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Enhancement of Ostwald Ripening by Depletion Flocculation ,, The depletion force can be effected by polymers (for a review see Jenkins and Snowden),22 by micelles,23 and even by colloidal particles of different siz24,25 Our assertion that depletion flocculation is the cause of the enhanced Ostwald ripening rates is based on the following evidenceClarification / Flocculation | Wyeast Laboratories, Zymolectin concentration: The increase of zymolectin concentration in the cell wall causes flocculation to occur Depletion of nutrients, an increase in fermentation by-products, and temperature increases all cause an increase in zymolectin concentration in the cell wallHOME NEWS PUBLICATIONS LECTURES PATENTS ,, C Depletion Flocculation (Asakura & Oosawa, 1958; Sperry et al, 1981) Lower Entropy Higher Entropy When Interparticle Distance Approaches WSP Molecular DimensionsDepletion flocculation of concentrated latex suspensions ,, If depletion flocculation occurs, one would expect that the larger the EO chain length (ie the larger the micelle size), the smaller the 4,, value above which flocculation occurs As we shall see in the next section, this was indeed the caseInfluence of oat components on lipid digestion using an in ,, Depletion ﬂocculation is a well-known instability mechanism that can occur in oil-in-water emulsions when the concentration of non-adsorbed polysaccharide exceeds a ,.
Depletion Flocculation of Beverage Emulsions by Gum Arabic ,, Depletion flocculation was the possible effect due to a large amount of unadsorbed GGM in the continuous phase of emulsions, as previ- ously exhibited by a wide variety of biopolymers (Chanamai .Depletion Flocculation of Beverage Emulsions by Gum Arabic ,, Depletion flocculation led to an increase in creaming instability and apparent viscosity of the emulsions Flocculation could be nondestructively monitored by measuring the decrease in ultra-sonic attenuation of the emulsions These results show that depletion flocculation ,International Journal of Food Properties, A clear separation of the oil phase at low protein contents and destabilizing by depletion flocculation at high protein content were observed Extensive droplet flocculation and coalescence were determined until the pectin concentration reached 05 g/100 g solution for the secondary emulsionGelation and flocculation of casein micelle/carrageenan ,, Depletion flocculation is suggested as a partial explanation for these observations The effects of casein micelles on the viscoelastic properties of iota carrageenan have been measured in the absence of flocculationFlocculation, Flocculation, in the field of chemistry, is a process wherein colloids come out of suspension in the form of floc or flake, either spontaneously or due to the addition of a clarifying agent The action differs from precipitation in that, prior to flocculation, colloids are merely suspended in a liquid and not actually dissolved in a solution.
Flow Assurance Principles in Oil & Gas Industries, The polymeric aggregation of colloidal dispersion of this nature is known as (Depletion Flocculation Mechanism) as described by DH Napper in his book entitled "Polymeric Stabilization of Colloidal Dispersions", Academic Press, New York,1983Associative polymer/latex dispersion phase diagrams II ,, Depletion flocculation could be confirmed by the fact that dilution of the sample with water to below the critical flocculation concentration yielded a well dispersed system An average of 30-40 samples were prepared for each system to define the dispersion and flocculation regions with some precision(PDF) Depletion Flocculation in Colloidal Dispersions, The tendency for depletion flocculation to occur depends on the mo- lecular weight (Mw) and hydrodynamic radius (R h ) of the polymer molecules, which has been described mathematically using .Depletion flocculation and depletion stabilization of ,, Flocculation depletion flocculation erythrocytes erythrocyte stabilization depletion stabilization dextran dextran adsorption by erythrocytes erythrocyte stromata This is a preview of subscription content, log in to check accessINFLUENCE OF XANTHAN AND l, the depletion flocculation, is highly dependent on the ratio of particle radius to polymer radius of gyration, the concentration of particles and the concentration of the dispersed polymer It has been shown that the onset of flocculation occurs above some critical.
