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보문 : 버섯 세균성갈색무늬병원균(Pseudomonas tolaasii)의 분비 독소(tolaasin)를 저해하는 미생물 Pseudomonas sp. HC1
이찬중 ( Chan Jung Lee ),유영미 ( Young Mi Yoo ),한주연 ( Ju Yeon Han ),전창성 ( Chang Sung Jhune ),정종천 ( Jong Chun Cheong ),문지원 ( Ji Won Moon ),서장선 ( Jang Sun Suh ),한혜수 ( Hye Su Han1 ),차재순 ( Jae Soon Cha ) 한국균학회 2013 韓國菌學會誌 Vol.41 No.4
A Gram-negative bacterium was isolated from mushroom media that markedly reduces the level of extracellular toxins (i.e., tolaasins) produced by Pseudomonas tolaasii, the most destructive pathogen of cultivated mushrooms. The HC1 strain was selected as detoxifying tolaasin by bioassay on potato and it was identified Pseudomonas sp. by the cultural, morphological and physiological characteristics, and analysis of the 16S rRNA.. The isolated bacterium is saprophytic but not parasitic nor pathogenic to cultivation mushroom. The isolated bacterium for P. tolaasii cell, was sufficient for detoxification in vitro. Inoculation of the isolated bacterium prevents the development of bacterial disease in Pleurotus ostreatus, Flammunia velutipes and Agaricus bisporus. Control efficacy of brown blotch of strain HC1 treatment was 69, 68 and 55% on Agaricus bisporus, Flammulina velutipes and Pleurotus ostreatus, respectively. The suppressive bacterium may be useful in future for the development of biocontrol system and the construction of genetically modified edible fungi resistant to the disease caused by P. tolaasii.
스피커 특성 및 오차경로의 온라인 인식을 이용한 새로운 적응 능동소음제어
한찬호,최덕규,정영헌 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(B)
In active noise control system, the error path transfer function is much more likely to change rapidly due to in temperature or flow rate. The loudspeaker response also changes due to aging and the other factors. Therefore, an improved solution to obtaining both the loudspeaker and the error path transfer functions on an on-line basis is required. In this paper, a new filtered-X least mean square(LMS) algorithm considering the loudspeaker and the error path characteristics is proposed for active noise control system. The transfer functions of the loudspeaker and the error path are obtained by an adaptively estimated error signal and the error path output signal on an on-line basis. In the computer simulation using the sinusoidal and the practical duct noise, the proposed algorithm reduces noise level about 29.1dB and 10.4dB, respectively. We observed an improvement of about 2.5dB in noise level compared with that obtained using the Eriksson's filtered-X LMS algorithm.
산화아연계 무기질과 솔잎추출물 첨가에 의한 농산물 포장 필름의 광 및 미생물 열화능 개선
한신,나현정,강용구,박찬영 전남대학교 촉매연구소 2001 觸媒硏究 論文集 Vol.22 No.-
To invent environmentally friendly materials for packaging of agricultural produce, morphological and mechanical properly changes after daylight exposure and soil deposit for LDPE films composed of different incorporation substances have been investigated. Silver coated ceramic, zinc oxide, fine particle of ferrofluid and pine needle's extract were the incorporated substances. The pine needle's film degrades fast in soil while the silver coated ceramic's film shows daylight decay more on the morphological view. The mechanical strength keeps almost same. But turndown of elongation is explicit on the pine needle's film and silver coated ceramic's film.
한찬호,정영헌,최덕규 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(B)
In this paper, we present a compensation method of contrast loss in highly bright region by CPT beam profile. In the proposed method, the local difference signal for the compensation is transformed according to the local mean of luminance. In computer simulation, clear image is obtained by the compensation of contrast loss in highly bright region.
한찬수,김태정,김일호,김유재,김천숙,안기량 순천향의학연구소 1996 Journal of Soonchunhyang Medical Science Vol.2 No.2
Aspiration of a foreign body in the airway is common cause of sudden obstructive breathing, crouping cough, hoarseness, and wheezing. Especially that caused serious problem in case of the young children. A past history of foreign body aspiration is itself an indication for bronchoscopic examination of the airway, because some children with aspirated foreign bodies are without symptoms and chest X-ray films may not show abnormalities. So the anesthesiologist should take a notice of removing foreign body in the anesthetic procedure. The author have experienced 36 cases removal of foreign bodies in the airway under general anesthesia from July, 1982 to January, 1996 in Chunan Hospital, College of Medicine, Soonchunhyang University. The results were as follows 1) Among the 36 cases, 25 cases(69.7%) were under the age of 5. The ratio of male and female was 1.8 : 1. 2) In duration of lodgement, there was most frequent within one day in 15 cases(41.7%) and the longest duration was 20 days. 3) The most common symptom, sign and auscultation finding were cough 19 cases(52.8%). chest retractions 7 cases(19.4%) and decreased breathing sound 20 cases(55.6%) 4) Abnormalities in the chest X-ray were found in 15 cases(41.7%) among 36 cases. 5) Vegetable foreign bodies, expecially peanut were the most common airway foreign body(28.7%), followed by plastic foreign body(14.4%) and mucous plug(11.3%). 6) The foreign body involved the right bronchus 16 cases(45.7), left bronchus 10 cases(28.6%), trachea 5 cases(14.3%), and larynx 4 cases(11.4%). 7) Foreign body induced complications occurred in 9 cases(25.0%); pneumonia 8 cases and pneumomediastinum 1 case, and all of postoperative complication was pneumonia(25.0%). 8) 34 foreign objects(94.4%) were removed by endoscopy but tracheostomy was required in two patients.
