Sclerotia of Grifola umbellata were cultivated by two methods such as burying and root inoculation methods. The sclerotia of G. umbellata produced by the burying method were $6.0{\sim}6.8{\times}3.4{\sim}4.6{\times}1.8{\sim}1.9cm$(Width$\times$Length$\times$Thickness) in size and $17.3{\sim}19.6g$ in weight, respectively. Their increase rate was $1.10{\times}1.12$ times. On the other hand, the sclerotia cultivated by the root inoculation method were $18.3{\sim}31.5{\times}12.5{\sim}26.4{\times}3.1{\sim}3.7cm(W{\times}L{\times}T)$ in size and $219.1{\sim}576.6g$ in weight, respectively. Their growth increment was $11.18{\sim}39.77$ times. The rhizomorphs of Armillaria mellea were developed with a high density under fallen leaves layer covering cultivation site, and distributed mainly between soil surface and soil depth of about 10 cm as well as colonized prominently on the inoculated wood logs. Fungal interaction between G. umbellata and A. mellea were observed mainly in the stage of white sclerotium of G. umbellata. The sclerotia of G. umbellata which were developed newly and harvested in the root inoculation method were twined with root hairs of host tree and rhizomorphs of A. mellea. The sclerotia of G. umbellata decomposing root hairs of host tree were confirmed through SEM examination. Physiochemical characteristics of soil in all cultivation sites had no significant differences. Soil pH were in the range of pH $3.98{\sim}4.40$. Organic matters were the range of $17.97{\sim}23.86%$ and moisture contents of soil were $12.00{\sim}18.20%$. Soil temperatures showed $12.9{\sim}13.8^{\circ}C$ in November and $22.0{\sim}23.9^{\circ}C$ in August, respectively. In conclusion, the root inoculation method seems to be a practical method for cultivating sclerotia of G. umbellata due to its many advantages such as simplicity of inoculation process, shortening of cultivation periods and facility of harvest.
The Journal of Korean Medicine Ophthalmology and Otolaryngology and Dermatology
/
v.19
no.1
/
pp.79-92
/
2006
This study was carried out to evaluate antioxidative, cytotoxic and chemosensitizing effects for anti-tumor activities of Naesosungma-tang (NST). The results were as follows ; 1. The oxidative effects were measured by DPPH radical scavenging activity. NST water extract was showed more effective than ethanol extract and also various solvent fractions from NST showed effective in the following order : butanol fraction > ethyl acetate fraction > hexane fraction > aqueous fraction. 2. NST water extract was showed cytotoxic effects on the human cancer cells Calu-6 cell and SNU-601 cell, but not on MCF-7 cell. 3. The viability of cells was measured in 4 kinds of solvent fractions from water extract of NST by MTT assay. The results were as followings : 1) On the NIH3T3 cell, $IC_{50}$ value was $200{\sim}300\;{\mu}g/m{\ell}$ in three fractions except aqueous fraction. 2) On the Caco-2 cell, effective only in the butanol fraction. 3) On the Calu-6 cell, most effective in hexane fraction($IC_{50}:80\;{\mu}g/m{\ell}$) and effective in ethyl acetate and butanol fraction($IC_{50}:100{\sim}120\;{\mu}g/m{\ell}$). 4) On the MCF-7 cell, $IC_{50}$ value was similar in three fractions except aqueous fraction. 5) On the SNU-601 cell, $IC_{50}$ value was within $100\;{\mu}g/m{\ell}$ in three fractions except aqueous fraction. 6) On the HCT-1l6 cell, $IC_{50}$ value was $150{\sim}200\;{\mu}g/m{\ell}$ in three fractions except aqueous fraction. 7) On the AML-2/WT cell, not effective in four kinds of solvent fractions. 4. In combined effects of NST and vincristine on AML-2/D100 cell, water and ethanol extracts of NST and hexane fraction of water extracts of NST more effectively inhibited proliferation of AML-2/D100 cell. These results Suggest that NST has antioxidative and cytotoxic effects against Caco-2, Calu-6, MCF-7, SNU-601, HCT116 and NIH3T3 cell especially Calu-6 and SNU-601 cell, and also chemosensitizing effects against AML-2/D100 cell in combined vincristine.
