Pulsed field gradient (PFG) NMR is applied to measure self-diffusion coefficients of 1,3,5 triisopropyl-benzene in the particles of several industrial FCC catalysts having different systems of mesoand macropores. Relating these diffusivities to the self-diffusion coefficient of 1,3,5 tri-isopropyl-benzene in the liquid phase, the tortuosity factors for diffusion in the mesoand macropores of the...

In the present study, the effect of porosity on the cathode microstructure (50:50 wt. % LSM: YSZ) of a Solid Oxide Fuel Cell (SOFC) has been examined. A 3-D finite element method for Mixed Ionic and Electronic Conducting Cathodes (MIEC) is presented to study the effects of porosity on cell performance. Each microstructure was realized using the Monte Carlo approach with the isotropic type o...

Introduction: We aimed to evaluate the relationship between coronary tortuosity and left ventricular relaxation disorder using conventional new diastolic function parameters evaluated with echocardiography. Methods: A total of 131 patients who underwent angiography for suspected artery disease were included in study. compared obtained echocardiography (CAT) normal arteries. Results: There was n...

AIMS Dolichocarotids(DCs) represent a rare(2-6%) carotid imaging finding in the general population that may be free of clinical significance or be associated with cerebrovascular events. Their detection is traditionally assigned to carotid echo-color Doppler(ECD) and selective angiography(the standard method). The primary aim of this study was to estimate the sensitivity, specificity and accura...

BACKGROUND AND PURPOSE Loeys-Dietz syndrome (LDS) is a recently described entity that has the triad of arterial tortuosity and aneurysms, hypertelorism, and bifid uvula or cleft palate. Its neuroradiologic manifestations have not been well delineated. We sought to describe the neuroradiologic features of LDS and to assess the manifestations that would warrant follow-up imaging. MATERIALS AND ...

An efficient procedure is presented for the evaluation of solid oxide fuel cell (SOFC) anode microstructure triple phase boundary length (TPBL). Triple phase boundary- the one that is common between three phases of the microstructure- has a great influence on the overall efficiency of SOFC because all electrochemical reactions of anode take place in its vicinity. Therefore, evaluation of TP...

Abstract. Ensuring sustainable strategies to manage water resources in karst reservoirs requires a better understanding of the mechanisms responsible for conduits formation rock mass and development detection methods these hydrological geochemical processes. In this study, we monitored electrical conductivity two limestone core samples during controlled dissolution experiments. We interpret res...

BACKGROUND AND PURPOSE Traditional neuroimaging markers of small-vessel disease focus on late-stage changes. We aimed to adapt a method of venular assessment at 7T for use in older adults. We hypothesized that poorer venular morphologic characteristics would be related to other small-vessel disease neuroimaging markers and a higher prevalence of small-vessel disease-Alzheimer disease risk facto...

Traumatic injury to axons in white matter of the brain and spinal cord occurs primarily via tensile stretch. During injury, the stress and strain experienced at the tissue level is transferred to the microscopic axons. How this transfer occurs, and the primary constituents dictating this transfer must be better understood to develop more accurate multi-scale models of injury. Previous studies h...