Dissociating stable nitrogen molecules under mild conditions by cyclic strain engineering.

All quiet on the nitrogen front. The dissociation of stable diatomic nitrogen molecules (N) is one of the most challenging tasks in the scientific community and currently requires both high pressure and high temperature. Here, we demonstrate that N can be dissociated under mild conditions by cyclic strain engineering.

Analyses of Ferrous and Ferric State in Dynabi Using Mössbauer Spectroscopy.

Antianemic medicament ferrous gluconate, ferrous fumarate, and a Dynabi tablet with a basic iron bearing ingredient were studied with the use of Mössbauer spectroscopy. Room temperature spectra of ferrous gluconate gave clear evidence that the two phases of iron were present: ferrous (Fe) as a major one with a contribution at and above 91 a.u.

Synthesis of nanocrystalline bismuth and its application to the detection of trace metals.

Surface modified carbon strip electrode with Bi nanopowder was suggested for a simultaneous analysis of Zn, Cd, and Pb ions by a square wave anodic stripping voltammetry, and the influence of the modifying Bi mass and particle size on the trace metal response was investigated. The Bi nanopowders with various particle size distributions were synthesized by an optimization of the gas condensation condition, in which a refractory crucible was applied for the evaporation of volatile Bi, and then immobilized on the surface of a working electrode. The result of the stripping measurements shows that when the modifying mass and the particle size of the Bi powder were in the range of 2 to 5 microg/cm2 and less than 300 nm, respectively, a well-developed and reproducible stripping response was obtained.