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Kim, Hyunchul,Park, Gwi Ok,Kim, Yunok,Muhammad, Shoaib,Yoo, Jaeseung,Balasubramanian, Mahalingam,Cho, Yong-Hun,Kim, Min-Gyu,Lee, Byungju,Kang, Kisuk,Kim, Hansu,Kim, Ji Man,Yoon, Won-Sub American Chemical Society 2014 Chemistry of materials Vol.26 No.22
<P>Tin oxide-based materials, operating via irreversible conversion and reversible alloying reaction, are promising lithium storage materials due to their higher capacity. Recent studies reported that nanostructured SnO<SUB>2</SUB> anode provides higher capacity beyond theoretical capacity based on the alloying reaction mechanism; however, their exact mechanism remains still unclear. Here, we report the detailed lithium storage mechanism of an ordered mesoporous SnO<SUB>2</SUB> electrode material. Synchrotron X-ray diffraction and absorption spectroscopy reveal that some portion of Li<SUB>2</SUB>O decomposes upon delithiation and the resulting oxygen reacts with Sn to form the SnO<SUB><I>x</I></SUB> phase along with dealloying of Li<SUB><I>x</I></SUB>Sn, which are the main reasons for unexpected high capacity of an ordered mesoporous SnO<SUB>2</SUB> material. This finding will not only be helpful in a more complete understanding of the reaction mechanism of Sn-based oxide anode materials but also will offer valuable guidance for developing new anode materials with abnormal high capacity for next generation rechargeable batteries.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/cmatex/2014/cmatex.2014.26.issue-22/cm5025603/production/images/medium/cm-2014-025603_0012.gif'></P>
Jihoon Oh(Jihoon Oh),Jihye Oh(Jihye Oh),Dong Wook Kim(Dong Wook Kim),HyunChul Youn(HyunChul Youn),Sae-Hoon Kim(Sae-Hoon Kim),Soo In Kim(Soo In Kim),In Won Chung(In Won Chung),Kuan Shu Wang(Kuan Shu Wa 대한정신약물학회 2023 CLINICAL PSYCHOPHARMACOLOGY AND NEUROSCIENCE Vol.21 No.1
Objective: To investigate the effects of long-acting injectable 3-monthly paliperidone palmitate on the clinical and social functioning of patients with schizophrenia. Methods: This study enrolled patients with schizophrenia receiving long-acting injectable 1-monthly paliperidone palmitate for at least 4 months and who subsequently received 3-monthly paliperidone palmitate. Accordingly, 418 patients were followed up for 24 weeks. Their clinical symptoms and social functioning were measured using the Clinical Global Impression-Severity of Illness and Personal and Social Performance scales. Results: The Personal and Social Performance total score was significantly higher after 3-monthly paliperidone palmitate treatment than at baseline (baseline vs. week 24: 54.3 ± 18.0 vs. 61.0 ± 14.5 [mean ± standard deviation]; p < 0.001; Wilcoxon signed-rank test); the proportion of patients in the mildly ill group (scores 71−100) also increased significantly (baseline vs. week 24: 16.5% vs. 20.6%; p < 0.001; McNemar-Bowker test). The mean Clinical Global Impression-Severity of Illness score decreased significantly (baseline vs. week 24: 3.7 ± 1.0 vs. 3.4 ± 0.9; p < 0.001; Wilcoxon signed-rank test), as did the proportion of patients in the severely ill group (baseline vs. week 24: 4.1% vs. 2.1%; p < 0.001; McNemar-Bowker test). Conclusion: Continuous 3-monthly paliperidone palmitate treatment significantly enhances the personal and social performance of patients with schizophrenia and reduces the proportion of those with severe illness. These findings suggest that long-acting injectable antipsychotic administration at intervals longer than 1 month might improve the social functioning of and promote return to activities of daily living in patients with schizophrenia.
