Materials Literature
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For characterization of catalytically active Mo species, Mo L III -edge XANES study has been introduced.Well-dispersed amorphous Mo 2 C species supported on H-MFI or Ga-substituted MFI (GaAl-MFI) show high and durable activity for methane dehydroaromatization. Unique Mo-carbide species on GaAl-MFI are formed in contac…
Cotton is used in judo therapists' fixation as a flexible material.There are 2 types of cotton ; 1) medical-grade sterilized absorbent cotton, which is degreased by boiling in sodium hydroxide solution followed by bleaching with hypochlorite or hydrogen peroxide solution and rinse with water; and 2) futon cotton, whic…
Το παρόν πόνημα αναπτύχθηκε προκειμένου να υποδειχθεί η σύνθεση και η μελέτη πολυλειτουργικών μαγνητικών νανοσωματιδίων τα οποία φέρουν μόρια της δραστικής φαρμακευτικής ουσίας Πακλιταξέλη (Ταξόλη - ΤΑXOLTM), ως εναλλακτικός τρόπος χορήγησης με υψηλή ακρίβεια στο στόχο, στο χρόνο και στην ποσότητα που απαιτείται για τ…
Modern technology development has made the border between life and matter more ambiguous. In this research, we aim to extract and express creature-like behavior from inanimate objects. By generating a standing wave with focused ultrasound, a phenomenon known as acoustic levitation enables a physical particle to float…
We have measured the phonon density of states (PDOS) of isolated bcc and fcc FexAu1-x alloy nanoclusters (NCs) by nuclear resonant inelastic X-ray scattering. Drastic deviations were observed with respect to the PDOS of bulk Fe-Au alloys. Important information on the structure and thermodynamic properties of these NCs…
The results of study on the chemical composition of austenitic steel for 12 elements in standard parts, obtained by casting, and used for critical parts of machines and mechanisms at elevated temperatures of operation, are discussed. Anomalous segregation of some elements set the practical limits of the instability of…
The paper reports data on glass formation in wider concentration ranges. The samples amorphous nature is characterized by x-ray diffraction analysis, their thermal characteristics and stability are determined by differential thermal analysis (DTA), while the transmission and absorption characteristics outlined are inv…
This article presents data referring to the mechanochemical activated synthesis of amorphous and crystalline LaBWO6. A stoichiometric mixture of La2O3, B2O3 and WO3 of a 1:1:2 molar ratio was subjected to intense mechanical treatment in air using a planetary ball mill (Fritsch - Premium line - Pulversette No. 7). The…
Atom transfer radical polymerization (ATRP) was applied for the preparation of block copolymers based on poly (ethylene glycol) monomethyl ether and poly (4-vinyl pyridine) (MeOPEG-b-P4VP). This was achieved using chloro-terminated PEG as a macroinitiator. Further, the ATRP was performed using 4-VP as a second forming…
The 18th Conference on Glass and Ceramics is dedicated to Prof. Christian Rüssel for his outstanding contributions to glass science and technology. Due to his close connections to Bulgarian scientists from Bulgarian Academy of Sciences and University of Chemical Technology and Metallurgy he was awarded the title Dr. h…
The current environmental policy imposes general optimisation of the industrial process. There are two critical steps related to suspensions fluidity in the ceramic spray-drying industry: the emptying of the ball mill and the spray-drying operation. The chemicals producers provide a large number of commercial defloccu…
Glasses with compositions xB2O3.(35-x)BaO.65V2O5 (x = 1, 3, 5, 7, 10, 15 mol %) were prepared using a conventional melt quenching method. DTA and DSC analysis were performed. The theoretical refractive index, electronic oxide ion polarizability, optical basicity and optical band gap of the glasses were calculated by L…
Intermetallic Co-Sn nanoparticles have been synthesized through a template borohydride reduction with NaBH4, using a carbon-containing support in a mixture of aqueous solutions of the corresponding chloride salts (CoCl2.6H2O and SnCl2.2H2O) at mass ratio Co:Sn = 35:65. The ratio is chosen in accordance with the Co-Sn…
An original patented procedure was applied to obtain activated ZnO powder and then it was doped with 1.5 mass % La to improve the photocatalytic performance. The effect of a nitric acid treatment (index a.t.) of the La/ZnO investigated by comparing with the non-treated La/ZnO samples, manifests a higher photocatalytic…
Pyrolysis is an essential preliminary step in a gasifier. The first step in modelling the pyrolysis process of biomass is creating a model for the chemical processes taking place. This model should describe the used fuel, the reactions taking place and the products created in the process. The numerous different polyme…
Composites based on Polyamide-6 with graphite and boron carbide were synthesized in an one step process, via activated anionic polymerization of e-caprolactam. Possible application of the composites as radiation protective materials was investigated by evaluating the absorption of thermal and fast neutrons. Based on t…
A numerical study has been conducted to investigate the effects of contamination on mass transfer into a spherical bubble. The influence of the contamination on the mass transfer inside the bubble was studied for different ranges of dispersed phase Reynolds numbers (0.1 < Red < 10), Schmidt numbers (0.7<Sc <5) and dif…
Some of corundum ceramics properties like high chemical resistance, hardness and mechanical strength make it an extremely suitable material for water tap gaskets and regulators. Solid fragments that normally get into the water, like sand, rust and limestone, cannot damage corundum ceramics. The latter stability allows…
Refractive index based oxide ion polarizability, αO2-(no), and optical basicity, Λ(no), values are determined for B2O3, SiO2, P2O5, GeO2, TeO2, Ga2O3, As2O3, La2O3 and Sb2O3 single component glasses on the basis of their refractive index and density. Basicity values of 0.46 for B2O3 glass, 0.53 for SiO2 glass, 0.54 fo…
The glass formation region in the section 90(xZnO.yWO3.zLa2O3).10Al2O3 of a constant Al2O3 content of 10 mol % and varying amounts of WO3, ZnO and Nd2O3 from ZnO-WO3-La2O3-Al2O3 system is determined by the melt quenching technique (with cooling rates of 10 Ks-1 - 102 Ks-1). The glasses are obtained from compositions o…