서울의 PPNG 발생 빈도(1991-1992)

김재홍,윤기범,박평원,김영진,전경민,김영태,김중환,곽호,구상완,송민석,유옥,지혜구,김동원,문상은,박영립,정승호,성범진,성순제,엄주용,황정열,이기홍,이주협,전태진 대한화학요법학회 1994 대한화학요법학회지 Vol.12 No.1

The prevalence of PPNG among pretreated gonorrhea cases isolated at the STD clinic of Choong-Ku Public Health Center in Seoul has been studied and reported annually since 1981. In 1991, 123 strains of N.gonorrhoeae were isolated, among which 58(47.1%) were PPNG. In 1992, 98 starains of N.gonorrhoeae were isolated, among which 51(52.0%) were PPNG. In all, 109(49.3%) strains were found to be PPNG among 221 strains isolated between 1991-1992. The prevalence of PPNG in Seoul showed increased tendency till 1989, thereafter, it has been stationary or slightly decreasing.

결장 직장암 환자에서 근치적 절제술 후 혈청 CEA치의 변화에 대한 임상적 의의

김영훈,배병노,김기환,한세환,김홍주,김영덕,김홍용 대한대장항문학회 2003 Annals of Coloproctolgy Vol.19 No.6

인천지역 TDI 노출 작업자에서 직업성천식 유병율

김형렬,김철우,홍윤철,전형준,김치년,김현수,이지나,신주연,고동희,노재훈 大韓産業醫學會 2004 대한직업환경의학회지 Vol.16 No.2

목적 : TDI는 직업성천식을 일으키는 대표적인 물질로 알려져 있다. 과거 TDI에 노출된 작업자들의 천식 발생률을 5~6%가량 보고하였고, 국내에서도 2-20%에 이르는 유병율을 보고한바 있다. 작업환경이 많이 개선되고, 노출량이 감소된 최근에도 TDI에 의한 직업성천식에 대한 보고가 많이 이루어지고 있어, 이에 대한 적극적인 조사와 진단과정을 통해 유병율을 구하고 질병발생의 변화양상을 파악해 보고자 하였다. 방법 : 인천지역에서 특수건강진단을 수행하는 2개 기관의 TDI 노출 근로자 400여명 중, 사업장의 규모가 50인 이상이며 사업주가 연구진행을 허락한 사업장에서 근무하는 근로자 중 직접적으로 TDI에 노출되는 작업에 종사하는 근로자 170명을 연구대상으로 하였다. 이들에 대해 설문지와 산업의학의사의 면담을 통한 작업관련성 평가를 근거로 정밀대상자를 선정하고 이들에 대해 메타콜린 유발시험, TDI 유발시험 등을 수행하여 직업성천식을 확인하였다. 결과 : 설문조사 결과 11명이 직업과 관련하여 천식증상을 보이는 것으로 나타났고(6.9%), 이중 7명에서 메타콜린 유발검사 양성소견을 보였다. TDI에 의한 특이유발시험 결과 1명에서 양성반응이 나타나, 이 집단에서 TDI에 의한 직업성천식의 유병율은 0.58%였다. 결론 : 과거 국내연구에서 TDI에 의한 직업성천식의 유병율이 2~20%에 이르렀던 데 비해, 본 연구에서는 0.58%로 나타났다. 이는 국외 논문에서도 나타나는 경향으로 작업장 노출량 감소로 점차 발생률이 감소하는 양상을 보이고 있다. 그러나 이미 증상이 나타난 근로자들이 부서를 옮기거나, 직장을 그만둠으로 인해 그 유병율이 과소평가되었을 가능성도 있다고 판단된다. Objecdives: This study was carried out to estimate the prevalence of isocyanate-induced occupational asthma in toluene diisocyanate (TDI) exposed workers. Methods: We examined 170 workers who had been directly exposed to TDI through a medical questionnaire, physical examination, and pulmonary function test. Based on screening examination, workers with suspected occupational asthma were selected for further evaluation such as methacholine and TDI challenge tests. Results: Eleven (6.9%) among 170 workers complained of symptoms of occupational asthma. and 7 among these 11 symptomatic workers showed positive responses to the methacholine challenge test (4.1 %). One spray painter was confirmed as having the TDI induced occupational asthma following a positive response to TDI challenge test. Conclusions: The prevalence of TDI-induced asthma was at 0.58% was lower than that for former studies (2-20%). Improved workplace environment, lower level of TDI exposure compared to the past, and the healthy workers effect may have contributed to this low rate of asthma prevalence in workers with TDI exposure.

