Like-charged colloidal spheres dispersed in de-ionized water are supposed to repel each other. Instead, artifact-corrected video microscopy measurements reveal an anomalous long-ranged like-charge attraction in the interparticle pair potential when the spheres are confined to a layer by even a single-charged glass surface. These attractions can be masked by electrostatic repulsions at low ionic...

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The high linear charge density of 20-base-pair oligomers of DNA is shown to lead to a striking nonmonotonic dependence of the long-time self-diffusion on the concentration of DNA in low-salt conditions. This generic nonmonotonic behavior results from the strong coupling between the electrostatic and solvent-mediated hydrodynamic interactions, from the renormalization of these electrostatic inte...

Aminoglycoside antibiotics interact with seemingly unrelated families of RNA molecules. They bind to 16S ribosomal RNA and interfere with the decoding mechanism by distorting the codon-anticodon recognition.1,2 Similar aminoglycosides specifically inhibit self-splicing group I introns3 and the hammerhead ribozyme.4 Recently, these antibiotics have been found to competitively block the binding o...

Recently, there has been a concerted effort to implement advanced classical potential energy surfaces by adding higher order multipoles to fixed point charge electrostatics in a bid to increase the accuracy of simulations of condensed phase systems. One major hurdle is the unwieldy nature of the expressions which in part has limited developers mostly to including only dipoles and quadrupoles. I...

2014 Electrostatic interactions in an aqueous medium are analysed with amphiphile-water systems as models. It is concluded that the mean field Poisson-Boltzmann approximation is often adequate to describe electrostatic effects in ionic systems particularly with monovalent counterions. Two approximations inherent in the Poisson-Boltzmann equation are discussed in detail: (i) the neglect of ion-i...

Electrostatic interactions are important in food systems, and modeling these systems correctly can lead to insights into their structure and dynamics when electrostatic interactions are correctly included. Here we give a brief review of electrostatics relevant to food systems, and discuss ways of approximating the electric fields and potentials. We emphasize the importance of correctly represen...