• Korean Journal of Food Science and Technology
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• v.27 no.3
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• pp.290-293
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• 1995

This study was designed to investigate the effect of potato lipoxygenase on the change of dough chemical composition including lipid distribution, fatty acid composition, carotenoids content and color value in wheat flour dough. For the study, the potato lipoxygenase was added to wheat flour at a level of $6.5{\times}10\;unit/g$ flour. The addition of potato lipoxygenase to wheat flour dough was found to cause an increase in free lipid content, an effect apparently related to the decrease in linoleic acid content and increase in peroxide value. This phenomena might be due to the enzymatic oxidation of polyunsaturated fatty acid. Also, the bleaching effect of lipoxygenase was observed as the decrease in carotenoids content of wheat flour dough. In comparison of color value, it was shown that redness, yellowness and total color difference$({\delta}E)$ were lower by addition of lipoxygenase.

• Journal of Nutrition and Health
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• v.26 no.6
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• pp.758-771
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• 1993

This study was conducted longitudinally following the total lipid and cholesterol content, fatty acids composition and Vitamin E content in human milk from 2-5 days to 12 weeks postpartum of 45 lactating Korean mothers. All samples were from well-defined subjects and uniform collection procedures were used. Total lipid concentration increased from 1.98g/dl at 2-5 days to 3.09g/dl at 12 weeks postpartum. However, there was a large variation in the concentration of total lipids. Total cholesterol concentration tended to decrease from 20.68mg/dl at 2-5days to 17.19mg/dl at 12 weeks. In comparison with transitional and mature milk, human colostrum was characterized by a lower percentage of saturated fatty acids including medium chain length fatty acids and a higher percentage of monounsatureated fatty acids and polyunsaturated fatty acids. Therefore, the P/S and M/S ratios of human milk lipids decreased significanlty during lactation. P/M/S ratio of colostrum changed from 0.38 : 0.84 : 1.00 at 2-5 days to 0.29 : 0.61 : 1.00 at 12 weeks of mature milk. Total tocopherol concentration decreased significantly from 833 ug/dl at 2-5 days to 300 ug/dl at 12 weeks.

• Journal of the Korean Society of Food Science and Nutrition
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• v.19 no.4
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• pp.291-300
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• 1990

The lipid compositions including fatty acid sterol lipid class and the lipid component of the total lipid extracted from the flesh of some fresh water fishes I. e. mandarin cornet cat fish and Korean perch were compared. The levels of total lipid of flesh tissues from the fresh water fishes were high(7.4%) in cat fish but low(1.4-2.2%) in mandarin fish Korean perch and cornet fish. On the contrary the content of unsaponifiable matters found in total lipid was low(2.6%) in cat fish but high(6.0%-6.5%) in mandarin fish Korean perch and cornet fish. Total lipids were mainly composed of triglyceride(74.6-86.5%) as major component in each sample and the other lipid components of total lipid e. g. polar lipid free fatty acids and free sterol were the minor components, The major fatty acids in total lipid of each sample were{{{{ {C }_{16 { }:_{ }0 } }}}}(19.6-29.2%) {{{{ {C }_{16 { }:_{ }1 } }}}}(17.3-30.7%) and {{{{ {C }_{18 { }:_{ }1 } }}}}(16.8-29.2%) and additionally it chiefly consisted of {{{{ {C }_{14 { }:_{ }0 } }}}} and {{{{ {C }_{18 { }:_{ }2 } }}}} Particularly the contents of polyenoic acids in total lipid of cat fish were higher than those of the other fish samples. The level of cholesterol in total lipid was low (8.3mg/g) in cat fish but were high(36.9-59.9mg/g) in mandarin fish Korean perch and cornet fish. The contents of fractionated neutral lipid(NL) were higher than those of polar lipid(PL) in each sample. Particularly phospholipid content in PL was low(6.0%) in cat fish but were high(23.1-36.3%) in mandarin fish Korean perch and cornet fish. Neutral lipids were mainly consisted of triglyceride(84.5-93.4%) as amjor component in each sample and the other lipid components of neutral lipid e, g, free fatty acids and free wterol were exhibited as a minor components, The fatty acid compositon of neutral lipids was very resembled to total lipids. The phospholipid in mandarin cornet and cat-fish were mainly composed of phosphatidyl serine(23.1-49.8%) and phosphatidyl choline(20.8-45.3%) The relatively higher amounts of phosphatidyl serine were observed in mandarine cornet and cat-fist than in Korean perch, But phosphatidyl ethanolamine(42.3%) and phosphatidyl choline (49.9%) were the main phospholipid in Korean perch. The extraordinary high content of phos-phatidyl ethanolamine compared to other fishes was characteristics in phospholipid composition of Korean perch. The major fatty acids in phospholipid of each sample were {{{{ {C }_{16 { }:_{ }0 } }}}} (38.3-46.5%) {{{{ {C}_{18 { }:_{ }0 } }}}}(14.2-21.7) and C16:1(11.6-13.8%) and additionally it chiefly consisted of C18:2, C18:0 and C17:0 The major fatty acids in glycolipid of each sample were C16:0(28.8-40.1%) C18:1(5.4-29.9%) C18:0(5.1-28.9%) and C16:1(8.2-20.1%) and additio-nally it chiefly consisted of C14:0 and C20:1.

