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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Korean Journal of Food Science and Technology
Journal Basic Information
Journal DOI :
Korean Society of Food Science and Technology
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Volume & Issues
Volume 39, Issue 6 - Dec 2007
Volume 39, Issue 5 - Oct 2007
Volume 39, Issue 4 - Aug 2007
Volume 39, Issue 3 - Jun 2007
Volume 39, Issue 2 - Apr 2007
Volume 39, Issue 1 - Feb 2007
Selecting the target year
Volatile Flavor Components in the Mashes of Takju Prepared Using Different Yeasts
Lee, Heung-Sook ; Lee, Taik-Soo ; Noh, Bong-Soo ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 593~599
In this study, we examined the volatile flavor components in the mashes of takju prepared using different yeasts such as Saccharomyces coreanus, S. ellipsoideus, S. carlsbergensis, S. cerevisiae (Baker's yeast), and S, rouxii by GC and GC-MS. Fourteen alcohols, 13 esters, 5 acids, 3 aldehydes, 7 amines, and 2 other compounds were identified in the mash after 6 days of fermentation. On day 6, the takju fermented by S. coreanus had the greatest variety of volatile flavor components. Fifteen flavor components, including ethanol, isobutyl alcohol, isoamyl alcohol, methyl pentanol, 1,3-butanediol, 3-methylthio-1-propanol, benzeneethanol, ethyl lactate, acetic acid, acetaldehyde, and 1,3-cyclohexane diamine, were typically detected in all the treatments. The relative peak areas of the volatile components were as follows: alcohols (96.758-99.387%), esters (0.081-0.968%), acids (0.040-0.640%), aldehydes (0.266-0.959%), and amines (0.011-0.047%). In particular, 1-propanol, isobutyl alcohol, 3-methyl-1-butanol, 2,3-butanediol, trimethyl benzylalcohol, heptene-2,4-diol, ethyl lactate, diethyl succinate, ethyl nonanoate, methyl hexadecanoate, linoleic acid, hexadecanoic acid, and acetaldehyde were hish in the takju made by S. coreanus. Also, ethyl stearate was high in the takju made by S. carlsbergensis, and hexanoic acid was high in the takju made by S. cerevisiae. Finally, methyl pentanol, 1,3-butanediol, 3-methylthio-1-propanol, benzene ethanol, ethyl octadecanoate, acetic acid, pentanal, and 1,3-cyclohexane diamine were high in the takju made by S. rouxii.
Characteristics of Thiosulfinates and Volatile Sulfur Compounds from Blanched Garlic Reacted with Alliinase
Choi, Yoon-Hee ; Shim, You-Sin ; Kim, Cheong-Tae ; Lee, Chan ; Shin, Dong-Bin ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 600~607
In this study, attempts were made to develop a method for controlling the volatile sulfur compounds in garlic. Crude alliinase extracted from fresh garlic was applied to garlic pulp blanched far 5 min at
, and the changes in the thiosulfinates and volatile compounds of the blanched garlic pulp reacted with the enzyme were investigated. Eight kinds of thiosulfinates from garlic were separated by HPLC, and identified by LC/MS/MS. When the alliinase was added to the blanched garlic pulp at 100, 200, 300, or 400 units, and reacted for 15 min, respectively, thiosulfinates were generated in the amounts of 37, 68, 77, and 80% of the fresh garlic content (control). Under the same conditions, we analyzed the volatile compounds, where 28 peaks were identified by GC/MSD. Of the 28 peaks, 23 were volatile sulfur compounds. The results of the analysis showed that all the volatile compounds were generated at amounts of 25, 36, 66, and 76% of the content of the control, respectively. These results indicate that the sulfur compound content of garlic can be regulated, depending upon the reaction conditions of allinase.
