Lattice dynamics of ß-V2O5: Raman spectroscopic insight into the atomistic structure of a high-pressure vanadium pentoxide polymorph.

We report here the Raman spectrum and lattice dynamics study of a well-crystallized ß-V(2)O(5) material prepared via a high-temperature/high-pressure (HT/HP) route, using α-V(2)O(5) as the precursor. Periodic quantum-chemical density functional theory calculations show good agreement with the experimental results and allow one to assign the observed spectral features to specific vibrational modes in the ß-V(2)O(5) polymorph. Key structure-spectrum relationships are extracted from comparative analysis of the vibrational states of the ß-V(2)O(5) and α-V(2)O(5) structures, and spectral patterns specific to the basic units of the two V(2)O(5) phases are proposed for the first time. Such results open the way for the use of Raman spectroscopy for the structural characterization of vanadium oxide-based host lattices of interest in the field of lithium batteries and help us to greatly understand the atomistic mechanism involved in the α-to-ß phase transition of vanadium pentoxide.

[Medicosocial aspects of thermal injuries in patients with hemocontact viral infection].

The social structure of patients of the burns unit in 2008 year, hospitalized with hemocontact viral infections (HVI), was analyzed. 764 patients were treated, HVI was diagnosed in 103 of them. Men had HVI two times more often then women. The possibility of HVI was higher in patients with fire burns. The lager the burn area was, the higher was the possibility of HVI detection. Patients with HVI were reliably younger with average age of 33.1 years; the majority of them were unemployed. The most socially problematic group was represented by patients with mixed HVI--unemployed youngsters of the capable age, the majority of them were drug addict.

Peculiarities of brain information processing in persons with different serotonin transporter gene variants.

Association of brain processes presumably underlying aggression with serotonin transporter gene polymorphism in men was studied. Carriers of more active gene variant are characterized by higher aggression index, increased component of brain potential mismatch negativity responsible for automatic difference detection, and decreased P300 component characterizing involuntary attention and cognitive control.