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  • Title/Summary/Keyword: myristic acid

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Dietary Fatty Acids and Blood Cholesterol

  • Hayes, K.C.;Khosla, Pramod;Pronczuk, Andrzej;Lindsey, Saralyn
    • Journal of Nutrition and Health
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    • v.24 no.4
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    • pp.378-392
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    • 1991
  • A series of studies in monkeys and hamsters, and reevaluation of published human data, indicate that dietary saturated fatty acids exert a dissimilar metabolic impact on cholesterol metabolism. Myristic acid(14 : 0) appears to have a major cholesterol-raising effect by means of decreasing LDL receptor activity and by increasing the direct production of LDL (from sources other than VLDL-catabolism) Palmitic acid (16 : 0) appears neutral in most cases (plasma cholesterol<200mg/dl) or until the LDL receptor is down-regulated, as with high cholesterol intake or obesity. In such cases. the down-regulated LDL receptors coupled with an increased VLDL production (induced by 16 : 0 and 18 : 1) can divert VLDL remnants to LDL and expand the LDL pool. Furthermore. the cholesterolemic impact of any saturated fatty acid can be countered up to a saturable 'threshold' level by dietary linoleic acid (18 : 2) which up-regulates the LDL receptor. Once above this 'threshold' the major fatty acids (16 : 0, 18 : 0, 18 : 1, 18 : 2, 18 : 3) appear to exert an equal impact on the circulating cholesterol concentration.

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A Study on the Physical Properties of Saturated Fatty Acids for External Stimulus (외부자극에 대한 포화지방산의 물성평가)

  • 조완제;구창권;송경호;박태곤;박근호
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • 1998.11a
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    • pp.179-182
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    • 1998
  • The structural changes of molecules on the water surface were measured by displacement currents and π-A isotherm. By using a theoretical equations we calculated charges(ΔQ) and dipole moment( mz) of saturated fatty acids( C12, C14, C16). The dynamic behavior of saturated fatty acid monolayers at the air/water interface was investigated using a displacement current-measuring technique coupled with the so called Langmuir film technique and also the dipole moment of the acids was determined.as determined.d.

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Fatty Acid Composition of Vibrio vulnificus, Escherichia coli and Salmonella typhimurium Lipopolysaccharide(LPS) (Vibrio vulnificus, Escherichia coli 및 Salmonella typhimurium Lipopolysaccharide(LPS)의 지방산 조성)

  • Lee, Bong-Hun;Park, Jang-Su;Kang, Shin-Won
    • Journal of the Korean Applied Science and Technology
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    • v.11 no.2
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    • pp.65-68
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    • 1994
  • Vibrio vulnificus에서 lipopolysaccharide(LPS)를 추출하여 지방산 조성을 분석한 후 이 결과를 Escherichia coli LPS와 Salmonella typhimurium LPS의 것들과 비교하였다. Vibrio vulnificus LPS의 주 지방산은 myristic acid(C14:0, 41.37%)이었고 Escherichia coli LPS는 lauric acid(C12:0, 37.03%), Salmonella typhimurium LPS는 capric acid(C10:0, 48.60%)로 서로 달랐으나 이 세가지 지방산이 각 LPS의 주성분이었다(70%이상).

Characterization of Ion Fragmentations of Fatty Acids

  • 최성신
    • Bulletin of the Korean Chemical Society
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    • v.18 no.6
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    • pp.573-578
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    • 1997
  • Ion fragmentations of fatty acids such as stearic acid, palmitic acid, myristic acid, and lauric acid were studied using mass spectrometry and semiempirical calculations. The mass spectra of fatty acids showed the distributions of CH₃(CH₂)+n and [(CH2)nCO2H]+ fragment ions. The relative ion abundance distributions of [(CH2)nCO2H]+ showed the local maxima at n=6, 10, and 14. The local maximum phenomena were also found in the mass spectra of methyl stearate but not in those of normal alcohols. These local maxima could be explained not by heats of reaction for fragmentation but by the cyclic structures of the molecular ions. The AM1 semiempirical calculations for fatty acids clearly show that the linear structures are more favorable than the cyclic ones for neutral molecules while the cyclic structures are more favorable than the linear ones for ionic molecules. The distances between carboxyl group and methylene of the cylic structures of ionized fatty acids were calculated. The methylene carbons with n=6, 10, and 14 were closer to the carboxyl group than adjacent ones.

