학술발표회초록 ( 재료 (2) ) : γ - Alumina 의 합성조건이 그 물성에 미치는 영향

백은주(Eun Joo Baek),남영우(Young Woo Nam) 한국화학공학회 1993 춘계학술발표회 Vol.- No.-

일차성 호중구성 반흔성 탈모의 임상 및 조직학적 소견에 대한 비교 연구

백은주 ( Eun Joo Baek ),형진혁 ( Jin Hyeok Hyeong ),박은주 ( Eun Joo Park ),김광중 ( Kwang Joong Kim ),김광호 ( Kwang Ho Kim ) 대한피부과학회 2022 대한피부과학회지 Vol.60 No.3

Background: Folliculitis decalvans and dissecting cellulitis are types of primary neutrophilic cicatricial alopecia characterized by permanent hair loss. Clinicopathological differentiation is poorly described in literature. Objective: This study aimed to determine the clinicopathological distinction between folliculitis decalvans and dissecting cellulitis. Methods: A retrospective review was conducted in 45 patients diagnosed with dissecting cellulitis and folliculitis decalvans between 2011 and 2021. We reviewed the clinical features using electronic medical records, clinical photographs, and histopathologic features. Results: Clinically, middle-aged men with folliculitis decalvans showed polytrichia (80%) and papulopustules (55%), while young men with dissecting cellulitis had deeply seated nodules (84%). Histopathologically, follicular plugging was more frequently observed in dissecting cellulitis (80%) than in folliculitis decalvans (50%). There was a difference in the depth of inflammation between the two types. Conclusion: A difference in clinical manifestations was observed according to the depth of inflammation. These findings may contribute to the differential diagnosis of primary neutrophilic cicatricial alopecia. (Korean J Dermatol 2022;60(3):167∼172)

퀘쳐스 전처리와 질량분석기를 이용한 유기농 자재 중 259 성분 농약 다성분 분석법 검증

백은주 ( Eun Joo Baek ),박혜진 ( Hyejin Park ),임채욱 ( Chaiuk Lim ),유혜림 ( Hyerim Yu ),이한솔 ( Han Sol Lee ),박소희 ( Sohee Park ),신병곤 ( Byeunggon Shin ),이성훈 ( Seong Hun Lee ),홍성희 ( Sung-hee Hong ) 한국환경농학회 2023 한국환경농학회 학술대회집 Vol.2023 No.0

Organic farming materials are used to preserve the environment and grow agricultural products organically. In Korea, organic synthetic pesticides must not be detected in organic farming materials for soil amendments and biopesticides. So, proper management of the organic farming materials must be preceded. It is necessary to establish an analytical method to accurately and reliably analyze residual pesticides in organic farming materials with various properties such as extracts, oil, and so on. In this study, a QuEChERS method for simultaneous determination of 259 pesticide residues organic farming materials was validated. Organic farming material samples were extracted with acetonitrile and QuEChERS EN buffer.. And then targeted pesticides were purified with the dispersive solid phase extraction(d-SPE, PSA) and detected by gas chromatography-tandem mass spectrometry (GC-MS/MS). To evaluate performance of the method, validation experiments were carried out on five types of organic farming material at three spiking levels (0.05, 0.25, 0.5 mg kg^-1). The recoveries of the organic farming materials ranged between 70 and 120.0% with associated relative standard deviations (RSD) less than 22% for most pesticides. The limit of quantification (LOQ) of methods were below 0.05 mg/kg^-1, and the coefficient of determination (R²) of matrix-matched standards were > 0.98. In order for the developed method to be certified as an analytical method determined by the head of NAQs, cross-validation of the three labs is in progress.

