282 research outputs found
Phase chemistry in the Ca-Mn-Sb-O system at 1160-1250 °C
Phase equilibrium in the Ca-Mn-Sb-O system was studied in air at the temperature range from 1160 to 1250°C and a pseudo-quaternary phase diagram for the system CaO-MnO-Mn2O3-Sb2O5 is presented. The following compounds were discovered: new antimonate Ca 7Sb2O12 with a perovskite-like structure, solid solutions Mn2-xCaxSb2O7 (0 ≤ x ≤ 1.6) with a 3T-weberite structure, and Ca2-xMn xSb2O7 (0 ≤ x ≤ 0.23) with a 2O-weberite structure, as well as solid solutions Ca2Mn1+xSb 1-xO6 with monoclinic (0 ≤ x ≤ 0.67) and orthorhombic (0.75 ≤ x ≤ 1) perovskite structures. The existence of a number of double and ternary oxides and solid solutions on the basis of Sb 5+ and Mn2+, Mn3+, Mn4+ and with mixed manganese valence is confirmed. Copyright © 2013 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Soluble triggering receptor expressed on myeloid cells as a marker of non-infectious systemic inflammatory response syndrome
Fabrication and properties of L-arginine-doped PCL electrospun composite scaffolds
The article describes fabrication and properties of composite fibrous
scaffolds obtained by electrospinning of the solution of
poly({\epsilon}-caprolactone) and arginine in common solvent. The influence of
arginine content on structure, mechanical, surface and biological properties of
the scaffolds was investigated. It was found that with an increase of arginine
concentration diameter of the scaffold fibers was reduced, which was
accompanied by an increase of scaffold strength and Young modulus. It was
demonstrated that porosity and water contact angle of the scaffold are
independent from arginine content. The best cell adhesion and viability was
shown on scaffolds with arginine concentration from 0.5 to 1 % wt
Scintillating properties of frozen new liquid scintillators
The light emission from scintillators which are liquid at room temperature was studied in the interval between ~C and ~C, where the phase transition from liquid to solid takes place. The light yield measured at ~C is about twice as much as that observed at ~C. By cooling the scintillator from ~C to ~C and then heating it from ~C to ~C, the light yield varies in steps at well defined temperatures, which are different for the cooling and heating processes. These hysteresis phenomena appear to be related to the solvent rather than to the dopant. The decay time of scintillation light was measured at ~C and ~C. Whilst at room temperature most of the light is emitted with a decay time of 6--8 ns, at ~C a slower component, with a decay time of 25--35 ns, becomes important
Photoproduction evidence for and against hidden-strangeness states near 2 GeV
Experimental evidence from coherent diffractive proton scattering has been
reported for two narrow baryonic resonances which decay predominantly to
strange particles. These states, with masses close to 2.0 GeV would, if
confirmed, be candidates for hidden strangeness states with unusual internal
structure. In this paper we examine the literature on strangeness
photoproduction, to seek additional evidence for or against these states. We
find that one state is not confirmed, while for the other state there is some
mild supporting evidence favoring its existence. New experiments are called
for, and the expected photoproduction lineshapes are calculated.Comment: 9 pages, RevTex, five postscript figures, submitted to PR
Aspects of phi-meson production in proton-proton collisions
We analyze near-threshold cross section data for the reaction pp->pp phi
published by the DISTO collaboration and recent, still preliminary results
presented by the ANKE Collaboration. We formulate a procedure to evaluate the
OZI ratio at low energies by taking into account corrections from the
kinematics and the final-state interaction. Combining the new data with the few
measurements available at higher energies we give a limit for the OZI rule
violation and estimate the possible contribution from a five-quark baryonic
resonance coupled to the phi-p system.Comment: 6 pages, 4 figure
Hot dense capsule implosion cores produced by z-pinch dynamic hohlraum radiation
Hot dense capsule implosions driven by z-pinch x-rays have been measured for
the first time. A ~220 eV dynamic hohlraum imploded 1.7-2.1 mm diameter
gas-filled CH capsules which absorbed up to ~20 kJ of x-rays. Argon tracer atom
spectra were used to measure the Te~ 1keV electron temperature and the ne ~ 1-4
x10^23 cm-3 electron density. Spectra from multiple directions provide core
symmetry estimates. Computer simulations agree well with the peak compression
values of Te, ne, and symmetry, indicating reasonable understanding of the
hohlraum and implosion physics.Comment: submitted to Phys. Rev. Let
A case study of using x-ray Thomson scattering to diagnose the in-flight plasma conditions of DT cryogenic implosions
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