Results 21 to 30 of about 28,259 (157)
Producción de óxido de grafeno directamente desde un blanco de grafito sin catalizador usando láser pulsado [PDF]
En este trabajo se explica la forma en que fueron sintetizadas y caracterizadas películas delgadas de Óxido de Grafeno (GO por sus siglas en inglés Graphene Oxide), depositadas mediante la técnica de ablación láser. El GO es un material que hace parte de
Cuenca Vargas, Juan Pablo +1 more
core +3 more sources
A Mini Atlas of H-Band Spectra of Southern Symbiotic Stars
Symbiotic stars are interacting binary systems composed of an evolved star (generally a late-type red giant) and a degenerate or dwarf companion in orbit close enough for mass transfer to occur. Understanding the status of the late-type star is important
Paula Esther Marchiano +6 more
doaj +1 more source
Biofilms in milking equipment on dairy farms have been associated with failures in cleaning and sanitizing protocols. These biofilms on milking equipment can be a source of contamination for bulk tank milk and a concern for animal and public health, as ...
Alejandra A. Latorre +7 more
doaj +1 more source
Se presenta un estudio espectroscópico computacional del ibuprofeno y sus precursores químicos isobutilbenceno y 4-isobutilacetofenona. En la investigación se utilizó el programa de modelamiento electrónico estructural GAUSSIAN 03.
Lorena Meneses
doaj +4 more sources
Contributions of new MRI techniques to brain tumor diagnosis. University Hospital experience.
Magnetic resonance imaging (MRI) is the preferred imaging technique for central nervous system tumor analysis. A great variety of tumors can be found in the brain and establishing a definitive diagnosis is a difficult task that often requires a ...
Nicolás Sgarbi, Osmar Telis
doaj +2 more sources
Dada la importancia del medicamento denominado teofilina para su uso en pacientes con problemas de asma y su alto consumo en Costa Rica, se eligió el producto en tabletas de 150 mg de teofilina de una casa farmacéutica que lo produce y distribuye en ...
Esteban Pérez-López +3 more
doaj +1 more source
Estudio computacional de RMN del acetaminofén y sus precursores químicos
En este artículo, se presenta un estudio espectroscópico computacional de Resonancia Magnética Nuclear del acetaminofén y sus principales precursores químicos: el 4-nitrofenol y el 4-aminofenol.
Sebastian Cuesta +2 more
doaj +1 more source
Steady state free precession (SSFP) – Complete Reduction to Amplitude Frequency Tables (CRAFT) not only improves sensitivity, resolution and number of signals detected by NMR but can also dramatically reduce experiment times. This powerful approach unlocks the potential of NMR as a discovery tool, enabling unprecedented detection of fluorinated ...
Jeremy R. Gauthier +10 more
wiley +2 more sources
ON THE [ArIV]/[ArIII] LINE RATIO IN PLANETARY NEBULAE
Estudios espectroscópicos anteriores de las nebulosas planetarias han demostrado que la razón de línea [ArIV] / [ArIII] observada no es reproducida por los modelos de fotoionización.
R. E. Carlos Reyes +2 more
doaj +1 more source
Red wine contains polyphenols which are extracted during the winemaking process. However, winemaking is not an extraction; therefore, the resulting byproducts still have a substantial polyphenol content.
Tellez-Robles Daniela +6 more
doaj +1 more source

