Mycobacterium VOLUME

David Morgan is a member of the Chemical Ecology Group at Keele University. He was bom in Newfoundland and had his university education there, at Dalhousie University and University of King s College in Halifax, Nova Scotia, and at Oxford. His doctorate thesis was on the lipids of Mycobacterium tuberculosis. He later worked at the National Institute for Medical Research in London, and for Shell Chemical Company and Shell Research under the direction of Sir Robert Robinson, O.M., Nobel Laureate. From 1966 he has been at Keele in Staffordshire as lecturer, senior lecturer, reader, and professor. He discovered the natural pesticide azadirachtin and collaborated with S. V. Ley for its final structure elucidation. He is the author of over 300 papers and reviews, mostly on insect chemistry, editor, and contributor to several volumes and author of the book Biosynthesis in Insects. ... 

Separation of the Licheniformins. Analyzable quantities of three licheniformins can be separated by paper chromatography, using as solvent, a mixture of collidine + lutidine -t- 2N aqueous ammonia, 1 1 2 by volume. The peptides can be revealed on the paper either by the ninhydrin reaction or by antibiotic activity tests, manifested when the paper is placed in contact with an agar culture of sensitive bacteria such as Staphylococcus aureus or Mycobacterium phlei. 

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