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Soonjae Hwang,Min Ho Lee,Sun-Yeong Gwon,Seunghyung Lee,Dongju Jung,Ki-Jong Rhee 대한의생명과학회 2013 Biomedical Science Letters Vol.19 No.2
Enterotoxigenic Bacteroides fragilis (ETBF) causes inflammatory diarrhea in humans and animals and is also implicated in colorectal cancer. ETBF-infected mice exhibit a prominent large intestinal inflammation characterized by neutrophil infiltration and induction of the Th17 response. In this study, we examined differences in the secreted cytokine profile of the cecum and proximal colon of ETBF-infected mice using an antibody array. Of the cytokines examined, we found that the cecal tissues from ETBF-infected mice secreted elevated levels of G-CSF, IL-6, IL-17 and LIX compared to non-toxigenic Bacteroides fragilis (NTBF) and Mock infected mice. The proximal colon tissues from ETBF-infected mice secreted higher levels of G-CSF, IL-6, KC, LIX, MIP-1g and MCP-1. This study demonstrates that the cecum and colon should be considered separately when assays are used to determine immune responsiveness to enteric infections.
Lee, Soonjae,Kim, Nahae,Cho, Seulki,Ryu, Jae-Chun,Cho, Yoon,Park, Jeong-Ann,Lee, Sang-Hyup,Kim, Juyoung,Choi, Jae-Woo Elsevier 2017 European polymer journal Vol.95 No.-
<P><B>Abstract</B></P> <P>In this study, we present new organic–inorganic (O-I) hybrid composite particles and their possible application asan adsorbent for removal of various inorganic heavy metal from aqueous phase. The O-I hybrid nanoparticles were first prepared by copolymerization of (3-aminopropyl) triethoxysilane (APTES) and alkoxysilane-functionalized amphiphilic polymer (APAS) precursors which have hydrophobic polypropylene oxide segment and hydrophilic polyethylene oxide segment at the same backbones where triethoxysilane groups are chemically bonded with hydrophobic segment. The O-I hybrid composite particles consisting of silica nanoparticles chemically interconnected by O-I hybrid nanoparticles were prepared using the 2nd hydrolysis-condensation reaction. The characteristics of the hybrid particle thus developed were confirmed by FT-IR (Fourier transform infrared) spectroscopy, <SUP>29</SUP>Si-NMR (nuclear magnetic resonance) spectroscopy, EA (Elemental analysis), TGA (thermogravimetric analysis), SEM (scanning electron microscopy), and cryo-TEM (cryogenic transmission electron microscopy). The O-I hybrid particles exhibited removal of cations (Ni, Cu, Zn, Cd and Pb) from aqueous solution with a considerably higher sorption capacity for Pb than for other cations. The heavy metal removal occurred instantaneously with pH increase. A step wise application tests were conducted to distinguish between heavy metal precipitation at a high pH and adsorption by the developed material. Cytotoxicity tests demonstrated that the developed adsorbent has a weak cytotoxic effect on four different types of human cells.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Amphiphilic polymer precursor is conjugated onto silica nanoparticles. </LI> <LI> The composite removed various heavy metal ions from aqueous solution. </LI> <LI> The composite is a promising adsorbent for hydrophilic and/or hydrophobic pollutants. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
유아특수교사양성기관의 학교현장실습 관련 국내 연구동향 분석
이순자 ( Lee Soonja ),이정은 ( Lee Chung Eun ) 한국유아특수교육학회 2023 유아특수교육연구 Vol.23 No.3
In the education of pre-service teachers at teacher preparation programs, field-experience is a process that provides direct opportunities to develop competencies and expertises of pre-service teachers. Studies have been conducted to strengthen school field-experiences, however, research related to school field-experiences in Korean early childhood special education programs is still insufficient. Therefore, the current study aimed to explore trends by analyzing Korean studies related to early childhood special education field-experiences. A total of 18 studies were selected as a result of the search without limiting the year and analyzed according to the year of publication, subject, research method, practice institution environment, and research topic. As a result of the analysis, studies were evenly distributed by year, and most studies involved senior pre-school special education teachers in universities. In terms of research method, qualitative and quantitative research appeared at a similar rate, but no experimental research was conducted. In terms of practice environment, kindergarten special classes were the most common, followed by early childhood special schools. Regarding research topics, most studies examined the current status, perceptions, and experiences of pre-service special teachers. However, studies that examined other practicum improvement programs or perceptions of related stakeholders were found to be lacking. Based on the above research results, implications for future studies on field-experience for pre-school special education teachers were suggested.
