혈중 및 호기 일산화탄소를 이용한 일산화탄소 헤모글로빈 농도간의 관련성 연구

김형수,박태혁,손지언,정갑열,김정만,김준연 동아대학교 2001 大學院論文集 Vol.26 No.-

This study was conducted to find a correlation between blood COHb and calculated COHb with expiratory air and related variables such as occupational and smoking factors. Author selected 69 healthy workers in 8 workplaces suspected CO exposure. Basic informations were collected by self-reported questionnaire and medical history taking. Author measured Indirect COHb concentration with expiratory air using Micro II-Smokerlyzer and blood COHb concentration using Oxymeter. The results of the study were summarized as follows : 1. In the smoker, mean blood COHb and calculated COHb with expiratory air were 2.21±0.98% and 2.27±0.97 %, and there was not a statistically significant difference. In the non-smoker, mean blood COHb and calculated COHb with expiratory air were 0.42±0.43 % and 0,65±0.30 %, and there was also not a statistically significant difference. 2. There were positive correlations between blood COHb and calculated COHb with expiratory air in both the smoker (r=0.91, p=0.0001) and non-smoker (r=0.73, p=0.0001). 3. In the smoker, the factors affected COHb were total smoking index (Pack × years) and passed time after the last smoking. 4. In the nonsmoker, the parking and driving groups had higher COHb concentration than others (p<0.05). In conclusion, there was no significant difference between indirect COHb concentration with expiratory air using Smokerlyzer and blood COHb concentration and there was a highly significant correlation between indirect and blood COHb concentrations. Therefore indirect COHb concentration with expiratory air is a useful screening method for CO exposure. Author suggest the resection of smoking during at least 90 minutes before measuring COHb concentration in order to exclude smoking effects.

중독한 추체로 증상을 보인 cyclosporine에 의한 뇌증 1예

강정현,곽승근,신현영,김성은,이정호,이정찬,곽상혁,윤환중,조덕연,김삼용,김제,송창준 충남대학교 의과대학 지역사회의학연구소 2000 충남의대잡지 Vol.27 No.1

The use of cyclosporine(CsA), a potent immunosuppressive agent, is associated with numerous side effects. Neurotoxicity was earlier less well known, but with growing experience central nervous system side effects are now reported up to 40% of patients. Among various CsA-induced neurotoxicities, tremor is most common and posterior leukoencephalopathy is well characterized. An encephalopathy presenting with pyramidal weakness, however, seems to be rare and poorly documented. We report here a case of encephalopathy presenting with multiple generalized seizures followed by fluctuating quadriparesis developed a few days after starting CsA and resolved spontaneously after withdrawal of the drug . A 48-year-old woman with aplastic anemia was placed upon immmunosuppressive treatment consisting of antithymocyte globulin(ATG), CsA, and methylprednisolone. Two days after starting the therapy, she developed a generalized seizure. The next day she developed 2 more episodes of seizure and the therapy was stopped. Computed tomogram of the brain was normal. Six days after starting therapy, she developed mild motor weakness and paresthesia of both lower extremities, which progressed to a definite quariparesis confining her to a bed in 3 days. Magnetic resonance imaging(MRI) of the brain revealed asymmetric, bilateral high-signal abnormalites in the subcortical white matter of fronto-temporal areas. After reaching to a maximum with some fluactuation(14 days after starting the therapy) the motor weakness started to be resolved. She was discharged with a almost complete resolution of the weakness 45 days after starting the therapy. Five months later she did well and brain MRI was negative.

EDM 가공 공정에서 세장비 극대화를 위한 미세구멍의 최적가공 조건 결정

정종혁,이현욱,권원태 한국공작기계학회 2009 한국공작기계학회 춘계학술대회논문집 Vol.2009 No.-

Demand of micro holes has been increased fast, especially in the area of inkjet nozzle, micro turbine and optical parts. However, the micro hole with 40㎛ exit diameter and aspect ratio of 10 has yet to be reported. In this study, an endeavor was made to manufacture the micro hole under over 40㎛ exit diameter at stainless steel plate with 40㎛ thickness. To accomplish the goal, the relationship between machining parameters and machined result was identified. It was found that the entrance clearance was proportional to the discharge power, when discharge energy was kept constant and resistance had to be as high as possible at the given condition to minimize the machining time. 40㎛ average diameter of the micro hole with over 10 aspect ratio was achieved under the condition of 60V, 680pF, 500Ω, 1.5㎛ and 1500rpm.

수입각증후군에 의한 급성 복증 1례

정은욱,지삼룡,이영태,박지훈,김동기,제인수,채두근,박성재,박은택,이연재,이상혁,설상영,정정명 白中央醫療院 2005 仁濟醫學 Vol.26 No.1

Afferent loop syndrome is an uncommon complication of a gastrectomy and Billroth Ⅱ reconstruction. It may cause symtoms at any time from the first postoperative day to many years after the gastrectomy. Afferent loop syndrome is characterized by abdominal pain, vomiting and elevation of serum amylase. Thus, it is difficult to differentiate afferent loop syndrome from other cause of acute pancreatitis. However, the history of gastrectomy can be an important clue for diagnosing afferent loop syndrome. We experienced one case of chronic afferent loop syndrome with acute pancreatitis. After appropriate management, the abdominal pain disappeared and serum amylase level decreased. We report this case with a review of relevant literatures.

