Results 51 to 60 of about 246,176 (312)

Dynamics of Anisotropic Universes

open access: yes, 2005
We present a general study of the dynamical properties of Anisotropic Bianchi Universes in the context of Einstein General Relativity. Integrability results using Kovalevskaya exponents are reported and connected to general knowledge about Bianchi ...
Perez, Jerome
core   +3 more sources

Chiral Nanohoops as an Efficient Spin Polarization System

open access: yesAdvanced Functional Materials, EarlyView.
Chiral conjugated nanohoops with a central dibenzopentalene unit exhibit 90% spin polarization at low voltage and high conductivity. These properties make them ideal components in molecular spintronics applications. Abstract A central challenge in molecular spintronics is to achieve a high spin polarization at low operating voltages and ambient ...
Anu Gupta   +4 more
wiley   +1 more source

Chiral SURMOFs for Vibrational Circular Dichroism: Multiscale Modeling and Experimental Insights

open access: yesAdvanced Functional Materials, EarlyView.
The use of solid‐state vibrational circular dichroism (VCD) for MOFs is still somewhat unexplored, and in this work, it is shown that chiral surface‐anchored MOFs (SURMOFs) grown on CaF2 provide an excellent platform for VCD. Experimental results are validated through multiscale modeling, showing strong agreement across multiple spectroscopic ...
Ana C. Fingolo   +9 more
wiley   +1 more source

Evaluation of three methods for hemoglobin measurement in a blood donor setting

open access: yesSão Paulo Medical Journal, 1999
CONTEXT: The hemoglobin (Hb) level is the most-used parameter for screening blood donors for the presence of anemia, one of the most-used methods for measuring Hb levels is based on photometric detection of cyanmetahemoglobin, as an alternative to this ...
Jacob Rosenblit   +7 more
doaj   +1 more source

Transition From Lattice Oxygen to Radical‐Mediated Oxidation in Ammonium‐Intercalated Birnessite Catalysts for Selective Valorization of Biomass to Produce Formic Acid

open access: yesAdvanced Functional Materials, EarlyView.
The catalytic valorization of biomass represents an essential approach for achieving sustainable chemical production, with formic acid (FA) being recognized as a valuable platform chemical for hydrogen storage and environmentally friendly synthetic applications.
Yiqi Geng   +6 more
wiley   +1 more source

Efeito da implementação de um protocolo assistencial de infarto agudo do miocárdio sobre os indicadores de qualidade

open access: yesEinstein (São Paulo), 2013
OBJETIVO: Avaliar a adesão aos indicadores de qualidade assistencial ao longo da implementação de um protocolo assistencial de infarto agudo do miocárdio.
Marcia Makdisse   +13 more
doaj  

Avaliação prognóstica do tromboembolismo pulmonar por ecocardiograma com Doppler tecidual e peptídeo atrial natriurético tipo B

open access: yesEinstein (São Paulo)
OBJETIVO: Avaliar o prognóstico do tromboembolismo pulmonar usando o ecocardiograma com Doppler tecidual e o peptídeo atrial natriurético. MÉTODOS: Pacientes com idade acima de 18 anos foram avaliados pelo ecocardiograma bidimensional e Doppler tecidual ...
Ana Clara Tude Rodrigues   +8 more
doaj   +1 more source

Sobre les teories especial i general de la relativitat [PDF]

open access: yes, 2014
Una perspectiva de la teoria de la relativitat per als que no dominen l'aparell matemàtic de la fí ...
Albert Einstein
core   +1 more source

Cactus: Issues for Sustainable Simulation Software

open access: yes, 2013
The Cactus Framework is an open-source, modular, portable programming environment for the collaborative development and deployment of scientific applications using high-performance computing.
Allen, Gabrielle   +3 more
core   +2 more sources

Unravelling the Atomic Structure of a Metal‐Covalent Organic Framework Assembled from Ruthenium Metalloligands

open access: yesAdvanced Materials, Volume 37, Issue 13, April 2, 2025.
Metal‐covalent organic frameworks (MCOFs) are novel porous materials that exhibit the advantages of covalent and metal‐organic frameworks. However, it is extremely difficult to resolve their atomic structure and better understand their structure‐properties relation. This work utilizes a synergistic combination of advanced microscopy, spectroscopic, and
Seán Hennessey   +11 more
wiley   +1 more source

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