• 한국수산과학회지
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• 제52권4호
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• pp.400-407
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• 2019

The optimum growth temperature of sea cucumber is $18^{\circ}C$, above $20^{\circ}C$, the appetite declines and the digestive tract is atrophied. At $25^{\circ}C$ or more, it is known that the digestive tract is degenerated as growth is stopped by minimizing metabolic activity. Because of these physiological and ecological characteristics, the growth period of sea cucumber Apostichopus japonicus is relatively short in the natural environment of Korea where four seasons are clear. Therefore, maintenance of water temperature in sea cucumber culture is very important. This experiment was conducted to investigate the growth and lipid compositions of sea cucumbers at high temperature. Results showed that the growth and survival rates of sea cucumber were not significantly different until $26^{\circ}C$ (P>0.01). The fatty acid compositions of total lipid of sea cucumber tended to increase with saturated fatty acid content and decrease with n-3 fatty acid content at higher water temperature.

• 한국산학기술학회논문지
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• 제13권2호
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• pp.701-709
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• 2012

본 연구는 미숙아를 낳은 산모를 대상으로 오케타니 유방마사지를 제공하여 산모의 유방 불편감과 모유 유축시간 그리고 모유 내 성분 중 지방과 칼로리에 어떠한 영향을 미치는지 알아보았다. 본 연구는 단일 실험군 시계열 연구로 신생아 중환자실에 자녀가 입원한 상태인 산모 17명을 대상으로 오케타니 유방 마사지를 2회 실시하였다. 유방 마사지의 효과 검증을 위해 유방 불편감은 시각적 사상척도를 이용하였고, 모유 유축 시간은 구두로 문의하였으며 모유 성분은 크리마토크릿 기계를 이용하여 측정하였다. 유방 불편감은 오케타니 유방 마사지 전 보다 마사지 후에 유의하게 감소하였으나(p<.05), 모유 유축시간은 유의한 차이를 보이지 않았다. 모유 성분 분석에서 지방, 칼로리, 그리고 크리마토크릿은 오케타니 첫 번째 유방마사지 전에 비해 두 번째 오케타니 유방마사지 후에 증가하였다(p<.05). 이상의 결과를 토대로 오케타니 유방 마사지는 미숙아를 낳아 직접 모유수유를 하지 못하는 산모들에게 유방 불편감을 줄이고, 지방과 칼로리가 높은 모유를 유축하여 미숙아에게 제공할 것으로 사료된다.

• Fisheries and Aquatic Sciences
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• 제2권2호
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• pp.113-121
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• 1999

Changes in lipid content, lipid class and fatty acid compositions of the cultured oysters in shallow-water, Bukman bay (Tongyeong, Korea), using both Korean and Japanese spats were investigated. The content of non-polar lipid (NL) comprised approximately $60- 80\%$ of total lipid (TL) in the cultured oysters. There was a positive correlation between NL content and meat weight, y=0.287lx-15.309 (r=0.834l, p<0.001). The prominent fatty acids of the oysters were 16:0, 20:5n-3 (eicosapentaenoic acid, EPA), 22:6n-3 (docosahexaenoic acid, DHA), 18:0, l8:1n-7, l8:1n-9, l6:1n-7, 14:0 and l6:4n-3. During the growth of the oysters, l6:4n-3 showed the highest coefficient of variation, accounting for $41.8\%$ for the Korean oyster and $32.3\%$ for the Japanese one, respectively. Both oysters showed low level of n-3 fatty acids such as DHA and EPA and high level of n-6 fatty acid, 20:4n-6, in the spawning period (August). During growth of the oysters, both EPA and DHA were the richest fatty acids in the harvest period (December, 314 mg/100g sample) and in the pre-spawning period (July, 237-247 mg/100g sample), respectively. Consequently, the cultured oyster with Japanese spat contained approximately two times more n-3 fatty acids per oyster individual than those with Korean one in the harvest season.

• 한국수산과학회지
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• 제49권3호
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• pp.317-322
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• 2016

This study was carried out to investigate the effects of various dietary lipid sources on the growth performance, body composition, and fatty acid profiles of juvenile fancy carp (Cyprinus carpio var. koi). Three replicate groups of fish (initial mean body weight, 15.1±0.18 g) were fed one of five experimental diets containing fish oil (SLO), soybean oil (SO), linseed oil (LO), lard (LA), or a mixture of SLO, SO, and LO (Mix) for 8 weeks. Fish fed the LA diet gained less weight than did fish fed the LO diet. The feed efficiency and protein efficiency ratio of fish fed the LA and Mix diets were lower than those of fish fed the SO and LO diets. The body lipid content of fish fed the SO diet was lower than those of the other groups. Whole-body fatty acid compositions reflected the fatty acid compositions of dietary lipid sources. Fish fed the SO diet had high concentrations of linoleic acid and arachidonic acid, whereas fish fed the LO diet were rich in linolenic acid. Fish fed the SLO diet had significantly higher levels of eicosapentaenoic acid and docosahexaenoic acid compared with fish fed the SO, LO, and LA diets. The results of this study suggest that SO or LO could be used as a replacement for SLO in the diets of juvenile fancy carp without any negative effects on growth and feed utilization when the dietary essential fatty acid requirements are satisfied for juvenile fancy carp.

