Preparation and thermal properties of new poly(enaryloxynitriles) = 새로운 poly(enaryloxynitriles)의 합성과 그 열적 성질

김병구배장순공명선Kim, Byung-GuBae, Jang-SoonGong, Myoung-Seon 檀國大學校 基礎科學硏究所 1995 論文集 Vol.7 No.-

새로운 Poly ( enaryloxynitriles ) 의 합성과 그 열적 성질

김병구,배장순,공명선 ( Byung Gu Kim,Jang Soon Bae,Myoung Seon Gong ) 한국공업화학회 1995 공업화학 Vol.6 No.4

주쇄에 다양한 화학 구조를 가진 새로운 poly(enaryloxynitriles)을 p-bis(1-chloro-2,2-dicyanovinyl)benzene (2)과 sulfide, sulfone, azo, acetal, imide, ether 그리고 ester 결합을 포함한 디 페놀 유도체의 나트륨 염과 계면중합에 의하여 합성하였다. 생성된 중합체는 고유 점도가 0.12∼0.45 dL/g이었으며 중량 평균 분자량은 9000∼12000이었다. 그들 중합체는 극성 반양자성 용매에 매우 잘 녹았으며 alkyl, acetal, ester를 가진 diphenol로부터 합성된 중합체는 THF나 aceton에도 매우 잘 녹았다. 그러나 중합체의 DMF 용액으로 부터 용매 증발후 단단하고 부서지시 쉬운 막이 형성되었다. 중합체들은 350℃에서 열경화 반응이 진행되어 불용성 물질이 형성되었다. 거의 모든 중합체가 350∼450℃사이에서 10% 중량 감량을 유지하였으며, 500℃에서 잔사량은 70∼85%로서 열안정성을 보여주었다. New poly(enaryloxynitriles) with a variety of chemical structure in the main chain were prepared by interfacial polymerization of p-bis(1-chloro-2,2-dicyanovinyl) benzene (2) with disodium salts of diphenol derivatives containing sulfide, sulfone, azo, acetal, imide, ether and ester group. The resulting polymers possess inherent viscosities of 0.12∼0.45 dL/g and Mw in the range 9000∼12000. They are easily soluble in polar aprotic solvents. The polymers derived from diphenols with alkyl, acetal and ester units were even soluble in common organic solvents such as THF and acetone. Brittle and hard films can be cast from DMF solutions. These polymers show a large exotherm in differnetial scanning calorimetry and undergo a curing reaction around 350℃ to form insoluble materials. Almost all the poly (enaryloxynitriles) retained a 10% weight loss being recorded between 350∼450℃ in nitrogen and displayed 70∼85% residual weight at 500℃.

한.IAEA 협력 50주년과 Coming Nuclear Renaissance "그래도 원자력이다"

김병구,Kim, Byeong-Gu 한국원자력산업회의 2007 원자력산업 Vol.27 No.8

질병-돼지의 가성광견병 근절지침(1)

김병구,Kim, Byeong-Gu 대한양돈협회 1986 養豚 Vol.8 No.4

Clinical Significance of Intraventricular Hemorrhage in Patients with Ruptured Aneurysms

김병구,Hack-Gun Bae,윤석만,윤일규,심재준,Sung-Ho Kim 대한뇌혈관외과학회 2010 Journal of Cerebrovascular and Endovascular Neuros Vol.12 No.2

