Anodic synthesis and molecular structure of dodecaethylhexaamidobisphosphonium diperchlorate

The electrochemical oxidation of hexaethyl triamidophosphite in the absence of nucleophiles specially introduced into the electrolyte was studied by anodic voltamperometry and preparative electrolysis. The reversible one-electron oxidation of the triamidophosphite molecule gives an unstable radical-cation, which reacts with a molecule of the starting compound to give a dimeric radical-cation, whose subsequent oxidation leads to dodecaethylhexaamidobisphosphonium diperchlorate. This product is the first example of an acyclic, doubly charged bisphosphonium cation with a {Mathematical expression}. The crystal structure of this compound was obtained by x-ray diffraction structure analysis. © 1990 Plenum Publishing Corporation

Blood Cell Morphology and Plasma Biochemistry of Captive Mauremys caspica (Gmelin, 1774) and Mauremys rivulata (Valenciennes, 1833)

Morphological characteristics of peripheral blood cells, micronucleated erythrocyte counts and plasma biochemistry profile were examined in fourteen healthy captive Mauremys caspica and in twenty-three Mauremys rivulata. The size of erythrocyte cells were 19.07 × 11.68 μm and 19.76 × 11.44 μm for M. caspica and M. rivulata, respectively. Nucleus sizes were 6.50 × 5.30 μm for M. caspica and 6.79 × 5.45 μm for M. rivulata. The micronucleated erythrocyte (MNE) values were 0.0008 and 0.0037 for the males and females of M. caspica, respectively. The MNE values were 0.0002 for male and female M. rivulata. We found sex-dependent differences only in the Ca value in the blood biochemistry profile for healthy M. caspica. Sex-dependent differences were found only in albumin and P values in the blood biochemistry profile for healthy M. rivulata. No significant differences were found between males of both species in question with respect to plasma biochemistry values. However, only plasma total protein and Ca content levels differed significantly between the females of the two species

Blood Cell Morphology and Plasma Biochemistry of the Captive European Pond Turtle Emys orbicularis

The morphological characteristics of peripheral blood cells, micronucleated erythrocytes counts and plasma biochemistry profile were examined in ten healthy captive European pond turtles Emys orbicularis. Blood samples were obtained from the caudal vein. The Wright staining method was used for the classification of the blood cells. Mature erythrocytes of captive Emys orbicularis were nucleated ellipsoidal cells (21.7 ±1.27μm × 13.2 ±1.12 μm) with pink cytoplasm. The nucleus (6.9 ± 0.78 μm × 5.4 ± 0.65 μm) was centrally located and stained dark purple. Seven different types of blood cells were determined: erythrocytes, thrombocytes, monocytes, eosinophils, basophils, lymphocytes and heterophils. The micronucleated erythrocyte (MNE) values were 0.0016 and 0.003 for the males and females, respectively. The MNE results were presented as the mean frequency of micronucleated erythrocytes per 1000 cells per animal. The mean plasma concentrations in the total of specimens were as follows: total protein (25 g/L), albumin (7.2 g/L), globulin (17.8 g/L), glucose (2.91 mmol/L), calcium (2.32 mmol/L), phosphorus (1.55 mmol/L), creatinine (46.85 μmol/L), urea (10.93 mmol/L) , triglycerides (0.44 mmol/L), cholesterol (1.48 mmol/L), sodium (125.76 mmol/L), potassium (3.98 mmol/L), chloride (93.94 mmol/L), iron (13.34 μmol/L) and activities of aspartate aminotransferase (2.14 μkat/L), alanine aminotransferase (0.15 μkat/L), gamma glutamyl transpeptidase (2.15 U/L), amylase (8.09 μkat/L), lactate dehydrogenase (19.93 μkat/L). We found sex-dependent differences only in ALT [(0.21 μkat/L and 0.10 μkat/L for the males and females, respectively) (t = 3,107; df = 14; p Emys orbicularis. We suggest that the biochemical profile described in the present study may be used as a standard profile for healthy Emys orbicularis kept in captivity

Quantum walks: a comprehensive review

Quantum walks, the quantum mechanical counterpart of classical random walks, is an advanced tool for building quantum algorithms that has been recently shown to constitute a universal model of quantum computation. Quantum walks is now a solid field of research of quantum computation full of exciting open problems for physicists, computer scientists, mathematicians and engineers. In this paper we review theoretical advances on the foundations of both discrete- and continuous-time quantum walks, together with the role that randomness plays in quantum walks, the connections between the mathematical models of coined discrete quantum walks and continuous quantum walks, the quantumness of quantum walks, a summary of papers published on discrete quantum walks and entanglement as well as a succinct review of experimental proposals and realizations of discrete-time quantum walks. Furthermore, we have reviewed several algorithms based on both discrete- and continuous-time quantum walks as well as a most important result: the computational universality of both continuous- and discrete- time quantum walks.Comment: Paper accepted for publication in Quantum Information Processing Journa

