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Now showing items 2341-2350 of 2620
Friction improvement via grinding wheel texturing by dressing
(Springer, 2020-05-20)
The economic and environmental cost of friction in machinery and transport is significantly remarkable, the machine tool being one of the most affected. In this sector, the movements are fully affected by the friction ...
Fully anisotropic superconductivity with few Helmholtz Fermi-surface harmonics
(American Physical Society, 2020-10-09)
We present an alternative representation for the anisotropic Eliashberg equations of superconductivity, whose numerical solution yields an efficiency gain of several orders of magnitude with respect to the conventional ...
Green and blue settings as providers of mental health ecosystem services: Comparing urban beaches and parks and building a predictive model of psychological restoration
(Elsevier, 2020-08-28)
Urban beaches and parks are providers of numerous ecosystem services. In the cultural sphere, place bonding
and psychological restoration might significantly contribute to the health and well-being of citizens. In ...
Enhancing the CO2 methanation activity of γ-Al2O3 supported mono- and bi-metallic catalysts prepared by glycerol assisted impregnation
(Elsevier B.V., 2021-11)
Conventional Ni/Al2O3 catalyst, currently used for COx removal in ammonia production, admits room for improvement as catalysts for application in low temperature CO2 methanation, which is the aim of this work. The Incipient ...
Enhancing biochar redox properties through feedstock selection, metal preloading and post-pyrolysis treatments
(Elsevier, 2020-09-01)
There is growing evidence on the importance of the redox properties of biochar for many environmental applications. However, its variability and the difficulty in controlling its redox properties could be delaying the use ...
Improving energy poverty measurement in Southern European Regions through equivalisation of theoretical energy costs
(2020-07-16)
In many European countries, energy poverty is measured on the basis of real energy bills, as theoretical energy costs are hard to calculate. The UK is an exception—the data inputs for the Low Income-High Cost (LIHC) indicator ...
Influence of Thermally-Induced Structural Transformations over Magnetic and Luminiscence Properties of Tartrate-based Chiral Lanthanide Organic-Frameworks
(RSC, 2020-05-04)
This work reports on the synthesis and characterization of five enantiomeric pairs of isostructural 3D metal-organic
frameworks (MOFs) with the general formula {[Ln2(μ4-tar)2(μ-tar)(H2O)2]·xH2O}n [where Ln(III) = Tb (Tb-L ...
Influence of Lewis acidity and CaCl2 on the direct transformation of glucose to 5-hydroxymethylfurfural
(Elsevier, 2021-06-11)
[EN] Nb-Zr oxides were evaluated for glucose dehydration to 5-hydroxymethylfurfural. A linear relationship was found between the amount of acid sites and niobium content. Pure Nb2O5 showed the highest acid concentration ...
Kinetic modeling of CO2 + CO hydrogenation to DME over a CuO-ZnO-ZrO2@SAPO-11 core-shell catalyst
(Elsevier, 2020-09-01)
A kinetic model for the CO2 + CO hydrogenation to dimethyl ether (DME) in a single step over an original core-shell structured CuO-ZnO-ZrO2@SAPO-11 bifunctional catalyst (metallic in the core and acid in shell) has been ...
Extraction of flavonoid compounds from bark using sustainable deep eutectic solvents
(Elsevier, 2021-12)
[EN] The use of green solvents in extraction processes, especially for applications of lignocellulosic biomass, has been extensively studied over the last years. Among the range of different green solvents, deep eutectic ...