SD Rats를 이용 1-hexene의 흡입독성 연구

김현영,임철홍,정용현,이권섭,이성배,이준연,한정희,전윤석,이용묵 한국환경독성학회 2001 환경독성보건학회지 Vol.16 No.4

The purpose of this study was to investigate the acute (4 hours) and repeated-dose (6 hours a day, 5 days a week, 4 weeks) toxic effects of I -hexene on Sprague- Dawley (SD) rats which were treated by inhalation. The results were as follows; I. The median lethal concentration (LC_(50)) was estimated 52,694 ppm (confidence limit 95%; 49,494~55,447 ppm) in acute inhalation. Abnormal clinical signs related to the l-Hexene were not observed with the acute inhalation dose. Gross findings of necropsy revealed on evidence of specific toxicity related to the 1-hexene, II. By repeated inhalation exposure the body weight of male were more or less reduced by the dose of 2,500 ppm and 5,000 ppm compared with control group. However there were no significant variation hematology and blood biochemistry for the exposed rats compared with the control rats. Abnormal clinical signs and gross findings of necropsy related to the 1-hexene were not shown. In conclusion when we exposed I-hexene to SD rats for 4 weeks, 5 days per week, 6 hours per day, the Lowest observed effect level (LOEL) was over 2,500 ppm and Non observed effect level (NOEL) was below 500 ppm.

췌장염에 의한 가성낭종내에 생긴 가성동맥류 : 1례 보고

오연희,이채경,김승현,이성우,양창현,이정호,이영현 동국대학교 경주대학 1996 東國論集 Vol.15 No.-

만성 췌장염의 합병증으로 생긴 가성동맥류는 드문질환으로, 반복적으로 다량의 출혈을 일으킬 수 있으며, 치료를 하지 않을 경우 사망율이 높기 때문에, 조기 진단과 치료가 필수적이다. 저자들은 38세 남자 환자에서 췌장염의 합병증으로 생긴 가성낭종내에서 발생한 가성동맥류 1예를 경험하였기에 보고하는 바이다. 가성 동맥류의 색혈류도플러상 낭종내에 양방향 흐름의 와류를 볼 수 있었다. Pancreatic Pseudoaneurysm within Pseudocyst from Pancreatitis: 1 Case Department of Diagnostic Radiology and Internal Medicine, College of Medicine,DongGuk University Yeon Hee OH M.D., Chae Kyeong Lee M.D., Seoung Hyeon Kim M.D., Sung Woo Lee M.D., Chang Heon Yang M.D., Jung Ho Lee M.D., Young Hyun Lee M.D. Pseudoaneurysm from pancreatitis is uncommon, but it can cause recurrent and massive hemorrhage. Because of high morbidity and mortality, early detection and treatment of the pseudoaneurysm is needed. We report a case of pseudoaneurysm within pseudocyst from pancreatitis. Color-flow Doppler sonography shows bidirectional flow and turbulent arterial flow, within anechoic mass.

알렉시딘과 차아염소산나트륨의 화학적 상호반응 후 mass spectrometry를 이용한 파라클로로아닐린의검출 분석

김현식,한승현,오소람,임상민,구유,금기연 大韓齒科保存學會 2010 Restorative Dentistry & Endodontics Vol.35 No.4

근관세척제인 NaOCl과 CHX를 병행 사용하는 경우 적갈색의 발암물질로 알려진 PCA가 생성된다. 본 연구의 목적은 CHX와 유사한 buigunide 계통의 소독제 인 ALX을 NaOCl 과 흔합 반응 시 PCA가 생성되 는지 여부를 mass spectrometry를 이용하여 평가하고자 하였다. 대조군으로는 4% NaOCl 용액과 2% CHX의 혼합용액, 0.5%PCA 용액, 및 1%ALX 용액을 사용하였고 실험군으로는 5가지 농도(1%, 0.5%, 0.25%, 0.125%, 0.0625%)의 ALX 용액과 4% NaOCl의 흔합용액을 질량분석기를 이용하여 mole-cular peak를 분석한 결과 ALX과 NaOCl의 혼합물에서는 PCA(m/w=128)로 보이는 128 피크가 관찰되지 않았다. 또한 용액의 색 변화에서도 ALX이 농도가 높을수록 열은 노랑색을 띄었으나 농도가 낮아질수록 흰색으로 관찰되었으며 어떠한 침전물의 형성도 보이지 않았다. Recent studies demonstrated that the combination of chlorhexidine (CHX) and sodium hypochlorite (NaOCl) resulted in the formation of a precipitate, para-chloroaniline (PCA). Alexdidine (ALX) is a kind of biguanides like CHX, and has stronger detoxification effect against the bacterial virulence factors such as lipoteichoic acid and lipopolysacchardide compared with CHX. The purpose of this study was to determine whether PCA was formed after chemical interaction between ALX and NaOCl using mass spectrometry. Mass spectrometry was performed for the mixture of five different concentrations of ALX (1, 0.5, 0.25, 0.125, 0.0625%) and 4% NaOCl. Results showed that the peak of PCA was not detected in mixed solu tions of ALX and NaOCl in mass spectrometry analysis. The color of mixed solution of ALX and NaOCl after chemical interaction was light yellow to white, but there wasn't any precipitate found.

