9 documents found, page 1 of 1
Thermal Stability and Irradiation Resistance of (CrFeTiTa)70W30 and VFeTiTaW Hi...
Pereira, André; Martins, Ricardo; Monteiro, Bernardo; Correia, Jose B.; Galatanu, Andrei; Catarino, Norberto; Jenus, Petra; Dias, MartaABSTRACT: Nuclear fusion is a promising energy source. The International Thermonuclear Experimental Reactor aims to study the feasibility of tokamak-type reactors and test technologies and materials for commercial use. One major challenge is developing materials for the reactor's divertor, which supports high thermal flux. Tungsten was chosen as the plasma-facing material, while a CuCrZr alloy will be used in t...
Influence of Cr on the quaternary FeTaTiW medium entropy alloy
Martins, Ricardo; Monteiro, Bernardo; Pereira Gonçalves, Antonio; Correia, Jose B.; Galatanu, Andrei; Alves, Eduardo; Tejado, ElenaABSTRACT: The search for advanced materials has been growing, and high entropy alloys (HEAs) are emerging as promising candidates for application in the fusion domain. This work investigates the effect of Cr on the FeTaTiW medium entropy alloy to form (CrFeTaTi)70W30 high entropy alloy, comparing the experimental production and characterization with the simulation (molecular dynamics and hybrid molecular dynami...
A geotecnia na transição eco-digital das infraestruturas de transporte
Neves, José; Moutinho, João; Freire, Ana Cristina; Paixão, André; Monteiro, Bernardo; Parente, Manuel; Cristelo, Nuno; Correia, A. GomesO artigo apresenta uma compilação de exemplos nacionais de investigação, desenvolvimento e inovação relacionados com a transição verde e a transformação digital no âmbito da geotecnia nos transportes e associados às terraplenagens, pavimentos e vias-férreas. No âmbito da transição verde, são apresentados exemplos de aplicação de materiais não convencionais e renováveis e de técnicas de estabilização baseadas na...
Sickle cell disease: Clinical and sociodemographic characteristics of children ...
Mendes, Inês; Costa, Adriana; Lage, Joana; Monteiro, Bernardo; Ferreira, Teresa; Loureiro, HelenaIntroduction: The global incidence of sickle cell disease (SCD) is approximately 300.000 births per year, and the condition is associated with significant morbidity and mortality in pediatric age. This study aimed to describe the sociodemographic and clinical characteristics of children up to five years of age with SCD in a Portuguese center. Methods: This was a descriptive retrospective study of children aged ...
Lanthanide-based complexes as efficient physiological temperature sensors
Monteiro, Bernardo; Leal, João Paulo; Mendes, Ricardo F.; Almeida Paz, Filipe A.; Linden, Anthony; Smetana, Volodymyr; Mudring, Anja V.; Avó, JoãoA new molecular thermometric sensor based on the terbium(III) complex [C2mim][Tb(fod)4] (C2mim – 1-methyl-3-ethylimidazolium, fod− - tetrakis-6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedionate), doped with 0.015% of its europium(III) analogue (1, [C2mim][Tb(fod)4]0.99985:[C2mim][Eu(fod)4]0.00015), was prepared and its thermochromic behaviour evaluated from ambient temperature up to 75 °C, including in the...
Multifunctionality of the [C2mim][Ln(fod)4] series (Ln = Nd-Tm except Pm): magn...
Cerdeira, Ana C.; Leal, João P.; Avó, João; Viola, Catarina; Casimiro, Maria H.; Ferreira, Luis M.; Almeida Paz, Filipe A.; Pereira, Laura C. J.A series of nine tetrakis lanthanide β-diketonate complexes of the type [C2mim][Ln(fod)4] (C2mim = 1-ethyl-3-methylimidazolium, fod = 6,6,7,7,8,8,8-heptafluoro-2,2-dimethyl-3,5-octanedionate) were prepared, with yields above 80%, and their thermochemical, photophysical and magnetic susceptibilities were evaluated. Thermochemical studies presented a rare and reversible conversion between two solid phases (polymo...
Metal-organic frameworks based on uranyl and phosphonate ligands
Monteiro, Bernardo; Fernandes, Jose A.; Pereira, Claudia C. L.; Vilela, Sergio M. F.; Tome, Joao P. C.; Marcalo, Joaquim; Almeida Paz, Filipe A.Three new crystalline metal-organic frameworks have been prepared from the reaction of uranyl nitrate with nitrilotris(methylphosphonic acid) [H(6)nmp, N(CH2PO3H2)(3)], 1,4-phenylenebis(methylene)diphosphonic acid [H(4)pmd, C6H4(PO3H2)(2)], and (benzene-1,3,5-triyltris(methylene))triphosphonic acid [H(6)bmt, C6H3(PO3H2)(3)]. Compound [(UO2)(2)F(H(3)nmp)(H2O)]center dot 4H(2)O (I) crystallizes in space group C2/...
Synthesis and catalytic properties in olefin epoxidation of octahedral dichlori...
Gago, Sandra; Neves, Patrícia; Monteiro, Bernardo; Pessêgo, Márcia; Lopes, Andre D.; Valente, Anabela A.; Almeida Paz, Filipe A.; Pillinger, MartynThe catalytic performance of the complexes [MoO2Cl2(L)2][L = N,N-dimethylformamide (dmf), N,N-dimethylacetamide(dma), N,N-dimethylpropionamide (dmpa), N,N-diethylformamide(def) and N,N-diphenylformamide (dpf)] was examined in the epoxidation of cis-cyclooctene with tert-butyl hydroperoxide(tbhp) at 55 °C and in the absence of a cosolvent.The complexes showed high turnover frequencies in the range of 561–577 mol...
Comparison of liquid-phase olefin epoxidation catalysed by dichlorobis-(dimethy...
Monteiro, Bernardo; Balula, Salete S.; Gago, Sandra; Grosso, Carla; Figueiredo, Sónia; Lopes, Andre D.; Valente, Anabela A.; Pillinger, MartynA mesoporous silica-supported molybdenum oxide catalyst with a loading of 0.17Mo/nm2 was prepared by liquid phase deposition ofMoO2Cl2(dmf)2 (1) onto MCM-41 (dmf = dimethylformamide). Powder X-ray diffraction and N2 adsorption studies of Mo-MCM-41 indicate that the texture properties of the support were preserved during the grafting experiment. On the basis of evidence from FTIR spectroscopy, 13C and 29Si MAS N...