Gene/Protein Disease Symptom Drug Enzyme Compound
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Query: KEGG:D04166 (FeCl3)
 1,389 document(s) hit in 31,850,051 MEDLINE articles (0.00 seconds)

The aim of the present work was to experimentally evaluate the total antioxidant capacity of different commercially available pharmaceutical integrators based on vitamin E, astaxanthin, resveratrol and blueberry using the traditional DMPD-FeCl3 spectrophotometric method and the ORAC spectrofluorimetric method, largely discussed and described in literature and considered as reference methods. The results were compared with those ones obtained with a biosensor based on superoxide dismutase (SOD) enzyme. Precision of antioxidant capacity measures for all integrators was good, generally with a R.S.D.% <10% for all methods employed. An evaluation was also performed of the possible influence on the total integrator antioxidant capacity from other compounds and/or excipients present in the formulations which can interfere with the main antioxidant component of the commercial integrator.
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PMID:A comparison among three different analytical methods to test the scavenging properties of different integrators against radicalic stress. 2437 51

A novel and low-cost colorimetric sensor for the determination of hydrogen sulphide in environmental samples has been developed. This sensor is based on the immobilization of the reagent N,N-Dimethyl-p-phenylenediamine and FeCl3 in paper support, in which the H2S is adsorbed in order to give rise to the formation of methylene blue as reaction product. The sensor has been applied to determine H2S in water and air samples. Two different sampling systems for H2S caption from the air have been assayed: active and passive sampling. The analytical properties of the different systems have been obtained and compared. The analytical signals, corresponding to the methylene blue, have been obtained measuring the absorbance by conventional reflectance diffuse or using different algorithms for quantifying color intensity. The results obtained with both measurement procedures were comparable, with a detection limit of 1.11 and 1.12mLm(-3) for air samples (active and passive), and 0.5mgL(-1) for water samples. The developed sensor provides good accuracy and precision (RSD<12%) and simplifies significantly the analytical measurements because it avoids the need of preparing derivatization reagents, sample handling and allows in situ measurements. The reaction product obtained is highly stable in this support and no provide any blank signal. Under the optimal conditions, the proposed method exhibit excellent visual sensitivity for the naked eye procedure, making the detection of H2S possible.
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PMID:New optical paper sensor for in situ measurement of hydrogen sulphide in waters and atmospheres. 2726 Apr 38