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development of a method for simulating metabolism with the use of photocatalysis. Irradiation of a drug substance solution in the presence of photocatalyst molecules (TiO 2 ) with a specific wavelength causes the oxidation in a manner similar to the processes

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vapor deposition CVD) strongly affect the structure and properties of STM. Titania-silicas can possess (a) complex structure both in the bulk and at the surface layer, as it is in the fumed ST or (b) separated phases of TiO 2 and SiO 2 with a clear

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palladium systems supported on Al 2 O 3 [ 1 , 2 ], C [ 3 – 5 ], SnO 2 [ 6 – 8 ], CeO 2 [ 9 ], TiO 2 [ 10 , 11 ], and pumice [ 12 ]. Monometallic palladium catalysts are not very active in the reaction of nitrate reduction. However, they show high

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Introduction The photocatalyst, for example, titanium dioxide (TiO 2 ) absorbs light with suitable wavelength in photocatalysis. An electron from the valence band is transferred to the conduction band and creates negative

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nodes, using a micro-syringe. After the experiment, the resulting particle is removed from the apparatus for further investigation (final moisture content, strength, etc.) The product system under investigation is a titanium dioxide (TiO 2 ) suspension

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Abstract  

PET with 68Ga from the TiO2- or SnO2- based 68Ge/68Ga generators is of increasing interest for PET imaging in nuclear medicine. In general, radionuclidic purity (68Ge vs. 68Ga activity) of the eluate of these generators varies between 0.01 and 0.001%. Liquid waste containing low amounts of 68Ge activity is produced by eluting the 68Ge/68Ga generators and residues from PET chemistry. Since clearance level of 68Ge activity in waste may not exceed 10 Bq/g, as stated by European Directive 96/29/EURATOM, our purpose was to reduce 68Ge activity in solution from >10 kBq/g to <10 Bq/g; which implies the solution can be discarded as regular waste. Most efficient method to reduce the 68Ge activity is by sorption of TiO2 or Fe2O3 and subsequent centrifugation. The required 10 Bq per mL level of 68Ge activity in waste was reached by Fe2O3 logarithmically, whereas with TiO2 asymptotically. The procedure with Fe2O3 eliminates ≥90% of the 68Ge activity per treatment. Eventually, to simplify the processing a recirculation system was used to investigate 68Ge activity sorption on TiO2, Fe2O3 or Zeolite. Zeolite was introduced for its high sorption at low pH, therefore 68Ge activity containing waste could directly be used without further interventions. 68Ge activity containing liquid waste at different HCl concentrations (0.05–1.0 M HCl), was recirculated at 1 mL/min. With Zeolite in the recirculation system, 68Ge activity showed highest sorption.

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Journal of Thermal Analysis and Calorimetry
Authors:
V. Sydorchuk
,
W. Janusz
,
S. Khalameida
,
E. Skwarek
,
J. Skubiszewska-Zięba
,
R. Leboda
, and
V. Zazhigalov

]. The use of a more coarse dispersed support, namely fumed TiO 2 , results in formation of rigid porous compositions as a result of dry and wet milling (samples 3, 4). In both cases milled samples contain mesopores with two maxima in the same position

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) showed the presence of the following oxidation products: Fe 2 O 3 , Ni x Fe 3− x O 4 and TiO 2 (rutile). Fig. 9 X-Ray diffraction pattern of the powder containing 10 wt.% of nc-TiC 0.85 and 90 wt.% of 316L steel

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. Chibowski , S . Effect of functional groups of polyacrylamide and polyacrylic acid on their adsorption onto TiO 2 surface . J Colloid Interface Sci . 1990 ; 140 : 444 – 449 10.1016/0021-9797(90)90365-U . 2

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-7757(00)00496-9 . 4. Xiao , G , Wang , X , Li , D , Fu , X 2008 InVO 4 -sensitized TiO 2 photocatalysis for efficient air purification with visible light . J Photochem Photobiol A Chem 193 : 213 – 221 10.1016/j.jphotochem.2007

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