대구경 현장타설말뚝에 대한 수평재하시험 및 말뚝 깊이별 수평변위분포에 대한 연구

이민희,황근배,정성민,최용규 경성대학교 공학기술연구소 2003 공학기술연구지 Vol.S2 No.1

Most of pile foundations are a condition of fixed head on pile, but lateral loading test of pile have performed to free head on generally This study performed field lateral loading test accompanying lateral displacement by depth of pile for two cases(fixed head and free head) and analyzed lateral behavior of large drilled shaft. Further more compared theoretical equation with result of lateral loading test.

에틸렌 시아노히드린에 의한 실크의 화학적 개질

이근숙,배도규 경북대학교 농업과학기술연구소 2008 慶北大農學誌 Vol.26 No.-

Pad-dry-cure 방식으로 ethylene cyanohydrin을 이용하여 견직물을 acrylonitrile화 시킬때 건조 시간, curing 온도 및 시간, ethylene cyanohydrin처리 농도, ZnCl₂처리 농도 등 조건 변화에 따른 변화와 반응양식을 규명하고자 하였다. 가공된 견직물의 FT-IR과 DSC 분석을 통하여 다음과 같은 결과를 얻었다. Curing을 150 ℃에서 2분, ethylene cyano hydrin 처리농도 5%, ZnCl₂처리농도 0.1%, 건조 온도를 80 ℃로 하여 건조 시간 경과에 따른 견직물의 FT-IR 분석 결과, 건조 시간 경과에 따라 -0H(3,450cm^(-1)) 특성 peak가 전부 장파장 쪽으로 shift 되어 나타 났고, random coil에 의 한 amide peak(1,663cm^(-1))는 단파장 쪽으로 shift되어 β-sheet peak(1,635cm^(-1))와 중복되어 나타났다. 건조를 8℃에서 3분, curing을 110℃에서 2.5분, ZnCl₂농도를 0.1%로 하여 eylene cyanohydhn처리 농도에 따른 가공 견직물의 FT-IR 분석에서 -OH(3,450cm^(-1))특성 peak에서 변화가 나타나 견직물의 -OH기가 반응에 관여하고 있는 것을 알 수 있었다. 위와 같은 조건으로 가공된 견직물의 DSC 분석에서 eylene cyanohydnn처리에 의해 견직물의 열분해 온도는 무처리의 311'C에서 대략 320 "C로 상승하는 것으로 나타났다. 건조를 80'C에서 3분, curing을 110'C에서 2.5분, ethylene cyanohydrin 처리농도 5%로 하여 ZnCl₂처리 농도에 따른 가공 견직물의 FT-IR 분석에서는 촉매 처리농도 0.8%일 경 우를 제외하고는 -OH(3,450cm^(-1))특성 peak에서 대부분 무처리와 비슷한 결과를 보여주고 있으나, 0.8%의 경우에는peak에 큰 변화를 나타냈다. 같은 조건에서 가공된 견직물의 DSC 분석에서, ethylene cyanohydhn 처리에 의해 견직물의 열분해 온도는 촉매농도와는 관계없이 무처리(311'C)에 비해 가공 견직물(대략 320'C)의 열분해 온도가 상승점을 알 수 있었다. 건조를 80 "C에서 70초, eylene cyanohydrm처 리 농도 5%, ZnCl₂처리농도 0.8%, Curing시간을 2.5분으로 하고 curing 온도를 각각 110, 120, 130, 140, 150, 160 ℃로 변화시켜 가공한 견직물의 FT-IR의 분석 결과, curing 온도 110, 150, 160℃에서 -OH특성 peak의 변화가 크게 나타났다. 같은 조건으로 가공한 견직물의 DSC분석에서는 ethylene cyanohydrin 처리에 의한 견직물의 열분해 온도는 curing 온도에 상관없이 미처리구(311℃)에 비해 전부 열분해 온도(대략 320℃)가 상승함을 알 수 있었다. In this paper, when the silk fabric was modified by ethylene cyanohydrine, the reaction mechanism between both was studied at various treatment conditions such as curing temperatures and times, ethylene cyanohydrin concentrations and ZnCl₂concentrations. Through the FT-IR and DSC analyses of the treated silk fabrics, we found the results as follows : It was observed in FT-IR analysis of the treated silk fabrics that the -OH characteristic peak(3,450 cm^(-1))position and shape were all changed when drying and curing treatment conditions were at 80℃ for 3 minute and 110℃ for 2.5 minute, and the concentration of the ZnCl₂ was 0.1%. It indicated that the -OH group of the silk participated in the reaction between the silk fabric and ethylene cyanohydrin . From the DSC analysis, it was found that the pyrolysis temperatures of the treated silk fabrics by ethylene cyanohydrin which was processed in the same condition, were all increased from 311℃ to ab. 320 ℃. From the FT-IR analyses of the silk fabrics treated by ethylene cyanohydrin at the various concentrations of ZnCl₂, it was found that the -OH characteristic peaks(3,450 cm^(-1)) were similar to the nontreated one except that of the fabric treated at the ZnCl₂conconcentration of 0.8% when drying and curing treatment conditions were at 80℃ for 3minute and 110℃ for 2.5 minute, and the concentration of the ethylene cyanohydrin was 5%. In the case of the ZnCl₂ concentration of 0.8% soultion, a lot of change were observed in peak. From the DSC analysis of the treated silk fabrics which was processed in the same condition, it was showed that the pyrolysis temperatures of treated silk fabric were all increased from 311℃ to ab. 320℃, which was no relation with the concentration of ZnCl₂.

