We prove that given a finite (zero) exact right decomposition (M, T ) of a semigroup S, if M is defined by a finite complete presentation then S is also defined by a finite complete presentation. Exact right decompositions are natural generalizations to semigroups of coset decompositions in groups. As a consequence we deduce that the Zappa-Szép extension of a monoid defined by a finite complete...

Chibnall, A. C., Haselbach, C., Mangan, J. L. & Rees, M. W. (1958a). Biochem. J. 68, 122. Chibnall, A. C., Mangan, J. L. & Rees, M. W. (1958b). Biochem. J. 68, 111. Chibnall, A. C. & Rees, M. W. (1952). Biochem. J. 52, iW. Chibnall, A. C. & Rees, M. W. (1953). In The Chemical Structure of Proteins, p. 70. Ed. by Wolstenholme, G. E. W. & Cameron, M. P. London: J. and A. Churchill Ltd. Desnuelle,...

Different samples have been prepared from different products in Chadormalu iron ore concentrator plant: Low intensity magnetite separators concentrate (magnetite concentrate), reverse flotation tail (final hematite concentrate), flotation concentrate (apatite concentrate), final tail (L.I.M.S. tail + reverse flotation concentrate+ apatite flotation tail). The samples were used for rare eart...