67 research outputs found
Coupling of the lattice and superlattice deformations and hysteresis in thermal expansion for the quasi one-dimensional conductor TaS
An original interferometer-based setup for measurements of length of
needle-like samples is developed, and thermal expansion of o-TaS crystals
is studied. Below the Peierls transition the temperature hysteresis of length
is observed, the width of the hysteresis loop being up to . The behavior of the loop is anomalous: the length changes so
that it is in front of its equilibrium value. The hysteresis loop couples with
that of conductivity. The sign and the value of the length hysteresis are
consistent with the strain dependence of the charge-density waves (CDW) wave
vector. With lowering temperature down to 100 K the CDW elastic modulus grows
achieving a value comparable with the lattice Young modulus. Our results could
be helpful in consideration of different systems with intrinsic
superstructures.Comment: 4 pages, 3 figures. Phys. Rev. Lett., accepted for publicatio
Observation of narrow baryon resonance decaying into in pA-interactions at with SVD-2 setup
SVD-2 experiment data have been analyzed to search for an exotic baryon
state, the -baryon, in a decay mode at on IHEP
accelerator. The reaction with a limited multiplicity was
used in the analysis. The invariant mass spectrum shows a resonant
structure with and . The statistical significance of this peak was estimated to be of . The mass and width of the resonance is compatible with the recently
reported - baryon with positive strangeness which was predicted as an
exotic pentaquark () baryon state. The total cross section for
production in pN-interactions for was estimated to be
and no essential deviation from A-dependence for inelastic
events was found.Comment: 8 pages, 7 figures, To be submitted to Yadernaya Fizika. v3-v5 - Some
references added, minor typos correcte
Терапевтический лекарственный мониторинг метотрексата при применении его в высоких дозах для лечения остеосаркомы у детей
In children oncology high doses of methotrexate (HD Mtx) use for treatment of osteosarcoma, acute lymphoblastic leukemia and many others tumors. Due to high intra- and interindividual Mtx pharmacokinetic variability it is essential perform monitoring its concentration in the saliva. The most dangerous phenomena in the case of HD Mtx are so-termed "delayed Mtx excretion", "prolonged Mtx excretion". Their development is multifactorial and unpredictable. Having big actual material we set task: analyze pharmacokinetics HD Mtx in case of osteosarcoma in children, determine its peculiarities, elucidate whether similar or not proceed disorders of Mtx excretion, perform their quantification.В детской онкологии высокие дозы метотрексата (ВД Mtx) используются для лечения остеосаркомы (ОС), острого лимфобластного лейкоза и ряда других опухолей. В связи с высокой интра- и экстраиндивидуальной изменчивостью фармакокинетики Mtx необходимо проводить мониторинг его концентрации в сыворотке крови. Самым опасным явлением при терапии ВД Mtx является т.н. «отсроченная экскреция Mtx», «замедленное выведение Mtx». Их развитие многофакторное и непредсказуемое. В данной работе, имея большой фактический материал, была поставлена задача проанализировать фармакокинетику ВД Mtx при остеосаркоме у детей, выявить ее особенности, установить, однотипно ли протекают нарушения выведения Mtх, провести их количественный анализ
Challenges in QCD matter physics - The Compressed Baryonic Matter experiment at FAIR
Substantial experimental and theoretical efforts worldwide are devoted to
explore the phase diagram of strongly interacting matter. At LHC and top RHIC
energies, QCD matter is studied at very high temperatures and nearly vanishing
net-baryon densities. There is evidence that a Quark-Gluon-Plasma (QGP) was
created at experiments at RHIC and LHC. The transition from the QGP back to the
hadron gas is found to be a smooth cross over. For larger net-baryon densities
and lower temperatures, it is expected that the QCD phase diagram exhibits a
rich structure, such as a first-order phase transition between hadronic and
partonic matter which terminates in a critical point, or exotic phases like
quarkyonic matter. The discovery of these landmarks would be a breakthrough in
our understanding of the strong interaction and is therefore in the focus of
various high-energy heavy-ion research programs. The Compressed Baryonic Matter
(CBM) experiment at FAIR will play a unique role in the exploration of the QCD
phase diagram in the region of high net-baryon densities, because it is
designed to run at unprecedented interaction rates. High-rate operation is the
key prerequisite for high-precision measurements of multi-differential
observables and of rare diagnostic probes which are sensitive to the dense
phase of the nuclear fireball. The goal of the CBM experiment at SIS100
(sqrt(s_NN) = 2.7 - 4.9 GeV) is to discover fundamental properties of QCD
matter: the phase structure at large baryon-chemical potentials (mu_B > 500
MeV), effects of chiral symmetry, and the equation-of-state at high density as
it is expected to occur in the core of neutron stars. In this article, we
review the motivation for and the physics programme of CBM, including
activities before the start of data taking in 2022, in the context of the
worldwide efforts to explore high-density QCD matter.Comment: 15 pages, 11 figures. Published in European Physical Journal
A922 Sequential measurement of 1 hour creatinine clearance (1-CRCL) in critically ill patients at risk of acute kidney injury (AKI)
Meeting abstrac
Estimate of the selectivity of the stationary phase in gas chromatography from the values of the retention indices
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