Recursos de colección

Repositório do Instituto Politénico de Castelo Branco (13.896 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 107

  1. Integrated planning for landscape diversity enhancement, fire hazard mitigation and forest production regulation: a case study in central Portugal

    Navalho, I.; Alegria, C.M.M.; Quinta-Nova, L.C.; Fernandez, P.
    Forest fires and forest biodiversity are related issues of major concern in Mediterranean countries and require an integrated approach to landscape planning. The aim of this study was to develop a GIS approach for regulating forest production while promoting landscape diversity and mitigating fire hazard. A study area located in the centre of Portugal was chosen. The area was primarily occupied by maritime pine and had a high fire hazard, low tree species diversity and an extensive protection area. The classical area control method was used to assist in forest production regulation. Species suitability maps were produced for 21 recommended...

  2. O uso da água na agricultura em Portugal. Parte I - Evolução da agricultura de regadio : aspetos sociais e institucionais

    Duarte, A.C.
    Nas condições climáticas de Portugal, a agricultura de regadio tem uma importância indiscutível na estrutura da produção final agrária, já que permite fazer culturas com maior valor acrescentado que as tradicionais culturas de sequeiro. Pretende-se neste estudo fazer uma abordagem integrada da questão do uso da água na actividade agrícola, enquadrada nos constrangimentos e oportunidades de cariz social e institucional. No último meio século constatou-se um significativo aumento da eficiência no uso da água na agricultura, a que tem correspondido um elevado consumo de energia. Dos aproveitamentos hidroagrícolas estudados, constata-se uma grande diversidade de esquemas de tarifação da água de...

  3. Os repositórios das instituições de ensino superior portuguesas : estudo comparativo

    Rodrigues, M.E.P.; Amante, M.J.; Pais., C; Lopes, S.; Segurado, T.; Rodrigues, A.M.
    O Movimento de Acesso Aberto ao Conhecimento provocou alterações no modelo de difusão e publicação de conhecimento científico, sendo os repositórios institucionais de acesso aberto os sistemas de informação que, ao nível das instituições de ensino superior, melhor concretizam este objetivo. O presente estudo pretende contribuir para o conhecimento do modo de funcionamento dos repositórios das instituições de ensino superior portuguesas presentes no Portal RCAAPi. O estudo foi realizado mediante aplicação de um inquérito por questionário aos gestores dos repositórios. Verificou-se que os bibliotecários desempenham um papel preponderante na organização e funcionamento dos Repositórios Institucionais. A maioria possui política de...

  4. Ischnura graellsii (Insecta: Odonata) a water pollution biovulnerability indicator-probability mapping using spatial uncertainty

    Campos, F.; Velasco, T.; Sanz, G.; Casanueva, P.; Albuquerque, M.T.D.; Antunes, I.M.H.R.
    Ischnura graellsii (Insecta: Odonata) a water pollution biovulnerability indicator-probability mapping using spatial uncertainty.

  5. Genetic diversity and hybridization in the two species Inga ingoides and Inga edulis: potential applications for agroforestry in the Peruvian Amazon

    Rollo, Alexandr; Lojka, Bohdan; Honys, David; Mandák, Bohumil; Wong, Julio A. Chia; Santos, Carmen; Costa, Rita; Quintela-Sabarís, Celestino; Ribeiro, M.M.A.
    Key message: Slash and burn practices affect tropical forests. Our results showed strong introgression between Inga ingoides and Inga edulis in the species contact area Interspecific hybridization could be sought to improve yield or tolerance to flooding and further increase the economic potential of the poorly drained Amazonian soils and minimize deforestation. Context: Inga species are important components of tropical American forests, as well as a local food source. Little is known about the genetic structure of these species; in particular the amount of introgression among species remains unknown. Aims: We assessed the degree of genetic divergence and introgression among...

