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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Journal of the Korean Society of Food Science and Nutrition
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Journal DOI :
The Korean Society of Food Science and Nutrition
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Volume & Issues
Volume 33, Issue 10 - Dec 2004
Volume 33, Issue 9 - Nov 2004
Volume 33, Issue 8 - Oct 2004
Volume 33, Issue 7 - Aug 2004
Volume 33, Issue 6 - Jul 2004
Volume 33, Issue 5 - Jun 2004
Volume 33, Issue 4 - Apr 2004
Volume 33, Issue 3 - Mar 2004
Volume 33, Issue 2 - Feb 2004
Volume 33, Issue 1 - Jan 2004
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Antioxidative and Antimutagenic Effects of Korean Buckwheat, Sorghum, Millet and Job기s Tears
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 921~929
DOI : 10.3746/jkfn.2004.33.6.921
Dietary intake of whole grains, vegetable and fruit is known to reduce the degenerative chronic diseases, such as cancer and cardiovascular diseases. Antioxidative and antimutagenic effects of the ethanol extract of Korean Millet, Buckwheat, Sorghum and Job`s tears were examined by inhibition against iron-induced linoleate per-oxidation, DPPH (1,l-diphenyl-2-picrylhydrazyl) radical generation and MDA-BSA (malondialdehyde-bovine serum albumin) conjugation, and Ames test using Salmonella. Buckwheat showed the strongest antioxidative effect in three different systems among these four grains, but it showed the lowest antimutagenic effect. Sorghum was the second to Buckwheat in iron-induced linoleate peroxidation inhibition activity and DPPH radical scavenging activity, and showed very good direct-antimutagenic effect in 2-Nitrofluorene treated Salmonella Typhimurium TA98 and indirect-antimutagenic effect in 2-Anthramine treated Salmonella Typhimurium TA98 and TA100 with hepatic S9 mixture. Millet showed the strongest antimutagenic effect in Salmonella Typhimurium TA98 and TA 100 with or without S9. Buckwheat contained the highest total flavonoids and polyphenols, 1.14 mg/g and 3.71 mg/g, respectively. Total flavonoid content in these four grains was negatively correlated with
/ for DPPH radical scavenging antioxidative effect significantly (r
Antimutagenicity of Soybean Sprouts Cultured with Germanium
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 930~935
DOI : 10.3746/jkfn.2004.33.6.930
This study was carried out to determine the antimutagenic effect of soybean sprouts cultured in water containing germanium by Ames test and SOS chromotest. Germanium significantly inhibited the mutagenicity induced by aflatoxin B
) in Salmonella typhimurium TA100 by Ames test, and 4-nitroquinoline-N-oxide (4-NQO) in SOS chromotest. Juice from germanium treated soybean sprouts (GTS) inhibited 57∼75% mutagenicity induced by AFB
, N-methyl-N`-nitro-N-nitrosoguanidine (MNNG) and 4-NQO compared with 20∼48% inhibition rate of control soybean sprouts (germanium non-treated soybean sprouts, GNTS) in the Ames test. Also, methanol extracts from GTS inhibited 65% mutagenicity induced by AFB
in Salmonella typhimurium TA100, and 51% mutagenicity by 4-NQO in SOS chromotest. Therefore, it suggests that GTS has strong potential antimutagenic effect.
Inhibitory Effect of Methanol Extract of Doenjang on Growth and DNA Synthesis of Human Cancer Cells
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 936~940
DOI : 10.3746/jkfn.2004.33.6.936
Doenjang (Korean soy paste) is one of the popular soybean based fermented foods in Korea. This study investigated the growth and DNA synthesis inhibitory effect of doenjang methanol extracts on AGS human gastric adenocarcinoma cells, Hep 3B human hepatocellular carcinoma cells and HT-29 human colon cancer cells. In order to determine an anticancer effect of doenjang methanol extracts, other soybean fermented foods and original materials were compared. The treatment of doenjang methanol extracts (200
/mL) to the AGS, Hep 3B and HT-29 cancer cells inhibited the growth of cancer cells by 80%, 77% and 86%, respectively. Compared to other soybean fermented foods and original materials, doenjang methanol extracts showed the highest growth inhibitory effect on different cancer cells. In addition, doenjang methanol extracts (200
/mL) significantly inhibited DNA synthesis of AGS and Hep 3B cancer cells by 76% and 59%, respectively. These results suggested that this anticancer effect of doenjang may be due to specific active compounds, which will be newly produced during soybean fermented process and not contained in soybean.
