We report the formation of two polyoxotungstates of the general formula [M6(PW6O26)(α-P2W15O56)2(H2O)2](23-) (M = Co(II) or Mn(II)), which contain {PW6} fragments generated from the [P2W15O56](12-) precursor, which demonstrates for the first time the transformation of a Dawson lacunae into a Keggin lacunary building block. Solution analysis of the clusters has been conducted via electrospray io...

Correspondence to Prof David W Yates, Emergency Medicine, Clinical Sciences Building, Hope Hospital, Salford M6 8HD, UK 'For those interested in the advances in this branch of medical science, and especially those about to enter this field of study, there could be no better starting-off ground than the present volume, in which the articles are written by experts and by those who have contribute...

By using the antisymmetry characteristic method implemented in computer programs written in Mathematica 4, from 230 space symmetry groups are derived 1191 Mackay groups of the type M1, 5005 groups of the type M2, 19467 groups of the type M3, 72587 groups of the type M4, 191728 groups of the type M5, and 598752 groups of the type M6. Mackay groups are the minimal representation of Zamorzaev’s mu...

Unilateral wheeze in the immunocompromised patient with unremitting fever may be the first localising sign of aspergillus tracheobronchitis. Two such cases are presented. (Thorax 1993;48:1285-1287) Departnent of Haematology R C Tait Department of Thoracic Medicine B R O'Driscoll Department of Infectious Diseases (University of Manchester) DW Denning Hope Hospital, Eccles Old Road, Salford M6 8H...

SUZY STOKES, NICK S. KALSON, MARK EARL, ADAM G. WHITEHEAD, IAN TYRRELL-MARSH, HANNAH FROST, ANDREW DAVIES Clinical Education Centre, University Hospital of North Staffordshire, Stoke-on-Trent ST4 6QG, UK Manchester University Medical School and MARS—Manchester Altitude Research Society, The Medical School, University of Manchester, Stopford Building, Oxford Road, Manchester M13 9PL, UK Hope Hos...

Let Mg(2) be the moduli space of curves of genus g with a level-2 structure. We prove that there is always a non hyperelliptic element in the intersection of four thetanull divisors in M6(2). We prove also that for all g > 3, each component of the hyperelliptic locus in Mg(2) is a connected component of the intersection of g−2 thetanull divisors.