Search results for "Scientific"
showing 10 items of 1193 documents
Influencia del clima motivacional en clase sobre el compromiso escolar de los adolescentes y su logro académico
2017
The scientific literature provides empirical evidence on the relationship between school engagement and numerous important variables of the adolescents’ educational context. The school engagement has been related, among other important constructs, with burnout of both teachers and students, school performance, satisfaction with the school, behavioral disruption, goal orientation and motivational climate in the classroom. Because of it, the aim of this study was to analyze the relationship between perceived motivational class climate and students’ academic achievement, with school engagement acting as a mediator. A sample of 2028 teenagers completed various instruments to measure the percept…
Il contributo dell'architettura per la ridefinizione dell'Accademia e di Brera
2013
The contribution of Architecture to the redefinition of the Brera Academy. A comparison of the sorry state of the republican education and its places with international architecture that exemplifies a different attitude towards culture such as the Openbare Bibliotheek in Amsterdam, evidencing a serious Italian short fall.The author proposes an alternative project starting with the cancellation of all the projects and competitions so far proposed in an uncoordinated manner, from the Grande Brera project to the unacceptable transfer of the Academy. Furthermore, he proposes an international com- petition for the whole Brera complex, the Pinacoteca, Academy and Observatory, that would enable st…
Boosting the methanolysis of polycarbonate by the synergy between ultrasound irradiation and task specific ionic liquids
2021
In an attempt to perform polycarbonate chemical recycling in a more sustainable way, we took into consideration the combined use of ultrasound irradiation and task specific ionic liquids. Towards this aim, the methanolysis of polycarbonate, into dimethylcarbonate and bisphenol A, was carried out in the presence of cholinium-based ionic liquids featuring anions derived from amino acids and other eco-friendly species. The target process was optimized in terms of both energy and material amounts as well as in terms of the nature of the catalysts used. The proposed protocol allowed high conversion and yields of bisphenol A to be obtained, under milder conditions compared to the ones so far repo…
The Concept of Green Analytical Chemistry
2012
Three years ago, when we published our review paper on Green Analytical Chemistry [1] it was clear that, at this time, Green Chemistry was a well established paradigm well supported by more than 50 published books, an increasing number of research teams who influenced the scientific literature and involved the editions of special journals like
Photocatalytic Processes in Membrane Reactors
2010
Conversion and degradation processes of various substrates in various types of matrices using both artificial and solar light are today very attractive by considering the scarcity and the expensiveness of the conventional energy sources. Coupling of membrane with light has shown to be very powerful and promising hybrid process, especially because a synergistic effect has been often observed. Some examples of reactions carried out to produce useful chemicals or to degrade noxious species in the framework of the green chemistry approach are reported. Fundamentals of heterogeneous photocatalysis, in general, and photocatalytic reactions in membrane reactors, in particular, are treated with a f…
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…
Closed Theories, Falsificationism and Non-Cumulative Progress
2020
It is argued that scientific progress occurs not with the cumulative growth of knowledge or when theories get closer to the truth but with discovering new domains and new theories that fit these domains. This horizontal view on the direction of scientific progress (in contrast to vertical, when we aim to get from here to the abstract and ephemeral truth) allows avoiding traditional objections posed by the incommensurability thesis and pessimistic induction, namely, that radical theory changes leave no room for progress. According to this perspective, the discovery of quantum mechanics as a new field of inquiry is a progress in itself, since this discovery had opened up a new distinctive dom…
Closer to nature: an ATP-driven bioinspired catalytic oxidation process
2013
The capability of DNA to acquire enzyme-like properties has led to the emergence of the so-called DNAzyme field; herein, we take a further leap along this nature-inspired road, demonstrating that a template assembled synthetic G-quartet (TASQ) can act as a pre-catalyst for catalytic peroxidase-mimicking oxidation reactions, whatever its nature (guanine or guanosine-based G-quartets), in an ATP-dependent manner, thereby bringing this bioinspired TASQzyme process even closer to nature.
Il disegno come immagine adeguata del reale. Ernst Haeckel, l’illustrazione scientifica e la controversia sulla riproduzione fotografica del vivente
2020
The works of Ernst Haeckel, one of the staunchest defenders of Darwin and amateur artist, brought Goethian morphology to new horizons, contributing to the affirmation of evolutionism. Overcoming the traditional disciplinary boundaries, he promoted a “biological Aesthetics”, convinced that the artistic representation of living forms is more profound and stimulating for science than any photographic reproduction. In fact, in his opinion, the scientist is a free interpreter of vital phenomena and his drawings are able of grasping the essence of biological processes. Reading some Haeckelian works, in this article we will try to clarify why the photographer has a passive view of the world, repro…
Autoría institucional de los trabajos publicados en revistas españolas de ciencias del deporte (1999-2005). (Institutional authorship of the papers p…
2009
This paper analyzes the institutional contribution of institutions to the scientific production in the area of Physical Activity and Sport Sciences through the affiliation that appears in the articles of 16 Spanish journals between 1999 and 2005. The most productive institutions and the most active authors are identified, as well as the area of origin and participating institutional sectors. Institutional plurality for each journal is also studied by means of a quotient between the number of authors and institutions. The 1786 papers analyzed engage 2280 institutions. The most productive Autonomous Communities are Andalucia (14.61% of articles), Cataluna (14.11%), and Madrid (10.97%), while …