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Shin, Ji-Yon,Lee, Jung-Min,Shin, Heon-Sub,Park, Sang-Yong,Yang, Jung-Eun,KimCho, So-Mi,Yi, Tae-Hoo The Korean Society of Ginseng 2012 Journal of Ginseng Research Vol.36 No.1
The glioblastoma multiforme (GBM) is the most common malignant brain tumor in adults. Despite combination treatments of radiation and chemotherapy, the survival periods are very short. Therefore, this study was conducted to assess the potential of ginsenoside $F_2$ (F2) to treat GBM. In in vitro experiments with glioblastoma cells U373MG, F2 showed the cytotoxic effect with $IC_{50}$ of 50 ${\mu}g/mL$ through apoptosis, confirmed by DNA condensation and fragmentation. The cell population of cell cycle sub-G1 as indicative of apoptosis was also increased. In xenograft model in SD rats, F2 at dosage of 35 mg/kg weight was intravenously injected every two days. This reduced the tumor growth in magnetic resonance imaging images. The immunohistochemistry revealed that the anticancer activity might be mediated through inhibition of proliferation judged by Ki67 and apoptosis induced by activation of caspase-3 and -8. And the lowered expression of CD31 showed the reduction in blood vessel densities. The expression of matrix metalloproteinase-9 for invasion of cancer was also inhibited. The cell populations with cancer stem cell markers of CD133 and nestin were reduced. The results of this study suggested that F2 could be a new potential chemotherapeutic drug for GBM treatment by inhibiting the growth and invasion of cancer.
Anti-Cancer Effect of Ginsenoside F₂ against Glioblastoma Multiforme in Xenograft Model in SD Rats
Ji Yon Shin,Jung Min Lee,Heon Sub Shin,Sang Yong Park,Jung Eun Yang,Somi Kim Cho,Tae-Hoo Yi 고려인삼학회 2012 Journal of Ginseng Research Vol.36 No.1
The glioblastoma multiforme (GBM) is the most common malignant brain tumor in adults. Despite combination treatments of radiation and chemotherapy, the survival periods are very short. Therefore, this study was conducted to assess the potential of ginsenoside F₂ (F2) to treat GBM. In in vitro experiments with glioblastoma cells U373MG, F2 showed the cytotoxic effect with IC?? of 50 ㎍/mL through apoptosis, confi rmed by DNA condensation and fragmentation. The cell population of cell cycle sub-G1 as indicative of apoptosis was also increased. In xenograft model in SD rats, F2 at dosage of 35 ㎎/㎏ weight was intravenously injected every two days. This reduced the tumor growth in magnetic resonance imaging images. The immunohistochemistry revealed that the anticancer activity might be mediated through inhibition of proliferation judged by Ki67 and apoptosis induced by activation of caspase-3 and -8. And the lowered expression of CD31 showed the reduction in blood vessel densities. The expression of matrix metalloproteinase-9 for invasion of cancer was also inhibited. The cell populations with cancer stem cell markers of CD133 and nestin were reduced. The results of this study suggested that F2 could be a new potential chemotherapeutic drug for GBM treatment by inhibiting the growth and invasion of cancer.
