37 research outputs found
Predicting Solid-State Heats of Formation of Newly Synthesized Polynitrogen Materials by Using Quantum Mechanical Calculations
We present density functional theory level predictions and analysis of the basic properties of newly synthesized high-nitrogen compounds together with 3,6-bis(2H-tetrazol-5-yl)-1,2,4,5-tetrazine (BTT) and 3,3′-azobis(6-amino-1,2,4,5-tetrazine) (DAAT), for which experimental data are available. The newly synthesized high-nitrogen compounds are based on tricycle fused 1,2,4-triazine and 1,2,4,5-tetrazine heterocycles. In this work, the molecules BTT and DAAT have been studied in order to validate the theoretical approach and to facilitate further progress developments for the molecules of interest. Molecular structural properties are clarified, and IR spectra predictions are provided to help detection of those compounds in the experiment. The energy content of the molecules in the gas phase is evaluated by calculating standard enthalpies of formation, by using a special selection of isodesmic reaction paths. We also include estimates of the condensed-phase heats of formation and heats of sublimation in the framework of the Politzer approach. The obtained properties are consistent with those new high-nitrogen compounds being a promising set of advanced energetic materials
First-principles combinatorial design of transition temperatures in multicomponent systems: The case of Mn in GaAs
ORGANIZATION OF TREATMENT OF CHILDREN WITH SPASTIC FORMS OF CEREBRAL PALSY BY BOTULINUM TOXIN TYPE A IN KRASNODAR REGION
This article presents the organizacion of treatment for children with cerebral palsy with the botulinum toxin type A in large children’s therapeutic and prophylactic institutions in Krasnodar region. Such organization allows to cover the treatment of about 20 % of children with spastic forms of cerebral palsy, to ensure the purity of performance technique and to provide adequate rehabilitation