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집토끼 동방결절의 활동전압에 미치는 Vanadate의 효과
조용문,방효원,엄대용,이상돈 중앙대학교 의과대학 의과학연구소 1984 中央醫大誌 Vol.9 No.3
In order to investigate the electrphysiological effect of vanadate, a potent inhibitor of Na^+-K^+ pump, on the cardiac muscle, the alteration of transmembrane potential as influenced by the drug was measured in rabbit SA rodes in vitro by means of KCI glass intracellular microelectrodes. The followings were results of findings: 1. The rate of spontaneous firing was decreased in the presence of vanadate and the maximum inhibition which was about 50% of contral level was obtained at drug concentrations of 10^-3 M or higher. 2. The maximum diastolic potential(M.D.P.) was depressed by vanadate in a dose-dependent manner and the maximum inhibitory effect was obtained at the drug concentration of 10^-3 M. However the peripheral pacemaker cells were more resistant to the drug effect than the central pacemaker cells at lower concentrations of the drug. 3. In both central and perepheral pacemaker cells, vanadate had no effect on the M.D.P. in concentrations up to 5×10^-4 M. However on at 5×10^-2 M, the drug depressed the M.D.P. in the peripheral cells. 4. Changes of the action potential induced by vanadate were qualitatively similar to those occuring when the calcium concentration of the bathing medium was raised to 4mM. These results may be interpreted as that vanadate increases the rate of Ca^++ influx info the cell in S-A nodes.
RAPD(Random Amplified Polymorphic DNA)법을 이용한 한약재의 판별 연구
김대원,김도균,안선경,조동욱 한국한의학연구원 1997 한국한의학연구원논문집 Vol.3 No.1
Conventionally, identification and classification methods of natural products include the morphological survey and assay of chemical disposition. Using these methods, however, is not satisfying for the precise identification of natural products because they are often variable in the compositions, genomic DNA analysis such as RAPD, RFLP and Amp-FLP can be adopted for this purpose. In this study, various ginsengs and bear gall bladder were tested for the development of genetic identification and classification method. Varieties of ginsengs such as, P. ginseng, P. quinquefolium, P. japonicus and P. notohinseng, were genetically analyzed by RAPD. Also, DNA isolated form Bear blood and gall bladder, Ursus thibetanus, Ursus americanus and Ursus arctors, were analyzed by the same method. The results demonstrated that the identification and classification of bear gall bladder and various ginsengs were possible by RAPD analysis. Therefore, this method was thought to be used as a additional method for the identification of other natural products.
Occurrence of Clubroot in Cruciferous Vegetable Crops and Races of the Pathogen in Korea
Cho, Weon-Dae,Kim, Wan gyu,Kenji Takahashi The Korean Society of Plant Pathology 2003 Plant Pathology Journal Vol.19 No.1
Cruciferous vegetable crops grown in several locations in Korea were surveyed from 1996 to 2000. Clubroot severely occurred up to a maximum of 100% in Chinese cabbage fields in 15 out of 42 locations, and in cabbage fields in 5 out of 13 locations surveyed. The disease also severely occurred up to a maximum of 40% in radish fields in 6 out of 35 locations, and up to a maximum of 40% and 100% in turnip and brown mustard fields in one each out of the few locations surveyed, respectively. The disease occurred less than l% in one kale field in one out of two locations surveyed. A total of 268 isolates of Plasmodiophora brassicae was obtained from six cruciferous vegetable crops. The isolates were classified into 13 races based on their pathogenicity to the differential varieties of cabbage and rutabaga. There were 13 races found in isolates from Chinese cabbage, while 6 races each were found in isolates from cabbage and radish. There were five and three races found in turnip and brown mustard isolates, respectively. One isolate from kale was identified as race 8. Race 8 was the most frequently isolated from five cruciferous vegetable crops, except brown mustard. Races 3 and 14 were isolated only from Chinese cabbage.
도시재생활성화를 위한 소규모 정비사업의 정책적 지원요소에 관한 연구
조대원 ( Cho Dae Weon ),이재윤 ( Lee Jae Yun ) 한국도시재생학회 2015 도시재생 Vol.1 No.1
This paper aims to find a way to study the policy implication for small maintenance project. This paper would be searched domestic projects several Seoul city leading project cases. By those several studies referred at questionnaires for survey answered by professional groups were drawn, and five sectoral experts carried out FGI. Besides it, specialists related urban regeneration project also answered the survey for this dissertation. At the conclusion, legislation issues - methods of urban regeneration, preserving way for regional properties, developing a model for community involvement, streamlining administrative procedure, other hands - on factors systematizing and collecting way of residents' opinion, way of supporting redevelopment promotion association's operating expenses - are suggested.
