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p‐Type InP Nanopillar Photocathodes for Efficient Solar‐Driven Hydrogen Production
Lee, Min Hyung,Takei, Kuniharu,Zhang, Junjun,Kapadia, Rehan,Zheng, Maxwell,Chen, Yu‐,Ze,Nah, Junghyo,Matthews, Tyler S.,Chueh, Yu‐,Lun,Ager, Joel W.,Javey, Ali WILEY‐VCH Verlag 2012 Angewandte Chemie Vol.124 No.43
<P><B>Perfekte Textur</B>: Der Einfluss der Oberflächen‐Nanotexturierung, der TiO<SUB>2</SUB>‐Passivierung und des Ru‐Cokatalysators auf die photoelektrochemische Wasserstoffentwicklung durch p‐InP‐Photokathoden wurde untersucht. Höhere Stromdichten und günstigere Onset‐Potentiale werden nach Oberflächen‐Nanotexturierung beobachtet. NHE=Normalwasserstoffelektrode.</P>
Chen, Yu-Chih,Baac, Hyoung Won,Lee, Kyu-Tae,Fouladdel, Shamileh,Teichert, Kendall,Ok, Jong G.,Cheng, Yu-Heng,Ingram, Patrick N.,Hart, A. John,Azizi, Ebrahim,Guo, L. Jay,Wicha, Max S.,Yoon, Euisik American Chemical Society 2017 ACS NANO Vol.11 No.5
<P>Considerable evidence suggests that self-renewal and differentiation of cancer stem-like cells, a key cell population in tumorgenesis, can determine the outcome of disease. Though the development of microfluidics has enhanced the study of cellular lineage, it remains challenging to retrieve sister cells separately inside enclosed microfluidics for further analyses. In this work, we developed a photomechanical method to selectively detach and reliably retrieve target cells from enclosed microfluidic chambers. Cells cultured on carbon nanotube polydimethylsiloxane composite surfaces can be detached using shear force induced through irradiation of a nanosecond-pulsed laser. This retrieval process has been verified to preserve cell viability, membrane proteins, and mRNA expression levels. Using the presented method, we have successfully performed 96-plex single-cell transcriptome analysis on sister cells in order to identify the genes altered during self-renewal and differentiation, demonstrating phenomenal resolution in the study of cellular lineage.</P>
Impact of Adjuvant Chemotherapy in Elderly Breast Patients in Taiwan, A Hospital-Based Study
Lee, Hsiu Chuan,Chen, Wei Yu,Huang, Wen Tsung,Cheng, Kuo Chen,Tian, Yu Feng,Ho, Chung Han,Tsao, Chao Jung,Feng, Yin Hsun Asian Pacific Journal of Cancer Prevention 2016 Asian Pacific journal of cancer prevention Vol.17 No.10
Purpose: Decisions as to whether to provide adjuvant treatment in older breast cancer patients remains challenging. Side effects of chemotherapy have to be weighed against life expectancy, comorbidities, functional status, and frailty. To aid decision-making, we retrospectively analyzed 110 women with breast cancer treated with a curative intention from 2006 to 2012. Survival data with clinical and pathological parameters were evaluated to address the role of adjuvant chemotherapy in this study population. Method: A total of 110 elderly (>70 years) patients that received mastectomy at two hospitals in Taiwan were observed retrospectively for a medium of 51 months. After mastectomy, patients received conservative treatment or adjuvant chemotherapy, or hormone therapy following clinical guidelines or physician's preference. Data were collected from the cancer registry system. Results: Median age at diagnosis was 75.7 years. Thirty-five percent of patients received adjuvant chemotherapy, these having a significantly younger age ($mean=74.0{\pm}5.3$ vs $77.5{\pm}5.3$, p<0.001) and higher tumor staging (p=0.003) compared with their non-chemotherapy counterparts.Five-year overall survival was non-significantly higher in patients who received adjuvant chemotherapy (with chemotherapy 64.2% vs without chemotherapy 62.6%, p=0.635), while five-year recurrence free survival was non-significantly lower (with chemotherapy 64.1% vs without chemotherapy 90.5%, p=0.80). Conclusions: In this analysis, adjuvant chemotherapy tended to be given to patients with a younger age and higher tumor staging at our institute. It was not associated with any statistically significant improvement in survival and recurrence rate. Until age specific recommendations are available, physicians must use their clinical judgment and assess the tumor biology with the patient's comorbidities to make the best choice. Clinical trials focusing on this critical issue are warranted.
