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Espectroscopia no infravermelho próximo para estimativa dos teores de argila e de matéria orgânica em amostras de solo
(Universidade Federal de Santa MariaBrasilAgronomiaUFSMPrograma de Pós-Graduação em Ciência do SoloCentro de Ciências Rurais, 2019-07-19)
Among the constituents of the soil, special attention is given to soil clay and soil organic matter (SOM), since, among other aspects, they are determinant for nutrient retention and for the formation of aggregates, which ...
Monitoramento em tempo real da hidrólise enzimática do bagaço da casca de coco verde por espectroscopia no infravermelho próximo (NIRS)
(BrasilUFRNPROGRAMA DE PÓS-GRADUAÇÃO EM ENGENHARIA QUÍMICA, 2016-06-29)
This study investigates the application of near infrared spectroscopy for rapid qualitative characterization of coconut husk fiber and evaluates the potential of this lignocellulosic material for producing second-generation ...
Development of Calibration Models to Predict Mean Fibre Diameter in Llama (Lama glama) Fleeces with Near Infrared Spectroscopy
(MDPI, 2021-07)
Llama fibre has the potential to become the most valuable textile resource in the Puna region of Argentina. In this study near infrared reflectance spectroscopy was evaluated to predict the mean fibre diameter in llama ...
Study of matrix effects and spectral interferences in the determination of lead in sediments, sludges and soils by SR-ETAAS using slurry sampling
(Elsevier Science, 2010-07)
An interference-free, fast, and simple method is proposed for Pb determination in environmental solid samples combining slurry sampling and electrothermal atomic absorption spectrometry. Samples were ground to an adequate ...
Utilización de Quimiometría para Mejorar el Rendimiento de la Cromatografía Líquida de Alta Resolución. Aplicación a la Determinación de Sustancias de Interés Biológico en Muestras de Composición Compleja
(2011-08-26)
En esta tesis se utilizaron diversas herramientas quimiométricas para alcanzar mejoras significativas en el rendimiento de la cromatografía líquida acoplada a detectores de arreglo de diodo y de fluorescencia. En primer ...
Investigation of spectral interference in the determination of Pb in road dust using high-resolution continuum source graphite furnace atomic absorption spectrometry and direct solid sample analysis
(Royal Society of Chemistry, 2018-04)
Direct solid sample analysis using graphite furnace atomic absorption spectrometry (GF AAS) is an attractive alternative because no sample pretreatment is necessary. However, the major obstacles of this technique are ...
Gastric anti-ulcer activity of leaf fractions obtained of polar extract from Wilbrandia ebracteata in mice
(TAYLOR & FRANCIS LTD, 2009)
Leaf fractions of Wilbrandia ebracteata were investigated for anti-ulcerogenic effects in ethanol and indomethacin-induced gastric ulcer assays in mice. Protective anti-ulcer effects were detected only in the ethanol-induced ...
Gastric anti-ulcer activity of leaf fractions obtained of polar extract from Wilbrandia ebracteata in mice
(Taylor & Francis Ltd, 2009-01-01)
Leaf fractions of Wilbrandia ebracteata were investigated for anti-ulcerogenic effects in ethanol and indomethacin-induced gastric ulcer assays in mice. Protective anti-ulcer effects were detected only in the ethanol-induced ...