Effects of Fermented Rice Bran Addition on the Quality Improvement of Pork
Kim, Dong-Yeop ; Fan, Jiang Ping ; Choi, Da-Hei ; Park, Hyun-Sil ; Han, Gi-Dong ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 608~613
This study was conducted to evaluate the meat quality of pork produced by feeding fermented rice bran (FRB) (10 to 20%). In the proximate composition analysis there were no significant differences, but the FRB treated groups showed a tendency for higher moisture content and a lower fat content. There were no significant changes found in the physicochemical property analysis, except for cooking loss and water holding capacity, which are the most important factors for estimating meat quality. The cooking loss of the FRB pork was significantly lower than that of the control group (p<0.01). The water holding capacity of the 20% FRB roup was higher than that of the control group (p<0.01). The shear force value of the 20% FRB group was also higher than that of the control group, but the 10% FRB group showed no difference from the control group. The total free amino acid volume of the meat increased, depending on the volume of FRB added. The contents of glutamic acid, glycine, and alanine, which are important factors for taste and flavor, were higher in the FRB groups an the control group. In the sensory analysis, the FRB groups showed high scores for color, aroma, flavor, juiciness, taste, and overall acceptability. Taken together, adding FRB to the feed improved the quality of pork.
Effect of Irradiation on the Quality Characteristics of Lyophilized Kimchi Powder
Hong, S.P. ; Kim, E.M. ; Yang, J.N. ; Ahn, D.U. ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 614~618
The effect of irradiation on the quality characteristics of lyophilized kimchi powder was investigated in order to develop a commercial kimchi seasoning. Fresh and fermented kimchi powders were irradiated at 0, 1.5, 5, 10 and 30 kGy using a Linear Accelerator. By increasing the irradiation dose level,
(yellowness) values of the kimchi powders were decreased, while
(lightness) value remained relatively unchanged as compared to the control. As the main volatile compounds, butanal, 2-butanone and acetic acid were produced in both of the kimchi powders at 30 kGy and dipropyl disulfide was detected only in the fermented kimchi. The viable counts of aerobic bacteria, yeasts, molds, and lactic acid bacteria in the kimchi powder were significantly reduced by all irradiation doses. However, aerobic and lactic acid bacteria were still observed in both of the kimchi powders at 30 kGy. No significant off-odors or off-tastes were produced in either of the kimchi powders by irradiation, while pungency decreased after irradiation. These results suggest that irradiated kimchi powder could be used as a kimchi seasoning.
Production of Sedum Extract Adding Jelly and Assessment of Its Physicochemical Properties
Mo, Eun-Kyoung ; Kim, Hyun-Ho ; Kim, Seung-Mi ; Jo, Hyun-Ho ; Sung, Chang-Keun ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 619~624
Sedum sarmentosum, also blown as stonecrop (dolnamul), is a widely consumed herb, and is used as an ingredient in salads in Korea. Unfortunately, sedum is perishable and vulnerable to tissue damage during preservation. Therefore, this feasibility study was performed in order to increase the availability of sedum and increase its value. Various concentrations of sedum extract (0.5-3%) were added to gelatin jelly, and their physicochemical properties were determined. The ascorbic acid content of the sedum jelly increased in proportion to the sedum extract concentration. Calcium content of the sedum jelly was 4 to 28 times higher than that of the control. Contrary to the control, iron was detected in the sedum jelly (0.023-1.031 mg/100 g dry weight). Furthermore, magnesium and potassium levels were higher in the sedum extract groups. There were significant differences (p < 0.05) in greenness (a value) and yellowness (b value) between the control and the sedum extract groups. However, significant differences between the 2% and 3% sedum extract groups were not detected. As sedum extract concentration increased, the pH level of soft jellies (solid state) decreased. Therefore, hardness and gumminess were decreased significantly. These results are in agreement with the sensory evaluation. According to sensory tests, the values for palatability, appearance, and color in the 2% sedum extract group were higher than those of the 0.5-1% and 3% sedum extract groups.
Anti-wrinkle Activity of Low Molecular Weight Peptides Derived from the Collagen Isolated from Asterias amurensis
Kwon, Min-Chul ; Kim, Cheol-Hee ; Kim, Hyo-Sung ; Syed, Abdul Qadir ; Hwang, Bo-Yong ; Lee, Hyeon-Yong ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 625~629
This study was carried out to investigate the anti-wrinkle effects of peptides derived from collagens isolated from Asterias amurensis, which was collected in the East Sea. The molecular weights of the peptides were between 10-50 kDa, as determined through sephadek G-75 gel. The cytotoxicities against CCD-986sk cells and HEL-299 cells were measured using the MTT assay. The cytotoxicity of all the fractions(F1: Fraction No. 4-13, 116 kDa; F2: Fraction No. 25-30, 100 kDa; F3: Fraction No. 45-55, 58 kDa; F4: Fraction No. 59-63, 43 kDa; F5: Fraction No. 79-90, 24 kDa) was less than 25%, by the addition of 1.0 mg/mL. These peptides did not show any adverse effects on human skin cells. In the presence of F1 at 1.0 mg/mL, matrix metalloproteinase-1 (MMP-1) expression of UVA-induced human normal fibroblasts was reduced to 34.8%. Overall, the results seem to suggest that peptides of approximately 20 kDa have superior anti-wrinkle effects.
