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31.
Frontispiece: Electrochemiluminescence Bioassays with a Water‐Soluble Luminol Derivative Can Outperform Fluorescence Assays
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Andrew J. Thompson Jerome Dabin Javier Iglesias‐Fernndez Albert Ardvol Zoran Dinev Spencer J. Williams Omprakash Bande Aloysius Siriwardena Carl Moreland Ting‐Chou Hu David K. Smith Harry J. Gilbert Carme Rovira Gideon J. Davies 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2012,124(44):11333-11333
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U. Domiaty D. Gruber L. Windholz S. G. Dinev M. Allegrini G. De Filippo F. Fuso R. -H. Rinkleff 《Applied physics. B, Lasers and optics》1994,59(5):525-531
Parametric four-wave mixing, stimulated electronic Raman scattering and amplified spontaneous emission cascades have been studied experimentally by single-photon resonant and near-resonant excitation of the 42
P levels of dense sodium vapour. The dependence of emission intensities on laser detuning and exciting laser power is discussed. 相似文献
36.
S. G. Dinev G. B. Hadjichristov I. L. Stefanov 《Applied physics. B, Lasers and optics》1989,49(6):521-525
The interaction between stimulated electronic Raman scattering and four wave parametric emission in potassium has been studied on the basis of common real states and emission channels. The modified intensity Stokes dependence and higher saturation pump intensity have been accounted for by the model developed. Two tunable pump waves are used to initiate the two steps, involving a dipole forbidden 4S – 3D transition. 相似文献
37.
S. Baluschev A. Dreischuh I. Velchev S. Dinev O. Marazov 《Applied physics. B, Lasers and optics》1995,61(1):121-124
The formation of two-Dimensional (2D) odd dark spatial solutions is analyzed numerically at an initial helical dark-beam phase distribution. Experimental results are presented for the first time confirming the existence of two-dimensional optical even dark solitons (ring dark solitons). Several aspects of the evolution of input 1D and 2D odd/even dark beams are compared qualitatively. 相似文献
38.
From relaxation investigations on the electric charge of the electrically polarized polymer, physical aspects of the effect of tri-basic lead sulphate, as a stabilizer, on the dielectric relaxation properties of PVC are considered. The results correlate with the established fact that tri-basic lead sulphate as a dispersion additive has a marked influence on the process of structure formation, changing the dielectric relaxation properties of the polymer. 相似文献
39.
Changes of the refractive index for homologous series of hydrocarbons are usually plotted versus the density. While there is a clear linear dependence for alkanes and alkenes, the linearity deteriorates for homologous series with functional groups involving heteroatoms. The slope can even become negative, e. g., for carboxylic acids. For gaining a deeper understanding and to establish a more general correlation, we reinvestigate the corresponding theories starting with the Newton-Laplace, Gladstone-Dale and the Lorentz-Lorenz rules. We revisit the concept of molar refractivity pioneered by Landolt and Brühl and show that it is closely connected with a twin of Beer's law. We conclude that the refractive index of homologues series should better be plotted versus the molar concentration of the main UV-chromophore, the C−H bond, which actually causes the refractive index changes. This new approach is not limited to alkanes and alkenes but holds for homologous series with functional groups including heteroatoms. 相似文献
40.
Prof. Dr. Bikshandarkoil R. Srinivasan Santosh Y. Shetgaonkar PD Dr. Christian Näther 《无机化学与普通化学杂志》2011,637(1):130-136
The preparation, crystal structures, and thermal properties of [Ca(pyr)2(4‐nba)2]n ( 1 ) (pyr = pyrazole; 4‐nba = 4‐nitrobenzoate) {[Ca(H2O)2(3‐npth)] · H2O}n ( 2 ) (3‐npth = 3‐nitrophthalate), [Mg(H2O)5(3‐npth)] · 2H2O ( 3 ), and [Mg(H2O)4(2‐nba)2] ( 4 ) (2‐nba = 2‐nitrobenzoate) are reported. The anhydrous CaII compound 1 and the diaqua CaII‐3‐nitrophthalate monohydrate 2 are one‐dimensional coordination polymers containing a hexacoordinate CaII ion located on a center of inversion in 1 and a heptacoordinated CaII ion in 2 . In 1 , the 4‐nitrobenzoate moiety acts as a μ2‐bridging bidentate ligand, whereas the 3‐nitrophthalate anion exhibits a μ3‐bridging pentadentate coordination mode in 2 . The hexacoordinate MgII‐containing compounds 3 and 4 do not contain a [Mg(H2O)6]2+ unit and the central MgII ion is coordinated to at least one monodentate carboxylate unit namely the monodentate 3‐npth molecule in 3 and two trans monodentate 2‐nba molecules in 4 . Hydrogen bonding between the lattice water molecules results in the formation of a water dimer in 3 . A comparative study of 17 alkaline earth nitrocarboxylates is described. 相似文献