Search results for "MACRO"

Highly efficient temperature-dependent chiral separation with a nucleotide-based coordination polymer.

2018

We report a new chiral coordination polymer, prepared from the cytidine 5′-monophosphate (CMP) nucleotide, capable of separating efficiently (enantiomeric excess of ca. 100%) racemic mixtures of L- and D-Asp in a temperature-dependent manner. The crystal structure of the host–guest adsorbate, with the D-Asp guest molecules loaded within its channels, could be solved allowing a direct visualization of the chiral recognition process.

Photomagnetic properties of an Iron(II) low-spin complex with an unusually long-lived metastable LIESST state

2007

A comprehensive study of the photomagnetic behavior of the [Fe(L222N5)(CN)2].H2O complex has been carried out. This complex is characterized by a low-spin (LS) iron(II)-metal center up to 400 K and exhibits at 10 K the well-known Light-Induced Excited Spin State Trapping (LIESST) effect. The critical LIESST temperature (T(LIESST)) has been measured to be 105 K. The kinetics of the transition from the metastable high-spin (HS) state to the low-spin state have been determined and used for reproducing the experimental T(LIESST) curve. This study represents a second example of a fully low-spin iron(II)-metal complex up to 400 K, which can be photoexcited at low temperature with an atypical long…

Education, Growth and Development

2016

The link between higher-education investment and growth is more relevant when a country’s economy is no longer based on imitation, and begins to rely instead, on innovation as the main engine for growth. The knowledge triangle – research, education and innovation – was a core factor in European efforts to meet the Lisbon strategy and its stated objective that knowledge should help the European economy become the most dynamic knowledge-based one in the world. The failure of the Lisbon strategy was later conducive to a new ambitious scheme, namely Horizon 2020. Human capital, when transposed to educational matters, helps put forward an assessment of the relevance of the neo-Schumpeterian view…

COVID-19 y libre circulación de inversiones: un (muy) difícil matrimonio (COVID-19 and Free Movement of Investment: A (Very) Difficult Marriage)

2020

Spanish Abstract: Las inversiones extranjeras estan siendo objeto de una aproximacion mas cautelosa y critica en los ultimos anos en gran numero de paises. Una posicion que se refleja en su regimen juridico y se manifiesta, entre otros extremos, en el diseno de mecanismos de control previo con base en su eventual contrariedad con la seguridad nacional del pais receptor. La pandemia del COVID-19 no ha hecho sino acentuar esta tendencia. La posicion mantenida por la UE al respecto, y la suspension de la libre circulacion de inversiones decidida por el Gobierno espanol son manifestaciones de ello que, todo apunta, han venido para perdurar. English Abstract: In recent years, foreign investment …

Corruptos y gloriosos / 2

2008

Aproximación a la Geografía del despilfarro en España: balance de las últimas dos décadas

2018

Este trabajo pretende ser una primera aproximación a la dimensión del despilfarro de recursos públicos en infraestructuras en España desde 1995 hasta la actualidad en los distintos niveles de gobierno. A partir de algunas precisiones sobre los conceptos de despilfarro y corrupción, se analiza, de una parte, la inversión y los sobrecostes en infraestructuras innecesarias impulsadas y ejecutadas por la Administración General del Estado en el ámbito de sus competencias, y de otra, infraestructuras, proyectos, eventos e inversiones fallidas, vacías o infrautilizadas acometidas por las Comunidades Autónomas y los gobiernos locales. Se abordan los déficit de marco institucional y de gobernanza te…

Economic analysis of PV systems on buildings in Sicilian farms

2013

Abstract The photovoltaic sector in Italy in recent years has experienced a rapid growth also in the primary sector, thanks to substantial incentives guaranteed by energy policies, simultaneous reduction of investment costs and tax benefits. In order to better understand the growth of the PV industry in Italian primary sector, the aim of this paper has been to evaluate the economic convenience of four PV systems on farm buildings located in four different farms of the north-western coast of Sicily and realized during the second and fourth Italian feed-in schemes. For each feed-in scheme it has been considered a PV plant that sells the electricity to the grid and another in which the energy …

Amphiphilic poly(hydroxyethylaspartamide) derivative-based micelles as drug delivery systems for ferulic acid

2008

Self-assembling micelles, potentially useful as drug delivery systems for ferulic acid (FA), were obtained in aqueous media from amphiphilic alpha,beta-poly(N-2-hydroxyethyl)-dl-aspartamide (PHEA) copolymers bearing at the polyamino acidic backbone both poly(ethyleneglycol) (2000 or 5000 Da) and hexadecylamine (C(16)) moieties, at a concentration of 7 x 10(- 3) and 4 x 10(- 3) g/l, respectively, with nanometre size and negative zeta potential. These micelles were able to entrap FA and to release it in a prolonged way in phosphate buffer solution at pH 7.4 and human plasma. These systems were also stable in storage conditions and have no cytotoxic effects on Caco-2, 16 HBE, HuDe and K562 cel…

The Tax Returns of Public Spending on Universities: An Estimate with Monte Carlo Simulations

2015

Pastor J. M. and Peraita C. The tax returns of public spending on universities: an estimate with Monte Carlo simulations, Regional Studies. This paper proposes a methodology based on counterfactual scenarios and the existence of uncertainty to estimate the tax returns of public spending of regional governments on their public universities. The introduction of differences in the time spent by the students at university and the proportion of the total public expenditure implies making assumptions about uncertainty. The paper applies Monte Carlo simulations incorporating stochastic elements to estimate the tax returns of public spending in the University of the Basque Country (Spain). The resu…

Synthèse de ligands macrocycliques comportant des fragments aromatiques et leur application pour la détection des cations métalliques

2011

The PhD thesis deals with the synthesis of polyazaligands using Pd-catalyzed amination of aryl halides. The manuscript consists of two parts. In the first part the scope of the Pd-catalyzed amination reaction for the synthesis of polyazamacrocyclic ligands is studied. The Pd-catalyzed amination of 2,7-dibromonaphthalene, 3,3’-dibromobiphenyl and 6,6’-dibromo-2,2’-bipyridyl with linear polyamines and oxadiamines is thoroughly investigated, and corresponding nitrogen- and oxygen-containing macrocycles is synthesized in yields up to 45%. The dependence of the formation of macrocycles and cyclic oligomers on the nature of the starting compounds is established. Two alternative approaches to cycl…