Materials Literature
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Ferritic stainless steels currently used as the interconnect materials in solid oxide fuel cells do not exhibit adequate electronic conductivity over expected periods of service. In addition to the relatively poor conductivity of the oxide scales, the metal–oxide scale interfacial defects contribute to significant con…
Two kinds of high nitrogen-containing Ni-free austenitic stainless steels for medical applications were used for evaluation of fatigue behavior. One was an Fe-23%Cr-1%N stainless steel heat-treated in a N2 gas atmosphere (NA alloy) and the other was an Fe 24%Cr-2%Mo-1%N stainless steel fabricated with an electro-slag…
O presente trabalho tem por objetivo o reaproveitamento de resíduos sólidos na preparação de painéis para uso na arquitetura. Para atingir as metas propostas, painéis foram preparados a partir de resíduos provenientes de embalagens cartonadas e plásticas, utilizando-se como elemento de reforço, resíduos lignocelulósic…
Poly(D,L-lactide-co-glycolide) (PLGA) is a biodegradable and biocompatible polymer material for drug deliver system. The aim of this study is to synthesize drug-loaded PLGA nanoparticles for sustained release and its anticancer effect in vitro. PLGA nanoparticles were prepared with modified solvent evaporation method.…
The aim of this work was to evaluate the use of Pluronic F127 (PF) hydrogels incorporating liposomes and/or grafted with alginate (AP) for the parenteral delivery of cisplatin. The physicochemical properties such as scanning electron microscopy (SEM), polarity and sol-gel transition temperature, as well as in vitro dr…
Water-soluble porphyrins can be phase transferred by the hyperbranched multiarm copolymer PEI-PZLys; good catalytic activities and recyclabilities were observed for oxidation catalyzed by the encapsulated porphyrins.
The synthesis of phosphorous phthalocyanines, triazatetrabenzcorroles, and tetrabenzotriazaporphyrins with a variety of axial ligands is reported. The new complexes are: phosphorous dihydroxy tetrabenzotriazaporphyrin (5, P V (OH) 2 TBTAP), diphenyl phosphorous phthalocyanine (6, [P V (Ph) 2 Pc](OH)), diphenyl phospho…
A new restriction effect of hard templates for the shrinkage of mesoporous polymer results in anomalous increase of the mesopore size during carbonization.
Magnetite-based polyelectrolyte-coated nanostructures were fabricated and the potential for biomedical application assessed in mixed glial cell cultures with nanostructure cellular internalization, cytotoxicty and contribution to magnetic resonance contrast generation all examined.
The purpose of the present investigations is to study the feasibility of decreasing the shell wall thickness of mould cavity for economical and statistically controlled rapid casting solution of low brass alloy using three dimension printing technology. Starting from the identification of component/benchmark, technolo…
Three supramolecular architectures based on alpha-Keggin-type polyoxometalates have been synthesized hydrothermally, and their structures have been characterized by elemental analyses, infrared (IR) spectroscopy, X-ray photoelectron spectroscopy (XPS) and single crystal X-ray diffraction structure analyses. [Ni(enMe)(…
Synthesis of gold and silver nanoparticles at room temperature using a polydimethylsiloxane (PDMS) microreactor has been reported. The reactions have been performed using aqueous metal salt solutions and borohydride reducing agent with tri-sodium citrate as the capping agent. Effect of concentration of reducing agent…
New mesogenic heteropolynuclear complexes of Cu(II), Pd(II), Ni(II) and VO(IV) with the [3]ferrocenophane‐containing Schiff's base, and Cu(II) and Pd(II) complexes with the [3]ferrocenophane‐containing β‐aminovinylketone have been synthesised. The obtained heterometallic mesogenes are identified by elemental analysis,…
A dyad of porphyrin and N-confused porphyrin is synthesized for the first time, in which an efficient excitation energy transfer as well as enhancement of emission quantum yield induced by anion binding is observed.
O interesse pela utilização de fibras vegetais como reforço para polímeros tem aumentado recentemente devido às suas vantagens ambientais e tecnológicas. Este trabalho avaliou o uso de fibras de Curauá para substituir a fibra de vidro em compósitos de poliamida-6. Teores de fibra de 0, 20, 30 ou 40 wt% e comprimento d…
The relationships between the cathode performance, the (LSCF)/Ag ratios, and the porosity of the LSCF–Ag cermet cathode were investigated. The Ag fractions in the LSCF–Ag powder were changed from 20 to 80 wt %. The microstructures of the porous LSCF–Ag cermet cathodes were observed using a scanning electron microscope…
The first nickel complexes of two carbon-substituted phthalocyanine analogues are reported; both exhibit direct Ni-C bonding and oxygen activation chemistry is observed.
The inhibition efficiency (IE) of K 3 [Fe(CN) 6 ] in controlling corrosion of carbon steel in aqueous solution containing 60 ppm of Cl -in the presence and absence of Zn 2+ has been evaluated by weight loss method. The formulation consisting of 100 ppm K 3 [Fe(CN) 6 ] and 50 ppm Zn 2+ offers 98% inhibition efficiency…
The combined effects of alkali and ultrasound treatment of wood flour on the mechanical properties of polypropylene-based wood/plastic composites (WPCs) were examined. FT-IR measurements confirmed that the alkali treatment removed both hemicellulose and lignin from the wood, and there was an increase in the number of…
Surface enhanced Raman scattering (SERS) has been used to detect specific pterin molecules at sub-nanomolar concentrations. SERS is fast becoming a widely used technique for the sensitive and specific detection of multiple analytes. The information-rich and concentration-dependent spectra obtained from SERS make the t…