• Journal of environmental and Sanitary engineering
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• v.2 no.3 s.3
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• pp.7-11
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• 1987

A Comparison on the fatty acid composition of 7 species of Korean edible mushroom(Agaricus bisporus, Tricholoma matsutake, Lentinus edodes, Pleurotus ostreatus, Ramaria botrytis, Sarcodon asparatus, Calocybe gambosa) were investigated by gasliquid Chromatography. The results were obtained as follows: 1) The major fatty acid in all samples were linoleic $(77.33-35.53\%)$, oleic $(39.69-1.58\%)$ and palmitic$(22.51-7.31\%)$ acid, 31 2) The content of linoleic acid was the highest in Agaricus Bisporus, Pleurotus ostreatus and Lentinus edodes meanwhile, the content of oleic acid of these mushrooms was significantly low compared with others. 3) Quantity of myristic acid was higher in comparison with fatty acid composition from common lipid source.

• Journal of the Korean Society of Food Science and Nutrition
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• v.19 no.5
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• pp.387-394
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• 1990

The effect of lysine or methionine addition on the lipid oxidation and protein properties in casein-fish oil model system during the storage of 21 days at 37$^{\circ}C$ was studied. The peroxide and TBA values were increased markedly and the amino acids addition to the system caused to reduce the extent of lipid oxidation in comparison with that of casein-fish oil system which was a control group. Significant changes in fatty acid composition of each group were observed. Polyenoic acid contents were drastically decreased during the storage in the groups with and without the amino acids additions, . And also significant losses of several amino acids were occurred with the reduction of solubility and digestibility of casein during the storage. However no different effects were observed in both additionsof lysine and methionine to the system.

• Korean Journal of Veterinary Research
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• v.36 no.4
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• pp.809-819
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• 1996

This study was conducted to identify the effects of caffeine or combinations of caffeine and iron or vitamin E on the lipid and protein components in the MDBK(Mardin-Darby Bovine Kidney) cells. For the In vitro test, MDBK cells in ${\alpha}$-MEM(Minimum Essential Medium) were divided into 4 treatment groups according to drug types and dosages as follows; the control(group A), group B was treated with 0.3mM caffeine, group C was treated with 0.3mM caffeine and 0.3mM ferric chloride, group D was treated with 0.3mM caffeine and 0.3mM vitamin E. Those groups were further divided into 5 subgroups according to the time lapsed(control, 4hrs, 8hrs, 24hrs and 48hrs lapsed group). The concentrations of the carbonyl group and malondialdehyde(MDA) and the patterns of the SDS-PAGE(Sodium Dodecyl Sulfate-Polyacrylamide Gel Electrophoresis) and fatty acid compositions were analyzed to determine the oxidative damages and metabolic changes on the lipid and protein components in the MDBK cells. The results obtained from this study were summarized as follows; 1. The concentrations of carbonyl group and malondialdehyde in MDBK cells of group C were significantly higher(p<0.01) in comparison to the control, and increased according to the time lapsed. But the results of groups B and D were little different in comparison to the group C. 2. As the analytical results of fatty acid compositions in MDBK cells, the proportions of palmitoleic acid and linoleic acid in groups B, C and D were lower in comparison to the control, while the proportion of arachidonic acid in groups B, C and D were significantly higher(p<0.01) in comparison to the control. 3. In order to determine the oxidative damages to the protein in MDBK cells, the patterns of the SDS-PAGE were examined and the patterns of SDS-PAGE in groups C and D were significantly different between 43kd and 200kd of molecular weight.

• Journal of the East Asian Society of Dietary Life
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• v.15 no.6
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• pp.675-686
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• 2005

It is known that appropriate exercise changes body composition and improves coronary artery disease. This study was undertaken to evaluate the relationships between aerobic exercise, body composition, and the blood lipid levels in the middle-aged women(33 to 54 years old). The 57 subjects were divided into two groups based on their exercise: the aerobic exercise group(A group: 44) which performed at about $60\%$ of $VO_2max$ during over 6 months and the sedentary one(S group: 13). The percentages of body fat waist/hip ratio(WHR), body mass, and lean body mass of two groups were measured and compared in serum HDLC level and oxidized LDL level, the two most effective factors of coronary artery disease. The subjects in A group showed the lower percentages of body fat and WHR, when compared with the ones in S group. The body mass and lean body mass of A group subjects were higher than those of S group subjects. The serum HDL-C level$(58.6\pm12.7mg/mL)$ was significantly higher for A than S group subjects.(p<0.05) The sem ox-LDL level $(6.64\pm4.11Eu/mL)$ for A group subjects was lower than S group ones. The fat mass showed significantly positive correlations with atherogenic index(AI)(r=0.301, p<0.05), and with blood glucose levels(r=0.334, p<0.05). Also the WHR whowed significantly positive correlations with LDL-C levels(r=0.277, p<0.05), and with AI(r=0.466, p<0.01). In summary, the subjects in A group have the lower percentages of body fat and WHR, when compared with the ones in S group. Also, A group subject showed a tendency that exercise enhances serum HDL-C levels and decreases oxidized LDL levels. And aerobic exercise showed positive results which change body composition and improve blood lipid levels. There were significantly positive correlations among the percentages of body fat At and blood glucose level. These results suggest that moderately intensive exercise is a significant factor in reducing coronary artery disease.

