Hollow corundum spheres for high temperature thermal insulation

Conclusions We developed a technological route for the production of hollow electrocorundum spheres intended for manufacturing highly refractory thermal insulation products, concrete bodies, and loose charges. The technology was tested under industrial conditions.Translated from Ogneupory, No. 7, pp. 27–30, July, 1987.     

Total and differential fission cross sections of uranium and thorium for low energy deuterons

A method of recording fission fragments with glasses is used for determining the total and differentiae fission cross sections of Th²³², U²³³, U²³⁵, and U²³⁸ for deuterons with energy considerably below the Coulomb barrier –6.6 MeV and less. The results are compared with data from published papers in which the same quantities were studied by means of semiconductor detectors in the region of high-energy deuterons. New facts are noted, which indicate that for nuclei with different neutron fission thresholds, as a result of irradition with sub-barrier deuterons, the reactions preceding fission may differ considerably.Translated from Atomnaya Énergiya, Vol. 18, No. 5, pp. 456–459, May, 1965     

Relaxation during drying of hydrated cellulose fibres

Conclusions 1. The authors have studied the kinetics of the change in length and internal stresses during drying of freshly-formed hydrated cellulose fibre.2. It is shown that drying of hydrated cellulose fibre is characterised by alternation of two opposing processes: in the first drying stage, when mainly free moisture is removed and the moisture content falls to 25–30%, the thread becomes longer; with a further decrease in the moisture content, due to removal of adsorbed water, the thread becomes shorter.This characteristic of the behaviour of freshly-formed hydrated cellulose fibre must be taken into account when working out the plant procedure and lay-out for continuous-forming and fibre-dressing machines.All-Union Scientific-Research Institute for Synthetic Fibres (VNIIV). Translated from Khimicheskie Volokna, No. 5, pp. 32–34, September–October, 1969.