• Fisheries and Aquatic Sciences
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• 제3권2호
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• pp.118-125
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• 2000

Lipid classes and fatty acid compositions of eight species of wild and cultured seawater fish in Korea were investigated. Total lipid (TL) contents of wild and cultured fish were $2.64\pm1.88\%$ and $5.42\pm1.76\%$, respectively, except for rockfish and striped beakperch. Non-polar lipids (NL) in all fish samples comprised approximately $84\%$ of the TL content. The proportion equation of NL content to TL content was y=0.9296x-0.4468 $(R^2=0.98l2, p<0.001)$. The most abundant NL class was triglyceride. The prominent fatty acids in all fish samples were 16: 0, 18: 1(n-9), 22 : 6(n-3) (docosahexaenoic acid, DHA), 16: 1(n-7), 20 : 5 (n-3) (eicosapentaenoic acid, EPA), 18 : 0 and 18 : 1(n-7). The polyunsaturated fatty acid (PUFA) group was the richest among the total fatty acids (TFA). DHA and EPA were comprised of approximately $85\%$ of n-3 PUFA. There was a positive correlation between TFA content and n-3 PUFA content; y=0.292x-0.0055 $(R^2=0.9349, p<0.001)$. The n-3 PUFA content of the cultured fish was approximately twice as much as that of the wild fish. Therefore, cultured fish were proven to provide better sources of n-3 PUFA if compared to wild fish.

• 한국식품영양과학회지
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• 제19권1호
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• pp.87-93
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• 1990

녹두전분으로 부터 유리지질과 저온 및 고온에서 결합지질을 추출한 다음 이들을 중성지질, 당지질, 인지질로 분획 정량하였으며 아울러 각 지질들의 지방산 조성을 분석하였다. 녹두전분에서 추출한 유리지질에서의 중성지질, 당지질, 인지질의 함량은 각각 98.2%, 1.7%, 0.1% 이였으며 저온 및 고온에서 추출한 결합지질에서는 각각 84.3~85.7%, 10.5~11.0%, 5.2~3,3% 이었다. 그리고 중성지질의 주된 성분은 triglyceride와 esterified sterol이었으며 이들의 함량은 총 중성지질의 90%를 차지 하였다. 당지질의 유리지질과 결합지질은 monogalactosyl diglycerides와 esteryl steryl glyceried가 주성분 이었다. 그리고 인지질의 경우 유리지질은 phosphatidyl ethanolamine (79.0%)이 그리고 결합지질은 phosphatidyl inositol등이 주성분이었고 고온추출 결합지질에서는 phosphatidyl giyeride 함량이 높았다. 또한 각 지질의 지방산 조성은 유리지질에서는 palmitic acid(50.2%), stearic acid(20.6%)이 주성분이었고 결합지질에서는 palmitic acid과 linoleic acid의 함량이 높았다. 그리고 유 질에서는 arachidonic acid와 behenic acid가 또한 고온추출 결합지질에서는 behenic acid가 미량 함유되어 있었다.되어 있었다.

• 한국고분자학회:학술대회논문집
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• 한국고분자학회 2006년도 IUPAC International Symposium on Advanced Polymers for Emerging Technologies
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• pp.261-261
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• 2006

Membranes are a central feature of all biological systems and their ability to control many cellular processes is critically important. As a result, a better understanding of how molecules bind to biological membranes is an active area of research. In this report, the interaction between our biomimetic structures and different biological membranes is reported using both model vesicle and in vitro bacterial cell experiments. These results show that lipid composition is more important for selectivity than overall net charge. An effort is made to connect model vesicle studies with in vitro data and naturally occurring lipid compositions.

• Ocean and Polar Research
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• 제33권spc3호
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• pp.349-358
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• 2011

