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121.
122.
[reaction: see text] Vinylsilanes are formed in high yields in the reaction of representative acyl(trimethyl)silanes with anions generated from Kocienski's sulfones. 相似文献
123.
We observe that the saturation model of deep inelastic scattering predicts a geometric scaling of the total gamma(*)p cross section in the region of small Bjorken variable x. The geometric scaling in this case means that the cross section is a function of only one dimensionless variable tau = Q(2)R(2)(0)(x), where the function R(0)(x) decreases with decreasing x. We show that the experimental data from HERA in the region x<0.01 confirm the expectations of this scaling over a very broad region of Q(2). We suggest that the geometric scaling is more general than the saturation model. 相似文献
124.
We consider local field theory on κ-deformed Minkowski space which is an example of solvable Lie-algebraic noncommutative
structure. Using integration formula over κ-Minkowski space and κ-deformed Fourier transform, we consider for deformed local
fields the reality conditions as well as deformation of action functionals in standard Minkowski space. We present explicit
formulas for two equivalent star products describing CBH quantization of field theory on κ-Minkowski space. We express also
via star product technique the noncommutative translations in κ-Minkowski space by commutative translations in standard Minkowski
space.
Presented at the 9th Colloquium “Quantum Groups and Integrable Systems”, Prague, 22–24 June 2000.
Presented by J. Lukierski. 相似文献
125.
Rud Wegscheider Leo Ritter Kuśy v. Dúbrav 《Monatshefte für Chemie / Chemical Monthly》1903,24(10):805-831
Ohne Zusammenfassung 相似文献
126.
The absorption of the secondary hadrons in nuclear matter is studied as a function of their flavour dependent inelastic cross section on nucleons. In particular the ratiosK +/π+ andK ?/π? of particles produced in the proton-nucleus high energy interactions are examined and described in the very simple phenomenological model. The enhanced production ofK + mesons is explained by their relatively small interaction. The presence of the initial particle absorption is clearly demonstrated forx F>0.5. 相似文献
127.
This work describes a novel type of working electrode for use in voltammetry and polarography — the renewable silver liquid amalgam film–modified silver solid amalgam annular band electrode (AgLAF–AgSAE). The electrode is produced by mechanically refreshing the silver liquid amalgam film (AgLAF) before each measurement. The main constituents of the electrode are: a specially constructed silver solid amalgam annular band electrode (AgSAE), two silicon O-rings, silver liquid amalgam and a polypropylene electrode body. Contaminants from the analyzed solution are removed and the AgSAE surface is covered with a thick layer of fresh amalgam while pulling the AgSAE into the sensor body. During movement in the reverse direction AgLAF is formed and homogenized. The time needed to refresh the film is less than 1 s. The electrode is characterized by excellent surface repeatability (~ 1%) and long-term stability (over ten thousand measurement cycles). 相似文献
128.
The star product technique translates the framework of local fields on noncommutative spacetime into nonlocal fields on standard spacetime. We consider the example of fields on κ-deformed Minkowski space, transforming under κ-deformed Poincaré group, with noncommutative parameters. By extending the star product to the tensor product of functions on κ-deformed Minkowski space and κ-deformed Poincaré group we represent the algebra of noncommutative parameters of deformed relativistic symmetries by functions on classical Poincaré group. 相似文献
129.
Irwin Kra 《Israel Journal of Mathematics》1987,60(1):89-127
The paper treats two topics. We obtain new characterizations of quasidiscs using theλ-lemma. We study regularb-groups by combining results on holomorphic families of injections with theorems on algebraic convergence of Kleinian groups
and the structure of the Eichler cohomology spaces. We also obtain results about projective structures whose developing maps
are coverings.
Research partially supported by NSF grant DMS 8401280. 相似文献
130.