Comparison of Quality Characteristics of Korean Native Black Pork and Modern Genotype Pork during Refrigerated Storage after Thawing (해동시킨 재래흑돼지육과 개량종 돼지육의 냉장저장중 품질비교)

  • Kang, Sun-Moon;Kang, Chang-Gie;Lee, Sung-Ki
    • Food Science of Animal Resources
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    • v.27 no.1
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    • pp.1-7
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    • 2007
  • This study was carried out to compare the quality characteristics of korean native black pork (KNP) and modern genotype pork (MGP) during refrigerated storage after thawing. M. longissimus from 5 Korean native black barrows of 65.3 kg and 5 modern genotype barrows (Landrace×Yorkshire×Duroc) of 114.3 kg were frozen at 80C for 1 month and stored at 2±0.3C for 7 days. The carcass weight and dressing percentage was significantly lower in pork from Korean native black pigs than modern genotype pigs (p<0.05). The crude fat and sensory quality were significantly higher in KNP than in MGP (p<0.05), and moisture, myristic acid, gamma-linolenic acid, linolenic acid, and cis-5,8,11,14,17-eicosapentaenoic acid levels were significantly lower in KNP (p<0.05). The pH value was significantly higher in KNP than in MGP after 5 days of storage (p<0.05). Drip loss was significantly lower in KNP than in MGP during storage (p<0.05). The TBARS value was significantly higher in KNP than in MGP after 5 days of storage (p<0.05). Overall, KNP had lower moisture and unsaturated fatty acid levels relative to MGP and showed less oxidative stability during storage, however it had higher crude fat content, water-holding capacity, sensory quality and color stability than MGP.

Effects of glycozyme addition on fatty acid and meat quality characteristics of growing pigs

  • Olivier Munezero;In Ho Kim
    • Korean Journal of Agricultural Science
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    • v.50 no.2
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    • pp.337-346
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    • 2023
  • Synbiotics help to improve gut health by promoting the growth of beneficial bacteria while glyconutrients provide a source of energy for the gut bacteria and may also have immunemodulating effects. The aim of the present study was to assess the effect of this combination on fatty acid and meat quality characteristics of growing pigs. In a five-week experiment, 804 growing three-way crossbred ([Landrace × Yorkshire] × Duroc) pigs with an initial body weight of 31.90 ± 2.6 kg on average were assigned to two treatments: 1) CON (basal diet) and 2) TRT1 (basal diet + 0.3% glycozyme [synbiotics and glyconutrient]), each consisting of 402 pigs. The TRT1 groups showed significantly higher values of palmitoleic acid (C16:1), capric acid (C10:0), myristic acid (C14:0), lauric acid (C12:0), elaidic acid (C18:1, t), pentadecylic acid (C15:0), gondoic acid (C20:1), lignoceric acid (C24:0), and omega-6 : omega-3 in fat than the CON groups. Moreover, in the lean tissues of the pig, the levels of C12:0, C14:0, C17:0, and C20:1 were significantly higher in TRT1 than in CON. However, significant differences were not observed after glycozyme addition in pH, water holding capacity, cooking loss, longissimus muscle area, drip loss, meat color, and sensory evaluation parameters. To conclude, the positive results of the fatty acid composition indicate that glycozyme may be an effective pig feed additive.

Chemometric Approach to Fatty Acid Profiles in Soybean Cultivars by Principal Component Analysis (PCA)

  • Shin, Eui-Cheol;Hwang, Chung-Eun;Lee, Byong-Won;Kim, Hyun-Tae;Ko, Jong-Min;Baek, In-Youl;Lee, Yang-Bong;Choi, Jin-Sang;Cho, Eun-Ju;Seo, Weon-Taek;Cho, Kye-Man
    • Preventive Nutrition and Food Science
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    • v.17 no.3
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    • pp.184-191
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    • 2012
  • The purpose of this study was to investigate the fatty acid profiles in 18 soybean cultivars grown in Korea. A total of eleven fatty acids were identified in the sample set, which was comprised of myristic (C14:0), palmitic (C16:0), palmitoleic (C16:1, ω7), stearic (C18:0), oleic (C18:1, ω9), linoleic (C18:2, ω6), linolenic (C18:3, ω3), arachidic (C20:0), gondoic (C20:1, ω9), behenic (C22:0), and lignoceric (C24:0) acids by gas-liquid chromatography with flame ionization detector (GC-FID). Based on their color, yellow-, black-, brown-, and green-colored cultivars were denoted. Correlation coefficients (r) between the nine major fatty acids identified (two trace fatty acids, myristic and palmitoleic, were not included in the study) were generated and revealed an inverse association between oleic and linoleic acids (r=-0.94, p<0.05), while stearic acid was positively correlated to arachidic acid (r=0.72, p<0.05). Principal component analysis (PCA) of the fatty acid data yielded four significant principal components (PCs; i.e., eigenvalues>1), which together account for 81.49% of the total variance in the data set; with PC1 contributing 28.16% of the total. Eigen analysis of the correlation matrix loadings of the four significant PCs revealed that PC1 was mainly contributed to by oleic, linoleic, and gondoic acids, PC2 by stearic, linolenic and arachidic acids, PC3 by behenic and lignoceric acids, and PC4 by palmitic acid. The score plots generated between PC1-PC2 and PC3-PC4 segregated soybean cultivars based on fatty acid composition.

