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Ventricular repolarization markers for predicting malignant arrhythmias in clinical practice

World Journal of Clinical Cases 2015年第8期3卷 705-720页

作者： Yaniel castro-Torres Raimundo Carmona-Puerta Richard e Katholi Facultad de Medicina Universidad de Ciencias Médicas Dr.Serafín Ruiz de Zárate Ruiz Cardiocentro ernesto Che Guevara Southern Illinois University School of Medicine and Prairie Cardiovascular Consultants

Malignant cardiac arrhythmias which result in sudden cardiac death may be pre.e.t in individuals apparently healthy or be associated with other medical conditions. The way to predict their appearance repre.e.ts a challenge for the medical community due to the tragic outcomes in most cases. In the last two decades some ventricular repolarization(VR) markers have been found to be useful to predict malignant cardiac arrhythmias in several clinical conditions. The corrected QT, QT dispersion, Tpeak-Tend, Tpeak-Tend dispersion and Tp-e/QT have been studied and implemented in clinical practice for this purpose. These markers are obtained from 12 lead surface electrocardiogram. In this review we discuss how these markers have demonstrated to be effective to predict malignant arrhythmias in medical conditions such as long and short QT syndromes, Brugada syndrome, early repolarization syndrome, acute myocardial ischemia, heart failure, hypertension, diabetes mellitus, obesity and highly trained athletes. Also the main pathophysiological mechanisms that explain the arrhythmogenic predisposition in these diseases and the basis for the VR markers are discussed. However, the same results have not been found in all conditions. Further studies are needed to reach a global consensus in order to incorporate these VR parameters in risk stratification of these patients.

关键词： electrocardiographic predictor Ventricular repolarization markers Ventricular fibrillation Sudden cardiac death QT interval Corrected QT interval QT dispersion Tpeak-Tend interval Tpeak-Tend QT ratio

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effect of Rare.e.rth and Transition Metal elements on the Glass Forming Ability of Mechanical Alloyed Al–TM–re Based Amorphous Alloys

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Journal of Materials Science & Technology 2015年第11期31卷 1118-1124页

作者： ram S.Maurya Tapas Laha Department of Metallurgical & Materials engineering Indian Institute of Technology Kharagpur

The pre.e.t work aims to compare the amorphous phase forming ability of ternary and quaternary Al based alloys （Al86Ni8Y6, Al86GNi6Y6Co2, Al86NigLa6 and Al86Ni8Y45La15） synthesized via mechanical alloying by varying the composition, i.e. fully or partially replacing rare.e.rth （re） and transition metal （TM） elements based on similar atomic radii and coordination number. X-ray diffraction and high resolution transmission electron microscopy study re.e.led that the amorphization process occurred through formation of various intermetallic phases and nanocrystalline FCC Al. Fully amorphous phase was obtained for the alloys not containing lanthanum, whereas the other alloys containing La showed partial amorphization with reappearance of intermetallic phases attributed to mechanical crystallization. Differential scanning calorimetry study confirmed better thermal stability with wider transformation temperature for the alloys without La.

关键词： Al-TM-re amorphous alloy Mechanical alloying Glass forming ability Microstructural transformation Intermetallics Glass transition temperature

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Insights into the effect of a Natural Arsenate Dose on Growth,Nodulation and redox Metabolism of Soybean Plants

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Pedosphere 2019年第4期29卷 527-533页

作者： eliana BIANUCCI Ana FURLAN Luis e.HeRNáNDeZ Stella castro Instituto de Investigaciones Agrobiotecnológicas INIAB CONICET-UNRC Facultad de Ciencias ExactasFísico-Químicas y Naturales Universidad Nacional de Río Cuarto Laboratorio de Fisiología Vegetal Departamento de BiologíaUniversidad Autónoma de Madrid

Dear editor, Arsenic (As) is a harmful metalloid that occurs in soil and water;its concentration varies considerably among geographic regions, with groundwater being the principal source of human contamination (Smedley and Kinniburgh, 2002). Besides the direct contamination effect of drinking water that contains high As concentration, human poisoning may also occur after ingestion of contaminated food.