중량저항운동이 중년 여성의 면역글로블린에 미치는 영향

이배익,박영수,권만근 한국스포츠리서치 2003 한국 스포츠 리서치 Vol.14 No.2

The purpose of this study was to investigate the effect of 12weeks' resistance training on Immunoglobulin in middle aged women. The subjects of this study employed 20 healthy middle aged women in Pu-san city. The study was conducted two (control group, experimental group) by two (pre-test, post-test) factorial design with data analyzed using ANCOVA. The result of this study was not significantly different in IgA, IgD, IgE, IgG, IgM between control group and training group. Therefore moderate weight traning was not change in Immunoglobulin. the following study is profoundly considerated not only immunoglobulin but also mitogen

단일 쇄석다짐말뚝의 재하시험에 관한 연구

이민희,정성민,황근배,최용규 경성대학교 공학기술연구소 2003 공학기술연구지 Vol.S1 No.1

Among soft ground treatment methods with granular soil used in domestic, the sand compaction pile method has been utilized greatly, but, as a result of exhaustion of sand and increase of unit cost, a necessity of an alternative method is suggested. In this study, the static load tests for crushed-stone compaction piles which were constructed on test field were performed. Based on test results, stress concentration ratios between the crushed-stone compaction pile and the soft ground were investigated and estimated. At laoding pressure, settlement showed the decreasing tendency as replacement rate increases. At replacement rate of 20%, yield pressure was smaller but, at replacement rate of 30% and 40%, settlement and yield pressure were similar. The stress concentration ratio was the range of 1.7 to 3.0 and it was higher as replacement rate was increased more.

재발성 다발연골염 1례

이배혁,고의경,왕수건,전경명 釜算慶南耳鼻咽喉科學會 1994 임상이비인후과 Vol.5 No.1

동결 건조기의 최적 운전 기법

裵信徹,李近熙 단국대학교 1993 論文集 Vol.27 No.-

The problem of operating a freeze dryer to obtain a fixed final moisture content in minimum time is formulated as an optimal control problem. The energy radated from the heat plate, and total pressure in drying chamber are considered as control variables. Constraints are placed on the system state variables by the scorch point of the dried product and the melting point of the frozen interface. The optimum control policy at the beginning of the run, when neither of the two temperature constraints is active, has been establishen through a theoritical analysis under pseudo-steady state assumptions. For certain cases the nature of the overall optimum control policy has been found. The numerical solution of the steady and nonsteady state problem indicates that if a control policy is optimum for the steady state problem, then this control policy is also optimum for the nonsteady state problem.

