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Cheng-Liang Huang,Li-Ming Chiang,Chien-An Su,YUAN-YAO LI 한국공업화학회 2021 Journal of Industrial and Engineering Chemistry Vol.103 No.-
Supercapacitors (SCs) are important devices for energy storage because they provide a higher power densityas compared to that of batteries. However, SCs with high energy density and good flexibility are stillunder development. In this study, we fabricated MnO2-coated Carbon nanotube (CNT)-embedded carbonnanofiber (CNF) (referred to as MnO2/CNF-CNT) core–shell cables to investigate pseudo-capacitators,while activated CNF-CNTs obtained by CO2 activation was used for Electrical double-layer capacitors(EDLCs). Owing to the unique structure of the materials and high electrical conductivity of the CNTson the CNFs, a specific capacitance of 483.5 F/g was achieved using MnO2/CNF-CNT mat with 1 MNa2SO4 aqueous electrolyte at 0.5 A/g. A flexible MnO2/CNF-CNT supercapacitor was assembled, whichwas binder-free, electrically conductive media-free, and current collector-free. Further an asymmetricsupercapacitor was assembled with the MnO2/CNF-CNT mat and activated CNF-CNT mat in an ionic liquid(1-ethyl-3-methylimidazolium bis (trifluoromethylsulfonyl) imide) electrolyte. The maximum specificcapacitance of, energy density of and power density of 94.25 F/g, 209.4 Wh/kg and 1000 W/kg can beachieved with the asymmetric supercapacitor at 0.5 A/g and 4.0 V. We believe that these materials havesignificant potential for use in light-weight and flexible SCs.
A Simple Partial Discharge Detector for Low-Voltage Rotating Electrical Machines
Cheng-Chi Tai,Ting-Cheng Huang,Ching-Chau Su,Chien-Yi Chen,Ju-Chu Hsieh,Yu-Shiun Lin,Chung-Tzong Wang,Jeng-Hung Lai 전력전자학회 2007 ICPE(ISPE)논문집 Vol.- No.-
A new, simple partial discharge (PD) detector for low-voltage rotating electrical machines using acoustical emission (AE) technique is dseveloped in this study. Common electric components were used in the detector, which reduces the cost of inspection, comparing with the traditional PD detection methods that use expensive equipment costing from tens of thousands to several millions dollars. Experimental results by resonant type AE sensors (150 ㎑) which utilize power line-cycle in a microcontroller unit (MCU) as reference to measure the PDs generated in a low-voltage motor are presented. The AE signals are then amplified by a pre-amplifier (30 ㎑ ~ 300 ㎑, 34 ㏈). Since the resonant frequency of the sensor is much lower than that of the electromagnetic (EM) interferences around the motor, the effects of noise is substantially reduced by this method. In the mean time, the use of 150-㎑ resonant type AE sensor also avoids the disturbance of mechanical vibration noise. According to the experiment results, the measurement system developed in this study can be used to detect the PDs’ AE signals correctly. The AE measurement scheme proposed in this study provides an effective, low-cost method for PD measurements.
Cheng Wei Lu,Shu-Kuei Huang,Tzu Yu Lin,Su-Jane Wang 대한약리학회 2018 The Korean Journal of Physiology & Pharmacology Vol.22 No.3
Echinacoside, an active compound in the herb Herba Cistanche, has been reported to inhibit glutamate release. In this study, we investigated the effects of echinacoside on spontaneous excitatory synaptic transmission changes induced by 4-aminopyridine (4-AP), by using the in vitro rat hippocampal slice technique and whole-cell patch clamp recordings from CA3 pyramidal neurons. Perfusion with echinacoside significantly suppressed the 4-AP-induced epileptiform activity in a concentration-dependent manner. Echinacoside reduced 4-AP-induced increase in frequency of spontaneous excitatory postsynaptic currents (sEPSCs) but it did not affect the amplitude of sEPSCs or glutamate-activated currents, implicating a presynaptic mechanism of action. Echinacoside also potently blocked sustained repetitive firing, which is a basic mechanism of antiepileptic drugs. These results suggest that echinacoside exerts an antiepileptic effect on hippocampal CA3 pyramidal neurons by simultaneously decreasing glutamate release and blocking abnormal firing synchronization. Accordingly, our study provides experimental evidence that echinacoside may represent an effective pharmacological agent for treating epilepsy.