Journal of the Korean Society of Food Science and Nutrition
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v.41
no.3
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pp.383-389
/
2012
The objective of this study was to develop and standardize a preparation method for low-salt yacon jangachi using rice wine lees. The proximate composition of yacon was 81.08% (moisture), 0.77% (crude protein), 0.14% (crude lipid) and 0.70% (crude ash). In order to determine the preferred sodium concentrations of soaking solution and rice wine lees, we investigated the quality characteristics of yacon jangachi during storage for 50 days at $18^{\circ}C$. The salinity of yacon jangachi using rice wine lees with 2% and 4% salt increased with storage time, but the salinity did not rise above 3% during storage for 50 days. The salinity of rice wine lees with 4% salt decreased during storage time. a and b color values along with sheared force of yacon jangachi increased as storage time increased, but L color value was reversed. In the sensory evaluation, the color preference for yacon jangachi increased during storage time, and the taste preference was highest at day 30. The flavor preference decreased during storage time, but the texture preference was reversed. In the sensory evaluation of overall preference, yacon jangachi using rice wine lees with 0% salt decreased at day 30, whereas yacon jangachi using rice wine lees with 2% and 4% salt increased during storage time. In conclusion, the salinity of yacon jangachi stored for 50 days with 4% salt did not rise above 3%, and softening was not observed.
Kim, Ji-Sook;Shim, Hyung-Jin;Kim, Hong-Jin;Choi, Kyung-Hee;Kim, Jung-Woong;Kwak, Byung-Kook
Biomedical Science Letters
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v.13
no.3
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pp.207-212
/
2007
The purpose of this preliminary study is to improve the efficiency of gene transfer of nonviral plasmid DNA by in vivo electroporation in ischemic hindlimb muscle, tibialis anterior. Hindlimb ischemic model was aseptically made by excision of left femoral artery. Each $50\;{\mu}g$ of pEGFP-C1 and pGL3-control in $100\;{\mu}l$ 0.9% NaCl was injected in tibialis anterior muscle. In vivo electroporation was applied on the same site with 10 mm-distance 2 needle array electrodes and ECM830. In 3 groups of normal rat with different electric field strength 0, 200 and 800 V/cm, the expression of pEGFP-C1 was comparatively evaluated. In 8 groups of normal rats, the expression of pGL3-control was evaluated in 0, 40, 50, 80, 100, 150, 200 and 300 V/cm of electric field strength. In 5 groups of ischemic models, the expression of pGL3-control was analyzed on 0, 4, 7, 10 and 14 days elapsed after making ischemic models. In 9 groups of ischemic rats, the expression of pGL3-control was analyzed in the electric field strength 0, 60, 70, 80, 100, 150, 200, 250 and 300 V/cm. GFP expressions in normal tibialis anterior were high in the extent and degree in order of electric field strength of 200, 800 and 0 V/cm. Luciferase value was highest in $50{\sim}100\;V/cm$ electric field strength. In the case of ischemic models, luciferase expression was significantly increasing in the order elapsed time after making the model. The degree of luciferase expression was higher in cases of application of in vivo electroporation than in that of non-application and was highest in $100{\sim}150\;V/cm$. In conclusion, in vivo electroporation is effective in transfer and expression of plasmid DNA in normal and ischemic tibialis anterior of rat.
Transactions of the Korean Society of Mechanical Engineers A
/
v.35
no.10
/
pp.1329-1335
/
2011
On the basis of detailed 3D finite-element (FE) limit analyses, the plastic limit load solutions for pipes with slanted circumferential through-wall cracks (TWCs) subjected to axial tension, global bending, and internal pressure are reported. The FE model and analysis procedure employed in the present numerical study were validated by comparing the present FE results with existing solutions for plastic limit loads of pipes with idealized TWCs. For the quantification of the effect of slanted crack on plastic limit load, slant correction factors for calculating the plastic limit loads of pipes with slanted TWCs from pipes with idealized TWCs are newly proposed from extensive 3D FE calculations. These slant-correction factors are presented in tabulated form for practical ranges of geometry and for each set of loading conditions.
