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This paper examines spinor structures and two-component spinor fields in in a class of spacetimes that are spacedrientable but not time-orientable. The space-oriented frames form a principal bundle acted on by the group of p r o p nononhochronous Lomtz transformations. This p u p has two double coverings, Sint and Sin-, but only Sinacts on the usual two-component spinors associated wilh Weyl neutrinos in Minkowski space Consideration is initially reshicled to Lorentzian universes-from-nothing. geometries, like antipodally identified deSiner space, that have a single spacelike boundary and a smooth meuic wilh Lorentzian signalure. Every such spacetime has a Sin+ S t " r e , but only a subclass has a Sinstructure. Inequivalent Sin+-and Sin--spinor structures correspond to members of two classes of homomorphisms from XI(=) to &, where ; i i is the orientable double covering of the spacetime m i f o l d M. For general time-nonorientable spacetimes. a similar classification is obtained of Sin' sWcNres in terms of homomorphisms from q ( E ) to & where E is the bundle of space-oriented frames of M .

The method of linear voltammetry in the potentiodynamic mode was used to study the change in the anode behavior of a heavy tungsten VNZh alloy (in wt.%: 78.8 W; 15.2 Ni; 6.0 Fe), as well as the phase composition and morphology of its surface during its electrochemical dissolution under the influence of DC current. It was determined, that the phase composition of VNZh alloy surface is a solid solution of iron-nickel after tungsten dissolution from the surface of the alloy. It has been established, that in ammonia-alkali electrolytes the process of tungsten passing into solution does not stop after dissolution of the metal from the alloy surface, but continues both due to diffusion of the metal from the depth of the sample and the pits formation in the processed alloy.