• KOREAN JOURNAL OF CROP SCIENCE
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• v.38 no.1
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• pp.15-22
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• 1993

Korean local collected strains of perilla were analyzed on their protein and amino-acid contents in the seed. The strains analyzed were 80 of which grown in the experimental field of Crop Experiment Station at Suwon in 1991. This experiment was performed to obtain the basic informations on the varietal differences of protein and amino-acid contents and further applied in the breeding project for quality improvement of perilla. The seed protein contents of 80 perilla varieties ranged from 17.9% to 24.6% and the average content was 24.6%. There were no differences in protein contents according to the maturity and 1,000 seed weight, but differed by the seed coat color showing 1.4% higher content in light gray than that of drak brown, which may suggest that the seed coat color could be used as a marker gene for breeding high protein varieties. While the total essential amino-acid contents of collected perilla ranged from 36.41% to 44.85%, the mean of 40.55%, the non-essential amino-acid contents was 47.23%～60.01% with the mean of 55.29%. Moreover, there was high positive correlation between the essential amino-acid contents and seed coat color. The essential amino-acids of perilla has an exceptionally high content of arginine, leucine, but methionine indeed being almost marginal. Of the essential amino-acids, lysine, methionine and valine were contained higher compared with the FAO recommendation level.

• Proceedings of the Korean Society of Embryo Transfer Conference
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• 2002.11a
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• pp.80-80
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• 2002

This study was carried out that to investigate the effects of amino acids supplemented with culture medium on development of porcine embryos cultured in vitro. Cumulus oocyte complexes (COCs) were cultured in the maturation medium containing hormones (0.5$\mu\textrm{g}$/$m\ell$ LH, 0.5$\mu\textrm{g}$/$m\ell$ FSH and 1$\mu\textrm{g}$/$m\ell$ estradiol-17${\beta}$) for 20-22 h at 39$^{\circ}C$ in an atmosphere of 5% CO$_2$in air. Subsequently, COCs were cultured in hormone-free maturation medium for 20-22 h. After maturation for 40-44h, oocytes were removed cumulus cells by pipetting and cultured with epididymal sperm for 5 h in the mTBM. Embryos obtained were divided in 4 groups (1) cultured in NCSU 23 containing 0.4% BSA to blastocyst stage(Control), (2) essential amino acids (EA), (3) non-essential amino acids (NA), (4) mixture of essential and non essential amino acid (EA+NA). All treated groups(2-4) were used a glucose free NCSU 23 medium supplemented with pyruvate (0.33 mM), lactate (4.5 mM) to morula stage. From morula to blastocyst stage embryos of all treated groups were cultured in NCSU 23 containing 0.4% BSA. The rates of cleaved oocytes at 48 h after IVF were from 82% to 88% in the groups of control, EA, NA and EA+NA, respectively. The in vitro developmental rates into blastocysts in the groups of EA and EA+NA were significantly (P<0.05) higher than those of group of control (35.1, 35.4 vs. 19.4%, respectively), however, no significant (P<0.05) between control and NA. In conclusion, supplemented with essential amino acid or mixture of essential and non essential amino acid in the culture medium at morula stage increased the rate of development to blastocyst on in vitro produced porcine embryos.

• Journal of the Korean Association of Oral and Maxillofacial Surgeons
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• v.32 no.3
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• pp.200-208
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• 2006

