Recursos de colección

Repositório do Instituto Politénico de Castelo Branco (14.798 recursos)

O Repositório Científico do Instituto Politécnico de Castelo Branco tem como objectivos fundamentais a divulgação, a preservação em formato digital e a partilha do conhecimento científico gerado na instituição, constituindo-se numa ferramenta de valor acrescentado porque permite aumentar a visibilidade e o impacto da investigação desenvolvida.

ESACB - Artigos em revistas com arbitragem científica

Mostrando recursos 1 - 20 de 158

  1. Fruit production from Opuntia ficus-indica ecotypes in comparison to commercial Italian clones

    Reis, C.M.G.; Gazarini, Luiz; Ribeiro, M.M.A.
    Fruit production, as an elementary chemical characteristic of the fruit, was evaluated in 16 Opuntia ficus-indica Portuguese ecotypes cultivated in a marginal soil without tillage, in the second and third years after plantation. The O. ficus-indica ecotypes were compared with the Italian cultivars ‘Bianca’ and ‘Gialla’. Significant differences were found among the O. ficus-indica ecotypes in biomass-related parameters and fruit yield, and different groups were established. Two spineless ecotypes (OFI-12 and OFI-13) had highest biomass production, with 9.9 Mg/ha dry matter on average. This was not significantly different from the ‘Gialla’ cultivar, which averaged 11.9 Mg/ha, for a density of...

  2. Assessment of Genetic Diversity in Opuntia spp. Portuguese Populations Using SSR Molecular Markers

    Reis, C.M.G.; Raimundo, Joana; Ribeiro, M.M.A.
    The Opuntia spp., most likely few individuals, were introduced in the Iberian Peninsula in the beginning of the 16th century, after the discovery of America, spreading afterwards throughout the Mediterranean basin. We analysed, for the first time, the genetic diversity in a set of 19 Portuguese Opuntia spp. populations from the species O. ficus-indica, O. elata, O. dillenii and O. robusta using nuclear microsatellite (nuSSR) markers. The Italian cultivars ‘Bianca’, ‘Gialla’ and ‘Rossa’ were included in the study for comparison purposes. The nuSSR amplifications produced from five to 16 alleles, with an average of 9.2 alleles per primer pair, and...

  3. Developing an index for forest productivity mapping - A case study for maritime pine production regulation in Portugal

    Mestre, S.; Alegria, C.M.M.; Albuquerque, M.T.D.; Goovaerts, P.
    Productivity is very dependent on the environmental and biotic factors present at the site where the forest species of interest is present. Forest site productivity is usually assessed using empirical models applied to inventory data providing discrete predictions. While the use of GIS-based models enables building a site productivity distribution map. Therefore, the aim of this study was to derive a productivity index using multivariate statistics and coupled GIS-geostatistics to obtain a forest productivity map. To that end, a study area vastly covered by naturally regenerated forests of maritime pine in central Portugal was used. First, a productivity index (PI) was built based on Factorial Correspondence...

  4. Cistus ladanifer (Cistaceae): a natural resource in Mediterranean-type ecosystems

    Frazão, David F.; Raimundo, Joana R.; Domingues, Joana L.; Quintela-Sabarís, Celestino; Gonçalves, J.C.; Delgado, F.M.G.
    Cistus ladanifer has a well-defined taxonomic identity. 2,2,6-trimethylcyclohexanone may be an authenticity and taxonomic marker. Its traits and applications make it a possible economic resource fitted for Mediterranean areas. Cistus ladanifer is a dominant shrub species endemic to the western Mediterranean region. Due to its dominant nature and its potential ecological, aromatic or pharmacological applications, C. ladanifer has been the object of numerous studies. In this review current knowledge on different aspects of this species is summarized, from its taxonomy to its chemical characterisation or its competitive traits. There are no doubts about the taxonomic entity of C. ladanifer, although...

  5. Perspetiva sobre o uso da biblioteca digital b-on pelos docentes do ensino superior – O caso do Instituto Politécnico de Castelo Branco

    Rodrigues, M.E.P.; Pulgarim Guerrero, A.; Pérez Pulido, M.
    Comunicação oral apresentada ao VIII Congresso Ibérico EDICIC que decorreu em Coimbra, na Universidade de Coimbra de 20 a 22 de novembro de 2017.

