One of the most consequential assumptions classical theories crystal nucleation and growth is Szilard postulate, which states that molecules from a supersaturated phase join nucleus or growing individually. In last 20 years, observations in complex biological, geological, engineered environments have brought to light violations rule, whereby assemble into ordered disordered precursors then host...

In the mol-ecule of the title compound, C(17)H(15)BrO(3), the rings make a dihedral angle of 75.54 (17)°. In the crystal structure, inter-molecular C-H⋯O hydrogen bonds link the mol-ecules into centrosymmetric dimers, and the π-stacked dimers inter-act with neighbouring dimers via C-H⋯π stacking inter-actions.

Fluence response relationships for the induction of DNA damage in the skin of UV-irradiated Xiphophorus fish were obtained by quantitative gel electrophoresis of unlabeled DNA following extraction and treatment with an enzyme preparation that makes single strand breaks next to cyclobutane pyrimidine dimers. A buffer containing 7 M urea minimized the degradation of DNA during extraction and gave...

Fluence response relationships for the induction of DNA damage in the skin of I \ -irradiali-«!Xiphophorus fish were obtained by quantitative gel electrophoresis of unlabeled DNA following extraction and treatment with an enzyme preparation that makes single strand breaks next to cyclobutane pyrimidine dimers. A buffer containing 7 M urea minimized the degradation of DNA during extraction and ...

The frequency with which complex mitochondrial DNA forms occur in DNA extracted from a number of human solid tumors was determined. The catenated forms in all but one sample were within the ranges of frequency reported previously in animal tissue. One sample contained 14%catenated dimers and 10%catenated higher oligomers. Circular dimers were present in 12 of 15 samples, ranging in frequency fr...

Quantitative measurements of the diffusion of adsorbed mixed Ge-Si dimers on the Si(100) surface have been made as a function of temperature using atom-tracking scanning tunneling microscopy. These mixed dimers are distinguishable from pure Si-Si dimers by their characteristic kinetics-a 180 degrees rotation between two highly buckled configurations. At temperatures at which the mixed dimers di...

The registry of bismuth dimers, integral components of the bismuth nanoline on Si(001), is examined. In contrast to the currently accepted view, the bismuth dimers are found to be in registry with the two-dimensional lattice created by the silicon dimers. The consequences of this finding are briefly explored.