Search results for "D1"

Formation of Si/SiO2 Luminescent Quantum Dots From Mesoporous Silicon by Sodium Tetraborate/Citric Acid Oxidation Treatment

2019

We propose a rapid, one-pot method to generate photoluminescent (PL) mesoporous silicon nanoparticles (PSiNPs). Typically, mesoporous silicon (meso-PSi) films, obtained by electrochemical etching of monocrystalline silicon substrates, do not display strong PL because the silicon nanocrystals (nc-Si) in the skeleton are generally too large to display quantum confinement effects. Here we describe an improved approach to form photoluminescent PSiNPs from meso-PSi by partial oxidation in aqueous sodium borate (borax) solutions. The borax solution acts to simultaneously oxidize the nc-Si surface and to partially dissolve the oxide product. This results in reduction of the size of the nc-Si core …

On the Choice of the Extracellular Vesicles for Therapeutic Purposes

2019

Extracellular vesicles (EVs) are lipid membrane vesicles released by all human cells and are widely recognized to be involved in many cellular processes, both in physiological and pathological conditions. They are mediators of cell-cell communication, at both paracrine and systemic levels, and therefore they are active players in cell differentiation, tissue homeostasis, and organ remodeling. Due to their ability to serve as a cargo for proteins, lipids, and nucleic acids, which often reflects the cellular source, they should be considered the future of the natural nanodelivery of bio-compounds. To date, natural nanovesicles, such as exosomes, have been shown to represent a source of diseas…

Protein tyrosine nitration and thiol oxidation by peroxynitrite-strategies to prevent these oxidative modifications.

2013

The reaction product of nitric oxide and superoxide, peroxynitrite, is a potent biological oxidant. The most important oxidative protein modifications described for peroxynitrite are cysteine-thiol oxidation and tyrosine nitration. We have previously demonstrated that intrinsic heme-thiolate (P450)-dependent enzymatic catalysis increases the nitration of tyrosine 430 in prostacyclin synthase and results in loss of activity which contributes to endothelial dysfunction. We here report the sensitive peroxynitrite-dependent nitration of an over-expressed and partially purified human prostacyclin synthase (3.3 μM) with an EC50 value of 5 μM. Microsomal thiols in these preparations effectively co…

Identification and enrichment of thyroid stem cells in anaplastic cell lines

2008

The conflicting historical issues and their school approach: a Spanish example

2017

En este estudio se analiza la forma en que los “tiempos difíciles” de la reciente historia española (la Guerra Civil y la dictadura franquista, 1936-1975) han sido tratados tanto en los manuales escolares de historia como en el interior de las aulas, estableciendo, por una parte, los avances historiográficos y didácticos conseguidos y, por otra, las actuales insuficiencias y deficiencias de tales planteamientos desde la perspectiva de un tratamiento realmente democrático y reconciliatorio de los mismos. Los avances han sido muy lentos, tanto en las representaciones sociales del conjunto de la sociedad española como en su presentación escolar. Todo ello permite afirmar que esta cuestión sigu…

Information, Communications and Media Technologies for Sustainability: Constructing Data-Driven Policy Narratives

2021

This paper introduces the idea of data-driven narratives to examine how the use of information, communications, and media technologies (ICMTs) impacts the sustainable growth of economies. While ICMTs have regularly been advocated as a policy tool for growth and development, there is a research gap in empirical studies validating how such policies may be effective. This analysis is based on historical panel data from 39 economies across the developed North (19) and developing South (20). The industry-standard Cross-Industry Standard Process for Data Mining (CRISP-DM) methodology was applied to construct narratives that weave extant theories with empirical data. The art of developing data-dri…

Configurational theory in traditional manufacturing industries: a new model of high-performing small and medium-sized enterprises

2020

The goal of this study is to provide a model of high-performing small and medium-sized companies to address the new environmental challenges in traditional manufacturing industries. Adopting a configurational logic and following an inductive approach based on four high-performing firms, this paper provides new empirical evidence on how the steps followed by these firms are adjusted to the high-performance models prescribed by the literature. In doing so, it also offers a dynamic view of the interrelationships between the strategy and the new conditions of the environment. At a practitioner level, the paper illustrates which recipes are more appropriate to prescribe recommendations for a mor…

Autor y lector en la traducción catalana del Decamerón de Boccaccio: análisis de una asimilación

2013

Resumen: Ese trabajo analiza la traduccion catalana del Decameron de 1429 centrandose en las particularidades de la narrativa, especialmente la relacion entre el autor y el lector. Sin dejar de lado aspectos propios de la traduccion en aquel momento, se enfatiza el valor de este texto, en ocasiones considerado una mera adaptacion, como una obra humanistica, un documento de la asimilacion del humanismo italiano en la Corona de Aragon. El texto catalan es una muestra de como se entendieron las ideas narrativas del autor italiano, pues muchos de los que se han considerado defectos en la obra responden a estrategias narrativas en funcion de un determinado publico y una determinada cultura. Se t…

La Llegenda del llibreter assassí de Barcelona. Tradizione e traduzione. Note al margine dell’edizione italiana

2013

Riassunto: La recente pubblicazione in Italia della traduzione de La llegenda del llibreter assassi di Ramon Miquel i Planas offre lo spunto per un confronto con alcune precedenti traduzioni in castigliano e per una breve riflessione di metodo sulla traduzione. Le due versioni spagnole (1991 e 2011) si configurano infatti, a differenza di quella italiana, come libere rielaborazioni dell’originale dal momento che ne alterano la struttura, trasformando il testo e piegandolo a nuove finalita. L’elemento di interesse di questa «manipolazione» risiede nel fatto che essa e in qualche modo autorizzata dalla stessa natura miscellanea dell’opera di Miquel i Planas, al contempo libro erudito e antolo…

Incerta glòria di Joan Sales tra filologia, storia e traduzione

2015

Riassunto: In questo saggio si fa una riflessione sull’opera di Joan Sales Incerta glòria e particolarmente si vede le conessione tra filologia, storia e traduzione.Parole chiave: Joan Sales, Incerta gloria, traduzione, storia, filologiaAbstract: This article makes a reflection on the work of Joan Sales, Incerta glòria, and it particularly affects the connection between philology, history and translation.Keywords: Joan Sales, Incerta gloria, philology, history translation