Nam, Da-Eun;Kim, Ok Kyung;Shim, Tae Jin;Kim, Ji Hoon;Lee, Jeongmin
Journal of the Korean Society of Food Science and Nutrition
/
v.43
no.5
/
pp.631-640
/
2014
The inhibitory effects of Boswellia serrata (BW) extracts on degenerative osteoarthritis were investigated in primary-cultured rat cartilage cells and a monosodium-iodoacetate (MIA)-induced osteoarthritis rat model. To identify the protective effects of BW extract against $H_2O_2$ ($800{\mu}M$, 2 hr) in vitro, cell survival was measured by MTT assay. Cell survival after $H_2O_2$ treatment was elevated by BW extract at a concentration of $20{\mu}g/mL$. In addition, BW extract treatment significantly reduced and normalized the productions of pro-inflammatory factors, nuclear transcription factor ${\kappa}B$, cyclooxygenase-2, tumor necrosis factor-${\alpha}$, and interleukin-6 at a concentration of $20{\mu}g/mL$. Treatment of chondrocytes with BW extract significantly reduced 5-lipoxygenase activity and production of prostaglandin E2, especially at a concentration of $10{\sim}20{\mu}g/mL$. For the in vivo animal study, osteoarthritis was induced by intra-articular injection of MIA into knee joints of rats. Consumption of a diet containing BW extract (100 and 200 mg/kg) for 35 days significantly inhibited the development and severity of osteoarthritis in rats. To determine the genetic expression of arthritic factors in articular cartilage, real-time PCR was applied to measure matrix metalloproteinases (MMP-3, MMP-9, and MMP-13), collagen type I, collagen type II, and aggrecan, and BW extract had protective effects at a concentration of 200 mg/kg. In conclusion, BW extract was able to inhibit articular cartilage degeneration by preventing extracellular matrix degradation and chondrocyte injury. One can consider that BW extract may be a potential therapeutic treatment for degenerative osteoarthritis.
Each ethnic group has different cultural backgrounds and each culture has developed with its own traditions. The interaction between different cultures is getting more active through acculturation and cultural contacts. The purpose of this study was to compare domestic living of Korean immigrants with Australians in the form of a Cross-Cultural study. For this, usage of domestic space and seating style of 52 Korean households and 53 Australian households in Melbourne were analyzed. Ethnographic research with questionnaire was used. The results of the research were as follows. 1. The most popular type of Living-Dining-Kitchen arrangement was L+ K. D for Koreans and L. D . K for Australians. 2. A laundry room was indispensable for both and they all wanted to do ironing in there as well as dry. Both were satisfied with the type which toilet was separated from the bathroom Drain hole on the floor of the bathroom was not indispensable for most Koreans and Australians. 3. Koreans and Australians were doing various activities in living area and both were getting together around kitchen(dining) area. The particular thing of Koreans was that they were using the main bedroom with multiple purpose. 4. The seating style of Koreans and Australians belong to chair-seating style generally. But Koreans were using floor seating style in making bed for the guest and making Kimchi. Koreans and Australians were using mixed style of floor seating and chair-seating in relaxing time with watching TV, treating guest or so. 5. Koreans were not satisfied with using carpet cause of dust but Australians were satisfied with the carpet cause of warmness. 6. Most Koreans and Australians were take off shoes inside of the house. Koreans were organize shoes around the front door of the house usually and Australians were organize shoes in bedroom usually. 7. The most popular heating system was ducted heating for both. The level of satisfaction about ducted heating was low for Koreans because they though that it could contaminate air. Australians were satisfied with ducted heating because they though that this one was fit on the weather of this area. 8. Living room was the most important one for Koreans and Australians and they also thought it should be decorated well for entertaining guests. Most Koreans were estimate that the brightness of the light of the house was not enough but it was estimated to moderate for Australians on the contrary.
