A Catálise no Brasil nos últimos 25 anos: uma história de sucesso

In the last 25 years the research in catalysis has passed from heterogeneous processes mainly applied to petrochemical industries to homogeneous processes applied to fine chemicals and green chemistry. In this context the Brazilian Chemical Society (SBQ) is playing an important role in the organization of this interdisciplinary area involving researches from different fields of physical sciences.

Maria de Portugal, una dona amagada per la història

The points of departure of this article are our own researches which talked about Maria of Portugal and widowhood during the 14ht century, respectively. We were interested in the figure of Maria of Portugal as example of all that kind of people, mostly women but also children who were treated as change currency by their relatives. They were used to guaranty peace treaties and other agreements, but also as hostages in war times. This article is based on the study of Maria's will, which is preserved in the Arxiu de la Coroan d'Aaragó. however we also thought necessary to present the figure of Maria of Portugal in order to grasp, not only the events that marked her life, but also the way they influenced in her thoughts an feelings.

Andorra, història, documentació i arqueologia. Recerca en Època Medieval, dels darrers 30 anys.

Aquest treball de final de grau és una explicació sobre la historiografia del Principat d’Andorra, un petit país dels Pirineus Centrals, entre Espanya i França. La història, l’arqueologia i els reculls documentals que daten d’època medieval, seran l’objecte d’estudi. En aquesta època es posen els fonaments essencials per desenvolupar-se, en un futur com a un Estat. Tot ve configurat per uns pactes del 1278 i del 1288 entre els 2 cosenyors que desenvolupa la seva jurisprudència, la seva activitat econòmica, social i política, converteix els costums i la tradició en els seus valors elementals i es desenvolupa la seva vida quotidiana. I sobre aquestes disciplines s’han fet moltes interpretacions en els últims 30 anys. Saber quin és el seu objectiu, ja sigui per arribar al fet que tots els Andorrans coneguin la seva pròpia historia ,amb la iniciativa de l’Escola Andorrana en els anys 80; o per cercar una base històrica a la naturalesa jurídica i política de les Valls. També explicarem quines són les carències i quines són les recerques més abundants o predominants.

La història contemporà nia de la llengua catalana com a paradoxa

En aquest article ens proposem demostrar que la història del català del segle XVI ençà està caracteritzada per tres fenòmens sense els quals no podem entendre tampoc la situació actual: reculada en els usos socials de la llengua, baixa cohesió de la comunitat lingüística, i augment de la variació interna i les interferències. Aquestes tres constants, però, s'han corregit en part des de finals del XIX, segons l'àmbit i el territori. Al nostre parer, allò que singularitza el català entre les llengües europees és aquesta combinació paradoxal de reculades i recuperacions durant l'edat contemporània. This paper aims to demonstrate that the history of Catalan from the 16th century onwards is characterized by three phenomena without which the current situation of this language cannot be understood. These three phenomena are regression in social practices, low cohesion of the language community and increase of its internal variation as well as interferences. Nevertheless, those phenomena have been partially mitigated from the late 19th century depending on the domain and area concerned. In our view, what singles out Catalan among all European languages is this paradoxical combination of setbacks and recoveries in the late modern age.

Marcos da história da radioatividade e tendências atuais

The first days of radioactivity, the discoveries of X-rays, radioactivity, of alpha- and beta- particles and gamma- radiation, of new radioactive elements, of artificial radioactivity, the neutron and positron and nuclear fission are reviewed as well as several adverse historical marks, such as the Manhattan project and some nuclear and radiological accidents. Nuclear energy generation in Brazil and the world, as an alternative to minimize environmental problems, is discussed, as are the medicinal, industrial and food applications of ionizing radiation. The text leads the reader to reflect on the subject and to consider its various aspects with scientific and technological maturity.

