하절기 남양호의 수환경 요인 변화

임용석,나성태,신현철 순천향대학교 기초과학연구소 2003 순천향자연과학연구 논문집 Vol.9 No.2

An investigation was conducted on the water environmental factors at five sites in summer of the Namyangho from 29 May to 31 August 2003. As result, the water temperature was ranged 21.0-25.9℃, highest at site 5 in upsteam. The value of pH was stabilized, its was ranged 8.01-10.27. The dissolved oxygen(DO) was ranged 4.72-15.82 ㎎/l. The turbidity was ranged 13-64 NTU. The conductivity and salinity were 0.148-1.050 ㎳/㎝ and 0.00-0.04%, respectively. The conductivity and salinity were highest in 29 May and revealed similar pattern, also closely related to between.

하절기 아산호의 수환경 요인 변화

임용석,마선미,신현철 순천향대학교 기초과학연구소 2003 순천향자연과학연구 논문집 Vol.9 No.2

An investigation was conducted on the water environmental factors at six sites in summer of the Asanho from 29 May to 31 August 2003. The average values of water temperature in six sites were ranged 23.0-29.0℃, highest at site 6 in upsteam of the Asaho. The average values of pH, dissolved oxygen(DO), conductivity, turbidity and salinity in six sites were 8.55-9.00, 5.38-9.84 ㎎/l, 0.198-0.222 ㎳/㎝, 39.00-58.25 NTU and 0.002%, respectively. The water temperature, pH and DO were hoghest in 31 July, and revealed similar patterns, but conductivity and salinity were highest in 29 May, also closely related to between conductivity and salinity.

웹 서버 구현 방안들에 대한 성능 비교

임동관,선주호,김종욱,김용석 江原大學校 産業技術硏究所 2007 産業技術硏究 Vol.27 No.B

For Web server implementations, there are 4 main schemes: process-per-request (PPR), thread-per-request (TPR), worker thread pool (WTP), and worker thread pool with buffers (WTPB). This paper compares performance of the schemes in response time point of view. WTPB shows the best performance. The appropriate number of worker threads for WTPB depends on the request service time. For short requests, the number can be very small. But for longer requests, it is about 1/6 of the number of simultaneous connections.

D-Amphetamine이 니코틴성 흥분작용에 의한 카테콜아민 분비작용에 미치는 영향

임건한,서유석,민선영,임지연,김용직,나광문,임동윤 朝鮮大學校 附設 醫學硏究所 2005 The Medical Journal of Chosun University Vol.30 No.1

