scholarly journals Towards an accurate size distribution of emulsion droplets by merging distributions estimated from different measuring methods

2022 ◽  
Vol 46 ◽  
pp. 100569
Author(s):  
Margaritis Kostoglou ◽  
Thodoris D. Karapantsios ◽  
Angeliki P. Chondrou ◽  
Maria C. Vlachou
Keyword(s):  
Size Distribution ◽  
Measuring Methods ◽  
Emulsion Droplets

Optimization of measuring methods on size distribution of naturally occurring radioactive aerosols

2005 ◽  
Vol 1276 ◽  
pp. 297-298 ◽  
Author(s):  
K. Yamasaki ◽  
Y. Oki ◽  
Y. Yamada ◽  
S. Tokonami ◽  
T. Iida
Keyword(s):  
Size Distribution ◽  
Radioactive Aerosols ◽  
Measuring Methods ◽  
Naturally Occurring

Drop size distribution in emulsions O/W stabilized by nonionic emulsifier; Description of distribution by empirical relations

1983 ◽  
Vol 48 (7) ◽  
pp. 1996-2008 ◽  
Author(s):  
Miloslav Ludvík ◽  
Petr Durdil
Keyword(s):  
Parameter Estimation ◽  
Normal Distribution ◽  
Size Distribution ◽  
Random Sample ◽  
Drop Size ◽  
Drop Size Distribution ◽  
Emulsion Droplets ◽  
Empirical Relations ◽  
Nonionic Emulsifier

Here is analysed how suitable are the most frequently used empirical relations for description of drop size distribution. On a representative set of emulsifying experiments is demonstrated how suitable in the three-parametric logarithmic normal distribution according to Cohen and distribution according to Espenscheid-Kerker-Matijević. For these functions are proposed methods of parameter estimation suitable for their determination from the random sample of emulsion droplets. The fittnes of testing functions is discussed briefly.

Stagnant Layer Conduction in Surfactant-Stabilized Hexadecane Emulsion Systems Measured by Electroacoustics

2003 ◽  
Vol 56 (10) ◽  
pp. 1081 ◽  
Author(s):  
Alex M. Djerdjev ◽  
James K. Beattie ◽  
Robert J. Hunter
Keyword(s):  
Zeta Potential ◽  
Size Distribution ◽  
Droplet Size ◽  
Volume Fraction ◽  
Sodium Dodecyl ◽  
Shear Plane ◽  
Surface Conductance ◽  
Zeta Potentials ◽  
Emulsion Droplets ◽  
Dynamic Mobility

Previously reported zeta-potentials calculated from the electroacoustic behaviour of sodium dodecyl sulfate (SDS) stabilized hexadecane emulsion droplets show certain anomalies. These can be resolved when electrical conduction in the stagnant layer behind the shear plane is included in the analysis. If stagnant layer conduction is ignored the addition of salt causes the apparent droplet size to increase and the magnitude of the zeta-potential to show a maximum. When stagnant layer conduction is included the dynamic mobility spectra can be fitted to a constant size distribution independent of the salt concentration with zeta-potentials that decrease as expected with increasing electrolyte concentration. Increasing SDS concentration, before the homogenization process, causes a decrease in droplet size and an increase in the total surface conductance to a constant value corresponding to the saturation of the surface with SDS. It is shown that the surface conductance and particle size distribution of hexadecane at any given volume fraction are functions of the concentration of SDS and the oil volume fraction. The zeta-potential changes log-linearly with added electrolyte and is independent of the SDS concentration or oil volume fraction used during the emulsification process.

The extinction time of a general birth and death process with catastrophes

1986 ◽  
Vol 23 (04) ◽  
pp. 851-858 ◽  
Author(s):  
P. J. Brockwell
Keyword(s):  
Laplace Transform ◽  
Size Distribution ◽  
Sufficient Conditions ◽  
Necessary And Sufficient Conditions ◽  
Death Process ◽  
Extinction Time ◽  
Birth And Death Process ◽  
Different Types ◽  
The Laplace Transform ◽  
Necessary And Sufficient

The Laplace transform of the extinction time is determined for a general birth and death process with arbitrary catastrophe rate and catastrophe size distribution. It is assumed only that the birth rates satisfyλ0= 0,λj> 0 for eachj> 0, and. Necessary and sufficient conditions for certain extinction of the population are derived. The results are applied to the linear birth and death process (λj=jλ, µj=jμ) with catastrophes of several different types.

Macrostructure and microphysics of Saturn's E-ring

1984 ◽  
Vol 75 ◽  
pp. 607-613 ◽  
Author(s):  
Kevin D. Pang ◽  
Charles C. Voge ◽  
Jack W. Rhoads
Keyword(s):  
Size Distribution ◽  
Spherical Shape ◽  
Mie Scattering ◽  
Narrow Size Distribution ◽  
Electrostatic Levitation ◽  
Volcanic Origin ◽  
Micron Diameter

Abstract.All observed optical and infrared properties of Saturn's E-ring can be explained in terms of Mie scattering by a narrow size distribution of ice spheres of 2 - 2.5 micron diameter. The spherical shape of the ring particles and their narrow size distribution imply a molten (possibly volcanic) origin on Enceladus. The E-ring consists of many layers, possibly stratified by electrostatic levitation.

Grain Refinement in Titanium-Erbium Alloys

1974 ◽  
Vol 32 ◽  
pp. 522-523
Author(s):  
B. B. Rath ◽  
J. E. O'Neal ◽  
R. J. Lederich
Keyword(s):  
Electron Microscopy ◽  
Size Distribution ◽  
Grain Refinement ◽  
Grain Growth ◽  
Volume Fraction ◽  
Pure Titanium ◽  
Systematic Investigation ◽  
Second Phase ◽  
Titanium Matrix ◽  
Average Size

Addition of small amounts of erbium has a profound effect on recrystallization and grain growth in titanium. Erbium, because of its negligible solubility in titanium, precipitates in the titanium matrix as a finely dispersed second phase. The presence of this phase, depending on its average size, distribution, and volume fraction in titanium, strongly inhibits the migration of grain boundaries during recrystallization and grain growth, and thus produces ultimate grains of sub-micrometer dimensions. A systematic investigation has been conducted to study the isothermal grain growth in electrolytically pure titanium and titanium-erbium alloys (Er concentration ranging from 0-0.3 at.%) over the temperature range of 450 to 850°C by electron microscopy.

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