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Now showing items 21-30 of 81
Somatic embryogenesis from zygotic embryos and shoot-tips of the Chilean tree Gomortega keule
(2012)
The endangered Chilean tree Gomortega keule (Mol.) Baillon produces edible fruit, making it a potential crop. However, its cultivation from seed or cuttings is extremely difficult. This paper reports the induction of somatic ...
Black carbon contribution in volcanic soils affected by wildfire or stubble burning
(2012)
Forest wildfire and stubble burning practices in agriculture contribute to the formation of black carbon (BC), a continuum of pyrogenic carbon ranging from slightly charred degradable biomass to highly condensed refractory ...
A non-Newtonian gradient for contour detection in images with multiplicative noise
(2012)
In this paper, a new operator for contour detection in images with multiplicative noise is presented. Traditional methods of edge detection, as those based in gradient operator or measures of variance, follow a logic and ...
The heterogeneous nature of urban poor families
(2012)
This paper addresses the scholarly debate on cultural homogeneity or heterogeneity of urban poor families. While authors such as Lewis (1959) or Wacquant (2000; 2001) claim that structural disadvantages are linked to a ...
Hydrogen peroxide induced phenylpropanoids pathway eliciting a defensive response in plants micropropagated in temporary immersion bioreactors (TIBs)
(2012)
The relation between the oxidative burst and phenylpropanoid pathways has been studied using the sugarcane cultivar C86-56, which does not release phenolics in agar-base micropropagation systems. In stationary liquid ...
On uniqueness of semi-wavefronts: Diekmann–Kaper theory of a nonlinear convolution equation re-visited
(2012)
Motivated by the uniqueness problem for monostable semi-wave -fronts, we propose a revised version of the Diekmann and Kaper theory of a nonlinear convolution equation. Our version of the Diekmann–Kaper theory allows (1) ...
Semiótica y teoría de la recepción: Los estudios literarios según Umberto Eco
(2012)
El presente artículo presenta una visión sintética de la evolución de la semiótica, cuya base se encuentra en el estudio de los filósofos presocráticos y sus indagaciones respecto de los signos y su significado. En segundo ...
Application of calcium, boron and sucrose on cut peony stems (Paeonia lactiflora Pall.) cv. Karl Rosenfield
(2012)
En flores de corte, deben existir objetivos claros en cuanto a la exportación, por lo tanto, es fundamental tener un manejo
adecuado de poscosecha, que permita mantener las flores por el mayor tiempo posible en condiciones ...
Loxoscelismo cutáneo: Una revisión narrativa de un problema actual
(2012)
The endemic presence of Loxosceles laeta species in Chile determinates a constant validity of loxoscelism in clinical practice. Among their clinical scope, cutaneous loxoscelism is the most common presentation and it usually ...
Calidad de vida de personas en hemodiálisis crónica: Relación con variables sociodemográficas, médico-clínicas y de laboratorio
(2012)
Objetivo: determinar la calidad de vida de personas en hemodiálisis crónica y su relación con variables sociodemográficas, médico-clínicas y de laboratorio. Método: estudio exploratorio, descriptivo, transaccional con ...