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应用三维重建超声组织多普勒成像技术测量心肌梗死左室不同部位的射血分数:活体羊实验研究(英文)

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中国现代医学杂志 2004年第18期14卷 6-10页

作者：王慧芳 LI Xiao-kui david J.Sahn Michael Jones Crispin H.davies Rosemary A.Rusk arthur d.zetts 暨南大学医学院附属第二教学医院超声科广东深圳518020O Oregon Health &Science University PortlandOregonUSA. National Heart Lung and Blood Institute(NHLBI)BethesdaMarylandUSA.

目的用三维重建超声组织多普勒成像(3dTdI)方法,研究左室壁运动特点及左室不同部分的射血分数(EF)。方法用重建的3dTdI的方法,对8只心尖部心肌梗死的活体羊模型在四种不同的血流状态下进行左室壁运动的测定和左室不同部分的EF测量。结... 详细信息

目的用三维重建超声组织多普勒成像(3dTdI)方法,研究左室壁运动特点及左室不同部分的射血分数(EF)。方法用重建的3dTdI的方法,对8只心尖部心肌梗死的活体羊模型在四种不同的血流状态下进行左室壁运动的测定和左室不同部分的EF测量。结果在四种不同的血流状态下,左室梗死区域的室壁运动振幅明显低于正常部分(PdTdI提供了一系列动态空间组织多普勒数据确定室壁异常运动区,并能测量左室不同部分的EF,在缺血性心脏疾病中,它有助于非侵入性心脏功能的估测。

关键词：三维超声心动图室壁瘤组织多普勒成像

Thermodynamic database development—modeling and phase diagram calculations in oxide systems

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Rare Metals 2006年第5期25卷 473-480页

作者： arthur d.Pelton Center for Research in Computational Thermochemistry Ecole PolytechniqueP.O.Box 6079Station "Downtown"MontrealQuebec H3C 3A7Canada

The databases of the FactSage thermodynamic computer system have been under development for 30 years. These databases contain critically evaluated and opthnized data for thousands of compounds and hundreds of multicomponent solutions of solid and liquid metals, oxides, salts, sulfides, etc. The databases are automatically accessed by user-friendly software that calculates complex multiphase equilibria in large multicomponent systems for a wide variety of possible input/output constraints. The databases for solutions have been developed by critical evaluation/optimization of all available phase equilibrium and thermodynamic data. The databases contain parameters of models specifically developed for different types of solutions involving sublattices, ordering, etc. Through the optimization process, model parameters are found which reproduce all thermodynamic and phase equilibrium data within experimental error limits and permit extrapolation into regions of tempea＇ature and composition where data are unavailable. The present article focuses on the databases for solid and liquid oxide phases involving 25 elements. A short review of the available databases is presented along with the models used for the molten slag and the solid solutions such as spinel, pyroxene, olivine, monoxide, corundum, etc. The critical evaluation/optimization procedure is outlined using examples from the Al203-SiO2-CaO-FeO-Fe2O3 system. Sample calculations are presented in which the oxide databases are used in conjunction with the FactSage databases for metallic and other phases. In particular, the use of the FactSage module for the calculation of multicomponent phase diagrams is illustrated.

关键词： thermodynamics oxides databases phase diagrams

An epigenetic perspective on the failing heart and pluripotent-derived-cardiomyocytes for cell replacement therapy

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Frontiers in Biology 2015年第1期10卷 11-27页

作者： Joshua d. TOMPKINS arthur d. RIGGS department of diabetes and Metabolic disease Research Beckman Research Institute/City of Hope National Medical Center 1500 E DuarteRoad Duarte CA 91010 USA

As life expectancy rises, the prevalence of heart failure is steadily increasing, while donors for organ transplantation remain in short supply （Zwi-dantsis and Gepstein, 2012）. Indeed, myocardial infarction represents the foremost cause of death within industrialized nations （Henning, 2011） and further, approximately 1% of all newborns harbor a congenital heart defect. Although medical interventions allow 〉 80% of those with cardiac defects to survive to adulthood, there are often extreme emotional and financial burdens that accompany such congenital anomalies, and many individuals will remain at a heightened risk for myocardial infarction throughout the remainder of their lives （Verheugt et al., 2010; Amianto et al., 2011）. In this review, we will discuss the nature of the failing heart and strategies for repair from an epigenetic standpoint. Significant focus will reside on pluripotent-to-cardiomyocyte differentiation for cell replacement, epigenetic mechanisms of cardiomyocyte differentiation, epigenetic ＂memories,＂ and epigenetic control of cardiomyocyte cell fate toward translational utility.

