It is provided ultrafine particles of a rutile titanium oxide obtained by maintaining the pH of an aqueous solution of a titanium compound having a Ti concentration of from 0. According to the present invention a fluid stream comprising an oxidant; nitrogen, hydrogen a hydrocarbonaceous material or mixtures thereof is introduced into the effluent flowing through a carbon black reactor in an axial direction. The mobile X-ray unit may further include an arm having a ball joint and a rotational joint. The receiver circuit includes a second external resistor, a third external resistor, and at least one receiver. An inflow passage is provided proximate the apex. One of a number of implementations includes using a deblocking filter in an inverse transformer loop and selectively disabling the filter upon certain conditions.