Stability of beverages emulsions, Stability of beverages emulsions 1 , polysaccharide in the aqueous phase of emulsions nonabsorbed biopolymers are capable of promoting droplet flocculation through a depletion mechanism Flocculation causes a number of effects that are detrimental to emulsion quality: 1 enhanced creaming due to the increase in particle size 2 decreased .Effect of Dispersed Phase Volume Fraction on Physical ,, stability by different mechanisms like partial flocculation, depletion flocculation and bridg-ing flocculation Since the mentioned mechanism is affected by emulsifier concentration presented in system, the major aim of this study was to investigate the effect of dispersedClustering of Binary Colloidal Suspensions: Theory, flocculation and depletion stabilization of polymer-colloidal systems We have thoroughly examined the binary-particle systems with numerical simulations ,Depletion flocculation in colloidal dispersions ,, Origins of depletion flocculation The first experimental observation of depletion flocculation was reported by Traube [2), whilst investigating the creaming of ,Depletion flocculation in colloidal dispersions, Advances ,, Depletion flocculation in colloidal dispersions Depletion flocculation in colloidal dispersions Jenkins, Paul; Snowden, Martin 1996-11-15 00:00:00 The destabilisation of colloidal dispersions by free, non-adsorbing polymer molecules in solution is reviewed from both a theoretical and experimental perspective Consideration is given to the behaviour of polymers in solution in relation to the ..
Depletion flocculation and thermodynamic incompatibility ,, The stability of whey protein stabilized emulsions, containing methylcellulose added after emulsification in their bulk phase, was investigated The phase diagram of the ternary system whey proteins/methylcellulose/water was first established and used to identify the conditions permitting polymer phase separation within the emulsion bulk phaseStabilization of multiple emulsions using natural surfactants, 3 aqueous phase, leading to fewer and larger caseinate aggregates that are then incapable of inducing depletion flocculation At high R, displacement of protein fromEmulsions: Formation, Stability, Industrial Applications ,, Chapter 9 Flocculation of Emulsions and its PreventionFactors affecting flocculation Calculation of fast and slow flocculation rate Definition of stability ratio and ,Depletion Flocculation | Practical Solubility Science ,, But depletion flocculation is a very significant effect in real-world formulations, so it's worth trying to understand what is going on so you can avoid the problem Depletion Flocculation Particle r nmClustering of Binary Colloidal Suspensions: Experiment, Clustering of Binary Colloidal Suspensions: Experiment MEHRDAD YASREBI, WAN Y SHIH, AND ILHAN A AKSAY , centration appears similar to the depletion flocculation and depletion restabilization phenomena occurring in particle-polymer systems , flocculation rate ,.
Introduction of emulsions Effect of polysaccharides on ,, Depletion flocculation is directly related to the size of polysaccharide coils The center of mass of large polysaccharide molecules are excluded from the thin region adjacent to the droplets surface, the depletion ,Effects of a strong polyelectrolyte on the rheological ,, Strong polyelectrolytes, referred to as superplasticizers, are known to improve the initial fluidity of concentrated cement suspensions To quantify how the polyelectrolytes affect the fluidity, we have studied the effect of a strong anionic polyelectrolyte, melamine formaldehyde sulfonate (MFS), on the zeta potential of cement particles and on the steady-shear and low-amplitude rheological .An investigative study of polymer adsorption onto ,, For colloidal systems with adsorbed polymer, the mechanisms governing stabilization and flocculation are defined by the critical overlap concentration, c* Below c*, steric stabilization or bridging flocculation are viable mechanisms of adsorption, while above c* associative thickening stabilization, depletion stabilization or depletion .Chem550 Spring 06 5, CDepletion Flocculation G = H - T S Lower Total Entropy Higher Total Entropy Non-Adsorbing Polymer Causes Depletion Flocculation & Aggregation Leading to 1) Viscosity Changes 2) Phase Separation (Syneresis) ppt00 22 22 Effect of Particle Flocculation / Aggregation on ViscosityDepletion stabilization and depletion flocculation ,, An approximate theory of depletion stabilization and depletion flocculation (ie, stabilization and flocculation of colloidal particles by polymers in free solution) is presented.