Metal microparticle – Polymer composites as printable, bio/ecoresorbable conductive inks
Lee, Seungae,Koo, Jahyun,Kang, Seung-Kyun,Park, Gayoung,Lee, Yung Jong,Chen, Yu-Yu,Lim, Seon Ah,Lee, Kyung-Mi,Rogers, John A. Elsevier 2018 Materials today Vol.21 No.3
<P>Biologically and environmentally resorbable electronic devices support application possibilities that cannot be addressed with conventional technologies. This paper presents highly conductive, water-soluble composites that can be printed to form contacts, interconnects, antennas, and other important features that are essential to nearly all systems of this type. An optimized material formulation involves in situ polymerization to yield a polyanhydride containing a dispersion of molybdenum microparticles at appropriate concentrations. Comparisons of essential physical and electrical properties of these materials to those of composites formed with other polymers and other metal microparticles reveal the relevant considerations. Various functional demonstrations of screen-printed test structures and devices illustrate the suitability of these conductive inks for use in water-soluble electronic devices. A key advantage of the material introduced here compared to alternatives is its ability to maintain conductance over significant periods of time while immersed in relevant aqueous solutions. Studies involving live animal models establish the biocompatibility.</P>
The association of ambient air pollution with airway inflammation in schoolchildren.
Chen, Bing-Yu,Chan, Chang-Chuan,Lee, Chung-Te,Cheng, Tsun-Jen,Huang, Wen-Chuan,Jhou, Ji-Ci,Han, Yueh-Ying,Chen, Chu-Chih,Guo, Yue Leon School of Hygiene and Public Health of the Johns H 2012 American Journal of Epidemiology Vol.175 No.8
<P>The biologic mechanisms involved in airway inflammatory response to air pollution are not clearly understood. The authors conducted a longitudinal study to investigate whether exposure to ambient air pollutants affected inflammatory cells and mediators from nasal lavage in schoolchildren. Study participants were 100 elementary and middle-school students in New Taipei City, Taiwan. A structured respiratory health questionnaire was administered in September 2007, followed by monthly measurement of nasal inflammation from October 2007 to November 2009. During the study period, daily concentrations of air pollutants were obtained from the Environmental Protection Administration monitoring station and the Aerosol Supersite. Mixed-effects models were applied to examine the association between air pollution and nasal inflammatory cells and mediators, including percentages of neutrophils, eosinophils, and monocytes in lavaged cells and interleukin-8. A total of 824 measurements were obtained from 100 participants over a period of 10 months. The level of particulate matter with an aerodynamic diameter of 2.5 μm or less (PM(2.5)) was found to be associated with percentage of neutrophils (β = 3.45%, 95% confidence interval: 0.89, 6.01) and interleukin-8 level (β = 29.98 pg/mL, 95% confidence interval: 3.26, 56.69) in the nasal lavage on the day of exposure. In this longitudinal cohort study of schoolchildren, results indicated that exposure to PM(2.5) might induce nasal inflammation.</P>
Yu-Chen Liu,Nguyen Dinh Phuc,Yu-Chun Lee 전력전자학회 2023 ICPE(ISPE)논문집 Vol.2023 No.-
This paper introduces a four-level flying capacitor boost DC–DC converter for photovoltaic (PV) systems. Compared to traditional boost converter, this four-level boost converter has three times smaller of voltage stress on switches and three times bigger of frequency applied for inductor. Therefore, these characteristics allow the deployment of lower voltage rating switches and reduced inductance, which makes higher efficiency and low cost. Additionally, this paper also discusses about zero-voltage switching (ZVS) model for four-level boost converter in triangular conduction mode (TCM) operation. With ZVS model, the minimum inductor current can be derived, and the required dead-time can be calculated, which results the reduction in the duty cycle loss. Moreover, the switching frequency range is calculated from the range of load in TCM operation, which leads to the reduction of inductor current ripple and the conduction loss at light load. The experimental results of a flying capacitor multi-level DC–DC converter is implemented with a maximum output power of 400 W. The result shows the efficiency of variable frequency is better than the fixed frequency in TCM operation.
Three-Level Bi-Directional Half-Bridge CLLC Resonant Converter for DC Micro-Grid
Hsuan-Yu Yueh,Jing-Yuan Lin,Haung-Jen Chiu,Chen-Yen Chu,Yu-Chen Chang,Sih-Yi Lee 전력전자학회 2019 ICPE(ISPE)논문집 Vol.2019 No.5
A Three-Level Bi-Directional Half-Bridge CLLC Resonant DC-DC converter for DC micro-grid application is studied on this paper, which uses dual resonant tanks to achieve wide range voltage regulation and meanwhile employs bi-directional capability. All power switches on this converter can achieve ZVS function at the whole load and the voltage stress on all power switches at both sides can be clamped at half of input voltage and output voltage since the three-level circuit architecture using the proposed synchronous rectifier (SR) control, therefore, the voltage stresses of the transformer, resonant tanks, power switches and other components are only half compared with conventional half-bridge CLLC resonant converter, the downsizing rated of components selection can be more flexible. Finally, the laboratory prototype is built to verify the performance of voltage balancing on input/output capacitor, voltage stress on switches and efficiency, the measured efficiency can be up to 95.6% over different load conditions.
