Cp2TiCl/D2O/Mn, a formidable reagent for the deuteration of organic compounds

Cp2TiCl/D2O/Mn is an efficient combination, sustainable and cheap reagent that mediates the D-atom transfer from D2O to different functional groups and can contribute to the synthesis of new deuterated organic compounds under friendly experimental conditions and with great economic advantages.The Spanish MICINN (Project CTQ2015-70724-R)University of Sevill

Cp2TiCl/D2O/Mn, a formidable reagent for the deuteration of organic compounds

Cp2TiCl/D2O/Mn is an efficient combination, sustainable and cheap reagent that mediates the D-atom transfer from D2O to different functional groups and can contribute to the synthesis of new deuterated organic compounds under friendly experimental conditions and with great economic advantages.The Spanish MICINN (Project CTQ2015-70724-R)University of Sevill

Divorce risk factors and their variation over time in Spain

The aim of this article is to analyse the determinants of marriage dissolution in Spain and their variation over time for women married between 1949 and 2006. Data are drawn from the Survey of Fertility, Family and Values of 2006. The article analyses the transition from first marriage to marital dissolution for couples who married in two eras: one prior to the Divorce Law of 1981, during which social and legal barriers to dissolution were many, and one in the period after the law was introduced, during which barriers to marriage dissolution were far fewer. Analyses are conducted using a continuous time event history model. The results indicate some similarities between Spain and other countries, such as the positive relationship between the typical features of unconventional families and marital dissolution, but also some specific differences, such as an increase in the importance of premarital pregnancy and/or not having children. It is also important to stress the declining importance of socio-economic variables, such as education and the labour market situation of women.age heterogamy, children and divorce, divorce, education and divorce, event history analysis, parental divorce, premarital children, premarital cohabitation, premarital pregnancy, separation

Energy transfer between colloids via critical interactions

We report the observation of a temperature-controlled synchronization of two Brownian-particles in a binary mixture close to the critical point of the demixing transition. The two beads are trapped by two optical tweezers whose distance is periodically modulated. We notice that the motion synchronization of the two beads appears when the critical temperature is approached. In contrast, when the fluid is far from its critical temperature, the displacements of the two beads are uncorrelated. Small changes in temperature can radically change the global dynamics of the system. We show that the synchronisation is induced by the critical Casimir forces. Finally, we present the measure of the energy transfers inside the system produced by the critical interaction.Comment: 8 pages, 7 figure

Non-standard negation in modern English: a corpus-based study of four salient features

El sistema de polaridad negativa en inglés ha sido objeto de amplio estudio en las últimas décadas. La mayoría de los lingüistas han prestado atención a una serie de fenómenos dentro de este sistema que no observan lo que se considera la regla general. En este artículo me centraré en cuatro aspectos de la negación que no siguen las normas estándar y que cada vez son más frecuentes en el lenguaje utilizado por los hablantes nativos de inglés: la forma verbal negativa ain’t, la coletilla invariable innit, la negación múltiple y el uso del adverbio never como forma negativa de pasado.Para el análisis de estas formas negativas, me referiré, en primer lugar, a su tratamiento en las principales gramáticas del inglés de referencia y, luego, a los resultados del análisis de datos extraídos de varios corpus y de otras fuentes. En la sección final se hacen una serie de consideraciones sobre las implicaciones de todo lo anterior para la enseñanza de este punto gramatical en el ámbito universitario.Negative polarity in English has been extensively studied in the last decades. Most grammarians draw our attention to a number of phenomena within this system that do not conform to what is regarded as the general rule. In this paper I will focus on four main features of negation which precisely do not follow the standard but which are becoming more and more frequent in the language of native speakers of English: the negative verbal form ain’t, the invariable question tag innit, negative concord and the use of the negative adverb never as a past time negator.For the discussion of these negative features, I will refer to the accounts provided by the modem descriptive grammars as well as to the analysis of data extracted from several corpora and other sources. Some reflections are made in the final part on the implications that all this may have for the actual teaching of this area at the university level

Derecho y políticas ambientales en La Rioja

Derecho y políticas ambientales en La Rioj

Implantes cocleares ¿es posibles que los sordos oigan?

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