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The main cell junctions in the intestinal tract of a small group of apterygotan insects, Protura, were examined in conventional thin sections, tracer-infiltrated sections and freeze-fracture replicas. The smooth septate junctions in the midgut of collembolan Tomocerus minor were also studied for comparison. Pleated septate junctions are found in foregut,(More)
Possibility of raising plasma temperature of gun-produced plasma torus by adiabatic self-compression is studied. Under certain operating conditions. the plasma temperature can be reached to more than four times of its initial value within time scale of one microsecond. It is proved that the equipartition between poloidal and toroidal magnetic energy is a(More)
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