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showing 10 items of 267 documents
La amistad y el amor en el epistolario de Séneca
2008
Joaquin.Beltran@uv.es El motivo por el que nos hemos decidido a estudiar en un mismo trabajo la amistad y el amor no es otro que histórico, por la conocida ambigüedad en la que se movían los primitivos filósofos griegos y, además, para llegar a saber la posición concreta de Séneca. Ello nos ha llevado a intentar codificar su pensamiento sobre la amistad y el amor en relación, sobre todo, con Aristóteles y Cicerón. Así, hemos intentado demostrar que Séneca ha unido a los conceptos de amistad e incluso amor otras ideas nuevas, que le dan un aire diferente, como la de solidaridad, asociación o sociedad, y que nos inducen a pensar en una definición afirmativa y muy positiva de la amistad frente…
Front Cover: Glucose as an Eco‐Friendly Reductant in a One‐Pot Synthesis of 2,3‐Dihydroquinazolin‐4(1 H )‐ones (Eur. J. Org. Chem. 41/2020)
2020
An environmentally friendly (“green”) reversed-phase liquid chromatography method for UV filters determination in cosmetics
2005
Abstract A green procedure based on reversed-phase liquid chromatography with gradient elution using environmentally friendly solvents, has been developed to determine 18 UV filters, which are most used in Europe nowadays as sunscreen in cosmetics. Samples were weighed and dissolved in ethanol. Two aliquots were taken from the initial sample solution to prepare two solutions, so analytes could be determined chromatographically in two groups (the most fat-soluble and the easily water-soluble ones) using a different gradient elution program for each group. The mobile phases were based on mixtures of ethanol and 1% acetic acid or 1% sodium acetate buffer pH 4.75. The same C18 stationary phase …
Green Design of Novel Starch-Based Packaging Materials Sustaining Human and Environmental Health
2021
A critical overview of current approaches to the development of starch-containing packaging, integrating the principles of green chemistry (GC), green technology (GT) and green nanotechnology (GN) with those of green packaging (GP) to produce materials important for both us and the planet is given. First, as a relationship between GP and GC, the benefits of natural bioactive compounds are analyzed and the state-of-the-art is updated in terms of the starch packaging incorporating green chemicals that normally help us to maintain health, are environmentally friendly and are obtained via GC. Newer approaches are identified, such as the incorporation of vitamins or minerals into films and coati…
Green Spectroscopy: A Scientometric Picture
2009
ABSTRACT The state of the art of green spectroscopy, as a sustainable and friendly alternative to the classical spectrometric methods of analysis, has been established from the evaluation of the scientific literature published about this topic in the frame of the so-called Green Chemistry paradigm. Special attention has been paid to the fact that keywords like Green Analytical Chemistry, environmentally friendly, or clean analytical method or sustainable analytical chemistry are far from being commonly used in analytical studies. In spite of this fact there are numerous studies that provide direct analytical methodologies, or a reduction of reagents consumption or waste generation, the recy…
Hazards That Can Affect CNC Machine Tools during Operation—An AHP Approach
2020
CNC (computer numerically controlled) machine tools are highly advanced technological systems, used to machine parts by means of metal cutting processes. Their structure and kinematics are very complex, involving accurate coordinated motions on three to five axes. Operating CNC machine tools is a complicated process, which can easily be affected by errors. Nowadays, safety systems and devices are developed in order to make this process safer and more user friendly. Modern CNC controllers are designed to deal with obvious sources of hazards, such as overloads (by means of various sensor systems) and collisions (by checking the NC code syntax and simulating it on the machine). However, despit…
Life Satisfaction and Psychological Distress of African Immigrants in Italy and Spain: the protective role of social support and sense of community
2021
This article analyzes whether migrants’ distress factors are reduced, and life satisfaction increased by the sense of community and support from friendship or family networks, with age and length of residence serving as co-variables. Host country, gender, migration (economic/non-economic), employment (employed/unemployed) and legal status (regulated/unregulated) were all treated as moderating variables. We tested this theoretical model in two samples of African immigrants residing in Palermo (Italy) and Malaga (Spain), confirming the predictive capacity of the independent variables. Interesting results emerged relating to the effects of length of residence, employment status and support fro…
Facilitators and barriers HPV unvaccinated girls after 5 years of program implementation
2014
Understanding perceptions and characteristics of human papillomavirus (HPV) vaccinated and non-vaccinated girls can inform communication activities and vaccine delivery strategies. The purpose of this study was to evaluate knowledge and factors associated with HPV unvaccinated girls after five years of vaccination program implementation in Sicily, an Italian region with low vaccination coverage (<50.0%). A cross-sectional study was conducted through a questionnaire designed to assess knowledge and vaccination status of girls of 1997, 1998, 1999, and 2000 birth cohorts. The sample consisted of 350 girls who attended three high schools. Multivariable logistic regression analysis was conducted…
Traducción, cultura y política en el mundo hispánico del siglo XVIII: reescribir las Lettres d'une péruvienne de Françoise de Graffigny
2014
Este artículo narra la historia de cómo se reescribió en la España peninsular una obra fundamental de la Ilustración francesa, las Lettres d’une péruvienne (1747) de Françoise de Graffigny, en un proceso tejido de conexiones personales y culturales –amistosas, clientelares, de afinidad o rivalidad intelectual y literaria– entre las dos orillas del mundo hispánico. Se pretende enriquecer el mero análisis textual de la traducción castellana firmada por María Rosario Romero en 1792, reconstruyendo el perfil biográfico de su traductora y el contexto político e intelectual en el que fue gestada y se insertó. De ese modo, emerge una trama de relaciones en las que se destacan ciertas figuras (M. R…
Sobre la filosofia de l’humanista valencià Joan Serra al De contemplatione amicicie. Notes a una traducció catalana
2013
Resum: Presentem la traducció catalana del De contemplatione amicicie, escrit per l’humanista valenciàJoan Serra l’any 1454. La traducció parteix de l’edició curada per Evencio Beltran de l’únic manuscritconegut: BNF ms Nat. lat. 8756. La translació s’acompanya d’una introducció historicofilosòficaarticulada al voltant de l’analogia fonamental de l’obra, a saber, la concòrdia absoluta de dos amicsés com la unió perfecta del cos i de l’ànima humana. S’hi analitzen les fonts fonamentals: Cicerói Pseudo-Agustí, i s’hi constata l’organització dual dels continguts del text, en tant que dedica elscapítols senars a la consideració de la unió del cos i l’ànima segons la filosofia natural, mentre qu…