James Martin Stewart

Abstract

For the full versions of articles in this section see bmj.com ("Martin") joined the Royal Army Medical Corps, where he became interested in venereology. Martin then joined a practice in Oxford where he worked in venereology and developed an interest in student health. When he retired in 1986 Martin was college doctor to seven Oxford colleges. He was a police surgeon from the early 1960s and was secretary and president of the Oxford division of the BMA. Martin also sat on the local ethics committee for 15 years. He leaves a wife, Roberta; four children; and 11 grandchildren.

Crystal Growth of Two New Photoluminescent Oxides: Sr3Li6Nb2O11 and Sr3Li6Ta2O11

“…A similar approach was followed in our investigation of the electronic distribution of the excited state in Sr 3 Li 6 Nb 2 O 11 and Sr 3 Li 6 Ta 2 O 11 . Computation of the wave function of Sr 3 Li 6 Nb 2 O 11 using the MOPAC2007 package, unfortunately, did not lead to convergence. However, convergence was achieved upon using a non-default algorithm, yielding a wave function with a large highest occupied molecular orbital−lowest unoccupied molecular orbital (HOMO−LUMO) gap (∼7.5 eV) and no energetically localized LUMO.…”

“…Photoluminescence spectra were recorded on a Fluorat-02-Panorama UV−vis spectrofluorimeter at room temperature. Semiempirical PM6 calculations were performed using MOPAC2007, with periodic boundary conditions and geometries obtained from the single-crystal X-ray diffraction data of Sr 3 Li 6 M 2 O 11 ( M = Nb 5+ , Ta 5+ ).…”

Synthesis and characterization of a series of isoniazid hydrazones. Spectroscopic and theoretical study

“…The conformational space of the compounds was explored with the aid of the semiempirical PM6 method [12]. Several starting geometries derived from selected variations in C14eC10eC9eN2, C10eC9eN2eN1, N2eN1eC8eC1 and N1eC8eC1eC6 torsion angles were optimized (see Fig.…”

Crystal Growth of Sr3NaNbO6 and Sr3NaTaO6: New Photoluminescent Oxides

“…Calculations. Semiempirical PM6 calculations were performed using MOPAC2007, 33 with periodic boundary conditions and geometries obtained from the single crystal X-ray diffraction data of Sr 3 NaNbO 6 and Sr 3 NaTaO 6 .…”