Search results for "Chemical engineering"
showing 10 items of 5892 documents
Los estudios sobre calidad de vida y la perspectiva de la Psicología Positiva
2015
Las investigaciones sobre calidad de vida se desarrollaron a partir de la década del 70, si bien el antecedente del concepto data de los años 30 en Europa. En la actualidad, ha quedado establecido que la propuesta teórica de la calidad de vida alberga, como un paraguas, diferentes campos temáticos -la salud, el bienestar psicológico, el desarrollo económico, la vida social, las políticas públicas, la espiritualidad- comprendiendo dos dimensiones: la subjetiva y la objetiva. De esta manera, para estudiar y comprender la calidad de vida se requiere del aporte de diferentes disciplinas, convirtiéndose de esta manera en un concepto multidimensional. La psicología ha contribuido a la i…
Evaluadores de Psicodebate 14(1)
2015
Evaluadores de Psicodebate 14(1)
Hijos que tienen déficit de atención
2005
Se presentan datos preliminares obtenidos a través de una muestra en la que se aplicó un modelo de intervención psicosocial cognitivo-conductual-(TCC) de manejo parental grupal dentro del marco de las terapias breves, para padres de niños en edad escolar con conducta disruptiva (CD) y déficit atencional con y sin hiperactividad (TDAH). La experiencia se realiza en un Hospital General de la capital, con 8 familias que fueron referidas al programa. El marco teórico utilizado se basa en: 1- los problemas específicos que presentan los niños con déficit atencional con y sin hiperactividad y el stress considerable que impone a la familia hacer frente a las conductas disruptivas de estos …
Physicochemical Properties of A New PEGylated Polybenzofulvene Brush for Drug Encapsulation
2019
A new polymer brush was synthesized by spontaneous polymerization of benzofulvene macromonomer 6-MOEG-9-T-BF3k bearing a nona(ethylene glycol) side chain linked to the 3-phenylindene scaffold by means of a triazole heterocycle. The polymer structure was studied by SEC-MALS, NMR spectroscopy, and MALDI-TOF MS techniques, and the results supported the role of oligomeric initiatory species in the spontaneous polymerization of polybenzofulvene derivatives. The aggregation features of high molecular weight poly-6-MOEG-9-T-BF3k-FE were investigated by pyrene fluorescence analysis, dynamic light scattering studies, and transmission electron microscopy, which suggested a tendency towards the format…
Embodying Memories: The Women Rights Movement „#NiUnaMenos “ and the Women Narratives about State Repression in Argentina
2017
Desde 2015, un nuevo movimiento de derechos humanos lucha contra la violencia contra las mujeres:Ni una menos. Desde la perspectiva de los estudios culturales, existe un fuerte vinculo entre estas mujeres que luchan por la transformacion cultural y la duradera batalla contra el olvido llevada a cabo por el Movimiento Argentino de Derechos Humanos y, especialmente, por lasMadresy las Abuelasde PlazadeMayo. En el contexto del terrorismo de Estado y su literatura escrita por mujeres, esta contribucion refleja la metodologia para estudiar la literatura femenina de Argentina sobre la represion estataly tambien sobre el papel de las mujeres como agentes de transformacion social.
A Study of Mechanical Properties of Polymer Composite Membranes with Various Ionic Liquids at Elevated Temperatures
2019
This work was supported by Latvian Council of Science (Cooperation project No.666/2014.4).
Wo3 and ionic liquids: A synergic pair for pollutant gas sensing and desulfurization
2020
This review deals with the notable results obtained by the synergy between ionic liquids (ILs) and WO3 in the field of pollutant gas sensing and sulfur removal pretreatment of fuels. Starting from the known characteristics of tungsten trioxide as catalytic material, many authors have proposed the use of ionic liquids in order to both direct WO3 production towards controllable nanostructures (nanorods, nanospheres, etc.) and to modify the metal oxide structure (incorporating ILs) in order to increase the gas adsorption ability and, thus, the catalytic efficiency. Moreover, ionic liquids are able to highly disperse WO3 in composites, thus enhancing the contact surface and the catalytic abilit…
Influence of Biomass Combustion Products on Element Content and Thermal Stability of Latvian Sheep Breed Wool Filter Fibres
2020
Sheep wool is natural, easy obtainable, renewable and biodegradable material with a perspective application as a sorbent in filters for purification of industrial emissions from various environmental pollutants. The element content and thermal stability of Latvian dark-headed sheep wool filter fibres was analysed and described before and after exposure to biomass combustion products. Based on the obtained results, it is concluded that the sheep wool filter fibres can sorb various gaseous combustion products, such as carbon monoxide (CO), carbon dioxide (CO2) and nitrogen oxides (NOx), however, the sorption processes of these gases are irreversible. The obtained results of total reflection X…
Growth and Electrochemical Performance of Lead and Lead Oxide Nanowire Arrays as Electrodes for Lead-Acid Batteries
2013
n this work, we present the growth and electrochemical performance of nanostructured lead and lead oxide electrodes for lead-acid batteries. The electrodes were obtained by template electrodeposition in polycarbonate membranes, acting as template. Electrochemical tests were conducted at constant current in 5M aqueous solution of sulphuric acid, after assembling nanostructured lead and lead oxide electrodes in a zero-gap configuration using a commercially available separator. The main advantages of these electrodes are the high specific energy and power density, and the wide surface area, about 70 times higher than the geometrical one. These features allowed high discharge rates, up to 20C. …
Fluorescent Biosensors Based on Silicon Nanowires
2021
Nanostructures are arising as novel biosensing platforms promising to surpass current performance in terms of sensitivity, selectivity, and affordability of standard approaches. However, for several nanosensors, the material and synthesis used make the industrial transfer of such technologies complex. Silicon nanowires (NWs) are compatible with Si-based flat architecture fabrication and arise as a hopeful solution to couple their interesting physical properties and surface-to-volume ratio to an easy commercial transfer. Among all the transduction methods, fluorescent probes and sensors emerge as some of the most used approaches thanks to their easy data interpretation, measure affordability…