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( Mina Yun ),( Seongjoo Lee ) 한국유아교육학회 2021 정기학술대회 논문집 Vol.2021 No.1
The purpose of this study is to grasp the perception of pre-kindergarten teachers for the role of early childhood teachers using the concept mapping analysis. For this reason, 18 pre-kindergarten teachers were selected as study participants. Research participants expressed their thoughts on the focus questions, and humorously rated their importance. As a result, multidimensional scaling analysis and hierarchical cluster analysis were performed based on the calculated data. In the study, 60 final statements were generated based on the perception of the role of the early childhood teacher of the pre-kindergarten teacher, and two of ‘interaction-life guidance’ and ‘management of administrative operations-young children’s safety and health management’ were generated through multidimensional scale analysis, divided into dimensions. In addition, through cluster analysis, the statements were classified into 11 clusters including ‘managing the environment of the kindergarten’, ‘management of young children’s hygiene and health’, ‘creating classroom culture’, ‘supporting care’, ‘supporting play’, ‘operating curriculum’, ‘observing and evaluating young children’, ‘performing administrative tasks’, ‘interacting with the educational community’, ‘guiding young children’s life’, and ‘operating the whole curriculum’. The results of this study can provide implications for matters that require support during the pre-primary early childhood teacher period to form a correct perception of the role of the early childhood teacher.
Suppression of Azoxymethane-Induced Colorectal Tumors in iNOS<SUP>-/-</SUP> C57BL/6J Mice
Mina Choi,Hyun Ye Jo,Beom Seok Han,Dong Deuk Jang,Dae Joong Kim,Sang Yoon Nam,Yun-Bae Kim,Beom Jun Lee,Young Won Yun,Byeongwoo Ahn 한국실험동물학회 2006 Laboratory Animal Research Vol.22 No.2
Nitric oxide (NO) is known to be involved in the pathogenesis of colorectal cancer in both rodents and humans. iNOS is responsible for the over production of NO in a variety of parenchymal cells and macrophages. In the present study, we utilized iNOS gene knockout mice to investigate the role of iNOS on chemical-induced colorectal polyposis. Azoxymethane (AOM) at a dose of 10 ㎎/㎏ body weight was administered to male and female iNOS<SUP>-/-</SUP> or iNOS wt C57BL/6J mice once a week for six weeks. The mice were sacrificed at 24 weeks after initiation of experiment and then examined with the incidence and multiplicities of colorectal polyps. The incidence of colorectal tumors were significantly reduced in iNOS gene knockout mice (22.9%), compared to that of control mice (61.4%). The multiplicity in colorectal polyps in the iNOS knockout mice were 0.37±0.77 (n = 35), being significantly less than wild type mice (1.02 ± 1.15, n = 44). The sizes of the polyps in the iNOS gene knockout mice were also decreased. However, according to histopathological observations, most of the adenocarcinomas from iNOS knockout mice were less differentiated compared to those of wild type mice. From the results, iNOS-mediated NO might have a promotive potential in the early stage, but a suppressive effect in the late stage of colorectal carcinogenesis.
Vesosomal drug delivery for controlled and sustained release of multiple components
Jingyeong Yun(윤진경),Deborah Lee(이드보라),Seoyoon Song(송서윤),Suheon Kim(김수헌),Mina Lee(이민아),Eunsu Kim(김은수),Sunhee Yoon(윤선희),Han-Ul Kim(김한울),Sejin Son(손세진),Hyun Suk Jung(정현석),Yun Suk Huh(허윤석),Tae-Joon Jeon(전태 대한기계학회 2023 대한기계학회 춘추학술대회 Vol.2023 No.11
윤민아(Mina Yun),조성재(Seongjae Cho) 대한전자공학회 2015 대한전자공학회 학술대회 Vol.2015 No.11
In this work, process modeling of Ge condensation has been carried out and its device application has been verified. From the previous research results, we have extracted the ratio between saturated surface Ge concentration and bulk Ge concentration in the SiGe layer (CS/CB) to be 4.03 and the modified diffusion coefficient (D") to be 3.16 nm<SUP>2</SUP>/s. Furthermore, we designed by device simulation a highly scaled Ge/Si stepped nanowire-channel p-type MOSFET that can be realized by the Ge condensation technique, confirmed its feasiblity, and confirmed its superiority to the conventional devices having either naive Si or Ge channel.
도시내 방향별 섹터의 지가분포 특성에 대한 시계열적 분석
황민아(Hwang Mina),김정은(Kim Jeong Eun),윤기범(Yun Ki Bum),황희연(Hwang Hee Yun) 대한국토·도시계획학회 2012 國土計劃 Vol.47 No.4
The purpose of this study was to understand the change of land value distribution traits by distance from the center of Cheongju in alliance with street change by time series analysis. This study aimed to provide basic reference for future city plan and urban development policy. 4 sectors of Cheongju were set by development axis and preservation axis, and then basic data were analyzed to understand the spatial change. Then, land value distribution of each sector was analyzed to understand the form of land value distribution by distance from the center of the city. As the result of the analysis, despite the extension of the city caused by urban development, city center showed the highest land value. As the results, in each sector land value was the highest from the city center to l.5㎞ distance point. However, for further distance away from the city center, it was found that land value distribution was influenced by the city development such as housing developing site, etc.
Furan in Thermally Processed Foods
Yun-Jeong Seok,Jae-Young Her,Yong-Gun Kim,Min Yeop Kim,Soo Young Jeong,Mina K. Kim,Jee-yeon Lee,Cho-il Kim,Hae-Jung Yoon,Kwang-Geun Lee 한국독성학회 2015 Toxicological Research Vol.31 No.3
Furan (C₄H₄O) is a volatile compound formed mostly during the thermal processing of foods. The toxicity of furan has been well documented previously, and it was classified as “possible human carcinogen (Group 2B)” by the International Agency for Research on Cancer. Various pathways have been reported for the formation of furan, that is, thermal degradation and/or thermal rearrangement of carbohydrates in the presence of amino acids, thermal degradation of certain amino acids, including aspartic acid, threonine, α-alanine, serine, and cysteine, oxidation of ascorbic acid at higher temperatures, and oxidation of polyunsaturated fatty acids and carotenoids. Owing to the complexity of the formation mechanism, a vast number of studies have been published on monitoring furan in commercial food products and on the potential strategies for reducing furan. Thus, we present a comprehensive review on the current status of commercial food monitoring databases and the possible furan reduction methods. Additionally, we review analytical methods for furan detection and the toxicity of furan.