Escravos e libertos no Boletim Oficial de Angola(1845-1875)

O tema da escravidão em Portugal e nos territórios sobre administração portuguesa tem sido estudado por diversas áreas científicas, através de diferentes enfoques.

Escravos e libertos no Boletim Oficial de Angola (1845-1875)

Este artigo apresenta e analisa os resultados da pesquisa sobre a matéria da abolição legal da escravidão e o estatuto jurídico dos libertos, no Boletim do Governo-Geral da Provincia de Angola, mais tarde Boletim Official do Governo-geral da Provincia de Angola, entre 1845 e 1875, tentando apurar se e em que medida as normas abolicionistas e a restante legislação suplementar tiveram efectiva aplicação nas províncias ultramarinas portuguesas e, mais concretamente, em Angola, durante o século XIX. O artigo completa a I parte, publicada no segundo número da “E-Revista de Estudos Interculturais do CEI”, em que expus e analisei os resultados sobre a matéria do estatuto jurídico dos escravos e sua libertação por manumissão ou por via judicial, no mesmo periódico e em igual lapso temporal.

A paisagem espanhola nas viagens de Luciano Cordeiro

Será pela sua intensa actividade ao serviço da defesa das colónias, bem como pelas suas produções ensaísticas e de crítica literária que a posteridade lembrará Luciano Cordeiro. Já as duas narrativas de viagem – Viagens: Espanha e França (1874) e Viagens: França, Baviera, Áustria e Itália (1875) – do Fundador e da Sociedade de Geografia de Lisboa são deveras desconhecidas. Nelas se projecta a particular geografia do olhar do polígrafo português em viagem pela Europa e cuja reconstituição é o alvo deste estudo. Os objectivos perseguidos por este trabalho são, por conseguinte, a percepção e reconstrução do espaço de Luciano Cordeiro, nomeadamente da Espanha, tentando dilucidar o que na obra é de cariz geográfico, repousando sobre uma análise descritivo-realista da paisagem, e o que é de cariz literário ou ficcionado.

Antioxidant properties of hydroxycinnamic acids: a review of structure- activity relationships

Hydroxycinnamic acids (HCAs) are important phytochemicals possessing significant biological properties. Several investigators have studied in vitro antioxidant activity of HCAs in detail. In this review, we have gathered the studies focused on the structure-activity relationships (SARs) of these compounds that have used medicinal chemistry to generate more potent antioxidant molecules. Most of the reports indicated that the presence of an unsaturated bond on the side chain of HCAs is vital to their activity. The structural features that were reported to be of importance to the antioxidant activity were categorized as follows: modifications of the aromatic ring, which include alterations in the number and position of hydroxy groups and insertion of electron donating or withdrawing moieties as well as modifications of the carboxylic function that include esterification and amidation process. Furthermore, reports that have addressed the influence of physicochemical properties including redox potential, lipid solubility and dissociation constant on the antioxidant activity were also summarized. Finally, the pro-oxidant effect of HCAs in some test systems was addressed. Most of the investigations concluded that the presence of ortho-dihydroxy phenyl group (catechol moiety) is of significant importance to the antioxidant activity, while, the presence of three hydroxy groups does not necessarily improve the activity. Optimization of the structure of molecular leads is an important task of modern medicinal chemistry and its accomplishment relies on the careful assessment of SARs. SAR studies on HCAs can identify the most successful antioxidants that could be useful for management of oxidative stress-related diseases.

The utilization bound of static-priority preemptive partitioned multiprocessor scheduling is 50%

This paper studies static-priority preemptive scheduling on a multiprocessor using partitioned scheduling. We propose a new scheduling algorithm and prove that if the proposed algorithm is used and if less than 50% of the capacity is requested then all deadlines are met. It is known that for every static-priority multiprocessor scheduling algorithm, there is a task set that misses a deadline although the requested capacity is arbitrary close to 50%.

Determinant factors of turnover versus permanence of portuguese repatriates: an exploratory study

The study seeks to identify the determinant factors of the repatriate’s decision to remain or leave the company after repatriation, in a convenience sample of 40 Portuguese returnees working in companies based in Portugal. The main results were as follows: (1) there are seven factor categories: (a) salaries and benefits; (b) possibility of promotion, development, professional development; (c) organizational support (during and after the international mission) recognition of work; (d) economic and social atmosphere of the company, (e) good relationship with leadership; (f) convenience and/or personal / family well-being and; (g) external alternatives; (2) the main factors leading to permanence are (a) possibility of promotion, development and professional development and; (b) the existence of personal and family well-being / convenience; (3) the main factors leading to abandonment are (a) lack of organizational support and recognition of work performed; (b) lack of possibility of promotion, development and professional development and; (c) lack of personal / family well-being / convenience. Globally, the study suggests that the factors leading to permanence are very similar to those that lead to abandonment, although in reverse.