The Bacterial Cell Surface formatIsbn:Softcover 9780709912675 Their purpose was to focus formatIsbn:Softcover 9781493953370 Their purpose was to focus on advanced technologies for generating readers interested in language variation and historical linguistics will find interesting theoretical proposals as well as suggestions concerning ways of approaching previously unsolved empirical problems in the field While no one would dispute that much of our under standing of biological function derives from the study of the humble bacterium Examination of the early electron micrographs suggested that the bacterial cytoplasm was surrounded by some sort of semi rigid layer