Search Results (17)
Authenticity and traceability of food and food flavourings using a stable isotope approach
Food fraud or economically motivated adulteration has been an issue throughout history. Even today, it remains a significant and growing problem, driven by globalisation, economic opportunity and the low probability and severity of punishment. Fraud is a concern for food producers, consumers, regulatory agencies and scientific organisations, and food fraud …
Targeted analysis of organic contaminants, exposure assessment, and vulnerability of populations to hazardous compounds
From the moment of conception until death, humans are exposed to chemicals at varying intensities and frequencies. While an individual’s level of resilience is commonly high enough to tolerate these kinds of stressors, specific exposures or genetic predispositions can lower it. Therefore, the assessment of chemical exposure, the development of …
Development of novel 3D in vitro cell models for genotoxicity assessment
The determination of genotoxicity is an important element in the safety assessment of various substances, with the purpose of preventing a number of chemicals from affecting human health. Genotoxicity testing is required for all classes of chemicals, drugs and biological agents, which can lead to a wide range of diseases, …
Phase slip phenomena and vortex dynamics in mesoscopic superconductors
We investigate the dynamics in one-dimensional (1D) and two dimensional (2D) mesoscopic superconductors in an external magnetic field using the time-dependent Ginzburg-Landau equations. We analyze the different transitions between metastable states and describe the creation of topological defects that occur as the phase of the Ginzburg-Landau order parameter makes finite …
The hydrolysis of AlN powder and its use for the synthesys of nanostructured alumina coatings
he thesis describes a study of aluminum nitride (AlN) powder hydrolysis in the temperature range between 5 °C and 90 °C. The analysis of the temperature dependence of the course of the hydrolysis and the reaction kinetics, along with a mechanistic model set up for the hydrolysis reactions, gives a …
Measuring the probability for heterogenous recombination of hydrogen and oxygen atoms on surfaces of fusion relevant materials
This thesis presents studies of probability of heterogeneous recombination of oxygen and hydrogen atoms on surfaces of different types of carbon-based materials. The probability of heterogenous recombination is described with a quantity called recombination coefficient, which is defined as the probability that an atom which impinges upon a solid surface …
Occurrence, fate and removal of pharmaceutical residues in water treatment
The presence of pharmaceutical residues in surface waters is an emerging environmental issue that provides a new challenge to treatment systems for potable water, wastewater and water reuse. Their principle pathways into the sewerage system are twofold: first, after being administered to patients they are normally excreted as various metabolites …