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Eficiência e seletividade de diferentes métodos de extração, purificação e detecção de histamina e tiramina em queijo ralado
(Universidade Federal de Minas GeraisUFMG, 2006-09-26)
Efficiency and selectivity of different methods of extraction, purification and detection of histamine and tyramine in grated cheese. The aim of this work was to evaluate the efficiency and selectivity of extraction, ...
A contribution to the physicochemical characterization of nonstoichiometric salts of tungstosilicic acid
(Elsevier Science, 2007-06)
Nonstoichiometric cesium and rubidium salts of tungstosilicic acid (TSA) were synthesized by precipitation. These solids are insoluble in water, due to the low solvation energy of large cations, have high specific surface ...
Surface charge effects on the redox switching of LbL self-assembled redox polyelectrolyte multilayers
(Elsevier Science Sa, 2007-01-15)
The effect of surface charge on the electron transfer and charge propagation in layer by layer (LbL) electrostatically self-assembled redox poly-electrolyte multilayers (PEMs) has been studied. Thin films comprised of ...
Intermolecular vibrations and fast relaxations in supercooled ionic liquids
(AMER INST PHYSICS, 2011)
Short-time dynamics of ionic liquids has been investigated by low-frequency Raman spectroscopy (4 < omega < 100 cm(-1)) within the supercooled liquid range. Raman spectra are reported for ionic liquids with the same anion, ...
Microphase separation and aggregate self-assembly in brushes of oppositely charged polyelectrolytes triggered by ion pairing
(American Institute of Physics, 2020-10)
This work applies a molecular theory to study the formation of lateral self-assembled aggregates in mixed brushes composed of polyanion and polycation chains. In order to overcome the well-known limitations of mean-field ...
Estudio de la influencia de la composición química y el proceso de síntesis en las propiedades fisicoquímicas de hidróxidos dobles laminares y sus derivados
(Universidad Autónoma Metropolitana (México). Unidad Azcapotzalco. Coordinación de Servicios de Información., 2014-12)
El presente trabajo resume diversos estudios realizados sobre la familia de materiales conocida como hidróxidos dobles laminares (LDHs por sus siglas en inglés) con el fin de entender y modular sus propiedades fisicoquímicas. ...
Polyelectrolyte complexes for assisting the application of lignocellulosic micro/nanofibers in papermaking
(Springer, 2018-08)
A novel procedure based on the addition of polyelectrolyte complexes (PECs) onto the pulp containing lignocellulosic micro/nanofibers (LCMNF) is presented. This procedure allows increasing paper strength avoiding an excessive ...
Aplicação de sistemas microemulsionados como colchão lavador para remoção do reboco de fluido de perfuração não aquoso
(BrasilUFRNPROGRAMA DE PÓS-GRADUAÇÃO EM QUÍMICA, 2019-07-26)
When drilling wells for oil extraction, special purpose drilling fluids are used, including
the formation of a low permeability thin film (filter cake) on the well walls. However,
removal of the filter cake is necessary ...
Imim-DEHP reverse micelles investigated with two molecular probes reveals how are the interfacial properties and the coordination behavior of the surfactant
(Elsevier Science, 2020-09)
Aqueous reverse micelles (RMs) generated with the ionic liquid (IL)-surfactant 1-methylimidazolium bis-(2-ethylhexyl)phosphate (imim-DEHP) and the biocompatible solvents methyl laurate (ML) and isopropyl myristate (IPM) ...
Synthesis, crystal structure and magnetic properties of diaquabis(2,6-diamino-7H-purin-1-ium-kappa N-9)bis(4,4 '-oxydibenzoato-kappa O)cobalt(II) dihydrate
(International Union of Crystallography, 2018)
The title mononuclear Co-II complex, [Co(C5H7N6)(2)(C14H8O5)(2)(H2O)(2)]center dot 2H(2)O, has been synthesized and its crystal structure determined by X-ray diffraction. The complex crystallizes in the triclinic space ...