Study on the Quality Improvement of Acidic Citrus Juices, Citrus natsudaidai and Citrus grandis, by Bipolar Membrane Electrodialysis
Yang, Min-Ho ; Kang, Yeung-Joo ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 630~636
Acidic citrus juices obtained from C. natsudaidai and C. grandis were electrodialyzed with bipolar and organic acid selective membrane (ion exchange membrane) cartridges. The pH levels of the acidic citrus juices gradually increased to 14.5% (C. grandis) and 25.2% (C. natsudaidai) by electrodialysis with the bipolar membranes, while levels remained consistent when organic acid selective membranes were applied. The total acidity levels decreased more with the organic selective membrane than with the bipolar membrane. Conductivity rose with the bipolar membranes while the value continued to fall rapidly with the organic selective membranes. Sugar and flavonoid contents remained relatively unchanged, without any significant differences before and after electrodialysis with each membrane. Also, ion contents were almost unchanged with the bipolar membranes and the electrolyte,
, as compared to rapid changes in sodium and potassium levels with the organic selective membranes and the electrolyte,
. In summary, the use of bipolar membranes provided juice with better sensory quality than that of the organic acid selective membranes.
Physiochemical Characteristics of Corn Starch during the Alkali Gelatinization
Cho, Seok-Cheol ; Shin, Hae-Hun ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 637~643
In this report, we discussed the physiochemical characteristics of corn starch during the alkali gelatinization process. Here, solubility and the amounts of eluted polysaccharides and amyloses increased in proportion to the amount of alkali added. The X-ray diffraction patterns and DSC thermogram showed that in the early stage of alkali gelatinization, crystallinity of the starch granules was disrupted as compared with heat gelatinization. This resulted in the eluted amylose content, while granule sizes were hardly changed in the alkali treated corn starch. The endotherm peak in the DSC thermogram shifted toward a higher temperature region as the degree of gelatinization increased, suggesting that the retained starch granules were more compactly crystallized during alkali gelatinization than during the heat process. Thus, we concluded that during the alkali gelatinization of corn starch, the disruption of weak particles would occur first, before swelling of the granules.
Effects of Storage Conditions on Qualities of Buttercup Squash (Kabocha)
Han, Jin-Suk ; Chung, Moon-Cheol ; Kim, Sung-Ran ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 644~651
To establish the optimum conditions for storing buttercup squash, we examined the effectiveness of several storage methods and the quality of the squash under various storage conditions, including temperature (12 and
) and relative humidity (20, 40, 60, and 80%). The spoiling rate of the squash was affected more by the storage temperature than the relative humidity, and the squash stored at
started to be deteriorated after 20 days of storage. At
, soluble solid content gradually increased until 20 days of storage, and then it tended to decrease. The L-value had a tendency to increase with days of storage, and the a- and b-value also increased after 40 days. In addition, the color changes were great when the squash was stored at high temperature and high relative humidity. The total pectin content increased until 20 days at
, and then it decreased, but less change was observed in the squash stored at
. Overall, the results showed that storage at
after field curing resulted in excessive weight loss, color loss and poor eating quality, as well as a high level of decay (approximately 70%) after 40 days. However, the squash stored at
and 60% RH (relative humidity) showed less degreening and had a reduced level of decay, below 10%.
