The Effect of Simulation Cell Size on the Diffusion Coefficient of an Ionic Surfactant Aggregate

2018 ◽  
Vol 80 (3) ◽  
pp. 248-254 ◽  
Author(s):  
N. A. Volkov ◽  
M. V. Posysoev ◽  
A. K. Shchekin
Keyword(s):  
Diffusion Coefficient ◽  
Cell Size ◽  
Ionic Surfactant ◽  
Simulation Cell

scholarly journals Solid-State Foaming of Acrylonitrile-Butadiene-Styrene/Recycled Polyethylene Terephthalate Using Carbon Dioxide as a Blowing Agent

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 291 ◽  
Author(s):  
Dong Eui Kwon ◽  
Byung Kyu Park ◽  
Youn-Woo Lee
Keyword(s):  
Diffusion Coefficient ◽  
Solid State ◽  
Cell Size ◽  
Polyethylene Terephthalate ◽  
Acrylonitrile Butadiene Styrene ◽  
Cell Size Distribution ◽  
Blowing Agent ◽  
Recycled Polyethylene ◽  
Foaming Temperature ◽  
Butadiene Styrene

In this study, a single paragraph of acrylonitrile-butadiene-styrene (ABS)/recycled polyethylene terephthalate (R-PET) polymeric foams is prepared using CO2 as a blowing agent. First, the sorption kinetics of subcritical and supercritical CO2 are first studied at saturation temperatures from –20 to 40 °C and a pressure of 10 MPa, in order to estimate the diffusion coefficient and the sorption amount. As the sorption temperature increases, the diffusion coefficient of CO2 increases while the sorption amount decreases. Then, a series of two-step solid-state foaming experiments are conducted. In this process, a specimen is saturated with liquid CO2 and foamed by dipping the sample in a high-temperature medium at 60 to 120 °C. The effects of foaming temperature and depressurization rate on the morphology and structure of ABS/R-PET microcellular foams are examined. The mean cell size and the variation of the cell size distribution increases as the foaming temperature and the depressurization rate increases.

scholarly journals An ab initio molecular dynamics study of D2 dissociation on CO-precovered Ru(0001)

2016 ◽  
Vol 18 (31) ◽  
pp. 21190-21201 ◽  
Author(s):  
M. Wijzenbroek ◽  
G. J. Kroes
Keyword(s):  
Molecular Dynamics ◽  
Ab Initio ◽  
Cell Size ◽  
Energy Exchange ◽  
Ab Initio Molecular Dynamics ◽  
Hydrogen Dissociation ◽  
Simulation Cell

In dynamics studies of hydrogen dissociation on CO pre-covered Ru(0001) the simulation cell size is important for describing energy exchange.

Spindle scaling mechanisms

2020 ◽  
Vol 64 (2) ◽  
pp. 383-396
Author(s):  
Lara K. Krüger ◽  
Phong T. Tran
Keyword(s):  
Cell Size ◽  
Spindle Assembly ◽  
Dependent Manner ◽  
Post Translational Modification ◽  
Size Dependent ◽  
A Cell ◽  
Chromosome Separation ◽  
Spindle Elongation ◽  
Protein Gradients ◽  
Spindle Structure

Abstract The mitotic spindle robustly scales with cell size in a plethora of different organisms. During development and throughout evolution, the spindle adjusts to cell size in metazoans and yeast in order to ensure faithful chromosome separation. Spindle adjustment to cell size occurs by the scaling of spindle length, spindle shape and the velocity of spindle assembly and elongation. Different mechanisms, depending on spindle structure and organism, account for these scaling relationships. The limited availability of critical spindle components, protein gradients, sequestration of spindle components, or post-translational modification and differential expression levels have been implicated in the regulation of spindle length and the spindle assembly/elongation velocity in a cell size-dependent manner. In this review, we will discuss the phenomenon and mechanisms of spindle length, spindle shape and spindle elongation velocity scaling with cell size.

Brief-Measurements of Vapor Diffusion Coefficient

1954 ◽  
Vol 46 (11) ◽  
pp. 47-49 ◽  
Author(s):  
C.Y. Lee ◽  
C.R. Wilke
Keyword(s):  
Diffusion Coefficient ◽  
Vapor Diffusion
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