Chun-Yu Liu,Tzu-Ting Huang,Pei-Yi Chu,Chun-Teng Huang,Chia-Han Lee,Wan-Lun Wang,Ka-Yi Lau,Wen-Chun Tsai,Tzu-I Chao,Jung-Chen Su,Ming-Huang Chen,Chung-Wai Shiau,Ling-Ming Tseng,Kuen-Feng Chen 생화학분자생물학회 2017 Experimental and molecular medicine Vol.49 No.-
Triple-negative breast cancer (TNBC) remains difficult to treat and urgently needs new therapeutic options. Nintedanib, a multikinase inhibitor, has exhibited efficacy in early clinical trials for HER2-negative breast cancer. In this study, we examined a new molecular mechanism of nintedanib in TNBC. The results demonstrated that nintedanib enhanced TNBC cell apoptosis, which was accompanied by a reduction of p-STAT3 and its downstream proteins. STAT3 overexpression suppressed nintedanib-mediated apoptosis and further increased the activity of purified SHP-1 protein. Moreover, treatment with either a specific inhibitor of SHP-1 or SHP-1-targeted siRNA reduced the apoptotic effects of nintedanib, which validates the role of SHP-1 in nintedanib-mediated apoptosis. Furthermore, nintedanib-induced apoptosis was attenuated in TNBC cells expressing SHP-1 mutants with constantly open conformations, suggesting that the autoinhibitory mechanism of SHP-1 attenuated the effects of nintedanib. Importantly, nintedanib significantly inhibited tumor growth via the SHP-1/p-STAT3 pathway. Clinically, SHP-1 levels were downregulated, whereas p-STAT3 was upregulated in tumor tissues, and SHP-1 transcripts were associated with improved disease-free survival in TNBC patients. Our findings revealed that nintedanib induces TNBC apoptosis by acting as a SHP-1 agonist, suggesting that targeting STAT3 by enhancing SHP-1 expression could be a viable therapeutic strategy against TNBC.
교통사고 후 발생한 경항통 환자에 대한 황련해독탕약침과 분리정제봉약침의 치료 효과 비교연구: 무작위 배정
이옥진 ( Yu Chen Lee ),남대진 ( Dae Jin Nam ),허건 ( Gun Huh ),이재은 ( Jae Eun Lee ),김빛나라 ( Bin Na Ra Kim ),송은모 ( Eun Mo Song ),이은정 ( Eun Jung Lee ),이정민 ( Jung Min Lee ),오민석 ( Min Seok Oh ) 한방재활의학과학회 2014 한방재활의학과학회지 Vol.24 No.4
ObjectivesThe purpose of this study is to compare the effects of HWANGRY-UNHAEDOKTANG Pharmacopuncture and Essential Bee Venom pharmacopuncture on cervical pain caused by traffic accident.MethodsThe clincal study was conducted to traffic accident patients who had admitted to Dae-Jeon University Cheonan Oriental Hospital from May 17, 2014 to September 2, 2014. The patients were simple randomization and divided into two groups. In one group, patients were treated with the oriental medicine and HWANGRYUNHAEDOKTANGPharmacopuncture, While in the other group, patients were treated with the oriental medi-cine therapy and Essential Bee Venom pharmacopuncture therapy. visual analogue scale (VAS), pain threshold and neck disablity index (NDI) were used To estimate the efficacy of Pharmacopuncture treatment.Results1) HWANGRYUNHAEDOKTANG Pharmacopuncture Group showed significant decrease of VAS and NDI after 3rd times treatment than before treatment (p<0.001). Essential Bee Venom Pharmacopuncture showed significant decrease of VAS, NDI and improve ment of pain threshold after 3rd times treatment than before treatment (p<0.01, p<0.001). 2) There was no significant difference between HWANGRYUNHAEDOKTANGPharmacopuncture group and Essential Bee Venom Pharmacopuncture group in VAS, pain threshold and NDI. ConclusionsWe found out that HWANGRYUNHAEDOKTANG Pharmacopuncture and Essential Bee Venom Pharmacopuncture treatment are considered to be effective and useful in cervical pain caused by traffic accident. (J Korean Med Rehab 2014;24(4): 145-153)