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21.
Liu X McLaughlin AC de Miranda MP McInnes EJ Kilner CA Halcrow MA 《Chemical communications (Cambridge, England)》2002,(24):2978-2979
The complex [[Cu3(HpztBu)4(mu-pztBu)2(mu-F)2(mu 3-F)]2]F2 (HpztBu = 3[5]-tert-butylpyrazole) has a cyclic, C2v-symmetric hexacopper core. The two non-coordinated F- anions are encapsulated within cavities formed by three HpztBu ligands. 相似文献
22.
K. T.-R. McLaughlin A. H. Vartanian X. Zhou 《Mathematical Physics, Analysis and Geometry》2008,11(3-4):187-364
Orthogonal rational functions are characterized in terms of a family of matrix Riemann–Hilbert problems on ?, and a related family of energy minimisation problems is presented. Existence, uniqueness, and regularity properties of the equilibrium measures which solve the energy minimisation problems are established. These measures are used to derive a family of ‘model’ matrix Riemann–Hilbert problems which are amenable to asymptotic analysis via the Deift–Zhou non-linear steepest-descent method. 相似文献
23.
In this paper we extend the plane blow-up results of Grundy& McLaughlin (1997) to the three-dimensional Navier-Stokes equations.Using a solution structure originally due to Lin we first providenumerical evidence for the existence of blow-up solutions on- < x, z < , 0 y 1 with boundary conditions on y = 0and y = 1 involving derivatives of the velocity components.The formulation enables us to consider plane and radial flowas special cases. Various features of the computations are isolatedand are used to construct a formal asymptotic solution closeto blow-up. We show that the numerical and asymptotic analysesprovide a mutually consistent global picture which supportsthe conclusion that, for the family of problems we considerhere, blow-up in fact can take place in three dimensions butat an inverse linear rate rather than the faster inverse squareof the plane case. 相似文献
24.
25.
T. Hadeishi H. Koizumi R.D. McLaughlin J.E. Millaud 《Spectrochimica Acta Part B: Atomic Spectroscopy》1982,37(6):501-509
A highly specific technique for real time monitoring of simple and complex molecules is described. This technique depends on using the Zeeman effect to tune an atomic emission line to coincide with a sharp molecular absorption feature and has been named TALMS (Tunable Atomic Line Molecular Spectroscopy). Results are presented on the determination of di-atomic (NO), tri-atomic (NO2, SO2), tetra-atomic (H2CO) and more complex molecules. An explanation is offered for the ability of this technique to determine complex molecules, which suggests that the method should be highly specific. It is concluded that work in this area will lead to instrumentation that will be valuable for process control or environmental monitoring. 相似文献
26.
Ruthenium(II) bis(terpyridine) complexes have been prepared with two triethylene glycol linkers to which DNA sequences have been attached; hybridization at various complex ratios results in linear arrays of varying lengths. 相似文献
27.
P. Lemoine S.S. Roy J.P. Quinn P.D. Maguire J.A.D. McLaughlin 《Applied Physics A: Materials Science & Processing》2007,86(4):451-456
We present a comparative study where carbon nanostructures were prepared by electron and ion beam methods. Thin films of 10×10 μm2 area were prepared and analysed by Raman analysis, nanoindentation, energy dispersive X-ray analysis (EDX) and atomic force
microscopy (AFM). The material formed is not soft and graphitic, but of intermediate hardness (6–13 GPa) and with Raman spectral
features similar to those of hydrogenated amorphous carbon, although it contains a significant Ga content (up to 25 at. %).
This study was used to form sharp AFM supertip structures which were used to image sintered ceramic samples and films of aligned
carbon nanotubes. Compared to traditional Si tips, this gave an improved rendering of the sample’s aspect ratio although the
resolution is limited by the diameter of the C supertips.
PACS 81.05.Uw; 81.07.-b; 78.30.-j 相似文献
28.
James McLaughlin Andrew V. Sills 《Journal of Mathematical Analysis and Applications》2008,344(2):765-777
We present several new families of Rogers-Ramanujan type identities related to the moduli 18 and 24. A few of the identities were found by either Ramanujan, Slater, or Dyson, but most are believed to be new. For one of these families, we discuss possible connections with Lie algebras. We also present two families of related false theta function identities. 相似文献
29.
30.
Perdeuterated benzofluoranthenes have slightly shorter retention times than their equivalent unlabeled forms in a DB-5 capillary column. Under column overload conditions, perdeuterated benzofluoranthenes in moderate multifold excesses, which might be encountered in their use as internal standards and carriers for quantitative analysis, are seen to exhibit both normal and reverse solvent effects on their close eluting congeners. In some cases the effects may be used to advantage by knowledgeable analysts, but for the ignorant and unwary the effects can lead to serious errors in identification and quantification. 相似文献