  6. Physicochemical characterization of Lavandula spp. honey with FT-Raman spectroscopy.

    Anjos, O.; Santos, A.J.A.; Paixão, V.; Estevinho, L. M.
    This study aimed to evaluate the potential of FT-Raman spectroscopy in the prediction of the chemical composition of Lavandula spp. monofloral honey. Partial Least Squares (PLS) regression models were performed for the quantitative estimation and the results were correlated with those obtained using reference methods. Good calibration models were obtained for electrical conductivity, ash, total acidity, pH, reducing sugars, hydroxymethylfurfural (HMF), proline, diastase index, apparent sucrose, total flavonoids content and total phenol content. On the other hand, the model was less accurate for pH determination. The calibration models had high r2 (ranging between 92.8% and 99.9%), high residual prediction deviation...

  7. Physicochemical characterization of Lavandula spp. honey with FT-Raman spectroscopy.

    Anjos, O.; Santos, A.J.A.; Paixão, V.; Estevinho, L. M.
    This study aimed to evaluate the potential of FT-Raman spectroscopy in the prediction of the chemical composition of Lavandula spp. monofloral honey. Partial Least Squares (PLS) regression models were performed for the quantitative estimation and the results were correlated with those obtained using reference methods. Good calibration models were obtained for electrical conductivity, ash, total acidity, pH, reducing sugars, hydroxymethylfurfural (HMF), proline, diastase index, apparent sucrose, total flavonoids content and total phenol content. On the other hand, the model was less accurate for pH determination. The calibration models had high r2 (ranging between 92.8% and 99.9%), high residual prediction deviation...

  8. Development of blueberry liquor: influence of distillate, sweetener and fruit quantity.

    Caldeira, I.; Lopes, D.; Delgado, T.; Canas, S.; Anjos, O.
    In this work different formulations of blueberry liquor were tested and characterised based on their physico-chemical and sensory characteristics.

  9. Development of blueberry liquor: influence of distillate, sweetener and fruit quantity.

    Caldeira, I.; Lopes, D.; Delgado, T.; Canas, S.; Anjos, O.
    In this work different formulations of blueberry liquor were tested and characterised based on their physico-chemical and sensory characteristics.

  10. Bioactive compounds and morphology in Opuntia spp. fruits from Portuguese ecotypes.

    Reis, C.M.G.; Gouveia, C.; Vitorino, M.C.; Gazarini, Luiz; Ribeiro, M.M.A.; Peres, M.F.
    The Opuntia spp. has minimal soil and water requirements, and the O. ficus-indica, in particular is sought to be an alternative for the Mediterranean region agricultural economy. The morphology, bioactive compounds and antioxidant properties of fruits were studied in twenty Portuguese ecotypes belonging to four Opuntia species (O. ficus-indica, O. robusta, O. dillenii and O. elata). The ecotypes were compared with the O. ficus-indica cultivars ‘Bianca’, ‘Gialla’ and ‘Rossa’. The fruits from Opuntia spp. ecotypes displayed variability in morphological and bioactive characteristics. Among O. ficus-indica ecotypes, the orange pulp fruits were larger, heavier and had a higher percentage of pulp...

  11. Gestão de infestantes em vinhas, olivais e pomares

    Portugal, João; Monteiro, Ana; Luz, J.P.
    A implementação de culturas perenes, em Portugal, sofreu nas últimas décadas grandes alterações quer na instalação da cultura quer nas técnicas de gestão. Este artigo revê a gestão das infestantes nas principais culturas perenes em Portugal, o que se julga pertinente dado que se tem verificado a implementação de sistemas de modo de produção biológica (MPB) e de produção integrada (MProdi). Por infestante, os autores, consideram as populações de uma dada espécie vegetal que acima de determinados níveis e sob condicionalismos ecológicos particulares sejam responsáveis por prejuízos “líquidos” (balanço benefícios prejuízos negativo) inaceitáveis em termos económicos e/ou ecológicos ou sociais....