수지점액낭종 환자에서 유형 및 치료 반응에 대한 후향적 연구

정준우 ( Joon Woo Jung ),홍은혜 ( Eun Hye Hong ),백은주 ( Eun Joo Baek ),박은주 ( Eun Joo Park ),김광중 ( Kwang Joong Kim ),김광호 ( Kwang Ho Kim ) 대한피부과학회 2021 대한피부과학회지 Vol.59 No.10

Background: Digital mucous cysts (DMCs) are benign, occurring mainly on the fingers but rarely on the toes. Although the exact cause of DMC has not been identified, it is classified into two different types based on its pathogenesis and location. Surgical and nonsurgical procedures, including aspiration, sclerotherapy, steroid injection, cryotherapy, and CO2 laser, can be used to treat DMC. Objective: This study aimed to compare treatment response based on DMC type and evaluate its efficacy in surgical and nonsurgical (sclerotherapy) treatments. Methods: We retrospectively reviewed the electronic medical records of patients with DMC who visited our dermatology department between January 2010 and November 2020. Results: This study enrolled 39 patients having a mean age of 59.2 years. The proportion of female patients (21/39, 53.8%) was more than male (18/39, 46.2%). The DMC occurrence was more frequent in the fingers (32/39, 82.1%), especially in the index and middle fingers than in the toes (7/39, 17.9%). In sclerotherapy, DMC in the distal interphalangeal joint (DIPJ) required more treatment than that in the proximal nail fold (PNF) (p<0.05). The number of treatments using sclerotherapy was higher compared to that of surgical treatments (p<0.05). Conclusion: The DIPJ type of DMC patients was more difficult to treat using sclerotherapy than the PNF type. Moreover, surgical treatment has a better response than sclerotherapy. (Korean J Dermatol 2021;59(10):742∼748)

교실수업 상황에서 학생 창의성을 촉진하는 교수·학습 특성 탐색

조연순(Cho, Younsoon),정혜영(Chung, Hye Young),백은주(Baek, Eun Joo),최규리(Choi, Kyoulee),임현화(Lim, Hyunhwa) 한국교육방법학회 2011 교육방법연구 Vol.23 No.3

본 연구의 목적은 학생들이 창의성을 나타내는 일반 수업의 교수·학습 과정에는 어떤 특징이 나타나는지 탐색하여 창의성 촉진을 위한 교수·학습 방법의 시사점을 찾는 것이다. 본 연구는 질적 사례연구 방법을 활용하여 초등학교 세 곳의 14학급에서 저·중·고학년의 사회과·과학과 수업을 집중 관찰하였다. 연구 결과, 수업에 따라 다소 차이는 있지만, 도입 부분에서는 배울 주제가 무엇인지 발견하도록 하였고, 전개 부분에서는 학생들의 생각을 통해 지식을 탐색하고 내면화하도록 하였으며, 마무리 단계에서는 새로운 문제를 제시하면서 내면화된 지식을 적용할 수 있는 기회를 주었다. 이 모든 단계의 공통점은 실생활 맥락 제공, 학생들의 호기심과 흥미 유지, 지식의 발견 및 촉진, 비판적·확산적 사고 촉진이었으며, 모든 단계에서 교사의 발문이 중요하게 작용하였다. 창의성이 가장 많이 나타났던 수업은 전체 차시가 단절되지 않고 하나로 연결되어 있으며, 학생들이 직접 체험할 수 있는 자료와 활동을 다양하게 제시하였다. 따라서 이러한 점들은 창의성 촉진을 위해 일반적인 교수·학습에서 고려해야할 중요한 요소로 간주되어야 함을 시사한다. The purpose of the study was to explore the characteristics of teaching-learning processes that creativity emerges and find the implications for the teaching-learning methods to promote students' creativity in regular instructions at schools. To fulfill the research purpose, the qualitative case study method has implemented; observation of social studies and science instructions of the 14 classrooms including lower, middle, and higher grades in three elementary schools. The research findings were as follows. First, the characteristics of teaching-learning processes were differed in the beginning, development, and concluding stages. In the beginning stage, the teachers provided students various familiar materials to find the theme of the lesson rather than providing it directly. In the development stage, the teachers tried to let the students explore the concepts (knowledge) and internalize it. Then in the concluding stage, the teachers provided new situations which the students could apply (externalize) the internalized knowledge. The common factors found in all of the three stages were; 1) providing the contexts of authentic situations, 2) keeping the students' curiosity and interests, 3) promoting students to discover new knowledge, and 4) facilitating critical and divergent thinking. Also in all of the three processes, questions raised by teacher were critical to nurture creativity. These factors found in the study should be considered if the teachers want to facilitate students' creativity in regular subject matter teaching.

