Secondary electroviscous effect. Paths of approach of two charged spheres in a viscous medium

1969 ◽  
Vol 73 (4) ◽  
pp. 1062-1065 ◽  
Author(s):  
John Blachford ◽  
F. S. Chan ◽  
D. A. I. Goring
Keyword(s):  
Viscous Medium ◽  
Electroviscous Effect ◽  
Charged Spheres

scholarly journals Engineering a light-driven cyanine based double molecular rotor to enhance the sensitivity towards the viscous medium.

2021 ◽  
Author(s):  
Vishal Kachawal ◽  
Abhilasha Srivastava ◽  
Sumukh Thakar ◽  
Maria Zubiria-Ulacia ◽  
Diplesh Gautam ◽  
...  
Keyword(s):  
Viscous Medium ◽  
Molecular Rotor ◽  
Enhanced Sensitivity

This article describes the enhanced sensitivity to the viscous medium by a molecular rotor based fluorophore (RBF), TPSI I. The TPSI I molecule is designed in such a way that...

scholarly journals Sucrose solution as a new viscous test fluid with tunable viscosities up to 2 Pas for micromixing characterization by the Villermaux–Dushman reaction

2021 ◽  
Author(s):  
Elias Arian ◽  
Werner Pauer
Keyword(s):  
Sucrose Solution ◽  
Viscous Medium ◽  
Stirred Tank ◽  
Test Fluid ◽  
Tank Reactor ◽  
Experimental Implementation ◽  
Sucrose Solutions ◽  
Viscous Solution ◽  
First Time ◽  
Dushman Reaction

AbstractFor the first time, micromixing characterization for the Villermaux–Dushman reaction could be performed with a non-reactive viscous medium at viscosities up to 2 Pas. As viscous medium, sucrose solution was used with the benefit of being a Newtonian fluid with tuneable viscosity. Due to the higher viscosities in comparison to established media for micromixing investigations, a new protocol for the experimental implementation was developed. Micromixing experiments were conducted and the applicability of viscous sucrose solutions was proven in a stirred tank reactor. Major challenges in characterizing micromixing efficiency in high viscous solution were consolidated.

The primary electroviscous effect: Measurements on silica sols

1990 ◽  
Vol 134 (1) ◽  
pp. 169-173 ◽  
Author(s):  
E.P Honig ◽  
W.F.J Pünt ◽  
P.H.G Offermans
Keyword(s):  
Electroviscous Effect ◽  
Silica Sols

scholarly journals The nanofluidic confinement apparatus: studying confinement-dependent nanoparticle behavior and diffusion

2018 ◽  
Vol 9 ◽  
pp. 301-310 ◽  
Author(s):  
Stefan Fringes ◽  
Felix Holzner ◽  
Armin W Knoll
Keyword(s):  
Polymer Surface ◽  
Diffusion Constant ◽  
Numerical Aperture ◽  
Lateral Diffusion ◽  
Vertical Position ◽  
Detection Accuracy ◽  
Illumination Time ◽  
Electroviscous Effect ◽  
Position Detection ◽  
Hydrodynamic Effects

The behavior of nanoparticles under nanofluidic confinement depends strongly on their distance to the confining walls; however, a measurement in which the gap distance is varied is challenging. Here, we present a versatile setup for investigating the behavior of nanoparticles as a function of the gap distance, which is controlled to the nanometer. The setup is designed as an open system that operates with a small amount of dispersion of ≈20 μL, permits the use of coated and patterned samples and allows high-numerical-aperture microscopy access. Using the tool, we measure the vertical position (termed height) and the lateral diffusion of 60 nm, charged, Au nanospheres as a function of confinement between a glass surface and a polymer surface. Interferometric scattering detection provides an effective particle illumination time of less than 30 μs, which results in lateral and vertical position detection accuracy ≈10 nm for diffusing particles. We found the height of the particles to be consistently above that of the gap center, corresponding to a higher charge on the polymer substrate. In terms of diffusion, we found a strong monotonic decay of the diffusion constant with decreasing gap distance. This result cannot be explained by hydrodynamic effects, including the asymmetric vertical position of the particles in the gap. Instead we attribute it to an electroviscous effect. For strong confinement of less than 120 nm gap distance, we detect the onset of subdiffusion, which can be correlated to the motion of the particles along high-gap-distance paths.

scholarly journals A graphical solution of a differential equation with application to hill’s treatment of nerve excitation

1937 ◽  
Vol 123 (832) ◽  
pp. 382-395 ◽  
Keyword(s):  
Viscous Medium ◽  
Graphical Solution ◽  
Initial Value ◽  
First Order ◽  
Rate Dependent ◽  
Monomolecular Reaction ◽  
Constant Coefficients ◽  
Linear Differential ◽  
Physical And Chemical ◽  
Nerve Excitation

Linear differential equations with constant coefficients are very common in physical and chemical science, and of these, the simplest and most frequently met is the first-order equation a dy / dt + y = f(t) , (1) where a is a constant, and f(t) a single-valued function of t . The equation signifies that the quantity y is removed at a rate proportional to the amount present at each instant, and is simultaneously restored at a rate dependent only upon the instant in question. Familiar examples of this equation are the charging of a condenser, the course of a monomolecular reaction, the movement of a light body in a viscous medium, etc. The solution of this equation is easily shown to be y = e - t / a { y 0 = 1 / a ∫ t 0 e t /a f(t) dt , (2) where y 0 is the initial value of y . In the case where f(t) = 0, this reduces to the well-known exponential decay of y .

The Electroviscous Effect in the MBBA Liquid Crystal

1978 ◽  
Vol 17 (9) ◽  
pp. 1525-1530 ◽  
Author(s):  
Tsutomu Honda ◽  
Tadashi Sasada ◽  
Kaoru Kurosawa
Keyword(s):  
Liquid Crystal ◽  
Electroviscous Effect

Displacement of a rigid rod in a viscous medium

1994 ◽  
Vol 68 (5) ◽  
pp. 718-721
Author(s):  
F. L. Shevchenko ◽  
Z. E. Filer ◽  
V. S. Pashchenko ◽  
L. A. Solodova
Keyword(s):  
Viscous Medium ◽  
Rigid Rod

Biophysics of flagellar motility

1979 ◽  
Vol 12 (2) ◽  
pp. 103-180 ◽  
Author(s):  
Jacob J. Blum ◽  
Michael Hines
Keyword(s):  
Viscous Medium ◽  
Hydrodynamic Interactions ◽  
Eukaryotic Cells ◽  
Flagellar Motility ◽  
Muscle System ◽  
Structured Products ◽  
Filament System ◽  
Complex Organization ◽  
Propagating Waves ◽  
Sudden Appearance

One feature characterizing the transition from prokaryote to eukaryote is the ‘sudden’ appearance of centrioles and their highly structured products, the typical eukaryotic flagella and cilia. These mechanochemical systems appear as fully developed machines, containing some 200 diffierent proteins (Luck et al. 1978) arranged in a remarkably complex organization which has undergone little modification since the advent of the first eukaryotic cells. It is now well established (see, for example, Satir, 1974) that ciliary and flagellar motility is based on a sliding filament mechanism that superficially resembles the far more extensively studied sliding filament system of striated skeletal muscle.The flagellar system, however, appears to be much more complex than the muscle system, because it does not ‘merely’ shorten and generate force, but develops propagating waves and exerts its effects via hydrodynamic interactions with a viscous medium.

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