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이정희,장홍진,구교진,김옥규,현창택,김양현 대한건축학회 2004 대한건축학회 학술발표대회 논문집 - 계획계/구조계 Vol.24 No.1
Since, korean government introduced Construction Management system by the law in 1997, only a few public construction projects have been adopted the system Nevertheless there are many laws which are related in public construction projects, Construction Management is positively carried out by non-government. About the activation plan of Construction Management questionnaire was inquired by experts in construction. The purpose of this study is to give a solution by finding out the problem of the laws, reconstructions remodelings.
The Effect of Potassium Hydroxide on the Porosity of Phenol Resin-based Activated Carbon Fiber
Jin, Hang-Kyo Korean Carbon Society 2006 Carbon Letters Vol.7 No.3
Activated carbon fiber could be prepared at 973 K by catalytic activation using potassium hydroxide. Phenol resin fiber (Kynol) was impregnated with potassium hydroxide ethanol solution, carbonized and activated at 973 K, resulting in activated carbon fibers with different porosities. The potassium hydroxide accelerated the activation of the fiber catalytically to form narrow micropore preferentially in carbon dioxide atmosphere. The narrow micropore volume of 0.3~0.4 cc/g, total pore volume of 0.3~0.8 cc/g, mean pore width of 0.5~0.7 nm was obtained in the range of 20~50% burnoff.
Difference of Pinch Strength According to Testing Posture and Various Flexion Degree of Elbow Joint
Hang Eun Lee,Jin Kyu Yang,Jin Hee Son,Bo Young Hwang,Mun Kyo Kim,Mi Suk Ha,Jae Heon Kim 국제물리치료학회 2010 Journal of International Academy of Physical Ther Vol.1 No.2
The purpose of this study was to determine the difference of the pinch strength according to testing posture(standing and sitting) and elbow flexion degree(0。, 45。, 90。and 135。). Forty normal young adults(male: 20, female: 20, mean age: 22.68±2.91 years) participated in this study. The methods of this study were categorized as follows: 1) One set of measurement was performed on four elbow flexion degrees(0。, 45。, 90。and 135。) in two testing postures(standing and sitting) and all subjects were measured for 3 sets testing procedures in every experimental sessions. 2) Pinch strength in various elbow flexion degree was measured after 2 min rest time, and then each test set was repeatedly performed with 5 min rest time to prevent fatigue of muscles involved in the elbow joint. The result was obtained as follow: 1) In standing posture, there was statistically significant difference at 0。and 45。, 0。and 90。, 0。and 135。, 45。and 90。, 45。and 135。, 90。and 135。. 2) In sitting posture, there was statistically significant difference at 0。and 45。, 0。and 90。, 0。and 135。, 45。and 90。, 45。and 135。, 90。and 135。. 3) Statistically, there was no significant difference between standing and sitting posture in same elbow flexion degree, however pinch strength in standing posture was higher than sitting posture.
The Effect of Potassium Hydroxide on the Porosity of Phenol Resin-based Activated Carbon Fiber
Hang-Kyo Jin 한국탄소학회 2006 Carbon Letters Vol.7 No.3
Activated carbon fiber could be prepared at 973 K by catalytic activation using potassium hydroxide. Phenol resin fiber (Kynol) was impregnated with potassium hydroxide ethanol solution, carbonized and activated at 973 K, resulting in activated carbon fibers with different porosities. The potassium hydroxide accelerated the activation of the fiber catalytically to form narrow micropore preferentially in carbon dioxide atmosphere. The narrow micropore volume of 0.3~0.4 cc/g, total pore volume of 0.3~0.8 cc/g, mean pore width of 0.5~0.7 nm was obtained in the range of 20~50% burnoff.
