가축분뇨를 이용한 미생물연료전지의 농화배양 단계에서 미생물 군집 변화

장재경(Jae Kyung Jang),홍선화(Sun Hwa Hong),유영선(Youg Sun Ryou),이은영(Eun Young Lee),장인섭(In Seop Chang),강연구(Youn Koo Kang),김종구(Jong Goo Kim) 大韓環境工學會 2013 대한환경공학회지 Vol.35 No.12

이 연구는 전기화학적 활성을 갖는 미생물들을 알아내기 위하여 농화배양 단계에서 시간에 따라 미생물연료전지의 미생물 군집 변화를 알아본 것이다. 접종원으로 하수처리장 혐기 소화액와 가축분뇨를 1 : 1로 혼합한 액을 사용하였다. 농화 배양 과정에서 미생물 생장곡선에 따라 지체기, 대수성장기 그리고 정지기로 전류발생 패턴을 보면서 구분하였다. 전류가 안 정적으로 발생되는 시점을 농화배양이 끝난 시점으로 판단하였으며, 이때 전류는 0.84 ± 0.06 mA가 발생되었다. 농화배양이 되어 가는 과정에서 미생물군집 변화를 전기영동(DGGE)에서 확인하여 시간에 따라 새롭게 나타나는 band나 농도가 높아지는 band 17개를 잘라내어 염기서열을 분석하였다. 이 결과 지체기와 대수성장 단계에서는 Clostridium, Rhodocyclaceae, Bacteriodete 그리고 Uncultured bacterium 등이 검출되었고, 정지기에서는 Geobacter sp., Rhodocyclaceae, Candidatus, Nitrospira, Flavobactriaceae, 그리고 Uncultured bacterium 등이 검출되었다. Geobactor의 경우는 이미 전기활성 미생물로 알려져 있는 미생물 종으로 이를 포함하여 이 연구에서 검출된 다른 미생물들 중에도 전기활성이 있는 미생물을 포함하고 있을 것으로 판단된다. These studies were attempted to investigate the change of microbial community of anode of microbial fuel cell using swine wastewater in the enrichment step with the lapse of time. Microbial fuel cells enriched by a 1 : 1 mixture of anaerobic digestive juices of the sewage treatment plant and livestock wastewater. Enrichment culture step was divided into three stages to indentify the microorganisms. It was separated by each lag phase, exponential phase, and stationary phase. These steps were determined by the change of the current value. The current after enrichment was generated about 0.84 ± 0.06 mA. We were cut out the different 17 bands in the DGGE fingerprint gel to do sequencing. The bands which the concentration was increasing or newly appearing with the lapse of time were included for this study. In the lag and exponential phase, Clostridium, Rhodocyclaceae, Bacteriodetes, and Uncultured bacterium etc. were detected. There were in the stationary phase Geobacter sp., Rhodocyclaceae, Candidatus, Nitrospira, Flavobactriaceae and uncultured bacterium etc. Geobactor among microorganisms detected in this study is known as the Electrochemically active microorganisms. It may include electrochemically active microorganisms to be considered as electrical activity microorganisms.

