Modeling bacterial adhesion onto nanostructured silicon carbide using a new physicochemical approach: Statistical physics analysis.

Adhesion of Sphingomonas sp. GY2B onto montmorillonite: A combination study by thermodynamics and the extended DLVO theory

Interpretation of adhesion behaviors between bacteria and modified basalt fiber by surface thermodynamics and extended DLVO theory.

This article reviews the mechanisms of bacterial adhesion to biomaterial surfaces, the factors affecting the adhesion, the techniques used in estimating bacteria-material interactions and the models that have been developed in order to predict adhesion. The process of bacterial adhesion includes an initial physicochemical interaction phase and a late molecular and cellular one. It is a complicated process influenced by many factors, including the bacterial properties, the material surface characteristics, the environmental factors, such as the presence of serum proteins and the associated flow conditions. Two categories of techniques used in estimating bacteria-material interactions are described: those that utilize fluid flowing against the adhered bacteria and counting the percentage of bacteria that detach, and those that manipulate single bacteria in various configurations which lend themselves to more specific force application and provide the basis for theoretical analysis of the receptor-ligand interactions. The theories that are reviewed are the Derjaguin-Landau-Verwey-Overbeek (DLVO) theory, the thermodynamic approach and the extended DLVO theory. Over the years, significant work has been done to investigate the process of bacterial adhesion to biomaterial surfaces, however a lot of questions still remain unanswered.

Mycobacterium phlei has very good potential as a hematite flotation collector. The flotation recovery of hematite is dependent upon the solution pH and concentration of the microorganism. The critical pH for maximum recovery of hematite is around three, which corresponds to the point of zero charge of the microorganism. An excellent correlation between the flotation recovery and bacterial adhesion on hematite is observed. The adhesion of Mycobacterium phlei on hematite can be described by the potential energy of interaction calculations using an extended DLVO theory.

Bacterial adhesion on the metal-polymer composite coatings

Thermodynamic analysis and modeling of water vapor adsorption isotherms of roasted specialty coffee (Coffee arabica L. cv. Colombia)

Influence of surface energy of modified surfaces on bacterial adhesion

Influence of reducers on nanostructure and surface energy of silver coatings and bacterial adhesion

Effect of corrosion rate and surface energy of silver coatings on bacterial adhesion

Diamond-like carbon (DLC) films, especially modified DLC films with doped elements as biomaterials for medical devices have been attracting great interest. In this article, the bacterial adhesion behavior on DLC films, Si-doped DLC films, and stainless steel 316L was investigated with Pseudomonas aeruginosa ATCC 33347, which frequently causes medical device-associated infections. This was done under laminar flow conditions in a flow chamber at 37 degrees C. The contact angles of the coatings and the biofilm were measured. Polar liquids of distilled water and ethylene glycol, and apolar liquid of diiodomethane were used as a probe for surface free energy calculations. The electron donor component gamma(-) of surface energy of Si-doped DLC films increased with increasing the silicon content in the DLC films. The experimental results showed that the surface energy of the coatings and the interaction energy between the coatings and bacteria in water had significant influences on bacterial adhesion. The extended DLVO theory was used to explain the adhesion behavior.

Adhesion of Bacillus subtilis on kaolinite, montmorillonite, and goethite was investigated over a wide range of ionic strength (IS) and pH using batch experiment. The related surface properties (size, zeta potential, and hydrophobicity) under varying conditions were systematically determined and the interaction energy between the cell and minerals were calculated using the extended Derjaguin, Landau, Verwey, and Overbeek (ExDLVO) theory. Adhesion on kaolinite and montmorillonite increased with IS at low level (< 0.01 mol L−1 MgCl2) but declined at high IS level. An increase in IS generally depressed bacterial adhesion on goethite. Elevated pH resulted in decreasing the adhesions on all three minerals. The IS- and pH-effects on adhesion for phyllosilicate systems followed the ExDLVO predictions. For goethite systems, this theory predicted the adhesion trend with IS and that under basic pH, but failed to explain the adhesion at low pH. Such deviation from the theory possibly resulted from chemical interactions between extracellular polymeric substances on cell surface and goethite. These results imply that bacterial adhesions on phyllosilicates are primarily governed by the ExDLVO interactions, and those on iron oxides are mediated by the combination of ExDLVO and non-ExDLVO interactions.

Efficient treatment of lead-containing wastewater by hydroxyapatite/chitosan nanostructures

Studies on bitumen–silica interaction in surfactants and divalent cations solutions by atomic force microscopy

Selective adsorption and separation of organic dyes from aqueous solution on polydopamine microspheres

In-situ monitoring of the unstable bacterial adhesion process during wastewater biofilm formation: A comprehensive study