학생들의 창의성이 발현되는 수업 맥락에서의 상호작용 특성

조연순 ( Youn Soon Cho ),정혜영 ( Hye Young Chung ),최규리 ( Kyou Lee Choi ),백은주 ( Eun Joo Baek ),정지은 ( Ji Eun Jeong ) 한국초등교육학회 2011 초등교육연구 Vol.24 No.4

본 논문은 학생들의 창의성이 발현되는 학교수엽 맥락에서 나타나는 교실 상호작용 유형과 특성을 탐색하고자 세 초등학교에서 교사 13명의 14학급 수엽을 4개월에 걸쳐 관찰·분석하였다. 연구 결과, 학생 창의성이 발현되는 수업장면은 교사주도와 학생주도의 상호작용으로 구분되었다. 본 연구에서 가장 많이 발견된 창의성 촉진 상호작용 형태는 교사주도였으며, 사고의 정교화를 촉진하는 질의응답과 점진적 이해를 촉진하는 설명을 통해 학생 창의성이 발현되게 하였다. 학생주도 상호작용의 경우에는 학생 간 토론을 통해 비판적 사고가 발현되었고, 모둠별 의사소통을 통해 협동적 산출물을 생성함으로서 학생 창의성이 발현되었다. 따라서 학교에서는 어떤 특정 시간이나 특별한 교육방법이 필요하다기 보다는 일반 수업에서 나타나는 교사와 학생 그리고 학생과 학생 간의 상호작용을 통해 학생 창의성을 촉진시킬 수 있다는 결론을 내릴 수 있었다. 이를 바탕으로 일반 수업에서 창의성을 촉진시킬 수 있는 연구가 더욱 활성화 되어야 할 것을 제언하였다. The purpose of the study was to explore the characteristics of teacher-students` interactions in the teaching and learning contexts where creativity emerges. For the research, 3 elementary schools were selected, and the 14 classes of the recommended 13 teachers of the sites were observed and analyzed with the use of the qualitative research methods. The findings were as follows: First, the most frequently observed interaction which creativity emerges in the teaching and learning processes was teacher`s open-ended question and student`s response followed by the teacher`s sustained feedback. And the interaction could be categorized as two types: teacher-initiated and student-initiated. In the teacher-initiated interaction, teachers promoted students` divergent thinking and facilitated students` progressive understanding through teacher-guided questions and students` responses. In the student-initiated interaction, students experienced critical thinking processes through group discussion with classmates, and created collaborative products and/ or outputs while having active communication in groups. The study suggested that the understanding of how both types of the interactions could facilitate students` creativity was required prior to apply special programs, methods or techniques in school classrooms.

퀘쳐스 전처리와 질량분석기를 이용한 유기농업자재 중 LC 대상 270 성분 농약 다성분 분석법 검증

박소희 ( Sohee Park ),박혜진 ( Hyejin Park ),임채욱 ( Chaiuk Lim ),유혜림 ( Hyerim Yu ),이한솔 ( Han Sol Lee ),백은주 ( Eun Joo Baek ),신병곤 ( Byeunggon Shin ),이성훈 ( Seong Hun Lee ),홍성희 ( Sung-hee Hong ) 한국환경농학회 2023 한국환경농학회 학술대회집 Vol.2023 No.0