Chemical Composition and Quality of Persimmon Peels According to Cultivars (품종별 감피의 화학적 성분 특성)

  • Kim, Suk-Kyung;Lim, Jung-Hyung;Kim, Young-Chan;Kim, Mi-Yeon;Lee, Byung-Woo;Chung, Shin-Kyo
    • Applied Biological Chemistry
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    • v.48 no.1
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    • pp.70-76
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    • 2005
  • Approximate composition and physicochemical properties of 7 cultivars of persimmon peel, by product of dried-persimmon, were examined. The content of crude fiber were different according to cultivars. Glucose, fructose and sucrose were isolated by HPLC; also, myristic, palmitic, palmitoleic, oleic and linolenic acid were the major fatty acids in persimmon peel. Total and free amino acid were 241.32-371.45 mg/100 g and 3.69-28.31 mg/100 g, respectively; also, aspartic and glutamic acid were the predominant amino acids, reaching a level between 19.6 and 24.8% of total amino acids. Insoluble dietary fiber content(34.89-50.76 g/100 g) was remarkably higher than soluble dietary fiber (2.44-7.09 g/100 g). Total carotenoids were in the range of 179.4-340.6 mg/100 g, and total phenolic compounds ranged from 44.07-196.98 mg/100 g, showing differences between cultivars.

Physico-Chemical, Fatty Acid Composition and Sensory Properties of Venison from Cervus elaphus andadensis (Elk Deer) (엘크 사슴육의 물리화학적, 지방산 조성 및 관능적 품질 특성)

  • Kim Il-Suk;Jin Sang-Keun;Hah Kyung-Hee;Park Seok-Tae;Kwuak Kyung-Rak;Park Jung-Kwon;Kang Yang-Su
    • Food Science of Animal Resources
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    • v.26 no.1
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    • pp.70-77
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    • 2006
  • This study was carried out to evaluate the quality characteristics on the two different muscles (Loin; T1, Ham; T2) from the Cervus elaphus andadensis (Elk deer). The water content and shear force of T1 were lower than that of T2. The protein content and water holding capacity were lower in T2 compared to the T1. In meat color, L,aandb values were not different between T1 and T2. In the texture properties, there were significantly (p<0.05) differences in hardness, adhesiveness, gumminess and brittleness, but cohesiveness and springiness were not different significantly (p<0.05). In fatty acid analysis, myristic acid and linoleic acid of T2 were high (p<0.05) as 5.06 and 10.37% respectively, while palmitoleic acid of T1 were significantly (p<0.05) higher than that of T2. SFA and UFA were not different between the T1 and T2, although EFA of T1 was significantly (p<0.05) higher than that of T2. In sensory evaluation, acceptability of T2 in fresh meat showed the slightly high, but that of T2 in cooked meat was slightly low score. All samples were not significantly different in overall acceptability.

Effect of Dietary Fat and Marginal Tocopherol Supplement on Plasma Lipid, Tocopherol Contet and Fatty acid Composition of Rat Tissues (식이지방과 Tocopherol 첨가가 혈액의 지질 및 조직의 Tocopherol 함량과 지방산조성에 미치는 영향)

  • 남정혜
    • Journal of Nutrition and Health
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    • v.19 no.5
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    • pp.304-314
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    • 1986
  • To observe the effect of the different level of PUFA and marginal tocopherol supplement on HDL-chol, tissue tocopherol content and fatty acid composition, the rats were supplied either safflower oil or conconut oil with or without tocopherol supplement to the experimental diet. Plasma tocopherol level was not greatly influenced by the different dietary fat and similar effect was observed in the liver but not in the adipose tissue. HDL-chol level was reduced in the high PUFA diet regardless of tocopherol content. No effect by tocopherol supplement was observed in the fatty acid composition of liver and adipose tissue lipid in both dietary PUFA levels . There was also no increase in the content of tissue polyenoid acid by tocopherol in the high PUFA diet . Fatty acid composition of tissue lipid was rather more influenced by dietary fat. Lauric and myristic acid contents were higher in the low PUFA diet and linoleic acd and total polynoic acid content were higher in the high PUFA diet. With tocopherol supplement tocopherol /PUFA ratio of tissue was increased but the ratio of high PUFA diet was significantly lower than that of low PUFA diet. Marginal tocopherol supplement could not reduce the peroxidizability index of high PUFA diet.

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