2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/213981The interaction between large internal motion of DNA surrounded by bio-fluid is investigated. The phenomenon is modelled using the relativistic Navier-Stokes lagrangian describing the bio-fluid coupled to the standard Klein-Gordon lagrangian describing the DNA. It is shown that the equation of motion at non-relativistic limit, v << c, reproduces the well-known Sine-Gordon equation. The effect of the interaction in a single soliton solution is also given and discussed.4 pages, 1 figureFluid DynamicsBiological Physicstext