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pro vyhledávání: '"Jehane Ragai"'
Autor:
Jehane Ragai
Publikováno v:
Substantia, Vol 2, Iss 1 (2018)
This article gives a historical overview of a number of chemical practices carried out by the Ancient Egyptians and shows that beyond being purely empirical, in more than one instance their methods suggest an understanding of the rudiments of modern
Externí odkaz:
https://doaj.org/article/617232f09f64487885e5059f8e60927f
Autor:
Jehane Ragai, Nahed Yacoub
Publikováno v:
Adsorption Science & Technology, Vol 31 (2013)
The photocatalytic behaviour of TiO 2 prepared from titanium (IV) ethoxide was determined with regard to the decomposition of methyl orange (MO) and methylene blue (MB) dyes, respectively. In addition, we compared the behaviour of TiO 2 photocatalyst
Externí odkaz:
https://doaj.org/article/bde8eb434e0f4192a233e530b1379f73
Publikováno v:
Adsorption Science & Technology, Vol 30 (2012)
Cobalt aluminate spinels were prepared from cobalt and aluminium nitrate solutions using sol–gel synthesis route by ammonium hydroxide precipitation. The gels were dried at 75°C, doped with different amounts of magnesium nitrate, and then calcined
Externí odkaz:
https://doaj.org/article/6fc68c61c0aa47f9824ae5856a424864
Publikováno v:
Adsorption Science & Technology, Vol 27 (2009)
Pore-size distribution studies were carried out employing nitrogen adsorption, mercury porosimetry and thermoporometry techniques on two titania gels prepared from titanous chloride and ammonia using oxygen gas as the oxidizing agent. These gels were
Externí odkaz:
https://doaj.org/article/40daf2aaa9414f239756e9c5a7ec6385
Publikováno v:
Adsorption Science & Technology, Vol 26 (2008)
Titanium oxides, with moderately high surface areas exhibiting a mixed mesoporous/microporous texture, were prepared from titanium ethoxide. The porosity seemed to stem from the loss of volatile components from the inner coordination sphere of the ti
Externí odkaz:
https://doaj.org/article/0d2e2970aa8e4cd7ad8d4265d4140ed5
Publikováno v:
Adsorption Science & Technology, Vol 23 (2005)
A study was carried out of the uptake of Cu 2+ , Ni 2+ , Co 2+ and Ca 2+ cations by hydrous titanium oxides prepared at different pH values using titanous chloride as the starting material and hydrogen peroxide as the oxidizing agent. Characterizatio
Externí odkaz:
https://doaj.org/article/745f9eb9c8754b6c8156490652986398
Autor:
Jehane Ragai
Publikováno v:
Adsorption Science & Technology, Vol 6 (1989)
A series of zirconia gels has been prepared at different pH values by the addition of aqueous ammonia to aqueous solutions of zirconyl chloride. The gels were air dried at 110°C and their surface characteristics and structure studied with the aid of
Externí odkaz:
https://doaj.org/article/d749ddd213b1474e960ba6a0c6807e45
Autor:
Jehane Ragai
In The Scientist and the Forger: Probing a Turbulent Art World the author draws upon an enthralling range of case studies, from Botticelli to Leonardo, Campendonk to Pollock and Chagall to Freud, equipping the reader with a holistic understanding of
