111 research outputs found
Neutrino electromagnetic properties and new bounds on neutrino magnetic moments
We give a brief outline of possible neutrino electromagnetic characteristics,
which can indicate new physics beyond the Standard Model. Special emphasis is
put on recent theoretical development in searches for neutrino magnetic
moments.Comment: 4 pages, to appear in J. Phys.: Conf. Ser. (2012), based on the talk
presented at the XII International Conference on Topics in Astroparticle and
Underground Physics (TAUP 2011), Munich 5-9 September 201
On neutrino-atom scattering in searches for neutrino magnetic moments
In the experimental searches for neutrino magnetic moments using germanium
detectors one studies the ionization channel in the neutrino-atom scattering.
We find that the so-called stepping approximation to the neutrino-impact
ionization is exact in the semiclassical limit, and that the deviations from
this approximation are very small.Comment: 1 page, to appear in Nuclear Physics B Proceedings Supplement 2011
(Proceedings of the XXIV International Conference on Neutrino Physics and
Astrophysics, Athens, June 14-19, 2010
Reactor as a Source of Antineutrinos: Thermal Fission Energy
Deeper insight into the features of a reactor as a source of antineutrinos is
required for making further advances in studying the fundamental properties of
the neutrino. The relationship between the thermal power of a reactor and the
rate of the chain fission reaction in its core is analyzed.Comment: 15 pages in LaTex and 4 ps figure
Electromagnetic neutrino-atom collisions: The role of electron binding
We present a new theoretical approach to neutrino-impact atomic excitation
and/or ionization due to neutrino magnetic moments. The differential cross
section of the process is given by a sum of the longitudinal and transverse
terms, which are induced by the corresponding components of the force that the
neutrino magnetic moment imposes on electrons with respect to momentum
transfer. In this context, the recent theoretical studies devoted to the
magnetic neutrino scattering on atoms are critically examined.Comment: 4 pages, published in proceedings of NOW201
The first result of the neutrino magnetic moment measurement in the GEMMA experiment
The first result of the neutrino magnetic moment measurement at the
Kalininskaya Nuclear Power Plant (KNPP) with the GEMMA spectrometer is
presented. An antineutrino-electron scattering is investigated. A high-purity
germanium detector of 1.5 kg placed 13.9 m away from the 3 GW reactor core is
used in the spectrometer. The antineutrino flux is . The differential method is used to extract the -e
electromagnetic scattering events. The scattered electron spectra taken in 6200
and 2064 hours for the reactor ON and OFF periods are compared. The upper limit
for the neutrino magnetic moment Bohr magnetons
at 90{%} CL is derived from the data processing.Comment: 9 pages, 10 figures, 2 table
Significantly reduced CCR5-tropic HIV-1 replication in vitro in cells from subjects previously immunized with Vaccinia Virus
<p>Abstract</p> <p>Background</p> <p>At present, the relatively sudden appearance and explosive spread of HIV throughout Africa and around the world beginning in the 1950s has never been adequately explained. Theorizing that this phenomenon may be somehow related to the eradication of smallpox followed by the cessation of vaccinia immunization, we undertook a comparison of HIV-1 susceptibility in the peripheral blood mononuclear cells from subjects immunized with the vaccinia virus to those from vaccinia naive donors.</p> <p>Results</p> <p>Vaccinia immunization in the preceding 3-6 months resulted in an up to 5-fold reduction in CCR5-tropic but not in CXCR4-tropic HIV-1 replication in the cells from vaccinated subjects. The addition of autologous serum to the cell cultures resulted in enhanced R5 HIV-1 replication in the cells from unvaccinated, but not vaccinated subjects. There were no significant differences in the concentrations of MIP-1α, MIP-1β and RANTES between the cell cultures derived from vaccinated and unvaccinated subjects when measured in culture medium on days 2 and 5 following R5 HIV-1 challenge.</p> <p>Discussion</p> <p>Since primary HIV-1 infections are caused almost exclusively by the CCR5-tropic HIV-1 strains, our results suggest that prior immunization with vaccinia virus might provide an individual with some degree of protection to subsequent HIV infection and/or progression. The duration of such protection remains to be determined. A differential elaboration of MIP-1α, MIP-1β and RANTES between vaccinated and unvaccinated subjects, following infection, does not appear to be a mechanism in the noted protection.</p
Mata Matas in Captivity
This is where the abstract of this record would appear. This is only demonstration data
Observations on the Red Ratsnake / Cornsnake
This is where the abstract of this record would appear. This is only demonstration data
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