Yi, Eun-Ji,Yang, Jung-Eun,Lee, Jung Min,Park, YongJin,Park, Sang-Yong,Shin, Heon-sub,Kook, MooChang,Yi, Tae-Hoo International Union of Microbiological Societies 2013 International journal of systematic and evolutiona Vol.63 No.9
<P>A Gram-reaction-positive, non-motile, non-spore-forming, catalase-negative, facultatively anaerobic, rod-shaped, β-glucosidase-producing lactic acid bacterium, designated strain THK-V8<SUP>T</SUP>, was isolated from the Korean fermented food, Kimchi, and its taxonomic position was investigated by using a polyphasic approach. Strain THK-V8<SUP>T</SUP> was able to grow at 4–40 °C (optimum, 30 °C) and pH 4.0–7.0 (optimum, pH 6.0). Strain THK-V8<SUP>T</SUP> had the ability to transform ginsenoside Rb<SUB>1</SUB> to Rd. On the basis of 16S rRNA gene sequence similarity data, strain THK-V8<SUP>T</SUP> was shown to belong to the genus <I>Lactobacillus</I>. Strain THK-V8<SUP>T</SUP> was related to <I>Lactobacillus koreensis</I> DCY50<SUP>T</SUP> (98.8 % sequence similarity), <I>Lactobacillus parabrevis</I> LMG 11984<SUP>T</SUP> (97.7 %), <I>Lactobacillus senmaizukei</I> L13<SUP>T</SUP> (97.5 %), <I>Lactobacillus hammesii</I> TMW1.1236<SUP>T</SUP> (97.3 %) and <I>Lactobacillus brevis</I> ATCC 14687<SUP>T</SUP> (97.2 %). Subsequently, sequence analysis of the RNA polymerase alpha subunit gene (<I>rpoA</I>) confirmed that strain THK-V8<SUP>T</SUP> showed a maximum <I>rpoA</I> gene sequence similarity value of 93 % with <I>Lactobacillus brevis</I> LMG 6906<SUP>T</SUP>. The G+C content of the genomic DNA was 47.8 mol%. The DNA–DNA hybridization values between strain THK-V8<SUP>T</SUP> and <I>Lactobacillus parabrevis</I> DCY50<SUP>T</SUP> and <I>Lactobacillus parabrevis</I> LMG 11984<SUP>T</SUP> were 46.1±4.9 % and 10.6±2.9 %, respectively. The major fatty acids were summed feature 7 (comprised of C<SUB>19 : 0</SUB> cyclo ω10<I>c</I>/19ω6), C<SUB>14 : 0</SUB>, C<SUB>16 : 0</SUB> and C<SUB>18 : 1</SUB>ω9<I>c</I>. The cell wall peptidoglycan was of the A4α <SMALL>l</SMALL>-Lys–<SMALL>d</SMALL>-Asp type. The phenotypic and molecular properties indicated that strain THK-V8<SUP>T</SUP> represents a novel species within the genus <I>Lactobacillus</I>, for which the name <I>Lactobacillus</I> <I>yonginensis</I> sp. nov. is proposed. The type strain is THK-V8<SUP>T</SUP> ( = KACC 16236<SUP>T</SUP> = JCM 18023<SUP>T</SUP>).</P>
<i>Chryseobacterium gwangjuense</i> sp. nov., isolated from soil
Park, Yong Jin,Son, Heung-Min,Lee, Eun-Hee,Kim, Ju Han,Mavlonov, Gafurjon T.,Choi, Ki Ju,Shin, Hun-Sub,Kook, MooChang,Yi, Tae-Hoo International Union of Microbiological Societies 2013 International journal of systematic and evolutiona Vol.63 No.12
<P>A Gram-stain-negative, strictly aerobic, non-motile, rod-shaped bacterial strain, THG-A18<SUP>T</SUP>, was isolated from soil of Gwangju province in South Korea. Strain THG-A18<SUP>T</SUP> grew optimally at 25–30 °C, at pH 7.0–8.0 and in the absence of NaCl. Strain THG-A18<SUP>T</SUP> displayed β-glucosidase activity, which enabled it to convert ginsenoside Rb<SUB>1</SUB> to Rd. According to 16S rRNA gene sequence analysis, strain THG-A18<SUP>T</SUP> was shown to belong to the genus <I>Chryseobacterium</I>. The closest phylogenetic neighbours were <I>Chryseobacterium ginsenosidimutans</I> THG 15<SUP>T</SUP> (97.9 % 16S rRNA gene sequence similariity), <I>C. defluvii</I> B2<SUP>T</SUP> (97.7 %), <I>C. daeguense</I> K105<SUP>T</SUP> (97.6 %), <I>C. taiwanense</I> BCRC 17412<SUP>T</SUP> (97.5 %), <I>C. indoltheticum</I> LMG 4025<SUP>T</SUP> (97.4 %), <I>C. gregarium</I> P 461/12<SUP>T</SUP> (97.4 %) and <I>C. lathyri</I> RBA2-6<SUP>T</SUP> (97.3 %), but DNA–DNA relatedness values between these strains and strain THG-A18<SUP>T</SUP> were below 41.9 %. The G+C content of the genomic DNA was 36.4 mol%. The major respiratory quinone (MK-6) and fatty acids [iso-C<SUB>15 : 0</SUB>, iso-C<SUB>17 : 0</SUB> 3-OH, summed