• Korean Journal of Food Science and Technology
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• v.21 no.2
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• pp.192-196
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• 1989

This experiment was carried out to compare the difference of lipid components, amino acid composition by size of sea eel. Large sea eel(length 57.5-60.0cm, weight 269.5-300.0g) was higher in moisture and crude protein content, and lower in crude lipid content than those of small sea eel(28.8-31.2cm, 39.5-43.6g). Total lipid(TL) of large and small sea eel were consisted of 89.7%, 93.3% neutral lipid, 8.9%, 5.2% phospholipid, and 1.4%, 1.5% glycolipid, respectively. In fatty acid composition of TL, large fishes revealed higher content in polyunsaturated fatty acids such as 20:5, 22:5, 22:6, while lower in saturates and monoenes such as 16:0, 16:1, 18:1 than those of small fishes. The major fatty acids of these fishes were generally 18:1, 16:0, 22:6, 16:1 and 20:5 in order. Total amino acid contents of large and small sea eel were 17022.7mg/100g, 15409.4mg/100g. And the main amino acids were aspartic acid, glutamic acid, isoleucine, leucine, lysine, arginine. Large fishes was higher in cystine, methionine, tyrosine, phenylalanine content, while lower in aspartic acid, glutamic acid than those of small ones.

• Asian-Australasian Journal of Animal Sciences
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• v.22 no.4
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• pp.598-604
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• 2009

This work was carried out to study the carcass characteristics, the chemical composition and the fatty acid profile in Longissimus muscle (LM) of bull breeds Nellore, NEL (11), Caracu, CAR (12) and Holstein-Friesian, HFR (12) finished in a feedlot. The bulls were fed twice a day with corn silage, cotton meal, cracked corn, urea, limestone and mineral salt. NEL and CAR bulls had similar (p>0.05) final weight and hot carcass weight. However, NEL and CAR bulls had higher (p<0.05) final weight and hot carcass weight than HFR bulls. Carcass hot dressing, carcass conformation, cushion thickness, Longissimus muscle area and texture were similar (p>0.05) among NEL, CAR and HFR bulls. NEL and HFR bulls had higher (p<0.05) carcass length in comparison to the CAR breed. Nellore breed had higher (p<0.05) leg length in comparison to CAR and HFR breeds. Leg length was similar (p>0.05) between CAR and HFR breeds. Thickness fat, color and marbling score were lower (p<0.05) in NEL breed in comparison to CAR and HFR breeds. LM of NEL bulls had higher (p<0.05) meat moisture content in comparison to CAR and HFR bulls. In contrast, lipid content was lower (p<0.10) in HFR bulls. LM ash and crude protein contents were similar (p>0.05) among breeds. Saturated fatty acids (SFA) were higher (p<0.10) in HFR animals. Monounsaturated fatty acids (MUFA), polyunsaturated fatty acids (PUFA), n-6, n-3 and PUFA/SFA ratio were similar (p>0.05) among the different breeds. N-6/n-3 ratio was higher (p<0.05) in CAR animals.

• ALGAE
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• v.36 no.2
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• pp.73-90
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• 2021

Relative to the large number of photosynthetic dinoflagellate species, only a select few possess proteinaceous, carotenoid-rich eyespots which have been demonstrated in other algae to act in phototactic responses. The proteins comprising the different categories of dinoflagellate eyespots are positioned in or near the peridinin-containing photosynthetic plastid membranes which are composed primarily of two galactolipids, mono- and digalactosyldiacylglycerol (MGDG and DGDG). Within eyespot-containing dinoflagellates, this arrangement occurs mostly in those with secondary plastids, although some dinoflagellates with tertiary plastids of diatom origin are known to possess eyespots. We here provide an examination of the MGDG and DGDG composition of eyespot-containing dinoflagellates with secondary, peridinin-containing plastids and tertiary plastids of diatom origin to address the fundamental question of whether eyespots and their component proteins and carotenoids are associated with alterations in galactolipid composition when compared to eyespot-lacking photosynthetic dinoflagellates. This is an important question because the dinoflagellate eyespot-plastid membrane system can be considered a more complicated and evolved state of plastid development. Included in this examination are data on the previously unexamined peridinin- and type A eyespot-containing dinoflagellate Margalefidinium polykrikoides, and the type D eyespot-containing, aberrant plastid "dinotom" Durinskia baltica. In addition, we have reviewed the galactolipid composition of algae from the Chlorophyceae, Cryptophyceae, and Euglenophyceae as a comparison to determine if algal classes apart from the Dinophyceae contain altered galactolipids in association with eyespots. We conclude that the presence of an eyespot in dinoflagellates and other algae is not associated with noticeable changes in galactolipid composition.