  6. Nutritional value of Opuntia ficus-indica cladodes from Portuguese ecotypes

    Rodrigues, A.M.; Pitacas, F.I.; Reis, C.G.; Blasco, M.
    The use of Opuntia ficus-indica cladodes as a forage for ruminants has been very important in the semi-arid and arid regions of the world. O. ficus-indica cladodes can be fed to small ruminants especially in periods of the year when there is low quality and quantity of pasture. In Mediterranean regions like South of Portugal during the rainy season the availability of pasture is quantitatively and qualitatively satisfactory, but in critical times of the year the shortage and low nutritive value of forages causes decreased productivity in the ruminant’s production of milk and meat. The aim of this study was to evaluate the nutritional profile...

  7. Sero-epidemiological study of canine leishmaniosis in the Cova da Beira Region

    Coelho, S.; Matos, A.C.; Cardoso, L.; Brancal, H.; Martins, M.V.
    Sero-epidemiological study of canine leishmaniosis in the Cova da Beira Region.

  8. Histopathological aspects observed in deer (Cervus elaphus) mesenteric lymph nodes

    Matos, A.C.; Coelho, A.C.; Figueira, L.; Matos, M.; Pires, M.A.; Pinto, M.L.

  9. Prevalence of gross changes in wild boar (Sus scrofa) and deer (Cervus elaphus) mesenteric lymph nodes

    Matos, A.C.; Coelho, A.C.; Figueira, L.; Matos, M.; Pires, M.A.; Pinto, M.L.

  10. Pulmonary lesions consistent with disseminated adiaspiromycosis in Egyptian mongooses (Herpestes ichneumon) from Portugal

    Matos, A.C.; Figueira, L.; Martins, M.H.; Matos, M.; Pires, M.A.; Coelho, A.C.; Pinto, M.L.
    Pulmonary lesions consistent with disseminated adiaspiromycosis in Egyptian mongooses (Herpestes ichneumon) from Portugal.

  11. Diffuse lymphadenitis and disseminated Mycobacterium avium subsp. paratuberculosis infection in two wild Eurasian otters (Lutra lutra L. 1758)

    Matos, A.C.; Figueira, L.; Martins, M.H.; Matos, M.; Pires, M.A.; Álvares, S.; Mendes, A.; Sousa, N.; Coelho, A.C.; Pinto, M.L.
    Diffuse lymphadenitis and disseminated Mycobacterium avium subsp. paratuberculosis infection in two wild Eurasian otters (Lutra lutra L. 1758).

  12. Granulomatous sesions and Mycobacterium avium subsp. paratuberculosis in Portuguese wild boars (Sus scrofa)

    Matos, A.C.; Figueira, L.; Martins, M.H.; Matos, M.; Andrade, S.; Álvares, S.; Mendes, A.; Sousa, N.; Coelho, A.C.; Pinto, M.L.
    ranulomatous sesions and Mycobacterium avium subsp. paratuberculosis in Portuguese wild boars (Sus scrofa).

  13. Granulomatous lymphadenitis caused by Nocardia species in hunted wild boar (Sus scrofa) in Portugal

    Matos, A.C.; Dias, A.P.; Morais, M.; Matos, M.; Pinto, M.L.; Coelho, A.C.; Figueira, L.

  14. Survey of Mycobacterium avium subspecies paratuberculosis in road-killed wild carnivores in Portugal

    Matos, A.C.; Figueira, L.; Martins, M.H.; Loureiro, F.; Pinto, M.L.; Matos, M.; Coelho, A.C.
    A survey to determine the occurrence of Mycobacterium avium subsp. paratuberculosis (MAP) in wild carnivores in Portugal was conducted by testing samples from road-killed animals between 2009 and 2012. Postmortem examinations were performed and tissues were collected from wild carnivores representing four families and six different species, with a total of 74 animals analyzed. Cultures were performed by using Löwenstein-Jensen and Middlebrook 7H11 solid media and acid-fast isolates were identified by polymerase chain reaction (PCR) and mycobactin dependency characteristics. Tissues were also screened for MAP by directly extracting DNA and testing for the MAP-specific sequences. The occurrence of infected animals...