공공건축의 공간 공유가치를 통한 주민복지 향상에 관한 연구
황순재 ( Soonjae Hwang ),이은영 ( Eunyoung Lee ),이돈일 ( Donil Lee ) 한국공간디자인학회 2018 한국공간디자인학회논문집 Vol.13 No.3
(Background and Purpose) As the culture of value consumption has become a trend, the shared economy has emerged as a megatrend to lead the future. Spatial sharing in this trend is a new way of using space and an economic approach that has emerged to overcome the problems of traditional idle space. Sharing unused space has brought benefits to consumers and users, and questions of aging environment and inadequate facilities are being resolved in various ways. Creating new facilities in the city center is subject to many restrictions and does not meet social needs for sustainability and regeneration. Therefore, we will explore the types of space sharing values in public buildings, derive and evaluate their characteristics, and present the direction of unused space in the future. (Method) As a research method, a prior study was analyzed based on papers and literature related to public architecture and space sharing to discover and redefine the elements of public architecture and space sharing to derive the types and the characteristics of spatial sharing in public buildings. We will analyze two places for idle space utilization, four places for each administrative and educational service system, and we will evaluate the characteristics of space to rank and determine the importance of shared value factors. (Results) We derived a total of four types of values: environmental, social, economic and cultural values; with eight detailed characteristics: sustainability, usability, openness, publicity, accessibility, economics, diversity and geography. The site case analysis showed the highest environmental value among space sharing value types, measured in order of social value, economic value and cultural value. In terms of the value characteristics of shared space, sustainability and usability were the highest, followed by openness, publicity, accessibility and economic feasibility. And, overall, the score for regionalism and diversity was the lowest. (Conclusions) The role of the public in modern society is becoming more important with the spread of consumption culture centered on rational value purchasing, and society's demand for the use of public buildings to fulfill various functions and objectives has also increased. Public buildings must realize the various public values demanded by society, in addition to their original function of administration, and are responsible for improving the welfare of local residents with their services. This study is designed to model and define the value of spatial sharing in public buildings, to derive detailed characteristics, to explore and evaluate the value of spatial sharing, and to assess the potential and potential value of space to the public. Therefore, it is necessary to reevaluate future utilization methods, the potential of public buildings based on space sharing values and the characteristics of public buildings derived through research in order to enhance the usability of existing public buildings.
인터넷을 통한 도움 행위에서 이타 성격과 성 역할에 대한 탐색적 연구
이규동(Gyudong Lee),이재은(Jaeeun Lee),권순재(Soonjae Kwon) 한국인터넷전자상거래학회 2010 인터넷전자상거래연구 Vol.10 No.4
In general, people tried to help others regardless of their personal benefits. This self-sacrificing behavior is observed not only in the offline world, but also on the Internet. Because the Internet has become such an important part of everyday life in many countries, helping behavior on the Internet is a routine occurrence. However, research on the positive side of the Internet such as helping is insufficient. Although many types of helping exist, we focus on helping behaviors targeted at strangers. Because helping stranger is a self-sacrificing behavior, research on this domain provides useful insights into individuals’ psychological aspects. More specifically, this paper investigates the effects of altruistic traits, empathy, distress, and the gender of potential helper on helping stranger. This study has employed two stages of experimental approach based on scenarios to explain helping behavior and compare it in online vs. offline surroundings. The results reveal the followings: 1) altruistic traits and empathy are correlated positively with helping male targets online and 2) distress and bystanders’ gender are related to helping female targets offline. This paper explains the reasons that people help strangers in online and off-line contexts, from the perspectives of social and evolutionary psychologies. Theoretical contributions and practical implications are discussed.