지역아동센터 이용 아동·청소년의 문화프로그램 몰입이 진로인식 및 진로발달에 미치는 영향 - 사회적지지에 의해 조절된 자기효능감의 매개효과

장선화,Jang, Sun-Hwa 한국디지털정책학회 2021 디지털융복합연구 Vol.19 No.4

The purpose of this study was to examine the mediating effect of self-efficacy moderated by social support in the influence of local children's center cultural program commitment on career awareness and development of children and adolescents using Local Children Centers' Services. For this purpose, the questionnaires of local children's center cultural program commitment, career awareness and development, social support, and self-efficacy was conducted to 190 elementary school students in the 3rd grade and middle and high school in 22 children's centers in N city. The statistical packages were SPSS PC+ 25.0 and SPSS MACRO. The main results are as follows: First, cultural program commitment had positive correlation with self-efficacy, social support, career awareness and career development. Also, self-efficacy had a positive correlation with social support, career awareness and career development, and social support had a positive correlation with career awareness and career development. Second, the hypothesis model was supported that cultural program commitment positively affects career awareness mediated by self-efficacy moderated by social support. In other words, the more they participated and commited in cultural programs, the more self-efficacy increased leading to more career awareness. Also, the more social support was felt, the more the positive influence of cultural program commitment on self-efficacy increased. The hypothesis model was supported that cultural program commitment positively affects career development mediated by self-efficacy moderated by social support. In other words, the more they participated and commited in cultural programs, the more self-efficacy increased leading to more career development. Also, the more social support was felt, the more positive influence of cultural program commitment on self-efficacy increased. The limitation and future tasks were discussed. 본 연구는 취약계층 아동·청소년이 이용하는 지역아동센터 문화프로그램 몰입이 진로인식과 진로발달에 주는 영향을 사회적 지지에 의해 조절된 자기효능감의 매개효과를 검증하고자 하였다. N시 지역아동센터 22개소에 다니는 190명의 아동청소년을 대상으로 문화프로그램 몰입, 진로인식, 진로발달, 사회적 지지와 자기효능감에 관한 설문조사를 실시하였다. 본 연구의 통계처리를 위해 SPSS PC+ 25.0의 SPSS MACRO가 사용되었다. 본 연구결과 첫째, 문화프로그램 몰입은 자기효능감, 사회적지지, 진로인식, 진로발달과 정적 상관관계가 있었다. 둘째, 문화프로그램 몰입이 자기효능감을 매개로 진로인식과 진로발달에 영향을 주며, 문화프로그램 몰입이 진로인식과 진로발달에 주는 영향을 매개하는 자기효능감을 사회적지지가 조절하는 것이 검증되었다. 지역아동센터에 다니는 아동·청소년이 지각하는 사회적 지지가 높을수록 자기효능감의 매개효과가 커지고, 문화프로그램몰입이 진로인식과 진로발달에 주는 긍정적 영향이 촉진된다고 할 수 있다. 본 연구의 한계점과 향후 연구과제가 논의되었다.

신생아에서 급성 복증으로 발현된 Meckel 게실 1예

임재영,장선화,조재민,고경혁,박은실,서지현,박찬후,우향옥,윤희상,Lim, Jae Young,Jang, Sun Hwa,Cho, Jae Min,Ko, Gyung Hyuck,Park, Eun Sil,Seo, Ji Hyun,Park, Chan Hoo,Woo, Hyang Ok,Youn, Hee Shang 대한소아소화기영양학회 2005 Pediatric gastroenterology, hepatology & nutrition Vol.8 No.2

출생 후 건강하게 지내던 중 생후 9일째 급성 복증 및 장 폐쇄의 증상으로 내원한 남아에서 시험적 개복술 시행하여, Meckel 게실 천공과 장 유착을 발견하고 수술적으로 제거한 후 회복된 증례이다. 병리 소견상 경한 게실 염과 정상 장 점막 소견을 보여 자발적 Meckel 게실 천공이라고 추정 되는 증례이다. 신생아시기에 자발적 Meckel 게실 천공은 매우 드물지만 심각한 질환이다. 따라서 신생아 시기에 급성 복증 증상을 보일 때 반드시 감별 진단 목록에 Meckel 게실을 포함시켜야만 한다. Meckel's diverticulum is generally acknowledged to be the most prevalent congenital anomaly of the gastrointestinal tract. The preoperative diagnosis of Meckel's diverticulum is difficult, especially in neonates, because of the lesions ability to masquerade as one of a variety of much more common abdominal pathologies. Recently we experienced a case of perforated Meckel's diverticulum with mild inflammatory reaction, intestinal adhesion, and small bowel obstruction in a previous healthy 9-day-old neonate. The spontaneous perforation of Meckel's diverticulum in neonate is very rare but serious entity. The course was rapid and progressed to sepsis. So despite its varied presentation, Meckel's diverticulum should be kept in mind as a cause of acute abdomen in neonates.

유아의 장독립성 - 장의존성 인지양식에 따른 사회, 인지적 놀이형태에 관한 연구

조부경(Boo Kyung Cho),장선화(Sun Hwa Jang) 한국아동학회 1995 아동학회지 Vol.16 No.1

The purpose of this study was to investigate differences in social play, cognitive play, and social-cognitive play patterns as related to young children`s field independence-dependence cognitive styles. Sixteen field independent and sixteen field dependent children were selected from a group of 79 young children with the use of Preschool Embedded Figures Test(PEFT). Their social play, cognitive play, and social-cognitive play patterns were observed. The data collected for this study were analyzed by using SPSS/PC^+; frequency, percentage and χ² test. The results of this study were that (1) difference of social play patterns as related to young children`s field independence-dependence cognitive styles was not found, (2) differences were found in cognitive play patterns as related to young children`s field independence-dependence cognitive styles, and (3) differences were found in social-cognitive play pattern as related to young children`s field independence-dependence cognitive styles.