인체 Calbindin-D9k 항체 제작과 종특이적 활성

이근우, 홍의주, 이근식, Vu-Hoang Dang, 정의배 충북대학교 동물의학연구소 2006 Journal of Biomedical and Translational Research Vol.7 No.2

본문참고

국내육성 오차드그라스 품종들의 캘러스 형성율 및 식물체 재분화 효율

김기용,강경민,배은경,이인애,임용우,최기준,박근제,손대영,조진기 Plant molecular biology and biotechnology research 2003 Plant molecular biology and biotechnology research Vol.2003 No.-

Comparisons of callus formation ratios from seed explants, callus sizes, regeneration ratios from callus and regeneration efficiency for 4 orchardgrass (Dactylis glomerata L.) varieties (Three were developed in Korea and one was imported from foreign nation) are as follows; Jangbeol 102 (67.0%) has the highest callus formation ratio in 4 weeks incubated callus after bedding the seed explants, but Potomac (68.4%) has the highest ratio in 6-seek callus. Potomac (3.93cm) has the highest callus size in 4-week callus, but Jangbeol 101 (4.32cm) has the highest size in 6-week callus. Jangbeol 101 (17.7%) has the highest plant regeneration ratio in 4-week callus, but Potomac (37.4%) has the highest raion in 6-week callus. Jangbeol 102 (11.5%) has the highest plant regeneration efficiency in 4-week callus, but Potomac (25.6%) has the highest efficiency in 6-week callus.

Preparation and characterization of quercetin-loaded polymethyl methacrylate microcapsules using a polyol-in-oil-in-polyol emulsion solvent evaporation method.

Lee, Dong-Hwan,Sim, Gwan-Sub,Kim, Jin-Hwa,Lee, Geun-Soo,Pyo, Hyeong-Bae,Lee, Bum-Chun Pharmaceutical Society of Great Britain 2007 Journal of pharmacy and pharmacology Vol.59 No.12

<P>Flavonoids and related compounds exhibit a wide range of useful pharmacological properties but present challenges related to their stability and solubility in commonly available solvents. In this study, polymethyl methacrylate (PMMA) microcapsules were prepared using a novel polyol-in-oil-in-polyol (P/O/P) emulsion solvent evaporation method as a means of stabilizing the flavonoids, using quercetin as a model flavonoid drug. The morphology of the microcapsules was evaluated using a scanning electron microscope, revealing a spherical shape with a smooth surface. The cross-section image of the PMMA microcapsules prepared with an amphiphilic polymer in the inner polyol phase showed that the microcapsule was filled with several submicron microspheres. The mean diameter varied from 1.03+/-0.12 microm to 2.39+/-0.42 microm, and the encapsulation efficiency ranged from 12.7% to 26.9%. When free quercetin was stored at 42 degrees C, the residual quercetin content gradually decreased to 18% over 28 days as a result of oxidation. However, when encapsulated in PMMA microcapsules with an amphiphilic polymer in the inner polyol phase, the residual quercetin content decreased to just 82%. In-vitro release studies indicated a sustained release pattern throughout the 36-h study. The release kinetics of the microcapsules with an amphiphilic polymer followed a diffusion-controlled mechanism and the microcapsule without amphiphilic polymer followed an anomalous diffusion behaviour. This study suggests that the novel P/O/P emulsion solvent evaporation method can be applied to the encapsulation of flavonoids.</P>

Isolation and characterization of the Citrobacter freundii phage EF1 from earthworm (Eisenia andrei)

Geun Jung,Jung Seok Lee,Hong Jae Shin,Jung Yeol Bae,Ae Rin Lee,Sam woong Kim,Byung Jin Lee,Chi Won Noh,Tae Sung Jung 한국예방수의학회 2016 예방수의학회지 Vol.40 No.4

Earthworms, especially Eisenia andrei, are cultivated for a variety of purposes including waste disposal and compost production. In this study, bacteria from earthworm gut were cultured and the dominant species identified. Subsequently, we isolated bacteriophages able to lyse the isolated gut bacteria. Two dominant genera of gut bacteria, Aeromonas sp. and Citrobacter sp. were identified by using MALDI-TOF MS analysis and a library was constructed to find lytic phages. Phage EF1 showed lytic activity for C. freundii and two Citrobacter isolates, C. braakii and C. murliniae. These 3 species have similar sensitivities to EF1. Several aspects of the life cycle of EF1 were investigated by using C. freundii under optimal growth conditions. EF1 infects C. freundii with a moderate latent period, approximately 25 min, and a large burst size averaging 5 × 10 9 per infected cell. Moreover, the antimicrobial activity of EF1 was well maintained under diverse conditions including a broad temperature range of 40°C to 50°C and a wide pH range of 4 to 11. In conclusion, the results indicate that earthworm casting contain a wide range of bacteria species, for which there are various corresponding bacteriophages