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Ju‐Hwan LEE Ichiro YAMAMOTO Jin‐Suk JEONG Toshihiro NADE Toshiro ARAI Nobuhiro KIMURA 《Animal Science Journal》2011,82(5):689-697
The amount of monounsaturated fatty acid (MUFA) is intimately related to adipose softness, melting point (MP) and flavor in beef. Stearoyl‐CoA desaturase (SCD) is a main gene involved in MUFA synthesis. Mature adipose tends to be highly saturated, whereas immature or maturing adipose is highly unsaturated when chronologically based, so the degree of non‐saturation can be an index of adipose maturity. In this study, three different adipose tissues (coelomic (CL), perirenal (PR), and subcutaneous (SC)) from three beef breeds with differing slaughter ages (Japanese Black (29.5 months), Holstein (20.1 month), and F1 crossbreed (25.6 months)) were examined to: (i) determine adipose maturity level as indexed by MUFA %; and (ii) determine SCD and other lipogenic gene messenger RNA (mRNA) expression levels in relation to unsaturated fatty acid content. Fatty acid composition was significantly different between adipose tissues (P < 0.05). MUFA amount was high in the following order: SC > CL > PR. This pattern corresponded to SCD mRNA expression profile showing higher expression in SC than CL and PR. However, Japanese black cattle are an exception with CL adipose containing similar UFA % as SC adipose, yet having the lowest SCD mRNA expression level among all adipose tissues tested. Therefore, SCD mRNA expression and MUFA % appear to be directly related; however, differences in SCD mRNA expression among three adipose tissues may reflect differences in the fat development characteristics affected by chronological age of the cattle breeds. 相似文献
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Influence of feeding regime on fatty acid composition in young red-spotted grouper Epinephelus akaara 总被引:1,自引:0,他引:1
ABSTRACT: Young red-spotted grouper Epinephelus akaara with an average total length of 3.4 cm were divided into five groups in floating net-cages, and reared under satiated conditions with different feeding frequencies (0.5, 1, 2, 4 and 8 times per day) for 40 days. Total food intake increased with feeding frequency. Feeding four times per day resulted in the highest growth and food conversion efficiency. Total lipid accumulation in the muscle, liver and intraperitoneal fat body (IPF) increased with feeding frequency. Red-spotted grouper were found to contain a high proportion of docosahexaenoic acid (DHA) in the muscle. Fish fed 0.5 times per day were characterized as having a high proportion of DHA in triglycerides (TG) in muscle (80%), liver (69%) and IPF (18%). Increasing saturated fatty acids and a relative reduction of DHA were observed in the muscle TG as the feeding frequency increased. Frequent feeding accelerated the accumulation of eicosapentaenoic acid and saturated acids in the liver and IPF. Low saturated acids and a subsidiary proportional increase in DHA were the result of the low lipid reserves. A possible role for DHA and saturated acids are discussed with regard to lipid reserves. 相似文献
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丁钟哲 《黑龙江八一农垦大学学报》2005,17(6):76-80
为了使养殖场因有害性赤潮而受到的损失最小,最好的方法是在赤潮扩散之前探测出赤潮的发生。利用人造卫星资料和GIS技术,采用海色算法和空间分析技术进行赤潮的探测。本文按日为计量单位,利用HABAS程序表示出从1995年至2004年发生在韩国沿岸的有害性赤潮的空间分布、密度和生物种。空间分析结论是通过比较卫星资料和现场观测得出的。通过分类有害性赤潮地区分布,来完成对有害性赤潮初期发生地区的分析。 相似文献
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Woon Yong OH Ji Woong LEE Chong Eon LEE Moon Seok KO Jae Hong JEONG 《Animal Science Journal》2009,80(6):716-723
In this study, a structured survey questionnaire was used to determine consumers' preferences and behavior with regard to horse meat at a horse meat restaurant located in Jeju, Korea, from October 1 to December 24, 2005. The questionnaire employed in this study consisted of 20 questions designed to characterize six general attributes: horse meat sensory property, physical appearance, health condition, origin, price, and other attributes. Of the 1370 questionnaires distributed, 1126 completed questionnaires were retained based on the completeness of the answers, representing an 82.2% response rate. Two issues were investigated that might facilitate the search for ways to improve horse meat production and marketing programs in Korea. The first step was to determine certain important factors, called principal components, which enabled the researchers to understand the needs of horse meat consumers via principal component analysis. The second step was to define consumer segments with regard to their preferences for horse meat, which was accomplished via cluster analysis. The results of the current study showed that health condition, price, origin, and leanness were the most critical physical attributes affecting the preferences of horse meat consumers. Four segments of consumers, with different demands for horse meat attributes, were identified: origin‐sensitive consumers, price‐sensitive consumers, quality and safety‐sensitive consumers, and non‐specific consumers. Significant differences existed among segments of consumers in terms of age, nature of work, frequency of consumption, and general level of acceptability of horse meat. 相似文献
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Jeong Young-Jae Park Hyun-Jin Jeon Byeong-Jun Seo Bo-Seong Baek Nuri Yang Hye In Kwak Jin-Hyeob Lee Sang-Mo Choi Woo-Jung 《Journal of Soils and Sediments》2022,22(2):429-442
Journal of Soils and Sediments - This study was conducted to investigate variations in the stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) of agricultural soils under different... 相似文献
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Jun-Ho Jeong Youn-Suk Choi Young-Jae Shin Jae-Jong Lee Kyoung-Taik Park Eung-Sug Lee Sang-Rok Lee 《Fibers and Polymers》2002,3(3):113-119
Nanoimprint lithography (NIL) is a nanofabrication method known to be a low cost method of fabricating nanoscale patterns
as small as 6 nm. This study is focused on understanding physical phenomena in the embossing of nano/micro scale structures
with 100 nm minimum feature size. We present the effects of capillary force and width of stamp groove on flow behavior at
the embossing stage through numerical experimentation. We also compare our numerical results with previous experimental results
and discuss our results. 相似文献
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MIN‐SU LEE AH‐RA LEE MI‐AE JUNG IN‐HYE LEE JI‐HYE CHOI HYUN‐WOO CHUNG SOON‐WUK JEONG SANG‐SOEP NAHM KI‐DONG EOM 《Veterinary radiology & ultrasound》2010,51(6):670-673
We evaluated the whole body distribution of 2‐deoxy‐2‐[18F]fluoro‐d ‐glucose (18F‐FDG) in seven beagle dogs using positron emission tomography/computed tomography. The mean and maximum standard uptake values (SUV) for various tissues were computed. The SUV of the aortic blood pool was 0.65±0.19. Moderate uptake was present in brain (3.40±1.01). Mild uptake was present in orbital muscles, soft palate, laryngeal and pharyngeal region, mandibular salivary gland, myocardium, liver, pancreas, kidney, and intestine. 18F‐FDG uptake would be normally higher in these tissues because of normal physiologic activity. Mean and maximum SUV values of the eye, skeletal muscle, bone tissue, spleen, adrenal gland, stomach, tongue, gall bladder, and lung were similar to or lower than that of the aortic blood pool. These data provide a normal baseline for comparing pathologic 18F‐FDG uptake. 相似文献