Comparison on Antioxidant Potential of Several Peanut Varieties
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 941~945
DOI : 10.3746/jkfn.2004.33.6.941
To increase utilities as functional materials, nine peanut varieties were evaluated on antioxidant activity and total phenol content. Peanut varieties were individually divided into three parts such as part without seed coat, seed coat, and seed. Each of the 80% ethanol-extracted solutions from the parts was used for the assay. Inhibitory activities on low density lipoprotein (LDL) oxidation by the part without seed coat, seed coat, and seeds from 9 varieties were respectively 85.3∼91.0%, 77.4∼85.8%, -1.7∼46.1%, and those on linoleic acid oxidation were 94.0∼94.9%, 94.2∼95.0%, 69.4∼80.2%, respectively. Seed coats, parts without seed coat, and seeds from 9 peanut varieties showed scavenging activities as 88.3∼98.7%, 16.7∼56.3%, -28.0∼20.0% on superoxide anion radical and as 89.9∼90.8%, 6.0∼12.0%, 0.6∼2.1% on 1,1-diphenylpicrylhydrazyl (DPPH) radical, respectively. Total phenol contents of seed coat, seed, and part without seed coat were 12.7∼21.0 mg%, 2.46∼4.24 mg%, 0.94∼1.16 mg% as tannic acid equivalent and those of Daekwang, Daesin, Bowon, Saedl, Kipung among the peanut varieties were comparatively high. In conclusion, Daekwang, Daesin, Kipung, and Saedl among the peanut varieties showed comparatively effective antioxidant activities.
Quinone Reductase Inducer from Radish Leaf Cultivated in the Soil Containing Sulfur
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 946~950
DOI : 10.3746/jkfn.2004.33.6.946
Young radishes which were grown in the soil containing sulfur increased quinine reductase (QR) activity in Hepa 1clc cells and isothiocyanate-like compound analyzed by HPLC. QR inducing activity was maximum in young radishes grown with 1,818 g/㎥ sulfur and was decreased when the soil was neutralized with lime mortar in order to improve a recovery. These results have suggested that consumption of young radishes, especially grown in the presence of sulfur, would prevent from cancer incidence through inducing detoxification enzymes and could have therapeutic effects for chemoprevention.
Hypoglycemic Effects of Crude Extracts of Prunus mume
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 951~957
DOI : 10.3746/jkfn.2004.33.6.951
Hypoglycemic effect of Prunus mume (PM) extract containing in Sangjinyangheul-tang and Hwangkeumtang, one of the diabetic herbal medicines, was determined by investigating insulin-like action, insulin sensitizing action and a-glucoamylase suppressing action. Insulin-like activity of 3T3-L1 fibroblast was not shown with the treatment of PM methanol extracts. However, treatment with 20% or 40% PM methanol extracts and differentiation inducers significantly decreased the differentiation of 3T3-L1 fibroblasts to adipocytes. A significant insulin sensitizing activity was observed in 3T3-L1 adipocytes, giving PM extracts (60%, 80% and 100%) with 1 ng/mL insulin to reach glucose uptake level increased by 50 ng/mL of insulin alone. In addition, 20% and 40% methanol extracts of PM suppressed the a-glucoamylase activity by 30% in vitro. However, there was no significant differences in the peak of serum glucose levels and area under the curve in Sprague Dawley male rats treated with PM ethanol extract or cellulose and 2 g maltose or dextrin/kg body weight. These data suggested that PM extracts contain effective insulin sensitizing compounds, lipid synthesis suppressing compounds and possibly a-glucoamylase suppressing compounds. Therefore, PM extracts are beneficial for anti-diabetic treatment in obese diabetic patients.
