TMPFS/Polysiloxane 혼합물의 표면특성

오경수,범정철,하종욱,박인준,소원욱,이수복 한국공업화학회 2004 응용화학 Vol.8 No.1

We report on the surface proputies of the films composed of polysiloxane and trimethoxyperfluorosilane(TMPFS). In this study, the PFS was introduced in order to enhance soil-proof property of siloxane polymer. Surface properties of the mixture were investigated. Contact and sliding angle measurements were done in order to investigate the anti-soil, and soil release properties, respectively. The surface free energy of siloxane polymer was decreased remarkably by incorporation of small quantity of PFS with the increment of contact angle and decrease of sliding angle. The TMPFS/Polysiloxane mixture film may provide a great opportunity for the antisoil applications.

신이식에서 이식신의 생존분석

오선미,김종학,황평주,구영선,강민규,나기량,김종섭,김성숙,이강욱,신영태,설종구,배진선,손기섭 충남대학교 의과대학 지역사회의학연구소 1997 충남의대잡지 Vol.24 No.2

To investigate the prognostic factors for the survival of transplanted kidney in patients with end-stage renal failure, 59 cases of renal transplantation from September 1986 to Feburary 1997 in Chungnam National University Hospital were analyzed retrospectively. The results were as follows: 1)The mean age of recipients was 33.8 years and that of doners was 38.9 years. The male to female ratio of recipients was 2.5:1, and that of donors was 1.03:1 2) Living related donore(LRD) were 79.6% and living non-related donors were 20.3%. The HLA-identical donors(ID) in LRD were 18.7% and HLA-haploidentical donors(HID) were 61.0%. In living non-related donors(LNRD), mean matched HLA-AB antigens were 1.56 and mean matched HLA-DR antigens were 0.56. 3) The average 5-year patient survival fate was 94%, and average 5-year graft survival rate was 70%. The 5-year graft survival fate of HLA-ID was 100%, and those HLA-HID and LNR were 70% and 36% respectively. 4) Total 33 episodes of acute rejection were found in 45.8% of transplanted patients. The number of acute rejection episode did not show significant difference between LRD and LNRD(P > 0.05). There was no significant difference in MLC between two groups(p > 0.05). 5) In comparison between the 18 patients who lost their graft function in 5 years and 17 patients who are maintaining graft function for more than 5 years, MLC was significantly lower in patients with functioning graft than of patients with non-functioning graft (p < 0.05). The number of rejection episode was also lower in patients with functioning graft than that of the patients with non-functioning graft(p < 0.05). However, there were no significant difference in recepient and donor age and history of pre-transplantation donor specific transfusion between two groups. With the results above, we can speculate that adequate donor selection according to good matched HLA typing and low MLC is very important for graft survival in renal transplantation. Prevention and treatment of acute rejection in renal transplantation is also na important factor for graft survival.