Rheological Properties of Bread Dough Added with Enteromorpha intenstinalis
Lim, Eun-Jeong ; Lee, Yoo-Hyun ; Huh, Chai-Ok ; Kwon, Soon-Hyung ; Kim, Ji-Young ; Han, Yong-Bong ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 652~657
This study was performed to evaluate the physicochemical and quality characteristics of bread with Enteromorpha intenstinalis added. In order to compare the physical and organoleptic properties, 1 to 4% of E. intenstinalis powder was mixed with the flour. Among the physical characteristics of the dough, the absorption ratio in the farinogram and the degree of attenuation increased with increasing amounts of E. intenstinalis powder, whereas the development time, dough stability, the degree of extension, the degree of resistance, and R/E became reduced. In the amylogram, there was no difference in the gelatinization starting temperature among the samples, but the maximum viscosity gradually increased according to increasing amounts of E. intenstinalis powder. Also, a sensory evaluation was carried out in terms of acceptability (color, flavor, moistness, tenderness, mouth feel, and overall acceptability). Taken together, the 2% treatment showed the highest evaluation values, as compared to the other treatments.
Flavor Entrapment Effect of Porous Starch and Sensory Characteristic of Boiled Instant Noodles Using Flavor-entrapped Porous Starch
Kim, Hae-Yeun ; Lee, Gyu-Hee ; Kang, Hyun-Ah ; Shin, Myung-Gon ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 658~662
In this study, wild sesame leaf aromas (WSLA) were extracted and the extracted aromas were entrapped in porous potato starch micelles. The entrapped aromas did not evaporate, even by heated water treatments, and remained until a physical treatment such as chewing. Thus, the entrapped WSLA starch was used to make precooked instant noodles in order to mask or/and reduce an unpleasant raw flour flavor. The efficiencies of the flavor entrapment were analyzed using gas-chromatography equipped with solid phase micro-extraction (SPME), as well as by sensory evaluation. The highest yield of the porous potato starch was shown as 82.4% at an inlet temperature (IT) of
, an exhaust temperature (ET) of
, and a feeding rate (FR) of 40 mL/min. In the porous starch made by IT at
, ET at
, and FR at 50 mL/min, the entrapment efficiency was 68% by GC analysis; this starch also had the highest WSLA and consumer acceptability, but the lowest raw flour flavor, according to the sensory evaluation results.
Microbiological, Nutritional, and Rheological Quality Changes in Frozen Potatoes during Storage
Ha, Ji-Hyoung ; Ha, Sang-Do ; Kang, Yoon-Seok ; Hong, Kwon-Pyo ; Bae, Dong-Ho ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 663~668
This study evaluated the microbial, nutritional, and rheological changes in potatoes, during storage at room, low, and freezing temperatures for 6 months. No significant changes in total aerobic plate counts were observed for any of the samples in the assessment of microbiological quality changes. For the 4 types of frozen potatoes, yeasts and molds were not found until 24 weeks. The sugar contents of the potatoes stored at room and low temperature (
) increased during the first 4 weeks of storage, but then decreased rapidly thereafter; while those in the frozen potatoes did not change significantly throughout the 48 weeks. The vitamin C, B1, and B2 contents of the potatoes stored at room and low temperature had decreased significantly after 4 weeks of storage, however, the levels in the frozen potatoes did not change rapidly. The weight, volume, and hardness of the frozen potatoes changed much less as compared to the potatoes stored at room and low temperature over the 48 weeks of storage. Finally, the cohesiveness of all the samples, except for the frozen mashed potatoes, did not change during storage.
Enzymatic Assessment of
Purified from Cumin (Cuminum cymium L.) Seed for Anti-periodontitis
Ryu, Il-Hwan ; Kang, Eun-Ju ; Lee, Kap-Sang ; Park, Chung-Soon ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 669~675
The present study was conducted to explore the anti-inflammatory action of
(HPS) purified from Cumin (Cuminum cymium L.) seed against periodontitis. From the study in which human leukocyte was employed to detect the inhibiting effects of 5-lipokygenase and cyclooxygenase, enzymes generating carriers of infection like
and PGs, as well as of collagenase and elastase, organ-destroying enzymes, following conclusions could be drawn: HPS was found to inhibit leukotrien
biosynthesis by stimulating more than 97% of human polymorphonuclear leukocyte (PMNL) with addition of
was set at
. Ninety-two percent of enzyme activation turned out to be inhibited when
was added in a test to prove inhibiting effects of HPS against activation of PMNL 5-lipoxygenase from homogeneous humans and purified 5-lipoxygenase on the market. Besides,
for enzyme activation was valued at
, while the value of
for purified 5-lipoxygenase was
values of COX-activated leukocyte and purified collagenase were
, respectively. Moreover, the value of
for activation of leukocyte collagenase was
, whereas that for purified collagenase was
. In case of leukocyte elastase, addition of
inhibited its activation by 66%. In case of purified one, however, activation of enzyme was inhibited by 25% with addition of
. Furthermore, the
value for activation of leukocyte elastase was revealed to be
. From the virulence test with human gingiva cell, it was shown that, on the second day of cultivation, 47.83% of the cell had been activated when HPS was added by
. Even the addition of HPS by
featured 68.53% of cell activation, suggesting relatively strong toxicity of the substance against gingiva cell.
