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The dissertation presents a study of the colloidal stabilization of ferrimagnetic barium hexaferrite nanoplatelets in various isotropic and nematic media for the preparation of ferromagnetic fluids. Colloidal stability is the most important requirement to obtain a ferromagnetic liquid of barium hexaferrite nanoplatelets that exhibits spontaneous magnetization in the absence of …

Human exposure to environmental stressors is widespread. Highly dynamic, these chemical, physical and social factors, collectively termed as the exposome, interact with internal factors such as genetics, sex, gut microbiome and general health status, and dictate susceptibility and risk for an onset of diseases. Human exposure to the chemicals is …

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 …

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 …

Of our main interest in this work is the stabilization of assemblies of topological defects (TDs) in liquid crystals (LCs). Due to the topological origin of TDs, the physics of defects is of interest for all branches of physics, including condensed matter systems, particle physics, and cosmology. LCs represent an …

Highly porous ceramic γ‒Al2O3 monoliths are important in many applications, e.g., catalysis, thermal insulation and adsorption, yet they still have a lot of unrecognized potential. There is a lot of incentive to employ simple and green fabrication processes for the preparation of such porous ceramic materials; however, many challenges, especially …

Permanent magnets are materials that generate a magnetic field in free space without electricity or other external energy sources. They are essential components of modern technologies, used in many electrical devices. Nowadays, they are included in technology for renewable sources of energy, such as electrical vehicles, generators and wind turbines. …

Gold miners (Artisanal and Small-Scale [ASGM]) operating in southwestern Ghana use exclusive mercury-gold amalgamation, cyanidation of gold-rich mercury-contaminated tailings, or a combination of both techniques during gold extraction; exposing water bodies within the catchment to mercury (Hg) and cyanide (CN) from mining discharged effluents. Additionally, sporadic CN spillage/leakage from Large …

The scientific backgrounds of technologies involved in the production of headlamps for the automotive industry are elaborated in this thesis. The experimental work was performed using an industrial plasma reactor with a volume of approximately 5 m3. The reactor enables three different operations, i.e., plasma pretreatment of workpieces made from …

Carbon, one of the most abundant materials in the earth crust, has gained research attention owing to its high structural stability, electrical conductivity, optical and thermal properties. Additionally, the possibility of tailoring carbon materials at nanoscales makes them promising materials for many applications, including energy storage, sensors, biomedical and electronics. …