关键词： Natural Arsenate Soybean Plants redox Metabolism

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eLLIPTIC reCONSTRUCTION AND A POSTeRIORI eRroR eSTIMATeS FOR FULLY DISCre.e.SeMILINeAR PARABOLIC OPTIMAL CONTroL ProBLeMS

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Journal of Computational Mathematics 2022年第2期40卷 147-176页

作者： ram Manohar Rajen Kumar Sinha Department of Mathematics Indian Institute of Technology GuwahatiGuwahati-781039India

This article studies a posteriori error analysis of fully discre.e.finite element approximations for semilinear parabolic optimal control *** on elliptic reconstruction approach introduced earlier by Makridakis and Nochetto[25],a residual based a posteriori error estimators for the state,co-state and control variables are *** space discretization of the state and co-state variables is done by using the piecewise linear and continuous finite elements,whereas the piecewise constant functions are.e.ployed for the control *** temporal discretization is based on the backward euler *** derive a posteriori error estimates for the state,co-state and control variables in the L^(∞)(0,T;L^(2)(Ω))-***,a numerical experiment is performed to illustrate the performance of the derived estimators.

关键词： Semilinear parabolic optimal control problem Finite element method The backward euler method elliptic reconstruction A posteriori error estimates

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State of the art review on physiochemical and engineering characteristics of fly ash and its applications

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International Journal of Coal Science & Technology 2022年第1期9卷 21-45页

作者： Amit Kumar ram Supriya Mohanty Department of Civil engineering Indian Institute of Technology(Banaras Hindu University)Varanasi 221005India

The focus of this study is to critically review the physiochemical and engineering properties of the fly ash and its applications in various *** utilization of fly ash has become a widespread area,but the amount of utilization is still a serious *** has many beneficial qualities(such as pozzolanic property,fineness,spherical shape,lightweight,etc.),which enhance its properties and make it suitable for its utilization as a new construction *** the bulk utilization of fly ash,it should be employed in the areas independent of any other *** that,the disposal problem can be reduced *** knowledge of its physiochemical characteristic helps in the judgment of appropriate fly ash for any particular type of *** ash can be utilized in other areas such as asphalt concre.e.geopolymer concre.e.ground improvement,agricultural sector,roller compacted concre.e.brick,*** will reduce the existing ashes,and also the disposal problem can be solved *** implementation of fly ash must be avoided below the natural ground water level and below 4°C temperature conditions.

关键词： Fly ash Chemical property engineering property Construction material

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electron Paramagnetic resonance and Optical Absorption of VO2+Doped Ammonium Selenate Single Crystals

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Chinese Physics Letters 2011年第3期28卷 203-206页

作者： ram Kripal Ashutosh Kumar Shukla Department of Physics University of AllahabadAllahabad 211002India Department of Physics Ewing Christian CollegeAllahabad 211003India

An electron paramagnetic resonance study of vanadyl ions doped in ammonium selenate single crystals is carried out at room *** is found that the VO^(2+)ion takes up an interstitial *** spin Hamiltonian parameters obtained from the crystal rotations are g‖=1.9576±0.0002,g⊥=1.9889±0.0002,A‖=203±2 G,A⊥=78±2 *** optical absorption study is also carried out to evaluate various bonding *** the basis of these parameters the nature of bonding in the complex is discussed.

关键词： temperature parameters bonding

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Laboratory investigation on damping characteristics of homogeneous and stratified soil-ash system

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Journal of rock Mechanics and Geotechnical engineering 2023年第10期15卷 2757-2777页

作者： Amit Kumar ram Supriya Mohanty Department of Civil engineering Indian Institute of Technology(BHU)VaranasiVaranasi221005India

In this study,the damping responses of uniform soil,equi-proportional fly ash,and local soil as a single unit were *** large-strain cyclic triaxial tests were performed for the specimen compacted at the desired density(95%e99%of maximum dry density).The compacted specimens were tested under the loading frequency of 0.3e1 Hz with medium confinement of 70e100 ***,the unsymmetrical behavior of the hysteresis loop was analyzed using three different damping estimation approaches,*** hysteresis loop(SHL),asymmetric hysteresis loop(ASHL),and the modified American Society for Testing and Materials(ASTM)*** outcome of the study shows for fly ash,local soil,and layered soil-ash,the ASHL technique has the highest damping value,followed by ASTM and then the SHL *** specimens prepared under high density and subjected to high confinement show low damping ***,the specimens tested at high frequency exhibits high damping ***,the damping value of fly ash determined using the SHL and ASHL methods has a similar profile and reaches a maximum at 1%shear strain value before *** composite stratified deposit exhibits more dependency on relative compaction,confining pressure,and less on loading *** on the results,it is highly recommended to use the ASHL approach,especially under large strain conditions irrespective of soil *** maximum damping ratio of stratified deposits is always in between the damping ratio of local soil and fly *** damping ratio of stratified soil and local soil is slightly larger than that of the other soils,although the damping ratio of fly ash is equivalent to that of the sand and clayey *** results may be helpful in the accurate determination of the damping properties of the layered soil-ash system that is required in the seismic response analysis.

