Effect of TiO2 and ZnO powder mixtures on mechanical and photocatalytic performance of high performance concrete

The development of new modified cement-based materials is increasingly becoming a necessity for improving the durability and surface performance of building materials. Titanium dioxide (TiO2) photocatalyst has been widely used in building materials science due to its ability to break down pollutants. Zinc oxide (ZnO) is often considered a substituent for TiO2 because of its photocatalytic and photoluminescent properties. A new inorganic nanocomposite photocatalyst, based on titanium and zinc oxides, is introduced in this work in order to study its compatibility with High Performance Concrete (HPC). This research aims to study the mechanical and photocatalytic behavior of mixtures based on nanoparticles in HPC. The study of the efficiency in the nitrogen oxides (NOx) degradation of modified HPC in TiO2 and ZnO with different percentages is studied. The studies have shown that the introduction of titanium dioxide in HPC presents a significant efficiency for the NOx degradation and a positive effect on the mechanical properties than zinc oxide, and thus represents potential contribution to sustainability of concrete structures

Graphitic carbon nitride for photocatalytic air treatment

Graphitic carbon nitride (g-C3N4) is a conjugated polymer, which recently drew a lot of attention as a metal-free and UV and visible light responsive photocatalyst in the field of solar energy conversion and environmental remediation. This is due to its appealing electronic band structure, high physicochemical stability and earth-abundant nature. In the present work, bulk g-C(3)N(4)was synthesized by thermal decomposition of melamine. This material was further exfoliated by thermal treatment. S-doped samples were prepared from thiourea or further treatment of exfoliated g-C(3)N(4)by mesylchloride. Synthesized materials were applied for photocatalytic removal of air pollutants (acetaldehyde and NOx) according to the ISO 22197 and ISO 22197-1 methodology. The efficiency of acetaldehyde removal under UV irradiation was negligible for all g-C(3)N(4)samples. This can be explained by the fact that g-C(3)N(4)under irradiation does not directly form hydroxyl radicals, which are the primary oxidation species in acetaldehyde oxidation. It was proved by electron paramagnetic resonance (EPR) spectroscopy that the dominant species formed on the irradiated surface of g-C(3)N(4)was the superoxide radical. Its production was responsible for a very high NO(x)removal efficiency not only under UV irradiation (which was comparable with that of TiO2), but also under visible irradiation.Web of Science1313art. no. 303

Scaling up anodic TiO2 nanotube layers - Influence of the nanotube layer thickness on the photocatalytic degradation of hexane and benzene

In this work, the preparation of homogenous TiO2 nanotube (TNT) layers with different thicknesses via anodization on Ti substrates with a large geometrical area of two times 5 cm x 10 cm (i.e. both sides of the Ti substrate) is shown for the first time. TNT layers with four different thicknesses of similar to 0.65 mu m, similar to 1 mu m, similar to 7 mu m, and similar to 14 mu m were prepared with excellent conformality and homogeneity over the anodized area. These TNT layers were successfully employed as photocatalysts for the degradation of hexane and benzene as model compounds in the gas phase under ISO standards, showing an increase of the conversion for both model compounds with the TNT layer thickness. While a stable hexane conversion was observed for all TNT layers during the measuring time of three hours, in case of benzene degradation an initial conversion decrease was monitored before the conversion stabilized. Despite this trend, SEM and XPS analyses did not reveal any significant amount of reaction products on the TNT layer surface

Nemzeti érdekek az EU-ban. Az olasz európa-politika tanulságai, különös tekintettel az európai gazdasági kormányzásban betöltött szerepre = National Interests in the EU. Experiences of Italy’s European policy with special regard to its role in the European economic governance

