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Ah Reum Lee,Yu Ock Shin,Joo Young Lee,Min Yeong Kim,Sung Ho Shin,Bu-Il Seo,Young-Bae Seo,Man Hee Rhee,TakakoYokozawa,Chan Hum Park,Seong-SooRoh 한국약용작물학회 2015 한국약용작물학술대회 발표집 Vol.2015 No.05
Purpose Rhei Rhizoma (RR) is one of the herbal medicines traditionally used to treat diverse inflammatory diseases. The present study was undertaken to elucidate the antioxidant and anti-inflammatory activities of Rhei Rhizoma on experimental reflux esophagitis (RE) in rats. Methods The antioxidant activity of RR in vitro was measured in terms of radical scavenging capacity such as DPPH and ABTS. RE was produced by ligating both the pylorus and the transitional junction between the forestomach and the corpus. Rhei Rhizoma (125 and 250 mg/kg) were administered every day for 7 days, and its effect was estimated on comparison with RE control and normal rats. Results RR scavenged DPPH and ABTS effectively and IC50ofDPPH and ABTS radical scavenging activity of RR were 4.8 μg/ml and 15.75 μg/ml. The administration of RR decreased the elevated serum ROS in RE control rats. The RE control rats exhibited the down-regulation of antioxidant-related proteins such as Nrf2 and HO-1expression levels in the esophagitis; however, the level in the RR-treated RE rats was significantly higher than that in the RE control rats. Moreover, RE control rats exhibited the up-regulation of the protein expression related to oxidative stress at the esophagitis, but RR administration significantly reduced the expression of inflammatory proteins through the MAPK-independent signaling pathways. The expression of inflammatory mediators and cytokines by NF-κB activation was modulated through blocking the degradation of IκBα. In addition, the oral administration of RR regulated the gastric mucosal damage in RE rats. Conclusion The administration of Rhei Rhizoma effectively ameliorates the inflammatory damage of esophageal mucosa through radical scavenging activity and the activation of the Nrf2/HO-1 pathway.
중부지역 옥수수 파종기에 따른 생육단계 및 수량성 변화
서종호, 문중경, 정건호, 서민정, 구자환, 박장환, 배환희, 신성휴, 권영업 忠北大學校 農業科學硏究所 2014 農業科學硏究 Vol.30 No.2
Maize hybrids were planted on April 1, April 25, May 20 and June 15 in 2012, 2013 at the experimental paddy and upland fields in Suwon city , respectively to know changes of growth stage and yield according to different planting time. Maize planting on April 1 was not recommended because total growing days at planting on April 1 was not different with that at planting on April 25 due to many days from planting to emergence over 20 days at planting on April 1. Total growing days were not much different among three planting time after April 25 because days from silking to maturity was lengthened though days from planting to silking was shortened at later planting time. Stalk weight was decreased as planting time was delayed, particularly at planting times after May 20 at paddy field by excess water injury during early growth stage. But, grain yield was not low as in May and June. It is needed to introduce early maturity maize variety as Yanganok at late planting for higher grain yield and enough time for soil preparation for next winter crops
서성원,이승호 서울産業大學校 2000 논문집 Vol.51 No.2
The high-strength aluminum alloy, 7075-T651, was used to observe the fatigue-crack-propagation behavior for the various stress ratio wish constant amplitude loading and thus to predict the fatigue life. The crack length of through crack of weldments was 2.4mm and the remaining part was a base material. The experiment was accomplished by marking the crack propagate near the base material. The ratio of effective stress intensity factor range(U) was greatly increased at the interface of weld material and base material, with the maximum at R=0.3 and 0.5. The crack growth rate (da/dN) showed an increase at the interface.