실리카흄을 흔입한 고강도 콘크리트 개발

홍창우,김태경,김경진,김성환,김남윤,심도식,이정호,윤청호,백민경,원치문,박제선,이주형,정경일 강원대학교 석재복합신소재제품연구센터 1996 석재연 논문집 Vol.1 No.-

콘크리트 구조물이 대형화됨에 따라 설계단면이 증대되어 상대적으로 많은 경제적 손실을 부담하게 된다. 따라서 단면을 감소시키면서도 소요의 하중에 안전한 구조물을 건설하기 위해서는 우선적으로 구조물 건설에 기초가 되는 고품질, 고내구성의 고강도 콘크리트 개발이 절실히 요구된다 본 연구에서는 일정 시멘트비 및 혼화재 비율하에서 소요의 워커빌리티가 확보되는 고강도 콘크리트를 시간과 온도의 변화에 따라 증기 양생하여, 압축, 인장, 휨강도 뿐만 아니라 파괴특성을 실험적으로 연구하였다. 시료 제작시 시멘트 입자 사이의 공극 및 불연속 영역을 충전하여 고밀도화하기 위한 콘크리트용 혼화재로 시멘트 비표면적이 상당히 작은 초미립 분말인 실리카흄을 이용하였다. 또한 AE감수제 및 고성능 유동화제를 사용하여 혼화재의 첨가에 의하여 발생될 수 있는 워커빌리티의 감소를 방지하였다. 실험결과에 의하면 일정 양생 지속 시간하에서 온도의 증가에 따라 콘크리트의 압축, 인장 및 휨강도가 전반적으로 증가하였다. 동일하게 일정 온도하에서 양생 지속시간이 커짐에 따라 강도들이 증가됨을 알 수 있었다. 따라서 상대적으로 높은 온도와 긴 지속 양생 조건하에서 파괴에 대한 저항력이 크게 나타났다. The compressible, tensible, and flexibleresistance of the high strength concrete is analyzed by the experimentation in the present study. For the test, we cure several samples with the silica fume as a mixture being become dense the spaces between the particle of cement under the variation of both the temperature and the curing-interval. Then, the superplasticizer and the ezcon are also used to satisfy the required workability for construction. The compressible, tensible, and flexible resistances to a stress are increased as increasing the temperature and the time interval for the curing. Therefore it is concluded that the overal fractural and mechanical properties is improved by mixing the silica fume into the cement.

만성 B형 간염환자에서 인터페론 치료 후 간 조직검사 소견의 변화와 Tumor Necrosis Factor의 임상적 의의

김홍수,윤동진,김은주,정일권,박상흠,이문호,김선주 순천향의학연구소 2000 Journal of Soonchunhyang Medical Science Vol.6 No.2

Background: Interferon has been widely used in the treatment of chronic hepatitis B, but its effectiveness is debatable. The clinical indices as the loss of HBeAg, HBV DNA, and improvement of liver function are applicated to identify the effectiveness of interferon therapy, but the mechanism of hepatohistological change is not well known. We investigated the changes of histologic finding and plasma tumor necrosis factor(TNF) in the patients with chronic hepatitis B after treatment with interferon-alpha. Methods: 11 patients with chronic hepatitis B who had treated by interferon-alpha were enrolled for this study. Liver biopsy was done before and after treatment of interferon and plasma TNF was evaluated at the same time. A semiquantitative study using a histologic scoring system was applied on pre and post liver biopsy specimens and the changes of HBeAg and HBV DNA were also evaluated. Results: Among subjects, the response group, recurrence group, and non-response group based on serologic response with clearance of HbeAg were6, 3, and 2 patients, respectively. The changes of serum ALT level and HBV DNA titer on pre and post therapy decreased significantly in the response group. The change of mean plasma TNF level in the response group decreased insignificantly to 19.4 from 19.9. The histological improvements of grading and staging were shown 4 patients in the response group. Conclusions: Serologic response with clearance of HBeAg was associated with histolofical improvement. The loss of HBsAg in the serum was significant indicator of reduction in the amount of HBV core antigen and HBV surface antigen in the hepatocytes. Plasma TNF level was not associated with response of interferon-alpha therapy and histologic activity.

연령증가에 따른 혈압요소들의 좌심실비대 및 관동맥질환과의 관련성

박재석,박창규,박미영,박재형,김용현,나진오,신성희,서순용,홍순준,박성미,임홍의,김응주,서홍석,오동주,노영무 대한순환기학회 2004 Korean Circulation Journal Vol.34 No.2

암센서용 TiO2/Au/CNT 나노복합물의 전기화학적 검출

홍성미, 김홍일, 김한주, Wang, Xuemei, 박수길 충북대학교 건설기술연구소 2008 충북대학교 건설기술연구소 논문집 Vol.27 No.1

Demand of rapid detection for cancer, it is necessary that high sensitivity, specificity, low cost, and simple method. CNT and metal nano materials are widely used to elecate efficient. CNT have various advantage, and can be composed with metal nano materials. Especially, Titanium oxide and gold nano particles are focused on sensor for detection of cancer, it can elecate electron transition feeiciency between electrode surface and target materials, and biological functionalization of CNT. It means that nano material is composed each other. In this study, electrodes are considered materialsd and their chracteristic for cancer sensor.

