• Entomological Research
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• 제48권5호
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• pp.453-456
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• 2018

The lipids of Clanis bilineata larvae meat (CBLM) are susceptible to oxidation, and thus the commercial and consumption values of CBLM decrease during frozen storage. In the present study, peroxide values (PV), thiobarbituric acid-reactive substances (TBARS), free fatty acid (FFA) content, fatty acid composition, and likeness (palatability) score of CBLM were determined to investigate the effect of glutathione on the oxidation of CBLM lipids. Glutathione decreased the PV, TBARS, and FFA content, maintained fatty acid composition, and increased the likeness (palatability) score of the CBLM, indicating that glutathione can be used as a cryoprotectant to extend the shelf life of CBLM.

• 한국식품영양학회지
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• 제5권1호
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• pp.1-6
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• 1992

For the effective utilization of apricot seed resources of food protein and lipid, the general composition, amino acid composition and chemical characteristics were analysed. The skinned and non-skinned apricot seed contained 53.9% and 48.0% of crude lipid, 24.7% and 26.8% of crude protein, respectively. There were no significant difference in the amino acid composition among skinned and non-skinned apricot seed, The major amino acids were glutamic acid, aspartic acid, alanine, tyrosine and threonine, holding 14.6 to 16.9%, 12.4 to 13.7%, 9.2 to 12.1%, 7.2 to 7.5% and 7.0 to 7.2% of total amino acid content, respectively. The sum of these ammo acids occupied about 50% to total amino acids. While the quantities of methionine, histidine, and Lysine were poor content. The essential amino acids occupied about 30% to total amino acids. The acid, iodine and saponification value of apricot seed oil were 0.7 to 7.1, 80.8 to 107.5 and 182.7 to 208.4, respectively. These values were significant difference in skinned and non-skinned apricot seed.

• 동아시아식생활학회지
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• 제3권1호
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• pp.61-66
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• 1993

The contents of crude fat were remarkably different according to parts in porcine tissues. The most contents of total lipids in variety tissues were neutral lipid, and the nexts were phospholipid and glycolipid, where these of the most composition in liver were phospholipid and the next neutrallipid and glycolipid. The major component of the nonpolar lipids in fresh was triglyceried(58.09∼74.68%) and phospolipid in the polar lipid were phosphatidyl choline(20.14∼45.17%) and phosphatidyl ethanolamine(18.5∼30.14%) and the main component in glycolipid acylsterol glyceride(26.10∼45.15%), respectively.

• Fisheries and Aquatic Sciences
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• 제5권3호
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• pp.165-171
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• 2002

This study was conducted to investigate the effects of dietary lipid sources on survival, growth anc body composition of snail (Semisu1cospira gottschei). Three replicate groups of snail (average weighing 152mg) were fed the diets containing different lipid sources such as lauric acid (LA), squid liver oil (SO), linseed oil (LO), corn oil (CO), SO+ LO, SO+CO, LO+CO and SO+LO+CO for 8 weeks. Survival was not affected by dietary lipid sources (p>0.05). Weight gain of snail fed the SO, SO+LO and SO+LO+CO diets was significantly higher than that of snail fed the LA and LO diets (P<0.05), and the lowest weight gain was observed in snail fed the LA diet (P<0.05). No significant difference was found in crude lipid content of edible portion in snail fed the different diets (P>0.005). Contents of 12:0, 18:2n­6, 18:3n-3 and 20:5n-3 from snail fed the LA, CO, LO and SO diets were higher than those from snail fed the other diets, respectively (p<0.05). The highest 22:6n-3 content was observed in snail fed the SO+ LO but was not significantly different from that of snail fed the SO, SO+CO and SO+LO+CO diets (p>0.05). The n-6 highly unsaturated fatty acids such as 20:4n-6 and 22:4n-6 contents of snail were not affected by dietary lipid sources (p>0.05). These results suggested that squid liver oil and mixture of squid liver oil and linseed and/or corn oil are good dietary lipid sources for the normal growth of snail. However lauric acid may not be a good lipid source for snail diet.