Changes in Quality Characteristics of Cheonggukjang Made with Germinated Soybean
Kim, Mi-Hyang ; Kang, Woo-Won ; Lee, Nan-Hee ; Kwon, Dae-Jun ; Kwon, O-Jun ; Chung, Yeon-Shin ; Hwang, Young-Hyun ; Choi, Ung-Kyu ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 676~680
This research was conducted to investigate the changes in quality characteristics of cheonggukjang made with 24-hr germinated soybeans during fermentation. Our study confirmed that the pH of the 24-hr germinated soybeans was 6.7, and the value increased as fermentation progressed. The amount of viscous substances in the cheonggukjang produced with the 24-hr germinated soybeans constantly increased to 5.89% at 36 hr of fermentation, and then remained unchanged. Free sugars (raffinose, sucrose, glucose, and fructose) rapidly decreased with the fermentation process. The levels of free amino acids in the 24-hr germinated agakong and the 48-hr fermented cheonggukjang were 391.0 and 10,994.8 mg%, respectively. Glutamic acid content was highest, followed by aspartic acid, lysine, leucine, and proline. The ratio of glutamic acid to total free amino acids at 48-hr of fermentation was 18.0%. Finally, it was confirmed that the sensory evaluation score of the 24-36 hr fermented cheonggukjang, made with the 24-hr germinated soybeans, was superior to that of the 24 and 48-hr fermented cheonggukjang.
Characteristics and Immunomodulating Activity of Lactic Acid Bacteria for the Potential Probiotics
Seo, Jae-Hoon ; Lee, Ho ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 681~687
This study was designed to examine the suitable characteristics of potential probiotic bacteria. Possible probiotic bacteria, including Lactobacillus acidophilus DDS-1, Lb. acidophilus B-3208, Bifidobacterium bifidum KCTC 3357, Lb. plantarum, Leuconostoc mesenteroides ssp. mesenteroides ATCC 8293, and Lactococcus lactis ssp. lactis ATCC 7962 were selected. We then measured their acid and bile tolerances, adhesion properties in the gastrointestinal tract, antimicrobial activity against pathogenic bacteria, and immunomodulation activity. The acid tolerances of Lb. acidophilus DDS-1, Lb. acidophilus B-3208, Lb. plantarum, and Leu. mesenteroides ssp. mesenteroides ATCC 8293, in PBS (pH 2.5) for 2 hr, were high enough that 50% of the inocula survived. The bile tolerances of all bacteria, except Lc. lactis ssp. lactis ATCC 7962, were also observed at a 3% oxgall concentration in MRS broth. The results of the adhesion property assay showed that the total binding affinities of Lb. acidophilus DDS-1, Lb. acidophilus B-3208, and B. bifidum were about three times higher than those of the other bacteria. In testing their antimicrobial activities against pathogens, Lb. acidophilus B-3208, B. bifidum KCTC 3357, and Lb. plantarum inhibited the growth of pathogenic bacteria. For their immunomodulation activity, the cell wall fractions from Lb. acidophilus DDS-1 and Lb. acidophilus B-3208 showed the highest bone marrow cell proliferation activities. However, the cell wall fractions of Lb. acidophilus DDS-1 and B. bifidum, and the cytosol fraction of Lc. lactis ssp. lactis ATCC 7962 showed higher macrophage stimulation activities than those of the other bacteria. Since Lb. acidophilus DDS-1 and Lb. acidophilus B-3208 satisfy the requirements for probiotics, they can be considered suitable probiotic bacteria.
