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V Sokolov

Publications and source records attributed to V Sokolov.

17 recordsLinked to original sources
PubMed2004

New paradigm for the isotope scaling of plasma transport paradox.

Most tokamak experimental results [Nucl. Fusion 33, 1205 (1993)]] and basic physics experiments [Phys. Rev. Lett. 89, 095001 (2002)]] in the Columbia Linear Machine indicate dependence of the ion thermal conductivity on the isotopic mass close to chi( perpendicular ) approximately A(-0.5)(i), i.e., inverse gyro-Bohm. This is in stark contradiction to most present theoretical models predicting Bohm (A(0)(i)) or gyro-Bohm (A(0.5)(i)) scaling. A series of experiments designed to explore the physics basis of this scaling appears to lead to a new model for this scaling based on 3-wave coupling of two ion temperature gradient radial harmonics and an ion acoustic wave.

Journal Article↗
PubMed2002

Experimental study of isotope scaling of ion thermal transport.

The wide divergence between most theoretical predictions of isotopic mass scaling of transport and tokamak experimental results motivated a basic physics experiment in the Columbia Linear Machine [R. Scarmozzino, A. K. Sen, and G. A. Navratil, Phys. Rev. Lett. 57, 1729 (1986)]]. The experiments on ion thermal conductivity due to ion temperature gradient-driven slab modes are performed using two different gases: hydrogen and deuterium. The results indicate inverse dependence of ion thermal conductivity on the isotope mass close to K(radially) approximately A(-0.5)(i). This is similar to the tokamak results, but in stark contradiction to most present theoretical models.

Journal Article↗
PubMed1999

Perfect DiViSy technology for video network in medicine (Moscow Information Network for Teleoncology).

A large telemedicine project is now under development in Moscow. The general task of the project is to link oncology research centres and hospitals meeting the project profile, and to provide on-line (using real-time video conferences) and off-line (via distributed database of medical information) information exchange. There was no existing technology available for use at the project's base which was ready to meet all requirements, so we are using specially created technology for video networks (DiViSy V.97). We suppose this technology to be more applicable for use in telemedicine networks than are business video conference technologies and classical Internet/Intranet technologies. We affirm in our conclusion that now is the time for developing special telemedicine standards, recommendations of compatibility, etc., and that we are ready to take part in this process.

Computer Communication Networks↗
PubMed1996

Assignment of a gene(s) conferring apomixis in Tripsacum to a chromosome arm: cytological and molecular evidence.

Attempts are underway to locate and transfer genes conferring diplosporous apomixis from Tripsacum to maize. The objective of this study was to evaluate several apomictic and sexual maize-Tripsacum hybrids for the presence or absence of Tripsacum chromosomes, PCR-RAPD generated markers, and RFLP markers that would have an association with apomictic development. Cytological and molecular analysis resulted in the identification of the Tripsacum chromosome arm carrying the gene(s) conferring diplosporous apomixis. Evaluations made on apomictic sexually derived maize + Tripsacum addition lines and an apomictic line possessing a Mz6L-Tr16L translocation were used to establish the location of the gene(s). Results of the study indicate that the successful transfer of a single Tripsacum chromosome is all that is necessary to maintain apomictic reproduction in a maize background. Additional use of this material may facilitate the development of an apomictic maize prototype and the eventual isolation of the gene(s).

Chromosomes↗
PubMedDate not supplied

Effect of methionine on the brain biogenic monoamines and on the cortical bioelectrical activity of rabbits.

Methionine (150 and 300 mg/kg ip for 3 days) did not change the concentrations of striatal DA. It was also without effect on the levels of NA and 5-HT in the diencephalon and in the brain stem, while the 5-HIAA content was significantly increased in both structures after the dose 300 mg/kg. The single injection of methionine in doses of 10--300 mg/kg iv provoked dose-dependent changes in cortical bioelectrical activity. It was observed a considerable increase in the number of spindles, an increase in the amplitude and number of waves composing the spindles as well as a rise in their frequency characteristic.

Animals↗