feature 3 (comprising C<SUB>16 : 1</SUB>ω7<I>c</I> and/or C<SUB>16 : 1</SUB>ω6<I>c</I>) and summed feature 9 (comprising iso-C<SUB>17 : 1</SUB>ω9<I>c</I> and/or 10-methyl C<SUB>16 : 0</SUB>)] supported the affiliation of strain THG-A18<SUP>T</SUP> with the genus <I>Chryseobacterium</I>. The polar lipids of strain THG-A18<SUP>T</SUP> were phosphatidylethanolamine, four unidentified aminolipids and seven unidentified lipids. A number of physiological and biochemical tests allowed phenotypic differentiation of strain THG-A18<SUP>T</SUP> from recognized species of the genus <I>Chryseobacterium</I>. The name <I>Chryseobacterium gwangjuense</I> sp. nov. is proposed, with THG-A18<SUP>T</SUP> ( = KACC 16227<SUP>T</SUP> = LMG 26579<SUP>T</SUP>) as the type strain.</P>
연구논문 : 다중회귀모형을 이용한 벤츄리가 없는 충격기류식 여과집진장치 압력손실 예측
서정민 ( Jeong Min Suh ),박정호 ( Jeong Ho Park ),조재환 ( Jae Hwan Cho ),진경호 ( Kyung Ho Jin ),정문섭 ( Moon Sub Jung ),이병인 ( Pyong In Yi ),홍성철 ( Sung Chul Hong ),시바쿠마르최금찬 ( S Sivakumar ),최금찬 ( Kum Chan Choi ) 한국환경과학회 2014 한국환경과학회지 Vol.23 No.12
In this study, pressure drop was measured in the pulse jet bag filter without venturi on which 16 numbers of filter bags (Ø140 × 850 ℓ) are installed according to operation condition(filtration velocity, inlet dust concentration, pulse pressure, and pulse interval) using coke dust from steel mill. The obtained 180 pressure drop test data were used to predict pressure drop with multiple regression model so that pressure drop data can be used for effective operation condition and as basic data for economical design. The prediction results showed that when filtration velocity was increased by 1%, pressure drop was increased by 2.2% which indicated that filtration velocity among operation condition was attributed on the pressure drop the most. Pressure was dropped by 1.53% when pulse pressure was increased by 1% which also confirmed that pulse pressure was the major factor affecting on the pressure drop next to filtration velocity. Meanwhile, pressure drops were found increased by 0.3% and 0.37%, respectively when inlet dust concentration and pulse interval were increased by 1% implying that the effects of inlet dust concentration and pulse interval were less as compared with those changes of filtration velocity and pulse pressure. Therefore, the larger effect on the pressure drop the pulse jet bag filter was found in the order of filtration velocity(Vf), pulse pressure(Pp), inlet dust concentration(Ci), pulse interval(Pi). Also, the prediction result of filtration velocity, inlet dust concentration, pulse pressure, and pulse interval which showed the largest effect on the pressure drop indicated that stable operation can be executed with filtration velocity less than 1.5 m/min and inlet dust concentration less than 4 g/m3. However, it was regarded that pulse pressure and pulse interval need to be adjusted when inlet dust concentration is higher than 4 g/m3. When filtration velocity and pulse pressure were examined, operation was possible regardless of changes in pulse pressure if filtration velocity was at 1.5 m/min. If filtration velocity was increased to 2 m/min. operation would be possible only when pulse pressure was set at higher than 5.8 kgf/cm2. Also, the prediction result of pressure drop with filtration velocity and pulse interval showed that operation with pulse interval less than 50 sec. should be carried out under filtration velocity at 1.5 m/min. While, pulse interval should be set at lower than 11 sec. if filtration velocity was set at 2 m/min. Under the conditions of filtration velocity lower than 1 m/min and high pulse pressure higher than 7 kgf/cm2, though pressure drop would be less, in this case, economic feasibility would be low due to increased in installation and operation cost since scale of dust collection equipment becomes larger and life of filtration bag becomes shortened due to high pulse pressure.