Protective Effects of Water Extracts Composed of Adenophora triphylla var. japonica Hara on the Acetaminophen-induced Hepatotoxicity
Gum, Sang-Il ; Lee, Dong-Ung ; Cho, Min-Kyung ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 688~693
The hepatoprotective effects of water extracts composed of Adenophora triphylla var japonica Hara (ATJH) on acetaminophen (APAP)-induced hepatotoxicity were investigated in vivo and in vivo. The effects of ATJH on liver toxicity induced by APAP were assessed by blood biochemical and histopathological analyses. APAP treatment (350 mg/kg) caused severe liver injury in mice as indicated by their significantly elevated plasma aspartate aminotransferase (AST) and alanine aminotransferase (ALT) levels. Pretreatment with ATJH for 3 or 7 days attenuated the increases in ALT and AST when challenged with APAP. The reductions in viability caused by high dose of APAP (450 mg/kg) in vivo were reversed by pretreatment with ATJH. These protective effects of ATJH against APAP-induced toxicity were consistent with the results from the histopathological examinations. We next examined the effects of ATJH on the gene expression of glutathione S-transferases (GSTs) that detoxify the metabolic intermediates of APAP in H4IIE cells. The hepatic GST protein levels [
class (GSTA2, GSTA3/5)] were significantly elevated in a dose-dependent manner by ATJH treatment. In summary, ATJH is effective at protecting against APAP-induced hepatotoxicity by GST induction, implying that ATJH should be considered a potential chemopreventive agent.
Antioxidant and Cell Proliferation Effects of Acanthopanax senticosus for Extract in Human Osteoblast-like MG-63 Cell Line
Lim, So-Young ; Leem, Jae-Yoon ; Lee, Choong-Soo ; Jang, Yu-Jung ; Park, Jeong-Woo ; Yoon, Sun ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 694~700
Acanthopanax senticosus is a common Asian herb also known as "Siberian Ginseng". It is often used as a traditional herbal medicine for reducing damage in the liver, kidney, bone and muscle. In the present study we investigated the ferric reducing/antioxidant power and total phenolic contents of the ethanol-/water-extracts obtained from the stems and leaves of Acanthopanax senticosus. Osteoblast cellular proliferation was evaluated using the MTT and alkaline phosphatase activity assays in the human osteoblast-like MG-63 cell line. Acanthopanax senticosus extracts exerted remarkable ferric reducing/antioxidant power and contained high amount of phenolics. Among the extracts the stem-/ethanol-extract showed the highest antioxidant activity and total phenol content. Interestingly a highly positive correlation was found between antioxidant activity and total phenol content (p < 0.01). Proliferation of MG-63 osteoblast cells was highest in the stem-/ethanol-extract and alkaline phosphatase activity significantly increased in the water-extract of the stems (p < 0.05). These findings suggest that Acanthopanax senticosus extracts have antioxidant activity for preventing oxidative stress-related diseases and may have beneficial effects on bone health through the proliferation of osteoblast cells.
In vitro Anti-diabetic Effects of Crude Extracts of Platycodi Radix
Ko, Byoung-Seob ; Kwon, Dae-Young ; Hong, Sang-Mee ; Park, Sun-Min ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 701~707
Anti-diabetic effect of Platycodi radix (PR) extract fractions was determined if vitro by investigating insulin-like action, insulin sensitizing action, glucose-stimulated insulin secretion, gene expression related to
function and mass, and
suppressing action. Insulin-like activity was not promoted by the treatment of PR methanol factions in 373-L1 fibroblast. However, treatment with 0, 20 and 100% PR methanol fractions along with 1 ng/mL insulin increased insulin-stimulated glucose uptake in 373-L1 adipocytes. In addition, the treatment of 0% and 100% methanol fractions along with differentiation inducers significantly increased the differentiation of 373-L1 fibroblasts to adipocytes. These fractions may contain insulin sensitizer. The 20%, 80% and 100% methanol fractions enhanced glucose-stimulated insulin secretion in Min6 cells, insulin secreting cell line. This was related to the mechanism to promote glucose sensing and
proliferation, which was regulated by the induction of IRS-2, glucokinase and PDX-1 genes. As expected, 20, 80 and 100% methanol fractions increased mRNA levels of IRS-2, glucokinase and PDX-1 genes. However, PR fractions did not affect the
activity in vitro. These data suggested that PR extract fractions have anti-diabetic actions through improving insulin sensitization, glucose-stimulated insulin secretion, and
proliferation. Therefore, PR extracts can be beneficial for anti-diabetic treatment in lean diabetic patients.