고속 전철 Catenary/Pantograph계의 동특성 해석

최연선,정대현 成均館大學校 科學技術硏究所 1990 論文集 Vol.41 No.2

The vibrations in Catenary/Pantograph system should be avoided to assure the power collection in High-Speed train. Contacts between pantograph and trolley wire depend on various design parameters. To select good design parameters, analytical and numerical simulation were performed for a simplified model. The dynamic characteristics of tensioned wire subject to moving force was calculated using Laplace transform. And, a simulation program was developed to calculate the displacement of trolley wire using Euler method. The numerical results showed good agreements between two methods.

Morgagni 탈장 : 1례 보고

오연희,이창욱,김승현,이성우,정병욱,이준희,박동일,권영무,신현종 동국대학교 경주대학 1996 東國論集 Vol.15 No.-

Morgagni 탈장은 횡격막의 전내측 부위의 발달이상으로 열공을 통하여 장관이나 대망과 같은 복강내 구조물이 흉곽내로 빠져나가는 드문 질환으로 알려져 있다. 저자들은 호흡곤란을 주소로 내원하여 방사선학적 검사와 수술로 확진된 1례를 보고한다. Morgagni hernia is improperly located abdominal viscera into the thoracic cavity through the foramen of Morgagni which is a congenital defect at the anterornedial portion of diaphragm. We report a case of Morgagni hernia diagnosed by radiologic examination and operation.

항암화학요법을 받는 암 환자에 대한 Nucare^R의 영양지지효과

조덕연,김현수,곽상혁,강정현,김철희,배광봉,김종숙,박상준,윤환중,김삼용 충남대학교 의과대학 지역사회의학연구소 1997 충남의대잡지 Vol.24 No.1

Purpose : The purpose of this study was to evaluate the effect of nutritional support with enteral liquid supplement in cancer patients receving chemotherapy for possible benefit in nutritional, immunologic and golbal function of patients. Patients and Methods : From October 1995 to February 1997, 30 advanced cancer patients receving chemotherapy were divided two roups. The Nycare group, in addition to normal diet, Nucare^R enteral supplement was given for 1week right after chemotherapy for the duration of 2 chemotherapy cycles. Control group received only normal diet without parenteral fluid supplement for 2 chemotherapy cycles. Results : Median ages were 53 end 56 years for Nucare group and Contrl group respectively. Performance scores was less than 2 by ECOG scale. All patients were stage Ⅲ or Ⅳ. The physical parameters, such as weight, arm muscle circumference(AMC) and triceps skin fold(TSF) were decreased in both groups after 2 cycles of anticancer therapy. but it was less severe in Nucare group(p<0.05). Serum transferrin was maintained in mild deficit state in Nucare group, whereas it aggravated form mild to moderate deficit in Control group(p<0.05). Serum albumin level increased in Nucare group without statistical significance. but it decreased from normal to mild deficit in Control group. Serum total protein did not change significantly in Nucare group. but in Control group, serum total protein was decreased from 7.24±0.9 to 6.52±0.5(P<0.05). Total lymphocyte count did not change significantly in both groups. Conclusion : This study shows that the nutritional support with Nucare^R was effective in the prevention of nutritional deficit status in patients receving a nticancer chemotherapy.

