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Sodium cloxacillin의 유기용매(有機溶媒)에 의한 결정화(結晶化) 및 안정성(安定性)에 관한 연구(硏究)
백우현,김정우,봉득환 대한약학회 1978 약학회지 Vol.22 No.1
The method that changes sodium cloxacillin from amorphous form to hydrate form was investigated. Using organic solvents of which dielectric constants are greater than 9, the amorphous sodium cloxacillin could be changed to hydrate form. The difference of water content of sodium cloxacillin hydrate caused the differences of ir spectrum at $3,350~3,360cm_{-1}$, and owing to the decrease of water content, hydrate form was changed to the morphous form, which could be identified by x-ray diffraction pattern. Regarding the stability of sodium cloxacillin in activity, the hydrate form was stable but the amorphous form was very unstable. Moreover, the stable hydrate form was scarcely hygroscopic, while the other form was hygroscopic, becoming a fused state ar $50^{\circ}$. and R.H. 50%.
미술활동중심 놀이치료가 이혼가정의 학령기아동 자아개념에 미치는 효과
백우현,이경하 한국아동심리재활학회 2016 놀이치료연구 Vol.20 No.1
This study tried to investigate the effects of art activities centered play therapy on the self-conception of school-age children of divorced families targeting school-age families that was reported as the highest ratio of divorced families. This study, as a single case study, conducted art activities centered play therapy program once a week for 50 minutes throughout a total of 12 sessions for four months, and its contents and results were analyzed in-depth quantitatively and qualitatively through the tests of a self-conception and a projected picture. In addition, activities by session were analyzed qualitatively centering on a self-conception. This study reported that art activities centered play therapy has the positive effect on the improvement of a self-conception of school-age children of divorced families. 본 연구는 이혼가정 중에서도 가장 높은 비율이 보고되는 학령기가정을 대상으로 미술활동중심 놀이치료가 이혼가정 학령기아동의 자아개념에 미치는 효과를 알아보고자 하였다. 본 연구는 단일 사례연구로서 주 1회, 50분씩, 총 12회기에 걸쳐 미술활동중심 놀이치료 프로그램을 4개월 동안 실시하고 그 내용과 결과를 자아개념검사와 투사그림검사를 통해 양적, 질적으로 심층 분석하였다. 또한 회기별 활동을 자아개념을 중심으로 질적 분석하였다. 본 연구는 미술활동 중심 놀이치료가 이혼가정 학령기아동의 자아개념 향상에 긍정적 효과가 있음을 보고하였다.
Gentamicin Sulfate의 형광분석법에 관한 연구
백우현,김정우,허명권,박근창 대한약학회 1978 약학회지 Vol.22 No.1
Gentamicin sulfate reacted with pyridoxal and zinc (II) ion in pyridine-methanol solution to yield highly fluorescent zinc(II) chelates of N-pyridoxylidene derivatives. This fluorescence reaction was sensitive and showed excitation maximum at 398nm, and emission maximum at 482nm. The effects of reagent concentration, reaction time and temperature, standing time and temperature were studied. And a new fluorophotometric method for the determination of gentamicin sulfate was developed. A good result was obtained and this method was applied to various preparations.