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Violent transformations in Africa: coup d'etat, civil wars and terrorism in the...

Bussotti, Luca; Barros, Miguel; Jacquinet, Marc

Africa is today the main geographical area of terrorism as well as of coups d’etat. Since 2010, about 40 coups d’etat have been carried out in Africa, in parallel with an evident regression of democracy. In 2022, according to the Report on Democracy Index elaborated by The Economist Intelligence Unit, more than 35% of all countries in the world were considered authoritarian regimes, and only 14.4% were full dem...


Environmental monitoring and biomarkers of exposure to styrene in chemical indu...

Fernandes, Daniela; Meneses, Márcia; Albuquerque, Paula; Barros, Miguel

Biomarkers of exposure to chemicals, such as styrene, allow estimating the exposure to a particular compound by measuring the compound or it(s) metabolite(s) in body fluids. An example is the determination of mandelic acid and phenylglyoxylic acid in urine. Indicators of genotoxicity are categorized as: (a) DNA and protein adducts; (b) DNA strand breaks. Styrene metabolism is initiated by Cytochrome P450 enzyme...

Date: 2022   |   Origin: Saúde & Tecnologia

Exposure assessment to toluene in a chemical industry: complementarity between ...

Barros, Miguel; Viegas, Susana

Toluene is a substance commonly used in the chemical industry. It is a volatile organic chemical and workers exposure occurs frequently by inhalation. The major metabolic pathway of toluene metabolism in humans involves sidechain oxidation by the sequential action of cytochrome P-450, alcohol dehydrogenase and aldehyde dehydrogenase leading to benzoic acid which, upon conjugation with glycine, results in hippur...


Environmental monitoring and biomarkers of exposure to styrene in chemical indu...

Fernandes, Daniela; Meneses, Márcia; Albuquerque, Paula; Barros, Miguel

ABSTRACT - Biomarkers of exposure to chemicals, such as styrene, allows to estimate the exposure to a particular compound by measuring the compound or it(s) metabolite(s) in body fluids. As an example, the determination of mandelic acid and phenylglyoxylic acid in urine. Indicators of genotoxicity are categorized as: (a) DNA and protein adducts; (b) DNA strand breaks. Styrene metabolism is initiated by Cytochro...


A evolução política recente na Guiné-Bissau: as eleições presidenciais de 2005,...

Sangreman, Carlos; Sousa Jr., Fernando de; Zeverino, Guilherme; Barros, Miguel

O objectivo do conjunto de textos é contribuir para a identificação de algumas das principais razões sociais e políticas da realidade da Guiné – Bissau que foram determinantes no comportamento eleitoral que levou à eleição em 2005 de João Bernardo Vieira “Nino” para a presidência da República contra o candidato indicado e apoiado pelo PAIGC, Malam Bacai Sanhá. Procurámos aliar o conhecimento anterior do país, p...


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