O pensamento pedagógico de Sebastião e Silva. Escritos de Juventude

O propósito deste texto é contribuir para o conhecimento do pensamento pedagógico de Sebastião e Silva (1914-1972), considerado pela História da Matemática em Portugal o mais original e influente matemático português do século XX. Este contributo centra-se na análise contextualizada da colaboração do autor na imprensa pedagógica durante o período em que frequentou o Liceu de Évora, tendo como Focus O Corvo uma publicação da Associação Académica

Polycyclic aromatic hydrocarbons and petroleum biomarkers in Sao Sebastiao Channel, Brazil: Assessment of petroleum contamination

Polycyclic aromatic hydrocarbons (PAHs) and non-aromatic hydrocarbons (NAHs), including n-alkanes, isoprenoids and petroleum biomarkers (terpanes, hopanes, steranes and diasteranes), were quantified by gas chromatography with flame ionization and mass spectrometer detectors in sediment samples collected from the Sao Sebastiao Channel (SSC), Brazil, where the largest Brazilian maritime petroleum terminal is located The concentrations of total PAHs. total n-alkanes and petroleum biomarkers ranged from below the detection limits to 370 ng g(-1,) 28 mu g g(-1), 2200 ng g(-1) (dry weight), respectively. The analysis of PAN distribution suggested combustion sources of PAHs as the main input for these compounds with smaller amount from petroleum contamination The distribution of petroleum biomarkers undoubtedly demonstrated petroleum as a source of anthropogenic contamination throughout the region. The assessment of petrogenic sources of contamination in marine sediment is more challenging if only PAH analysis were carried out, which demonstrates that more stable hydrocarbons such as petroleum biomarkers are useful for investigating potential presence of petroleum (C) 2009 Elsevier Ltd. All rights reserved.

Petition of Isaac Da Silva for money

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Sale of ship "Farmer" to Isaac M. Gomez by Joao Jose da Silva

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Silva Fennica Vol. 1 (121). 1967.

Julkaistu Silva Fennica Vol. 2(1) -numeron liitteenä.

Silva Fennica Vol. 2. 1968.

Julkaistu Silva Fennica Vol. 3(1) -numeron liitteenä.

Silva Fennica Vol. 3. 1969.

Julkaistu Silva Fennica Vol. 4(1) -numeron liitteenä.

Silva Fennica Vol. 7, 1973.

Julkaistu Silva Fennica Vol. 8(1) -numeron liitteenä.

Silva Fennica Vol. 9, 1975.

Julkaistu Silva Fennica Vol. 9(4) -numeron liitteenä.

Silva Fennica Vol. 10, 1976.

Julkaistu Silva Fennica Vol. 10(4) -numeron liitteenä.

Silva Fennica Vol. 12, 1978.

Julkaistu Silva Fennica Vol. 12(4) -numeron liitteenä.

Silva Fennica Vol. 13, 1979.

Julkaistu Silva Fennica Vol. 13(4) -numeron liitteenä.

Silva Fennica Vol. 14, 1980.

Julkaistu Silva Fennica Vol. 14(4) -numeron liitteenä.

Silva Fennica Vol. 15, 1981.

Julkaistu Silva Fennica Vol. 15(4) -numeron liitteenä.

Silva Fennica Vol. 16, 1982.

Julkaistu Silva Fennica Vol. 17(1) -numeron liitteenä.