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971.
972.
N. V. S. Rao D. M. Potukuchi P. V. Sankara Rao V. G. K. M. Pisipati 《Liquid crystals》1992,12(1):127-135
The variation of density with temperature across different phases for two homologues of the N(4-n-alkyloxybenzylidene)-4'-n-alkylanilines (9O.6 and 9O.8) exhibiting the SASCSFSG phase variant is determined. The influence of pretransitional effects in the fluctuation dominated non-linear region in the vicinity of the isotropic-smectic A transition and the nucleation growth analogy of this transition are discussed. 相似文献
973.
Anthony H. Jackson K. R. Nagaraja Rao N. Sim Ooi Esther Adelakun 《Tetrahedron letters》1984,25(52):6049-6050
Treatment of α-methylpyrroles with thallium (III) nitrate/Montmorillonite clay affords the corresponding α-formylpyrroles in excellent yields. 相似文献
974.
Dalpanin, isolated from the flowers ofDalbergia paniculata (Roxb.) has been characterised as aC-glycosylisoflavanone by chemical and spectral evidence. A provisional structure (IV) is assigned to this new compound. 相似文献
975.
976.
L3VV Auger transitions of copper alloys show a feature due to a band-like states, the shape and intensity of which depend on
the composition. The energy separation between this feature and the L3M4·5M4·5 peak increases progressively with Cu concentration. 相似文献
977.
The preparation and spectral properties are reported for a series of ten mixed-ligand copper(II) complexes of the form [Cu(A)(B)n](X), where A is acetylacetonate anion, B represents a mono- or bidentate ligand such as morpholine, piperidine, isonicotinic acid hydrazide, 2,2′-bipyridine, 1,10-phenanthroline and X is variously NO?3 or ClO?4 anion and n = 1 or 2. The coordination of the anions and ligands has been demonstrated by infrared and electronic spectral methods. Electron spin resonance spectral data show the square-pyramidal five-coordinated arrangement around copper(II) in these complexes. Parameters such as g6, g⊥, A6, A⊥, 〈g〉 and 〈A〉 calculated from electron spin resonance data in solid and solution state at room temperature as well as frozen solution indicate the presence of the unpaired electron in the dx2?y2 or dz2 orbital. These results are in good agreement with electronic and photoacoustic spectral studies. 相似文献
978.
979.
980.
Two non desarguesian flag transitive planes of order 34 whose Kernel is GF(3) are constructed. These planes are distinct from the planes of the same order contained in the class constructed by Narayana Rao M. L. (Proceedings of American Mathematical Society 39 (1973) 51–56) and Ebert, G.L. and Baker, R. (Enumeration of two dimensional Flag-Transitive planes, Algebras, Groups and Geometries 3 (1985) 248–257). The Flag Transitive group modulo the scalar collineations of these planes is generated by two elements and is of order 328. 相似文献