA were determined in breasts from FDO. The thighs from FHO showed high in EPA, DHA and n-3 fatty acid content but had low in AA and n-6 to n-3 ratio. Therefore, the results indicate that broiler chicken diets containing either FDO or FHO may be possible combination diets increasing n-3 polyunsaturated fatty acids in broiler chicks.

Esterification and Trans-esterification Reaction of Fish Oil for Bio-diesel Production (바이오디젤 생산을 위한 어유의 에스테르화 및 전이에스테르화 반응)

  • Lee, Young-Jae;Kim, Deog-Keun;Lee, Jin-Suk;Park, Soon-Chul;Lee, Jin-Won
    • Clean Technology
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    • v.19 no.3
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    • pp.313-319
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    • 2013
  • To produce biodiesel efficiently from fish oil containing 4% free fatty acid, esterification and trans-esterification were carried out with Vietnam catfish oil, which was kindly provided from GS-bio company. Heterogeneous solid acid catalysts such as Amberlyst-15 and Amberlyst BD-20 and sulfuric acid as homogeneous acid catalyst were used for the esterification of free fatty acids in the fish oil. Sulfuric acid showed the highest removal efficiency of free fatty acid and the shortest reaction time among three acid catalysts. The base catalysts for trans-esterification such as KOH, $NaOCH_3$ and NaOH were compared with each other and KOH was determined to be the best transesterification catalyst. Some solid material, which assumed to be saponified product from glycerol and biodiesel, were observed to form in the fish oil biodiesel when using $NaOCH_3$ and NaOH as the transesterification catalyst. The initial acid value of fish oil was proven to have a negative effect on biodiesel conversion. Of the three catalysts, KOH catalyst transesterification was shown to have high content of FAME and the optimal ratio of methanol/oil ratio was identified to be 9:1.

Deodorization of Purified Fish Oil from Squids by Organic Acids (유기산물 이용한 오징어 어유의 어취 개선)

  • Jang, Min-Kyung;Lee, Ok-Hee;Kim, Nam-Young;Yu, Ki-Hwan;Jang, Hye-Ji;Lee, Seung-Woo;Park, Mi-Ra;Park, Joung--Hyun;Kim, Mi-Hyang;Ha, Jong-Myung;Bae, Song-Ja;Lee, Sang-Hyeon
    • Journal of Life Science
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    • v.19 no.9
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    • pp.1284-1288
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    • 2009
  • To produce high quality fish oil products, additional deodorization experiments on purified fish oil from squid using columns filled with citric acid or gluconic acid were performed. A deodorization effect on the fish oil was observed on both the citric acid and gluconic acid columns. These effects were more efficient on the columns packed with 3 g of organic acid than those with 1 g or 2 g of organic acid. In addition, a better effect was observed in the column packed with gluconic acid than that with citric acid. Peroxide value (POV) and acid value (AV) of the sample treated with citric acid was the as same as the non-treated sample. However, POV and AV of the sample treated with gluconic acid were about 10% higher than the non-treated sample. Contents of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) of the samples treated with citric acid or gluconic acid columns were about 0.5% higher than the non-treated sample. In conclusion, deodorization of squid fish oil by organic acid could be an efficient method to produce high quality fish oil products.

Protective Effect of Soybean Sauce and Melanoidin on Lipid Oxidation in Rats Fed High PUFA Oils (고도불포화지방산 함량이 높은 유지를 섭취시킨 흰쥐에서 양조간장과 멜라노이딘의 지질산화 억제효과)

  • 이상조;류승희;이영순;송영선;문갑순
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.32 no.6
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    • pp.913-920
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    • 2003
  • Soybean sauce fermented with soybean and wheat, has been a major condiment of Korean diets from centuries ago. Melanoidin, a brown pigment generally found in various food systems, is a final product produced in amino-carbonyl reaction during soybean sauce processing. Antioxidative activities of soybean sauce and melanoidin were investigated in vitro system using linoleic acid emulsion. Soybean sauce and glucose-lysine model melanoidin showed the stronger antioxidative effect than control by ferric thiocyanate and conjugated diene assays. In addition, DPPH radical scavenging effect of soybean sauce was higher than melanoidin, which was ascribed to soluble peptide and low molecular protein existing in soybean sauce. To ascertain antioxidative effect of dietary soybean sauce and melanoidin in vivo, the male Wister rats were fed 10% soybean sauce or 10% glucose-lysine model melanoidin with corn oil or fish oil for 5 weeks. Fatty acid compositions in liver and plasma were influenced by oil source. Therefore, EPA and DHA contents of fish oil group were higher than those of corn oil group. When the inhibitory effect of soybean sauce and melanoidin on lipid peroxidation using TBARS methods was measured, fish oil group (FC) showed higher malondialdehyde (MDA) content than corn oil group (CC). However, supplementation of soybean sauce and melanoidin to fish oil group attenuated MDA formation. In the levels of phosphatidyl choline hydroperoxide (PCOOH) in liver and plasma by CL (chemiluminescence)-HPLC method, PCOOH in FC group was significantly higher than that of CC group both in liver and plasma. Supplementation of soybean sauce to fish oil groups significantly inhibited the formation of PCOOH in plasma and liver, while melanoidin suppressed hepatic PCOOH formation. Based on these results, it can be suggested that soybean sauce possesses stronger antioxidative potential than melanoidin.

