Zobrazeno 1 - 10
of 47
pro vyhledávání: '"Lawrence D. Colebrook"'
Autor:
Laurance D. Hall, T. Adrian Carpenter, J. J. Attard, Jeeva P. Munasinghe, Lawrence D. Colebrook
Publikováno v:
Magnetic Resonance in Chemistry. 36:116-123
Proton spin–lattice relaxation rate constants (T1 values) of some selected urinary metabolites were analysed extensively by two different least-squares minimization procedures, based on the simplex and the Marquardt–Levenberg algorithms. Comparat
Publikováno v:
Tetrahedron Letters. 38:5411-5414
A conformationally stable, acridone-based linker (1) was synthesized and attached to p-tert-butylcalix[8]arene (2) to form the novel 1,4-bridged calix[8]arene derivative 3. The structural assignment of 3 was based on its MS and high-field NMR data an
Autor:
Valerie D. Geldart, Robert S. McDonald, Elizabeth C. Carmichael, Lawrence D. Colebrook, Georgia D. Spiropoulos, Sheila Rose, David B. Moore, Oswald S. Tee
Publikováno v:
Journal of the Chemical Society, Perkin Transactions 2. :2609-2620
Kinetic studies of the ring-opening and reclosure reactions of thiamine and three other thiazolium ions (Q+) in aqueous solution, in the pH range 0–13, have been carried out by stopped-flow and conventional UV–VIS spectrophotometry. At high pH, r
Publikováno v:
Carbohydrate Research. 241:267-272
The purpose of this Note is to draw attention to an operationally simple means whereby the speed of acquisition of certain two-dimensional (2D) nuclear magnetic resonance (NMR) experiments can be enhanced by at least ten-fold, effectively reducing th
Autor:
Lawrence D. Colebrook
Publikováno v:
ChemInform. 23
Energy profiles for internal rotation about the C—N pivot bond in a series of 1- and 3-aryl hydantoins and 3-aryl-2-thiohydantoins have been computed using the MMX molecular mechanics force field. ...
Autor:
Ning Qing, Lawrence D. Colebrook
Publikováno v:
ChemInform. 24
1H and 13C spin-lattice relaxation rates of the methyl groups of 15 steroids have been measured, and rotational barriers of the methyl groups have been calculated, using force field methods. Correlations between relaxation rates and computed rotation
Autor:
Lawrence D. Colebrook, Georgia D. Spiropoulos, David B. Moore, Sheila Rose, Robert S. McDonald, Elizabeth C. Carmichael, Oswald S. Tee, Valerie D. Geldart
Publikováno v:
ChemInform. 29
Kinetic studies of the ring-opening and reclosure reactions of thiamine and three other thiazolium ions (Q+) in aqueous solution, in the pH range 0–13, have been carried out by stopped-flow and conventional UV–VIS spectrophotometry. At high pH, r
Autor:
Leslie D. Field, Lawrence D. Colebrook, Gregory K. Pierens, T. A. Carpenter, Laurance D. Hall
Publikováno v:
Journal of Magnetic Resonance (1969). 99:398-402
Herchel Smith Laboratory for Medicinal Chemistry, University of Cambridge School of Clinical Medicine, lfniversity Forvie Site, Robinson Way, Cambridge CB2 2PZ, United Kingdom; *Department of Chemistry and Biochemistry, Concordia University, 1455 de
Autor:
Ning Qing, Lawrence D. Colebrook
Publikováno v:
Canadian Journal of Chemistry. 70:2154-2160
1H and 13C spin-lattice relaxation rates of the methyl groups of 15 steroids have been measured, and rotational barriers of the methyl groups have been calculated, using force field methods. Correlations between relaxation rates and computed rotation
Publikováno v:
Magnetic Resonance in Chemistry. 30:768-773
High-quality gradient-selective COSY spectra were recorded at 300 MHz for brucine and gibberellic acid and double-quantum filtered gradient-selective COSY spectra for brucine, using a single-frequency, high-resolution H-1 probe modified by the additi