  15. Disseminated Mycobacterium bovis Infection in red foxes (Vulpes vulpes) with cerebral involvement found in Portugal

    Matos, A.C.; Figueira, L.; Martins, M.H.; Matos, M.; Morais, M.; Dias, A.P.; Pinto, M.L.; Coelho, A.C.
    A total of 49 road-killed red foxes were used for the detection of Mycobacterium tuberculosis complex (MTC) in Portugal. MTC infection was detected by PCR in 10 red foxes (20.4%; 95% confidence interval [CI] 8.8-31.2%) and confirmed in three (6.1%; 95% CI 0.0-7.9%) of them by microbiological culture. The complex was detected in 20 tissues out of 441 by PCR techniques (4.5%; 95% CI 16.3-23.7%) and in seven tissues out of 441 (1.6%; 95% CI 4.6-9.4%) by culture. MTC was most frequently detected in the brain (8.2%) and in the mediastinal lymph nodes (8.2%). The seven cultures obtained were positive...

  16. Mycobacterium bovis in an egyptian mongoose

    Matos, A.C.; Figueira, L.; Martins, M.H.; Matos, M.; Morais, M.; Dias, A.P.; Pinto, M.L.; Coelho, A.C.
    Mycobacterium bovis in an egyptian mongoose.

  17. Disseminated Mycobacterium avium subsp. paratuberculosis infection in two wild eurasian otters (Lutra lutra L.) from Portugal

    Matos, A.C.; Figueira, L; Martins, M.H.; Matos, M.; Álvares, S.; Pinto, M.L.; Coelho, A.C.
    Disseminated Mycobacterium avium subsp. paratuberculosis (MAP) infections were found in two Eurasian otters (Lutra lutra, L. 1758) killed by vehicular trauma in February and March 2010 in Castelo Branco, Portugal. At postmortem examination, the organs showed no significant gross alterations; however, microscopically, both animals had diffuse lymphadenitis with macrophage infiltration and deposition of hyaline material in the center of the lymphoid follicles. Acid-fast organisms were isolated from gastrointestinal tissue samples via bacteriologic culture. These organisms were identified as M. avium subsp. paratuberculosis by IS900 polymerase chain reaction (PCR). Additionally, direct IS900 PCR-positive results were obtained for multiple organs of both...

  18. Sustainability of phosphorus fertilisation: sources and forms of phosphate

    Monteiro, M.C.H.
    Phosphorus (P), which originates from a non-renewable natural resource, is essential for crop productivity, food security and human health, despite being a finite resource its use has been increasing consistently over the last few decades. The major use of the phosphate rock is the manufacture of P fertiliser, agriculture also being the main source for nonpoint source P pollution, which causes the eutrophication of water bodies. Thus, there is great need for a sustainable use of P with special attention to agricultural use, namely P fertilisation. This paper explores P sources and forms that could be phytoavailable and hence used...

  19. Prediction of five softwood paper properties from its density using support vector machine regression techniques

    García-Gonzalo, E.; Santos, A.J.A.; Martínez-Torres, J.; Pereira, H.; Simões, R.; García-Nieto, P.J.; Anjos, O.
    Prediction paper properties based on a limited number of measured variables can be an important tool for the industry. Mathematical models were developed to predict mechanical and optical properties from the corresponding paper density for some softwood papers using support vector machine regression with the Radial Basis Function Kemel. A dataset of different properties of paper handsheets produced from pulps of pine (Pinus pinaster and P. sylvestris) and cypress species (Cupressus lusitanica, C. sempervirens e C. arizonica) beaten at 1000, 4000, and 7000 revolutions was used. The results show that it is possible to obtain good models (with high coefficient...

  20. Fibre morphological characteristics of Kraft pulps of Acacia melanoxylon estimated by NIR-PLS-R models

    Pereira, H.; Santos, A.J.A.; Anjos, O.
    In this paper, the morphological properties of fiber length (weighted in length) and of fiber width of unbleached Kraft pulp of Acacia melanoxylon were determined using TECHPAP Morfir equipment (Techpap SAS, Grenoble, France), and were used in the calibration development of Near Infrared (NIR) partial least squares regression (PLS-R) models based on the spectral data obtained for the wood. It is the first time that fiber length and width of pulp were predicted with NIR spectral data of the initial woodmeal, with high accuracy and precision, and with ratios of performance to deviation (RPD) fulfilling the requirements for screening in breeding programs. The selected models for fiber...

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