• 한국잠사곤충학회지
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• 제33권2호
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• pp.100-102
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• 1991

제사공정의 부잠사 처리폐수에 대하여 그 성상과 추출 유지성분을 분석한 결과 1. 부잠폐수의 COD 605mgO/$\ell$ 총 용존 고형물량 2,335mg/$\ell$ 총 부유 고형물량 2,234mg/$\ell$이었다. 2. 부잠폐수의 지질에는 triglyceride가 76.8%로 가장 많이 함유되었으며 유리 지방산 12.5%와 diglyceride 5.7% free sterol 5.0% 순이었다. 3. 부잠폐수지질의 지방산 조성은 oleic acid, linolenic acid와 linoleic acid의 함유율이 64.93%로 가장 많이 함유되어 있고 palmitic acid 29.39% stearic acid 4.93%의 순이었다.

• 생명과학회지
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• 제5권2호
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• pp.70-75
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• 1995

The effect of lipoxygenase (LOX) on the oxidation and co-oxidation of lipid fraction was studied in the model system of rainbow trout. For the reaction in model system 1 g of lipid fraction and 50mL of enzyme extract(LOX, 140 unit in 50mL phosphate buffer solution at pH 7, 4)), which were obtained from rainbow trout, were homoginized in the presence of Tween 20 and kept at 23$\circ$C for 3 days. The activity of LOX was decreased to 43% of initial level during the reaction in the model system. The initial composition of rainbow trout lipid was showed to be consisted of trigliceride(TG;82%) and free fatty acid(FFA;0.1%), while this converted to 59% of TG and 20% of FIFA, respectively after reaction in model system. Change of fatty acid composition was also observed and the content of linoleic acid, one of the major fatte acids, was decreased to 13% from 54% in the content of total fatty acids after reaction. The carotenoids in rainbow trout were composed of 0.4% $\alpha$-carotene, 1.6% $\beta$ -carotene, 80% canthaxanthin, 7% lutein and 11% zeaxanthin, thus the canthaxanthin was the major component. This canthaxanthin was the most degraded carotenoid by lipoxygenase catalyzed co-oxidation during the reaction. On the other hand the tocopherol isomers found in the rainbow trout were $\alpha$ and $\beta$ -tocopherol, and $\alpha$-tocopherol had a higher degradation rate by the lipoxygenase catalyzed co-oxidation than of $\beta$-tocopherol in the reaction of model system.

• 한국축산식품학회지
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• 제35권1호
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• pp.10-18
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• 2015

The changes in fatty acid composition of total intramuscular lipid and phospholipids were investigated in the longissimus dorsi, left-hind leg muscle, and abdominal muscle of male Ira rabbits. Changes were monitored at 35, 45, 60, 75, and 90 d. Analysis using gas chromatography identified 21 types of fatty acids. Results showed that the intramuscular lipid increased and the intramuscular phospholipids (total intramuscular lipid %) decreased in all muscles with increasing age (p<0.05). An abundant amount of unsaturated fatty acids, especially polyunsaturated fatty acids, was distributed in male Ira rabbits at different ages and muscles. Palmitic acid (C16:0), stearic acid (C18:0), oleic acid (C18:1), linoleic acid (C18:2), and arachidonic acid (C20:4) were the major fatty acids, which account to the dynamic changes of the n-6/n-3 value in Ira rabbit meat.