  12. Gestão de infestantes em vinhas, olivais e pomares

    Portugal, João; Monteiro, Ana; Luz, J.P.
    A implementação de culturas perenes, em Portugal, sofreu nas últimas décadas grandes alterações quer na instalação da cultura quer nas técnicas de gestão. Este artigo revê a gestão das infestantes nas principais culturas perenes em Portugal, o que se julga pertinente dado que se tem verificado a implementação de sistemas de modo de produção biológica (MPB) e de produção integrada (MProdi). Por infestante, os autores, consideram as populações de uma dada espécie vegetal que acima de determinados níveis e sob condicionalismos ecológicos particulares sejam responsáveis por prejuízos “líquidos” (balanço benefícios prejuízos negativo) inaceitáveis em termos económicos e/ou ecológicos ou sociais....

  13. Hydrological Signatures Based on Event Runoff Coefficients in Rural Catchments of the Iberian Peninsula

    Taguas, Encarnación V.; Nadal-Romero, Estela; Ayuso, José L.; Casalí, Javier; Cid, Patricio; Dafonte, Jorge; Duarte, A.C.; Ferreira, Carla S.S.; Giménez, Rafael; Giráldez, Juan V.; Gómez-Macpherson, Helena; Gómez, Jose A.; González-Hidalgo, J. Carlos; Lana-Renault, Noemí; Lucía, Ana; Mateos, Luciano; Pérez, Rafael; Rodríguez-Blanco, M. Luz; Schnabel, Susanne; Serrano-Muela, M. Pilar; Taboada-Castro, M. Mercedes; Taboada-Castro, M. Teresa; Zabaleta, Ane
    Hydrological signatures are indices that help to describe the behavior of catchments. These indices can also be used to transfer information from gauged to ungauged catchments. In this study, different approaches were evaluated to determine volumetric runoff coefficients in 18 small/medium experimental gauged catchments of the Iberian Peninsula and to fit runoff calculations based on precipitation data for gauged and ungauged catchments. Using data derived from 1962 events, rainfall-runoff relationships were characterized and compared in order to evaluate the various hydrological response patterns. Volumetric runoff coefficients and cumulative runoff and precipitation ratios of the events that generated runoff (Rcum) minimized...

  14. Hydrological Signatures Based on Event Runoff Coefficients in Rural Catchments of the Iberian Peninsula

    Taguas, Encarnación V.; Nadal-Romero, Estela; Ayuso, José L.; Casalí, Javier; Cid, Patricio; Dafonte, Jorge; Duarte, A.C.; Ferreira, Carla S.S.; Giménez, Rafael; Giráldez, Juan V.; Gómez-Macpherson, Helena; Gómez, Jose A.; González-Hidalgo, J. Carlos; Lana-Renault, Noemí; Lucía, Ana; Mateos, Luciano; Pérez, Rafael; Rodríguez-Blanco, M. Luz; Schnabel, Susanne; Serrano-Muela, M. Pilar; Taboada-Castro, M. Mercedes; Taboada-Castro, M. Teresa; Zabaleta, Ane
    Hydrological signatures are indices that help to describe the behavior of catchments. These indices can also be used to transfer information from gauged to ungauged catchments. In this study, different approaches were evaluated to determine volumetric runoff coefficients in 18 small/medium experimental gauged catchments of the Iberian Peninsula and to fit runoff calculations based on precipitation data for gauged and ungauged catchments. Using data derived from 1962 events, rainfall-runoff relationships were characterized and compared in order to evaluate the various hydrological response patterns. Volumetric runoff coefficients and cumulative runoff and precipitation ratios of the events that generated runoff (Rcum) minimized...

  15. Património edáfico da cultura do pessegueiro na região da Beira Interior

    Simões, M.P.; Barateiro, Anabela; Ramos, Cristina; Lopes, Sandra; Gomes, P.; Simão, Paula; Ramos, Paulo; Calouro, Fátima; Luz, J.P.
    A cultura do pessegueiro na região da Beira Interior representa 23% da área total de pessegueiro de Portugal continental e 16% da área de culturas permanentes da região. Para a caracterização do potencial edáfico onde se desenvolve a cultura, foi efectuado um trabalho de sistematização dos dados referentes às análises de terra, através das Organizações de Agricultores reconhecidas para a prática da Protecção Integrada e Produção Integrada de Prunóideas (AAPIM, APPIZÊZERE e Cooperativa dos Fruticultores da Cova da Beira). O total das 117 análises disponíveis diz respeito ao conjunto de agricultores que exploram uma área de pessegueiros de 463 ha, o que...

