Extended DLVO theory

Extended-chain crystallinity, 20 398-399 Extended-DLVO theory, 21 668 Extended failures, 26 981 Extended HMO theory (EHT), 16 736 Extended patent families, 18 207 Extended shelf life (ESL) packaged products, 13 32... 

Yotsumoto, H. and Yoon, R.H., Appplication of extended DLVO theory. I. Stability of rutile suspensions, J. Colloid Interf. Sci., 157, 426, 1993. 

Stability of Cloudy Apple Juice Colloidal Particles Modeled with the Extended DLVO Theory... 

The aim of this work was to study the effect of the ionic atmosphere surrounding the particle on the stability of a CAJ suspension, and to predict it with the classical and the extended DLVO theory. 

So far, we are not able to predict the stability of CAJ and CAJ + CR with the extended DLVO theory (Equation 16.6), because values of A and Co are not available to calculate Uh with Equation 16.7. However, we maybe able to estimate Uje and Uh from stability results. Since both juices (CAJ + CR and CAJ) showed the same stability, it means that both juices should have the same lixmax- Combining Equation 16.1, Equation 16.6, and Equation 16.7 this can be expressed as follows ... 

Chang, Y.I. and Chang, P.-K. The role of hydration force on the stability of the suspension of Saccharomyces cerevisiae — application of the extended DLVO theory. Colloids Surfaces A, 211, 67, 2002. 

Many experimental studies have shown DLVO theory is not sufficient to describe particle stability in environmental systems, and additional non-DLVO interactions (hydrophobic/hydrophilic and steric) have been applied to an extended DLVO theory. The unique and size-dependent properties of nanoparticles may require additional modification of DLVO theory to model their interactions in aqueous environments. 

Let us tinaily mention that the assumption of the existence of the three contributions to the total potential energy is known as extended DLVO theory of the stability of colloidal suspensions, as opposed to the classical model, originally developed by Derjaguin and Landau, and Verwey and Overbeek. universally called DLVO theory of stability. 

Yotsumoto, R.-H. Yoon, Application of extended DLVO-theory 1. Stability of rutile suspensions. J. Colloid Interface Sci. 157(2), 426 33 (1993a). doi 10.1006/jcis.1993.1205 Yotsumoto, R.-H. Yoon, Application of extended DLVO-theory 2. Stability of silica suspensions. J. Colloid Interface Sci. 157(2), 434 141 (1993b). doi 10.1006/jcis.1993.1206 J. Zhou, J. Ralston, R. Sedev, D.A. Beattie, Functionalized gold nanoparticles Synthesis, structure and colloid stability. J. Colloid Interface Sci. 331(2), 251-262 (2009). doi 10.1016/j.jcis.2008. 12.002... 

Bostrom, M., V. Deniz, G. V. Franks, and B. W. Ninham. 2006. Extended DLVO theory Electrostatic and non-electrostatic forces in oxide suspensions. Advances in Colloid and Interface Science 123-126 5-15. doi 10.1016/j.cis.2006.05.001. 

Farahat, M., T. Hirajima, K. Sasaki, and K. Doi. 2009. Adhesion of Escherichia coli onto quartz, hematite and corundum Extended DLVO theory and flotahon behavior. Colloids and Surfaces B Biointerfaces 74, no. 1 140-149. doi 10.1016/j.colsurfb.2009.07.009. 

DLV O theory provides a usefiil but imperfect framework for describing the stability of particle dispersions. Various extensions to DLVO theory have been made in order to address the role of additional factors that influence particle behavior, and are generally referred to as extended DLVO theory (Elimelech et al., 1998). One particularly important extension addresses the role of organic chemicals that adsorb to the surface of particles. As addressed below, the adsorption of organic chemicals to a particle may alter the effective particle size and surface charge, and may also serve to hinder the approach of two particles or alternatively the organic may attach to and bridge between particles (Li and Chen, 2012). 

The theory that first accounted for the effect of van der Waals and electrostatic interactions on the stability of particles was proposed inde(>endently by Derjuguin and Landau and then by Verwey and Overbeek in the 1940s (93,94). The theory is now cla.ssical and is known as DLvO theory m their honor, During the lost two decades, a number of experiments and new theoretical approuche.s (13,95,99,100) addressed the completion of the DLVO theory including the third type of interaction (c above), although their ongin was not always easy to understand, as it quantitatively accounted for their effects. These approaches can be classified under the common name of extended DLvO theories. 

Biocolloid deposition and release also is be regulated by DLVO type interactions e.g., Ryan et al., (1999) or through nonelectrostatic mechanisms (hydrophobic bonding in the ca.se of viruses]. Bacteria can attach to immobile surfaces ilmnigh excreted biopolymers (e.g.. Extended DLVO theory) subsequent destruc-... 

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