Elena P Smirnova

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We have successfully grown high-quality AlN piezoelectric single crystal using the sublimation technique. Transparent crack-free boules of approximately 15 mm in diameter and 25 mm in length along the [0001] direction were obtained, with coloring from amber to dark brown depending on growth temperature. Full sets of material parameters of grown AlN and(More)
The method of high performance liquid chromatography with electrochemical detection (HPLC-ED) is spreading ever more widely as a means of determining the content of monoamines and their metabolites in biological objects [5-7]. However, despite the evident advantages of this approach (high sensitivity, selectivity, comparative ease of reproduction), it has(More)
The balance of catecholamines (CA) and their metabolites in the canine heart during myocardial fibrillation and 1, 2, 3, 4, 5, 6 hours after death was studied. The fibrillation was caused by low myocardial electrostimulation. The comparative neuro-morphometric analysis of the CA-containing structures in 1 and 5 min of the fibrillation and the determination(More)
Recent investigations of the mechanisms of sympathetic regulation of the human heart have been carried out with the aid of modern methods of analysis of levels of catecholamines (CA) and some of their derivatives in the blood [6, 7, 9] and in biopsy material from the myocardium obtained from patients during operations on the heart [7, 8]. However,(More)