성인 막성신병증의 임상적 고찰

양종오,이상주,박기현,장윤경,이강욱,서광선,신영태 충남대학교 의학연구소 2001 충남의대잡지 Vol.28 No.2

Membranous nephropathy (MN) is a glomerular disease characterized by diffuse thickening of the glomerular basement membrane without significant mesangial proliferative change and is usually manifested by the nephrotic syndrome. To evaluate the clinical and pathologic characteristics of this disease in adults, we analyzed 65 patients with primary membranous nephropathy who were diagnosed at Department of Internal Medicine, Chungnam National University Hospital from February 1986 to February 2001. The results are as follows: 1) Of total 96 patients with membranous nephropathy, 67.7% was primary MN. Hepatitis B-associated MN and lupus MN were 22.9%, and 9.4%, respectively. Median duration of follow-up was 35.1 months(0.3∼177) in primary MN, 49.6 months(2.5∼103) in lupus MN, and 35.6 months(0.5∼108) in hepatitis B-associated MN. 2) Mean age of the patients with primary MN at the time of diagnosis(43.3 years) was significantly higher than that of lupus MN(30.4 years) and HBV-associated MN(36.2 years). Male to female ratio of primary MN was 1.03:l. 3) At the time of diagnosis, 89.2% of primary MN was presented with nephrotic syndrome. Twenty seven percent of patients showed hypertension. Hematuria was found in 58.5% of primary MN patients. Azotemia was noted in 3.1 %. 4) Global sclerosis, tubular atrophy and interstitial fibrosis were noted in 39.8, 16.1 and 11.3% of primaty MN, respectively. IgG and C3 were deposited on the glomerular capillary loop in 92.7% and 29% of primary MN patients. There was no significant correlation between the electron microscopic pathologic stage and clinical findings. 5) Of 56 patients with primary MN followed more than 6 months, 50(90.9%) patients were treated with prednisolone, cyclophosphamide or cyclosporin. Complete remission was obtained in 29 patients(51.8%), partial remission in 6 patients(10.7%), and no response in 18 patients(32.1%). Of 6 patients who were not treated with immunosuppressive drugs, 3 patients showed spontaneous complete or partial remission. Three patients who did not show clinical improvement progressed to end-stage renal failure. There were no significant clinical difference including renal pathology at the time of diagnosis between the patients who showed complete or partial remission and patients who did not. In conclusion, it was difficult to predict the long-term prognosis of primary MN at the time of diagnosis, clinically. The response to therapeutic modality would be the most important to predict long-term prognosis of primary MN.

강진만에서 미생물의 년 변화

박종천,오재영,정용욱,주현수,이원교,유춘만,이우범 國立 麗水大學校 환경문제硏究所 2001 環境硏究論文集 Vol.4 No.-

The biological surveys were performed at seven sites in the Gangjin bay from February, 1998 to November, 2001. In order to analysis of environmental variation, numbers of heterotrophic bacteria, general fungus and fecal coliforms were enumerated in each sample. The result showed that variation range of heterotrophic bacteria, general fungus, and fecal coliforms were 2.9 x 10^(3)~9.6 x 10^(3) CFU/ml, 17.2~80.1 CFU/ml, and 6.3~682.5 CFU/100ml for four tears(1988~2001), respectively. Density of heterotrophic bacteria and general fungus were gradually decreased for four tours, while fecal coliforms were suddenly increased. Specially, numbers of fecal colifoms were increased the more 100 times in 2001 than that 1998. We think that it was probably caused a little rainfall in February, 2001. There result suggests that ecosystem of Gangjin bay were mainly regulated by 2~3 factors, which were inflow of fresh water, salinity and variation of water temperature.

천연두 백신 접종 후 발생된 급성 심근염 1예

박옥성,김종환,이광욱,윤성훈,강동구,이승욱,조상기 朝鮮大學校 附設 醫學硏究所 2006 The Medical Journal of Chosun University Vol.31 No.2

Acute myocarditis complicating coronary vasospasm after smallpox vaccination is very rare complication that can be generally developed within less than 30 days after vaccination. Clinically and biochemically, this disorder is often mimic and highly suggestive of acute myocardial infarction. We report 21 years old man that had a history of a smallpox vaccination 3 weeks ago and prodromal symptoms(fever, malaise etc) a few days ago. hIe visited to our hospital because of abrupt onset of severe substernal chest pain, dyspnea and diaphoresis. At admission, electrocardiography was ST elevation in lead Ⅰ, aVL, V4, V5, and V6. The CK-MB level was 68 U/L, LDH level was 760 U/L, Troponin-Ⅰ was 24.64 ng/㎖, and Troponin-T was positive. 2D-echocardiograpy was normal left ventricular function, Clinically we presumed this disorder as acute myocardial infarction and we promptly performed the coronary angiography and revealed focal spasm in distal left coronary artery territory without critical stenosis in both coronary arteries. We diagnosed this disorder as coronary vasospam complicating acute myocarditis that is different with acute myocardial infarction, and we prescribed nitroglycerin and nifedipine. After discharge, he is now well without any symptoms and has been following up monthly at our outward department for 6 months.

