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Mostrando ítems 491-500 de 633
Artículo
Effect of macular pigment carotenoids on cognitive functions
(Elsevier, 2022-06-23)
Lutein and zeaxanthin—xanthophyll carotenoids with antioxidant and anti-inflammatory characteristics—are present in the retina and the brain. High concentrations of these carotenoids have been positively related to cognitive ...
Artículo
Correlated atomic motions in glassy selenium
(American Institute of Physics Publising LLC, 1994)
The elastic and total (energy-integrated) structure factors for glassy selenium have been measured by means of neutron spectroscopy within the temperature range 15 KT310 K. The correlated nature of the atomic vibrations ...
Artículo
X-ray Structure and Molecular-Packing Analysis of a Glucofuranosoimidazolidine- 2-thione
(International Union of Crystallography, 1986)
1-(4-Bromophenyl)-3-ethyl-(3,5,6-tri-Oacetyl- 1,2-dideoxy-~t-L-glucofuranoso)[2,1-d]imidazolidine- 2-thione,* C21H25BrN2OTS, M,= 529.40, orthorhombic, P2~2121, a= 12.056 (7), b= 22.420 (9), c =8.841 (2)A, V=2390(2) A3, ...
Artículo
Comportamiento mecánico a alta temperatura de cerámicas de nitruro de silicio
(2001)
Se ha estudiado el comportamiento mecánico a alta temperatura de dos materiales cerámicos a base de nitruro de silicio: N n02, fabricado por sinterizado a baja presión con ytria, alúmina y magnesia como aditivos y N 3208, ...
Artículo
Artículo
Magnetocaloric effect and refrigerant capacity in Sr-doped Eu8 Ga16 Ge30 type-I clathrates
(AIP Publishing, 2010-04-19)
Magnetic properties, the magnetocaloric effect (MCE) and refrigerant capacity (RC) were investigated in Eu8Sr8−xGa16Ge30 (x=0,4) type-I clathrates. The substitution of Sr for Eu decreases the Curie temperature (TC) and ...
Artículo
Plastic deformation of CoO single crystals
(EDP Sciences, 1980)
Constant strain rate compressions along < 001 > have been performed on CoO single crystals (ε ∼ 6 x 10-5 s-1). Yield stresses and work hardening rates have been measured between 77 K and 1 400 K; CoO is very strong when ...
Artículo
Electrical Performance of Orthotropic and Isotropic 3YTZP Composites with Graphene Fillers
(Elsevier, 2022)
3 mol% yttria tetragonal zirconia polycrystal (3YTZP) composites with orthotropic or isotropic microstructures were obtained incorporating few layer graphene (FLG) or exfoliated graphene nanoplatelets (e-GNP) as fillers. ...
Artículo
Laser Dynamics from a Membrane Computing Perspective
(IMCS. International Membrane Computational Society, 2018)
Modelling real systems and processes is a task classically performed through the approach of di erential equation systems, de ning the evolution of di erent variables as the di erent components of the system. A bad feature ...
Artículo
A first insight into the microstructure and crack propagation in novel boron nitride nanosheet/3YTZP composites
(Sociedad Española de Cerámica y Vidrio, 2021)
In this work, novel 3mol% yttria tetragonal zirconia polycristalline (3YTZP) ceramic composites with boron nitride nanosheets (BNNS) are investigated for the first time. Highly densified composites with 1 and 4vol% BNNS ...