진항교(Hang-Kyo Jin),이정민(Jung-Min Lee),유승곤(Seung-Kon Ryu) 한국진공학회(ASCT) 1993 Applied Science and Convergence Technology Vol.2 No.4
비표면적이 다양한 피치계 활성탄소섬유에 질소와 이산화탄소를 흡착시켜 분석하여 기공특성을 고찰하였다. 질소 등온흡착선은 전형적인 Type 1이었고 이산화탄소 등온흡착선은 위로 볼록한 곡선이었다. 비표면적이 증가할 때 BET 상수, C는 감소하였고 협미세기공부피 (narrow micropore volume)은 비슷하였으나 평균기공직경, 기공크기 분포의 폭, 광미세기공부피(wide micropore volume), 총미세기공부피(total micropore volume), 총기공부피(total pore volume), 외부표면적(external surface area)는 증가하였다. 전체기공부피 중 미세기공부피는 97% 이상으로서 활성탄보다 미세기공이 잘 발달되어 있었다. The adsorption of nitrogen (77K) and carbon dioxide(273K) was performed on a series of activated carbon fiber. The adsorption isotherm of nitrogen was typical type 1 and that of carbon dioxide was convex. As the specific surface area increases, there are linear increases in BET constant C, mean pore diameter, the width of pore size distribution, wide micropore volume, total micropore volume, total pore volume and external surface area, however, narrow micropore volume was nearly constant. The total micropore volume fraction in total pore volume is above 97%.
인산 농도와 활성화 온도가 활성탄의 기공 구조에 미치는 영향
진항교,최정일,이정민,정순용 한국공업화학회 2002 응용화학 Vol.6 No.1
In this study, activated carbon was made by chemical activation process using phosphoric acid. The effects of activation temperature and phosphoric acid concentration on the pore structure of activated carbon were investigated. Activation temperature was 400 ~ 800℃ and phosphoric acid concentration was 40~60 wt%. At the activation temperature of 600℃, specific surface area and total pore volume show minimum and external surface area shows maximum. As the concentration of phosphoric acid becomes stronger, the activation temperature which shows maximum external surface area becomes lower.
진항교,정순용 한국공업화학회 2002 응용화학 Vol.6 No.1
Hydrogen adsorption on activated carbons are studied below atmospheric pressure. Adsorption isotherm was measured by volumetric analysis at 298 K and 77 K. The precursor of activated carbons are coconut shell, oak, and bituminous coal. In this work, the hydrogen adsorption capacity reached about 1.7 wt% at liquid nitrogen temperature and atmospheric pressure.
MUC Expression in Gallbladder Epithelial Tissues in Cholesterol-Associated Gallbladder Disease
( Kyo-sang Yoo ),( Ho Soon Choi ),( Dae Won Jun ),( Hang Lak Lee ),( Oh Young Lee ),( Byung Chul Yoon ),( Kyeong Geun Lee ),( Seung Sam Paik ),( Yong Seok Kim ),( Jin Lee ) 대한간학회 2016 Gut and Liver Vol.10 No.5
Background/Aims: Gallstone pathogenesis is linked to mucin hypersecretion and bacterial infection. Several mucin genes have been identified in gallbladder epithelial cells (GBECs). We investigated MUC expression in cholesterolassociated gallbladder disease and evaluated the relationship between mucin and bacterial infection. Methods: The present study involved 20 patients with cholesterol stones with cholecystitis, five with cholesterol stones with cholesterolosis, six with cholesterol polyps, two with gallbladder cancer, and six controls. Canine GBECs treated with lipopolysaccharide were also studied. MUC3, MUC5AC, MUC5B, and MUC6 antibodies were used for dot/slot immunoblotting and immunohistochemical studies of the gallbladder epithelial tissues, canine GBECs, and bile. Reverse-transcription polymerase chain reaction was performed to evaluate MUC3 and MUC5B expression. Results: MUC3, MUC5AC, MUC5B, and MUC6 were expressed in the normal gallbladder epithelium, and of those, MUC3 and MUC5B exhibited the highest expression levels. Greatly increased levels of MUC3 and MUC5B expression were observed in the cholesterol stone group, and slightly increased levels were observed in the cholesterol polyp group; MUC3 and MUC5B mRNA was also upregulated in those groups. Canine GBECs treated with lipopolysaccharide also showed upregulation of MUC3 and MUC5B. Conclusions: The mucin genes with the highest expression levels in gallbladder tissue in cholesterol-associated diseases were MUC3 and MUC5B. Cholesterol stones and gallbladder infections were associated with increased MUC3 and MUC5B expression. (Gut Liver 2016;10:851-858)