본 연구의 목적은 d-arphetamine이 흰쥐의 적출부신 관류모델에서 니코틴 수용체 흥분에 의한 카테콜아민(CA) 유리작용에 미치는 영향을 검색하여 그 작용기전을 규명하고자 하였다. D-amphetamine은 흰쥐 부신정맥내로 60분간 관류시 d-amphetamine자체는 약한 CA 분비작용을 나타내었으나, d-amphetamine (30 μM)을 비롯한 강력한 neuronal nicotine 수용체 작용제인 cytisine (50 μM) 및 epibatidine (30 μM)에 의한 CA 유리작용을 처음 4-10분 동안만 유의하게 증강시켰다. 또한, d-amphetamine (30 μM)은 60분간 부신정맥 내로 관류한 상태에서 dihydropyridine L-형 칼슘통로 개방약물인 Bay-K-8644 (10 μM)과 세포질내 칼슘저장고에서 Ca^(2+) ATPase 억제제인 cyclopiazonic acid (10 μM)의 CA 유리작용을 처음 4분간만 유의하게 증강시켰다. 그러나, 고농도의 d-amphetamine (500 μM)은 상기한 모든 분비촉진제의 CA분비작용을 오히려 억제하였다. 이와 같은 연구결과로 보면, 흰쥐 관류 부신수질에서 d-amphetamine은 낮은 농도에서는 콜린성 니코틴 수용체 흥분에 의한 카테콜아민 분비반응을 증강시키지만, 고농도에서는 오히려 억제적으로 작용함을 시사한다. 따라서, d-amphetamine은 용량에 따라서 흰쥐 적출 관류부신수질의 니코틴 수용체의 작용제 및 길항제로 이중 작용(dual action)을 나타내는 것으로 생각된다. 이러한 d-amphetamine의 작용은 흰쥐 부신수질 크롬친화세포의 dihydropyridine계 L-형 칼슘통로의 활성화 및 세포 내 칼슘저장고로부터 칼슘유리작용과 관련성이 있는 것으로 사료된다. The purpose of the present study was to examine the effect of d-amphetamine on CA release evoked by nocotinic receptor stimulation from the isolated perfused model of the rat adrenal gland, and to establish its mechanism of action. D-amphetamine(30 μM), when perfused into an adrenal vein of the rat adrenal gland for 60 min, enhanced the CA secretory responses evoked by ACh (5.32 mM), nicotine (30 μM), cytisine (50 μM, a selective neuronal nicotinic Nn-receptor agonist) and epibatidine (30 nM, a selective neuronal nicotinic Nn receptor agonist) only for the first period (4~10 min), although it alone has weak effect on CA secretion. Moreover, d-amphetamine (30 μM) in to an adrenal vein for 60 min also augmented the CA release evoked by BAY-K-8644, an activator of the dihydropyridine L-type Ca^(2+) channels, and cyclopiazonic acid, an inhibitor of cytoplasmic Ca^(2+) ATPase only for the first peroid (4 min). However, in the presence rather inhibited the CA secretory responses evoked by the above all of secretagogues. Taken together, these experimental results suggest that d-amphetamine at a low concentration enhances the CA secretion from the rat adrenal medulla evoked by stimulation of cholinergic nicotininc receptors, but at a high concentration it rather inhibits them. It semms that d-amphetamine has dual action acting as both agonist and antagonist at nicotinic receptors of the isolated perfused rat adrenal medulla, which are might be dependent on the concentration. It is also thought that these actions of d-amphetamine are probably relevant to the activation of the dihydropyridine L-type Ca^(2+) channels located on the rat adrenomedullary chromaffin cell membrane and release of Ca^(2+) from the cytoplasmic store.

담낭종양에서 CD24의 역할

임성철,이용,김동출,강길,변익건,박정희,최석민 朝鮮大學校 附設 醫學硏究所 2004 The Medical Journal of Chosun University Vol.29 No.2

CD24 is a small heavily glycosylated glycosylphosphatidylinosito-linked cell surface protein, which is expressed in hematologic malignancies as well as in a large variety of solid tumors, It appears to function as a ligand of PUselectin, an adhesion molecule that is present in activated platelets and endothelial cells. The authors aimed to evaluate CD24 protein expression in adenoma and adenocarcinoma of gallbladder to correlate to clinicopathologic data. The staining- was evaluated as stainability (negative, weak-, moderate-, strong-positive) and staining' patterns (membranous vs. intracytoplasmic) for statistical analysis. A highly significant association of cytoplasmic CD24 expression with adenocarcinoma compared to the adenoma of gallbladder was demonstrated. The present study demonstrates that CD24 was abundantly expressed on adenocarcinoma rather than on adenoma, but it was not statistically significant, Interrelation between the stainability or intracytoplasmic staining of CD24 and lymph node metastasis was not statistically significant. The authors conclude that CD24 is involved in tumorigenesis of gallbladder mucosa and intracytoplasmic expression of CD24 is an important molecular marker for malignant transformation.

수용성 키틴이 백서 창상치유에 미치는 영향

강장석,조용남,정상훈,유 결,임진수,권 호,조용우,고석원 大韓成形外科學會 2001 Archives of Plastic Surgery Vol.28 No.1