지역 산업기술지형의 변화 양태와 시사점

임영훈(Younghun Lim),김형주(Hyung Joo Kim),양현채(Hyeon Chae Yang),고병옥(Byeong Ock Go),최지영(Ji Young Choi),장선화(Sun Hwa Jang) 과학기술정책연구원 2017 정책연구 Vol.- No.-

As a result of pursuing regional industrial policies based on balanced and specialized development, there is no contradiction in the positive aspects of the expansion of local industry and innovation bases. But others have questioned the effectiveness and validity of the policies. In the context of the demand for re-establishing regional industrial policies or re-establishing the direction, it is necessary to thoroughly examine and reflect on various points of view in order to prevent distortions in policy evaluation and lead to careful decisions. Therefore, this study analyzes the structure of regional technical knowledges represented by patents in a multifaceted way, especially related to the regional industrial policies. This is intended to escape from the old point of view to evaluate regional industrial policies with quantitative economic indicators such as sales, employment and production. This study utilizes patents as a representative indicator for observing regional industrial technology topography. Based on analyzing the linkage, transformation and network between IPC(International Patent Classification) and KSIC(Korean Standard Industrial Classification), This study examine the relationship between industrial technology topography and strategic industries in case regions. The case regions are Jeollabuk-do and Gangwon-do. The data utilized are registered patents from 2000 to 2016. Chapter 2 examines literature on regional innovation system, regional industrial policy and patent-based regional industrial technology topography. Chapter 3 outlines the process and status of regional industrial policies. Chapter 4 and 5, which correspond to the core analysis part of this study, deal with the analysis of three parts on the changing patterns of industrial technology topography in Jeollabuk-do and Gangwon-do, respectively. More specifically, three parts are as follows. ① The structure and connection characteristics of the regional technical knowledge structure. ② Major trends in regional technical knowledge structure change. ③ the characteristics of industrial linkages and element technology linkages. Chapter 6 diagnose the relevance between regional technical knowledge bases and strategic industries. Finally, chapter 7 suggests comprehensive conclusions and policy implications. This study found that it is reasonable to accept that regional industrial policies in Korea for about 20 years have produced positive effects on regional industrial and innovative capacity establishment. Of course, it can be denied from the old point of view to evaluate regional industrial policies with quantitative economic indicators. But we have to examine the meaning, value and effects of regional industrial policies in various aspects, before evaluating, re-establishing, sustaining or abolishing the policies. In this sense, the study presents a qualitative analysis and policy implications from different angle different from the major economic or quantitative ones. In short, despite the limitation of study that should be improved in the future, this study provides some meaningful results and suggestions for the regional industrial policy. Of course, this study is a pilot one to evaluate, diagnose, discuss the meaning, value, effects of existing regional industrial policy in Korea. The key contribution is the positioning of strategic industries of case regions to a two-dimensional matrix, consisted of an industrial policy aspect axis and a science & technology policy aspect axis. As a result, we suggest that strategic directions of regional industrial policy should be different according to the characteristics of strategic industries, regional industrial bases and technical knowledge ones. To obtain more effective conclusions, subsequent studies are needed.

유아 교육을 위한 그림 자료 검색 편집 프로그램의 개발

장선화,선섭희,이명재 한국컴퓨터교육학회 2000 컴퓨터교육학회 논문지 Vol.3 No.1

In children education, it takes a much time for teachers to prepare teaching materials and tools. Most teaching materials and tools consist of pictures so that children may easily understand the contents of a study. If instructors free from laborious work for preparing these materials, they can provide children with better education by focusing more creative works. In this study, we manufactured many picture data which are used in children education, and developed a program that is used by teachers for the purpose of utilizing these pictures according to study topics. This program provides a feature that easily search more than 3700 pictures according to subjects and areas, and also provides various editing facilities such as expanding, reducing pictures and writing statements.