关键词： heart failure pluripotent cardiomyocytes epigenetics dNA methylation lncRNA

Computational and experimental study on corrosion inhibition potential of the synergistic 1:1 combination of Arabic and cashew gums on mild steel

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Petroleum Research 2020年第2期5卷 170-180页

作者： david Ebuka arthur department of Chemistry Base UniversityAbujaNigeria

The synergistic study of Acacia Senegal (arabic gum) and Anacardium occidentale (cashew gum) combination in corrosion inhibition of mild steel was carried out to determine the inhibition efficiency of their combination. The gums were purified using standard methods and the blend prepared using the method as described by Femi – Oyewo et al. The blend was then used for corrosion study at two temperatures (303 K and 333 K) and the corrosion rates calculated. The adsorption process was found to satisfy the Langmuir isotherm and hence the sorption study reveals that the interaction is a physical one since the free energy of adsorption (ΔG^(o) ads kJ/mol) is given as (−16.47 and −15.61) kJ/mol at temperature T = 303 K and 333K accordingly. The GCMS technique was used to characterize the blend, five chemical compounds and their area percentage [6-O-(1-L-maloyl)-alpha-,beta-d-Glcp (veracylglucan A) (22.11%), 6-Octadecanoic acid (55.76%), Methylhexadecanoate (3.97%), 1-Pentadecane carboxylic acid (10.78%) and 9, 12-Octadecadienoic acid (7.38%)] were identified and subjected to computation corrosion study, the binding energy for the constituents of the blend on Fe surface were computed using Accelrys Material Studio and the mean values were found to be −327.097 kJ/mol, −446.943 kJ/mol, −602.826 kJ/mol, −608.625 kJ/mol and −693.749 kJ/mol respectively.

关键词： Arabic gum Cashew gum Synergy dFT Corrosion

三维重建超声组织多普勒成像测量左室功能:活体动物实验研究

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中国医学影像技术 2002年第12期18卷 1224-1226页

作者：王慧芳 Xiaokui Li david J Sahn Michael Jones Crispin H davies Rosemary A Rusk arthur d.zetts 暨南大学医学院附属第二医院超声科广东深圳518020 Oregon Health & Science University NHLBI Bethesda Maryland

目的　用三维重建超声组织多普勒成像 ( 3dTdI)方法 ,研究左室壁运动特点及左室不同部分的射血分数(EF)。方法　用重建的 3dTdI的方法 ,对 8只心尖部心肌梗死的活体羊模型在四种不同的血流状态下进行左室壁运动的测定和左室不同部分的E... 详细信息

目的　用三维重建超声组织多普勒成像 ( 3dTdI)方法 ,研究左室壁运动特点及左室不同部分的射血分数(EF)。方法　用重建的 3dTdI的方法 ,对 8只心尖部心肌梗死的活体羊模型在四种不同的血流状态下进行左室壁运动的测定和左室不同部分的EF测量。结果　在四种不同的血流状态下 ,左室梗塞区域的室壁运动振幅明显低于正常部分 (PdTdI提供了一系列动态空间组织多普勒数据确定室壁异常运动区 ,并能测量左室不同部分的EF ,在缺血性心脏疾病中 ,它有助于非侵入性心脏功能的估测。

关键词：三维重建超声组织多普勒成像左室功能活体动物实验三维超声心动图缺血性心脏病室壁运动

The genetic framework for development of nephrolithiasis

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Asian Journal of Urology 2017年第1期4卷 18-26页

作者： Vinaya Vasudevan Patrick Samson arthur d.Smith Zeph Okeke Smith Institute for Urology Hofstra Northwell School of MedicineLake SuccessNYUSA

Over 1%-15% of the population worldwide is affected by nephrolithiasis,which remains the most common and costly disease that urologists manage *** of atrisk individuals remains a theoretical and technological *** search for monogenic causes of stone disease has been largely unfruitful and a technological challenge;however,several candidate genes have been implicated in the development of *** this review,we will review current data on the genetic inheritance of stone disease,as well as investigate the evolving role of genetic analysis and counseling in the management of nephrolithiasis.

