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Influence of hematite morphology on the CO oxidation performance of Au/α-Fe_(2)O_(3)

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Chinese Journal of Catalysis 2021年第4期42卷 658-665页

作者： Yanan Gao fu-kuo chiang Shaojie Li Long Zhang Peng Wang Emiel J.M.Hensen Laboratory of Inorganic Materials and Catalysis Department of Chemical Engineering and ChemistryEindhoven University of TechnologyP.O.Box 5135600 MB EindhovenThe Netherlands National Institute of Clean-and-Low-Carbon Energy Shenhua NICEFuture Science and Technology CityBeijing 102211China

Controlling the interaction between metal nanoparticles and the support is a means to tune catalytic activity and *** we investigated the influence of the morphology of hematite on the performance of gold for CO *** and nanorod forms of hematite,α-Fe_(2)O_(3)(S)andα-Fe_(2)O_(3)(R)respectively,were used to support gold *** surface ofα-Fe_(2)O_(3)(R)was more corrugated than that ofα-Fe_(2)O_(3)(S).These defects provide anchoring sites for gold nanoparticle deposition and *** to the stronger gold-support interactions,Au/α-Fe_(2)O_(3)(R)contained smaller and more hemispherical gold particles than Au/α-Fe_(2)O_(3)(S).Au/α-Fe_(2)O_(3)(R)was not only more active in CO oxidation but also much more stable as evident from the small change in gold particle size during *** higher reducibility of Au/α-Fe_(2)O_(3)(R)also contributed to the higher CO oxidation activity.

关键词： Gold CO oxidation Hematite Morphology Stability

Engineering Fe‑N_(4)Electronic Structure with Adjacent Co‑N_(2)C_(2)and Co Nanoclusters on Carbon Nanotubes for Efficient Oxygen Electrocatalysis

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Nano-Micro Letters 2023年第12期15卷 283-297页

作者： Mingjie Wu Xiaohua Yang Xun Cui Ning Chen Lei Du Mohamed Cherif fu‑kuo chiang Yuren Wen Amir Hassanpour Francois Vidal Sasha Omanovic Yingkui Yang Shuhui Sun Gaixia Zhang State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile UniversityWuhan 430200People’s Republic of China Institut National de la Recherche Scientifique(INRS) Center Energie Materiaux TelecommunicationsVarennesQC J3X 1P7Canada Department of Chemical Engineering McGill University3610 University StreetMontrealQC H3A 0C5Canada Department of Electrical Engineering Ecole de Technologie Superieure(ETS)MontrealQC H3C 1K3Canada Canadian Light Source(CLS) 44 Innovation BoulevardSaskatoonSK S7N 2V3Canada National Institute of Low-Carbon-and-Clean-Energy Beijing 102211People’s Republic of China School of Materials Science and Engineering University of Science and Technology BeijingBeijing 100083People’s Republic of China

Regulating the local configuration of atomically dispersed transition-metal atom catalysts is the key to oxygen electrocatalysis performance *** the previously reported singleatom or dual-atom configurations,we designed a new type of binary-atom catalyst,through engineering Fe-N_(4)electronic structure with adjacent Co-N_(2)C_(2)and nitrogen-coordinated Co nanoclusters,as oxygen *** resultant optimized electronic structure of the Fe-N_(4)active center favors the binding capability of intermediates and enhances oxygen reduction reaction(ORR)activity in both alkaline and acid *** addition,anchoring M-N-C atomic sites on highly graphitized carbon supports guarantees of efficient charge-and mass-transports,and escorts the high bifunctional catalytic activity of the entire ***,through the combination of electrochemical studies and in-situ X-ray absorption spectroscopy analyses,the ORR degradation mechanisms under highly oxidative conditions during oxygen evolution reaction processes were *** work developed a new binary-atom catalyst and systematically investigates the effect of highly oxidative environments on ORR electrochemical *** demonstrates the strategy for facilitating oxygen electrocatalytic activity and stability of the atomically dispersed M-N-C catalysts.

关键词： Atomically dispersed Fe-N-C catalysts ORR/OER Rechargeable zinc-air battery fuel cells

Reaction Kinetics of Ozonation of Trichloroethylene and Benzene in Gas and Liquid Phases

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Chinese Journal of Chemical Engineering 2000年第3期8卷 272-275页

作者：钟理 kuo chiang-Hai Department of Chemical Engineering Mississippi State University MS 39762USA

The kinetics of ozonation reactions of trichloroethylene (TCE) and benzene in gas and liquid phases at 101.3 kPa and 298 K was investigated in this paper. The ozonation of TCE is first order with respect to the ozone concentration and one and half order to TCE in the gas phase with the average rate constant 57.30 (mol·L-1)-1.5·s-1, and the TCE ozonation in aqueous medium is first order with respect to both ozone and trichloroethylene with the average rate constant 6.30 (mol·L-1)-1·-1. The ozonation of benzene in the gas phase is first order in ozone but independent of the benzene concentration with the average reaction rate constant 0.0011s-1. The overall kinetics of reaction between ozone and benzene in aqueous solution is found to be first order with one-half order in both ozone and bezene, with the average reaction rate constant 2.67s-1. It is found that the ozonation rate of pallutants is much quicker than that of self-decomposition of ozone in both gas and aqueous phase.

