Search Results (94)
Characterization of Spirulina microalgae as a new alternative food source
A reduction in agricultural productivity associated with water scarcity and land degradation, combined with the growing world population and malnutrition highlights the need for new alternative food sources. In this challenging field, Spirulina microalgae emerges as a promising candidate thanks to its high nutritional value and beneficial effect on human …
Topology-induced phenomena and caloric effects in condensed matter
The first part of the thesis deals with the impact of surface-functionalized nanoparticles (NP) can have on the stability of liquid crystal (LC) phases. Experimental data of NP concentration-driven phase transition between the isotropic and nematic phase in 5OO8 LCs were used to create a minimal mathematical model that would …
The effect of spaceflight associated factors on the eye
The unexplained aetiology of Spaceflight Associated Neuro-ocular Syndrome (SANS) jeopardises all planned future missions to the Moon and Mars. Various intrinsic and extrinsic potential risk factors have been proposed to contribute to its manifestation. Specifically, the present thesis compared the effect of static exercise (simulating the exercise performed by astronauts …
Atomically resolved transmission electron microscopy and in-situ voltage driven dynamic response of domain walls in lead-free ferroelectrics
Ferroelectric domain walls (DWs) are nano-to-atomic-scale interfaces that separate domains of different polar order. What makes DWs so interesting is their dynamic nature in an electric field, which offers an exciting potential for nanoscale and atomic-scale applications, but, also, more generally, the dynamics of DWs is linked to a fundamental …
Surface modifications of cellulose nanomaterials: mechanisms, kinetics and their applications
Synthesized in green plants, cellulose is the most abundant natural biopolymer on the planet and is thus widely available, cheap and renewable. Furthermore, its hierarchical structure allows extraction of nanosized particles in the form of cellulose nanocrystals (CNCs), obtained with hydrolysis or cellulose nanofibrils (CNFs), isolated through chemical, biological pretreatment …
Identification of indoor radio environment properties based on channel state information using machine learning approaches
Characterization of the indoor radio environment (RE) is a prerequisite for advances in the design and optimization of next-generation indoor wireless networks and for the construction of a digital twin of the building. The need for comprehensive and accurate indoor characterization will be evident in the future hyper-connected mixed real-virtual …
The effect of surface roughness on erosion yields and distribution of impurities on fusion relevant materials
Plasma facing components (PFC) in fusion devices are exposed to plasma. Plasma-wall interaction processes are important as they impose a series of constraints on the components. The lifetime of the PFCs is dominantly determined by two processes: erosion and fuel retention. At the first wall the erosion is caused by …
Microstructural analysis and evaluation OF W and W/W2C composites for fusion application
Fusion technology has a great potential to safely provide an inexhaustible quantity of electricity without producing greenhouse gases and minimal hazardous waste compared to conventional energy sources, such as nuclear power plants. For materials intended for fusion plasma-facing applications, the essential properties are structural stability at elevated temperature, adequate thermal …
Use of hydrated glass for synthesis of waste-based foamed glass
Thermal insulation materials have a strong impact on energy efficiency of buildings which are one of the main energy consumers in the EU. Thermal insulation materials are widely used and improving their properties or improving their production can therefore have a rapid impact on the efficient use of energy in …
New methods for the determination of elemental composition and simple phenolic compounds in atmospheric particulate matter
Air pollution is an inevitable problem that modern society has to face today, with particulate matter (PM) being the most dangerous part of it, threatening human health and the environment. Not all PM particles, however, are equally harmful, since the dangerous potential depends on their size and chemical composition, which …