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안명수 ( Myung Su Ahn ),정진영 ( Jin Young Jung ),배기선 ( Ki Sun Bae ) 한국건축시공학회 2013 한국건축시공학회 학술발표대회 논문집 Vol.13 No.2
Many kinds of fire-stop sealants have been used for joint sealing, cable penetration part sealing and fireproof structure finishing etc in building sectors which need water-proofing and fire-stop properties. But, fire-stop sealant itself has no specific industry standards in Korea even though there are so many required properties for the application. So, in this study, for the evaluation, we adopted and applied UL standard 94(UL 94) which is commonly used for the fire retardant testing in inflammable materials like plastics and rubbers in electronics industry. In this study, we demonstrated fire resistance properties of each fire-stop sealants which varied with different formulation, thickness and origins available in Korea. Overall, fire stop sealant had better fire resistance performance than normal construction sealant. And the thicker the material, the better the fire resistance performance was. Because there is no national or industry guideline for fire stop sealant itself, each sealant products showed different level of performances under UL94 desigation. Even certain product had very poor fire proof propeties although it claims it can be used for the application.
창호 시공용 폴리우 폴리우레탄 및 실리콘 실란트 접착성 착성 및 상응성 평가 평가
안명수 ( Myung Su Ahn ),정진영 ( Jin Young Jung ),서연원 ( Yeonwon Seo ),김성현 ( Sung Hyun Kim ),배기선 ( Keesun Bae ) 한국건축시공학회 2014 한국건축시공학회 학술발표대회 논문집 Vol.14 No.2
Using sealant for window installation is sealing the gap between the window frame and outer wall (such as concrete). A sealant serves to prevent external environmental impacts such as moisture, rain, sand, and dust entering inside of the building and make the building durable. In order to fulfill basic jointing function of sealing, at least 6 mm joint gap between two bonding surfaces are required. Also, adhesion performance between sealant and surfaces and the compatibility with other building materials are required to check before installation. In general, 2 part polyurethane sealant and 1 part silicone sealant are most common materials for sealing the joint of window. In this study, adhesion performances of those two generic sealants reflecting actual application conditions and the compatibility evaluations with other building materials are conducted to propose proper window installation procedures.
한영민,이종필,황형식,임대철,송준호,안명수,Han, Young-Min,Lee, Jong-Phil,Hwang, Hyung-Sik,Lim, Dae-Chul,Song, Joon-Ho,Ahn, Myung-Su The Korean Neurosurgical Society 2001 Journal of Korean neurosurgical society Vol.30 No.3
경막정맥동 혈전증은 다양한 원인을 가진 비교적 드문 질환으로 알려져왔으며 임상양상 및 발현형태가 매우 다양하여 임상적 진단이 쉽지 않았다. 그러나 최근에는 여러 영상진단 방법, 특히 자기공명영상 혈관 촬영등을 통해 조기 진단이 가능하게되었다. 치료 방법을 결정할 때, 환자의 임상증상과 정맥순환계의 개인간 차이가 매우 중요한 인자중 하나이다. 저자들은 보존적 치료로 좋은 결과를 얻은 2례의 경막정맥동 환자의 특성을 문헌고찰과 함께 보고하는 바이다. Cerebral dural sinus thrombosis(CDST) has been described as a rare disease with a variety of patho-etiological factors. The diagnosis of CDST is difficult due to various symptoms and signs, none of which is specific to CDST. But timely diagosis is critical for effective management. The introduction and widespread use of computed tomography(CT), magnetic resonance imaging(MRI) and cerebral angiography made early diagnosis of CDST possible. In particular, MR venography is the most useful tool for establishing a correct diagnosis quickly. In early literature, mortality ranked between 30% and 50% but in more recent series it is between 5.5% and 30%. With the advent of diagnostic and therapeutic tools, early diagnosis and proper management has made the prognosis better. The appropriate therapy for CDST, however, has been the subject of much cortroversy. Individual variations of the venous system and collateral vessels are key factors to decide the proper treatment. In this report, we present two cases with symptomatic CDST treated without open surgical or direct endovascular interventions with good outcome.
커튼월 튼월용 2액형 구조용 실란트 혼합비 혼합비별 물성 평가 연구 연구1) 1)
김성현 ( Sung Hyun Kim ),정진영 ( Jin Young Jung ),안명수 ( Myung Su Ahn ),서연원 ( Yeonwon Seo ),배기선 ( Keesun Bae ) 한국건축시공학회 2014 한국건축시공학회 학술발표대회 논문집 Vol.14 No.2
Silicone structural glazing (SSG) is a method utilizing a silicone adhesive to attach glass, metal, or other panel material to the structure of a building. Windload and other impact loads on the facade are transferred from the glass or panel through the silicone structural sealant to the systems systems’’ framework. Silicone structural glazing systems are currently a very common method of glazing throughout the world. Locally, structural silicone glazing has become very common to achieve aesthetically pleasing and high utilization of small land for both residential and commercial building. Although structural silicone glazing has been utilized for approximately thirty years in Korea, the understanding of its technology was low and limited. Consequently, Korean projects experienced many quality issues during assembly and construction, even in very recently finished buildings. Adhesion loss and water infiltration occurred on more than one project, and the time and cost to repair these issues were substantial. In general, there are two kinds of structural silicones depending on fabrication methods. 1part structural silicone is for site glazing system and 2part structural silicone is for unitized factory glazing system. In this paper,2part structural silicone which is very common for factory fabricating curtainwall systems was evaluated with regards to various mixing ratio. Since the structural performance of 2part sealant can be affected by mixing ratios, some extra ranges of recommended mixing ratio were evaluated to see any performance differences. Besides on cure profile, comparative evaluations for mechanical properties and adhesion develop on common building substrates were conducted.
