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고분자로 표면 코팅된 BaTiO<sub>3</sub>와 이를 이용한 폴리이미드 나노복합필름의 제조 및 특성
한승산,한지연,최길영,임승순,김용석,Han, Seung San,Han, Ji Yun,Choi, Kil-Yeong,Im, Seung Soon,Kim, Yong Seok 한국공업화학회 2006 공업화학 Vol.17 No.5
본 연구는 커패시터(capacitor) 등의 유전재료로서 응용이 가능한 고분자로 코팅된 무기입자 및 이를 이용하여 제조된 유전율이 높은 폴리이미드(polyimide; PI) 나노복합재에 관한 것이다. 무기입자로는 높은 유전상수를 가지는 barium titanate(BT)를 선정하였고, 이를 유기 고분자인 나일론 6으로 표면 코팅하여 매트릭스 고분자인 폴리이미드와의 친화력을 향상시켰다. FT-IR과 TEM을 통하여 5 nm 두께의 고분자 셀(shell)이 형성된 친유기화된 무기입자(BTN)를 확인하였으며, 나일론 6이 코팅된 BT의 내경과 외경의 비, 그리고 $\alpha$와의 관계를 나타낸 모식도를 통해 고분자 코팅 두께를 조절할 수 있음을 제안하였다. 제조된 BTN과의 복합화를 통하여 폴리아믹산 나노복합용액을 제조하였으며, 이를 탈수 고리화하여 열적 및 전기적 특성이 우수한 폴리이미드 나노복합필름을 제조하였다. SEM을 통하여 BTN이 매트릭스 고분자 내에 균일 분산상을 형성함을 확인하였으며, TGA와 전기적 측정을 통하여 BTN의 함량에 따른 폴리이미드 나노복합필름의 열안정성 지수, 적분 열분해 온도 및 유전율의 변화를 각각 조사하였다. We have prepared organophilic inorganic particles and polyimide (PI) nanocomposite having excellent thermal stability and high dielectric constant that can be used for electronic application such as capacitor. We have chosen barium titanate (BT), a high dielectric constantmaterial and its surface was coated with nylon 6 to improve the affinity with PI. The FT-IR and TEM studies showed that the organophilic inorganic particle (BTN) has a polymer shell with thickness of 5 nm. We have suggested that it is possible to control the thickness of coating surface and also indicated the relationship between the ratio of inside and outside radius of BTN and the weight fraction of BT. The PI nanocomposite films based on poly(amic acid) and BTN were prepared by cyclodehydration reaction. The homogeneous dispersion of BTN in PI matrix was identified by using SEM. We have investigated the effect of BTN content on the coefficient of thermal stability, integral procedural decomposition temperature (IPDT), and dielectric constant of PI nanocomposite films.
폐암 환자에서 느릅나무 다린 물을 복용후 발생한 급성 독성 간염 및 신부전 2예
윤성민 ( Yun Seong Min ),이홍기 ( Lee Hong Gi ),천종호 ( Cheon Jong Ho ),최인근 ( Choe In Geun ),이대호 ( Lee Dae Ho ),한지연 ( Han Ji Yeon ),이진수 ( Lee Jin Su ) 대한내과학회 2003 대한내과학회지 증례 특집호 65-5 부록3 Vol.0 No.-
Traditional remedies, especially the extract of elm bark, are frequently used in Korea. But the exact efficacy and adverse effects are not known. Cancer patients are frequently recommended various traditional remedies by family members. However such remed
문성호(Moon, Sung Ho),한지연(Han, Ji Yeon),정지윤(Jung, Ji Yun) 비판과 대안을 위한 사회복지학회 2018 비판사회정책 Vol.- No.58
본 연구의 목적은 중앙입양원의 운영특성을 성과와 한계점 중심으로 파악하고, 조직의 향후 발전방안을 제시하는 것이다. 이를 위해 사업계획서와 실적보고서 등 중앙입양원의 내부자료를 심층적으로 분석하고 조직구성원의 의견을 수렴하였다. 이와 함께 입양관련 기존 연구물과 법률 및 협약자료, 전문가의 의견을 종합적으로 분석하였다. 연구결과, 운영특성은 헤이그협약 비준을 대비한 대응체계 구축, 입양정보통합관리시스템의 전산화 및 사후서비스 제공, 조사연구와 홍보활동 전개, 그리고 예산규모의 증가와 효율적인 예산편성으로 확인되었다. 이에 따른 발전방안은 공공성 강화에 초점을 둔 촘촘한 추진기반 확보, 국가책임의 체계적인 사후서비스 제공, 아동이익 최우선의 원칙에 입각한 입양정책의 철저한 실행, 그리고 입양에 대한 접근방식의 전면적 변화 등 네 가지 영역으로 구분하여 발전전략과 구체적인 실행과제를 제시하였다. 이와 같은 연구의 결과는 입양관련 법률 및 제도를 정비하거나 중앙입양원의 역할 및 기능을 강화하는데 활용될 수 있다. 향후에도 입양제도의 공공성 강화를 위한 다차원적인 연구가 지속적으로 이루어져야 할 것이다. The purpose of this study was to investigate the management characteristics of Korea Adoption Services(KAS) with focus on its performance and limitations, and present a future development plan for this organization. To this end, this study conducted in-depth analysis of KAS internal data, and collected opinions of the organization members. In addition, this study made a comprehensive analysis of the existing research results, laws, agreement data, and experts opinion. As a result of the research, The management characteristics of KAS were identified as; (1)construction of a system for ratification of the Hague Convention; (2)computerization of the adoption information management system and post-adoption service; (3)development of research and promotion activities; and (4)increase in the budget scale and efficient budget planning. This study proposed securing of a tight promotion foundation with focus on publicness strengthening, systematic post-adoption service, thorough execution of the adoption policy based on the principle of top priority on children’s interests, and overall changes in an approach to adoption. The research results could be used for improving the laws and institutions related to adoption, or for strengthening the role and function of KAS. Multidimensional researches should be continuously done for publicness strengthening of the adoption system even for the time to come.
