Tuning of tunneling current noise spectra singularities by localized states charging

We report the results of theoretical investigations of tunneling current noise spectra in a wide range of applied bias voltage. Localized states of individual impurity atoms play an important role in tunneling current noise formation. It was found that switching "on" and "off" of Coulomb interaction of conduction electrons with two charged localized states results in power law singularity of low-frequency tunneling current noise spectrum ($1/f^{\alpha}$) and also results on high frequency component of tunneling current spectra (singular peaks appear).Comment: 7 pages, 4 figure

On the phenomenology of a Z' coupling only to third-family fermions

The phenomenology of an additional U(1) neutral gauge boson Z' coupled to the third family of fermions is discussed. One might expect such a particle to contribute to processes where taus, b and t quarks are produced. Precision data from LEP1 put severe constraints on the mixing and heavy-boson mass. We find that the effects of such a particle could not be observed at hadronic colliders, be it at the Tevatron or the LHC, because of the QCD background. At LEP2 and future e^+e^- linear colliders, one could instead hope to observe such effects, in particular for b\bar b final states.Comment: 36 pages, LaTeX, including 12 figure

B-lymphocyte aggregation in the lung tissue is a pathogenic factor in experimental infection caused by Mycobacterium avium

When infecting the lungs with Mycobacterium avium of B6 line mice genetically susceptible to this infection the compact aggregates (follicles) of B-lymphocytes are formed with the peak at the 11-13th week after the infection. Physiological role of these cellular accumulations remained unclear. Having applied segregative genetic analysis to allele conglutination of Slc11a1 gene with two signs – quantity of mycobacteria and accumulation of B-cellular follicles to the F2 mice from crossing (В6 × I/St), one managed to find out that the quantity and size of follicles directly correlate with M. avium replication in the lungs. Thus this type of the lung tissue infiltration does not protect the host from infection and it is a pathogenic factor

Alteration of Effector Activity of T-Lymphocytes in Mice Immunized against Tularemia, Using <I>in vitro</I> Stimulation by Tularin

lymphocytes) isolated from mice, immunized against tularemia. Put forward is the proposition to use tularin in serological surveys and reactions in vitro for identification of postinfectious or postvaccinal immunity to tularemia