关键词： reaction ozone pollutant trichloroethylene benzene

Association between metabolic factors and chronic hepatitis B virus infection

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World Journal of Gastroenterology 2014年第23期20卷 7213-7216页

作者： Chien-Hsieh chiang kuo-Chin Huang Department of Family Medicine National Taiwan University Hospital and College of Medicine Department of Community and Family Medicine National Taiwan University Hospital Yun-Lin Branch Graduate Institute of Clinical Medical Science China Medical University

There are limited data regarding the relationship between chronic hepatitis B virus(HBV)infection and metabolic *** article aims to highlight the link of metabolic factors with hepatitis B surface antigen(HBsAg)serostatus,HBV load,and HBV-related hepatocellular carcinoma(HCC).Although HBsAg-positive serostatus was positively correlated with a high risk of metabolic syndrome in students,chronic HBV-infected individuals have high serum adiponectin *** androgen pathway in HBV carriers with a low body mass index is more triggered which leads to enhanced HBV *** HBV load was inversely associated with obesity in hepatitis B e antigen(HBeAg)-seropositive HBV carriers;while in HBeAg-seronegative HBV carriers,high HBV load was inversely related to hypertriglyceridemia rather than *** overweight and obese HBV-infected patients,high HBV load was positively associated with serum adiponectin *** large cohort studies have revealed a positive link of diabetes with incidence of HBV-related ***,the association between incidence of HCC and metabolic factors other than diabetes is still *** long-term prospective studies should elucidate the association of chronic HBV infection and its outcomes with metabolic factors in clinical practice.

关键词： Hepatitis B surface antigen Hepatitis B viral load Hepatocellular carcinoma Diabetes Obesity Adiponectin

Adjusting Sink Location to Reduce End-to-End Delay in Low-Duty-Cycle Wireless Sensor Networks

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Journal of Electronic Science and Technology 2015年第1期13卷 20-26页

作者： Yu-Yuan Lin kuo-Feng Ssu Hau-Yu chiang Institute of Computer and Communication Engineering National Cheng Kung University Department of Electrical Engineering National Cheng Kung University Data Systems Consulting Co. Ltd

Low-duty-cycle mechanisms can reduce the energy consumption significantly in wireless sensor networks（WSNs）. Sensors stay dormant most of the time to save their energy and wake up based on their needs. However, such a technique, while prolonging the network lifetime, sets excessive challenges for reducing the end-to-end（E2E） delay within the network. In this paper, the centralized cluster-based location finding（CCLF） algorithm is proposed to reduce the high latency in low-duty-cycle WSNs by finding a suitable position for the sink. The algorithm is mainly composed of three steps： a） the cluster construction, b） the fast look-up table（FLU-table） construction, and c） the sink location decision. The simulation results show that the performance of the CCLF algorithm is significantly similar to that of the optimal algorithm. Moreover, the CCLF algorithm requires less operation time compared with the optimal algorithm.

关键词： Duty cycle latency sink wireless sensor networks

Diabetes and hepatocellular carcinoma risks in patients with nonalcoholic steatohepatitis related cirrhosis

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Hepatobiliary Surgery and Nutrition 2020年第3期9卷 357-359页

作者： Chien-Hsieh chiang kuo-Chin Huang Department of Family Medicine National Taiwan University Hospital&College of MedicineTaipei Department of Community and Family Medicine National Taiwan University Hospital Yunlin BranchYunlin Graduate Institute of Pharmacology National Taiwan University College of MedicineTaipei Hepatitis Research Center National Taiwan University HospitalTaipei

Hepatocellular carcinoma(HCC)oncogenesis in the absence of alcoholic liver disease and chronic viral hepatitis has aroused growing clinical concern in clinical practice.

