نتایج جستجو برای: coating thickness hydrodynamic size

تعداد نتایج: 706979  

Journal: :iranian journal of basic medical sciences 0
farzaneh hajesmaeelzadeh biomolecular imaging analysis group, research center for molecular and cellular imaging, tehran university of medical sciences, tehran, iran department of medical physics and biomedical engineering, faculty of medicine, tehran university of medical science, tehran, iran saeed shanehsazzadeh radiation application research school, nuclear science and technology research institute, tehran, iran cordula grüttner micromod partikeltechnologie gmbh, friedrich-barnewitz-str. 4, d-18119 rostock, germany fariba johari daha radiation application research school, nuclear science and technology research institute, tehran, iran mohammad ali oghabian biomolecular imaging analysis group, research center for molecular and cellular imaging, tehran university of medical sciences, tehran, iran

objective(s):iron oxide nanoparticles have found prevalent applications in various fields including drug delivery, cell separation and as contrast agents. super paramagnetic iron oxide (spio) nanoparticles allow researchers and clinicians to enhance the tissue contrast of an area of interest by increasing the relaxation rate of water. in this study, we evaluate the dependency of hydrodynamic si...

Objective(s):Iron oxide nanoparticles have found prevalent applications in various fields including drug delivery, cell separation and as contrast agents. Super paramagnetic iron oxide (SPIO) nanoparticles allow researchers and clinicians to enhance the tissue contrast of an area of interest by increasing the relaxation rate of water. In this study, we evaluate the dependency of hydrodynamic si...

2000
Anton A. Darhuber Sandra M. Troian Jeffrey M. Davis Scott M. Miller Sigurd Wagner

We characterize the selective deposition of liquid microstructures on chemically heterogeneous surfaces by means of dip coating processes. The maximum deposited film thickness depends critically on the speed of withdrawal as well as the pattern size, geometry, and angular orientation. For vertically oriented hydrophilic strips, we derive a hydrodynamic scaling relation for the deposited film th...

Journal: :international journal of nanoscience and nanotechnology 2015
e. ghasemi m. ghahari

in this research controlled coating of magnetite (fe3o4) nanoparticles with sio2 was investigated. the fe3o4 nanoparticles were synthesized via chemical co-precipitation and then coated by silica according to stober method. effects of tetra ethyl ortho silicate (teos) concentration and ethanol to teos on the coating thickness were investigated. x-ray powder diffraction, fourier transform infrar...

2012
Christina Dahlström Tetsu Uesaka Magnus Norgren

Print quality demands for coated papers are steadily growing, and achieving coating uniformity is crucial for high image sharpness, colour fidelity, and print uniformity. Coating uniformity may be divided into two scales: coating thickness uniformity and coating microstructure uniformity, the latter of which includes pigment, pore and binder distributions within the coating layer. This thesis c...

2014
By T. Yu J. Park H. Moon J. Shim D. You D. Kim A. Ovsyannikov

Jet-wiping is a hydrodynamic method for controlling the liquid film thickness in a coating process. In industrial conditions, the jet is generally turbulent. When the jet wipes a liquid film, it usually induces violent film instability called splashing. The instability is characterized by the ejection of droplets from the runback flow. Consequently, it can degrade the final coating quality sinc...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه رازی - پژوهشکده فنی و مهندسی 1388

asymmetric polyethersulfone (pes) microfiltration flat sheet membranes were composed by the phase inversion method (pim) and were used as supports. composite membranes were fabricated by coating silicone rubber as selective layer. effect of different concentrations of pes and pdms and different solvent such as nmp, dmf and dms effects as pes solvents and support thickness and different coagulat...

Journal: :مهندسی متالورژی و مواد 0
ابراهیم کمالی علیرضا تیمورتاش محمد پسندیده فرد

in this paper, a 3d stochastic model has been presented to predict the coating thickness and porosity in a thermal spray coating process. different values of processing parameters were obtained. the model was developed on the basis of prescribed rules in calculating the splat size during the impact of individual droplets on the surface of the substrate. due to the thermal stresses produced duri...

2018
Humberto Bocanegra Evans Ali M Hamed Serdar Gorumlu Ali Doosttalab Burak Aksak Leonardo P Chamorro Luciano Castillo

Flow separation and vortex shedding are some of the most common phenomena experienced by bluff bodies under relative motion with the surrounding medium. They often result in a recirculation bubble in regions with adverse pressure gradient, which typically reduces efficiency in vehicles and increases loading on structures. Here, the ability of an engineered coating to manipulate the large-scale ...

Aluminum coating was prepared on AZ91D magnesium alloy substrate using the electrophoretic deposition (EPD) method in absolute ethanol solvent. In order to determine the optimal concentration of AlCl3.6H2O additive, the zeta potential and size of particles in the suspension were measured in the presence of different concentrations of AlCl3.6H2O. The results showed that an appropriate coating is...

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