CATHODOLUMINESCENCE OF ALUMINUM OXYNITRIDE Al5O6N WITH DOUBLE DOPING BY RARE-EARTHED IONS

Pulsed cathodoluminescence of aluminum oxynitride Al5O6N doped with Er3+, Ho3+ and Ho3+, Tm3+ ions has been measured. The narrow lines registered at 460, 480 and 663 nm are related to 1D2→3F4, 1G4→3H4 transitions in Tm3+ ion and 5F5→6I8 transition in Ho3+ ion.Работа выполнена при поддержке Российского Фонда Фундаментальных Исследований (проект РФФИ № 17-03-00630_а)

THERMOLUMINESCENT DETECTOR BASED ON ALUMINUM OXYNITRIDE Al5O6N:Ce3+

The new working medium for thermoluminescent dosimetry based on Сe-doped aluminum oxynitride has been proposed. It has a number of advantages for radiation monitoring due to low temperature of main dosimetric peak, high luminescence quantum yield and upper limit of linear dose dependence range at 60 Gy

NEW OPTICAL MATERIALS BASED ON ALUMINUM OXYNITRIDE

Aluminum oxynitride is a promising compound for creating optical ceramics for designing phosphors, LED components and radiation detectors. Our research is focused on luminescent properties of Ce- and Eu-doped aluminum oxynitride Al5O6N

Optical Properties and Upconversion Luminescence of BaTiO3 Xerogel Structures Doped with Erbium and Ytterbium

Erbium upconversion (UC) photoluminescence (PL) from sol-gel derived barium titanate (BaTiO3:Er) xerogel structures fabricated on silicon, glass or fused silica substrates has been studied. The fabricated structures under continuous-wave excitation at 980 nm and nanosecond laser excitation at 980 and 1540 nm demonstrate room temperature PL with the bands at 410, 523, 546, 658, 800 and 830 nm, which correspond to the 2H9/2 → 4I15/2, 2H11/2 → 4I15/2, 4S3/2 → 4I15/2, 4F9/2→ 4I15/2 and 4I9/2→ 4I15/2 transitions in Er3+ ions. The intensity of erbium UС PL increases when an additional macroporous layer of strontium titanate is used beneath the BaTiO3 xerogel layer. It is enhanced for BaTiO3 xerogel films codoped with erbium and ytterbium (BaTiO3:Er,Yb). The redistribution of the intensity of the PL bands is observed for the latter and it depends on the excitation conditions. Finally, a Bragg reflector and a microcavity structure comprising of alternating (BaTiO3:Er,Yb) and SiO2 xerogel layers were fabricated with the cavity mode near the red PL band of Er3+ ions. Enhancement of UC PL from the microcavity was observed for the sample annealed from 450°C to 600°C. The fabricated cavity structures annealed at 450°C allow us to tune the cavity mode with 10 nm shift within the temperature range from +20°C to +130°C. Photonic application of BaTiO3 xerogel structures doped with lanthanides is discussed

PHOTOLUMINESCENCE OF ALUMINUM OXYNITRIDE Al5O6N DOPED WITH RARE-EARTH IONS

Photoluminescence (PL) spectra and pulsed PL decay curves of aluminum oxynitride Al5O6N (ALON) doped with Ce3+ and Eu2+ ions were measured. In PL spectra broad bands with maximum at 380 nm (ALON:Ce) and 500 nm (ALON: Eu) related to d-f transitions in rare-earth ions are observed. Pulsed PL decay curves approximated with exponential expression with one component (ALON:Ce) and two components (ALON: Eu), de-cay times is 24 ns and 313 ns, 1025 ns respectively.Работа выполнена при поддержке Российского Фонда Фундаментальных Исследований (проект РФФИ № 17-03-00630_а)

Measurements of π±\pi^\pm, K±K^\pm, pp and pˉ\bar{p} spectra in 40^{40}Ar+45^{45}Sc collisions at 13AA to 150AA GeV/cc

The NA61/SHINE experiment at the CERN Super Proton Synchrotron studies the onset of deconfinement in strongly interacting matter through a beam energy scan of particle production in collisions of nuclei of varied sizes. This paper presents results on inclusive double-differential spectra, transverse momentum and rapidity distributions and mean multiplicities of $\pi^\pm$, $K^\pm$, $p$ and $\bar{p}$ produced in $^{40}$Ar+$^{45}$Sc collisions at beam momenta of 13$A$, 19$A$, 30$A$, 40$A$, 75$A$ and 150$A$ GeV/$c$. The analysis uses the 10% most central collisions, where the observed forward energy defines centrality. The energy dependence of the $K^\pm$/$\pi^\pm$ ratios as well as of inverse slope parameters of the $K^\pm$ transverse mass distributions are placed in between those found in inelastic $p$+$p$ and central Pb+Pb collisions. The results obtained here establish a system-size dependence of hadron production properties that so far cannot be explained either within statistical (SMES, HRG) or dynamical (EPOS, UrQMD, PHSD, SMASH) models