외상에 의한 영구치의 손상과 치아 고정술의 예후에 관한 연구

임현범,조용석,김경원 충북대학교 의과대학 충북대학교 의학연구소 1997 忠北醫大學術誌 Vol.7 No.1

경제 성장과 더불어 교통수단의 발달과 취미 활동에 대한 높은 관심과 함께 교통사고, 스포츠 등의 레저 활동, 폭력 등에 의하여 악안면부의 외상은 빈번하게 발생할 수 있다. 1996년 1월부터 1996년 12월까지 1년간 본과에 내원한 악안면부 외상 환자 중 상악골, 하악골, 관골 등의 악안면골 골절을 동반하지 않고 주로 치아 손상을 주소로 이에 대한 치아 고정술을 시행한 환자 43명에 대하여 의무 기록과 방사선 사진 등의 자료를 참고로 하여 영구치의 손상과 치아 고정술의 예후에 대하여 평가하여 다음과 같은 결론을 얻었기에 추후 영구치 손상 환자에 대한 치료술식과 예후 판정에 참고로 하고자 문헌 고찰과 함께 보고하는 바이다. 1. 치아 외상은 여자보다 남자에게서 더 많이 발생하였다. 2. 치아 외상을 받은 호발 연령은 10대와 20대였다 3. 치관 외상의 주된 원인은 낙상, 교통사고와 운동 순이었다. 4. 치아 외상시 가장 호발부위는 상악 전치부였다 5. 치아고정시 아치 바와 강선을 이용한 방법과 강선과 치과용 레진을 이용한 방법의 예후에는 큰 차이가 없었다. 6. 치아고정시 가장 큰 병발증은 치아 실활에 따른 신경치료, 치근 흡수, 발치였다. The injuries of the offal and maxillofacial region occrurred frequently because of the accidents, sports and violences. The authors experienced the injuries of the teeth that did not involve the bony fracture of the maxillofacial bones. We reviewed the 96 teeth of 43 patients that were fixed after replacement and/or replantation of luxated teeth during 1year(1996). We analysed and evaluated the treatment methods and the prognosis of the fixated teeth using the hospital records and radiographies. The results were as follows. 1. The occurrences of teeth injuries were more frequent in male than in female 2. The prevalent age groups were the second and third decades. 3. The major etiologies of teeth injuries were fall-down, traffic accidents and sports. 4. The prevalent teeth injured area were the upper anterior teeth area. 5. The prognosis of the teeth fixation methods between arch bar with wiring and wire with dental resin were not different significantly. 6. The major complications were the endodontic treatment due to discoloration and/or non-vitalization of teeth, root resorption and extraction of injured teeth.

경사도 변화에 따른 트레드밀 역보행의 운동학적 분석

김석희,우병훈,임용규 漢陽大學校 體育科學硏究所 2003 體育科學 Vol.23 No.23

The purpose of this study is to understand special features of back ward walking through 3-dimensional kinematic analysis of backward walking inconsideration of treadmill gradient in 10 male university students in the in twenties and to provide the information required for deciding workload or for preventing injuries. In this stuidy, the walking speed of the treadmill was set at 3.Okm/h and the gradient of the treadmill was set at 0°, 5° and 10°. the APAS were used for the collection of image data and analysis. and one-way ANOVA was used to analyze the differences according to gradients. As there analysis and result show, The first, cadence at 0° was higher than at 5° and 10° The second, support time at 5° was longer than that of 0° and 10°The third, ankle joint displacement became generally low as gradient increased. The fourth, in the knee joint, displacement became higher as gradient increased in the early stage of backward walking. ; however, there was no difference at the later stage. Lastly, no angle displacement of hip joints showed in back ward walking. The study suggests that it will be more desirable to analyze kinetic variables on the backward walking. Therefore it needs the following study for the factor like that continuously.

정향 수침액에 의한 아나필락시의 억제 효과

신태용,김상현,이석봉,엄동옥,임종필,이은희,김형민 우석대학교 의약품개발연구소 1996 藥學硏究誌 Vol.1 No.-

The current study evaluates the capacity of Caryophylli Flos water extract(CFWE) to regulate immediate allergic reaction by control of histamine release. CFWE was found to exhibit a ingibitory activity on the compound 48/80-induced anaphylaxis. CFWE inhibited the serum histamine release induced in anaphylaxis by compound 48/80. CFWE was also showed a dose-depent activity on the conpound 40/80-induced histamine release from the highly purified population of Alcian Blue-positive peritoneal mast cells. This result suggest that CFWE may be useful for the prevention and treatment of allergy related disease.

컴플라이언스法을 利用한 疲勞龜裂發生의 監視 System에 關한 硏究

崔鎔湜,石昌星,林昌鉉 成均館大學校 科學技術硏究所 1993 論文集 Vol.44 No.1

To predict the service life of many steel structures, an understanding of fatigue crack initiation in steel is required. In this paper, the monitoring system of a fatigue crack initiation by compliance technique was described and the fatigue crack initiation life by the system was compared by an ultrasonic technique. The fatigue crack initiation life of a notched specimen in SPS 5A steel was also investigated by the system.