무선 ATM에서 ABR 서비스를 위한 MAC 프로토콜에 관한 연구

강상욱,윤정오,정종혁 경운대학교 산업기술연구소 2000 産業技術硏究論文誌 Vol.3 No.1(A)

In this paper, we describe a wireless MAC protocol named APRMA(Abitrary Period Reservation Multiple Access), which is capable of supporting the ABR type data service and maximizing channel utilization. In original PRMA protocol, data terminals with random data packets cannot reserve slot. That is, slot reservation is applicable too the time constraint voice packet exclusively. But the reservation scheme have to be performed for loss sensitive data packet, so data packets can get their quality of service. The aspects of service, if fixed bandwidth is allocated to data terminals, time constraint voice packets may have a low efficiency. So in this study, the terminal which wants to request for ABR type service, acquires a minimum bandwidth from system for the first time. If the system have extra available bandwidth, ABR terminals would acquire additional bandwidth slot by slot. As a result, APRMA protocol can support the data service with loss sensitivity and maintain their channel utilization highly. Also high priority services like voice can be satisfied with their QoS by APRMA

방사선 조사 후 대뇌결질에 분포한 Neuropeptide-Y 양성신경세포에 관한 면역조직화학적 연구

이상욱,김종중,정윤영,정종달,오윤경 조선대학교 2000 The Medical Journal of Chosun University Vol.25 No.2

Background and Objectives : Severe irradiation on the cerebral cortex of the human and animals may result in functional alterations of central nervous system. The purpose of this study, the irradiation effects on the cerebral cortex of the rats after brain irradiation was to investigate the change of distribution and morphology of neuropeptide-Y(NPY) neurons. Materials and Methods : Radiation was produced by the linear accelerator 6MV X-ray, and the animals were categorized into control and experimental groups and we use 45 Sprague-Dawley rats weighing about 200~250gm. The head areas of the animals were positioned within the radiation field of 12㎝ × 20㎝ and with the radiation depth of 1.5㎝. Sodium chloral hydrate-anesthetized rats were exposed to the radiation with the dose rate of 240 cGy/min. The total dose was 1800 cGy. Animals were sacrificed on 2 hours, 5 hours, 1 day, 3 days, 7days after brain irradiation. Under anesthesia, animals were perfused with 4% paraformaldehyde-1% glutaraldehyde solution. On one or two hours after the perfusion, brain were taken out and refixed over night in the same fixative. Using ABC immunohistochemistry, morphology and distribution of neuropeptide-Y immunoractive(NPY-IR) neurons were studied on the cerebral cortex of the control and brain-irradiated rats. We used light, transmission electron and confocal laser scanning microscope. Results : The following results were obtained : 1. On control group, NPY-IR neurons were found in all layers of the primary sensory and motor cerebral cortex, and the NPY-IR neurons were concentrated within the layer II, III, IV, V and VI. The typical NPY-IR perikarya was bipolar and multipolar shape. 2. On 2 hours, 5 hours, 1 day after X-irradiation, decreased number of NPY-IR neurons were detected in the primary sensory and motor cerebral cortex of the rats. Also shrunken and transformed NPY-IR neurons were detected in the primary sensory and motor cerebral cortex of the rats. 3. On 3 days and 7 days after X-irradiation, morphology and distribution of NPY-IR neurons in the primary sensory and motor cerebral cortex was generally restored. 4. In optical serial section analysis of NPY-IR neurons, high fluorescence intensity were observed in a part of the 8~11 sections of the control and all irradiated groups. In optical single section analysis of NPY-IR neurons, red color(high fluorescence intensity) was observed in a part of 6, 7 sections of the control and all irradiated groups. 5. By electron microscopy, NPY-IR neurons on 2 hours, 5 hours, 1 day after X-irradiation rats exhibited severe alterations of their organelles concerning intracellular material transport ; such as disappearance of microvilli and basal infoldings, reduction of invaginating pits on the basal and apical plasma membranes, reduction of transformed vesicles and shrunken Golgi complexes, etc. Conclusion : From the above results, it was concluded that the release of neurotransmitters and transcapillary leakage of blood substance were occurred on 2 hours, 5 hours, 1 day after X-irradiation, but the condition was generally restored on 3 days and 7 days following X-irradiation.

