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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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Orvosi Hetilap
Authors:
Tamara Horváth
,
András Papp
,
Mónika Kiricsi
,
Nóra Igaz
,
Vivien Trenka
,
Gábor Kozma
,
László Tiszlavicz
,
Zsolt Rázga
, and
Tünde Vezér

materials: from fundamentals to applications. Building Environ. 2009; 44: 1899–1906. 9 Shakeel M, Jabeen F, Shabbir S, et al. Toxicity of nano-titanium dioxide (TiO 2 -NP) through

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mineral names are shown in Chapter Analytical methods, TiO 2 -1-2: identifiers in Supp. Table 1 Several different compositional phases of ilmenite can be observed on the BSE images of Sample 784

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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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Nanopages
Authors:
I. Tamáska
,
Z. Vértesy
,
A. Deák
,
P. Petrik
,
K. Kertész
, and
László Biró

Bioinspired 1+2D nanoarchitectures inspired by the quasi-ordered structures occurring in photonic nano-architectures of biological origin, like for example butterfly scales, were produced by depositing a layer of SiO2 nanospheres (156 nm and 292 nm in diameter) on Si wafers, over which a regular multilayer composed from three alternating layers of SiO2 and TiO2 was deposited by physical vapor deposition. Flat multilayers were deposited in the same run on oxidized Si (324 nm SiO2 thickness) for comparison. Different types of disorder (in plane and out of plane) were purposefully allowed in the 1+2D nanoarchitectures. The positions of the specular reflection maxima for the flat multilayer and for the two different bioinspired nanoarchitectures were found to be similar. Additionally to this, the bioinspired nanoarchitectures exhibited angle independent diffuse reflection too, which was absent in the flat multilayer. Different model calculations were made to explain the specular and diffuse optical properties of the samples. Satisfactory agreement was obtained between experimental data and model calculations.

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mentioned in the literature for this kind of research is the induction of photocatalytic transformation of drugs with the use of titanium dioxide (TiO 2 ). The achieved results indicate that identified degradation products are the same as obtained in in vivo

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