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Structure, thermal properties, conductivity and electrochemical stability of di...
Gonçalves, M. C.; Zea Bermudez, V. de; Silva, Maria Manuela; Smith, Michael John; Morales, Enrique; Ferreira, R. A. Sá; Carlos, L. D.Variable chain length di-urethane cross-linked poly(oxyethylene) (POE)/siloxane hybrid networks were prepared by application of a sol-gel strategy. These materials, designated as di-urethanesils (represented as d-Ut(Y’), where Y’ indicates the average molecular weight of the polymer segment), were doped with lithium triflate (LiCF3SO3). The two host hybrid matrices used, d-Ut(300) and d-Ut(600), incorporate POE...
Effect of sodium and nitrogen on yield function of irrigated maize in Southern ...
Ramos, Tiago; Gonçalves, M.C.; Castanheira, N.L.; Martins, J.C.; Santos, F.L.; Fernandes, M.L.Salinization and nitrate leaching are two of the leading threats to the environment of the European Mediterranean regions. Inefficient use of water and fertilizers has led to a nitrate increase in the aquifers and reduction in crop yields caused by salts. In this study, a triple emitter source irrigation system delivers water, salt (Na+), and fertilizer (N) applications to maize (Zea mays L.). The objective of ...
Effect of preparation conditions on morphology, drug content and release profil...
Bazzo,G. C.; Lemos-Senna,E.; Gonçalves,M. C.; Pires,A. T. N.In this study, poly(hydroxybutyrate) microparticles containing piroxicam were prepared by the oil-in-water emulsion-solvent evaporation method. The effects of some process conditions on drug content were determined using a 2³ factorial design. The piroxicam loading efficiency varied from 5.5 to 89.8 %. Hollow and irregular microparticles with drug crystals on their surfaces were obtained when 5 mL of chloroform...
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