Browsing Centrum materiálového výzkumu by Title
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Cement Kiln By-Pass Dust: An Effective Alkaline Activator for Pozzolanic Materials
(MDPI, 2018-09-19)Cement kiln by-pass dust (CKD) is a fine-grained by-product of Portland clinker manufacturing. Its chemical composition is not suitable for returning back into feedstock and, therefore, it has to be discharged. Such an ... -
Compositional and Temperature Effects on the Rheological Properties of Polyelectrolyte–Surfactant Hydrogels
(MDPI, 2019-05-27)The rheological properties of hydrogels prepared by physical interactions between oppositely charged polyelectrolyte and surfactant in micellar form were studied. Specifically, hyaluronan was employed as a negatively charged ... -
Effect of Selected Commercial Plasticizers on Mechanical, Thermal, and Morphological Properties of Poly(3-hydroxybutyrate)/ Poly(lactic acid)/Plasticizer Biodegradable Blends for Three-Dimensional (3D) Print
(MDPI, 2018-10-03)This paper explores the influence of selected commercial plasticizers structure, which are based on esters of citric acid, on mechanical and thermal properties of Poly(3-hydroxybutyrate)/Poly(lactic acid)/Plasticizer ... -
Fluorescence study of freeze-drying as a method for support the interactions between hyaluronan and hydrophobic species
(PLOS, 2017-10-03)A freeze-drying method enabling solubilization of hydrophobic species in aqueous solutions of native hyaluronan is described. The method is based on opening the access to supposed hydrophobic patches on hyaluronan by ... -
How Humic Acids Affect the Rheological and Transport Properties of Hydrogels
(MDPI, 2019-04-19)Humic acids are often regarded as substances with a supramolecular structure which plays an important role in Nature. Their addition into hydrogels can affect their behavior and functioning in different applications. This ... -
Improving cytocompatibility of CdTe quantum dots by Schiff-base-coordinated lanthanides surface doping
(BioMed Central, 2018-04-19)Background: Suitable fluorophores are the core of fluorescence imaging. Among the most exciting, yet controversial, labels are quantum dots (QDs) with their unique optical and chemical properties, but also considerable ... -
Influence of alkali ions on the efficiency of shrinkage reduction by polypropylene glycol in alkali activated systems
(ICE Publishing, 2018-06-01)Alkali-activated materials, especially when activated by water glass, exhibit substantial drying shrinkage that hinders their broader industrial application. The effect of shrinkage-reducing admixtures (SRA), based on ... -
The influence of barium sulphate and barium carbonate on the Portland cement
(Elsevier Ltd., 2016-08-03)Shielding of different types of radiation should be studied these days when there is a great development in the field of nuclear science. Barium ions can shield different type of radiation, therefore, by incorporation of ... -
Investigation Of Electric And Thermal Properties Of Alkali-Activated Aluminosilicates With A CNT Admixture
(University of Chemistry and Technology, Prague, 2020-04-20)The paper is focused on measurements of electric and thermal properties of alkali-activated aluminosilicates (AAAs) with a carbon nanotube (CNT) admixture. Such composites, fabricated from blast-furnace slag, quartz sand, ... -
Lignitic humic acids as environmental friendly adsorbent for heavy metals
(Hindawi, 2017-03-05)Humic acids are a part of humus material, are abundant in nature, and form a substantial pool of natural organic matter. They participate in the transport of both beneficial and harmful species. Due to their structure and ... -
Novel Riboflavin-Inspired Conjugated Bio-Organic Semiconductors
(MDPI, 2018-09-05)Flavins are known to be extremely versatile, thus enabling routes to innumerable modifications in order to obtain desired properties. Thus, in the present paper, the group of bio-inspired conjugated materials based on the ... -
Preparation and Characterisation of Highly Stable Iron Oxide Nanoparticles for Magnetic Resonance Imaging
(Hindawi Publishing Corporation, 2017-02-23)Magnetic nanoparticles produced using aqueous coprecipitation usually exhibit wide particle size distribution. Synthesis of small and uniform magnetic nanoparticles has been the subject of extensive research over recent ... -
Preparation of ultra-low volume weight autoclaved aerated concrete
(University of Chemistry and Technology, Prague, 2017-01-31)Autoclaved aerated concrete is a modern construction material that gains its popularity especially due to its thermal insulation performance resulting from low volume weight and porous structure with sufficient mechanical ... -
Production of Polyhydroxyalkanoates Using Hydrolyzates of Spruce Sawdust: Comparison of Hydrolyzates Detoxification by Application of Overliming, Active Carbon, and Lignite
(MDPI AG, 2017-05-28)Polyhydroxyalkanoates (PHAs) are bacterial polyesters which are considered biodegradable alternatives to petrochemical plastics. PHAs have a wide range of potential applications, however, the production cost of this ... -
A simple technique for assessing the cuticular diffusion of humic acid biostimulants
(BMC, 2019-07-31)Background: Experimental determination of the extent and rate of transport of liquid humates supplied to plants is critical in testing of physiological effects of such biostimulants which are often supplied as foliar sprays. ... -
Thermodynamic analysis of chemically reacting mixtures – comparison of first and second order models
(Frontiers, 2018-03-01)Recently, a method based on non-equilibrium continuum thermodynamics which derives thermodynamically consistent reaction rate models together with thermodynamic constraints on their parameters was analyzed using a triangular ... -
Thermodynamic Driving Forces and Chemical Reaction Fluxes; Reflections on the Steady State
(MDPI, 2020-02-01)Molar balances of continuous and batch reacting systems with a simple reaction are analyzed from the point of view of finding relationships between the thermodynamic driving force and the chemical reaction rate. Special ... -
Transesterification of Lactic Acid Oligomers with Ethanol, a Way to Anhydrous Ethyl Lactate: A Kinetic Study
(MDPI, 2018-08-15)A new method for the preparation of anhydrous ethyl ester of lactic acid was studied. The selected method is based on catalytic transesterification of lactic acid oligomers, which were prepared for this purpose by autocatalytic ...