We identified volatile organic compounds in Korean Allium species. Volatile organic components in three Korean Allium species, dried garlic, dried onion, and dried Welsh onion, were extracted using a simultaneous distillation and extraction (SDE) method and identified by GC/MS analysis. The numbers of volatile compounds were 48, 32, and 33 in the three species, respectively. In dried onion, the major compounds were dipropyl trisulfide, methyl propyl trisulfide, and propanethiol. (Z), (E)-propenyl propyl trisulfide, methyl propyl trisulfide, and dipropyl trisulfide were detected at high levels in Welsh onion. In dried garlic, presence of the allyl group identified characteristic volatile organosulfur compounds including diallyl disulfide and diallyl trisulfide. Qualitative and quantitative analysis of volatile compounds in three Korean Allium species showed that sulfur-containing compounds were dominant, and allyl groups derived from (+)-S-(2-propenyl)-L-cysteine sulfoxide (ALLYL CSO, alliin) were more abundant in dried garlic, than in other materials.
Shim, Sang Wan;Kim, Hyuk Jin;Park, Jin Young;Bae, Tae Min;Min, Jeong Ho;Lee, Jin Su;Kim, Sung Joo;Hwang, Yong Soo
Korean Journal of Agricultural Science
/
v.45
no.1
/
pp.19-27
/
2018
To study the effect of natural anti-microbial chemicals on the growth and quality of chili peppers, chitosan ($100mg/L^{-1}$), stevia ($250mg/L^{-1}$), and the mixture of both chemicals at the same concentration were sprayed after planting at 1-week interval throughout the experimental period. Plant height was measured twice after the $3^{rd}$ and $4^{th}$ applications. Plant height was numerically reduced in all chemical treatments compared to that of untreated control; however, there was no statistical difference between treatments. The fruit quality was examined at commercial maturity, and only minor differences were found in fruit color, length, and dry matter content between the treatments. Although a statistical difference was not present for soluble sugars levels, total phenolics, and capsaicin contents, yield in all chemical treatments significantly increased compared to untreated control. The effect on yield increase was greater at the late harvest season regardless of treatments. Total yield of 4 harvests was higher for the chitosan treatment than other treatments. During the experiment, the entire experimental field was waterlogged for 1 day due to sudden heavy rainfall, which resulted in the occurrence of bacterial browning disease in all treatments. The rate of disease occurrence and the degree of severity, however, were much lower in the chitosan treatment. In conclusion, the potential of chitosan as an alternative antimicrobial agent was confirmed in chili peppers in this study. Further research is required on stevia as an alternative chemical for disease control in chili peppers.
We have shown that myosin light chain kinase (MLCK) was required for the off-contraction in response to the electrical field stimulation (EFS) of feline esophageal smooth muscle. In this study, we investigated whether protein kinase C (PKC) may require the on-contraction in response to EFS using feline esophageal smooth muscle. The contractions were recorded using an isometric force transducer. On-contraction occurred in the presence of $N^G$-nitro-L-arginine methyl ester (L-NAME), suggesting that nitric oxide acts as an inhibitory mediator in smooth muscle. The excitatory composition of both contractions was cholinergic dependent which was blocked by tetrodotoxin or atropine. The on-contraction was abolished in $Ca^{2+}$-free buffer but reappeared in normal $Ca^{2+}$-containing buffer indicating that the contraction was $Ca^{2+}$ dependent. 4-aminopyridine (4-AP), voltage-dependent $K^+$ channel blocker, significantly enhanced on-contraction. Aluminum fluoride (a G-protein activator) increased on-contraction. Pertussis toxin (a $G_i$ inactivator) and C3 exoenzyme (a rhoA inactivator) significantly decreased on-contraction suggesting that Gi or rhoA protein may be related with $Ca^{2+}$ and $K^+$ channel. ML-9, a MLCK inhibitor, significantly inhibited on-contraction, and chelerythrine (PKC inhibitor) affected on the contraction. These results suggest that endogenous cholinergic contractions activated directly by low-frequency EFS may be mediated by $Ca^{2+}$, and G proteins, such as Gi and rhoA, which resulted in the activation of MLCK, and PKC to produce the contraction in feline distal esophageal smooth muscle.
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