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Remote Nodes topologies for hybrid WDM-ring TDM-tree passive optical networks
A. Baptista; M. Ferreira; A. Quintas; M. Lima; A. TeixeiraIn this paper is presented a WDM-ring TDM-tree passive optical network able to provide more than 1024 users spread over 100km with a symmetrical bandwidth of 100Mbps. A set of optically fed passive remote nodes are also presented able to provide increased efficiency and resili90ency. ; In this paper is presented a WDM-ring TDM-tree passive optical network able to provide more than 1024 users spread over 100km ...
Transport mechanism of macromolecules on hydrophilic bio-polymeric matrices : d...
Pinheiro, A. C.; Bourbon, A. I.; Vicente, A. A.; Quintas, Mafalda A. C.The transport mechanism of protein-based bioactive compounds (a peptide fraction from whey protein concentrate, glycomacropeptide and lactoferrin), from chitosan films to liquid medium, was studied. Mathematical models were used to discuss the transport mechanism. Data from release experiments was successfully described by a model which accounts for both Fick and Case II transport – the linear superimposition m...
Ewe mastitis and milk safety
Mendonça, Álvaro; Machado, M.; Tavares, A.; Quintas, Hélder; Fernandes, António; Maurício, Raimundo; Cardoso, ManuelIn order to assess the safety of milk used for produce raw milk ewe cheeses, we collect 60 milk aseptic samples from 60 half udders, during nine weeks, totalizing 540 samples. As result we identified 19 different microorganisms in 86 glands during the sampling time. Only one microorganism (S. aureus) could be dangerous for human health, found in the 6th week. All the others were almost all pathogens for animal ...
Efficiency of somatic cell count and california mastitis test in the diagnosis ...
Mendonça, Álvaro; Machado, M.; Tavares, A.; Quintas, Hélder; Valentim, Ramiro; Maurício, Raimundo; Cardoso, ManuelThis study aimed to compare the efficiency of microbiological test with Californian Mastitis Test and somatic cell count in the diagnosis of Subclinical Mastitis (SM) in Terrincha sheep. Twenty-seven of a flock of about 200 Terrincha ewes (local breed) were studied for a period of 9 weeks (n > 497 samples). Milk samples were aseptically collected from each half udder once a week. At the same time, another sampl...
A NMR approach to understand water behaviour on chitosan/ glycerol films
Fundo, J. F.; Almeida, P.; Carvalho, A.; Quintas, M. A. C.; Feio, G.; Silva, Cristina L. M.
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