Synthesis and characterization of nickel–manganese oxide via the hydrothermal route for electrochemical capacitors

Chung-Hsien Wu,Jeng-Shin Ma,Chung-Hsin Lu 한국물리학회 2012 Current Applied Physics Vol.12 No.4

Nano-sized and well dispersed manganese oxide and nickelemanganese oxide (NieMneO) powders are synthesized via the hydrothermal route. The addition of nickel ions significantly affects the morphology,particle size and the electrochemical properties of the obtained powders. Adding nickel ions results in a significant change in the shape of the powders from rod-like to plate-like. The electrochemical analysis of the electrode reveals that the specific capacitance of the synthesized powders is greatly increased with the addition of nickel ions. When the hydrothermal temperature is increased to 125 ℃, the specific capacitance also increases to 284 F/g and decreases by about 4% after 1500 cycles of charge and recharge. NieMneO is considered to be a promising material for the electrodes used in electrochemical capacitors. Nano-sized and well dispersed manganese oxide and nickelemanganese oxide (NieMneO) powders are synthesized via the hydrothermal route. The addition of nickel ions significantly affects the morphology,particle size and the electrochemical properties of the obtained powders. Adding nickel ions results in a significant change in the shape of the powders from rod-like to plate-like. The electrochemical analysis of the electrode reveals that the specific capacitance of the synthesized powders is greatly increased with the addition of nickel ions. When the hydrothermal temperature is increased to 125 ℃, the specific capacitance also increases to 284 F/g and decreases by about 4% after 1500 cycles of charge and recharge. NieMneO is considered to be a promising material for the electrodes used in electrochemical capacitors.

Effects of reducing agents on the electrochemical properties of the prepared manganese oxide powders

Chung-Hsien Wu,Jeng-Shin Ma,Chung-Hsin Lu 한국물리학회 2012 Current Applied Physics Vol.12 No.4

Manganese oxide powders with high specific capacitance were successfully fabricated via a simple redox reaction at room temperature. The reducing agents used for the redox reaction significantly affected the oxidation states and the electrochemical properties of the prepared manganese oxide powders. As C2H5OH was used as the reducing agent, high Mn3+ content and high amount of hydroxide were observed in the prepared manganese oxide powders. In addition, the molar ratios of KMnO4 and C2H5OH also influenced the electrochemical properties of the prepared manganese oxide powders. When the molar ratio of KMnO4 and C2H5OH was 1:40, the specific capacitance of the prepared manganese oxide was as high as 402 F/g. These results of the electrochemical analysis showed that, adjusting the molar ratios of KMnO4 and C2H5OH demonstrated to be an effective method for controlling the electrochemical characteristics of manganese oxide powders.

Effects of nitrogen and carbon doping on properties and photocatalytic activity of TiO2-In2O3 composite

Chung-Hsin Wu,Chao-Yin Kuo,Jui-Tai Wu,Pui-Kwan Andy Hong,Chih-Hao Lai,Wei-Yang Chung 한국화학공학회 2015 Korean Journal of Chemical Engineering Vol.32 No.5

TiO2-In2O3 (Ti-In) was synthesized by the sol-gel method and the composite was further doped with nitrogen and carbon to create Ti-In-N and Ti-In-C, respectively. The dye C.I. Reactive Red 2 (RR2) was used a model compound to be subjected to various composites and measured for removal by photocatalytic degradation and adsorption. Ti-In-N possessed a larger mean diameter than Ti-In-C, while the latter possessed a greater anatase content and surface area than the former. After N or C doping, the spectra of corresponding Ti-In-N and Ti-In-C showed absorption edges at longer wavelengths than the parent Ti-In. Ti-N-O and Ti-O-C bonds were found in Ti-In-N and Ti-In-C composites, respectively. Ti-In-N was more effective for RR2 photodegradation than Ti-In-C, and the Ti-In-C removed more RR2 by adsorption than Ti-In-N.

Volatile Composition of Six Cultivar Species Mature Guava (Psidium guajava L.) Fruits from Taiwan Detected by Solid-Phase Microextraction with Gas Chromatography and Gas Chromatography-Mass Spectrometry Analyses

Hsin-Chun Chen,Ming-Jen Sheu,Li-Yun Lin,Chung-May Wu 한국원예학회 2006 한국원예학회 기타간행물 Vol.- No.-

Entomopathogenic fungi-mediated biological control of the red palm weevil Rhynchophorus ferrugineus

Yang Tzu-Hao,Wu Li-Hsin,Liao Chung-Ta,LIDONGWEI,Young Shin Tae,Jae Su Kim,Nai Yu-Shin 한국응용곤충학회 2023 Journal of Asia-Pacific Entomology Vol.26 No.1