Development of Biologically Active Compounds from Edible Plant Sources - XXV. Immunostimulating Effect of Edible Plant Extracts
Lyu, Ha-Na ; Park, Mi-Hyun ; Hong, Seong-Gil ; Lee, Dae-Young ; Han, Kyung-Min ; Yoo, Jong-Su ; Kim, Se-Young ; Rho, Young-Duk ; Baek, Nam-In ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 708~714
In this study, the 163 edible plants that are permitted as foods by the Korea Food and Drug Administration, were extracted in methanol. Following extration, their macrophage immunostimulating effects (MIE) were examined using a macrophage from BALB/C mice at four different concentrations of plant extract, such as
, in vivo. Forty-two samples significantly showed MIEs. Among them, 20 samples had increased MIEs at higher than 10%, as compared to the negative control group. Nineteen samples had increased MIEs at two of the plant extract concentrations, and 3 samples [Allium schoenoprasmum (chive), Aralia elata (fatsia), Capsosiphon fulvescens (seaweed fulvescens)] had increased MIEs at three of the concentration conditions. In particular, Dioscorea batatas (yam) showed MIEs at all concentrations, as well as slightly higher MIEs as compared to the positive control group. Therefore, Dioscorea batatas was evaluated to be an excellent MIE.
Monitoring of Butyltin Compounds in PVC Food Packaging - Determination of Butyltin Compounds in PVC Wrap and Gasket for Food Packaging by GC/MS
Sung, Jun-Hyun ; Yoon, Hae-Jung ; Choi, Hyun-Cheol ; Jeon, Dae-Hoon ; Eom, Mi-Ok ; Kim, Hyung-Il ; Park, Na-Young ; Lee, Eun-Joon ; Lee, Young-Ja ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 715~720
The levels of butyltin compounds in poly(vinyl chloride) (PVC) food packaging using gas chromatography/mass spectrometry (GC/MS) were monitored. The analytical method, involving the ethylation with sodium tetraethylborate, was found to be selective and sensitive for mono-n-butyltin (MBT), di-n-butyltin (DBT), and tri-n-butyltin (TBT), validated by a
limit of detection (LOD), an $R^2>0.999$ for linearity, and >90% of recovery, respectively. Finally, none of the commercial food wraps and gaskets showed detectable levels of butyltin compounds.
Tissue Concentration of Quercetin, Isoquercitrin and Hyperoside, and Lipid Profile Changes Following 8-Week Feeding of Angelica keiskei Powder in Rats
Choe, Kyu-Hong ; Choe, Sun-Nam ; Choo, Jong-Jae ; Lee, Jeong-Yeol ; Kim, Jong-Yeon ; Kim, Ju-Wan ; Choi, Ji-Sung ; Park, Ki-Seok ; Park, Kwan-Ha ;
Korean Journal of Food Science and Technology, volume 39, issue 6, 2007, Pages 721~724
In this study, we examined the effects of Angelica keiskei (AK) in rats, in order to evaluate tissue quercetin concentrations and serum lipid profile changes. Dried AK powder was added to a regular chow at a 5% level, and fed for 8 weeks to male rats. AK significantly lowered serum total cholesterol, low-density lipoprotein cholesterol, and very low-density lipoprotein cholesterol levels, while it increased high-density lipoprotein cholesterol levels. However, AK did not influence serum triglyceride levels. Two antioxidant flavonoids present in AK, quercetin and its glycoside isoquercitrin, were detected in the serum and liver of the rat. However, another quercetin glycoside, hyperoside, was not detected in either the serum or liver despite its presence in the diet. These results indicate that AK seems to alter serum lipid concentrations, possibly through the body's absorption of certain quercetin glycosides.