Organic synthetic pesticides must not be detected in organic farming materials, so proper management must be preceded. This study was conducted to accurately and quickly analyze pesticide residues in organic farming materials. The simultaneous determination of 270 pesticides in organic farming materials was validated using the QuEChERS extraction and liquid chromatography-tandem mass spectrometry (LC-MS/MS). Organic farming materials with various properties such as co-extracts, oils were extracted with acetonitrile and QuEChERS EN buffer. And then, the organic farming materials were purified with the dispersive solid phase extraction (d-SPE, PSA) and detected by LC-MS/MS. To evaluate the validity of the method, recovery tests were performed on five types of organic farming materials at three spiking levels (0.05, 0.25, 0.5 mg/kg^-1). The recoveries ranged between 70% and 120% with associated relative standard deviations(RSD) less than 22%. The limit of quantification (LOQ) of methods were below 0.05 mg/kg^-1, and the coefficient of determination (R2) was more than 0.98 at matrix-matched calibration curves. Most of the compounds met the criteria. In order for the developed method to be certified as an analytical method determined by the head of NAQs, cross-validation of the three labs is in progress.

알루미늄 알콕사이드 전구체로부터 합성된 감마 알루미나의 합성조건이 그 물성에 미치는 영향

남영우,백은주 한국화학공학회 1994 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.32 No.3

알루미늄 알콕사이드를 합성하고 이를 sol-gel법으로 가수분해시켜 얻은 알루미늄 수화물을 소성하여 감마 알루미나를 제조하였다. 알루미늄 알콕사이드 합성시 알코올의 종류를 변화시키므로서 알킬기가 감마알루미나의 물성에 미치는 영향을 관찰하였으며, 알루미늄 알콕사이드의 가수분해시 희석제인 벤젠과 물의 사용량, 해리제인 염산의 함량을 변화시키므로써 이들 가수분해조건이 감마알루미나의 비표면적과 세공부피에 미치는 영향을 조사하였다. Al-alkoxides were prepared and hydrolyzed by sol-gel method to get Al-hydroxides. Al-hydroxides were calcined to form γ-alumina. The effects of alkyl groups of Al-alkoxide prepared from different alcohols on the properties of γ-alumina were observed. The effect of hydrolysis conditions on the specific surface area and pore volume of γ-alumina were examined with varing the contents of benzene, water and HCl.

여대생의 결혼관에 관한 연구

강신미,김욱련,김이화,김현주,백은주 효성여자대학교 가정대학 학도호국단 1985 家政大論集 Vol.4 No.-

In these days, Korea has undergone various changes in every social aspect throughthe process of modernization. Especially in instituional and actual aspects, the family.and marriage have been changed greatly by the rapid urbanization and iudustrializatton,.and these changes have been investigated scientifically. This paper presents marital consciousness and actual behavior of 300 woman collegestudents in Daegu, and was surveyed comparing various parts-the humanities, natural·science and the arts. As for the basic attitude of marriage, they were positive in the need of marriage,,defined marriage as the second starting point of life. Also they put the aim of marriage,on mental value. As for the dating and purity before marriage, 84 percent of respondents assented tothe dating before marriage. And they thought it proper that the duration of datingwas one year to two years. The age of the first dating and the standard of sex moralstore significant. The part of the arts tended to be open, and the part of natural sciencewere conservative. As for the standard of spouse's choice, 84 percent of respondents wanted to have theright of priority they could choose their spouses for themselves. And they thought it·proper that the age of marriage was 25-year-old to 26-year-old, and the gap of maritalage was one year to three years. Ideal spouse's characteristic, home surroundings, and marital harmony were significant. Among various marital conditions, personality tended to to emphasized, and theatmosphere of family and masculine appearance were taken serious. As for a. spouses's job, professor or research occupation was popular. Compared withthe part of the arts, the part of the humanities and natural science were positive inpredicting marital harmony. Among various marital conditions, an only son, the eldest son, and an offspring ofa concubine tended to be evaded. The type of an ideal spouse was companionship.