The red palm weevil (RPW), Rhynchophorus ferrugineus, is an important pest of palms, and difficult to control by conventional methods. Therefore, microbial control is an alternative strategy for controlling RPW. Herein, a total of 15 entomopathogenic fungi (EPFs) were subjected to primary pathogenicity screening against last stage of RPW larvae. The preliminary data showed that four Beauveria bassiana isolates (JEF-484, 158, 462 and 507) and one Isaria fumosorosea isolate (JEF-014) resulted in 100 % mortality within 5–10 days post inoculation (d.p.i.), respectively. According to the time required for RPW mortality, JEF-484, 158, 462 and 014 were further sub jected to bioassays using 10 7 conidia/ml suspensions by spraying method. Based on the results, JEF-484 showed the highest mortality and shortest LT 50 on the last stage of RPW larvae, followed by JEF-158. The two isolates also showed good conidial production and high thermal stability compared to the other isolates. Therefore, JEF-484 and JEF-158 were selected for bioassays against RPW egg and the last larval stage with different concen trations of 10 5 , 10 6 and 10 7 conidia/ml conidial suspensions by spraying method. For the bioassay at the egg stage, JEF-158 showed a significantly higher ovicidal effect than JEF-484. In the larval bioassay, both EPF isolates showed a dosage-dependent effect on the RPW larvae. JEF-484 caused higher mortality in RPW larvae than JEF-158. In summary, the combination of the 2 promising EPF isolates might provide an opportunity for the practical microbial control of RPW at different life stages in palm tree fields.

Study on Cellar Behaviors on Different Nanostructures by Nanoporous Alumina Template

Chiung-Fang Huang,Yung-Kang Shen,Hsin-Chung Cheng,Yi Lin,Chih-Wei Wu 한국정밀공학회 2014 International Journal of Precision Engineering and Vol. No.

Nanoporous anodic aluminum oxide (AAO) templates are fabricated using an nodization method. The mean diameters of nanoporousanodic aluminum oxide templates are 100 nm and 200 nm by various processing parameters of the anodization method. A moldedplastic thin film nanostructure is fabricated by nanoimprinting using the AAO template as a mold insert. The surface properties ofthe molded plastic thin film are discussed using various nanoimprinting process parameters. Contact angles of the molded plastic thinfilm with the nanostructure exceed those without the nanostructure. The molded plastic thin films with a nanostructure and ahydrophobic surface are formed, and their contact angles exceed 90o. This study observes the behavior of osteoblast-like cells (MG63)cultured on nanostructure thin films, i.e., AAO, polylactic acid (PLA) and polycarbonate (PC). Cell growth behavior indicates thatthe AAO template with a 200 nm nanostructure is best. This study shows that cell adhesion and spreading are influenced by surfacetopography in the nanometer feature.

Gender Differences Associated with Pain Characteristics and Treatment in Taiwanese Oncology Outpatients

Liang, Shu-Yuan,Wang, Tsae-Jyy,Wu, Shu-Fang,Chao, Ta-Chung,Chuang, Yeu-Hui,Tsay, Shiow-Luan,Tung, Heng-Hsin,Lee, Ming-Der Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.7

The purpose of this descriptive and comparative study was to examine gender differences relevant to pain intensity, opioid prescription patterns and opioid consumption in Taiwanese oncology outpatients. The 92 participants had been prescribed opioid analgesics for cancer-related pain at least once in the past week and were asked to complete the Brief Pain Inventory - Chinese questionnaire and to recall the dosage of each opioid analgesic that they had ingested within the previous 24 hours. For opioid prescriptions and consumption, all analgesics were converted to morphine equivalents. The results revealed a significant difference between males and female minimum pain thresholds (t = 2.38, p = 0.02) and current pain thresholds (t = 2.12, p = 0.04), with males reporting a higher intensity of pain than females. In addition, this study found that males tended to use prescribed opioid analgesics more frequently than females on the bases of both around the clock (ATC) (t = 1.90, p = 0.06) and ATC plus as needed (ATC + PRN) (t = 2.33, p = 0.02). However, there was no difference between males and females in opioid prescriptions on an ATC basis (t = 0.52, p = 0.60) or at an ATC + PRN basis (t = 0.40, p = 0.69). The results suggest that there may be a gender bias in the treatment of cancer pain, supporting the proposal of routine examination of the effect of gender on cancer pain management. These findings suggest that clinicians should be particularly aware of potential gender differences during pain monitoring and the consumption of prescribed opioid analgesics.

Highlights of the Third Expert Forum of Asia-Pacific Laparoscopic Hepatectomy

Jeong-Ik Park,Ki-Hun Kim,Hong-Jin Kim,Daniel Cherqui,Olivier Soubrane,David Kooby,Chinnusamy Palanivelu,Albert Chan,Young Kyoung You,Yao-Ming Wu,Kuo-Hsin Chen,Goro Honda,Xiao-Ping Chen,Chung-Ngai Tang 한국간담췌외과학회 2018 Annals of hepato-biliary-pancreatic surgery Vol.22 No.1

The application of laparoscopy for liver surgery is rapidly increasing and the past few years have demonstrated a shift in paradigm with a trend towards more extended and complex resections. The development of instruments and technical refinements with the effective use of magnified caudal laparoscopic views have contributed to the ability to overcome the limitation of laparoscopic liver resection. The Endoscopic and Laparoscopic Surgeons of Asia (ELSA) Visionary Summit 2017 and the 3<SUP>rd</SUP> Expert Forum of Asia-Pacific Laparoscopic Hepatectomy organized hepatobiliary pancreatic sessions in order to exchange surgical tips and tricks and discuss the current status and future perspectives of laparoscopic hepatectomy. This report summarizes the oral presentations given at the 3<SUP>rd</SUP> Expert Forum of Asia-Pacific Laparoscopic Hepatectomy.