Paraffin-Coated Hydrophobic Hemostatic Zeolite Gauze for Rapid Coagulation with Minimal Adhesion

2021 ◽  
Author(s):  
Wenzhao Zhang ◽  
Jianzhou Wu ◽  
Lisha Yu ◽  
Hao Chen ◽  
Dan Li ◽  
...  
Keyword(s):  
Rapid Coagulation

scholarly journals Determination of the Rate of Salt-Induced Rapid Coagulation of Polystyrene Latex Particles in Turbulent Flow Using Small Stirred Vessel

2018 ◽  
Vol 3 (1) ◽  
pp. 5
Author(s):  
Oktaviani Oktaviani ◽  
Yasuhisa Adachi
Keyword(s):  
Ad Hoc ◽  
Coupling Effect ◽  
Particle Diameter ◽  
Polystyrene Latex ◽  
Stirred Vessel ◽  
Colloidal Spheres ◽  
Rapid Coagulation ◽  
Mixing Intensity ◽  
Mixing Rates ◽  
Different Diameters

In our study, we revisited a previously reported method for evaluating the mixing intensity of uniform colloidal spheres in terms of their collision frequency, with the aim of evaluating the validity of this method in the case of a small stirred vessel equipped with an impeller with four paddles. The rates of the salt-induced rapid coagulation of polystyrene latex (PSL) particles with five different diameters were measured as functions of the rotation rate. The ad-hoc assumption of the linear additivity of the perikinetics and the orthokinetics of the coagulation process was used for the analysis. Our previously proposed equation for the rate of turbulent coagulation as a function of the particle diameter, determined for an end-over-end rotation mixing device, was confirmed to be valid. However, it was found that, for small particles and low-mixing rates, i.e., for low Peclet numbers, the rate of coagulation becomes larger than that predicted on the basis of linear additivity because of the coupling effect of Brownian motion and the fluid flow during turbulent mixing. This increase occurred even though the rate was lowered by the wall effect, which resulted in an inhomogeneous distribution of the mixing intensity.

Some comments on von Smoluchowski theory of rapid coagulation

1982 ◽  
Vol 260 (12) ◽  
pp. 1151-1152 ◽  
Author(s):  
H. Gedan ◽  
H. Lichtenfeld ◽  
H. Sonntag
Keyword(s):  
Rapid Coagulation ◽  
Smoluchowski Theory

Drift mechanism of the metal nanowires formation in liquid helium

2019 ◽  
Vol 21 (10) ◽  
pp. 5771-5779 ◽  
Author(s):  
S. V. Stovbun ◽  
A. A. Skoblin
Keyword(s):  
Heat Release ◽  
Liquid Helium ◽  
Metal Nanowires ◽  
Quantum Vortex ◽  
Rapid Coagulation

It is shown theoretically that the mechanism of the rapid coagulation of metal nanospheres into a nanowire in a quantum vortex proposed by E. B. Gordon et al. (Low Temp. Phys., 2010, 36, 590) could not be realized, due to the enormous heat release expelling the nanospheres from the vortex.

Coagulation kinetics and the stability of surfactant-free emulsion-polymerised latexes

e-Polymers ◽  
2005 ◽  
Vol 5 (1) ◽  
Author(s):  
E. Rotimi Sadiku ◽  
Ron D. Sanderson
Keyword(s):  
Dlvo Theory ◽  
Correlation Spectroscopy ◽  
Double Layers ◽  
Stability Factor ◽  
Rapid Coagulation ◽  
Nacl Concentration ◽  
Coagulation Kinetics ◽  
The Stability ◽  
Electric Double Layer Thickness ◽  
Hamaker Constants

AbstractThe stability factor of styrene/sulfopropyl methacrylate (styrene/SPM) and styrene/3-[N,N-dimethyl-N-(methacryloxyethyl)ammonium]propane sulfate (styrene/ SPE) latexes was studied using the classical Derjaguin-Landau-Verwey-Overbeek (DLVO) theory and the critical coagulation concentration, CCC, was deduced for the latexes. Photon correlation spectroscopy was used to study ionic stabilities. The stability factor was determined as the ratio of the rate constant for rapid coagulation to that of slow coagulation, obtained from the coagulation kinetics data. The log-log plot of the stability factor, W, as a function of NaCl electrolyte concentration shows an asymptotic decrease in W of both latexes. DLVO theory was successfully employed, whereby the characteristic properties of the diffuse electric double layers or the Stern layers around latex particles in terms of their Hamaker constants and diffuse potentials were determined. The electric double layer thickness decreases with increasing NaCl concentration. Stability curves revealed a higher CCC value for the styrene/SPM latex than for the styrene/SPE latex, which is in accordance with the higher surface charge density and an indication of a better stability.

scholarly journals The coagulation of smokes and the theory of smoluchowski

1927 ◽  
Vol 116 (775) ◽  
pp. 540-553 ◽  
Keyword(s):  
Experimental Data ◽  
Brownian Motion ◽  
Disperse Systems ◽  
Whole Process ◽  
Rapid Coagulation ◽  
Short Period ◽  
Dispersion Media ◽  
Experimental Errors ◽  
The Difference ◽  
The Moment

In a previous communication it has been shown that smokes are unstable disperse systems which spontaneously coagulate from the moment of formation. In this respect they differ from hydrosols, which are stable normally and coagulate only on the addition of an electrolyte. For these latter systems there is evidence to show that the so-called “rapid coagulation” begins when the complete discharge of the double layer has been effected, and that the particles are brought together mainly by Brownian motion. With smokes, too, chance collision brought about by molecular bombardment is probably the chief factor in aggregation, so that a close analogy between the rapid coagulation of hydrosols and the spontaneous coagulation of smokes would appear to exist. Further, if it is admitted that every chance collision between the particles in the two types of system results in a union, then the equations developed by Smoluchowski for the rate of coagulation of colloids might be expected to be equally valid for smokes after making allowance for the difference in properties of the two dispersion media. Reliable experimental data on sol coagula­tion are not easily obtained, for the process is completed in a relatively short period, but the measurements of Zsigmondy, Westgren, and others show a satisfactory agreement with theory. In a smoke, conditions are more favour­able, for coagulation can be followed at much greater dilutions, so that the whole process is slowed down, and observations may be extended over several hours. On account of the interest presented by the above analogy, and the possibility of testing it quantitatively, we have measured the velocity of coagulation of various smokes by a method which we believe to be free from any serious experimental errors.

The rapid coagulation of graphene oxide on La-doped layered double hydroxides

2017 ◽  
Vol 309 ◽  
pp. 445-453 ◽  
Author(s):  
Jian Wang ◽  
Yinshi Li ◽  
Wanying Chen ◽  
Junxiang Peng ◽  
Jun Hu ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Layered Double Hydroxides ◽  
Rapid Coagulation ◽  
Double Hydroxides ◽  
La Doped

scholarly journals Rapid coagulation of polystyrene latex in a stopped-flow spectrophotometer

1974 ◽  
Vol 49 (2) ◽  
pp. 281-285 ◽  
Author(s):  
J.W.Th Lichtenbelt ◽  
C Pathmamanoharan ◽  
P.H Wiersema
Keyword(s):  
Polystyrene Latex ◽  
Stopped Flow ◽  
Rapid Coagulation

Computer Simulation of Influence of Sedimentation on Rapid Coagulation

2003 ◽  
Vol 20 (9) ◽  
pp. 1634-1636 ◽  
Author(s):  
Sun Zhi-Wei ◽  
Chen Zhi-Ying
Keyword(s):  
Computer Simulation ◽  
Rapid Coagulation
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