关键词： clinical hepatitis Diabetes

Hair growth-promotion effects and antioxidant activity of the banana flower extract HappyAngel^(■):double-blind, placebo-controlled trial

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Food Science and Human Wellness 2023年第5期12卷 1917-1923页

作者： Chia-Hua Liang Yung-Hsiang Lin Yung-Kai Lin Chi-fu chiang Department of Cosmetic Science and Institute of Cosmetic Science Chia Nan University of Pharmacy and ScienceTainan 71710China Research&Design Center TCI CO.Ltd.Taipei 114722China Institute of Food Safety and Risk Management Department of Food ScienceTaiwan Ocean UniversityKeelung 202301China Graduate Institute of Biomedical Engineering Chung Hsing UniversityTaichung 202301China

Banana flowers contain various bioactive components, including several antioxidants with anti-inflammatory effects. However, it is unclear whether they can reduce and prevent hair loss. This study examines the effect of banana flower extracts on preventing hair loss and strengthening hair roots. The banana flower extract(HappyAngel^(■))was used to treat human hair follicle dermal papilla cells(HFDPCs)and the expression of reactive oxygen species(ROS), dihydrotestosterone(DHT), and hair-related genes(SRD5A1, SRD5A2, AR, and KROX20)were monitored. Fifty subjects were divided into a placebo group and a banana flower group. The experimental group consumed banana flower extract daily for twelve weeks and then underwent hair testing, hair-related genes analysis, collection of hair loss, and questionnaires. The results showed that the banana flower extract significantly increased hair cell growth and decreased the expression of ROS, DHT, and hair follicle growth inhibition-related SRD5A1, SRD5A2, and AR genes, and significantly increased the expression of hair growth-related KROX20 gene in HFDPCs. Consuming banana flower extract for twelve weeks increased the hair root diameter and reduced hair loss and scalp redness compared to the placebo group. Thus, banana flower extract(HappyAngel^(■))can stimulate hair growth and inhibit the activation of hair loss genes.

关键词： Banana flower Dihydrotestosterone Hair loss ROS Follicle dermal papilla cells

EZ-Manipulator:Designing a mobile,fast,and ambiguity-free 3D manipulation interface using smartphones

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Computational Visual Media 2018年第2期4卷 139-147页

作者： Po-Huan Wseng Shih-Hsuan Hung Pei-Ying chiang Chih-Yuan Yao Hung-kuo Chu "National Tsing Hua University" Hsinchu 30013TaiwanChina. "National Taiwan University of Science and Technology" Taipei 10607TaiwanChina. "National Taipei University of Technology" Taipei 10607TaiwanChina.

Interacting with digital contents in 3 D is an essential task in various applications such as modeling packages, gaming, virtual reality, etc. Traditional interfaces using keyboard and mouse or trackball usually require a non-trivial amount of working space as well as a learning process. We present the design of EZ-Manipulator, a new 3 D manipulation interface using smartphones that supports mobile, fast, and ambiguity-free interaction with 3 D objects. Our system leverages the built-in multi-touch input and gyroscope sensor of smartphones to achieve 9 degrees-of-freedom axis-constrained manipulation and free-form *** EZ-Manipulator to manipulate objects in 3 D is easy. The user merely has to perform intuitive singleor two-finger gestures and rotate the hand-held device to perform manipulations at fine-grained and coarse levels respectively. We further investigate the ambiguity in manipulation introduced by indirect manipulations using a multi-touch interface, and propose a dynamic virtual camera adjustment to effectively resolve the ambiguity. A preliminary study shows that our system has significant lower task completion time compared to conventional use of a keyboard–mouse interface, and provides a positive user experience to both novices and experts.

关键词： 3D manipulation interface interaction technique multi-touch gyroscope sensorl mobile device input device

full-field mapping of internal strain distribution in red sandstone specimen under compression using digital volumetric speckle photography and X-ray computed tomography

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Journal of Rock Mechanics and Geotechnical Engineering 2015年第2期7卷 136-146页

作者： Lingtao Mao Jianping Zuo Zexun Yuan fu-Pen chiang State Key Laboratory of Coal Resources and Safe Mining China University of Mining & Technology (Beijing) Laboratory for Experimental Mechanics Research Stony Brook University Department of Mechanical Engineering Stony Brook University

It is always desirable to know the interior deformation pattern when a rock is subjected to mechanicalload. Few experimental techniques exist that can represent full-field three-dimensional （3D） straindistribution inside a rock specimen. And yet it is crucial that this information is available for fully understandingthe failure mechanism of rocks or other geomaterials. In this study, by using the newlydeveloped digital volumetric speckle photography （DVSP） technique in conjunction with X-ray computedtomography （CT） and taking advantage of natural 3D speckles formed inside the rock due to materialimpurities and voids, we can probe the interior of a rock to map its deformation pattern under load andshed light on its failure mechanism. We apply this technique to the analysis of a red sandstone specimenunder increasing uniaxial compressive load applied incrementally. The full-field 3D displacement fieldsare obtained in the specimen as a function of the load, from which both the volumetric and the deviatoricstrain fields are calculated. Strain localization zones which lead to the eventual failure of the rock areidentified. The results indicate that both shear and tension are contributing factors to the failuremechanism. 2015 Institute of Rock and Soil Mechanics, Chinese Academy of Sciences. Production and hosting byElsevier B.V. All rights reserved.

关键词： Red sandstone Strain localization Uniaxial compression Digital volumetric speckle photography(DVSP) X-ray micro-tomography