정영헌,한찬호,최덕규 경운대학교 산업기술연구소 2001 産業技術硏究論文誌 Vol.3 No.2(C)
The Multiple Hypotheses Tracking (MHT) algorithm has been shown to be one of the most cost- effective estimation schemes for hybrid systems. Its performance, however, could only evaluated via expensive Monte-Carlo simulations. An effective hybrid approach to the performance evaluation without recourse to simulations is presented here. This approach is based on a scenario-conditional performance measure of hybrid nature in the sense that it is a continuous-valued function of a discrete-valued random sequence. The performance measure is calculated efficiently in an off-line recursion.
수종보익제가 면역세포의 조절 및 Apoptosis에 미치는 영향
한종현,강성용,정현우,오찬호,권진,은재순 대한본초학회 1997 大韓本草學會誌 Vol.12 No.1
The effects of several tonifying prescriptions on the apoptosis of transplanted L1210 cells and the regulation of immune cells in L1210-transplanted mice were studied. Sa-Mul-Tang(SMT), Sa-Kunja-Tang(SKT), Sipjeon-Daebo-Tang(SDT) accelerated the apoptosis of transplanted L1210 cells, and SMT and SKT reduced the mitochondrial transmembrane potential of transplanted L1210 cells. SMT promoted the proliferation of thymocytes and splenocytes in L1210-transplanted mice. Whereas SMT increased CD8+ T_c/T_S cell, Bojung-Ikki-Tang(BIT) decreased CD4+ T_H cell population in the thymocytes of L1210-transplanted mice. SMT and SKT increased the lucigenin chemiluminescence from peritoneal macrophage of L1210-transplanted mice. These results indicate that SMT and SKT have an inductive action of apoptosis of transplanted L1210 cells and peritoneal macrophage activation.
박찬흥,오원택,김정한 연세대학교 산업기술연구소 1989 논문집 Vol.21 No.2
A practical synthesis of cis-jasmone (9) from readily available levulinic, acid was described. Levulinic acid ethylene dithioacetal (3) was reacted with 2-mercaptopyridine in the presence of DCC and DMAP in dichloromethane to give S-(2-pyridyl)-4-ethylenedithiopentanethioate (4) in excellent yield. The compound (4) was then allowed to react with cis-3-hexenyl Grignard reagent to produce cis-undec-8-ene-2,5-dione monoethylenedithioacetal (7) in very high yield. Compound (7) when treated with CuCl₂/CuO in acetone afforded cis-undec-8-ene-2,5-dione (8) which was then cyclized under basic condition (NaOH/H₂O, ??) to cis-Jasmone (9) in 81% yield. Thus a very important fragrance compound cis-Jasmone was synthesized from levulinic acid by 5 steps in 63% overall yield.
필기체 숫자인식의 최적 신경망 구조 설계를 위한 개선된 유전자 알고리즘
박찬란,김향태,정재영,위승정,최봉한,최호진,이웅기 조선대학교 통계연구소 1999 統計硏究所論文誌 Vol.1 No.1
본 논문에서는 필기체 숫자인식의 최적 신경망 구조 설계를 위하여 유전자 알고리즘과 역전파 알고리즘을 병합하는 방법을 이용하였으며, 유전자 알고리즘은 유전인자의 역할에 따라 독립적으로 적응하는 개선된 선택, 교배, 돌연변이 연산자를 제안하였다. 실험결과는 유전인자의 역할에 적응하는 개선된 연산자들의 실행으로 최적의 신경망 구조를 설계하였고, 설계된 신경망 구조에서의 학습이 가장 좋은 성능을 나타내었다. In this study, the method of using both genetic algorithm and back propagation is proposed to design the structure of optimal neural network recognizing handwritten digits. Improved selection, crossover and mutation operator which can control the genetic algorithm independently according to the role of gene are used in the proposed method. Simulation result shows that the neural network of this method can search effectively the optimal hidden node numbers, connection weight, learning rate and the momentum because of above proposed operators.