칼 슈미트憲法槪念의 韓國的 展開

裵相五,文鍾旭 忠南大學校 法學硏究所 1995 法學硏究 Vol.6 No.1

자돈에 있어 게르마늄 용질액의 급여가 성장 및 혈액학적 변화에 미치는 영향

홍종욱,권오석,민병준,조진호,진영걸,손경승,강종옥,김인호 한국국제농업개발학회 2004 韓國國際農業開發學會誌 Vol.16 No.4

본 연구의 목적은 이산화게르마늄을 함유한 게르마늄 용질액을 자돈에 급여하였을 때 성장 및 혈액학적 변화에 미치는 영향을 조사하기 위하여 실시하였다. 3원 교잡종 자돈 60두 (평균체중 11.22±0.10㎏)를 공시하였다. 시험설계는 옥수수-대두박 위주의 대조구(CON)와, 대조구 사료내 게르마늄 용질액을 0.5 ppm 첨가한 구(GC0.5) 및 대조구 사료내 게르마늄 용질액을 1.0 ppm 첨가한 구(GC1.0)로 3개 처리를 하였다. 0-10일간 사양시험기간동안, 일당증체량에 있어서 GC0.5 처리구가 약간 높게 평가되었다(quadratic effect, P<0.02). 그러나 전체 시험기간동안, 일당증체량, 일당사료섭취량 및 사료효율에 있어서 처리구간에 유의적인 차이는 보이지 않았다. 영양소 소화율에 있어서는 GC0.5 처리구가 조회분(linear effect, P<0.01; quadratic effect, P<0.04), 칼슘(linear effect, P<0.01; quadratic effect, P<0.01), 인 (linear effect, P<0.02; quadratic effect, P<0.04) 소화율이 유의적으로 높게 평가되었다. 혈액내 neutrophil 농도에 있어서는 게르마늄 용질액의 첨가 수준이 증가함에 따라 유의적으로 증가하는 경향을 나타내었다(quadratic effect, P<0.02). 결론적으로, 자돈 사료내 게르마늄 용질액의 급여가 성장 및 혈액학적 수치에는 영향을 미치지 못하는 것으로 사료된다. This study was conducted to investigate the effects of dietary germanium colloid on the growth performance and hematological values in nursery pigs. Sixty pigs (11.22(0.10 ㎏ average initial body weight) were used in a 20 d growth assay. Dietary treatments included 1) CON (basal diet), 2) GC0.5 (basal diet+0.5 ppm germanium colloid) and 3) GC1.0 (basal diet+1.0 ppm germanium colloid). For d 0 to 10, pigs fed GC0.5 diet grew faster than pigs fed CON and GC1.0 diets (Quadratic effect, P<0.02). However, through the entire experimental period, no statistical differences were found for aver-age daily gain, average daily feed intake and gain/feed. Apparent digestibilities of crude ash (Linear effect, P<0.01; Quadratic effect, P<0.04), calcium (Linear effect, P<0.01; Quadratic effect, P<0.01) and phosphorus (Linear effect, P<0.02; Quadratic effect, P<0.04) in pigs fed GC0.5 diet were greater than for pigs fed CON and GC1.0. Neutrophil concentration in blood increased as the concentration of germanium colloid in the diets was increased with significant difference (Quadratic effect, P<0.02). In conclusion, growth performance and hematological values were not influenced by dietary germanium colloid.

BIPV 건물 외피시스템 개발 : Curtain Wall의 일체화 가능성을 중심으로 Focused on the unification possibility to the Curtain Wall

임종욱,오민석,김회서 대한건축학회 2004 대한건축학회논문집 Vol.20 No.2

PV system(Photovoltaic system) as an alternative energy resource for a fossil fuel is judged to have an enormous possibility in a usable point of earth, everywhere. Therefore, this paper intends to advance its practical use by proposing how to get integrated PV system which can be applied to building external curtain wall, and how to apply it. It has materialized the possibility of integrating details which can be applied to curtain wall by making insulating glass PV (the performance of insulation has been improved) through adding the layer of air (12 ㎜) and rear glass (6 ㎜) to integrated sandwich glass PV module. The proposed insulating glass PV module was applied to vision and then, the load was measured. The result shows that because of influence by solar radiation to the southern part in summer, it is advantageous for energy saving and it can make an additional effect of peak cut.