기계화학적합금법에 의한 BaO2-TiO2 분말에서 BaTiO3 형성을 위한 열적조건

오상미,김현구,명화남,박경화 한국물리학회 2007 새물리 Vol.54 No.5

BaO$_2$와 TiO$_2$의 분말을 planetary ball mill을 사용하여 기계화학적 합성법으로 제작하였으며, 구조적 열적특성을 조사하기 위해 XRD, SEM, TEM, TG/DTA, FT-IR을 이용하였다. BaO$_2$와 TiO$_2$의 합성물은 90분 밀링 후부터 비정질상과 함께 BaTiO$_3$상이 형성되기 시작하였으며, 600분 밀링 했을 때까지도 Ba(OH)$_2$의 [112]면이 남아있는 것으로 보아 BaTiO$_3$의 결정이 완전히 이루어지지는 않은 것으로 보였다. 90분과 150분 밀링한 합성물을 450 $^\circ$C, 600 $^\circ$C에서 90분 동안 열처리해도 Ba(OH)$_2$가 측정되었으나, 800 $^\circ$C, 30분 이상 열처리한 시료는 BaTiO$_3$의 결정이 완전하게 형성되었음을 알 수 있었다. 그러나 300분 동안 밀링한 합성물은 600 $^\circ$C, 60분간의 열처리 했을 경우에도 BaTiO$_3$가 선명하게 형성됨을 알 수 있었다. 밀링시간에 따른 결정크기는 120분 밀링 후부터는 평균 약 10 $\sim$ 20 nm 정도로 거의 일정한 값에 도달함을 알 수 있다. The formation and the thermal properties of BaTiO$_3$ mixtures obtained from BaO$_2$-TiO$_2$ (anatase) by using a mechanochemical method were investigated by using, XRD, SEM, TEM, TG/DTA, and FT-IR. The BaTiO$_3$ phase from BaO$_2$-anatase appeared after milling for 90 min with an amorphous phase. The crystallinity of the BaTiO$_3$ mixture improved with increasing milling time, but the Ba(OH)$_2$ peak of the [112] plane appeared in the mixture for a milling of 600 min. The Ba(OH)$_2$ peak were observed in powders milled for 90 min and 150 min and annealed to temperatures of 450 $^\circ$C and 600 $^\circ$C for 90 min. However, crystalline of BaTiO$_3$, for which no Ba(OH)$_2$ peak was observed, was formed by thermal annealing at 800 $^\circ$C for 30 min. Also, crystalline BaTiO$_3$ was formed by thermal annealing at a temperature of 600 $^\circ$C for 60 min for the mixture milled for 300 min. The crystallite size after a milling of 120 min reached a steady-state value of about 10 $\sim$ 20 nm.

천식 환자에서의 감정표현불능증

오상미,이흥범,이용철,이양근,정애자 ( Sang Mi Oh,Heung Bum Lee,Yong Chul Lee,Yang Keun Rhee,Ae Ja Jung ) 대한천식알레르기학회 1998 천식 및 알레르기 Vol.18 No.3

Backgmtcnd: Alexithymia refers to a specific disturbance in psychic functioning characterized by difficulties in capacity to verbalize affect and to elaborate fantasies. Although initially described in the context of psychosomatic illness, alexithymic characteristics may be observed in patients with a wide range of medical and psychiatric disorders. Objective .' The present study was to evaluate the relationship between the alexithymia and bronchial asthma, and to compare the results with finding from a group of acute infectious illness subjects. Material und method: Alexithymia was measured with on Korean translation of the TAS-20 (Toronto Alexithymic Scale-20 Korea version) and the Scored Archetypal 9 Test(SAT9). Thirty patients with bronchial asthma and thirty patients with acute infectious illness completed these tests. The SAT9 and the TAS-20K scores were compared in the both group, considering the age, gender, education level, and duration of illness. Resmft: Bronchial asthma patients had significantly higher score of on the TAS-20K and SAT9 compared with those with infectious illness(p<0.05). The two scales correlated in expected direction. Alexithymia was significantly related to education level(SAT9: r=0.335, TAS-20K: r=-0.376, p<0.01) and duration of illness(asthma group, SAT9: r=-0.383, TAS-20K: r=0.288, p<0.05). Conclusion '. Bronchial asthma patients had significantly higher alexithymic scores. This finding suggests that psycliathic consultation may be considered for the management of asthmatic patients with alexithyria.

