1,993 research outputs found
Effects of dimephosphone on skin survival in conditions of reduced blood circulation
The search for and creation of drugs with dermatoprotective and metabotropic activity is one of the priorities of modern diabetology. Synthetic organophosphorus compounds with no anticholinesterase activity, to which dimephosphone belongs to, deserve great attention in this respec
Measurement of trapped proton fluences in main stack of P0006 experiment
We have measured directional distribution and Eastward directed mission fluence of trapped protons at two different energies with plastic nuclear track detectors (CR-39 with DOP) in the main stack of the P0006 experiment on LDEF. Results show arriving directions of trapped protons have very high anisotropy with most protons arriving from the West direction. Selecting these particles we have determined the mission fluence of Eastward directed trapped protons. We found experimental fluences are slightly higher than results of the model calculations of Armstrong and Colborn
Multiplicities of secondaries in interactions of 1.8 GeV/nucleon Fe-56 nuclei with photoemulsion and the cascade evaporation model
A nuclear photographic emulsion method was used to study the charge-state, ionization, and angular characteristics of secondaries produced in inelastic interactions of Fe-56 nuclei at 1.8 GeV/nucleon with H, CNO, and AgBr nuclei. The data obtained are compared with the results of calculations made in terms of the Dubna version of the cascade evaporation model (DCM). The DCM has been shown to satisfactorily describe most of the interaction characteristics for two nuclei in the studied reactions. At the same time, quantitative differences are observed in some cases
Target fragments in collisions of 1.8 GeV/nucleon Fe-56 nuclei with photoemulsion nuclei, and the cascade-evaporation model
Nuclear photographic emulsion is used to study the dependence of the characteristics of target-nucleus fragments on the masses and impact parameters of interacting nuclei. The data obtained are compared in all details with the calculation results made in terms of the Dubna version of the cascade-evaporation model (DCM)
Prompt J/psi production in the Regge limit of QCD: From Tevatron to LHC
We study prompt J/psi-meson hadroproduction invoking the hypothesis of gluon
Reggeization in t-channel exchanges at high energy and the factorization
formalism of nonrelativistic quantum chromodynamics at the leading order in the
strong-coupling constant alpha_s and the relative velocity of quarks v. The
transverse-momentum distribution of direct and prompt J/psi-meson production
measured at the Fermilab Tevatron fitted to obtain the nonperturbative
long-distance matrix elements, which are used to predict prompt J/psi
production spectra at the CERN LHC. At the numerical calculation, we adopt the
Kimber-Martin-Ryskin and Blumlein prescriptions to derive unintegrated gluon
distribution function of the proton from their collinear counterpart, for which
we use the Martin-Roberts-Stirling-Thorne set. Without adjusting any free
parameters, we find good agreement with measurements by the ATLAS, CMS and LHCb
Collaborations at the LHC at the hadronic c.m. energy sqrt S=7 TeV.Comment: 13 pages, 10 figures, 1 tabl
Revisiting the 'LSND anomaly' II: critique of the data analysis
This paper, together with a preceding paper, questions the so-called 'LSND
anomaly': a 3.8 sigma excess of antielectronneutrino interactions over standard
backgrounds, observed by the LSND Collaboration in a beam dump experiment with
800 MeV protons. That excess has been interpreted as evidence for the
antimuonneutrino to antielectronneutrino oscillation in the \Deltam2 range from
0.2 eV2 to 2 eV2. Such a \Deltam2 range is incompatible with the widely
accepted model of oscillations between three light neutrino species and would
require the existence of at least one light 'sterile' neutrino. In a preceding
paper, it was concluded that the estimates of standard backgrounds must be
significantly increased. In this paper, the LSND Collaboration's estimate of
the number of antielectronneutrino interactions followed by neutron capture,
and of its error, is questioned. The overall conclusion is that the
significance of the 'LSND anomaly' is not larger than 2.3 sigma.Comment: 30 pages, 16 figures, 6 table
Reply to 'Corrections to the HARP-CDP Analysis of the LSND Neutrino Oscillation Backgrounds'
The alleged mistakes in recent papers that reanalyze the backgrounds to the
'LSND anomaly' do not exist. We maintain our conclusion that the significance
of the 'LSND anomaly' is not 3.8 sigma but not larger than 2.3 sigma.Comment: 3 page
A review of the pesticide MCPA in the land-water environment and emerging research needs
peer-reviewedDue to its high solubility and poor adsorption to the soil matrix, the postemergence
herbicide 2-methyl-4-chlorophenoxyacetic acid (MCPA) is susceptible
to transport into surface and groundwater bodies, where it can result in
compromised water quality and breaches of legislative standards. However,
there is still poor understanding of catchment scale dynamics and transport,
particularly across heterogeneous hydrogeological settings. While it is known
that MCPA degrades under aerobic conditions, negligible breakdown can
occur in anaerobic environments, potentially creating a legacy in saturated
soils. Fast runoff pathways post application are likely transport routes, but the
relative contribution from the mobilization of legacy MCPA from anaerobic
zones has yet to be quantified, making the delineation of MCPA sources
encountered during monitoring programs challenging. While ecotoxicological
effects have been examined, little is known about the interaction of MCPA
(and its degradation products) with other pesticides, with nutrients or with colloids,
and how this combines with environmental conditions to contribute to
multiple stressor effects. We examine the state of MCPA knowledge, using case
study examples from Ireland, and consider the implications of its widespread
detection in waterbodies and drinking water supplies. Research themes
required to ensure the sustainable and safe use of MCPA in an evolving agricultural,
social and political landscape are identified here. These include the
need to identify mitigation measures and/or alternative treatments, to gain
insights into the conditions governing mobilization and attenuation, to map
pathways of migration and to identify direct, synergistic and antagonistic ecotoxicological
effects
Why the paper CERN-PH-EP-2009-015 (arXiv:0903.4762) is scientifically unacceptable
The paper CERN-PH-EP-2009-015 (arXiv:0903.4762) by A. Bagulya et al. violates
standards of quality of work and scientific ethics on several counts. The paper
contains assertions that contradict established detector physics. The paper
falls short of proving the correctness of the authors' concepts and results.
The paper ignores or quotes misleadingly pertinent published work. The paper
ignores the fact that the authors' concepts and results have already been shown
wrong in the published literature. The authors seem unaware that cross-section
results from the 'HARP Collaboration' that are based on the paper's concepts
and algorithms are in gross disagreement with the results of a second analysis
of the same data, and with the results of other experiments.Comment: 8 pages, 3 figure
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