Picric acid has a tendency to form stable picrate compounds with various organic molecules due to the presence of active electron cloud and ionic bonds (Yamaguchi et al., 1988). In the past two decades, organic nonlinear optical (NLO) picrate crystals have attracted the scientists and technologists due to their potential applications in the area of photonics including optical information proces...

One mechanism of silver resistance in microorganisms is accumulation of the metal ions in the cell. Here, we report on the phenomenon of biosynthesis of silver-based single crystals with well-defined compositions and shapes, such as equilateral triangles and hexagons, in Pseudomonas stutzeri AG259. The crystals were up to 200 nm in size and were often located at the cell poles. Transmission ele...

Fine structure, location and size of the core of 12 calcium oxalate monohydrate (COM) papillar calculi from different 'idiopathic' stone-formers were studied by an optical and scanning electron microscope equipped with the EDAX analytical device. Each individual core exhibited a unique overall structure composed of loosely arranged twined and intergrown crystals of plate-like and/or columnar sh...