Objective : The purpose of this study was to determine the clinical significance of intraventricular hemorrhage (IVH) in patients with ruptured aneurysms. Methods : Of 1034 patients who were admitted to our hospital with ruptured aneurysms between 1994 and 2007, 128 (12.4%) had IVHs. The clinical, radiologic characteristics, and surgical outcomes in the IVH group were compared with the no-IVH group. Results : The IVH group had a shorter time interval to admission. The incidence of IVH was significantly higher in patients > 70 years of age (p=0.021), males (p=0.000), alcohol abusers (p=0.039), patients with a Glagow Coma Scale (GCS) 8 (p=0.000), and patients with a Hunt and Hess grade of 4-5 (p=0.000). IVH was more common in patients with ruptured posterior circulation aneurysms (p=0.000) and anterior communicating artery aneurysms (p=0.036). The incidence of thick, diffuse subarachnoid hemorrhage (SAH; p=0.004), intracerebral hemorrhage (ICH) >10 cc (p=0.006), rebleeding (p=0.010), and shunt-dependant hydrocephalus (p=0.000) was significantly higher in the IVH group than the no-IVH group. The mortality rate in the IVH group was significantly higher than the no-IVH group (48.4% versus 22.1%). The amount of IVH had an influence on the mortality; IVH involving all of the ventricles (59.7%) and IVH only involving some of the ventricles (33.9%) was associated with a 6.6- and 2.3-fold higher mortality than the no-IVH group, respectively. IVH was significantly associated with a poor surgical outcome; however, this association was not significant in patients with a GCS 8, or histories of rebleeding or seizures. Conclusions : In patients with ruptured aneurysms, IVH reflects the clinical severity of SAH. IVH has a negative influence on surgical outcome, except in patients with a poor clinical status pre-operatively. (Kor J Cerebrovascular Surgery 12(2):61-69, 2010) Objective : The purpose of this study was to determine the clinical significance of intraventricular hemorrhage (IVH) in patients with ruptured aneurysms. Methods : Of 1034 patients who were admitted to our hospital with ruptured aneurysms between 1994 and 2007, 128 (12.4%) had IVHs. The clinical, radiologic characteristics, and surgical outcomes in the IVH group were compared with the no-IVH group. Results : The IVH group had a shorter time interval to admission. The incidence of IVH was significantly higher in patients > 70 years of age (p=0.021), males (p=0.000), alcohol abusers (p=0.039), patients with a Glagow Coma Scale (GCS) 8 (p=0.000), and patients with a Hunt and Hess grade of 4-5 (p=0.000). IVH was more common in patients with ruptured posterior circulation aneurysms (p=0.000) and anterior communicating artery aneurysms (p=0.036). The incidence of thick, diffuse subarachnoid hemorrhage (SAH; p=0.004), intracerebral hemorrhage (ICH) >10 cc (p=0.006), rebleeding (p=0.010), and shunt-dependant hydrocephalus (p=0.000) was significantly higher in the IVH group than the no-IVH group. The mortality rate in the IVH group was significantly higher than the no-IVH group (48.4% versus 22.1%). The amount of IVH had an influence on the mortality; IVH involving all of the ventricles (59.7%) and IVH only involving some of the ventricles (33.9%) was associated with a 6.6- and 2.3-fold higher mortality than the no-IVH group, respectively. IVH was significantly associated with a poor surgical outcome; however, this association was not significant in patients with a GCS 8, or histories of rebleeding or seizures. Conclusions : In patients with ruptured aneurysms, IVH reflects the clinical severity of SAH. IVH has a negative influence on surgical outcome, except in patients with a poor clinical status pre-operatively. (Kor J Cerebrovascular Surgery 12(2):61-69, 2010)

Adsorption Behavior of Primary amine on Activated carbon Rayon-fiber Surfaces as Induced by Oxygen Functional Complexes

김병구,신해근,서정규,이문용,지상운,Kim, Byeoung-Ku,Shin, Hae-Geun,Seo, Jung-Kyu,Lee, Moon-Young,Ji, Sang-Un The Korean Society of Tobacco Science 2009 한국연초학회지 Vol.31 No.1

Activated carbon fiber (ACF) was surface modified by nitric acid to improve the adsorption efficiency of the propylamine. Functional groups and textural properties of modified ACF were investigated. The total surface acidity increased about 7 times to that of as-received ACF by modification with 1 M nitric acid solution, carboxylic and phenolic groups mainly increased. However, the specific surface areas and the total pore volumes of the modified ACFs were decreased by 5-8% due to the increased blocking (or demolition) of micropores in the presence of newly introduced complexes. Despite the decrease of textural properties, it was found that the amount of propylamine adsorbed by the modified ACFs was increased by approximately 17%. The oxygen and nitrogen contents on the modified ACF increased by 1.5 and 3 times compared with the as-received ACF. From the XPS results, it was observed that propylamine reacted with strong or weak acidic groups, such as -COOH or -OH on the ACF surfaces, resulting in the formation of pyrrolic-, pyridonic- or pyridine-like structures.

원전 기자재의 국산화 대책

김병구,Kim, Byeong-Gu 한국과학기술단체총연합회 1981 과학과 기술 Vol.14 No.8

하드웨어 기반의 고성능 침입탐지 기술

김병구,윤승용,오진태,장종수,Kim, B.K,,Yoon, S.Y.,Oh, J.T.,Jang, J.S. 한국전자통신연구원 2007 전자통신동향분석 Vol.22 No.1

인터넷의 발전과 더불어 네트워크 상에서의 침입 시도가 갈수록 증가되고 다변화됨으로써, 이에 대한 대응으로 많은 침입탐지시스템들이 개발되었다. 그러나, 현재의 대다수 침입탐지시스템들은 갈수록 증가하는 트래픽양을 처리하는 데 어려움이 있다. 즉, 기가비트 이더넷 환경과 같은 고속 네트워크 환경이 현실화되고 있고, 이를 바탕으로한 대용량의 데이터를 처리할 수 있는 보안 분석 기법들에 대한 필요성이 대두되고 있다. 따라서, 본 논문에서는 고속 네트워크 환경에 적합한 하드웨어 기반의 고성능 침입탐지 기술에 대해서 설명한다. 이는 대용량의 트래픽 데이터들을 실시간으로 분석하기위한 기술로써, 점점 고속화되고 대용량화되어 가는 대규모 네트워크 환경에서의 다양한 침입을 보다 빠르고 정확하게 탐지하고 대응하기 위한 기반을 제공한다.

영양적 측면에서의 우유

김병구,Kim, Byeong-Gu 한국유가공협회 1986 牛乳 Vol.25 No.-

'어린이 건강 우유로 관리하자'

김병구,Kim, Byeong-Gu 한국유가공협회 1990 牛乳 Vol.40 No.-