Effects of Ca Supplementation on Mineral Metabolism during Pregnancy and Lactation of Calcium-Deficient Young Adult Rats
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 958~964
DOI : 10.3746/jkfn.2004.33.6.958
This study examined the effects of maternal calcium intake levels on mineral metabolism during pregnancy and lactation. Five week-old female Sprague-Dawley rats were fed normal Ca (NCa, 0.5%) and low Ca (LCa, 0.15%) diets for 5 weeks during preconception. The low Ca intake group was divided into three groups and fed low Ca (0.15%), normal Ca (0.5%) and high Ca (1.5%) diets for 6 weeks during pregnancy and lactation. All of the rats were mated with normal male rats. The control group was consistently fed a normal Ca diet for 11 weeks. Pups were adjusted to 10 per dam. After weaning, dams and their weaned rats were sacrificed. We measured total protein, albumin, alkaline phosphatase and mineral content in serum and weight, length, breaking force, ash and mineral content in bone and kidney. There was no significant difference in weight gain and food intake among the groups. Serum total protein and albumin were in the normal range but slightly decreased with a low Ca diet during preconception. Calcium supplementation above normal level increased bone weight, Ca content and breaking force in femur of maternal and their weaned rats. However, high maternal Ca intake significantly decreased Mg and Fe contents in maternal serum and bone and Mg and Zn contents in serum of weaned rats. Also, it induced Ca, P and Mg deposit in maternal kidney. Our experimental results suggest that Ca deficiency during preconception may deteriorate bone status of mother and their offsprings. Moreover, high Ca supplementation during pregnancy and lactation may lead to disturb mineral metabolism in bone and other tissues.
Effect of Dietary Monascus Koji on the Liver Damage Induced by Bromobenzene in Rats
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 965~972
DOI : 10.3746/jkfn.2004.33.6.965
In the present study, it is observed that Monascus diet may have a hepatoprotective effect on the liver damage induced by bromobenzene in rats. By treatment with bromobenzene (400 mg/kg, i.p.) once a day for 3 consecutive days, the liver damage was reduced in rats fed 2% Monascus diet, based on the liver functional and histopathological findings. Furthermore, retreatment of bromobenzene to the animals with damaged liver showed higher decreasing rate of hepatic glutathione content and increasing rate of cytochrome P450 dependent aniline hydroxylase activity at 4 h in rats fed 2% Monascus diet than those fed STD diet, and V
in glutathione S-transferase was higher in liver of rats fed 2% Monascus diet than those fed STD diet. On the other hand, activities of antioxidant enzymes such as hepatic glutathione S-transferase, catalase and superoxide dismutase were generally higher both in bromobenzene and 2% Monascus diet treated group than those fed STD diet. In conclusion, the rats fed 2% Monascus diet showed lower liver damage than those fed STD diet, which may be due to the acceleration of bromobenzene metabolism and detoxication of oxygen free radicals.s.
Effect of Maengjong-Juk Extract Coated Rice Supplementation on Antioxidative System in Rabbit Fed High Cholesterol Diet
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 973~980
DOI : 10.3746/jkfn.2004.33.6.973
To evaluate the antioxidative effect of rice coated with maengjong-juk extract in vivo system, rice coated with maengjong-juk extract diets were fed to NZW rabbit for 16 weeks and lipid peroxidation, protein oxidation, activities of antioxidative enzymes and total glutathione content in tissues were measured. TBARS contents in liver and spleen were significantly decreased in maengjong-juk extract diet group compared to control group, while those in kidney and heart tissue were not significantly different. Maengjong-juk extract diet suppressed the protein oxidation significantly in liver, spleen, kidney and heart tissues. Hepatic total SOD, Cu
Zn-SOD and Mn-SOD activities of maengjong-juk extract diets were significantly higher than those of control diet. GSH-Px and catalase activities of maengjong-juk extract diet were higher than those of control, while GR activities show no significant difference between the two groups. Total hepatic glutathione content was significantly increased by maengjong-juk extract diet. According to this study, many antioxidative materials and phytochemicals in maengjong-juk extracts seems to protect tissues from oxidative stress by stimulating antioxidative systems in atherosclerotic rabbit fed high cholesterol diet.
