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Effect of reaction time on the particle size of ZnO and ZnO : Ce obtained by a sol-gel method
(Springer, 2004-01-01)
In this work particles of ZnO of size range 33-56 Angstrom were prepared by a sol-gel method. The effect of reaction time on the particle size of ZnO or ZnO:Ce was investigated by transmission electron microscopy measurements, ...
Methanol oxidation on PtRu/C electrocatalysts prepared by a microemulsion method
(2007-12-01)
PtRu/C nanocatalysts were prepared by a microemulsion method using different values of water/surfactant molar ratio in order to get different particle sizes. Crystallite sizes and structural properties were determined by ...
Determination of minimum fluidization velocity for gas-solid beds by experimental data and numerical simulations
(2011-12-01)
The purpose of this work is to predict the minimum fluidization velocity Umf in a gas-solid fluidized bed. The study was carried out with an experimental apparatus for sand particles with diameters between 310μm and 590μm, ...
Wear particle classifier system based on an artificial neural network
(2010-06-01)
This paper describes a method to identify morphological attributes that classify wear particles in relation to the wear process from which they originate and permit the automatic identification without human expertise. The ...
Mapping the density of particles over the surface of asteroid (101955) Bennu
(2017-01-01)
In the present work we study the motion of particles near the surface of Bennu. An application of the results is to give assistance for the selection of the sample site. Considering the gravitational potential given by the ...
Oxygen reduction on PtFe/C electrocatalysts prepared in microemulsions
(2008-12-22)
PtFe/C nanocatalysts of different compositions and nearly constant particle size were prepared by a microemulsion method. Crystallite sizes and degree of alloying were determined by X-ray diffraction. Particle size and ...
A study of the relative velocities of small particles that are orbiting the earth
(2008-12-01)
The evolution of the velocity of the particles with respect to the circular orbits of satellites that are around the Earth that the particles will cross, suggests a range of possible velocities of impact as a function of ...
New Aerosol Particle formation in Amazonia
(Colorado, 2014-03-14)
Events of new particle formation (NPF) in tropical boundary
layer followed by consecutive growth towards Aitken
mode size range are sparse compared to mid- latitudes
Kulmala et al. (2004). This is also the case for ...
A study of the relative velocities of small particles that are orbiting the earth
(Univelt Inc, 2008-01-01)
The evolution of the velocity of the particles with respect to the circular orbits of satellites that are around the Earth that the particles will cross, suggests a range of possible velocities of impact as a function of ...