불산 농노변화에 따른 실리콘 초기 직접접합에 관한 연구

김창교,이주헌,이재홍,노일호,양성준 순천향대학교 부설 산업기술연구소 2001 순천향 산업기술연구소논문집 Vol.7 No.2

A new method using HF solution for direct bonding of two silicon wafers at room temperatyre was developed. The HF bonding was carried out with 1.5% HF solution with 1 Kgf/cm2. The characteristics of the bonded samples were measured under different bonding conditions according to HF concentrations and applied pressure to the samples. With an evaluation of the new bonding method, we confirmed that the method ensures enough strength, air tightness and optical property. An advantage of this method is simplicity of bonding process in comparison with a conventional thermal bonding method. The boned interface and void were analysis by SEM and RARM camera.

남은 음식물을 이용한 액상발효 양돈사료의 경제성 분석

김정주,박홍양,노순창 건국대학교 자연과학연구소 1999 建國自然科學硏究誌 Vol.10 No.2

This study was aimed to calculate the cost collecting food garbage for the use as the fermented-food-garbage-feed for hog and to compute the processing cost of the feed. Based on the results of the feeding tests on hogs, the profitability of hog raising with the fermented-food-garbage-feed for hog fattening was analyzed. When the farmers fed the fermented-food-garbage-feed for hog fattening, nearly 10,000 won of loss occurred per head. Therefore, without compensation for this amounts, hog farmers would not have any interests this project. In macro economic aspect, 60.0~102.6 thousands M/T of corn for feed, which is worth of 4.8~32.0 million dollars of feed cost would be saved as a whole. Besides, by using the fermented-food-garbage-feed for hog, 95.4~67,840 million Won of garbage treatment costs could be saved. When these substantial economic effects are considered, this project would deserve to be adopted as a government policy for environment protection.

척추 수술시 자가혈액 수혈기를 이용한 자가수혈의 효과

김명호,유문집,유석주,박진영,정홍근,박희곤,문기혁 단국대학교 2000 論文集 Vol.35 No.-

Study Design : Spine fusion with fixation procedure is associated with substantial operative blood loss, which frequently necessitates transfusion. The authors evaluated the safety and efficacy of intraoperative autotransfusion using Cell Saver during spinal surgery. Summary of Literature Review : It has been reported that the contraindications to the use of intraoperative autologous transfusion are malignancy, infection, and gross wound contamination. Objectives : The purpose of this study was to evaluate the safety and efficacy of intraoperative autotransfusion using Cell Saver during spine surgery. Material and Methods : We retrospectively reviewed 62 patients who had operation for lumbosacral spinal stenosis and hypotensive anesthesia. Among them, Group Ⅰwhich received autotrans fusion using Cell Savers included 26 patients with fusion of 2 segments, and Group Ⅱ as control group included 13 patients. Group Ⅲ which received autotransfusion using Cell Savers included 17 patients with function of 3 segments, and Group Ⅳ as control group included 6 patients. We analyzed the amount of intraoperative blood salvage using a Cell Saver, the amount of total homologous transfusion amount, intraoperative blood loss, the amount of postoperative drainage amount and perioperative changes of hemoglobin, hematocrit and platelet count. Results : There was no statistical significance between Cell-Saver group and control group in amount of total homologous transfusion and intraoperative(except in 2 segment of fusion using cell saver: 86.5% increased) & postoperative blood loss(p>0.05). The circulatory balance(amount of intraoperative blood salvage using a Cell Saver plus amount of total homologous transfusion minus amount of total blood loss) was statistical significance between Cell-Saver group and Control group. The Cell-Saver group had positive balance and Control group had negative balance. There were no statistical differance in the evolusion of hemoglobin, hematoocrit and platelet count between Cell-Saver group and Control group(p>0.05). There was no transfusion reaction and thromboembolic disease in all group. Conclusion : In retrospective study, Cell Savers was safe and immediate availability in orthopedic surgery such as spinal surgery. It was effective methods for storing a sufficient volume of blood for spine surgery without affecting the patient's postoperative hemodynamic ststes, too. It was possible to operation without intraoperative homologous blood transfusion in 2 or 3 segment fusion. We may need further study.