An apparatus and method for determining the density and other properties of a formation surrounding a borehole using a high voltage x-ray generator. The method includes positioning a breast within a breast holder including a flexible membrane and creating at least a partial vacuum within the flexible membrane. A first agent process is registered with the first server process. A user can fold or unfold the folding chair by a single-handed operation, such as pushing or pulling on the back or pulling a handle. This bioadhesive carrier contains a diluent, an alkali metal alkylsulfate, a binding agent, at least one bioadhesive polymer and at least one sustained release polymer, as well as a method for its preparation. Due to the force applied by the seat user, the cushion and spacer structure are compressed, whereby simultaneously air is displaced out of the cushion.