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Synthesis of Pt Decorated Copper Oxide Nanoleaves and Its Electrochemical Detection of Glucose
Felix, Sathiyanathan,Chakkravarthy, Bala Praveen,Jeong, Soon Kwan,Grace, Andrews Nirmala The Electrochemical Society 2015 Journal of the Electrochemical Society Vol.162 No.6
<P>A novel platinum decorated CuO nanoleaves were synthesized through a facile co-precipitation method and further utilized as a sensing platform for glucose based on immobilization of Pt-CuO hybrid nanostructures with Nafion matrix. The prepared composites were characterized by X-ray Diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and transmission electron microscopy (TEM). The modified electrode exhibits excellent electrocatalytic activity towards glucose as probed by cyclic voltammetry (CV) and chronoamperometry (CA) techniques. Comparing with pure CuO/Nf/GCE, Pt-CuO/Nf/GCE, as non-enzymatic electrode materials, exhibited a good response towards glucose with linear range 2–1000 μM with a higher sensitivity of 1681.7 μA mM<SUP>−1</SUP>cm<SUP>−2</SUP> and detection limit of 11 μM. The excellent electrocatalytic performances could be attributed to the Cu(II)/Cu(III) multiple oxidation states system could promote the redox reactions between electrode materials and glucose, and the electroactive sites became more active due to the synergic effect. The results, high sensitivity, excellent selectivity and long term stability showing that, Pt-CuO is a promising material for the future development of nonenzymatic glucose sensors.</P>
Felix, S.,Kollu, P.,Raghupathy, B.P.C.,Jeong, S.K.,Grace, A.N. Elsevier Sequoia 2015 Journal of Electroanalytical Chemistry Vol.739 No.-
Platelet-like copper oxide nanostructures were prepared by a hydrothermal method. Various techniques like X-ray diffraction (XRD), field emission scanning electron microscope (FE-SEM) and transmission electron microscope (TEM) were used to characterize the structure and morphology of the as-prepared products. The electrocatalytic oxidation of carbohydrates and dopamine on the surface of the modified electrode were studied by cyclic voltammetry (CV), differential pulse voltammetry (DPV) and chronoamperometry (CA). Under the optimal experimental condition, the CuO nanoplatelets (CuO NPlts) loaded on glassy carbon electrode (GCE) exhibited excellent sensitivity in the linear concentration range of carbohydrates, good stability and reproducibility. Interferences from other biological compounds were studied and results indicated good selectivity for glucose, sucrose, and fructose. Apart from the detection of carbohydrates, the electrode was tested for detection possibility of dopamine in the range of 10-80μM in phosphate buffer solution (PBS) with a detection limit of 8.25μM.
Felix Septianto,황명호,정재석 한국마케팅학회 2014 ASIA MARKETING JOURNAL Vol.16 No.2
Although previous works have established that mood can considerably influence consumer behavior(Vohs et al. 2007), they provided inconsistent results (Cohen et al. 2008). In particular, previousworks only examined the willingness of consumers to regulate their mood and implicitly assumed thatconsumers have the control to regulate their mood states. Thus, this research intends to fill thecurrent gap in the extant literatures by investigating whether consumer locus of control (CLOC) canact as a moderator for mood effects on consumers’ likelihood to purchase. In an experiment, participants’ CLOC was initially measured. Afterwards, they watched differentvideo clips to induce different mood states. Finally, participants rated their likelihood to purchaseafter seeing an advertisement. The results suggest that, in the positive mood, CLOC tendencies donot impact consumers’ likelihood to purchase. However, in the negative mood, internal CLOC consumersshow a higher likelihood to purchase than external CLOC consumers. This phenomenon occurs becauseconsumers with high internal CLOC tendencies have the motivation to regulate their negative mood. These findings extend the extant literatures in four aspects. First, this paper shows that the CLOCtendencies could influence consumers’ motivation to regulate their negative mood. Second, thisresearch examines the moderating effect of CLOC in the relationship between mood and consumers’likelihood to purchase. Third, the results add further evidence regarding the role of negative mood inthe self-regulation process. Finally, this research also shows that mood can unconsciously influenceconsumer behavior. This paper provides two managerial implications. First, marketers should considerthe mood states and consumers’ control tendencies in creating advertisements. Second, firms in retailor service business should aim to evoke a positive mood on consumers so that their CLOC tendencieswould not influence their behaviors.
