Time filter

Source Type

Praia, Cape Verde

The University of Cape Verde is a Cape Verdean university. The university was formed in 2006 by the merging of two colleges: ISE located in Praia ISECMAR in MindeloIn 2007 a third school officially joined the others: INIDA in São Jorge dos ÓrgãosOn January 31, 2014, three candidates ran for rector which was the first time in Cape Verdean history that a Cape Verdean university rector would be directly chosen by the student body, professors as well as by the staff. Of the three candidates that vied for the position, DR Judite do Nascimento overwhelmingly won the election, and became the first elected university rector in Cape Verdean history.The university offers 32 bachelor's degrees, 18 master's degrees, 13 associate's degrees, and one doctorate degree. It also plans to offer the first medical degree in the country in the short term .According to the international colleges and universities rankings , the University of Cape Verde is among the best universities in Africa; it proudly ranks 78th out of 100 best African universities. Wikipedia.

Ortet O.,University of Lisbon | Ortet O.,University of Cape Verde | Santos M.S.C.S.,University of Lisbon | Paiva A.P.,University of Lisbon
Separation and Purification Technology | Year: 2016

The present article focuses on the systematic investigation of the palladium(II) extraction reactions from concentrated chloride media by N,N′-dimethyl-N,N′-dicyclohexylthiodiglycolamide (DMDCHTDGA) in toluene, relying both on equilibrium and spectroscopic data. The equilibrium results collected have been cautiously assessed by the analysis of the effects caused by the variation of the extractant, hydrogen and chloride ions concentrations on the Pd(II) distribution ratio. UV-visible, 1H nuclear magnetic resonance (NMR), Fourier-transform far infrared (FIR) and Raman spectroscopic results contributed for the clarification of the Pd(II) extraction reactions by DMDCHTDGA as well. The overall information suggests that inner-sphere complexes [PdCl2·L2] (L = DMDCHTDGA) should form, with the likely co-extraction of HCl traces. The determination of the apparent molar volumes indicates that DMDCHTDGA is essentially monomeric in toluene in the concentration range tested. © 2016 Elsevier B.V.

Ortet O.,University of Lisbon | Ortet O.,University of Cape Verde | Paiva A.P.,University of Lisbon
Hydrometallurgy | Year: 2015

Two thioamide derivatives, N-methyl-N-phenyl-octanthioamide (MPHTA) and N-methyl-N-cyclohexyl-octanthioamide (MCHTA), were synthesized from their amide analogues, adequately characterized, and systematically evaluated as extractants for palladium(II) from chloride media. In sequence of previous research, which revealed the adequacy of both compounds, when dissolved in toluene, to efficiently recover Pd(II) from a wide range of differently concentrated hydrochloric acid solutions, the Pd(II) solvent extraction performance of both MPHTA and MCHTA dissolved in commercial diluents is evaluated in this work. Additionally, results obtained on successive extraction-stripping cycles, involving thiourea as stripping agent, confirm the robustness and stability of these Pd(II) solvent extraction systems, even when commercial diluents are employed. Equilibrium extraction isotherms, obtained for both compounds in toluene, show a high Pd(II) loading capacity. Selectivity data has been collected for complex 4.0 M and 6.0 M HCl mixtures containing two, three, four or five metal ions - palladium(II), platinum(IV), rhodium(III), aluminum(III), and iron(III). Fe(III) is the only metal that affects Pd(II) extraction of both MPHTA and MCHTA, as Pd(II) distribution ratios are significantly reduced; on the other hand, the other metals are practically not extracted. These selectivity results are encouraging from a practical point of view, since both extractants may prove suitable to efficiently and selectively recover Pd(II) from hydrometallurgical solutions coming from the leaching of secondary raw material sources. © 2014 Elsevier B.V. All rights reserved.

Canha N.,University of Lisbon | Canha N.,Technical University of Delft | Almeida S.M.,University of Lisbon | Freitas M.D.C.,University of Lisbon | And 5 more authors.
Atmospheric Environment | Year: 2014

A study concerning the chemical characterization of PM2.5 sampled indoors of a primary school, which burns wood for classrooms' heating, was conducted in a rural area of Portugal. A Partisol sequential sampler was placed inside of a classroom, to collect PM2.5 during the day, which corresponds to the occupied period, and during the night. The collected PM2.5 was characterized by Instrumental Neutron Activation Analysis to determine the concentration of chemical elements and by Ion Chromatography to measure Water Soluble Ions. High PM2.5 concentrations were found principally during the occupied periods (100±71μgm-3). A source apportionment study was performed by means of Positive Matrix Factorization (PMF) analysis. Results showed that four factors contributed for PM2.5 concentration whereas one factor was associated exclusively with a mixture of indoor sources: wood burning, re-suspension of soil and chalk. During classes, this indoor factor contributed for 60% of the total PM2.5 concentration. This study showed that children are exposed to high levels of PM2.5 and indicated the existence of an indoor air quality problem associated with specific indoor sources and poor ventilation. © 2014 Elsevier Ltd.

The damages caused by the millipede, Bandeirenica caboverdus constitute a major agricultural problem in Cape Verde and were the fundamental reason for the internal quarantine measures undertaken by the government in order to protect the uninfected islands. The main purpose of the present research is to find the most effective method of treatment to be implemented in the Postharvest Centre in Porto Novo, Santo Antão Island. The moderate heat and the hot water treatment were tested but not recommended because of the negative impact on the treated products or due to the elevated treatment costs. The results show that the immersion of potato, sweet potato, cassava, yam and carrot in ambient water for 20 minutes is effective and removes 100% of millipedes. After this treatment, the tested products can be commercialized free of millipedes on the other islands of the archipelago. The addition of sodium hypochlorite reduces the time of immersion to 15 minutes.

Almeida-Silva M.,University of Lisbon | Almeida S.M.,University of Lisbon | Freitas M.C.,University of Lisbon | Pio C.A.,University of Aveiro | And 2 more authors.
Journal of Toxicology and Environmental Health - Part A: Current Issues | Year: 2013

The objectives of this study were to (1) conduct an elemental characterization of airborne particles sampled in Cape Verde and (2) assess the influence of Sahara desert on local suspended particles. Particulate matter (PM10) was collected in Praia city (14°94N; 23°49W) with a low-volume sampler in order to characterize its chemical composition by k 0-INAA. The filter samples were first weighed and subsequently irradiated at the Portuguese Research Reactor. Results showed that PM 10 concentrations in Cape Verde markedly exceeded the health-based air quality standards defined by the European Union (EU), World Health Organization (WHO), and U.S. Environmental Protection Agency (EPA), in part due to the influence of Sahara dust transport. The PM10 composition was characterized essentially by high concentrations of elements originating from the soil (K, Sm, Co, Fe, Sc, Rb, Cr, Ce, and Ba) and sea (Na), and low concentrations of anthropogenic elements (As, Zn, and Sb). In addition, the high concentrations of PM measured in Cape Verde suggest that health of the population may be less affected compared with other sites where PM10 concentrations are lower but more enriched with toxic elements. © 2013 Copyright Taylor & Francis Group, LLC.

Discover hidden collaborations