Atom-pairs proportions are the transparent quality of a molecule: if molecule has two atoms oxygen and three nitrogen, atom-pair atom1-atom2 can be expressed as code “atom1-atom2-n1-n2,” indicating different their numbers. These codes for group (nitrogen, oxygen, sulfur, phosphorus, fluorine, chlorine, bromine, well double triple covalent bonds) applied to build up so-called optimal molecular d...

The melting of base pairs is a ubiquitous feature of RNA structural transitions, which are widely used to sense and respond to cellular stimuli. A recent study employing solution nuclear magnetic resonance (NMR) imino proton exchange spectroscopy provides a rare base-pair-specific view of duplex melting in the Salmonella FourU RNA thermosensor, which regulates gene expression in response to cha...

The idea that the physical properties of cuticular lipids affect cuticular permeability goes back over 65 years. This proposal has achieved textbook status, despite controversy and the general lack of direct supporting evidence. Recent work supports the standard model, in which lipid melting results in increased cuticular permeability. Surprisingly, although all species studied to date can synt...

Multilayers composed of materials with low Sn and high Si bulk melting points were grown at room temperature by ultrahigh vacuum deposition. Sn Mössbauer spectroscopy has been used to investigate the temperature dependence of the Debye-Waller factor f , the mean-square displacement, and the mean-square velocity of Sn nuclei in ultrathin 10 Å thick -like Sn layers embedded between 50 Å thick Si ...