The binding of proflavine to native DNA increased its stability against thermal denaturation as measured by viscometric method. Up to a moderate ionic strength of 0.058 m , the melting temperature of the complex increased almost linearly with the increase of dye concentrations and a saturation was reached when one proflavine molecule was added per four to five DNA-Phosphates {DIP c^0 .2 ). The ...

Quantum photonics technologies, like wavelength division multiplexing (WDM), for high-rate quantum key distribution require narrowband, spectrally tunable single photon emitters. Physical methods that rely on the application of large mechanical strain to epitaxial dots or electric and magnetic fields color centers in 2D metal dichalcogenides provide limited spectral tunability. Here we adopt a ...

introduction: p in soils exists in many complex chemical forms, which differ markedly in their behavior, mobility and resistance to bioavailability in the soils. the total p content of a soil provides little information regarding the behavior of p in the environment. the various forms of p present to a large degree, determine the fate and transport of p in soils. fractionation schemes using dif...

Claudins are a family of integral membrane proteins of the tight junction that are thought to participate in the permeation of solutes across epithelia via the paracellular pathway. Claudin-8 is expressed in the distal renal tubule, which has a characteristically low passive permeability to monovalent cations. To test the hypothesis that claudin-8 plays a role in forming a tight paracellular ba...