Electrostatics in aqueous media is commonly understood in terms of screened Coulomb interactions, where like-charged objects, such as polyelectrolytes, always repel. These intuitive expectations are based on mean field theories, such as the Poisson-Boltzmann formalism, which are routinely used in colloid science and computational biology [Israelachvili, J. (1992) Intermolecular and Surface Forc...

We study the distribution of multivalent counterions next to a dielectric slab, bearing a quenched, random distribution of charges on one of its solution interfaces, with a given mean and variance, both in the absence and in the presence of a bathing monovalent salt solution. We use the previously derived approach based on the dressed multivalent-ion theory that combines aspects of the strong a...

Various novel palladium(II) complexes with tunable chiral and achiral anionic counterions have been prepared from dialkylpalladium(II) agents and characterized by NMR spectroscopy and X-ray diffraction.

Y-box proteins bind DNA and RNA and are characterized by a cold shock domain and a carboxyl-terminus containing clusters of aromatic and basic residues that alternate with clusters of acidic residues. Y-box proteins 1 and 3 in mouse testis were cloned here by 3' rapid amplification of cDNA ends (RACE) using a degenerate primer. Northern blots and reverse transcription-polymerase chain reaction ...

We present a general thermodynamic picture of the folding of RNA-like heteropolymer based on the basic physical principles. The Hamiltonian of the model includes all characteristic interactions explicitly. A particular attention is paid to the electrostatic interactions whose role in the RNA folding is known to be crucial. In this paper we study RNA folding with the full Hamiltonian and describ...

In membranes, the chirality of the amphiphile constituents is sometimes expressed at a supramolecular scale of nanometers or micrometers. We have recently reported that membranes of nonchiral dicationic n-2-n amphiphiles can also be chirally twisted upon interacting with chiral tartrate counterions. Here, we demonstrate that the mechanism of the chiral induction by counterions involves specific...

The main objective of the intended research was to ascertain toxic effects Lead salts (PbCl2 and PbNO3) in two seasons varying temperatures Indian subtropical region Bhopal. toxicity test carried out at concentrations 250, 300, 350, 400,450, 500 mg.l-1 for determination LC 50 PbCl2 PbNO4 summer high temperature (HT) winter with low temperature(LT) conditions common carp (Cyprinus carpio). value...