关键词： Homogeneous soil Stratified soil-ash system Damping behavior Cyclic triaxial test Asymmetric hysteresis loop Model fitting

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Solution of the Center Problem for a Class of Polynomial Differential Systems

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Acta Mathematica Sinica,english Series 2024年第7期40卷 1685-1696页

作者： Chang Jian Liu Jaume Llibre Rafael ramírez Valentín ramírez School of Mathematics(Zhuhai) Sun Yat-sen UniversityZhuhai519086P.R.China Departament de Matemàtiques Universitat Autònoma de Barcelona08193BellaterraBarcelonaCataloniaSpain Departament d’enginyeria Informàtica i Matemàtiques Universitat Rovira i VirgiliAvinguda dels Paiïsos Catalans 2643007TarragonaCataloniaSpain

Consider the polynomial differential system of degree m of the form x=-y(1+μ(a_(2)x-a_(1)y))+x(v(a_(1)x+a_(2)y)+Ω_(m-1)(x,y)),y=x(1+μ(a_(2)x-a_(1)y))+y(v(a_(1)x+a_(2)y)+Ω_(m-1)(x,y)),whereμandνare real numbers such that(μ^(2)+v^(2))(μ+v(m-2))(a_(1)^(2)+a_(2)^(2))≠m>2 andΩ_(m−1)(x,y)is a homogenous polynomial of degree m−1.A conjecture,stated in *** equations 2019,suggests that whenν=1,this differential system has a weak center at the origin if and only if after a convenient linear change of variable(x,y)→(X,Y)the system is invariant under the transformation(X,Y,t)→(−X,Y,−t).For every degree m we prove the extension of this conjecture to any value ofνexcept for a finite set of values ofμ.

关键词： Center problem polynomial differential system

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The role of BRCA 1 and BRCA2 in prostate cancer

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Asian Journal of Andrology 2012年第3期14卷 409-414,I0006页

作者： elena castro rosalind eeles Oncogenetics Team The Institute of Cancer Research Sutton SM2 5NG UK Academic Urology Unit The Royal Marsden NH Foundation Trust London SW3 6J J UK

One of the strongest risk factors for prostate cancer is a family history of the disease. Germline mutations in the breast cancer predisposition gene 2 （BRCA2） are the genetic events known to date that confer the highest risk of prostate cancer （8.6-fold in men ≤ 65 years）. Although the role of BRCA2 and BRCA1 in prostate tumorigenesis remains unre.e.led, deleterious mutations in both genes have been associated with more aggressive disease and poor clinical outcomes. The increasing incidence of prostate cancer worldwide supports the need for new methods to predict outcome and identify patients with potentially lethal forms of the disease. As we pre.e.t here, BRCA germline mutations, mainly in the BRCA2gene, are one of those predictive factors. We will also discuss the implications of these mutations in the management of prostate cancer and hypothesize on the potential for the development of strategies for sooradic cases with similar characteristics.

关键词： BRCA1 BRCA2 prostate cancer

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re.e.t progress on isospin breaking corrections and their impact on the muon g-2 value

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Chinese Physics C 2010年第6期34卷 712-717页

作者： Gabriel López castro Departamento de Física CinvestavApartado Postal 14-74007000 MxicoD.F Mxico

We describe some re.e.t results on isospin breaking corrections which are of re.e.ance for predictions of the leading order hadronic contribution to the muon anomalous magnetic moment aμ^*** when using τ lepton data. When these corrections are applied to the new combined data on the π^±π^0 spectral function, the prediction for aμ^*** based on τ lepton data gets closer to the one obtained using e^＋e^- data.

关键词： isospin breaking tau decays muon magnetic moment radiative corrections

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