• 한국연초학회지
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• 제19권1호
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• pp.57-63
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• 1997

The composition of leaf surface lipid in Flue-cured tobacco and their changes during curing was investigated. The flue-cured variety, Nicotiana tabacum cv. NC 82 was cultivated at Eumsung experiment station in 1996. The samples of riced leaves with different stalk Position(Lugs, Cutter, Leaf and Tips) and different curing stage at half yellowing(24hr), yellowing(48 hr) , color axing(72 hr), midrib drying(96 hr) and cured(120 hr) were collected for analysis of leaf surface lipid. $\alpha$ - and $\beta$ - 4, 8, 13-Duvatriene-1, 3-diol($\alpha$, $\beta$-DVT) were major components in leaf surface lipid extracted with methylene chloride and sugar ester was detected slightly DVT content was increased with ascending stalk position, but increasing trend of total hydrocarbon was not observed. While DVT was decreased throughout curing of tobacco leaves, hydrocarbon content did not show significant change during curing process. Twenty-two duvane compounds were detected by capillary GC in duvane fraction isolated from leaf surface lipid and of which 11 compounds were identified by GC-MS. These compounds were decreased with curing in all stalk position.

• 한국식품영양과학회지
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• 제25권5호
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• pp.727-734
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• 1996

관능적으로 식미특성이 차이나는 쌀품종으로서 식미가 양호한 동진, 중간정도의 진미 및 양호하지 못한 탐진의 지질조성을 비교하였다. 총 지질 및 정제지질의 함량은 진미에서 1.7배~2.2배 높아 식미 차이에 따라 일정한 경향을 나타내지 않았다. 분획지질은 진미, 탐진과 비교하여 식미가 양호한 동진에서 중성지질은 9.2~13.5%, 인지질은 3.1~4.7% 높은 함량을, 당지질은 12.3~18.2% 낮은 함량을 보였다. 지질조성은 중성지질과 인지질의 경우 식미의 차이에 따라 일정한 경향을 나타내지 않았으나, 당지질의 경우는 식미가 양호할수록 monogalactosyl diglycerides, steryl glycosides는 각각 0.4~19.24%, 14.4~17.1% 높은 함량을, esterified steryl glycosides, celebrosides, digalactosyl diglycerides의 경우는 각각 15.3~28.1%, 1.2~5.7%, 2.8~3.8% 낮은 함량을 나타내었다. 지방산 조성도 중성지질 및 인지질에서 식미의 차이에 따른 명확한 경향은 발견할 수 없었으며 당지질은 식미가 양호할 수록 palmitic acid의 함량은 0.4~22.6% 높고 linoleic acid 의 함량은 5.0~l2.0% 낮았다.

• Nutrition Research and Practice
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• 제17권4호
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• pp.682-697
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• 2023

BACKGROUND/OBJECTIVES: Tibetan tea is a kind of dark tea, due to the inherent complexity of natural products, the chemical composition and beneficial effects of Tibetan tea are not fully understood. The objective of this study was to unravel the composition of Tibetan tea using knowledge-guided multilayer network (KGMN) techniques and explore its potential antioxidant and hypolipidemic mechanisms in mice. MATERIALS/METHODS: The C57BL/6J mice were continuously gavaged with Tibetan tea extract (T group), green tea extract (G group) and ddH2O (H group) for 15 days. The activity of total antioxidant capacity (T-AOC) and superoxide dismutase (SOD) in mice was detected. Transcriptome sequencing technology was used to investigate the molecular mechanisms underlying the antioxidant and lipid-lowering effects of Tibetan tea in mice. Furthermore, the expression levels of liver antioxidant and lipid metabolism related genes in various groups were detected by the real-time quantitative polymerase chain reaction (qPCR) method. RESULTS: The results showed that a total of 42 flavonoids are provisionally annotated in Tibetan tea using KGMN strategies. Tibetan tea significantly reduced body weight gain and increased T-AOC and SOD activities in mice compared with the H group. Based on the results of transcriptome and qPCR, it was confirmed that Tibetan tea could play a key role in antioxidant and lipid lowering by regulating oxidative stress and lipid metabolism related pathways such as insulin resistance, P53 signaling pathway, insulin signaling pathway, fatty acid elongation and fatty acid metabolism. CONCLUSIONS: This study was the first to use computational tools to deeply explore the composition of Tibetan tea and revealed its potential antioxidant and hypolipidemic mechanisms, and it provides new insights into the composition and bioactivity of Tibetan tea.