  16. Património edáfico da cultura do pessegueiro na região da Beira Interior

    Simões, M.P.; Barateiro, Anabela; Ramos, Cristina; Lopes, Sandra; Gomes, P.; Simão, Paula; Ramos, Paulo; Calouro, Fátima; Luz, J.P.
    A cultura do pessegueiro na região da Beira Interior representa 23% da área total de pessegueiro de Portugal continental e 16% da área de culturas permanentes da região. Para a caracterização do potencial edáfico onde se desenvolve a cultura, foi efectuado um trabalho de sistematização dos dados referentes às análises de terra, através das Organizações de Agricultores reconhecidas para a prática da Protecção Integrada e Produção Integrada de Prunóideas (AAPIM, APPIZÊZERE e Cooperativa dos Fruticultores da Cova da Beira). O total das 117 análises disponíveis diz respeito ao conjunto de agricultores que exploram uma área de pessegueiros de 463 ha, o que...

  17. A comparison of the growth performance between cattle reared in conventional systems and in feral condition

    Nogales, Sergio; Calderón, Juan; Lupi, T.M.; Bressan, Maria Cristina; Delgado, Juan Vicente; Camacho, María Esperanza
    Feral and conventional growth performances were compared using Marismeña cattle as a model. Marismeña calves are commonly reared under feral conditions in one of the most important reserves of Europe (Doñana National Park, Spain). Data recording in these natural conditions faces compromises as animals are only handled once per year. This fact has to be saved to obtain efficient estimations for the biological growth curve of cattle reared under feral conditions. On the one hand, we assessed the inference of the theoretical influence of human management on cattle growth. On the other hand, we studied the fitness of the best...

  18. A comparison of the growth performance between cattle reared in conventional systems and in feral condition

    Nogales, Sergio; Calderón, Juan; Lupi, T.M.; Bressan, Maria Cristina; Delgado, Juan Vicente; Camacho, María Esperanza
    Feral and conventional growth performances were compared using Marismeña cattle as a model. Marismeña calves are commonly reared under feral conditions in one of the most important reserves of Europe (Doñana National Park, Spain). Data recording in these natural conditions faces compromises as animals are only handled once per year. This fact has to be saved to obtain efficient estimations for the biological growth curve of cattle reared under feral conditions. On the one hand, we assessed the inference of the theoretical influence of human management on cattle growth. On the other hand, we studied the fitness of the best...

  19. Organic amendments as a source of phosphorus: agronomic and environmental impact of different animal manures applied to an acid soil.

    Monteiro, M.C.H.; Roboredo, M.; Carneiro, J.P.; Duarte, A.C.; Torrent, J.; Sharpley, A.
    Phosphorus (P) is a non-renewable resource highlighting the significance of developing and using alternative P sources for a sustainable agriculture. The work aims to compare the effects of different organic amendments (OA) and a mineral P fertiliser as reference on P use efficiency by the crop, and on P losses to runoff waters and eroded sediments. A two-year field trial was conducted in a Dystric Regosol with Lolium sp. Treatments were: cattle manure compost (CM), solid fraction of swine (SS) and duck (DS) slurries and triple superphosphate (TSP), each applied at 50 kg P ha−1 year−1. Olsen P (mg P...

  20. Organic amendments as a source of phosphorus: agronomic and environmental impact of different animal manures applied to an acid soil.

    Monteiro, M.C.H.; Roboredo, M.; Carneiro, J.P.; Duarte, A.C.; Torrent, J.; Sharpley, A.
    Phosphorus (P) is a non-renewable resource highlighting the significance of developing and using alternative P sources for a sustainable agriculture. The work aims to compare the effects of different organic amendments (OA) and a mineral P fertiliser as reference on P use efficiency by the crop, and on P losses to runoff waters and eroded sediments. A two-year field trial was conducted in a Dystric Regosol with Lolium sp. Treatments were: cattle manure compost (CM), solid fraction of swine (SS) and duck (DS) slurries and triple superphosphate (TSP), each applied at 50 kg P ha−1 year−1. Olsen P (mg P...

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