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Determination of the betaine content of feed ingredients using high-performance liquid chromatography
(Wiley-Blackwell, 2002-10-01)
A series of studies was conducted to establish a methodology for the accurate and efficient determination of betaine in different feed ingredients. The final methodology involves an extraction step in which the feed sample ...
Luminescence in semi-crystalline zirconium titanate doped with lanthanum
(Elsevier B.V., 2006-10-25)
This paper aims to describe the synthesis of the semi-crystalline and crystalline powder of lanthanum doped with zirconium titanate (65/35), LZT through Pechini method. The analysis done by Raman demonstrated that ...
A model for the Schottky anomaly in metallic Nd2-yCeyCuO4
(Elsevier B.V., 1998-12-20)
We present a simple model for the doped compound Nd2-yCevCuO4, in order to explain some recent experimental results on the latter. Within a Hartree-Fock context, we start from an impurity Anderson-like model and consider ...
Determination of the local site occupancy of Eu3+ ions in ZnAl2O4 nanocrystalline powders
(Elsevier B.V., 2011-06-01)
Once lanthanides-doped ZnAl2O4 have attracted attention for highly efficient phosphors and due to the complexity of this system, this work is focused in the understanding of the local site occupancy of the doped ions in ...
Yellow ZnxNi1-xWO4 pigments obtained using a polymeric precursor method
(Elsevier B.V., 2008-01-01)
New tungstate-based ceramic pigments, displaying ZnxNi1-xWO4 stoichiometry, were obtained at low temperature using a polymeric precursor method. The powder precursors were milled in an attritor mill in an alcoholic rnedium ...
Geochemical Study of the Itabirite Iron Ores of the Alegria Mine - Quadrilátero Ferrífero, Minas Gerais, Brazil
(2002-12-01)
The iron ores of Alegria mine are composed of itabirites enclosing minor bodies of high-grade ores. The itabirites are classified according to mineralogical composition in five types: martite-rich, goethite-rich, ...
Desenvolvimento de um colorímetro in-line para o monitoramento da extrusão de polímeros
(Universidade Federal de São CarlosUFSCarPrograma de Pós-Graduação em Ciência e Engenharia de Materiais - PPGCEMCâmpus São Carlos, 2014-01-30)
This work shows the development, construction, validation and application of an in-line colorimeter used for real time color quantification of the melted flow during polymer processing in the extruder. The device uses a ...
Introductory chapter : application of optical fiber for sensing
(IntechOpen, 2019)
1. Introduction
The history of the use of optical fiber for sensing applications began with two
different, but interrelated, discoveries: laser light and optical fibers. The first laser
was built in 1960 by T. H. Maiman ...
Morphology and properties of (Ba, Sr, Ca) titanates synthesized by microwave-assisted hydrothermal method
(2011)
Ba1-xCaxTiO3, Ba1-xSrxTiO3 and Sr1-xCaxTiO3 (x = 0, 0.25, 0.50, 0.75 and 1) nanoparticles were synthesized using the microwave-assisted hydrothermal method. Samples were prepared for 40 minutes at 140°C under a pressure ...
Zeolitisation of neogene sedimentary and pyroclastic rocks exposed in paipa (boyacá), in the colombian andes: simulating their natural formation conditions
(UNIVERSIDAD NACIONAL DE COLOMBIA, 2011)
The present study concerns the synthesis of zeolites from Neogene sedimentary and pyroclastic rocks exposed around the Sochagota Lake, Paipa (Boyacá). Two synthesis methods were used: conventional hydrothermal treatment ...