关键词： Genetics Hypercalciuria Nephrolithiasis Urolithiasis Calcium sensing receptor Cystinuria Medullary sponge kidney Autosomal dominant polcystic kidney disease Uric acid nephrolithiasis Hypercalciuria

Process control factors for continuous microbial perchlorate reduction in the presence of zero-valent iron

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Frontiers of Environmental Science & Engineering 2014年第3期8卷 386-393页

作者： Robert d. arthur Jagadish TORLAPATI Kyung-Hee SHIN daniel K. CHA Yeomin YOON Ahjeong SON department of Civil Engineering Auburn University Auburn AL 36849 USA Korea Environment Institute Seoul 122-706 Republic of Korea department of Civil and Environmental Engineering University of Delaware Newark DE 19716 USA department of Civil and Environmental Engineering University of South Carolina Columbia SC 29208 USA department of Environmental Science and Engineering Ewha Womans University Seoul 120-750 Korea

Process control parameters influencing microbial perchlorate reduction via a flow-through zero-valent iron （ZVI） column reactor were investigated in order to optimize perchlorate removal from water. Mixed perchlorate reducers were obtained from a wastewater treatment plant and inoculated into the reactor without further acclimation. Examined parameters included hydraulic residence time （HRT）, pH, nutrients requirement, and perchlorate reduction kinetics. The minimum HRT for the system was concluded to be 8 hr. The removal efficiency of 10 mg. L-1 influent perchlorate concentration was reduced by 20%-80% without control to the neutral pH （HRT = 8 hr）. Therefore pH was determined to be an important parameter for microbial perchlorate reduction. Furthermore, a viable alternative to pH buffer was discussed. The microbial perchlorate reduction followed the first order kinetics, with a rate constant （K） of 0.761 hr-1. The results from this study will contribute to the implementation of a safe, cost effective, and efficient system for perchlorate reduction to below regulated levels.

关键词： perchlorate zero-valent iron (ZVI) microbial reduction hydrogen

In-chamber thermocatalytic tar cracking and syngas reforming using char-supported NiO catalyst in an updraft biomass gasifier

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International Journal of Agricultural and Biological Engineering 2014年第6期7卷 91-97页

作者： arthur M.James R Wenqiao Yuan Michael d.Boyette donghai Wang Ajay Kumar department of Biological and Agricultural Engineering North Carolina State UniversityRaleighNC 27695-7625USA department of Biological and Agricultural Engineering Kansas State UniversityManhattanKS 66506-2906USA department of Biosystems and Agricultural Engineering Oklahoma State UniversityStillwaterOK74078-6016USA

The objective of this study was to evaluate the performance of an in-chamber tar cracking and syngas reforming *** unit was composed of a two-stage tubular reactor placed within the combustion zone of an updraft biomass *** generated in the exothermic combustion reactions of biomass gasification drove tar cracking and syngas reforming in the tubes,eliminating the need of external *** performance of the unit was evaluated using char-supported NiO catalysts and was found to be very effective in tar removal and syngas composition enhancement.A tar removal rate of 95% was achieved at 0.3 s residence time and 10%nickel *** condition also gave syngas high-heating value increment of 36%(to 7.3 MJ/m^(3)).The effect of gas residence time and Ni loading on tar removal and syngas composition of the unit was also *** residence of 0.2-0.3 s and Ni loading of 5%-10% were found appropriate to produce clean syngas with tar content appropriate for industrial applications(draft biomass gasifier without external heating.

关键词： biomass gasification tar cracking syngas reforming nickel catalyst char catalyst

Finite Volume Multilevel Approximation of the Shallow Water Equations

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Chinese Annals of Mathematics,Series B 2013年第1期34卷 1-28页

作者： arthur BOUSQUET Martine MARION Roger TEMAM The Institute for Scientific Computing and Applied Mathematics Indiana University département Mathématique Informatique Université de LyonEcole Centrale de Lyon

The authors consider a simple transport equation in one-dimensional space and the linearized shallow water equations in two-dimensional space, and describe and implement a multilevel finite-volume discretization in the context of the utilization of the incremental unknowns. The numerical stability of the method is proved in both cases.

关键词： Finite-volume methods Multilevel methods Shallow water equations Stability analysis