구두 발표 : 구두발표(OC) - 농업화학 및 생태,식품분야 ; 미나리 재배기간 중 Azoxystrobin과 Thiamethoxam의 잔류량 변화
노현호 ( Hyun Ho Noh ),이재윤 ( Jae Yun Lee ),정오석 ( Oh Seok Jeong ),김혜성 ( Hye Sung Kim ),진미지 ( Me Jee Jin ),박소현 ( So Hyun Park ),윤상순 ( Sang Soon Yun ),안명수 ( Myung Soo Ahn ),심석원 ( Seok Won Sim ),경기성 ( Kee Su 한국환경농학회 2013 한국환경농학회 학술대회집 Vol.2013 No.-
미나리 재배기간 중 azoxystrobin과 thiamethoxam의 잔류량 변화를 구명하고 농약의 섭취량을 산출하기 위하여 이 연구를 수행하였다. 포장시험은 청원군 남일면에 위치한 시설재배지에서 수행 하으며, 약제를 7일 간격으로 1회 및 2회 살포한 후 최종 약제 살포 당일부터 15일차까지 시료를 경시적으로 10회 채취하였다. Azoxystrobin과 thiamethoxam의 검출한계(limits of detection, LOD) 는 각각 0.001과 0.01 mg/kg이었으며, 정량한계(limits of qauntiation, LOQ)는 각각 0.004와 0.04 mg/kg이었다. 정량한계의 10배와 50배 수준으로 수행한 회수율은 azoxystrobin과 thiamethoxam 각각 99.7-103.1%와 84.1-92.1%로 양호하였다. 미나리 중 azoxystrobin의 살포당일 1회 및 2회 처 리구에서 잔류량은 각각 4.093과 4.593 mg/kg이었으며, 15일차 잔류량은 1회 및 2회 처리구 각각 0.47과 0.53 mg/kg으로 경시적으로 감소하였다. Thiamethoxam의 경우 살포당일 1회 및 2회 처리 구에서 시험농약의 잔류량은 각각 2.08과 2.43 mg/kg이었으며, 15일차 잔류량은 1회 및 2회 처리 구 모두 검출한계 미만이었다. 일일섭취추정량 대비 일일섭취허용량으로 산출한 시험 농약의 식이 섭취율은 azoxystrobin과 thiamethoxam 모두 0.55% 미만이었다.
올리고당의 Maillard 반응물질의 유지에 대한 항산화효과
안명수,이수미 한국식생활문화학회 1997 韓國食生活文化學會誌 Vol.12 No.2
The purposes of this study were to investigate the Maillard reactions of some oligosaccharides with lysine and the antioxidative effects of the ethanol extracts from their reaction mixtures on the soybean oil. The Maillard reactions were carried out of 2% oligosaccharides such as palatinose (PN), fructooligosaccharide (FO), isomaltooligosaccharide (IMO) with 2% lysine (L) for 24 hours heating at 60, 80, 100℃. The color intensity of Maillard reaction mixtures were determined by UV-VIS spectrophotometer upon reaction time and temperature. And the antioxidative effects on the soybean oil of each ethanol extract from Maillard reaction mixture of each oligosaccharide were measured by peroxide value (POV). POV's of soybean oil including reaction extracts were determined regularly every 2 days during 20 days storaged at 60±1℃. The results were obtained as follows: 1. The color intensity of the Maillard reaction mixtures were raised highly as the browning temperature and time increased. The color intensity of PN·L browning mixture was the highest. The order of high color intensity at 100℃ was PN·L>FO·L>Glu·L>IMO·L. 2. Comparing the antioxidative effect of Maillard reaction product (at 100℃, for 12 hours) of each oligosaccharide to that of BHT and TBHQ, the order of high antioxidative effect was TBHQ>IMO·L>BHT>Glu·L>PN·L>FO·L. 3. From these results, it was known that PN·L shown as high brown color intensity was appeared low antioxidative effect, while IMO·L shown as low brown color intensity was appeared high antioxidative effect. So, it was recognized that there was no relation between brown color intensity and antioxidative effect.
신경학적 이상소견이 없는 두뇌외상 환자에서 Computerized Tomography의 의의
박기용,안명수,성태경 대한신경외과학회 1979 Journal of Korean neurosurgical society Vol.8 No.2
Computerized tomography (CT) has proven to be far superior to other diagnostic studios in the detection of intracranial lesions after head injuries. The procedure is especially appropriate for early and accurate diagnosis because it can be done quickly with no discomfort and minimal risk. CT was utilized as a screening diagnostic procedures in 100 consecutive patients of head injuries who were alert and neurologically no deficits in a 8 month a period. 11 abnormal CT Scans found at 10 patients: six epidural hematomas, two intracerebral hematomas, one subdural hygroma and one temporal contusion. The cases presented are discussed in light of pertinent literature.