 However, in the presence of gas and the ensuing ionization, it would be problematic to separate this mode of detection out of the generally operating gaseous detection device.Hence this mode, by its definition, may be considered as unsustainable in the ESEM.Shah and Becket assumed the operation of the specimen absorbed current mode if the conductivity of their specimen was assured during the examination of wet botanical samples; in fact, Shah by 1987 still considered the ionisation products in gas by SE and BSE as a formidable obstacle, since he believed that the ionisation did not carry any information about the specimen.