산초 (Zanthoxylum schnifolium)열매 추출물의 항산화 및 a-Glucosidase 저해 활성

오상미,한웅,왕명현 한국생약학회 2010 생약학회지 Vol.41 No.2

his study was performed to the activity of antioxidant and anti-diabetic from Zanthoxylum schnifolium fruit. The Zanthoxylum schnifolium fruits were extracted with water, 100% methanol, 100% ethanol, 70% methanol and 70% ethanol. The activities of each extracts were measured by antioxidant tests, such as total phenolic contents, total flavonoid contents, hydroxyl radical activity, DPPH radical scavenging activity, reducing power and a-glucosidase inhibition activity assay. The water extract represented the highest activity in the antioxidants properties in vitro, including hydroxyl radical activity, DPPH radical scavenging activity, reducing power. Furthermore, water extract also showed significantly high total phenolic contents but the 100% methanol extract showed high total flavonoid contents estimated as 196.48 mg/mg. The IC50 values for a-glucosidase inhibition activity of the 100% ethanol and 100% methanol extracts were 275.66 mg/mg and 261.44 mg/mg. Our results indicated that the Zanthoxylum schnifolium fruit expected to be useful as antioxidants.

Development of a FRET-based High-Throughput Screening System for the Discovery of Hsp90 Inhibitors

오상미,정영선,김종훈,이한재,고연진,박승범 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.9

A FRET-based high-throughput screening system was developed for the discovery of competitive smallmolecule Hsp90 inhibitors. The biarsenical fluorescein derivative FlAsH and dabcyl-conjugated Hsp90inhibitor GM were employed as the FRET donor and quencher, respectively. The spatial proximity perturbation between FlAsH-labeled Hsp90N and GM-dabcyl upon treatment of a small molecule led to changes in the FRET-induced fluorescence, monitored in a high-throughput fashion.

분무열분해법으로 성장된 BaTiO₃ 박막의 구조와 광학적 특성

오상미,서동주 한국물리학회 2011 New Physics: Sae Mulli Vol.61 No.8

BaTiO₃ films were deposited on glass substrates by using spray pyrolysis. The X-ray diffraction patterns showed that the structure of the BaTiO₃ thin film was cubic with the lattice parameter α。= 4.031Å and hexagonal with the lattice parameter α。=b。= 5.720Å, c。= 13.965Å. The crystal sizes were 8.14~12.21 nm. The surface morphology, the grain size and the grain boundary width of the BaTiO₃ films affected the lattice constant and the optical energy band gap of the samples. The direct band gap and the indirect band gap of BaTiO₃were found to be 3.268~3.520 eV and 3.052~3.158 eV, respectively. The shifts in the optical energy band gaps of as-prepared and post-annealed BaTiO₃are due to changes in the lattice constant and in hte grain size of the samples. BaTiO₃의 박막을 분무열분해법으로 유리기판 위에 성장시켰다. 350~500℃ 에서 성장시킨 박막과 650℃에서후열처리한 박막의 결정구조는 (110)면이 뚜렷하게 성장된 입방구조와(004)면이 뚜렷하게 성장된 육방정계 구조의 혼합 상으로 성장 되었고,결정크기는 약 8.14~12.21nm 이었다. BaTiO₃박막의금속이온의 비는 분무용액 속의 금속이온의 비와 거의 일치하였고,BaTiO₃박막의 표면형태는 육각형 모양의 입자들이 유리기판 위에균일하게 성장되었다. BaTiO₃ 박막의 광학적 투과율은 400~1200nm 영역에서 약 20~80% 이었고, 성장온도에 따른 BaTiO$_3$ 박막의 직접전이광학적 에너지 갭은 3.268 ~3.520 eV, 간접전이 광학적 에너지갭은 3.052~3.158 eV 이었다. 650℃에서 후열처리한BaTiO₃ 박막의 직접 전이 광학적 에너지 갭은 3.313~3.404eV, 간접전이 에너지 갭은 2.992 ~3.086 eV 이었다.

