2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/15458Direct URCA processes in a collapsing star envelope with a strong magnetic field are investigated. It is shown that in the toroidal magnetic field these processes can develope a torque which quickly unwinds an envelope. A general expression for a force density along the field direction is obtained. An influence of the neutrino unwinding effect on a dynamics of the collapsar envelope is discussed and numerically estimated.5 pages, LaTeX, Talk to GMIC-99 "The Universe of Gamow: Original ideas in Astrophysics and Cosmology", August 16-22, Odessa, UkraineAstrophysicstext