Luminescence mechanism and energy transfer in cesium metavanadate CsVO 3

Photoluminescence properties and relaxation dynamics of electronic excitations in cesium vanadate CsVO 3 have been studied upon pulse laser excitation in the wide temperature range of 6.5–300 K. A vibronic structure observed in low-temperature PL spectra is considered and interpreted. Peculiarities of luminescence relaxation dynamics and emission spectra of CsVO 3 along with the appearance of the vibronic structure are explained in terms of strong electron-phonon coupling of excited electronic states and centrosymmetric vibrational modes in [VO 4 ] 3- center. A new approach in an interpretation of luminescence processes in vanadates is demonstrated. © 2019 Elsevier Ltd16.5186.2017/8.9The work was supported by Act 211 Government of the Russian Federation , contract № 02.A03.21.0006 . I.A.W. thanks for financial support Minobrnauki initiative research project № 16.5186.2017/8.9 . Authors thank Dr. Mathijs de Jong (Utrecht University) for his kind assistance in laser experiments and Prof. Boris V. Shulgin for fruitful discussions of this work

Synthesis of New Phosphorylated 1,2,4-Triazole-3-thiones. N,S-Functionalization Methods

© 2018, Pleiades Publishing, Ltd. New phosphorylated 1,2,4-triazole-3-thiones have been synthesized, and the possibility of their N,Sfunctionalization has been demonstrated. The direction of alkylation of 1,2,4-triazole-3-thiones with ethyl acrylate has been shown to depend on the substituent on the N4 atom

STUDY OF STRUCTURAL CHANGES IN THE COLLAGEN MATERIAL MODYFIED BY PLASMA METHODS

A study of changes in the structure of the protein component of natural collagen-containing material was made. By the x-ray diffraction analysis was found that the molecular structure of the protein does not change when a high frequency plasma exposed on a material. The application of nanostructured coatings from the plasma phase also does not change the structure of the substrate

THE BACTERICIDAL EFFECT ON SURFACES TREATED BY HIGH FREQUENCY PLASMA

A study of duration of antimicrobial properties of collagen materials treated in high frequency plasma was made. It is established that the antibacterial effect is retained for not more than two years

RESEARCH OF HYGIENIC PROPERTIES OF POROUS POLYETHYLENE FILMS WITH CaCO3

The complex of hygienic properties of polymeric polyethylene (PE) films with mineral filler СаСО3 is experimentally investigated

RESEARCH OF STRUCTURE OF POROUS POLYETHYLENE FILMS BASED ON A MINERAL FILLER

In the paper, polymer polyethylene films with a mineral filler CaCO3 were studied by gas dynamic porosimetry

Synthesis of New Phosphorylated 1,2,4-Triazole-3-thiones. N,S-Functionalization Methods

© 2018, Pleiades Publishing, Ltd. New phosphorylated 1,2,4-triazole-3-thiones have been synthesized, and the possibility of their N,Sfunctionalization has been demonstrated. The direction of alkylation of 1,2,4-triazole-3-thiones with ethyl acrylate has been shown to depend on the substituent on the N4 atom

Sequences of rDNA internal transcribed spacers from the chloroplast DNA of 26 bryophytes: properties and phylogenetic utility

Abstract We determined the sequence of the region of the chloroplast DNA inverted repeat spanning from the 3P-terminus of the 23S rRNA gene to the 5P-terminus of the tRNAArg(ACG) gene (about 700 bp) from 25 bryophytes and from the charophycean alga Chara australis. Phylogenetic analysis of these sequences using the neighbor-joining method suggests an early dichotomy of bryophytes and their paraphyly relative to the tracheophyte lineage. A monophyly of liverworts (Marchantiidae plus Jungermanniidae), a deep divergence of Metzgeriales among Jungermanniidae and a close affinity of the two subclasses of mosses, Sphagnidae and Andreaeidae, are evident. The branching pattern observed is consistent with the phylogenetic distribution of several prominent indels observed in the alignment