Materials Literature
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The present study found that gold nanoparticles with nanosizes below 100 nm can be synthesized by a wet-chemical route, carried out by induced autocatalytic method. The successive liking of the neighboring nanoparticles seeds by benzenedimethanethiol (BDMT) followed by the induced reduction of Au (III) ions leads to t…
The present paper covers three silabridged hafnocene dichlorides(1, 2 and 3) prepared by sequential reactions of α, ω-dichloropermethyl polysilane with cyclopentadienyl sodium, n-butyl lithium and hafnium tetrachloride. Their structures were characterized by elemental analyses, UV, 1H(13C) NMR and MS. Furthermore the…
The characteristic studies, by means of LR, UV-Vis and XPS spectroscopies, of the preparation process of Mo-Co-S and Mo-Fe-S catalysts for HDS and HDN, derived from (NH4)2MoS4-CoCl2 and (NH4)2MoS4-FeCl2 complexes supported on γ-Al2O3, respectively, indicate that the catalytically essential moiety on the surface of the…
This work describes metal (M) and metal oxides (MO) films (where M = Ni, Co and Fe) obtained by electrosynthesis and chemical synthesis, and modified with carbon nanotubes (CNTs) on edged plane pyrolytic graphite electrode (EPPGE). The MO nanoparticles investigated are nickel oxide (NiO), cobalt oxide Co3O4) and iron…
The magnetic structure of the iron monoarsenide FeAs is studied using first-principles calculations. We consider the collinear and non-collinear (spin-spiral wave) magnetic ordering and magnetic anisotropy. It is analitically shown that a magnetic triaxial anisotropy results in a sum of two spin-spiral waves with oppo…
S-35 C, is a low steel carbon type with 0,30% - 0,35% carbon composition, which has a low hardness. This matter can be overcome by changing the hardness of this steel through heat treatment process. Heat treatment method used in this experiment is pack carburizing method. Experiment results showed that with compositio…
No presente trabalho, são apresentados resultados inéditos obtidos com um sistema de radiografia computadorizada de concepção inovativa de baixo custo, que foi desenvolvido no projeto de pesquisa P&D e testado com sucesso para a inspeção da integridade dos cabos em condição energizado das linhas de transmissão de 230…
Sistemi s kontroliranim sproscanjem imajo v vecini primerih prednost pred farmacevtskimi oblikami s takojsnjim sproscanjem. Tako s stalisca ucinkovitosti kot tudi varnosti. Za doseganje kontroliranega sproscanja se v vecini primerih danes uporabljajo alginati. Posebna oblika s prirejenim sproscanjem je farmacevtska uc…
In this work we perform a theoretical study about fluorine adsorption in BC2N nanostructures. The fluorine interaction with the BC2N nanostructures was studied using only atomic fluorine on two nanotubos with different chiralities (zigzag(5,0) and armchair(3,3)) and a monolayer. We used first principles calculations b…
Alumina-titanium diboride (Al2O3-TiB2) composites have high temperature, wear, and impact resistance that could be useful in high performance applications. Determining the effect of processing parameters on relative bond strength and effective plasticity may contribute to optimization and predictability of performance…
Systems in which magnetic ordering is suppressed to low temperatures due to competing interactions have attracted much attention in recent years. In Co1/3NbS2, the cobalt atoms are intercalated within the layered structure of the parent compound 2H-NbS2, forming the triangular lattice between NbS2 layers. At ambient p…
L'estructura i la dinamica dels liquids varien sota determinades condicions, tals com sota confinament o en presencia d'ions. Aquesta tesi es divideix en dues parts. En la primera part, s'han estudiat l'estructura i la dinamica d'aigua confinada en polyoxomolibdats gegants, per mitja de simulacions de dinamica molecul…
This paper is concerned with the identification of the dynamic moduli of viscoelastic constitutive models on the basis of a nonlinear optimization method by fitting data on carbon black-filled rubber. The models considered can be categorized in two different classes according to the definition of the relaxation functi…
The recently proposed constitutive framework based on logarithmic strain space by Miehe et al. (3) is a successful model for the modelling of amorphous glassy polymers. The modular structure of this model makes it attractive especially for the numerical implementation. In this contribution, the Miehe model will be ada…
ISBN: 978-0-415-68389-0
Abstract Not Provided
In this paper the effects of irradiation on the structures and properties of polysul-fone-polysiloxane multiblock copolymers and its important applied prospects are studied in detail.
An aluminium-substituted framework gallophosphate with occluded triethylamine was synthesized hydrothermally. 27Al MAS NMR spectroscopy indicates that only the tetrahedral coordinated gallium atoms in the gallophosphate are substituted by aluminium atoms. The substitution leads to an evident decrease in cell volume of…
In this paper, four new polymeric thiacrown ethers (PD1-PD4), in which some oxygen atoms of crown ring were replaced by sulfur atoms, with polythiaether backbone were synthesized via the intramolecular cyclization of poly (2'-chloroethyl-2, 3-epithiopropanyl ether) with various dimercaptans. The complexation capacitie…
Calculation of the bonding energy of a molecular orbital for a series of small molecules has been carried out by using ab initio STO-3G method. The results obtained demonstrate that the concept of the molecular orbital bonding energy is applicable for judging whether a molecular orbital is bonding, nonbonding or antib…