Results 141 to 150 of about 79,787 (286)

Determining Diffusion Coefficients in Polymer Electrolyte Membranes With Lab Based Micro X‐Ray Fluorescence Analysis: A Proof of Concept

X-Ray Spectrometry, EarlyView.
ABSTRACT The diffusion of metal ions in polymer electrolyte membranes is an important parameter for aging and capacity loss in electrochemical cells. Here, the diffusion coefficients of vanadium ions in Nafion membranes are studied. These are important to describe transportation of the ions through the membrane separator in vanadium redox flow ...
Frithjof Mähler, Sven Hampel, Ursula E. A. Fittschen   +2 more
wiley   +1 more source

Trace Element Analysis in Human Neuroblastoma Cell Spheroids Supplemented With ZnCl2 by Micro‐XRF

X-Ray Spectrometry, EarlyView.
ABSTRACT Neuroblastoma, the most common extracranial solid tumor of childhood, is responsible for ~10% of pediatric cancer deaths and has high potential for metastasis. Metals are extremely important in biological processes, and changes in their levels have been correlated with the development of cancerous growth.
J. E. P. Rosa, R. G. Leitão, G. C. Ferreira, C. Palmero, E. G. Oliveira‐Barros, M. A. Oliveira, C. G. L. Canellas, L. E. Nasciutti, D. F. Olivera, R. T. Lopes, M. J. Anjos   +10 more
wiley   +1 more source

Biocombustibles en la agricultura: carácter renovable y análisis de emisiones [PDF]

, 2008
El uso de biocombustibles parece ser un factor importante de cara a retrasar el agotamiento de combustibles fósiles. En este trabajo se realiza una revisión de estudios de investigación muy recientes relacionados con el carácter renovable de la ...
Barreiro Elorza, Pilar, Cid, P., Zapata, A.   +2 more
core  

Spectromicroscopy Analysis of Chicken Egg Shells

X-Ray Spectrometry, EarlyView.
ABSTRACT Chicken egg shells, taken from farm and backyard eggs of different suppliers from different regions in Brazil were collected for chemical/structural analysis, in order to try to find if there is a relation between egg shells composition and the type of production (farm or backyard), the egg shell color and the region of production.
Mariana Muniz Delgado Lopes, Sandy Gonzalez Hernandez, Luana Estefani Knaul, Rodrigo Leonardo de Oliveira Basso, Marcelo G. Hönnicke   +4 more
wiley   +1 more source

Síntesis emergética como herramienta de comparación entre dos sistemas de producción agrícola argentinos : chaco seco y pampa ondulada [PDF]

, 2016
El sistema agropecuario en Argentina fue uno de los principales motores de transformación de los ecosistemas nativos, constituyéndose en una importante actividad económica.
Totino, Mariana
core   +2 more sources

Integrated X‐Ray, Gamma Radiation, and Micro‐CT Techniques for Quantitative Wood Characterization

X-Ray Spectrometry, EarlyView.
ABSTRACT The present research integrates microcomputed tomography (micro‐CT), x‐ray fluorescence, and gamma‐ray transmission to quantitatively characterize wood species. A total of 22 samples from seven species were analyzed for density (ρ), linear attenuation coefficient (μ), Compton scattering, micro‐CT gray values (GV), porosity, mass attenuation ...
Roberta M. S. P. Borges, Josiane E. Cavalcante, Isis V. N. S. Franzi, Anderson G. Paula, Roberta G. Leitão, Marcelino José dos Anjos, Ricardo T. Lopes, Davi F. Oliveira   +7 more
wiley   +1 more source

[Leadership, social determinants of health and health equity: the case of Costa Rica]. [PDF]

Rev Panam Salud Publica, 2021
Campbell Barr E, Marmot M.
europepmc   +1 more source

XAHRM‐Lab First Results and πXRF First View of UFe4Al8 and UFe10Si2

X-Ray Spectrometry, EarlyView.
ABSTRACT Following the installation of the Laboratory for the Characterization and Speciation of Aerosols (LCEA) in 2008, and the confirmation of High Resolution Energy Dispersive Spectrometry (HiREDS) as a much promising development for X‐ray Emission Spectrometry in general and Particle Induced X‐ray Emission (PIXE) in particular, the installation of
M. A. Reis, P. C. Chaves, A. P. Gonçalves, A. G. Karydas   +3 more
wiley   +1 more source

Análisis de factibilidad de un proyecto de autogeneración eléctrica fotovoltaica en Colombia para áreas productivas menores de 10.000 m² [PDF]

, 2017
La energía solar fotovoltaica es reconocida a nivel mundial como una fuente renovable, con bajo impacto ambiental y con costos menores comparados con otras fuentes de energía -- A nivel de Colombia, las condiciones geográficas son favorables para esta ...
Carmona Valencia, Hernán, Higuera Aguilar, Luis Hernando   +1 more
core  

Identifying Causes of Reproductive Failure in Zoo‐Housed Bush Dogs (Speothos venaticus) to Improve Ex Situ Management

Zoo Biology, EarlyView.
We distributed a survey to global institutions housing bush dogs (Speothos venaticus) to collect data on factors which may affect litter survival. Information from the Zoological Information Management System (ZIMS) and studbook records supplemented this dataset. We found that within northern temperate regions, the number of pups reared to the age of 1
Alice S. Clark, Veronica B. Cowl, Jane L. Hurst, Lisa Holmes, Paula Stockley   +4 more
wiley   +1 more source