Amino acids are required for protein synthesis and energy sources in all living cells. The amino acid transport system L is a major nutrient transport system that is responsible for $Na^+$-independent transport of neutral amino acids including several essential amino acids. In malignant tumors, the L-type amino acid transporter 1 (LAT1), the first isoform of system L, is highly expressed to support tumor cell growth. In the present study, the expression and functional characterization of amino acid transport system L were, therefore, investigated in Saos2 human osteogenic sarcoma cells. RT-PCR and western blot analyses have revealed that the Saos2 cells expressed the LAT1 and the L-type amino acid transporter 2 (LAT2), the second isoform of system L, together with their associating protein heavy chain of 4F2 antigen (4F2hc) in the plasma membrane, but the expression of LAT2 was very weak. The uptakes of [${14}^C$]L-leucine by Saos2 cells were $Na^+$-independent and were completely inhibited by the system L selective inhibitor, 2-aminobicyclo-(2,2,1)-heptane-2-carboxylic acid (BCH). The affinity of [${14}^C$]L-leucine uptake and the inhibition profiles of [${14}^C$]L-leucine uptake by various amino acids in the Saos2 cells were comparable with those for the LAT1 expressed in Xenopus oocytes. The majority of [${14}^C$]L-leucine uptake is, therefore, mediated by LAT1 in the Saos2 cells. These results suggest that the transports of neutral amino acids including several essential amino acids into Saos2 human osteogenic sarcoma cells are for the most part mediated by LAT1. Therefore, the Saos2 human osteogenic sarcoma cells are excellent tools for examine the properties of LAT1. Moreover, the specific inhibition of LAT1 in tumor cells might be a new rationale for anti-tumor therapy.

• Preventive Nutrition and Food Science
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• v.3 no.2
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• pp.175-179
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• 1998

Some functional properties and nutritive value were determined for the protein concentrated fractionated from chrysanthemum flower in orer to renew interest in the flowers as food. Proximate components of chrysanthemum flower protein concentration (FPC) showed 61.2% protein, 2.0% fat and 35.2% carbhydrate on a dry basis. In amino acid composition of FPC, glutamic acid was the highest in the content, follwoed by aspartic acid, leucine and lysine. The ratio of essential/ total amino acids(E/T) was 0.42, showing a higher level of essential amino acids compared to the FAO reference protein. Digestibility of chrysanthemum FPC by pepsin and trypsin was lwoer than that of casein and was negatively correlative to both water and fat absorptions. Similar characteristics were determined between chrysanthemum FPC and milk casein in their emulsifying activity and emulsion stability. This results indicate that flowers or petals of chrysanthemum might be developed as a good source of protein.

• Food Science and Preservation
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• v.14 no.6
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• pp.624-632
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• 2007

Changes in proximate composition, amino acid, free sugar, reducing sugar and vitamin contents of Curcuma longa L. (autumn woolgeom in Korean) and Curcuma atomatica Salib (spring woolgeom) were investigated according to picking time. Moisture, crude ash, crude protein and crude lipid were increased and non nitrogen substances was decreased by extending the picking time. Contents and ratio of total amino acid to essential amino acids was increased by extending the picking time. Free amino acid was increased by extending the picking time. Ratio of essential amino acids to total amino acids was decreased. Fructose was gradually increased, and then glucose, sucrose and total free sugars were decreased by extending the picking time. Amino acid and sugar contents of Curcuma longa. L. were higher than those of Curcuma atomatica Salib. In contents of vitamin C and $B_1$, Curcuma longa L. was decreased and Curcuma atomatica Salib was increased by extending the picking time.

• Korean Journal of Food Science and Technology
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• v.8 no.3
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• pp.129-135
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• 1976

The amino acid compositions of polished barley grain were investigated for 16 varieties by using amino acid autoanalyzer and simple correlation analysis between them and between protein and amino acid per protein was done. 1) Limiting amino acid is lysine, leucine and phenylalanine are high but threonine and tyrosine are low. Total essential amino acids is high. 2) Protein is significantly correlated negatively with lysine arginine, total basic amino acids (at p=0.01) and threonine, alanine, aspartic acid (at p=0.05) and positively with phenylalanine (at p=0.01) proline and cystine (at p=0.05). 3) Lysine is positively and significantly correlated with arginine and aspartic acid indicating that aspartic acid is probable precursor of lysine and that high yielding varieties or fertilization for high yielding decrease aspartic acid pool resulting low lysine. 4) Lysine content is positively correlated with dye binding capacity (at p=0.01). 5) Tryptophan is positively (at p=0.01) and significantly correlated with histidine, total basic amino acids and arginine. 6) In essential amino acids lysine, tryptophan, threonine and valine simultaneously increase or decrease while aromatic amino acids, sulfur contained amino acids, isoleucine and leucine do so together.

