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Choi, Sukyung,Jin, Ho,Kim, Sungjee American Chemical Society 2014 The Journal of Physical Chemistry Part C Vol.118 No.30
<P>Inorganic surface ligands such as metal chalcogenides ligand SnS<SUB>4</SUB><SUP>4–</SUP> and metal free ligand S<SUP>2–</SUP> were introduced for CdSe quantum dot sensitized solar cell (QDSSC) applications. The SnS<SUB>4</SUB><SUP>4–</SUP> ligand QDs were successfully deposited onto TiO<SUB>2</SUB> photoanode through metal ion coordination. In solution, metal–ammonia complexes of Zn<SUP>2+</SUP>, Cd<SUP>2+</SUP>, and Cu<SUP>2+</SUP> can be coordinated by the SnS<SUB>4</SUB><SUP>4–</SUP> ligands and reverse the zeta potential. Similarly, the metal ions can be sandwiched by SnS<SUB>4</SUB><SUP>4–</SUP> ligands and the photoanode. Using the metal ion bridged SnS<SUB>4</SUB><SUP>4–</SUP> ligand QDs as the sensitizer, photovoltaic properties of the QDSSCs have been studied. Cd<SUP>2+</SUP> mediated deposition case showed better photovoltaic performance than the cases of Zn<SUP>2+</SUP> or Cu<SUP>2+</SUP>. To further investigate the surface ligand effect on QDSSC, organic/inorganic mixed surface CdSe QDs were introduced using partial ligand exchange after the deposition onto the TiO<SUB>2</SUB> photoanode. The postdeposition surface ligand exchange with inorganic ligands such as SnS<SUB>4</SUB><SUP>4–</SUP> and S<SUP>2–</SUP> is thought to retain the initial organic ligands between QDs and TiO<SUB>2</SUB> photoanode and selectively replace the QD ligands that would contact the electrolytes. Metal free S<SUP>2–</SUP> ligand QDSSC showed the best photovoltaic performance recording 1.4 times enhanced photocurrent and 1.5 times enhanced photoconversion efficiency when compared with the initial organic surface ligand QDSSC. Comparison studies on the photovoltaic properties of QDSSCs with different surfaces suggest that (i) the Cd–SnS<SUB>4</SUB><SUP>4–</SUP> complex and SnS<SUB>4</SUB><SUP>4–</SUP> surface ligand act as efficient electron traps hurdling the photovoltaic performance severely, (ii) S<SUP>2–</SUP> surface ligand works as an efficient hole trap only at the interface between the QD and TiO<SUB>2</SUB>, and (iii) S<SUP>2–</SUP> surface ligand blocks back electron transfers better than the initial organic ligand.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/jpccck/2014/jpccck.2014.118.issue-30/jp5005242/production/images/medium/jp-2014-005242_0011.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/jp5005242'>ACS Electronic Supporting Info</A></P>
Anti-quorum sensing and anti-biofilm formation activities of plant extracts from South Korea
Choi, Okhee,Kang, Dong-Wan,Cho, SuKyung,Lee, Yeyeong,Kang, Byeongsam,Bae, Juyoung,Kim, Seunghoe,Lee, JeongHoon,Lee, SeungEun,Kim, Jinwoo Medknow Publications 2018 Asian Pacific journal of tropical biomedicine Vol.8 No.8
Tuberculous peritonitis in the first trimester of pregnancy
( Sukyung Jung ),( Nae Ri Yun ),( Jeong Ok Kim ),( Jeong Hoon Lee ),( Ho Yeon Kim ),( Eunseop Song ),( Byoung Ick Lee ),( Sung Ook Hwang ),( Soo Ran Choi ) 대한산부인과학회 2017 Obstetrics & Gynecology Science Vol.60 No.2
Tuberculous peritonitis in pregnancy is a rare form of extrapulmonary tuberculosis that is not easily diagnosed. The clinical presentations of tuberculous peritonitis are usually non-specific and mimic those of other diseases, such as ovarian malignancy or chronic liver disease, and this non-specificity can cause diagnostic delays and complications. The authors report the case of a 31-year-old primigravida woman who presented with uncontrolled fever, dyspnea, elevated liver enzymes, and mild abdominal distension at 13+2 weeks of gestation. At 14+2 weeks, a therapeutic abortion was conducted and tuberculous peritonitis was confirmed by laparoscopic excisional biopsy of peritoneal nodules and histopathologic examination. The patient recovered on antituberculosis therapy and abdomen and chest follow up radiographic findings have confirmed improvement.
스마트 미디어 효능감과 소통 지능이 생활만족도에 미치는 영향
김수경(Sukyung Kim),박종석(Jong sock Park),최소연(So Yeon Choi),조희성(Hee Sung Cho),김주환(Joo Han Kim) 한국HCI학회 2013 한국HCI학회 학술대회 Vol.2013 No.1
본 연구의 목적은 스마트미디어 효능감과 소통지능이 자기결정성을 통해 생활만족도에 어떻게 영향을 미치는가를 살펴보는 데 있다. 최근의 스마트미디어 환경의 변화와 소셜미디어의 갑작스러운 확산을 고려하여 스마트미디어 효능감이라는 변인에 주목하였다. 이에 스마트미디어 이용에 대한 효능감과 소통지능이 인간의 기본적 심리욕구, 그리고 생활만족도에 다음과 같이 영향을 미치리라 가정하였다. 첫째, 스마트미디어 효능감은 인간의 기본적 심리욕구인 자율성, 유능성, 관계성을 통해 생활만족도에 긍정적인 영향을 미치리라 가정하였다. 둘째, 소통지능이 인간의 기본적 심리욕구인 자율성, 유능성, 관계성을 통해 생활만족도에 긍정적인 영향을 미칠 것이라고 보았다. 이에 더해, 학기 초 변화가 심한 신입생들의 과도기적 특성을 반영하여 2,3,4 학년 집단과 특정한 차이를 보일 것이라고 보았다. 서울 시내 사립대학교에 재학중인 대학생 454 명을 대상으로 한 설문조사를 통해 데이터를 얻었으며, 이를 구조방정식 모형을 통해 분석하였다. 분석 결과, 스마트 미디어 효능감은 예측과는 달리 자기결정성 변인이나 생활만족도에 별다른 영향을 미치지 않는 것으로 나타났다. 그러나 소통지능은 자기결정성을 통해 생활만족도에 영향을 준다는 것이 확인 되었다. 주목할 만한 점은 신입생들은 스마트미디어 효능감이 생활만족도에 긍정적 영향을 미치는 반면 2,3,4 학년 집단에서는 반대의 결과가 나타났다는 것이다. 연구 결과를 통해 인간의 기본적 심리 욕구와 생활만족도를 높이는 데에 스마트미디어 효능감과 소통지능이 중요한 의미를 가지고 있음을 확인할 수 있었다. The purpose of this study is to analyze how the effects of communication competence and smart media efficacy affect life satisfaction through the three basic psychological needs suggested by the self-determination theory. The authors of the present paper hypothesized the following: First, smart media efficacy would have positive effects on life satisfaction through autonomy, competence and relatedness. Second, communication competence would also contribute to one’s happiness through the three basic psychological needs. Additionally, we expected certain differences between freshmen and non-freshmen and that they would have different effects on life satisfaction through the three basic psychological needs. As a result, smart media efficacy did not show much effect on neither self-determination nor life satisfaction. However, people who have higher communication competence had effects on life satisfaction through autonomy, competence, and relatedness. These results imply that even though the access and influence of the diffusion of digital media has increased, it is not sufficient enough to satisfy the three basic psychological needs or life satisfaction.