Weon Taek Seo,Woo Jin Lim,Eun Jin Kim,Han Dae Yun,Young Han Lee,Kye Man Cho 한국응용생명화학회 2010 Journal of Applied Biological Chemistry (J. Appl. Vol.53 No.4
Endophytic bacteria have several ecological roles and can be used as biocontrol agents and also participate in antibiosis interactions. The diversity of endophytic bacteria associated with young radish (YR, yeulmu, Raphanus sativus L.) leaves and roots fro
Dae Sik Kim,Byung Weon Kim,Sung Jun Cho 대한의생명과학회 2009 Biomedical Science Letters Vol.15 No.1
The prevalence of patent foramen ovale (PFO) in healthy persons was estimated as about 10~25% and was up to 40% in patients with stroke. Transesophageal echocardiography (TEE) was considered to be the most sensitive method to detect PFO and was used as the gold standard. Transcranial doppler sonography (TCD) of the middle cerebral artery (MCA) during a contrast (saline bubble) injection has recently been proposed as an alternative detecting method for PFO. In this study, we would like to know the difference between TCD value and TEE value in subjects with cryptogenic ischemic stroke. We performed TCD and TEE tests to detect PFO on 64 patients (30 women and 34 men, mean age was 59.4 years) with cryptogenic ischemic stroke. PFO prevalence through TCD was 45.3% (29 of 64 patients) and the prevalence through TEE was 34.4% (22 of 64 patients). There was no statistical significance between PFO test and TCD test (P=0.206). But TCD had a sensitivity of 90.9% (20 of 22 patients), specificity of 78.6% (33 of 42 patients), positive predictive value of 69.0% (20 of 29 patients), and negative predictive value of 94.3% (33 of 35 patients). We concluded that TCD was a highly sensitive method for detecting a right-left shunt. Therefore, the non-invasive TCD test is a method more effective than the anti-invasive TEE test in the cost and evaluation of the existence or nonexistence of right to left shunt in addition to the screening method of the cerebrovascular disorder. Considering these points, TCD test could be recommended for patients with cryptogenic ischemic stroke as a useful and convenient method for screening of the existence or nonexistence of a right to left shunt caused by PFO.
( Weon Taek Seo ),( Woo Jin Lim ),( Eun Jin Kim ),( Han Dae Yun ),( Young Han Lee ),( Kye Man Cho ) 한국응용생명화학회 2010 Applied Biological Chemistry (Appl Biol Chem) Vol.53 No.4
Endophytic bacteria have several ecological roles and can be used as biocontrol agents and also participate in antibiosis interactions. The diversity of endophytic bacteria associated with young radish (YR, yeulmu, Raphanus sativus L.) leaves and roots from Gyeongnam Agricultural Research and Extension Services in Jinju, Korea was investigated. A total of 264 colonies were isolated from the interior of YR leaves and roots. Phylogenetic analysis based on 16S rDNA sequences indicated that the isolates belonged to four major phylogenetic groups: high G+C Gram positive bacteria, low G+C Gram positive bacteria, Proteobacteria, and Bacteroidetes. Endophytic bacteria from the phylum Proteobacteria were predominant in the leaf (61.3%) and root (52.1%) samples. Most colonies that exhibited extracellular enzymatic activity belonged to the genus Bacillus, and Bacillus subtilis (YRL02, YRL07, YRR03, and YRR10) exhibited the stronger activities in extracellular enzyme such as amylase, cellulase, xylanase, mannase, PGAase, DNase, protease, and esterase than other colonies. In addition, Enterobacter sp. YRL01 and B. subtilis YRL02 had the highest amount of inhibitory action against human pathogenic bacteria, while B. subtilis YRR10 hand an inhibitory action against plant pathogenic fungi. Thus, these bacteria can be used as biocontrol agents against human and plant pathogens.
Effect of a JH Analog, Fenoxycarb, Egg Development of Scotinophara lurida (Burmeister)
Cho, Jum-Rae,Lee, Min-Ho,Kim, Hong-Sun,Lee, Dae-Weon,Boo, Kyung-Saeng Korean Society of Applied Entomology 2005 Journal of Asia-Pacific Entomology Vol.8 No.4
This study was carried out to investigate an effect of a juvenile hormone (JH) analog, fenoxycarb (FC), on egg development of the black rice bug, Scotinophara lurida (Burmeister). FC-treated S. lurida females could oviposit significantly earlier and more eggs than the untreated control. This gonadotropic effect of the JH analog followed a dose-dependent manner with a maximum over 200 ug doses per adult. Though developmental period of live eggs laid from the FC-treated females was not significantly different from the control, the FC treatment gave significantly adverse effects on the following embryonic development of S. lurida.
( Weon Jae Lee ),( Sang Goon Shim ),( Kil Jong Yu ),( Chang Uk Jeong ),( Ji Eun Oh ),( Kwang Min Kim ),( Hyun Jin Cho ),( Dae Hyun Jo ),( Hyoun Su Lee ),( Man Je Park ) 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1
Background: This retrospective study investigated abnormal hepatic dysfunction and abdominal computed tomography (CT) fi ndings in scrub typhus, and severity of hepatic dysfunction according to the number of CT fi ndings. Methods: 349 adult patients were diagnosed with scrub typhus. 94 underwent abdominal CT. The CT images were reviewed by the attending radiologist. Patient data of history, symptoms, signs, and results of laboratory tests were collected from the electronic medical records. Results: In 349 patients with scrub typhus, elevation of AST (78. 5%) and ALT (63. 0%) were dominant compared to ALP (27. 2%) and total bilirubin (16. 1%) (Table 1). Abdominal CT fi ndings of 94 patients were, in descending order of frequency, enlarged lymphnode (53. 2%), inhomogenous enhancement of liver (47. 9%), splenomegaly (46. 8%), ascites (28. 7%), low attenuation of periportal areas (27. 7%), gallbladder wall thickening (17. 0%), and splenic infarct (6. 4%) (Table 2) (figure 1). Also, the level of aspartate transaminase tended to be elevated according to the number of CT fi ndings (P= 0. 028). Conclusions: When scrub typhus is suspected in an endemic area, the hepatocellular pattern of hepatic dysfunction and the aforementioned fi ndings of abdominal CT may be helpful to the accurate diagnosis and improvement the patient prognosis, such as by the appropriate selection of antibiotics.