자세변화에 대한 뇌성마비아동(경직성 양마비)의 손 기능 차이 비교와 제변수와의 상관관계의 연구

정민예,구애련,권혁철 한국전문물리치료학회 1996 한국전문물리치료학회지 Vol.3 No.3

近代建築에 있어서 形態의 對稱性에 關한 硏究

崔武革,權寧煥,金正在,李郁 경북대학교 공과대학 1985 工大硏究誌 Vol.14 No.-

The symmetry has been denied in modern architecture. But the meaning of symmetry in modern architecture should not able to be interpreted by the static symmetry of the past, because the form in modern architecture, based in the zeitgeist, were the pursuit of free formal construction appearing through the use of new material, the priority of function, the need of new style and the concept of time-space. So the purpose of this study is to find out the symmetrical tendency in modern architecture by six kinds of the symmetry in new arithmetic conception:reflection, cyclic, translation, enlargement, spiral, glide symmetry. As a result of analysis, the architectural form of the grand masters in modern architecture is not simply free form but geometrical form of the more complex dynamic symmetry.

고감도 다공질 실리콘 수광 다이오드의 제조 및 특성

설정훈,이정희,이종현,권대혁,신장규 경북대학교 센서기술연구소 1995 센서技術學術大會論文集 Vol.6 No.1

A porous silicon-based photodiode has been fabricated by selective anodization of Si wafer and deposition of ITO(Indium Tin Oxide) as a transparent electrode. PECVD silicon nitride was deposited for the passivation of the device. The fabricated photodiode shows a very high photo-responsivity of 0.73A/W at 800nm wave length and a rise time of about 8ns at 100Ω load resistance. In order to find out the electrical conduction mechanism in the photodiode, metal/porous silicon Schottky diodes have also been fabricated. Their I-V characteristics are similar to those of p-i-n diodes and amorphous silicon diodes, unlike those of conventional Schottky diodes.

3년간 한 대학병원의 말라리아 환자의 임상 분석

권혁중 최신의학사 2000 最新醫學 Vol.43 No.5-6

봉지종류 및 괘대시기가 ‘원황’ 및 ‘화산’ 배 과실의 수확기 품질에 미치는 영향

정억근,이욱용,안영직,이혁재,황용수,천종필 충남대학교 농업과학연구소 2013 농업과학연구 Vol.40 No.2

We tested fruits quality and skin coloration of two pear cultivar ‘Wonhwang’ and ‘Whasan’ produced by bagging with different kinds of paper bags in the Cheonan area, Chungnam Province, Korea. The fruits were bagged at 35, 45, 55 or 65 days after full bloom (DAFB) with 3 kinds of double layer paper bag which consisted of grey color, yellow color and newspaper for outer layer. The great extent of light interruption was observed in grey colored outer paperbag among three kinds of paperbag which showed only 0.46% of lowest light transmittance when compared with 43.7% and 40.0% of yellow paper and newspaper, respectively. The development of skin redness (a*) increased with the delay of bagging time in two pear cultivars. But the fruits treated at 65 DAFB showed uneven coloration and excessive development of redness which represented low fruit external appearance value. Uniform flesh firmness was attained at the fruits bagged with grey outer color paperbag regardless of bagging time, although the fruit quality indices including soluble solids and titratable acidity did not change significantly by using different kind of fruit bags and bagging time in two pear cultivar. Based on our results, it was explained that the grey-colored fruit bag had positive effect on the development of skin coloration without any detrimental effect on fruit quality factors in ‘Wonhwang’ and ‘Whasan’ pears.

비만의 성공적인 관리

권혁중,조성일 건국대학교 의과학연구소 2002 건국의과학학술지 Vol.12 No.-

Obesity is a common health problem in worldwide, and effective management is challenging. Obesity is associated with an increased mortality rate and risk factors such as hypertension, hyperlipidemia and diabetes mellitus. Basic management of overweight and obese patients requires a comprehensive approach involving diet and nutrition, regular physical activity, and behavioral change, with an emphasis on long-term weight management rather than short-term extreme weight reduction. Modification of lifestyle behaviors that contribute to obesity (e.g., inappropriate diet and inactivity) is the cornerstone of management and the best management for long-term weight loss. Behavior modification involves using such techniques as self-monitoring, stimulus control, cognitive restructuring, stress management and social support to systematically alter obesity-related behaviors. Physicians and other health professionals have an important role in promoting preventive measures and encouraging positive lifestyle behaviors, as well as identifying and treating obesity-related comorbidities. Health professionals also have a role in counseling patients about safe and effective weight loss and weight maintenance programs.