Effect of Physiologically Active Compounds Isolated from Platycodon grandiflorum on Streptozotocin-Induced Diabetic Rats
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 981~986
DOI : 10.3746/jkfn.2004.33.6.981
This study were investigated the effects of physiologically active compounds isolated from Platycodon grandiflorum on streptozotocin-induced diabetic rats. The experimental groups were divided into six groups, normal, diabetic control (CM), and four experimental groups (inulin (IN), inulin + saponin (IS), oligosaccharide (OS), and total extract group (WE)). The rats have free access to water and diet. Experimental groups were administered orally with inulin (630 mg/mL), inulin (630 mg/mL) + saponin (25.2 mg/mL), oligosaccharide (367.5 mg/mL), and total extract (225 mg/mL) into the diabetic rats for 5 weeks after STZ injection; The levels of fasting blood glucose in diabetic control increased by 10.0% for 5 weeks, but the level of blood glucose in inulin and total extract groups decreased by 21.3% and 21.2%, respectively. The concentrations of total cholesterol and triglyceride in serum of diabetic rats fed physiologically activity compounds were lower than those in diabetic control rats. HDL-cholesterol was similar among all the groups. Weights of testicle and heart were lighter, while weight of kidney was significantly increased in diabetic groups than normal group. The concentrations of serum protein insulin and albumin in diabetic groups were significantly decreased compared with those of the normal group. Urinary glucose excretion was decreased in inulin group than other diabetic groups.
Effects of Dietary Seaweed on Blood Glucose, Lipid and Glutathione Enzymes in Streptozotocin-Induced Diabetic Rats
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 987~994
DOI : 10.3746/jkfn.2004.33.6.987
The purpose of this study was to investigate the effect of dietary seaweed in diabetic rats treated with streptozotocin (STZ) for 7 weeks. The rats (Sprague-Dawley male rats, 180∼200 g) were divided into 4 groups : normal rats fed control diet (C), diabetic rats fed control diet (CD), normal rats fed seaweed diet (M), and diabetic rats fed seaweed diet (MD). Diabetes was induced by single injection of streptozotocin (60 mg/kg, i.p.). Urinary levels of calcium and uric acid, and blood levels of hemoglobin, total cholesterol and low density lipoprotein (LDL)-cholesterol were not significantly different among groups. But high density lipoprotein (HDL)- cholesterol of M and MD groups were higher than that of C and CD groups. Activity of hepatic microsomal G6Pase was significantly (p<0.05) lower in C and M groups than that of CD and MD groups. Hepatic glutathione S-transferase (GST) of M, CD and MD groups were significantly lower than C group (p<0.05), glutathione peroxidase (GPX) of C, M and MD groups were higher than CD group. In conclusion, dietary seaweed may improve blood lipid profiles and GSH-related enzymes in STZ-induced diabetic rats.
Effects of Liquefied Calcium Supplement on Bone Mineral Density in Middle-Aged Women
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 995~999
DOI : 10.3746/jkfn.2004.33.6.995
Effects of liquefied calcium supplement on bone mineral density (BMD) and bone health index (osteocalcin, deoxypyridinoline) were investigated in 12 middle aged women. Middle aged women were arranged into 3 groups such as control, Ca500 and Ca750 by liquefied calcium supplement level. BMD was measured at the spine (vertebrae L2-L4). After 6 month, BMD of control group dropped but that of Ca750 were increased from 0.850 to 0.865. The increase in serum calcium and osteocalcin level, and the decrease in urine deoxypyridinoline level were observed in by calcium supplement groups. The bone health index of serum was changed as much as level of calcium supplement. The serum osteocalcin level of Ca750 significantly increased to 7.93 ng/mL after 6 months of calcium supplement. Although we didn`t get any significant difference in BMD, we found that the liquefied calcium had no side effect and led effective change in bone health index. Hereafter, we suppose that the liquefied calcium will be available to develop healthy products for preventing osteoporosis.
Enzymatic Synthesis of Structured Lipids Containing Conjugated Linoleic Acid from Extracted Corn and Peanut Oil
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 1000~1005
DOI : 10.3746/jkfn.2004.33.6.1000
Structured lipids (SLs) were synthesized by acidolysis of crude oils (corn and peanut oil) and conjugated linoleic acid (CLA) with a molar ratio of 1:3 (extracted oil:CLA) in a shaking water bath. The reaction was performed for various reaction time (1, 2, 3, 6 and 24 hr) at 55
with 175 rpm catalyzed by sn -1,3 specific IM 60 lipase from Rhizomucor miehei. The content of the incorporated CLA increased with the prolonged reaction time, showing 7.5∼9.3 ㏖% in the synthesized SL triacylglycerol molecules from the extracted corn and peanut oil. However, total tocopherol content in SLs decreased up to about 20% compared to the content in extracted oils. Among the CLA isomers, 6.3∼7.5 ㏖% of cis 9,trans 11- and trans 10,cis 12-CLA known as physiologically active compounds are contained in corn and peanut SLs.