편백유(Chamaecyparis Obtusa Oil)가 DNCB로 유도된 NC/Nga생쥐의 아토피에 미치는 효과 연구
손기정,박정환,김윤하,고가연,김윤주,한지연,고기태,안택원,Son, Ki-Jeong,Park, Jung-Hwan,Kim, Youn-Ha,Go, Ga-Yeon,Kim, Yun-Joo,Han, Ji-Yeon,Ko, Ki-Tae,Ahn, Taek-Won 대한한방안이비인후피부과학회 2016 한방안이비인후피부과학회지 Vol.29 No.1
Objective : The aim of this study is to investigate the effect of Chamaecyparis Obtusa Oil to NC/Nga mice induced in Atopic dermatitis-like skin lesions by DNCB Mthods.Methods : NC/Nga mice which have been induced to Atopic dermatitis-like skin lesions by DNCB are divided into 3 groups, the one is the mice which have been spread with Chamaecyparis Obtusa Oil 2% cream, the other is which have been spread with dexamethasone (Dexa.) 0.5% on their Atopic lesion, another is the control group. then we take the blood sample of each group to measure state of the dorsal skin, the number of immunocytes. and resect the skin lesion to analyze the state of cells.Result & Conclusion : There are meaningful results of measuring the number of IgE, IL-4, IFN-γ and the state of the skin lesion and cells in the group with hamaecyparis Obtusa Oil 2% cream in comparison with the other groups.
소득보장 및 사회통합을 위한 청년 참여소득의 도입 방안
문성호 ( Moon Sung Ho ),정지윤 ( Jung Ji Yun ),한지연 ( Han Ji Yeon ),노자은 ( Roh Ja Eun ),노지혜 ( Noh Ji Hye ) 한국청소년복지학회 2021 청소년복지연구 Vol.23 No.1
This study aimed to propose an introduction plan of youth participation income for income security and social integration. For this purpose, the features and limitations of youth policies were examined. Also, the effect and value of participation income, and overseas similar cases were comprehensively analyzed. In result, three basic directions and four implementation strategies of youth participation income were suggested. The basic directions of youth participation income were as follows; ‘anyone can participate regardless of income standard’, ‘someone contributes to society rather than the market’, and ‘local communities are promoted through community-based operation’. In the first implementation strategy, unemployed and non-standard working youths were selected as the target of youth participation income. Second, the scope of activities included growth support, social participation, public safety, and family care. Third, the operating system of participation income suggested establishing the general operating organization and emphasized the role of the central and local governments. Lastly, wage and finance, considering a minimum wage and a living wage were designed for securing up to 900,000 won per month. With regard to finance, the plan to raise fund through participating was reviewed. Youth participation income can compensate for the unstable employment and complement the limitations of unemployment policies by guaranteeing income. In addition to this, it would be able to be foundation of integrating society through providing essential social services to local communities.
강재경 ( Jae Kyoung Kang ),배수명 ( Soo Myung Bae ),송윤신 ( Yun Shin Song ),안세연 ( Se Youn Ahn ),한지연 ( Ji Youn Han ) 대한예방치과·구강보건학회 2009 大韓口腔保健學會誌 Vol.33 No.4
Objectives: The purpose of this study was to determine the depth of parents` knowledge, awareness, and attitude towards child oral health. The use of these results were fundamental for developing an oral health education program for parents of children. Methods: This study was conducted using a survey questionnaire on 206 parents of children who were educated with oral health at preschool child educational facilities in Seoul and Kyunggi-Do from 1 July 2008 to 30 August 2008. The survey consists of 4 questions about personal information, each 11 questions for parents` knowledge and awareness regarding children`s oral health, and 8 questions for parents` attitude towards children`s oral health. SPSS (SPSS 14.0 for Windows, SPSS Inc, USA) was used to perform the analysis. Results: A point converted from the parents` level of knowledge regarding the dental health turned out to be 7.4 out of a possible 11. In addition, it was found that 75.7% of respondents did not have clear information regarding fluoride. Moreover, 85.4% of respondents did not have accurate information regarding the amount of sugar in a given beverage. The majority of parents(92.3%) said that it was either one for children or contained fluoride as recommended toothpaste for their children. But 66% of respondents said that they had used over half of toothbrush length in amount of toothpaste. It was reported that 83% of children consume some beverages, such as yogurt(42.7%) and milk(33.5%) before going to bed. Most of parents seemed aware of the importance of dental health at child`s age, whereas 41.7% responded that they were not sure if they were well-instructed on how to brush their children`s teeth. Just over half of parents(55.8%) had been advised on how to brush teeth well and 55.1% of them head been given proper information regarding the brushing method from the dentist. Conclusion: An oral health education program for both children and parents needs to be developed. And, it must contain appropriate and sufficient information regarding dietary management, fluoride and tooth-brushing methods for children`s oral health.