Now showing items 1-4 of 4

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      Encapsulation of methyl orange pH-indicator into a sol-gel matrix

      Zaggout, Farid R.; El-Ashgar, Nizam M.; Zourab, Shehata M.; El-Nahhal, Issa M.; Motaweh, Hanan (North-Holland, 2005)
      The acid catalyzed sol-gel reaction was used to encapsulate methyl orange pH-indicator into transparent monolithic silica matrices. Tetraethylorthosilicate was used for the entrapment of the methyl orange indicator. The ...
    • Encapsulation of Methyl Red pH‐Indicator into a Sol‐Gel Matrix

      Zaggout, Farid R.; El-Nahhal, Issa M.; Zourab, Shehata M.; El-Ashgar, Nizam M.; El‐dawahedy, Naji; Motaweh, Hanan (Taylor & Francis Group, 2005)
      Encapsulation of methyl red pH indicator into transparent monolithic silica matrices was made via the acid‐catalyzed sol‐gel reaction of tetraethylorthosilicate and methyl red indicator. The immobilized methyl red shows ...
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      Encapsulation of phenolphthalein pH-indicator into a sol-gel matrix

      El-Nahhal, Issa M.; Zourab, Shehata M.; El-Ashgar, Nizam M. (Taylor & Francis Group, 2001)
      Transparent monolithic silica doping with phenolphthalein has been prepared via the acid-catalyzed sol-gel reactions of tetraethylorthosilicate in the presence of phenolphthalein. The immobilized phenolphthalein pH-indicator ...
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      Nano-structured zinc oxide–cotton fibers: synthesis, characterization and applications

      El-Nahhal, Issa M; Zourab, Shehata M; Kodeh, Fawzi S; Elmanama, Abdelraouf A.; Selmane, Mohamed; Genois, Isabelle; Babonneau, Florence (Springer US, 2013)
      Zinc oxide nanoparticles were prepared and subsequently deposited onto the surface of the cotton fiber by ultrasonic irradiation. The optical, structure and morphology of the coated and un-coated cotton were examined by ...