임베디드 보드를 이용한 미아 위치 정보 시스템

이현태,이구연 江原大學校 産業技術硏究所 2009 産業技術硏究 Vol.29 No.B

In this paper, we implement a place information system for missing children using embedded board. In the implementation, the embedded board receives location information from GPS satellites, parsing GGA information which includes current time and location coordinates from the satellite information and sends them to the location management server. The server locates a missing child using the location information from embedded board together with server database. We implement an application program for the system. The program shows current location of a child and its moving path and browses the corresponding map from coordinates mapping.

난소 및 난소 종양 염전의 초음파 소견

오연희,이현경,이원재,이성우,박수성,윤혜원,임문환,심재철,김용탁,김성숙,김정란 동국대학교 경주대학 1993 東國論集 Vol.12 No.-

Acute torsion of the ovary and ovarian mass is a recognized surgical emergency, but rarely has the diagnosis been made preoperatively on the basis of imaging studies. The sonographic findings in 14 cases of surgically proven torsion of the ovary and ovarian mass are described. Mostly cystic ovarian mass, engorged vessel, dilated uterine tube, beak-like echo(torsion site), smooth mass wall thickening an free-fluid collection in cul-de-sac are described. More significant in terms of specificity were the demonstration in 6 cases(42.9%) of the smooth mass wall thickening and in 8 cases(57.1%) of a free fluid in the cul-de-sac. We report the sonographic findings of ovary and ovarian mass torsion that may suggest the preoperative diagnosis of this condition.

자연의 아름다움과 고급스러움이 공존하는 마임 비에타 쇼룸 제안 -오감 (시각, 청각, 후각, 촉각, 미각)을 중심으로-

김보현,이서연,은다솜,엄연정,이진민,장미정,이성애 숙명여자대학교 산업디자인연구소 2017 숙명디자인학 연구 Vol.24 No.-

본 연구는 국내 브랜드 ‘마임'의 뷰티와 연계한 뷰티 쇼룸을 제안함에 있어서 공간속에 오감을 담아내는 일련의 프로세스를 밝히는데 목적이 있다. 이는 브랜드가 소유하고 있는 다양한 감각과 가치가 결여된 채 시각적 요소만이 담긴 브랜드 뷰티 쇼룸이 대다수를 차지하는 오늘날, 이에 대한 문제를 해결하기 위해 ’융합 연출 디자인'적 시점에서 폭넓게 바라보고 브랜드의 정신과 오감의 결합을 통해 이를 해결하고자 하였다. 이에 본 연구는 2017년 3월~6월 15주간 숙명여대 환경디자인학과 <융합연출 디자인>수업에서 진행된 수업의 결과물로서 산학 연계된 화장품 브랜드의 쇼룸디자인 개발 프로세스를 제안한다. 또한 본 연구의 범위는 오감을 담고 있는 뷰티 쇼룸(4D)이 되기까지의 과정 전체로 한다. 그 결과, 마임 뷰티쇼룸은 공간 디자인과 오감을 융합하여 영상에서 공간에 이르기까지 오감의 조화와 브랜드의 정신을 녹여내고 확장시켰다. 끝으로 본 연구는 뷰티 쇼룸 공간 디자인을 제안함에 있어서 오감을 활용하여 통합된 시점에서 그래픽·제품·공간을 개발 및 제시한 것에 의의가 있다. 또한 향후 이와 관련된 쇼룸 공간 개발에 있어서 기초 자료로 활용될 것으로 기대된다.

이방성 담낭(Bicameral Gallbladder) : 1례 보고

이현경,오연희,김승현,이성우,안우섭 동국대학교 경주대학 1996 東國論集 Vol.15 No.-

담낭의 선천성 기형 중 이방성 담낭은 매우 드문 기형으로 저자들은 우상복부 동통을 주소로 내원하여 초음파, 전산화 단층 촬영, 간담도 스캔 검사에서 이방성 담낭으로 진단되고 수술로 확진된 이방성 담낭(Bicameral GB) 1례를 경험하였기에 문헌 고찰과 함께 보고 하고자 한다. The bicameral gallbladder is one of the rarest congenital malformation of the gallbladder. A 26 years-old male was examined for the colicky pain in right upper quadrant area. On sonographic examination the lumen of gallbladder was partitioned, nearly completely, into two chamber(fundal and ductal) that are of approximately equal size. There was gallbladder wall thickening with cholelithiasis in the fundal chamber. Surgical finding showed bicameral gallbladder divided into two camber of same size and gallbladder wall thickening with cholelithiasis in the fundal chamber.