The transition-metal perovskites SrFel.,Cox03 (0 i x 51) are of a great interest because the high oxidation states of the transition-metal (Fe(IV), Co(N)) can be stabilized. Moreover these compounds exhibit interesting magnetic properties. These oxygen stoichiometric phases have been prepared only under high oxygen pressures. A novel preparation method of these phases has been investigated usin...

In the analysis of time-reversal and Mossbauer absorption experiments, it is important to consider atomic processes which interfere with the dllect nuclear transition. Interaction of the photon with the atomic electrons causes the radiation to acquire a phase shift,-specified by the interference parameter s(L1T). We present theoretical expressions for 5 and compare our calculated values with ex...

Several observations of the Nb long-lived Mossbauer phenomena are presented, in consequence of an irradiation increased by an order of magnitude compared with previous work. These are 1) two β decays of 182Ta and 92mNb are enhanced, i.e., 182Ta is now 200 times faster than in previous results while 92mNb is twice as fast as normal; 2) γs emitted from two β decays compete to eject electrons in a...

the ir and nmr spectra were coupled with quantum chemical calculations in dft approach usingthe hybrid b3lyp exchange-correlation functional to confirm the structure of 2-methoxycarbonyl-7-methyl-1,3-thiazino[3,2-b][1,2,4]triazine-4,8-dione 2d.

Characterization of heme oxidation products falls naturally into two categories: species resulting from electron transfer, and in vivo and in vitro heme degradation products formed by oxidative addition or cleavage. In the former, we propose to include the intermediates appearing during the catalytic cycles of catalase (Cat), horseradish peroxidase (HRP), and cytochrome c peroxidase; the latter...