• Journal of Nutrition and Health
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• v.3 no.2
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• pp.87-94
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• 1970

The amino acid composition of human and cow's milk represents a standard of reference in infantnutrition. The amino acid compositions determined by automatic amino acid analyzer, Yanagimote Model LC-5. Protein in the human and cow's milk were found to be hydrolyzed to yield free amino acids. Qualitative data for free amino acids in the milk are as follows: 1) Amounts of acidic amino acids such as glutamic and aspartic acid in cow's milk were obserbed to be about 2 times compared with human milk and it is considered that the abundance in these amino acids may contribute significantly to the specific flavor of cow's milk. 2) It is much interesting that in the human milk the contents of sulfur-containing amino acids were high comparatively better than cow's milk; cystine was found to be 3 times ana methionine, 2 times. 3) In the human milk a high content of some essential amino acids such as threonine, isoleucine and leucine was demonstrated and a specific flavor sweet amino acids. 4) Large amounts of basic amino acid such as histidine was found to occur in human milk and arginine in cow's milk.

• Journal of the Korean Home Economics Association
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• v.23 no.1
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• pp.25-31
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• 1985

This study designed not only to elucidate free amino acid, fatty acid composition and mineral content in dried alaska pollack but also to examine calcium, magnesium, poassium and sodium contents in its cooking broth according to each boiling time such as 2.5, 5, 10, 20, and 30 minutes. RESULTS : 1. Glutamic acid in dried alaska pollack was the most abundant free amino acid and was followed in order of aspartic acid, lysin, leucine and histidine. They composed of 50.95% of the total amino acid contents. 2. In dried alaska pollack the most abundant fatty acid was palmitic acid. Essential fatty acid content was 26.57% of the total fatty acid. 3. The calcium, magnesium, potassium and sodium contents in dried alaska pollack showed 10.721 mg%, 9.235mg%, 4072.5mg% and 2299.8% respectively. The amount of magnesium and potassium in cooking broth arrived at the highest level when 20 minute boiling was undertaken and the quantities of magnesium and sodium were the highest when 30 minute boiling was made.

• Journal of the East Asian Society of Dietary Life
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• v.10 no.3
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• pp.200-207
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• 2000

This study was conducted to investigate the nutritional constituents of pine pollen and the effects of pine pollen on rat liver. Using the chemical components analysis method, the constituents of pine pollen are crude protein(13.97%). crude lipid (6.50%), crude ash (3.25%). Detectable in pine pollen are main fatty acids and non-essential amino acids such as glutamic acid and aspartic acid such as oleic and linoleic acid and 18kinds of amino acid including essential amino acids. The effects of pine pollen on rat liver fed with a high fat diet for 6 weeks showed significant decrease in total lipid and triglyceride as compared with the group fed with a fat diet only. Total cholesterol content decreased by 20.33%. No significant difference was found in total protein content of each group. Pine pollen Is efficacious in preventing geriatric diseases (arteriosclerosis, hyper-lipidemia and cardiovascular system-related diseases).

• Korean Journal of Food Science and Technology
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• v.36 no.4
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• pp.563-567
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• 2004

Nutritional components, such as approximate compositions, and amino acid, mineral, vitamin, sugar, and fatty acid contents, of artificially cultivated Pleurotus ferulea were analyzed. Contents of carbohydrates, crude lipids, dietary fibers, crude proteins, total amino acids, particularly essential amino acids, minerals, water-insoluble and-soluble vitamins, glucose, and unsaturated fatty acids such as linoleic acid of P. ferulea were higher than those of P. ostreatus and P. eryngii. Results indicate P. ferulea has abundant essential nutrients and thus is good source of functional healthy food.