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Conservação de castanha por irradiação

Bento, Albino; Antonio, Amilcar L.; Ramalhosa, Elsa; Ferreira, Isabel C.F.R.; Carocho, Márcio

A irradiação de alimentos é um processo industrial utilizado para diversos fins: esterilização, desinfestação ou para aumentar o tempo de prateleira dos produtos. Na castanha este processo surgiu como uma necessidade após a proibição (Março de 2010) da utilização de brometo de metilo na fumigação pós-colheita para eliminação dos insectos nas castanhas destinadas à exportação. Os efeitos da irradiação nos parâme...

Data: 2013   |   Origem: Biblioteca Digital do IPB

Application of response surface methodology for obtaining lettuce (Lactuca sati...

Gomes, Teresa; Delgado, Teresa; Ferreira, Anabela; Pereira, J.A.; Baptista, Paula; Casal, Susana; Ramalhosa, Elsa

The main objective of the present work was to optimize the extraction conditions for simultaneous maximization of total reducing (TRC) and antioxidant (AC) capacities for lettuce (Lactuca sativa L.) by-products extracts, using response surface methodology. For this, a design of experiments (DOE) with different combinations of solvents (water, methanol and acetone) extraction temperatures (30–60 ◦C) and time (10...

Data: 2013   |   Origem: Biblioteca Digital do IPB

Phenolic composition and antioxidant potential of Vitis vinífera leaves of six ...

Ramalhosa, Elsa; Valentão, P.; Andrade, P.B.; Andrade, João Verdial; Bento, Albino; Pereira, J.A.

In the present work it was intended to study the phenolic composition and antioxidant potential of Vitis vinifera leaves of six varieties: white – Carrega Branco, Chardonnay and Viosinho, and red – Bastardo, Tinta Gorda and Touriga Francesa. All varieties were harvested in the NE of Portugal (Trás-os-Montes region). The phenolic composition of aqueous extracts was determined by HPLC-DAD and the antioxidant pote...

Data: 2013   |   Origem: Biblioteca Digital do IPB

Metal contents in honey and mushrooms from serpentine soils in the Morais site

Ramalhosa, Elsa; Magalhães, Marta; Afonso, Maria João A.P.S.; Plasencia, Paula; Saraiva, Daniel; Azevedo, João; Castro, Marina

Morais site, located in the northeast of Portugal, is known by its geology because it is one of the most representative areas of ultramafic rocks. This kind of soils has particular chemical characteristics, such as high levels of some heavy metals, namely chromium (Cr) and nickel (Ni). However, in Morais site several non-wood forest products (NWFP) are collected by the local community, and, so, it is of great i...

Data: 2013   |   Origem: Biblioteca Digital do IPB

É possível inovar e valorizar produtos e sub-produtos de origem vegetal tradici...

Ramalhosa, Elsa; Delgado, Teresa; Fernandes, Luana; Silva, Ana Cândida; Rodrigues, Nuno; Gomes, Teresa; Pereira, Ermelinda; Bento, Albino; Casal, Susana

A Escola Superior Agrária do Instituto Politécnico de Bragança (Portugal) tem desenvolvido e participado em projetos relacionados com a valorização de produtos e sub-produtos de origem vegetal, tais como o projeto “AGRINNDIF - Mejora de la competitividad del sector agrario de Castilla y León y Norte de Portugal através de la innovación y el desarrollo de productos diferenciados de alto valor”, financiado pelo P...

Data: 2013   |   Origem: Biblioteca Digital do IPB

Gamma irradiation preservation of chestnut fruits: effects on color and texture

Antonio, Amilcar L.; Fernandes, Ângela; Bento, Albino; Ferreira, Armando; Trigo, M. João; Botelho, M. Luísa; Quintana, Begoña; Ramalhosa, Elsa

Chestnuts are a seasonal fruit that must be postharvest treated to meet food safety regulations. In this study the effect of gamma irradiation on color and texture of chestnut fruits from a European variety (Castanea sativa Miller) was reported. The fruits were subjected to gamma irradiation doses of 0.5, 3 and 6 kGy, with color and texture properties analyzed along a typical commercial period for this fruit af...

Data: 2013   |   Origem: Biblioteca Digital do IPB

Espresso coffee residues in horticultural improvement

Cruz, Rebeca; Morais, Simone; Mendes, Eulália; Pereira, J.A.; Baptista, Paula; Ramalhosa, Elsa; Casal, Susana

Spent coffee grounds are usually disposed as common garbage, without specific reuse strategies. Due to its recognized richness in bioactive compounds, the effect of espresso spent coffee grounds on lettuce´s macro- and micro- elements, as well as on its antioxidant and bioactive compounds, was assessed in order to ascertain its potential applicability in agroindustry, minimizing environmental issues and increas...

Data: 2013   |   Origem: Biblioteca Digital do IPB

Pine nuts authenticity in the Portuguese market

Santos, Carla; Porfírio, Bruno; Silva, Anaísa; Faria, Miguel; Cruz, Rebeca; Ramalhosa, Elsa; Pereira, J.A.; Cunha, Sara; Casal, Susana

Pine nuts, the edible seed of the pine tree (Pinus spp.) are a valuable commodity in the international market, with Portugal attaining the fourth position with the exclusive production of Pinus pinea. Pine nuts from different pine species differ in size, nutritional value, taste and therefore commercial values, making it necessary to grant their authenticity. Following recent reports on pine nut mislabelling in...

Data: 2013   |   Origem: Biblioteca Digital do IPB

Effect of fresh and composted espresso spent coffee on soil and Lactuca sativa ...

Gomes, Teresa; Cruz, Rebeca; Pereira, J.A.; Ramalhosa, Elsa; Casal, Susana; Baptista, Paula

Espresso spent coffee grounds (ESC) comprises solid residues obtained after espresso coffee preparation, which are massively generated worldwide, being unfortunately disposed together with common garbage. Still, there are several references about its application as organic fertilizer in domestic cultivation, due to their richness on mineral compounds, especially potassium. However, their effect or safety on agr...

Data: 2013   |   Origem: Biblioteca Digital do IPB

Retardation in seed germination and induction of oxidative stress in lettuce pl...

Gomes, Teresa; Pereira, J.A.; Ramalhosa, Elsa; Casal, Susana; Baptista, Paula

Over the past years, several strategies have been tentatively applied to reuse spent coffee grounds (SCG). This residue, obtained after the brewing process, has a global production around 6 million tons per year. The use of SCG in domestic agriculture is an increasing popular practice. However, scientific evidences about their effect on plants remain unknown. Caffeine present in SCG (about 0.2%) together with t...

Data: 2013   |   Origem: Biblioteca Digital do IPB

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    Financiadores do RCAAP

Fundação para a Ciência e a Tecnologia Universidade do Minho   Governo Português Ministério da Educação e Ciência Programa Operacional da Sociedade do Conhecimento União Europeia