Physicochemical and Sensory Properties of Commercial Salt-Fermented Shrimp
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 1006~1012
DOI : 10.3746/jkfn.2004.33.6.1006
We evaluated physicochemical and sensory characteristics of 25 commercial salt-fermented shrimps by kind (Oh Jeot, Yook Jeot and Chu Jeot) by manufacturer (traditional marketer (TS) ＆ company (CS)). Salinity and pH ranged 17.9∼28.7% and 7.82∼8.74, respectively, of which Chu Jeot was somewhat higher in salinity and pH, compared with those of the others. Amino nitrogen (AN), volatile basic nitrogen (VBN) and thiobarbituric acid reactive subjects (TBARS) showed great variation ranged with 21.41∼661.13 mg%, 263.2∼1180.2 mg% and 0.507∼1.322
/g, respectively. Hunter color of L value was 53.99∼67.45, a value, 4.98∼12.06 and b value, 4.45∼10.4. Physicochemical quality showed greater variations in Chu Jeot of TS than that of CS. Products of CS have higher salinity while lower VBN and AN than those of TS. Sensory results showed that mean scores of appearance, over-all taste, over-all flavor and over-all acceptability between TS and CS were not significantly different. The mean score of over-all acceptance was the highest in Yook Jeot. Physicochemical and sensory characteristics of salt-fermented shrimps in a PCA plot comprised of first principal component (68.36%) and second principal component (31.36%).
Inhibition of Enzymatic Browning of Taro (Colocasia antiquorum var. esculenta) by Maillard Reaction Products from Glycine and Glucose
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 1013~1016
DOI : 10.3746/jkfn.2004.33.6.1013
The inhibitory effect of MRPs (Maillard reaction products) on enzymatic browning of taro was investigated. The MRPs prepared by heating glycine and glucose at 9
for 7 hr exhibited a strong inhibitory effect on taro polyphenol oxidase (PPO). The maximum inhibitory activity of MRPs against taro PPO was detected toward (＋)-catechin, catechol, 4-methylcatechol followed by L-
-3,4-dihydroxyphenylalanine (L-DOPA) and pyragallol as a substrate. The MRPs synthesized from fructose and glucose with glycine as a amino acid significantly reduced the taro PPO activity. MRPs prepared by higher glycine or glucose concentration showed stronger inhibition against taro PPO. Increasing reaction time of the glycine and glucose promoted the inhibitory effect of MRPs against the PPO activity of taro, whereas the color formation was gradually increased.
Isolation of Trp, Thr Overproducing Strain of Saccharomyces cerevisiae
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 1017~1021
DOI : 10.3746/jkfn.2004.33.6.1017
To isolate a mutant which overproduces threonine and tryptophan, mutants of Saccharomyces cerevisiae were screened after UV and EMS mutagenesis. Hydroxynorvaline, a Thr analogue was used for selection of a Thr-overproducing mutant after UV mutagenesis. Among 31 mutants, TC 5-1 was selected as the strain candidate, based on amino acid analysis. TC 5-1 was then treated by EMS mutagenesis for Trp overproduction. Eight mutants were selected using fluorotryptophan for Thr and Trp overproducing strains. Amino acid analysis results showed that TC 6-1 was the best strain since it had the highest amount of Thr and Trp among mutants.
Stability and Isolation of Monacolin K from Red Yeast Rice
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 1022~1027
DOI : 10.3746/jkfn.2004.33.6.1022
The monacolin K content was determined to investigate the stability of monacolin K from red yeast rice after heating (20∼8
), adjusting the pH (2∼8) by adding 3 N HCl or 3 N NaOH, adding the organic acid (6.0% acetic acid, 0.6% citric acid, 1.5% lactic acid) to pH 4.0 and adding the water (0∼80%). And the monacolin K was isolated from red yeast rice by conducting open column chromatography using neutral aluminum oxide. As a result, the stability of monacolin K decreased with increasing the temperature. The stability for pH was in the order of the unadjusted pH (pH 5.9)>8>4 and pH 2>10. The stability for organic acid was high in the order of lactic acid>citric acid>acetic acid, and the stability of monacolin K under acid was different according to the acid type. The degradation rate of monacolin K increased with increasing the water content. Moreover monacolin K was able to isolate from red and pink pigments as well as the other noncoloric compounds in red yeast rice. The yield of monacolin K was found to be 70%.
