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Mostrando ítems 41-50 de 192
Artículo
The Location of Stellar Clusters in the Big Dent: an Age Gradient along the Z-Axis
(IOP Publishing Ltd., 1995-07-20)
The ages and locations of stellar clusters and individual Cepheid stars in the depression called the "Big Dent" are analyzed. The Z-locations of the cluster sample display a well-defined Z-age stratification. The Cepheid ...
Artículo
Effect of Glucose Utilization on Nitrite Excretion by the Unicellular Cyanobacterium Synechocystis sp. Strain PCC 6803
(American Society for Microbiology, 1993)
Up to 1 mM nitrite was excreted by Synechocystis strain 6803 cells growing under mixotrophic or photoheterotrophic conditions. This excretion is not due to a lower ratio of nitrite and nitrate reductase activities in the ...
Artículo
Increased Cysteine Availability is Essential for Cadmium Tolerance and Accumulation in Arabidopsis Thaliana
(Wiley Open Access, 2004)
Employing genetic transformation using an Atcys-3A cDNA construct expressing the cytosolic O-acetylserine(thiol)lyase (OASTL), we obtained two Arabidopsis lines with different capabilities for supplying cysteine under metal ...
Artículo
Thermal transport in glassy selenium: The role of low-frequency librations
(American Institute of Physics Publising LLC, 1994)
The experimental curves giving the temperature dependence of the thermal conductivity of glassy selenium are considered in detail. The observed behavior can be taken into account quantitatively if the densities of states ...
Artículo
Detection and analysis of genetic variation in Salicornieae (Chenopodiaceae) using random amplified polymorphic DNA (RAPD) markers
(International Bureau for Plant Taxonomy and Nomenclature, 1995)
Representatives of Arthrocnemum, Salicornia and Sarcocornia were analysed using RAPO. The methods used were optimized by testing different conditions of the parameters. The genetic characterization of the mentioned taxa ...
Artículo
Continuous division of differential operators
(Association des Annales de l'Institut Fourier, 2001)
In this paper, we give a new proof of the continuity of division by differential operators with analytic coefficients, originally proved by Mebkhout and the second author. Our methods come from the proof of the Constant ...
Artículo
Logarithmic differential operators and logarithmic de Rham complexes relative to a free divisor
(Elsevier, 1999)
We prove a structure theorem for differential operators in the 0-th term of the V-filtration relative to a free divisor. manifold. As an application, we give a formula for the logarithmic de Rham complex with respect to a ...
Artículo
Simulation study of the link between molecular association and reentrant miscibility for a mixture of molecules with directional interactions
(American Physical Society, 1999-06-28)
The reentrant liquid-liquid miscibility of a symmetrical mixture with highly directional bonding interactions is studied by Gibbs ensemble Monte Carlo simulation. The resulting closed loop of immiscibility and the corresponding ...
Artículo
Orígenes, ampliación y aplicaciones de la equivalencia de estímulos
(Colegio Oficial de Psicología de Andalucía Occidental, 2002)
El presente trabajo es una revisión sobre las líneas actuales de investigación dentro del fenómeno de las clases de equivalencia, cuya principal característica es la emergencia de relaciones de control de estímulos sin ...
Artículo
Homotopy in digital spaces
(Elsevier, 2003-01-15)
The main contribution of this paper is a new “extrinsic” digital fundamental group that can be readily generalized to define higher homotopy groups for arbitrary digital spaces. We show that the digital fundamental group ...