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Mostrando ítems 21-30 de 161
Estudo de fotoestabilidade de 1,4-dihidropiridinas por incorporação em sistemas macrocíclicos
(2020)
Esta dissertação desenvolve os tópicos de síntese orgânica, catálise heterogênea, fotofísica/fotoquímica orgânica e química supramolecular. Inicialmente, compostos contendo o núcleo 1,4-dihidropiridina foram sintetizados ...
Estruturas core@shell NiFe2O4@TiO2-Fe aplicadas na degradação fotocatalítica de glifosato em meio aquoso
(Universidade Tecnológica Federal do ParanáPato BrancoBrasilDepartamento Acadêmico de QuímicaQuímicaUTFPR, 2021-11-29)
Glyphosate is currently considered the main agricultural input sold in Brazil and worldwide. Despite being considered low toxic, the intensive use of glyphosate and glyphosate-based herbicides can compromise the soil and ...
On spin hamiltonian fits to Mössbauer spectra of NiFe2O4 nanoparticles synthesized by co-precipitation
(Universidade Federal de Minas GeraisBrasilICA - INSTITUTO DE CIÊNCIAS AGRÁRIASUFMGArtemis, 2021)
Preparation of nanostructured NiFe2O4 catalysts by combustion reaction
(2006)
Nanosize nickel ferrite powders (NiFe2O4) have been prepared by combustion reaction using nitrates and urea as fuel. The resulting powders were characterized by X-ray diffraction (XRD), nitrogen physical adsorption (BET), ...
Electrical and magnetic response of a phosphate glass - NiFe2O4 composite: A novel magnetic sensor design
(MedCrave, 2019-01-29)
NiFe2O4 spinel – phosphate (Bi-Ba-Li) glass composite was synthesized by solid-state reaction. New crystalline magnetic phases was developed inside the glassy matrix through a controlled heat treatment. New NF-LBPB4 magnetic ...
Magnetic hysteresis loop shift in NiFe(2)O(4) nanocrystalline powder with large grain boundary fraction
(ELSEVIER SCIENCE BV, 2010)
Magnetic properties of nanocrystalline NiFe(2)O(4) spinel mechanically processed for 350 h have been studied using temperature dependent from both zero-field and in-field (57)Fe Mossbauer spectrometry and magnetization ...