주기성 조혈장애 1례

오상미,김형식,곽재용,임창열 大韓血液學會 1997 大韓血液學會誌 Vol.32 No.3

초등영어 학습 부진아의 기초 리터러시 신장을 위한 슬로리딩 지도 실행연구

오상미,강정진 경인교육대학교 교육연구원 2019 교육논총 Vol.39 No.1

본 연구는 초등학교 3학년 영어 교과 학습 부진학생 1명의 영어 기초 리터러시 능력과 정의적 태도를 신장시키고자 슬로리딩 교수·학습 방법을 적용한 실행연구이다. 선행연구와 학교 프로그램을 분석하여 슬로리딩 교수·학습 프로그램을 개발하였으며, 1차 실행연구 결과 영어 부진학생의 영어 읽기 능력과 참여도가 향상되었다. 그러나 음소인식 및 알파벳 읽기의 어려움으로 여전히 읽는 것에 부담감을 가졌고, 이로 인해 학습 불안감이 많이 나아지지 않았다. 이에 2차 실행연구에서는 영어 전담교사와 연구자와의 성찰과 부진학생과의 상담을 통해, 기초 리터러시 부분, 특히 파닉스 지도를 병행한 슬로리딩과 다양한 읽기 활동을 접목시킨 수정된 슬로리딩 교수·학습방법을 실시하였다. 실시 결과, 부진 학생의 인지적 읽기 능력(알파벳, 대,소문자 인식 및 구별, 읽기 및 쓰기 능력 향상, 단어 연상능력)과 정의적 영역(동기, 흥미, 참여도)이 향상되었다. 또한 자기가 선택한 과제를 전략적으로 활동하는 자기 주도적 모습도 조금씩 나타나는 효과를 가져왔다. This action research aims to investigate the effectiveness of a Slow Reading method in improving English basic literacy and the affective attitudes of one elementary school English underachiever. Based on the literature review and an analysis of the school program, a Slow Reading method was developed. As the result of the first action carried out to the underachiever, his reading skills and participation were improved. But with the difficulties of phonemic awareness and reading the alphabet, the underachiever had still difficulty in reading and learning anxiety. Through interaction between the English teacher, the researcher, and the student, the Slow Reading method was modified to focus on phonics instruction and various slow reading strategies. As the result of the second action, the underachiever improved his cognitive reading abilities (alphabet recognition, phonemic awareness, reading and writing ability, and word association ability), and affective attitudes(motivation, interest, and participation). In addition, his self-directed learning ability of using his own strategy in dealing with some tasks has appeared.

IMIPENEM/CILASTATIN(TIENAM)의 임상적 연구

오상미,염정필,곽재용,임창열,이양근 의과학연구소 1997 全北醫大論文集 Vol.21 No.2

The rapid institution of broad-spectrum antibiotics in febrile neutropenic patients has clearly been shown to limit infectious morbidity and mortality. Imipenem is the first representative of the new thienamycin class of antibiotics. It has an extremely broad antimicrobial spectrum that includes most of the gram-negative and gram-positive organisms that commonly cause infections in neutropenic patients. We have evaluated imipenem as initial therapy for febrile patients with neutropenia and also as secondary therapy in patients failing to respond to other antimicrobial regimen. Clinical response rate was 75%. No serious side effects were noted in any patients. In conclusion, imipenem/cilastatin is a safe and effective antibiotics as monotherapy in febrile granulocytopenic patients.

폐에 발생한 가성 림프종 1예

오상미,이길홍,신경덕,이용철,이양근 대한결핵 및 호흡기학회 1996 대한결핵 및 호흡기학회 추계학술대회 초록집 Vol.83 No.0

고등학교 물리Ⅰ의 시각자료 비교 분석

오상미,서동주,박현주 한국물리학회 2010 새물리 Vol.60 No.8

The purpose of this study was to investigate the following visual (non-text) materials in highschool physics-Ⅰ textbooks: the proportion of visual materials to total pages of text (as measured by the number of pages devoted to each), the types and functions of the visual materials, and the ratio of male to females in the visual materials. The proportion of visual materials to total pages of text averaged 25.09 % in 5 kinds of high-school physics-Ⅰ textbooks, and the result showed an even distribution of visual materials in each chapter of the physics-Ⅰ textbooks. Among the types of visual materials, the ratio of pictures and diagrams to total text was the highest while the ratio of cartoons and graphs was relatively low. Among the functions, such as experiments,student motivation, information provision, reference and experimental results contained in physics-Ⅰ textbooks. The visual materials were used mostly to explain of physical concepts. The ratio of males to females represented in the visual materials was about 2.39 : 1.03. 본 연구에서는 고등학교 물리Ⅰ 교과서에서 시각자료의 비중과 시각자료의종류와 기능, 그리고 탐구활동에서의 남녀의 성비를 조사하였다. 연구대상은 고등학교 물리I 교과서 5종이었다. 고등학교 물리Ⅰ 교과서에실린 삽화의 비율은 5종 교과서에서 전체 페이지의 면적에 대한 삽화의면적 비율의 평균이 25.09 % 이었다. 3 종의 교과서에서는 평균과 거의일치하게 조사되었지만, 삽화의 비율에서 교과서별 차이는 약 10.69%이었다. 단원별 삽화의 비율은 모든 교과서에서 I 단원은 25.303%, Ⅱ단원은 24.243 %, Ⅲ 단원은 25.460 %로 고르게 분포하였다. 삽화종류를 분석한 결과, 연구대상의 모든 교과서에서 사진과 도해의 비율이가장 많고, 만화와 도표의 비율이 상대적으로 낮았다. 삽화의 기능 분석결과, 학습설명이 가장 많고 실험안내, 동기유발, 자료제공, 참고,실험결과의 순으로 제시되었다. 삽화에 제시된 남성과 여성의 비율분석의 결과, 남성과 여성의 평균 비율은 2.39 : 1.03으로 남성의 수가2배 이상으로 많았다.