Buscar
Mostrando ítems 1-10 de 66
Calcium citrate insolubilization drives the fouling of falling film evaporators during the concentration of hydrochloric acid whey
(Food Research International, 2019)
The thermal, rheological and structural properties of cassava starch granules modified with hydrochloric acid at different temperatures
(2013-01-20)
Starch is arguably one of the most actively investigated biopolymer in the world. In this study, the native (untreated) cassava starch granules (Manihot esculenta, Crantz) were hydrolyzed by standard hydrochloric acid ...
Determination of cadmium in river water samples by flame AAS after on-line preconcentration in mini-column packed with 2-aminothiazole-modified silica gel
(2004-07-01)
A rapid and sensitive method was developed to determine trace levels of Cd2+ ions in an aqueous medium by flame atomic absorption spectrometry, using on-line preconcentration in a mini-column packed with 100 mg of ...
Effects of HCl on the ultrasound catalyzed TEOS hydrolysis as determined by a calorimetric study
(1996-11-01)
The acid catalyzed and ultrasound stimulated hydrolysis of solventless tetraethoxysilane-water mixtures was studied at 39°C as a function of HCl added to the mixtures (log[HCl]-1 ranged from 0.8 to 2.0), The reaction was ...
Characterization and in vitro cytocompatibility of an acid-etched titanium surface
(2010-01-01)
The aims of this study were to characterize the microstructure of a commercially pure titanium (cpTi) surface etched with HCl/H 2SO 4 (AE-cpTi) and to investigate its in vitro cytocompatibility compared to turned cpTi ...
Determination of mercury in agroindustrial samples by flow-injection cold vapor atomic absorption spectrometry using ion exchange and reductive elution
(2000-03-06)
A flow-injection system with a Chelite-S® cationic resin packed minicolumn is proposed for the determination of trace levels of mercury in agroindustrial samples by cold vapor atomic absorption spectrometry. Improved ...
Determination of Cu, Ni and Pb in Aqueous Medium by FAAS after Pre-Concentration on 2-Aminothiazole Modified Silica Gel
(2004-08-30)
This work describes the synthesis and characterization of 2-aminothiazole modified silica gel (SiAT), and the results of a study of the adsorption and pre-concentration (in batch and using a flow-injection system coupled ...
Specific depth cone resistivity measurements to determine soil engineering properties
(2003-03-01)
The University of British Columbia (UBC) began performing piezocone penetration tests (CPTU) with electrical resistivity measurements (RCPTU) in 1989. Since then, RCPTU research at UBC has focused on obtaining geo-environmental ...
Análise quantitativa de fluoretos nos alginatos para uso odontológico
(2005-12-01)
In this study, the aim was to measure the concentration of fluoride ions in dental alginates and the quantity released from alginate molds immersed in milliQ water, 0.1N hydrochloric acid and artificial saliva. Two separate ...
Influence of the use of acids and films in post-harvest lychee conservation
(Revista Ceres, 2018)