유전자 알고리즘을 이용한 구형 마이크로스트립 안테나 설계
서호진,홍성욱,김흥수 濟州大學校 情報通信硏究所 1998 情報通信硏究所論文集 Vol.1 No.-
This paper presents how to optimize rectangular microstrip antennas using genetic algorithms. Genetic algorithms are global numerical-optimization methods. patterned after the natural processes of genetic recombination and evolution. Rectangular microstrip antennas is analyzed by all parameters of the improved transmission-line model. The algorithms encode each parameter which is the width. length and thickness of the patch, the width of the feed line and the thickness of the dielectric into binary sequences, called a gen. and a set of genes is a chromosome. These chromosome undergo genetic operators to arrive at the final optimal solution for the design of rectangular microstrip antennas. Genetic algorithms determine the parameters of rectangular microstrip antennas to yield the maximum antenna gains. Simulation results obtain antenna gains of 5.3dB. The genetic algorithm proves to be better than general algorithms
서성일,송시헌,김성호,김관태,김윤 대한신경외과학회 1995 Journal of Korean neurosurgical society Vol.24 No.2
The clinical analysis was carried out with 182 cases of craniocerebral injuries under 15 years of age, admitted at the Department of Neurosurgery, Chung Nam National Universty Hospital during the period from September, 1990 to September 1993. Following results were obtained : 1) There were 133 males and 49 females and sex ratio was 2.7% 2) Age incidence of the accidents was greatest at 6 years of age and mostly distributed to the age group between 4 to 7. 3) Seasonal peak of the accidents was at May. 4) The accident occurred mostly botween 4 P.m. and 6 P.m in a day.5) The most frequent cause of the craniocerebral injuries was traffic accident(105cases, 57.69%) 6) No deterioration of cansciousness before and after the admission was doserved in 68cases(37.36%) 7) Pupillary change was observed in 25 cases and Babinski sign was elicitable in 31cases 8) Early convulsion and vomiting were frequent symptoms in childhood. 9) Skull fracture was observed in 72 cases(39.56%) in which linear fracture was most frequent and predilection site was parietal bone. 10) The accompanying rate of skull fracture in intracranial hemorrhage was 65.54% 11) Associated injures were found in 44 cases(24.18%). The frequent ones were e xtremity fracture, clavicle fracture 12) The overall mortality was 7.14%.
徐成勳,洪南斗,權昌鎬,金壽億 慶熙大學校 1988 論文集 Vol.17 No.-
The effects of the aqueous extracts of Bupleurun falcatum and Bupleurum longiradiotum on the central nervous depressive action were studied by the behaviroral pharmacological method. The roots of Bupleuri radix was extracted with distilled water for 8 hours. Effect of extracts were tested by spontaneous movement activity using photoelectric method, openfield method, sloped plate method, rotarrod method and extension of hypnosis time induced with sodium phenobarbital and pentobarbital sodium, and defense against convulsive action induced with strychnine, picrotoxine and electric shock seizure in mice and rats. Extracts was found to pharmacologically expect above various action similar to these of diazepam but action of samples weaker than that of diazepame. Extracts of Bupleurum longiradiotum was definitely superior to the Bupleurum extracts in the central nervousderpressive action.
강인한 속도응답특성을 갖는 역기전력 MRAS 제어법을 이용한 유도전동기 속도제어 시뮬레이션
서영수,송호빈,음두성 明知大學校 産業技術硏究所 1999 産業技術硏究所論文集 Vol.18 No.-
In this paper, we proposed a Counter EMF MRAS(model reference adatation system)method. This using the indirect field oriented for calculated speed and a new reference model eliminated pure intergrator and low pass filter. So proposed controller have a robust speed identification and stable response. the described techiques are very simple, robust to motor's dynamic response. The proposed a new MRAS's effectiveness is verified by simulation using Matlab Simulink.
퇴행성 슬관절염 환자의 증상 중증도 지표와 DITI의 상관성 연구
서병관,류성룡,강중원,안경애,이재동,최도영,김건식,이두익,이윤호,이상훈 EAST-WEST MEDICAL RESEARCH INSTITUTE KYUNG HEE UNI 2005 東西醫學硏究所 論文集 Vol.2005 No.-
Objectives : To investigate the applicability of thermography as severity measurement in the patients with osteoarthritis (OA) of the knee. Methods : Data were obtained from 80 patiens with OA of the knee. They were asked to answer two disease-specific questionnaire (Western Ontario and McMaster Universities (WOMAC) OA index, Lequesne's Functional Index (LFI)), one generic instrument (Korean Health Assessment Questionnaire (KHAQ)), VAS in order to assess the severity of disease, quality of life, degree of pain and taken thermography in standardized environment. Results : The thermal difference between ipsilateral side and contralaterla side of lateral aspect of knee was correlated with that of medial aspect of knee, and the thermal difference of anterior thigh was correlated with that of lateral, medial aspect of knee and patella region. Age, duration of disease, duration of morning stiffness, sex, crepitus, and painful side of knee were not correlated with the thermal differences of each region. LFI, WOMAC, WOMAC pain subscale, WOMAC stiffness subscale, WOMAC physical function, KHAQ,, VAS were not correlated with the thermal differences of each region. Conclusion : Further study on the thermography on OA of the knee in population with appropriate severity grade and the standardization of analysis of thermographic data were recommended.