Quality Properties of Cream Soup Added with Chungdong Pumpkin and Sweet Pumpkin
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 1028~1033
DOI : 10.3746/jkfn.2004.33.6.1028
This study was conducted to improve the quality properties of cream soup in accordance with the added amount of sweet pumpkin and Chungdong pumpkin, roux and chicken stock. As the amount of pumpkin was increased, red (a-value) and yellow (b-value) colors increased but its lightness (L-value) remarkably decreased. Also, there was a significant differences in viscosity, color, appearance and overall preference of sensory evaluation. In pumpkin 150 g (37.5%) added, the degree of total preference was high. As the added amount of roux was increased, red and yellow colors decreased by small margin and there was a significant differences in color, flavor, appearance and overall preference of sensory test. At adding roux of 5 mL (1.5%) showed the highest preference. With the adding chicken stock increase the lightness, red and yellow color decreased. It was found by sensory evaluation that there were significant differences in viscosity, color, flavor, appearance and overall preference. At adding chicken stock 150 mL (37.5%) and milk of 50 mL (12.5%) showed the high score in flavor, appearance and total preference.
Effects of Red Peppers on the Its Pungency and Color during Kimchi Fermentation
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 1034~1042
DOI : 10.3746/jkfn.2004.33.6.1034
This study was carried out to investigate preparation of reconstructed red peppers, effects of pungency and redness of red peppers on the Kimchi quality using central composite design and response surfaces methodology. Capsaicinoids and ASTA (American Spice Trading Association) value put in X
of independent variable. The result of response surface regression analysis of reconstructed red peppers, correlation coefficient (
) of overall pungency intensity, persistence and degree of redness was 0.935, 0.935 and 0.821, respectively. After it was made Kimchi samples with reconstructed red peppers, it was examined pH, titratable acidity and lactic acid bacteria of its during fermentation. In the initial fermentation period of Kimchi, it showed pH of 5.46∼5.78, titratable acidity of 0.27∼0.31%, salt content of 2.26∼2.48% and lactic acid bacteria of 4.05
, respectively. And it showed traditional fermentation pattern in the pH, titratable acidity and microbes of the middle (appropriate fermentation) and last (excessive) fermentation period. While capsaicinoids content in the Kimchi decreased a little according to extend fermentation period, ASTA value showed low correlation reconstructed red pepper and fermentation period. Also, it was analyzed correlation coefficient (
) of independent variables (capsaicinoids, X
; ASTA value, X
) between sensory attribute in the Kimchi during fermentation. The result of regression analysis,
in the overall pungency intensity, persistence and degree of redness showed 0.515, 0.675, 0.784, respectively.
Development of Yeast Leavened Pan Bread Using Commercial Doenjang(Korean Soybean Paste): 3. The Effects of Protein Dispersibility of Doenjang Powders and Soy Flours on the Gluten Rheology and Bread Quality Characteristics
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 1043~1048
DOI : 10.3746/jkfn.2004.33.6.1043
This study was carried out to investigate the effect of soy protein dispersibility on the bread making properties when Doenjang powders (DP) were added to the bread formula at the levels of 2.5 or 5.0%, comparing with full fat (FSF) or defatted (DSF) soy flours which contain same protein contents as those of DP. Protein dispersibility indices (PDI) for DP, FSF, DSF and strong wheat flour were 57.1, 7.3, 10.8 and 32.8%, respectively. Addition of DP decreased significantly the resistance to extensibility of wet gluten and increased its extensibility. However, FSF and DSF showed different changes in gluten rheology due to their PDI. In correlation coefficient values, PDI affected positively both gluten extensibility (r
Quality Characteristics of Fried Fish Paste Added with Ethanol Extract of Onion
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 1049~1055
DOI : 10.3746/jkfn.2004.33.6.1049
The effects of ethanol extract of onion (EEO) on the qualify of fried fish paste were investigated. EEO was added at 0, 1, 3 and 5% level. Quality attributes including moisture content, pH, acid value, TBA value, volatile basic nitrogen, color value, viable cell count and sensory evaluation were analyzed. Moisture content was not changed by addition of EEO. Increasing the amount of EEO, pH, acid value and TBA value of fried fish paste tended to decreased but volatile basic nitrogen increased. L-value was decreased and a-value and b-value were increased by addition of EEO. Viable cell count was decreased by addition of EEO. In sensory evaluation, the higher amount of EEO obtained higher favorite score in flavor and taste, and 3% EEO had the best score in overall acceptance. These results suggest that EEO can be applied to fried fish paste for the purpose of high quality and functionality.