Felix Septianto,Jake Ana,Bambang Soegianto 한국마케팅과학회 2019 마케팅과학연구 Vol.29 No.3
Prior research in charitable giving and prosocial behavior has identified that demographic and psychological factors can influence consumer intentions to donate. However, such research has mostly examined the net effects of such factors. The current research aims to address this important issue by employing fuzzy-set qualitative comparative analysis (fsQCA) and exploring different combinations of moral emotion, moral judgment, moral identity, and demographic factors that lead to higher customer intentions to donate time and money. In doing so, this research provides concrete managerial implications by highlighting the importance of personalized and targeted marketing strategies.
A note on buckling and vibration of clamped orthotropic plates under in-plane loads
Felix, D.H.,Bambill, D.V.,Rossit, C.A. Techno-Press 2011 Structural Engineering and Mechanics, An Int'l Jou Vol.39 No.1
The present work deals with obtaining the critical buckling load and the natural frequencies of clamped, orthotropic, rectangular thin plates subjected to different linear distributed in-plane forces. An analytical solution is proposed. Using the Ritz method, the dependence between in-plane forces and natural frequencies are estimated for various plate sizes, and some results are compared with finite element solutions and where possible, comparison is made with previously published results. Beam functions are used as admissible functions in the Ritz method.
On Teaching Switched Mode Power Supplies - A Converter with Limited Duty Cycle
Felix A. Himmelstoss 전력전자학회 2010 JOURNAL OF POWER ELECTRONICS Vol.10 No.6
A way how to teach a general understanding of switched mode power supplies (SMPS) is shown. A fourth order PWM DC-to-DC converter with limited duty cycle range is treated as an example and a survey over important data (maximum voltage and current ratings for the elements, rms- values for the semiconductor devices and a rough approximation of the losses) of the circuit is given. Furthermore, a converter model based on duty ratio averaging is established. Continuous mode of operation is used. The results make it possible to estimate the applicability of the given converter structure and offer sufficient material for the calculation, design, and analysis and give a better insight into switched mode energy conversion.
Pathophysiology and Management of Alcoholic Liver Disease: Update 2016
( Felix Stickel ),( Christian Datz ),( Jochen Hampe ),( Ramon Bataller ) 대한소화기학회 2017 Gut and Liver Vol.11 No.2
Alcoholic liver disease (ALD) is a leading cause of cirrhosis, liver cancer, and acute and chronic liver failure and as such causes significant morbidity and mortality. While alcohol consumption is slightly decreasing in several European countries, it is rising in others and remains high in many countries around the world. The pathophysiology of ALD is still incompletely understood but relates largely to the direct toxic effects of alcohol and its main intermediate, acetaldehyde. Recently, novel putative mechanisms have been identified in systematic scans covering the entire human genome and raise new hypotheses on previously unknown pathways. The latter also identify host genetic risk factors for significant liver injury, which may help design prognostic risk scores. The diagnosis of ALD is relatively easy with a panel of well-evaluated tests and only rarely requires a liver biopsy. Treatment of ALD is difficult and grounded in abstinence as the pivotal therapeutic goal; once cirrhosis is established, treatment largely resembles that of other etiologies of advanced liver damage. Liver transplantation is a sound option for carefully selected patients with cirrhosis and alcoholic hepatitis because relapse rates are low and prognosis is comparable to other etiologies. Still, many countries are restrictive in allocating donor livers for ALD patients. Overall, few therapeutic options exist for severe ALD. However, there is good evidence of benefit for only corticosteroids in severe alcoholic hepatitis, while most other efforts are of limited efficacy. Considering the immense burden of ALD worldwide, efforts of medical professionals and industry partners to develop targeted therapies in ALF has been disappointingly low. (Gut Liver 2017;11:173-188)