Lu, Cheng-Wei,Huang, Shu-Kuei,Lin, Tzu-Yu,Wang, Su-Jane The Korean Society of Pharmacology 2018 The Korean Journal of Physiology & Pharmacology Vol.22 No.3
Echinacoside, an active compound in the herb Herba Cistanche, has been reported to inhibit glutamate release. In this study, we investigated the effects of echinacoside on spontaneous excitatory synaptic transmission changes induced by 4-aminopyridine (4-AP), by using the in vitro rat hippocampal slice technique and whole-cell patch clamp recordings from CA3 pyramidal neurons. Perfusion with echinacoside significantly suppressed the 4-AP-induced epileptiform activity in a concentration-dependent manner. Echinacoside reduced 4-AP-induced increase in frequency of spontaneous excitatory postsynaptic currents (sEPSCs) but it did not affect the amplitude of sEPSCs or glutamate-activated currents, implicating a presynaptic mechanism of action. Echinacoside also potently blocked sustained repetitive firing, which is a basic mechanism of antiepileptic drugs. These results suggest that echinacoside exerts an antiepileptic effect on hippocampal CA3 pyramidal neurons by simultaneously decreasing glutamate release and blocking abnormal firing synchronization. Accordingly, our study provides experimental evidence that echinacoside may represent an effective pharmacological agent for treating epilepsy.
Current Status and Growth of Nuclear Theranostics in Singapore
Hian Liang Huang,Aaron Kian Ti Tong,Sue Ping Thang,Sean Xuexian Yan,Winnie Wing Chuen Lam,Kelvin Siu Hoong Loke,Charlene Yu Lin Tang,Lenith Tai Jit Cheng,Gideon Su Kai Ooi,Han Chung Low,Butch Maulion 대한핵의학회 2019 핵의학 분자영상 Vol.53 No.2
The concept of theranostics, where individual patient-level biological information is used to choose the optimal therapy for that individual, has become more popular in the modern era of ‘personalised’ medicine. With the growth of theranostics, nuclear medicine as a specialty is uniquely poised to grow along with the ever-increasing number of concepts combining imaging and therapy. This special report summarises the status and growth of Theranostic Nuclear Medicine in Singapore.We will cover our experience with the use of radioiodine, radioiodinated metaiodobenzylguanidine, peptide receptor radionuclide therapy, prostate specific membrane antigen radioligand therapy, radium-223 and yttrium-90 selective internal radiation therapy.We also include a section on our radiopharmacy laboratory, crucial to our implementation of theranostic principles. Radionuclide theranostics has seen tremendous growth and we hope to be able to grow alongside to continue to serve the patients in Singapore and in the region.
Chin-Sheng Huang,Su-Wen Kuo,Chia-Cheng Chen 한국증권학회 2010 Asia-Pacific Journal of Financial Studies Vol.39 No.4
The minimum price variation on the Taiwan Stock Exchange reduced for most price categories on March 1, 2005. The present paper simultaneously examines the institutional and endogenous impacts of tick size changes on transaction costs, market liquidity, and trading activity. The empirical evidence suggests that following a reduction in tick size, uniform declines are discernible in transaction costs and market liquidity. In particular, those stocks with a larger relative tick size reduction, higher trading volume, and higher order handling cost components have greater reductions in spread and market depth. Moreover, endogenous tick size reductions have an adverse effect on the trading activity for low-price stocks, due to the relative disadvantage in explicit transaction costs. Finally, the present study observes a general diminution in trade size resulting from a reduction in tick size in the Taiwan Stock Exchange. This study attributes plausible rationales to the fact that after tick size reductions, informed traders employ a smaller trade size to hide private information, or front-runners place a smaller trade size to avoid market turbulence.
Si/Ge Double-Layered Nanotube Array as a Lithium Ion Battery Anode
Song, Taeseup,Cheng, Huanyu,Choi, Heechae,Lee, Jin-Hyon,Han, Hyungkyu,Lee, Dong Hyun,Yoo, Dong Su,Kwon, Moon-Seok,Choi, Jae-Man,Doo, Seok Gwang,Chang, Hyuk,Xiao, Jianliang,Huang, Yonggang,Park, Won Il American Chemical Society 2012 ACS NANO Vol.6 No.1
<P>Problems related to tremendous volume changes associated with cycling and the low electron conductivity and ion diffusivity of Si represent major obstacles to its use in high-capacity anodes for lithium ion batteries. We have developed a group IVA based nanotube heterostructure array, consisting of a high-capacity Si inner layer and a highly conductive Ge outer layer, to yield both favorable mechanics and kinetics in battery applications. This type of Si/Ge double-layered nanotube array electrode exhibits improved electrochemical performances over the analogous homogeneous Si system, including stable capacity retention (85% after 50 cycles) and doubled capacity at a 3<I>C</I> rate. These results stem from reduced maximum hoop strain in the nanotubes, supported by theoretical mechanics modeling, and lowered activation energy barrier for Li diffusion. This electrode technology creates opportunities in the development of group IVA nanotube heterostructures for next generation lithium ion batteries.</P><P><B>Graphic Abstract</B> <IMG SRC='http://pubs.acs.org/appl/literatum/publisher/achs/journals/content/ancac3/2012/ancac3.2012.6.issue-1/nn203572n/production/images/medium/nn-2011-03572n_0006.gif'></P><P><A href='http://pubs.acs.org/doi/suppl/10.1021/nn203572n'>ACS Electronic Supporting Info</A></P>