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Mostrando ítems 1-10 de 1897
Openness of the induced map cn(f)
(Boletín de Matemáticas, 2009)
Given a map between compact metric spaces f : X-- and gt;Y , it is possible to induce a map between the n-fold hyperspaces Cn(f) : Cn(X) -- and gt; Cn(Y ) for each positive integer n. Let A and B be classes of maps. A ...
The formation of CN and CN+ by direct radiative association
(Iop Publishing Ltd, 2000-07-01)
Rate coefficients for direct radiative association of carbon and nitrogen atoms to form CN, and of carbon ions and nitrogen atoms to form CN+ ions, are calculated for temperatures in the range of 300 to 14,700 K. For the ...
ON SINGULAR VARIETIES ASSOCIATED TO A POLYNOMIAL MAPPING FROM C-n TO Cn-1
(Int Press Boston, Inc, 2018-12-01)
We construct singular varieties V-G associated to a polynomial mapping G : C-n -> Cn-1 where n >= 2. Let G : C-3 -> C-2 be a local submersion, we prove that if the homology or the intersection homology with total perversity ...
A MNDO STUDY OF THE C=N BOND FORCE-CONSTANTS OF CH3CN-BF3 AND CH3CN-BCL3
(Acad Brasileira De CienciasRio De JaneiroBrasil, 1987)
Full normal coordinate analysis and molecular dynamic parameters for the Cr (CN)3− 6 ion
(1986)
A full normal coordinate analysis for the Cr(CN)3− 6 ion, in octahedral symmetry, has been carried out on the basis of new experimental data, using three different force fields. Consistent sets of force constants have been ...
Teores de macro e micronutrientes e a relação c/n de várias espécies de plantas daninhas
(Sociedade Brasileira da Ciência das Plantas Daninhas, 1999-04-01)
O objetivo do presente trabalho foi determinar os teores de nutrientes (N, P, K, Ca, Mg, S, Cu, Zn, Fe e Mn) e a relação C/N, presentes na matéria seca da parte aérea das seguintes espécies de plantas daninhas: Ageratum ...
CN diatomic emission for N determination by LIBS
(2020-09-01)
The determination of N is an important demand for several sectors and the analytical features of laser-induced breakdown spectroscopy (LIBS) are very attractive to accomplish this task. In this work, a novel proposal for ...
5CN05 partitioning in an aqueous two-phase system: A new approach to the solubilization of hydrophobic drugs
(Elsevier B.V., 2014-09-01)
Liquid-liquid extraction for the purification of molecules has been central to many advances in the pharmaceutical industry. These processes were developed based on the property that some polymer and/or micellar solutions ...