Now showing items 11-20 of 25
FURTHER INSIGHTS TOWARD VITAMIN C DETERMINATION AND STABILITY. PROPOSAL OF A NEW QUANTIFICATION METHOD
(UNIV FEDERAL UBERLANDIA, 2010)
This work aimed at an evaluation of the classical iodine method for quantification of vitamin C (L-ascorbic acid) in fruit juices, as well as at a search into the stability of this so popular vitamin under different ...
DFT Study of the Optical Properties and Substituent Effects in Macrosyclic Systems Formed by Metallo-Porphyrins for Their Potential Application in Solar Cells
Dye-sensitized solar cells (DSCs) were designed by Michael Grätzel. They have become as a promising inexpensive alternative to light-current conversion. Basically, DSCs are constituted by nanocrystalline films of a ...
Flow injection amperometric detection of ascorbic acid using a Prussian Blue film-modified electrode
(Elsevier B.V., 2001-08-30)
The PB film-modified electrode was used as an amperometric detector for flow injection analysis of ascorbic acid. The modified electrode detector showed good sensitivity, stability and reproducibility. The calibration curve ...
Stabilizing Dendron-modified Talc-based Electrolyte For Quasi-solid Dye-sensitized Solar Cell
(Pergamon-Elsevier Science LTDOxford, 2017)
Ring-opening polymerization of ε-caprolactone by iodine charge-transfer complex
(John Wiley & Sons Inc, 2002-12)
The ring-opening polymerization of ε-caprolactone (ε-CL) catalyzed by iodine (I2) was studied. The formation of a charge-transfer complex (CTC) among triiodide, I3-, and ε-CL was confirmed with ultraviolet-visible spectroscopy. ...
Flow-injection iodimetric determination of captopril in pharmaceutical preparations
(Sociedade Brasileira de Química, 2009)
A simple, fast and low cost procedure for spectrophotometric determination of captopril in pharmaceutical preparations is described. The procedure is based on a flow-injection system exploiting the on-line formation of the ...
Síntese e caracterização estrutural de novos compostos organocalcogenoxanos contendo ítrio(III)
(Universidade Federal de Santa MariaBrasilQuímicaUFSMPrograma de Pós-Graduação em QuímicaCentro de Ciências Naturais e Exatas, 2017-07-26)
This work describes the synthesis and structural characterization of new organochalcogenoxanes polymer and clusters compounds containing yttrium(III) ion. The synthetized compounds have structure of unidimensional coordination ...
Dye-sensitized Solar Cells Employing Polymers
(Pergamon-Elsevier Science LTDOxford, 2016)