In order to ascertain latitudinal variation of lipid contents and compositions in copepods, we collected warm water copepod species (Euchaeta sp. and Pleuromamma spp.) from four different regions from low (sub-tropical) to mid (temperate) latitudes in the Northwest Pacific Ocean. Total lipid contents of Pleuromamma spp. were about 11 $ug{\cdot}ind^{-1}$ with little latitudinal variation, whereas Euchaeta sp. showed slightly higher lipid content (20 $ug{\cdot}ind^{-1}$) than Pleuromamma spp. with latitudinal gradient (low at subtropic and high at temperate). Wax esters, known as the major storage lipid classes, were found to be the dominant lipid classes (accounting for more than 35% of total lipids) in Euchaeta sp., whereas in Pleuromamma spp., phospholipids, known as cellular membrane components, were the dominant lipid classes. However, the exception was specimens from warm pool region exhibiting dominance in storage of lipids as a form of triacylglycerols. Among fatty acids, polyunsaturated fatty acids (PUFA), especially docosahexaenoic acid (DHA : 22:6(n-3)) (about 35% of total fatty acids), were most abundant in Euchaeta sp., while saturated fatty acids (SAFA), specially hexadecanoic acid (16:0) (about 30% of total fatty acids), were most abundant in Pleuromamma spp.. Among the neutral fraction of lipids, phytol, originated from the side chain of chlorophyll, was found in all samples which generally indicate active copepods feeding on algae. While only trace amounts of short-chain fatty alcohols were found in Pleuromamma spp., significant amounts of fatty alcohols were found in Euchaeta sp.. Particularly, significant amounts of long chain monounsaturated fatty alcohols (20:1 and 22:1), generally found in cold water species, were found in Euchaeta sp. from low latitudes. The latitudinal variation of trophic lipid markers in these copepods could be significantly related with in-situ food availability and species-specific diet preference. The result of this study suggests that the lipid contents and compositions in copepods may not only indicate their nutritional condition and feeding ecology but also provide insight into species-specific living strategies under different environmental conditions (i.e. water temperature, food availability).

• 한국수산과학회지
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• 제26권2호
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• pp.102-110
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• 1993

여수지방에서 많이 생산될 뿐아니라 새로운 양식품종으로 대량생산이 가능한 새조개의 식품학적인 품질을 구명하기 위하여 새조개의 생육과 자숙육, 그리고 자숙액즙의 일반성분, 지질조성 및 지방산조성 등의 차이를 분석하여 비교, 검토하였다. 자숙육의 수분이 생육보다 다소 적었고 조단백질 및 조회분은 수분과는 반대로 생육보다 약간 증가하였으며 조지방은 약간 감소하였고 glycogen은 차이가 없었다. 휘발성염기질소량은 생육의 경우 $1.8mg\%$로 양호하였으며 자숙시 $3.7mg\%$로 약간 증가하였다. 생육과 자숙육 및 자숙액즙의 총지질조송은 각각 비극성지질이 $25.4\%,\;22.4\%$ 및 $48.7\%$, 극성지질이 $74.6\%,\;77.6\%$ 및 $51.3\%$로 대부분 극성지질로 구성되어 있었다. 비극성지질의 성분은 triglyceride 및 free fatty acid, 극성지질은 phosphatidyl choline과 phosphatidyl ethanolamine이 주성분이었다. 총지질과 비극성지질 및 극성지질을 구성하고 있는 지방산조성은 생육, 자숙육, 자숙액즙 모두가 20:5(n-3), 22:6(n-3), 16:0 및 18:0 등이 주성분을 이루고 있었고 20:5(n-3)와 22:6(n-3)을 주체로 하는 polyene산의 비율이 훨씬 높았다. 자숙육은 생육에 비해 polyene산 경우 20:5(n-3)이 증가하는 반면 22:6(n-3)은 감소하는 경향이고 포화산의 경우 16:0는 증가하나 18:0는 감소하는 경향을 보였다. 자숙액즙에는 20:5(n-3)과 22:6(n-3)을 주체로 하는 polyene산의 비율이 생육이나 자숙육에 비해 낮았으나 16:0을 주체로 하는 포화산의 비율이 높았다.

• 한국동물위생학회지
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• 제43권1호
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• pp.7-16
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• 2020

This study investigated the effects of the dietary supplementation with gaeddongssuk (Artemisia annua L.) powder on blood biochemical compositions, meat lipids and fatty acid profiles of the broiler chicks. One hundred male broiler chicks were divided randomly into five groups: group fed with basal diet (Control); group supplemented with 2.5% antibiotics in the drink water (Antibiotics), and groups supplemented gaeddongssuk powder with 5% (BG-I), 6% (BG-II), and 7% (BG-III) in the basal diets. Levels of total lipid and LDL-C in serum of broiler chicks were significantly lower in the groups supplemented with gaeddongssuk compared to the Antibiotics group. Contents of triglyceride and total cholesterol were significantly lower in the BG-III. HDL-C level was significantly higher in BG-I and BG-II compared to the Antibiotics group. Antioxidant activity of serum in the BG-II was significantly higher than Control and Antibiotics groups. Lipid peroxide contents in the BG-I and BG-II were significantly lower than to the Antibiotics group. Total lipids level of breast and legs meat was significantly lower in the groups supplemented gaeddongssuk compared to the Antibiotics group. Total cholesterol level of breast meat was significantly lower in the groups supplemented with gaeddongssuk compared to the Antibiotics group. UFA/SFA ratio of breast and legs meat from the BG-II was tend to higher compared to Control and Antibiotics groups. Taken together, these results suggest that dietary supplementation of gaeddongssuk with 6% could be applicable as the possibility to improve blood biochemical compositions and meat lipids properties in broiler chicks.