Sandra Maria Dias Dos Santos- PhD student
- Polytechnic Institute of Coimbra
Sandra Maria Dias Dos Santos
- PhD student
- Polytechnic Institute of Coimbra
About
25
Publications
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Introduction
Publications
Publications (25)
O dióxido de enxofre ou vulgarmente sulfuroso é um produto enológico de uso habitual nas adegas, adicionado a uvas, mostos e vinhos devido às suas propriedades: ação dissolvente, antioxidante, antidiastásica e antissética. Os limites máximos atuais de sulfuroso total, segundo o Reg. UE nº 203/2012, para os espumantes naturais biológicos são de 205...
The production of yam-derived (Dioscorea rotundata) foodstuffs is mainly performed by small and medium scale processors that employ old traditional methods. This can lead to differences in quality from processor to processor, and from location to location, with consequent safety concerns. As such, the effects of processing and post-processing phase...
Microalgae can stimulate antioxidant defense systems as adaptive responses to oxidative stress. Therefore, these organisms can be a potential source of natural antioxidants. In this work, forty-two strains of microalgae and cyanobacteria were selected within major groups held in the Coimbra Collection of Algae (ACOI). The antioxidant capacity of et...
No nosso País tem havido cada vez maior interesse na instalação de pomares de medronheiro (Arbutus unedo L.) para a produção de fruto. No mercado existem fundamentalmente plantas de origem seminal, sem qualquer processo de seleção. No âmbito deste trabalho pretende-se comparar os resultados da utilização de plantas clonais selecionadas com plantas...
No nosso País tem havido cada vez maior interesse na instalação de pomares de medronheiro (Arbutus unedo L.) para a produção de fruto. No mercado existem fundamentalmente plantas de origem seminal, sem qualquer processo de seleção. No âmbito deste trabalho pretende-se comparar os resultados da utilização de plantas clonais selecionadas com plantas...
Determination of antioxidant capacity across different taxa of microalgae.
Selection for lean meat quality has led to a decrease in total fat contents compromising on meat palatability. Preliminary studies showed higher total intramuscular fat content in autochthones Bísaro breed when compared to piglets of industrial breed. Analysis of intramuscular fatty acid profile of the semimembranosus/semitendinosus muscles showed...
Pterospartum tridentatum (L.) Willk., a Fabacea known as ‘‘prickled broom’’, (previously named Chamaespartum tridentatum) is an autochthonous plant of the Northwest part of Iberian Peninsula and Morocco. This plant is commonly found in Portuguese mountains and is locally known as ‘‘carqueja’’ or ‘‘carqueija’’. P. tridentatum grows in acidic soils,...
Pterospartum tridentatum (L.) Willk., a Fabacea known as ‘‘prickled broom’’, (previously named Chamaespartum tridentatum) is an autochthonous plant of the Northwest part of Iberian Peninsula and Morocco. This plant is commonly found in Portuguese mountains and is locally known as ‘‘carqueja’’ or ‘‘carqueija’’. P. tridentatum grows in acidic soils,...
in Apresentação de Ideias de projetos na área das Ciências Agrícolas.
A carne de suíno é a mais consumida de todas as carnes em Portugal estimando-se um consumo per capita na ordem de 42,8 kg para o ano de 2013. A raça Bísara é uma das raças autóctones de Portugal sendo a sua utilização mais marcada nas regiões Centro e Norte de Portugal. A sua pr...
Several aromatic plants, e.g. Coriandrum sativum (coentro), Petroselium sativum (salsa), Ocimum minimum (manjerico), belong to the characteristic mediterranean flora, and are accordingly employed in Portuguese gastronomy since ancient times to improve flavour and reduce the need of salt.
The major goals of this work are to improve the techonology...
Breve Descrição: A técnica Capsaroma consiste no encapsulamento de extratos de plantas em nano cápsulas de forma garantir a libertação controlada dos seus princípios ativos. Em particular, têm sido desenvolvidos extratos de Coriandrum sativum (coentro), Ocimum minimum (manjerico), Petroselium crispum (salsa) e Pterospartum tridentatum (carqueja), c...
Guedes, A. C., Gião, M. S., Seabra, R., Ferreira, A. C. S., Tamagnini, P., Moradas-Ferreira, P. and Malcata, X. (2013a). Evaluation of the Antioxidant Activity of Cell Extracts from Microalgae. Marine Drugs, 11, 1256-1270.
Guedes, A. C., Amaro, H. M., Gião, M. S. and Malcata, X. (2013b). Optimization of ABTS radical cation assay specifically for de...
The aim of this study was determine the antimicrobial activity against several bacteria and yeasts of coriander (Coriander sativum) and parsley (Petroselinum crispum) essential oils (EOs) encapsulated in β-cyclodextrin. The encapsulated EOs were individually tested against several bacteria and yeast using colorimetric broth microdilution method. Al...
Nowadays, the massive collection of spontaneous plants is becoming a problem in terms of genetic resources conservation. To preserve the Portuguese native aromatic plant species and to assess their potential use as functional foods ingredients, a comprehensive and interdisciplinary analysis is needed. Aromatic plants are highly important in the foo...
Positron annihilation lifetime spectroscopy (PALS) is used to study the free-volume in beta-cyclodextrin (CD) with the encapsulation of two different essential oils: garlic (Allium sativum) and marjoram (Origanum majorana). The data reveal the presence of a long lifetime component related to the o-Ps. It is observed that the addition of garlic (or...
The main objective of this work was to study antimicrobial activity of essential oils obtained from four aromatic plants, Coriandrum sativum (coriander), Ocimum minimum (basil), Petroselium sativum (parsley), Pterospartum tridentatum (“carqueja”) and correlate this potential with their antioxidant activity and composition. Plants used for the study...
Several aromatic plants, e.g. Coriandrum sativum (coentro), Petroselium sativum (salsa), Ocimum minimum (manjerico), belong to the characteristic mediterranean flora, and are accordingly employed in Portuguese gastronomy since ancient times to improve flavour and reduce the need of salt.
The major goals of this work are to improve the techonology o...
As demand for oil increases, production from large oil fields is declining at 4–5% annually, and the world production of oil is expected to peak around 2010. In the meantime, there is one liquid fuel that is renewable and can be used in vehicles without major modification of the engine—it is biofuel (biomass fuel). Ethanol is an alcohol-based fuel...
A Bulgarian project at Maritsa East power station demonstrated the proper transformation of air pollutants (SOx and NOx) into nitrogen fertilizer. Although this technology has not been put into practice in Bulgaria, it seems feasible on an industrial scale and so it may help to ease Portugal’s reliance on imports of nitrogen fertilizer and thereby...
Polychlorinated biphenyls (PCBs) are persistent hazardous chemicals and are now out of production worldwide. Although over 20 years have passed since the Helsinki Convention promoted the elimination of PCB use, it is difficult to put an end to PCB emissions in a short time because PCBs have a long lifetime in the environment and a major portion of...
As situações de adulteração de azeite por adição de óleos vegetais têm sofrido um aumento significativo de incidência. A presença de óleos altera o perfil do cromatograma típico dos ésteres metílicos dos ácidos gordos das amostras de azeite, podendo assim a adulteração ser detectada por cromatografia gasosa. A identificação dos lípidos adicionados...
