44 research outputs found
Formation of bound states of electrons in spherically symmetric oscillations of plasma
We study spherically symmetric oscillations of electrons in plasma in the
frame of classical electrodynamics. Firstly, we analyze the electromagnetic
potentials for the system of radially oscillating charged particles. Secondly,
we consider both free and forced spherically symmetric oscillations of
electrons. Finally, we discuss the interaction between radially oscillating
electrons through the exchange of ion acoustic waves. It is obtained that the
effective potential of this interaction can be attractive and can transcend the
Debye-Huckel potential. We suggest that oscillating electrons can form bound
states at the initial stages of the spherical plasma structure evolution. The
possible applications of the obtained results for the theory of natural
plasmoids are examined.Comment: 9 pages in LaTeX2e, no figures; paper was significantly modified, 2
new references added, some inessential mathematics was removed, many typos
were corrected; final variant to be published in Physica Script
Ball Lightning–Aerosol Electrochemical Power Source or A Cloud of Batteries
Despite numerous attempts, an adequate theoretical and experimental simulation of ball lightning still remains incomplete. According to the model proposed here, the processes of electrochemical oxidation within separate aerosol particles are the basis for this phenomenon, and ball lightning is a cloud of composite nano or submicron particles, where each particle is a spontaneously formed nanobattery which is short-circuited by the surface discharge because it is of such a small size. As free discharge-shorted current loops, aerosol nanobatteries are exposed to a powerful mutual magnetic dipole–dipole attraction. The gaseous products and thermal energy produced by each nanobattery as a result of the intra-particle self-sustaining electrochemical reactions, cause a mutual repulsion of these particles over short distances and prevent their aggregation, while a collectivization of the current loops of separate particles, due to the electric arc overlapping between adjacent particles, weakens their mutual magnetic attraction over short distances. Discharge currents in the range of several amperes to several thousand amperes as well as the pre-explosive mega ampere currents, generated in the reduction–oxidation reactions and distributed between all the aerosol particles, explain both the magnetic attraction between the elements of the ball lightning substance and the impressive electromagnetic effects of ball lightning
CYTOKINES AS MARKERS OF THE INFILTRATIVE PULMONARY TUBERCULOSIS DEVELOPMENT
Abstract. Many parts of immune system are involved in interaction of M. tuberculosis and human organism. There are some publications concerning significance of interferon and other cytokines in lung tuberculosis. Our research group investigated condition of interferon and cytokines systems in patients with firstly detected infiltrative lung tuberculosis. The results of this study have shown direct links between clinical and immunological efficacy of the complex treatment of such patients. The active expression of IL-6 gene correlates with slow dynamics of lung infiltrate resolution and long saving of patient’s complaint for respiratory tract symptoms during the treatment. The expression of IL-12 gene linked to small volume of infiltrates in lung tissue before treatment whereas expression of IL-1β gene correlates with decrease of intoxication time and respiratory symptoms in patients during therapy. The knowledge about violation in cytokine regulation parts is absolutely necessary to determine dynamics of diseases development and treatment efficacy as well as to use immunotherapy
THE STATUS OF A CONTINGENT OF PATIENTS WITH TUBERCULOSIS CONCURENT WITH HIV INFECTION IN THE RUSSIAN FEDERATION, INTERSECTORAL AND INTERDEPARTMENTAL INTERACTION IN ORGANIZING ANTITUBERCULOSIS CARE TO HIV-INFECTED PATIENTS
Multivariate analysis was made to analyze a contingent of patients with tuberculosis concurrent with HIV infection in the Russian Federation over 7 years, by applying recording form No. 263-y/TB “Tuberculosis/HIV Patient Card”. The tuberculosis/HIV patients were shown to be the most difficult contingent among both the patients with tuberculosis and those with HIV infection.Based on the characteristics of the contingent of co-infected patients, the authors propose additional recommendations to activate and improve approaches to preventing tuberculosis in HIV-infected patients. Among other activities, work is done in penitentiary and narcological facilities where there are commonly HIV-infected patients who are at high risk for tuberculosis and those who are unregistered in the AID center