Influence of Dietary n3 Polyunsaturated Fatty Acids on Plasma Lipid-Lowering Effect and Peroxidation Level In Rats (쥐에서 n3계 불포화지방산 식이의 혈장지질 저하효과와 과산화물형성에 미치는 영향)

  • Choi, Joo Sun
    • Journal of Nutrition and Health
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    • v.23 no.6
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    • pp.408-417
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    • 1990
  • To compare the hypolipidemic effect of n6 linoleic acid n3 $\alpha$-linolenic acid and n3 eicosapentaenoic acid plus docosahexaenoic acid, male Sprague Dawley rats weighing about 450g were fed the experimental diets for 6 weeks which composed of fat at 15%(W/W) level and were different only in dietary PUFA. Dietary fat was corn oil, perilla oil, and fish oil concentrate as a source of n6 linoleic acid, n3 $\alpha$-linolenic acid, and n3 eicosapentaenoic acid+docosahexaenoic acid, respectively. Plasma total Chol and HDL-chol levels were significantly-lower in fish oil group than in corn oil and erilla oil groups. Plasma cholesterol lowering effect of PUFa was in the order of n3 EPA+DHA>n3 $\alpha$-linolenic acid>n6 linoleic acid. Plasma TG was significantly lower in both fish oil and perilla oil groups than in corn oil group. Plasma TG-lowering effect was greater by n3 PUFA (EPA+DHA, $\alpha$-linolenic acid) than by n6 PUFA(linoleic acid). However, there were no significant effects on lipoprotein pattern hemolysis, and the levels of tocopherol and malondialdehyde in plasma and RBC by difference dietary fat with sufficient tocopherol supplement. Liver superoxide dismutase activity was significantly increased in proportion to the degree of fat unsaturation, thereby resulted in the lower level of MDA in fish oil group. In conclusion, fish oil and perilla oil rich in n3 PUFA may have important nutritional applications in the prevention and treatment of atherosclerotic disease.

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Could Glucose Oxidase and Superoxide Dismutase Inhibit the Oxidation of Fats and Oils ? (글루코오스 산화효소와 수퍼옥사이드 디스뮤타제는 유지의 산화를 억제할 수 있는가?)

  • Han, Dae-Seok;Yi, Ock-Sook;Ahn, Byung-Hak;Shin, Hyun-Kyung
    • Korean Journal of Food Science and Technology
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    • v.23 no.4
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    • pp.517-519
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    • 1991
  • The effect of glucose oxidase (GO) and superoxide dismutase (SOD) on the oxidative stability of fish oil was investigated from oxygen content and peroxide value determinations of oil samples stored in vial. GO could inhibit the oxidation of the oil by removing headspace oxygen. When SOD was solubilized in the oil, peroxide value was slightly lower than that of a control, indicating that the enzyme also had an effect on retarding the oxidation.

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Lipid Peroxidation and Vitamins E and A Levels in Tissues of Rats Fed Fish Oil or Soybean Oil Supplemented with Vitamin E (비타민 E 수준을 달리한 어유 또는 대두유를 먹인 흰쥐 조직의 지질과산화와 비타임 E 및 A 상태)

