Results 11 to 20 of about 24,711 (178)

Hormigón de alta conductividad térmica POWERCRETE® [PDF]

open access: yesLibro de Comunicaciones / Livro das Comunicações, 2018
En la transmisión y la distribución de energía eléctrica en las grandes áreas urbanas de los países desarrollados es frecuente el soterramiento de cables de alta tensión, aprovechando así las ventajas estéticas, ecológicas y técnicas  que este procedimiento puede aportar.
Cruz Ramos, Deborah   +2 more
openaire   +4 more sources

Conductividad de alquilaminas oxietilenadas. [PDF]

open access: yesBoletín Intexter del Instituto de Investigación Textil y de Cooperación Industrial, 1982
Oxyethylenated alkylamines are surface agents which can be used as auxiliary products in wool and polyamide dyeing. The action of the dyeing auxiliary products depend largely on the dissolution state. This paper examines the conductivity of laurylamine and stearlylamine dissolutions with different levels of oxyethylenation, since the variation of ...
Riva Juan, Ascensión, Ribé Pons, José
core   +5 more sources

Estudio de la influencia de impurezas en la conductividad eléctrica de apatitas: el caso de CaHAp [PDF]

open access: yesRevista de Investigación de Física, 2012
En el presente trabajo se estudia la dependencia de la conductividad eléctrica de las apatitas respecto a la temperatura. Para ello, se propone un modelo de conductividad espectral que toma en cuenta las características más relevantes del material ...
R. M. Espinoza
doaj   +2 more sources

Conductividad y relajación en vidrios de Coulomb. [PDF]

open access: yes, 2013
Los sistemas físicos alejados del equilibrio resultan difíciles de estudiar, pues ni siquiera el concepto de temperatura se encuentra bien definido. El aporte fundamental de la Tesis Doctoral ``Conductividad y relajación en vidrios de Coulomb'' estriba en la caracterización del no equilibrio en los vidrios de Coulomb, mediante la extensión de ciertos ...
Caravaca Garratón, Manuel
openaire   +2 more sources

Cálculo de la conductividad hidráulica en un suelo no saturado

open access: yesCiencia e investigación agraria, 1981
Cálculo de la conductividad hidráulica en un suelo no ...
José Muñoz, Fernando Rodríguez
openaire   +2 more sources

Tree-ring structure determines the temporal coordination between xylem growth and the gain in hydraulic conductivity in the outermost ring. [PDF]

open access: yesNew Phytol
Summary The study of seasonal xylem hydraulics has predominantly focused on embolism‐induced losses, whereas growth‐driven increases in hydraulic capacity have received little attention. We assessed the intra‐annual dynamics of xylem formation and gain of conductivity in the current‐year ring of three species with contrasting tree‐ring structure ...
Fernández-de-Uña L   +4 more
europepmc   +2 more sources

A low-cost protocol for the optical method of vulnerability curves to calculate <i>P</i> <sub>50</sub>. [PDF]

open access: yesAppl Plant Sci
Abstract Premise The quantification of plant drought resistance, particularly embolism formation, within and across species, is critical for ecosystem management and agriculture. We developed a cost‐effective protocol to measure the water potential at which 50% of hydraulic conductivity (P50) is lost in stems, using affordable and accessible materials ...
González-Rebeles G   +3 more
europepmc   +2 more sources

CONDUCTIVIDAD Y PERCOLACION DE UN MATERIAL COMPUESTO: OXIDO MAGNETICO-POLIANILINA

open access: yesAvances en Ciencias e Ingeniería, 2013
El objetivo de este trabajo es estudiar la conductividad de un material compuesto (óxido de hierro /polianilina) a fin de determinar la relación mínima entre sus componentes que mantiene la interconexión entre las partículas de polianilina.
Juan C. Aphesteguy, Silvia E. Jacobo
doaj   +1 more source

Groundwater mapping and locally engaged water governance in a small island terrain: Case study of Karainagar island, Northern Sri Lanka

open access: yesWorld Water Policy, Volume 9, Issue 3, Page 456-480, August 2023., 2023
Abstract Groundwater is a vital resource under threat in island communities. Karainagar, a 22 km2 island, is one of seven islands off the coast of Jaffna in Northern Sri Lanka, with its population of just about 11,000 persons, experiences seasonal water shortage, and salinity in groundwater as twin threats impacting on their lives.
Inthirakumaran Karthiga   +3 more
wiley   +1 more source

Metamorphosis and seasonality are major determinants of chytrid infection in a paedomorphic salamander

open access: yesAnimal Conservation, Volume 26, Issue 3, Page 340-354, June 2023., 2023
In this study, we aimed to determine the influence of metamorphic status (gilled or non‐gilled individuals) and environmental factors on the infections caused by the fungal pathogen Batrachochytrium dendrobatidis in an endangered facultative paedomorphic salamander from Mexico. We found that B.
M. D. Basanta   +6 more
wiley   +1 more source

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