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Kim, Sieun,Han, Tai-Hoon,Jung, Hyun-chul,Oh, Yong-Soo,Pu, Lyongsun,Lee, Pyoung-Chan,Nam, Jae-Do Royal Society of Chemistry 2011 Journal of materials chemistry Vol.21 No.9
<P>In this study, a solution-processable precursor, decaphenycyclopentasilane (DPCPS) was synthesized and successfully converted into an inorganic thin film through the heat treatment process. When the DPCPS coating was heat-treated at various temperatures up to 900 °C, the organic DPCPS was converted into an inorganic compound composed of Si, C and O atoms in the form of SiC<SUB><I>x</I></SUB>O<SUB><I>y</I></SUB>. The relative compositions of Si, C, and O changed with the heat-treatment temperatures changing the carbon content, for example, from 88.9% for the pristine DPCPS to 3.0% for the specimen heat-treated over 700 °C, consequently becoming SiC<SUB>0.05</SUB>O<SUB>1.7</SUB>. The dielectric constant of the heat-treated DPCPS could be tailored with the heat treatment temperatures from high- to low-dielectric materials, <I>i.e.</I>, 10.8 at 300 °C and 2.3 at 900 °C, providing tunable dielectric properties for various optoelectronic applications. The resulting inorganic thin films had excellent coating characteristics with low RMS roughness (<1.0 nm).</P> <P>Graphic Abstract</P><P>A stable solution of DPCPS was prepared and converted into inorganic SiC<SUB><I>x</I></SUB>O<I><SUB>y</SUB></I> thin films, which showed low dielectric constant values 2.4–2.5. <IMG SRC='http://pubs.rsc.org/services/images/RSCpubs.ePlatform.Service.FreeContent.ImageService.svc/ImageService/image/GA?id=c0jm02093a'> </P>
영아교사의 정서지능이 놀이교수효능감에 미치는 영향 : 교사가 인식한 부모-교사 신뢰관계와 협력행동의 매개효과를 중심으로
이시은(Sieun Lee),송승민(Seung Min Song),한정이(Jeong I Han) 한국보육지원학회 2021 한국보육지원학회지 Vol.17 No.6
Objective: The purpose of this study was to investigate the mediating effects of the parent-teacher trust relationship and cooperative behavior in the relationship between the emotional intelligence of infant teachers and their play teaching efficacy. Methods: A total number of 216 teachers in charge of infants under the age of two at childcare centers located in H, Y, and O cities in Gyeonggi-do participated in the survey. Using SPSS 23.0 and AMOS 22, descriptive statistics, correlation and structural equation model were analyzed. Results: First, the emotional intelligence of infant teachers had a direct effect on play teaching efficacy. Second, the emotional intelligence of infant teachers influenced play teaching efficacy through parent-teacher’s trust relationship. Third, the emotional intelligence of infant teachers influenced play teaching efficacythrough parent-teacher cooperative behavior. Fourthly, it was found that the parent-teacher trust relationship and cooperative behavior were mediated sequentially in the influence of the emotional intelligence of infant teachers on play teaching efficacy. Conclusion/Implications: The results of this study emphasize theimportance of improving the emotional intelligence of teachers and the trust and cooperation between parents and teachers in order to increase the ability of early childhood teacher’s play teaching efficacy.
Kim Sieun,Park Jiyeun,Han You-Kyoung,Son Hokyoung 한국미생물학회 2024 The journal of microbiology Vol.62 No.8
Fusarium graminearum is an important plant pathogen that causes head blight in cereal crops such as wheat, barley, and rice worldwide. In this study, we identified and functionally characterized FgVAC1, an essential gene in F. graminearum that encodes a Rab5 effector involved in membrane tethering functions. The essentiality of FgVAC1 was confirmed through a conditional promoter replacement strategy using the zearalenone-inducible promoter (PZEAR). Cytological analyses revealed that FgVac1 colocalizes with FgRab51 on early endosomes and regulates the proper transport of the vacuolar hydrolase FgCpy1 to the vacuole. Suppression of FgVAC1 led to inhibited vegetative growth, reduced asexual and sexual reproduction, decreased deoxynivalenol (DON) biosynthesis, and diminished pathogenicity. Our findings highlight the significant role of FgVac1 in vacuolar protein sorting, fungal development, and plant infection in F. graminearum.
Case report: secondary infertility after pulmonary tuberculosis treatment
( Sunsuk Kim ),( Jongkil Joo ),( Sieun Han ),( Hyekyung Noh ),( Kyusup Lee ) 대한산부인과학회 2016 대한산부인과학회 학술대회 Vol.102 No.-
The association between pulmonary tuberculosis (TB) and female reproductive health problems is not well addressed. This case show the need to estimate the effect of pulmonary TB on menstrual patterns and fertility of women in childbearing age. The reasons for menstrual abnormalities after TB treatment can be associated with possible antigonadotropic effect of Mycobacterium tuberculosis and increased enzymatic catabolism of estrogen caused by antitubercular drug-rifampicin affecting luteinizing hormone surge. A 32 years old multiparous woman presented to our infertility clinic in April 2015 with two year history of secondary infertility. She had a history of therapeutic termination of pregnancy at 13 weeks gestation by dilatation and evacuation due to multi drug resistance tuberculosis in 2012. And she had induced abortion due to severe hyperemesis gravidarum at 8 weeks gestation in 2010. After tuberculosis medication, she tried for a natural pregnancy for a period of 1 yr with no success. She had been investigated extensively for infertility. Noting had been found except showing polycystic ovary, and two timed intercourses with clomiphene citrates and three intrauterine insemination treatment failed. After this she underwent one cycle of in vitro fertilization (IVF), which resulted in the full-term, normal delivery of a healthy baby at 39 weeks. Any disease which is associated with systemic inflammatory response can change menstral patterns. However, hypomenorrhea, amenorrhea and irregular menstration has been described in a substantial number of patients with pulmonary TB. Acccording to one study, very high (90.9%) incidence of menstrual dysfunction was observed in TB patients which was similar in pulmonary (90.5%) and extrapulmonary (91.7%) TB cases. But the reason for this is poorly understood. TB is still an important cause of mortality and morbidity all over the world. We need to study the association with menstrual dysfunction and pulmonary TB.
( Eunhee Lee ),( Kayeong Yun ),( Sieun Han ),( Bosun Joo ),( Kyusup Lee ) 대한산부인과학회 2018 대한산부인과학회 학술대회 Vol.104 No.-
Objective: The aim of this study was to suggest the most effective primary ovarian insufficiency(POI) model construction method by examining the effect of POI model on anticancer drugs. Methods: Female mice were treated with cyclophosphamide(Cy)+busulfan(Bu) mixture for 1 week to 4 weeks and Cisplatin alone for 3, 5, 10, and 14 days. The injection period to POI occurrence was observed and the period of normal recovery from POI was checked. Results: After two weeks of the Cy+Bu injection, the weight of ovary and uterus decreased sharply and the weight reductions also affect ovarian function. And ovarian function is not recovered for at least 2 weeks when POI is induced with Cy+BU for 2 weeks. After 10 days of Cisplatin injection, the weight of ovary and uterus decreased significantly and the weight reductions also affect ovarian function. After 10 to 2 weeks of treatment with cisplatin, the embryo development rate to blastocyst was 0%. Conclusion: As an ideal POI induction model, it is useful to treat Cy+Bu for 2 weeks or cisplatin for 10 days to 2 weeks.