Kim, Yunok,Muhammad, Shoaib,Kim, Hyunchul,Cho, Yong-Hun,Kim, Hansu,Kim, Ji Man,Yoon, Won-Sub Wiley-VCH 2015 ChemSusChem Vol.8 No.14
<P>The structural changes and electrochemical behavior of RuO2 are investigated by using in?situ XRD, X-ray absorption spectroscopy, and electrochemical techniques to understand the electrochemical reaction mechanism of this metal oxide anode material. Intermediate phase-assisted transformation of RuO2 to LiRuO2 takes place at the start of discharge. Upon further lithiation, LiRuO2 formed by intercalation decomposes to nanosized Ru metal and Li2 O by a conversion reaction. A reversible capacity in addition to its theoretical capacity is observed on discharging below 0.5?V during which no redox activity involving Ru is observed. TEM, X-ray photoelectron spectroscopy, and the galvanostatic intermittent titration technique are used to probe this additional capacity. The results show that the additional capacity is a result of Li storage in the grain boundary between nanosized Ru metal and Li2 O. Findings of this study provide a better understanding of the quantitative share of capacity by a unique combination of intercalation, conversion, and interfacial Li storage in a RuO2 anode.</P>
Direct observation of pseudocapacitive sodium storage behavior in molybdenum dioxide anodes
Kim, Hyunchul,Son, Suhan,Choi, Woon Ih,Park, Gwi Ok,Kim, Yunok,Kim, Hyunwoo,Jeong, Mihee,Lee, Hyo Sug,Kim, Ji Man,Yoon, Won-Sub Elsevier 2018 Journal of Power Sources Vol.397 No.-
<P><B>Abstract</B></P> <P>Compared to research progress on cathode materials, progress on anode materials for sodium rechargeable batteries has been relatively slow. To bring sodium rechargeable batteries to a next level, it is necessary to explore feasible anode materials as well as understand clearly the reaction mechanism during electrochemical cycling. We herein introduce mesoporous and bulk molybdenum dioxide materials, which show excellent sodium storage performances under ether based electrolyte conditions, as anodes for sodium rechargeable batteries. Moreover, the pseudocapacitive sodium storage behavior in molybdenum dioxide anodes is proposed based on a quantitative analysis of the cyclic voltammetry responses. This result is systematically corroborated by using synchrotron radiation based analyses, X-ray photoelectron spectroscopy, scanning transmission electron microscope and <I>ab initio</I> molecular dynamics simulation. Comprehensive information on the electrochemical characterization as well as sodium storage mechanism of this transition metal oxide will provide a practical strategy to further advance anode materials for sodium rechargeable batteries.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Introducing mesoporous and bulk MoO<SUB>2</SUB> anodes for sodium ion batteries. </LI> <LI> Excellent electrochemical performances using DME electrolyte. </LI> <LI> Pseudocapacitive sodium storage behavior is proposed based on CV measurements. </LI> <LI> Systematic validation by diverse structural analysis tools along with simulation. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>
Kim Hyunchul,Byeon Sun-ju,Kim Cheol Hong,Bae Young-A,Lee Heesung,Kim Hyun Soo 대한진단검사의학회 2021 Annals of Laboratory Medicine Vol.41 No.1
Dear Editor, Rhodotorula species, belonging to the family Sporidiobolaceae, are yeasts that are present in the environment and can cause opportunistic infections in immunocompromised patients [1, 2]. Among Rhodotorula species, only R. mucilaginosa, R. glutinis, and R. minuta have been reported to cause human infections [1, 2]. Rhodotorula sp. are mostly isolated from the blood of immunocompromised patients, where they cause fungemia or catheter-related infections. Only one case of pneumonia caused by R. mucilaginosa has been reported to date in an immunocompromised patient [3]. We report the first case of fungal pneumonia caused by R. mucilaginosa in an immunocompetent patient. The infection was confirmed by fungal ribosomal RNA (rRNA) sequencing using wedge-resected lung tissue.
Ontology for medicinal materials based on traditional Korean medicine.
Jang, Hyunchul,Kim, Jinhyun,Kim, Sang-Kyun,Kim, Chul,Bae, Soon-Hee,Kim, Anna,Eom, Dong-Myung,Song, Mi-Young Oxford University Press 2010 Bioinformatics Vol.26 No.18
<P>We are constructing an ontology for traditional Korean medicine, and we started with medicinal materials to express the relationships between patients' symptoms, diseases and treatments. Biological materials and mineral resources have been used traditionally for patient treatments. The ontology includes various data related to these materials, such as their scientific names, parts of materials used, effectiveness and related oriental organ of the human body.</P>
김철(Chul Kim),김상균(Sangkyun Kim),장현철(Hyunchul Jang),김안나(Anna Kim),김익태(Iktae Kim),송미영(Miyoung Song) 한국한의학연구원 2010 한국한의학연구원논문집 Vol.16 No.3
The purpose of this study is to develop the order communication system for Traditional Korean Medicine(TKM) which can support prescribing decisions and provide the toxicological information. The relative vulnerability of the infrastructure of TKM has made us start the study. We carried out the benchmarking for TKM charting solution firstly, and then designed the intelligent search and supporting method for prescription decisions. We developed of the medical herbs database and the web-based order communication program which can be used in medical field actually. This system supplies a various functions to oriental medical doctors such as management for prescription history, search for herb’s effects, generating prescriptions, inventory management, alerting of toxicity and taboo, guideline for taking medicine, and so on. The design and implementation process has been described in this research. We expect that this system will play an important role in electronic medical record(EMR) or electronic health record(EHR) binding diagnosis and management functions.