DUODES: Paraules clau d'història de les dones a Catalunya, segles IX-XVIII: una proposta de tesaurus

Sobre una proposta de tesaurus amb les paraules clau d'història de les dones de Catalunya dels segles IX a XVIII, realitzat per les dones de les seccions d'Història Medieval i Moderna del Centre d'lnvestigació Històrica de la Dona de la Universitat de Barcelona (DUODA)

DUODES: Paraules clau d'història de les dones a Catalunya, segles IX-XVIII: una proposta de tesaurus : configuración general

Sobre la configuració general d'una proposta de tesaurus amb les paraules clau d'història de les dones de Catalunya dels segles IX a XVIII, realitzat per les dones de les seccions d'Història Medieval i Moderna del Centre d'lnvestigació Històrica de la Dona de la Universitat de Barcelona (DUODA)

Baixem de les tarimes i connectem: recerca en història medieval i innovació docent

We would like to introduce our group of research, [CONTRA TAEDIUM], created by professionals from different fields, that have contributed in this article. Our purpose is to expose our reflections based on our own experiences, not only in research, but also in teaching. We propose new forms of writing history in order to understand the dairy life of the women and men of the past, from birth to death. We would like to point out that interacting all types of sources is essential to understand our history. But, what really makes sense is to bring our students in the historical methodology and involve them in their education. Moreover, it is necessary to design new teaching materials using the new technologies, although it requires team-work and a great, but satisfying, effort

70º aniversário do biodiesel em 2007: evolução histórica e situação atual no brasil

Periodically, during petroleum shortages, vegetable oils and their derivatives have been proposed as alternatives to petroleum diesel fuel. Different approaches have been proposed, including the use of pure vegetable oils (or blends) or their derivatives. Indeed, the use of fatty-acid methyl or ethyl esters (usually known as "biodiesel") produced by alcoholysis of triacylglycerides or esterification of fatty acids was initially proposed in Belgium 70 years ago, when the first world patent was deposited. Recently, foreign dependence on diesel fuel and the petroleum crisis have increased the discussion in Brazil on starting to use alternatives to diesel fuel, being biodiesel the alternative of choice for a large petroleum diesel substitution program.

Són els símptomes de la fibromià lgia la histèria del segle XXI?

Nowadays, fribromialgya is one of the nervous diseases with the highest comorbidity and chronic index. The peculiarity of this symptomatology is becausephysiological pain goes to different parts of the body. The symptomatology of fribromialgya and hysteria could have relation between them and even, sharing many similar simptoms. Therefore, we will focus on studyng two cases to resolve these questions and we will be able to see if fibromialgya has histerical symptoms.

Les TIC aplicades a la història de la infermeria

La cerca d'informació i el pensament crític són competències transversals que es consideren bàsiques per als estudiants universitaris. Aquestes dues competències s'han pogut desenvolupar en el marc d'una activitat denominada cerca i lectura crítica de documents històrics, que es va incloure dins dels crèdits pràctics de l'assignatura Història de la Professió. Les tasques consistien a fer una cerca bibliogràfica a través de les bases de dades més habituals per la Infermeria, obtenir un document històric, fer-ne una lectura crítica i confeccionar un informe escrit. Presentem l'activitat que es va oferir a tots els alumnes de segon semestre d'Infermeria (grups M6 T6), la seva metodologia i els resultats de la seva implementació, que mostren un grau molt elevat de satisfacció en l'alumnat i la seva utilitat en el foment de la lectura crítica.

Cardiac disease in systemic lupus erythematosus: prospective study of 70 patients.

A prospective two dimensional and Doppler echocardiographic study of 70 consecutive patients with systemic lupus erythematosus (SLE) and 40 controls was carried out. Forty patients (57%) were found to have echocardiographic disturbance. Valvular abnormalities were detected in 31 patients (44%) and in only two controls (5%). Mitral valve abnormalities were the most common findings (23/70 (33%)) with mild or moderate regurgitation the most frequent lesion (16% and 9% respectively). Three patients (4%) had a morphological echocardiographic pattern suggestive of non-infective verrucous vegetations affecting the mitral valve. No patient had haemodynamically significant clinical valve disease. Pericardial effusion was identified in 19 patients (27%), of whom 14 had mild and clinically silent disease. Myocardial abnormalities were found in 14 patients (20%), but clinical features of myocardial dysfunction were present in only one. Patients with antiphospholipid antibodies were found to have an increased prevalence of endocardial lesions, mainly valvular regurgitation. It is concluded that the inclusion of echocardiography in a study protocol of patients with SLE can identify an important subset of patients with cardiac abnormalities, many of which are clinically silent. In addition, the association of antiphospholipid antibodies with endocardial lesions suggests that these antibodies may have a prominent role in the pathogenetic mechanisms of heart valve disease in SLE.