A disszertáció a hazai és a nemzetközi szakirodalom elemzésén keresztül vizsgálja a nemzeti és az európai (közösségi) érdek viszonyát, ezek alakulását az integrációs folyamatban. Választ próbál találni arra, hogy mi a fő oka annak az utóbbi évtizedben egyre inkább erősödő jelenségnek, amely az EU nemzetek feletti jellegének visszaszorulásában, és ezzel párhuzamosan a közösségi szakpolitikák alakításakor a kormányközi logika érvényesülésének erősödésében összegezhető. Az elemzés során nem lehet eltekinteni az európai integráció társadalmi aspektusaitól, így ezek között kiemelten a projekttel való lakossági azonosulás, más szóval az egyébként sokdimenziós, tagállamonként és időben változó identitás problematikájától. A dolgozat kiemelten foglalkozik az olasz Európa-politika fejlődésével és érvényesülésével. Róma EU-politikájának elemzése már csak azért is érdekes feladat, mert Itália európai középhatalmi státuszából adódóan az a klasszikus közösségi-államközi, látszólag ellentétes „módszer” metszéspontjában található. Megnyilvánulási formái ennek megfelelően – a külső szemlélő számára akár bizonytalankodásnak hatóan - váltakozó hangsúllyal ötvözik a nemzetek feletti és a kormányközi stratégiát. Az olasz integrációs politika hagyományainak, általános geopolitikai-külpolitikai keretrendszerének, változásainak részletes elemzése elengedhetetlen az egyes szakpolitikák terén tanúsított olasz törekvések megértéséhez. (...

Extraction of BoNT/A, /B, /E, and /F with a Single, High Affinity Monoclonal Antibody for Detection of Botulinum Neurotoxin by Endopep-MS

Botulinum neurotoxins (BoNTs) are extremely potent toxins that are capable of causing respiratory failure leading to long-term intensive care or death. The best treatment for botulism includes serotype-specific antitoxins, which are most effective when administered early in the course of the intoxication. Early confirmation of human exposure to any serotype of BoNT is an important public health goal. In previous work, we focused on developing Endopep-MS, a mass spectrometry-based endopeptidase method for detecting and differentiating the seven serotypes (BoNT/A-G) in buffer and BoNT/A, /B, /E, and /F (the four serotypes that commonly affect humans) in clinical samples. We have previously reported the success of antibody-capture to purify and concentrate BoNTs from complex matrices, such as clinical samples. However, to check for any one of the four serotypes of BoNT/A, /B, /E, or /F, each sample is split into 4 aliquots, and tested for the specific serotypes separately. The discovery of a unique monoclonal antibody that recognizes all four serotypes of BoNT/A, /B, /E and /F allows us to perform simultaneous detection of all of them. When applied in conjunction with the Endopep-MS assay, the detection limit for each serotype of BoNT with this multi-specific monoclonal antibody is similar to that obtained when using other serotype-specific antibodies

Module for converting documents to PDF

Práce se zabývá sazbou dokumentů a převodem dokumentu XML do velice populárního a široce používaného formátu PDF. Obsahem teoretické části je rešerše již existujících nástrojů, pro sazbu dokumentů. Dále jsou popsány základní informace o technologiích, které se hojně využívají pro XML transformace a jejich použití. V této části je také popsán princip transformací a jejich výhody. V praktické části je vysvětlena struktura knihovny dll, naprogramovaná pro samotnou transformaci, popis procesoru FO a v neposlední řadě je vysvětleno použití nástroje pro vytváření šablon XSLT.The Bachelor Dissertation's main objective is desktop publishing and transforming XML documents into widely used PDF format. In theoretic part you can find the research of already existing tools for desktop publishing. The next part is about basic technological information, which are used for XML transformation and their usage. In this part you can also find the principle of transformation and it's advantage. In the practical part there is explained structure of dll library, description of FO processor and at last but not least there is explanation of tools for creating XSLT templates.Katedra informačních technologiíStudent splnil dle vedoucího práce všechny požadavky, které byly uvedeny v zadání práce. Navržený editor i knihovna jsou funkční a poměrně na vysoké úrovni. Členění textu je srozumitelné a logické. Rozsah práce je však poměrně malý. Komise měla k obsahu bakalářské práce několik výhrad. Bakalářskou práci komise ohodnotila stupněm velmi dobře