Browsing by Keyword "Sodium"

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    • closedAccess   Effect of sodium addition on the preparation of hydroxyapatites and biphasic ceramics 

      Kannan, S.; Ventura, Jofre M. G.; Lemos, A. F.; Barba-Juan, Antonio; Ferreira, J. M. F. (2008)
      HAP and biphasic ceramics of two different HAP and β-TCP proportions with substituted sodium were prepared through an aqueous precipitation method. The prepared powders were characterized by XRD, thermal analysis, FT-IR ...

    • closedAccess   Geostatistical methods to identify and map spatial variations of soil salinity 

      Juan, Pablo; Mateu, Jorge; Jordán Vidal, Manuel Miguel; Mataix-Solera, Jorge; Meléndez-Pastor, I.; Navarro Pedreño, José Elsevier (2011-01)
      The problem of estimating and predicting spatial distribution of a spatial stochastic process, observed at irregular locations in space, is considered in this paper. Environmental variables usually show spatial dependencies ...