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N V Kulikova

Publications and source records attributed to N V Kulikova.

8 recordsLinked to original sources
PubMed1992

Cometary/meteor coupling: structure of young streams.

Information on atmospheric parameters, properties and processes above 70 km are mainly based upon meteor data. An important problem of such data systematization is to single out the meteor streams associated with a series of extreme phenomena. The forecasting of these phenomena requires a physical model of meteor streams at the early stage of their occurrence. A direct coupling with comets is assumed for most of the streams. This paper analyses the structure simulation of cometary nucleus desintegration. The D-criterion is used as the orbital community criterion. Giacobini-Zinner comet in its ten appearances (1900-1979) is considered. Determination of stream location and its detailed structural characteristics is essential for long space missions.

Astronomical Phenomena↗
PubMed1992

Modelling of the new formation structures in the near space.

Complex numerical model of young meteor stream formation taking into account reactive deceleration of cometary nucleus and its form change in the process of stream formation is discussed. The model made it possible to predict the existence of fine and superfine structures for young meteor streams, the characteristics of which agree with the observational data on the Draconid and Leonid meteor showers.

Astronomical Phenomena↗
PubMed1991

[The surface-active properties of dimethylethanolamine and its effect on the ecto-ATPase activity of plasma membranes].

It has been stated that DMAE has low surface activity and can form extended monolayers, in which orientation of molecules depends on the concentration of amino alcohol. The concentration of DMAE rated as 10(-6)-10(-5) M does not show significant changes in ecto-ATPase. Effect of such concentration is completely reversible. Cytotoxic effect manifesting itself by a sharp decrease and blocking ecto-ATPase activity is not completely reversible and appears at DMAE concentrations higher than 10(-4) M.

Adenosine Triphosphatases↗
PubMedDate not supplied

[Reconstruction of the properties of smooth-muscle cell sarcolemma on planar lipid membranes].

A method is described for reconstruction of certain sarcolemma characteristics of smooth muscle cells in the small intestine of a rabbit on the planar lipid membranes (PLM). The method is based on the use of fusogenic properties of certain lipid preparations. The ultrasound dispergates of azolectin and egg lecithin in combined incubation with sarcolemma vesicles of smooth-muscle cells promote a 1.4-1.8-fold increase of the total ATPase activity of the sarcolemma. Cholesterol, dipalmithoil lecithin, total brain phospholipids, inhibit the ATPase activity. Sarcolemma vesicles preincubated with azolectin lyposomes in the ratio which induces maximum ATPase activation (sarcolemma protein: azolectin-1:6) interact intensively with PLM from azolectin. PLM modified in such a way is channel-conductive, sensitive to tetraethylammonium and sign of the applied voltage.

Adenosine Triphosphatases↗
PubMedDate not supplied

[Muscular myosin structural and functional changes during interaction with ATP and bivalent ions].

The interaction of myosin with ATP and bivalent ions is shown to cause changes in myosin ultraviolet fluorescence. Such a change is more significant for myosin of skeletal muscles than for that of smooth muscles. Kinetics of the fluorescence change has a phase of a sharp rise immediately after ATP addition and a phase of a slow decrease of fluorescence. The changes in fluorescence are connected with formation of an intermediate complex of myosin with ATP (intermediate). It is established that calcium ions are specific in the myosin ATPase reaction and they accelerate considerably the decay of this complex, while magnesium ions inhibits this process.

Adenosine Triphosphate↗