  • Choi Yong-Sun
    • Journal of Nutrition and Health
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    • v.28 no.10
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    • pp.967-975
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    • 1995
  • To investigate effects of dietary fish oil and vitamin E level on the tissue levels of vitamin E and vitamin A and to see which tissue is sensitive to lipid peroxidizability, male Sprague-Dawley rats were fed experimental diets composed of either menhaden oil or soybean oil nad either low(equivalent to 17 mg $\alpha$-tocopherol) or high (equivalent to 140mg $\alpha$-tocopherol) vitamin E level for 4 weeks. Palsma TBARS per mg lipid was significantly elevated in rats fed fish oil with low vitamin E level compared to soybean oil-fed rats. TBARS levels of liver, heart, kidney and liver microsomes were also increased by feeding fish oil with low vitamin E level. Plasma TBARS level was significantly correlated with TBARS levels of liver, heart, kidney and liver microsome. Plasma vitamin E level of groups with vitamin E supplementation was elevated significantly as compared to the those without vitamin E supplementation, whereas vitamin E levels of liver, heart and kidney were not changed significantly. Plasma TBARS was negatively correlated with plasma vitamin E(r=0.5763, P<0.001) and A(r=-0.4523, P<0.01) and seems to be a good indicator of in vivo lipid peroxidative stress.

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산화안정성이 높은 어유 캡슐 제품 개발

  • Eo, Myeong-Hui;Gang, Hyeon-Ju;Kim, Ok-Seon;Ju, Dong-Sik;Jo, Sun-Yeong
    • 한국생물공학회:학술대회논문집
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    • 2000.11a
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    • pp.769-772
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    • 2000
  • Fish oil has abundant highlly unsaturated fatty acids such as EPA and DHA. Therefore, fish oil is very susceptible to peroxidation. Adding any antioxidants to fish oil is acceptable to prevent the peroxidation. However, nontoxic and strong naturally occurring antioxidants for fish oil was not developed. ${\alpha}-tocopherol$ is one of useful natural antioxidants, but it is not good to prevent the fish oil peroxidation. In this study, we examined the development of microencapsulated squid liver oil product to prevent effectively peroxidation of the fish oil. The acceptable materials for encapsuling the squid liver oil were gum arabic and gelatin. The ultimate encapsulation rate of squid liver oil was 45.5%.

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An Experimental Study on the Uniform Droplet Production Regions of Light Oil Blended with Fish Oil (어유혼합경유의 균일액상 생성영역에 관한 실험적 연구)

  • Jang, Jae-Eun;Ahn, Soo-Kil
    • Journal of the Korean Society of Fisheries and Ocean Technology
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    • v.28 no.2
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    • pp.164-170
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    • 1992
  • In order to understand and explain the spary combustion, it was necessary to understand the disintegration mechanisms of liquid jet. To understand the disintegration mechanisms of liquid jet, the disintegration phenomena and uniform droplet production regions of testing liquid jet was investigated by means of longitudinally vibration capillary nozzle, which was injected the testing liquids. The testing liquids were light oil and light oil and light oil blended with 25wt% fish oil (File fish oil, Sardine fish oil, Alaska pollac oil) The results can be summarized as follows: 1. The uniform droplet phenomena have been changed according to the frequency of capillary tube, the jet velocity and physical properties of testing oils. 2. Within the region of uniform droplet, Reynold number was increased as Weber number increases. 3. The lower limit of wave length in which uniform droplet was produced 0.8d which was lower than Rayleigh wave length 4. The light oil blended with file fish oil which has lower viscosity and surface tension had the widest uniform droplet production region on the frequency and velocity among testing oils. But light oil blended with sardine fish oil were similar with light oil in the uniform production region.

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Morphological Changes of the Aorta Induced by Fish Oil Feeding in Bilateral Oophorectomized Rats (어유섭취가 난소를 절제한 흰쥐 대동맥에 미치는 영향에 관한 형태학적 연구)

  • 전영희
    • Journal of Nutrition and Health
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    • v.29 no.2
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    • pp.166-176
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    • 1996
  • Effect of fish oil feeding was investigated on morphological changes of thoracic aora in female rats after bilateral oophorectomy(OVX). Fifty four healthy female rats of Spraque-Dawley strain, were divided into sham group, OVX group and , OVX and fish oil feeding, group. Experimental animals were sacrificed at the end first, eighth week and sixteenth week after operation, thoracic aorta blood sample were collected. The results obtained were as follows ; 1) Total cholesterol and LDL-cholesterol contents in serum were significantly higher in the sham and OVX groups than fish oil feeding group. Serum HDL-cholesterol levels among three exjperimentnal group were lowest in the OVX group. 2) In the sham operation group, as experimental period prologed the endothelial cells were distorted round shape and enlarged, and the subendothelial layer was widened in tunical intima. The elastic lamina were disrupted in tunica group. In the fish oil feeding group, the endothelial cells and subendothelial layer in tunica intima, and the elastic lamina in tunica media were intance. From the present results, it was suggested that fish oil feeding may prevent the atherosclerotic changes in thoracic aorta and serum cholesterol induced by oophhorectomy in the rats.

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