Migration of Low Molecular Weight Substances from Expanded Polystyrene Cup to Aqueous Food Simulant
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 1056~1062
DOI : 10.3746/jkfn.2004.33.6.1056
Migration of low molecular weight components from expanded polystyrene (ESP) to distilled water was measured at different temperature conditions. Overall migration and specific monomer migration were measured. Diffusion model based on Fick`s law was used to determine the apparent diffusion coefficients at various experimental conditions. The overall and specific migration levels were estimated to give some practical implications for regulatory guideline development and safe package design. Diffusion coefficients for overall migration in KMnO
oxidizable extractives and specific migration of styrene monomer from ESP at 6
were 0.030 and 6.8
/h, respectively. Their temperature dependence could be explained by Arrhenius equation with respective activation energies of 80.5 and 98.6 kJ/㏖. Experimental conditions ensuring desired migration level were suggested for reliable examination of migration from the packaging material. Some explanatory estimations of migrations were given for some typical conditions of potential usages.
Physical Properties of Protein Films Containing Green Tea Extract and Its Antioxidant Effect on Fish Paste Products
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 1063~1067
DOI : 10.3746/jkfn.2004.33.6.1063
To elucidate the effect of protein films containing an antioxidant on lipid oxidation of fish paste products during storage, zein and soy protein isolate (SPI) films containing green tea extract were prepared and their physical properties were examined. Tensile strength and elongation of the protein films decreased by the addition of green tea extract compared to the control. Due to the addition of green tea extract, SPI film had an increase in yellowness, but zein film had a decreased yellowness. Wrapping of fried fish paste products by the zein and SPI films containing the antioxidant retarded lipid oxidation at 2 day storage by 3.6 mg MDA/kg sample and 3.6 mg MDA/kg sample, respectively, for instant fish paste compared to the control. For processed fish paste, they decreased the degree of lipid oxidation by 1.6 mg MDA/kg sample and 0.6 mg MDA/kg sample, respectively.
Optimization of Hot Water Extraction Conditions from Hericium erinaceus
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 1068~1073
DOI : 10.3746/jkfn.2004.33.6.1068
Response surface methodology (RSM) was used to monitor characteristics of hot water extracts from Hericium erinaceus. A central composite design was applied to investigate the effects of independent variables, extraction temperature (X
), sample ratio (X
) and extraction time (X
) on dependent variables such as soluble solid (Y
), total phenols (Y
), crude protein (Y
) and electron donating ability (Y
) of the extracts. As the sample ratio increased, the soluble solid content increased, while extraction temperature played a minor role. As a whole total phenols and crude protein contents increased with increasing the sample ratio. Electron donating ability increased in proportion to extraction temperature and sample ratio, which didn`t increase at certain period. Then ranges of optimum extraction conditions for maximized physicochemical properties were 91.5∼96.5
in extraction temperature and 3.5∼4.2 g/100 mL in sample ratio. Predicted values at the optimized conditions were coincident with experimental values.
Activity of the Extracts from Polyporus umbellatus as a Apoptosis Inducer
Journal of the Korean Society of Food Science and Nutrition, volume 33, issue 6, 2004, Pages 1074~1077
DOI : 10.3746/jkfn.2004.33.6.1074
The effect of gradient eluted fractions from Et
O extracts of Polyporus umbellatus screlotium was investigated on the viability of leukemia cell lines, K-562, L-1210, HL-60 and U-937 cells. Among those fractions, fraction 2 showed mild cytotoxic effect on L-1210 and HL-60 cells. Fraction 3 showed cytotoxic effect on 4 cell lines, and cytotoxic effect was the most potent on L-1210. The hallmark of apoptosis, DNA fragmentation, also appeared by fraction 3 on L-1210 after 48 hr treatment. Furthermore, this fraction was shown to be able to induce cell death on L-1210 cells by the inhibition of DNA synthesis in [
H]thymidine incorporation test. From these results, P. umbellatus involves a potent chemical component that inhibits the viability of leukemia cell lines, L-1210. Further studies about the components of fraction 3 to function as a apoptosis inducer are necessary.