Artículos de revistas: Recent submissions
Now showing items 941-960 of 4968
-
(1992)Using dichotomy conditions, we obtain asymptotic formulae for the solutions of perturbed linear second order difference equations. © 1992.
-
(1992)For perturbations conditionally integrable. Levinson's theorems are obtained and applied to almost constant systems. © 1992.
-
(1974)The Lorentz-Dirac equation of motion for the electron is derived by a new method which makes tedious power series expansions unnecessary. Copyright © 1975 American Institute of Physics.
-
(1988)The influence of the donor-acceptor properties of several solvents on the Cr(CO)5 group in the solid [Cr(CO)5·solvent] complexes has been examined by spectroscopic methods. Relationships were found between the acceptor ...
-
(American Chemical Society, 1996)A combined methodology of semiempirical density functional (DFT) and Hartree-Fock (HF) theories is used to analyze the solution-phase proton-transfer (PT) process in the H2O⋯HX (X = F, Cl, and OH) model systems. Gas-phase ...
-
(1973)We have investigated the susceptibility of the Mattis Hamiltonian by means of Green's-function techniques and using a functional-integral formulation. It turns out that it is not possible to obtain an exact solution for ...
-
(1991)New developments in the continuum representation of solvent effects are presented. General expressions for the Helmholtz free energy of an arbitrary discrete charge distribution placed in spherical and spheroidal (oblate ...
-
(Sociedad Chilena de Quimica, 2001)In addition to azorellanol a new diterpenoid 7-deacetylazorellanol, has been isolated from the aerial parts oiLaretia acaulis (Cav.) Gill et Hook (Umbelliferae). Its structure was based on spectroscopic comparison with ...
-
(1992)Electrochemical reduction of nicergoline was studied at different pH and concentrations using differential pulse polarography and linear sweep voltammetry. Both techniques reveal that the reduction process occurs with ...
-
(1990)Hydroxamic acids were quantified by HPLC in leaves of one-week-old seedlings and in 30 day-old callus tissues of four wheat cultivars. Leaves accumulated preferentially 2,4-dihydroxy-7-methoxy-1,4-benzoxazin-3-one (DIMBOA). ...
-
(2003)C28H32N2O5. monoclinic, P121/a1 (No. 14), a = 9.5162(6) Å, b= 16.0013(9) Å, c = 17.8001(8)Å,β= 102.883(6)°, V = 2642.2 Å3, Z = 4, Rgt(F) = 0.051, wRref(F2) = 0.171, T= 293 K. © 2014, Oldenbourg Wissenschaftsverlag GmbH, ...
-
(Elsevier, 1998)Semiempirical Amsterdam Density Functional (ADF) and ab-initio (B3LYP) density functional theory (DFT) calculations are used to analyze the isomerization reaction MCN ⇔ MNC, for M = H, Li and Na systems. A molecular ...
-
(1994)Useful energy-density relationships, connected with the embedding of singly charged postive or negative atomic ions in polar solvents, are developed. The insertion of the atomic charged system into the polarizable host is ...
-
(Blackwell Publishing, 2001)In temperate rainforests on Chiloé Island in southern Chile (42°S), most canopy trees bear fleshy, avian-dispersed propagules, whereas emergent tree species have dry, wind-borne propagules. In the present study, the following ...
-
(1992)The crystal and molecular structure of bis-(N-phenyl-1-hydroxy-2-naphthylaldiminate) nickel(II) (1) have been determined by x-ray crystallography. The compound crystallizes in the triclinic space group P1, No. 2 with one ...
-
(1995)A Reply to the Comment by James W. Dufty, Roland Stamm, and Bernard Talin. © 1995 The American Physical Society.
-
(Czech Academy of Sciences, 1997)In olfactometric experiments a wingless adult of Sitobion avenae was attracted by odours of a wingless adult of Rhopalosiphum padi feeding on a wheat plant. When the stimulus consisted of either a wingless R. padi without ...
-
(2007)The existence of idempotent elements in plenary train algebras of rank greater than 3, is an open problem to be solved. J. Carlos Gutierrez's results on plenary train algebras in Gutierrez (2000) are based on the underlying ...