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Use of new silica fillers as additives for polymers used in packaging of fruit
(Sociedade Brasileira de Química, 2012-09-28)
The objective of this work was to synthesize nanosilicas with different degree of hydrophobicity by the sol-gel method, using tetraethyl orthosilicate as a precursor. For this purpose, 3-aminopropyl triethoxysilane (APS) ...
Aplicação de amido oxidado de mandioca como ingrediente em panificação
(Universidade Tecnológica Federal do ParanáCampo Mourao, 2013-04-23)
The bread is obtained by cooking the dough fermented flour. To improve the performance of flour some additives such as emulsifiers, oxidants and enzymes may be added. The aim of this study was to use cassava starch oxidized ...
Estudio de los cambios físicos y químicos de la gulupa (Passiflora edulis Sims fo. edulis) durante la maduración
(2010)
Se estudiaron las características físicoquímicas de la gulupa en tres estados de madurez. El pH y los sólidos solubles totales incrementaron durante el proceso de maduración, mientras que la acidez titulable disminuyó. La ...
Ammonia and nitrous oxide emissions as affected by nitrification and urease inhibitors
(2018)
Soil Nitrogen (N) gaseous losses have environmental and economic implications. Ammonia (NH3) volatilization and nitrous oxide (N2O) emissions from a volcanic soil were concurrently quantified using intact lysimeters. after ...
Phytochemical studies and hypoglycemic activity of extracts from Gleichenia squamulosa (Pteridophyta)
(2017)
Ferns have been used for ornamental purposes as well as for medicinal purposes. Accordingly, the
production of secondary metabolites with various biological activities could be useful in the
treatment of various diseases. ...
Combustion of diesel soot in NO/O2 presence. Cesium nitrate and gold catalysts
(Elsevier Science, 2011-01-29)
The diesel soot combustion was studied using catalysts prepared by impregnation with cesium nitrate and/or gold on zirconium oxide (ZrO2), hydrated zirconium oxide and silica (SiO2). Catalysts were characterized by ...
Disfunção na atividade da citocromo c oxidase (Cox) mitocondrial na doença de Alzheimer: revisão sistemática e metanálise
(Universidade Federal de Minas GeraisUFMG, 2018-03-08)
Introduction: There is evidence that the impairment of mitochondrial functions may contribute to damages in synapses and neurodegeneration, observed in Alzheimer's disease (A.D.). Neurodegeneration may be related to changes ...
Color and structural analysis of CoxZn7-xSb2O12 pigments
(Elsevier B.V., 2006-11-09)
The polymeric precursor method was successfully used to synthesize CoxZn7-xSbO12 (x = 0-7) powders. Pigments were evaluated using colorimetry, X-ray diffraction, UV-vis and infrared spectroscopy. The optical band gap values ...
Black and green pigments based on chromium-cobalt spinels
(Elsevier B.V. Sa, 2011-09-15)
Chromium and cobalt oxides are widely used in the manufacture of industrial pigments. In this work, the Co(Co(2-x)Cr(x))O(4) powders with different chromium concentrations (x = 0, 0.25 and 1) were synthesized by the polymeric ...
Método colorimétrico para determinação de dióxido de nitrogênio atmosférico com preconcentração em coluna de c-18
(Sociedade Brasileira de Química, 2002-05-01)
An alternative analytical method for nitrogen dioxide (NO2) in atmosphere was developed. The collection of NO2 is performed by a Sep-Pack C-18 cartridge impregnated with 11% (v/v) of triethanolamine plus 3,6 % (v/v) of ...