Search results for " LAB"
showing 10 items of 2393 documents
Internal employability as a strategy for key employee retention
2014
Las economías alrededor del mundo, en especial en países delsur de Europa, están sufriendo los paralizantes efectos de la extremadamentecompleja crisis económica y financiera. Este estudio examina el impactode ciertas políticas de recursos humanos enfocadas a incrementarla empleabilidad interna como un medio para retener a los empleados valiososy para promover la flexibilidad laboral dentro de la empresa, asícomo para incrementar las actitudes positivas hacia la ciudadanía organizacional.Se proponen la satisfacción y el compromiso como variables queintermedian la relación entre la empleabilidad interna percibida y la intenciónde abandonar la empresa y sobre el desarrollo de comportamientode…
Buying private label in durables: Gender and other psychological variables
2017
Abstract In the context of durables, this paper analyzes some key psychological variables identified in convenience goods literature, for individuals facing private label purchase decisions: private label attitude, price consciousness, brand consciousness and involvement with the product. The role of gender in the relationships among those variables is also examined. On two different durables and with a sample of 432 individuals, all the proposed relationships are significant, except for price consciousness. Additionally, some gender differences among those relationships appear. Data suggest that being a woman (not a man) plays a key role in private label purchase intention.
Organización del trabajo y culturas laborales en los feminizados almacenes de la globalización agroalimentaria
2021
La globalización del sistema agroalimentario ha transformado la organización del trabajo en los campos y almacenes agrícolas. El almacén de manipulado y confección de frutas y hortalizas constituye un lugar clave para analizar las estrategias de acumulación de la agroindustria y sus efectos sobre la organización social del trabajo, en particular, la relación entre estas estrategias y los procesos de feminización y desvalorización del trabajo agrícola. Una desvalorización del trabajo femenino que es un elemento clave en la competitividad del sector agrícola y se apoya –y legitima– en una cultura del trabajo determinada. Este artículo examina la forma que adquiere esta relación y sus implicac…
Self-assembled PAA-based nanoparticles as potential gene and protein delivery systems
2012
A series of nanoparticles is prepared via layer-by-layer assembly of oppositely charged, synthetic biocompatible polyamidoamine polymers as potential carriers. Particle size, surface charge and internal chain mobility are quantified as a function of the polymer type and number of layers. The effect of addition of surfactant is examined to simulate the effects of nanoparticle dissolution. The cyctotoxicity of these particles (in epithelia and murine cell lines) are orders of magnitude lower than polyethyleneimine controls. Stable nanoparticles may be prepared from mixtures of strongly, oppositely charged polymers, but less successfully from weakly charged polymers, and, given their acceptabl…
Biodegradable Polymers for the Production of Nets for Agricultural Product Packaging
2021
It is well known that the need for more environmentally friendly materials concerns, among other fields, the food packaging industry. This regards also, for instance, nets used for agricultural product (e.g., citrus fruits, potatoes) packaging. These nets are typically manufactured by film blowing technique, with subsequent slicing of the films and cold drawing of the obtained strips, made from traditional, non-biodegradable polymer systems. In this work, two biodegradable polymer systems were characterized from rheological, processability, and mechanical points of view, in order to evaluate their suitability to replace polyethylene-based polymer systems typically used for agricultural prod…
Oil-in-Water fL Droplets by Interfacial Spontaneous Fragmentation and Their Electrical Characterization
2019
Inkjet printing is here employed for the first time as a method to produce femtoliter-scale oil droplets dispersed in water. In particular, picoliter-scale fluorinated oil (FC40) droplets are printed in the presence of perfluoro-1-octanol surfactant at a velocity higher than 5 m/s. Femtoliter-scale oil droplets in water are spontaneously formed through a fragmentation process at the water/air interface using minute amounts of nonionic surfactant (down to 0.003% v/v of Tween 80). This fragmentation occurs by a Plateau-Rayleigh mechanism at a moderately high Weber number (10(1)). A microfluidic chip with integrated microelectrodes allows droplets characterization in terms of number and diamet…
Testing laboratory methods to determine the anisotropy of saturated hydraulic conductivity in a sandy–loam soil
2009
Abstract Anisotropy, a (the log of the ratio of horizontal to vertical conductivity, log 10 ( K h / K v )), of saturated soil hydraulic conductivity, K s , affects transport processes in soil but is not routinely measured, probably because practical and validated methods are lacking. The objective of this investigation was to determine the effects of different constant-head laboratory and sampling procedures on anisotropy of saturated hydraulic conductivity measurements. The sequence of K s measurements was varied (vertical conductivity, K v , first, then horizontal, K h , second and vice versa) for an experimental set-up considering five variables: 1) water ponding type (Mariotte or siphon…
MOF-Mediated Synthesis of Supported Fe-Doped Pd Nanoparticles under Mild Conditions for Magnetically Recoverable Catalysis**
2020
Metal–organic framework (MOF)-driven synthesis is considered as a promising alternative for the development of new catalytic materials with well-designed active sites. This synthetic approach is used here to gradually transform a new bimetallic MOF, with Pd and Fe as the metal components, by the in situ generation of aniline under mild conditions. This methodology results in a compositionally homogeneous nanocomposite formed by Fe-doped Pd nanoparticles that, in turn, are supported on iron oxide-doped carbon. The nanocomposite has been fully characterized by several techniques such as IR and Raman spectroscopy, TEM, XPS, and XAS. The performance of this nanocomposite as an heterogeneous cat…
Self-Assembled Monolayer-Functionalized Half-Metallic Manganite for Molecular Spintronics
2012
(La,Sr)MnO(3) manganite (LSMO) has emerged as the standard ferromagnetic electrode in organic spintronic devices due to its highly spin-polarized character and air stability. Whereas organic semiconductors and polymers have been mainly envisaged to propagate spin information, self-assembled monolayers (SAMs) have been overlooked and should be considered as promising materials for molecular engineering of spintronic devices. Surprisingly, up to now the first key step of SAM grafting protocols over LSMO surface thin films is still missing. We report the grafting of dodecyl (C12P) and octadecyl (C18P) phosphonic acids over the LSMO half-metallic oxide. Alkylphosphonic acids form ordered self-a…
Beta-forging of Ti6Al4V titanium alloy powders consolidated by HIP: Plastic flow and strain-rate relation
2014
Ti6Al4V is probably the best known and studied titanium alloy, not only for aerospace applications. Nevertheless the deformation behavior still represents a challenge if any modification in the deformation process is required or introduced. This work deals with deformation behavior description of Ti6Al4V HIPped powders during high temperature deformation tests carried on in the Beta-region. Laboratory compression and tensile tests have been coupled with relaxation tests in order to achieve robust data about strain rate sensibility m-coefficient and activation energy Q. These results have been fitted for the assessment of a more general exponential deformation law. The final result is a “Dor…