The objective of this work was to estimate the antioxidant capacity of some fruits extracts containing anthocyanins (strawberry, raspberry, elderberry, mulberry, blackberry, bilberry, black and red currant) using an electrochemical technique and three classical chemical methods based on reaction between antioxidants and a chromogen compound. evaluation of antioxidant activities of extracts was ...

formula (1, 2) has circumvented this problem to some extent. However, the amount and type of interfering chromogen in urine is not a constant factor, so that the routine use of the correction formula often leads to unreliable results. Recently Sheath (3) reported that the addition of formalin to urine prior to hot-acid hydrolysis greatly reduced the formation of nonsteroidal chromogens. Also, t...

We introduce a one-step histochemical method with cobalt as the precipitating agent for ferrocyanide for the light microscopic demonstration of acetylcholinesterase activity. This method was used to demonstrate acetylcholinesterase in normal cortical fibers and neurons, as well as pathological elements such as plaques and tangles. This procedure can also be easily combined with immunohistochemi...

Two simple, precise and accurate visible spectrophotometric methods were developed for the estimation of Aceclofenac in bulk drug and in pharmaceutical formulations. The proposed methods were indirect and based on determination of aceclofenac after its reaction with either (p-dimethylaminocinnamaldehyde or 3-Methyl-2-benzothiazolinone hydrazine hydrochloride and measuring the chromogen at the λ...

Two novel simple, precise and rapid spectrophotometric methods (Mehod A and Mehod B) are proposed for the determination of sulfamethaxazole (SFZ) using ferric chloride and potassium ferricyaide, sodium nitrite and resorcinol, as reagents. Method A is based reduction of Fe+3 by SFZ and Fe+2 produced forms complex with potassium ferricyanide to form a green colored chromogen having maximum absorp...

Two simple, economic, sensitive and reproducible and rapid spectrophotometric & chromatographic methods have been developed and validated for the determination of Zaleplon (Zpl) in capsules and as bulk drug. The methods are based on the reduction of ferric chloride by Zpl in neutral medium and subsequent chelation of iron (II) with 1, 10phenanthroline (phen) (method A) or 2, 2 ́-bipyridyl (bipy)...

I N the chalcidoid wasp Mormoniella vitripennis (Walker) there has been formed by mutation a series of multiple allelic genes, each differing from wild type in one or more factors. The term “factor” is here used in an inclusive sense to denote anything which has an effect on development or which can in any other way be detected. The genes in this “R’ series are pleiotropic, unifactorial, bifact...

In the course of column partition-chromatographic analysis of ketonic-phenolic fractions obtained from ether extracts of enzymically hydrolysed pregnancy urine, Kober-chromogenic material slightly more 'polar' in its chromatographic behaviour than 16oc-hydroxyoestrone (17-oxooestra-1:3:5-triene-3:16oa-diol) was regularly detected. The two possibilities were at first considered that this materia...

The Svennerholm modification of the Elson-Morgan method for glucosamine analysis was evaluated for its applicability to the rapid determination of chitin in wood decay fungi. The evaluation included extent of chromogen interference, sensitivity, color stability, and hydrolysis conditions for maximum release of glucosamine from fungal cell walls. With our further modification, the Svennerholm me...

Two simple, precise and accurate spectrophotometric methods were developed for the estimation of Gefitinib in bulk drug and in pharmaceutical formulations. Method A and B is based on oxidation of followed by coupling of 3metyl-1,2-benzothiazolinone hydrazone (MBTH) with Gefitinib using Ferric chloride and Cerric ammonium nitrate(CAN) and measuring the chromogen at the λmax of 438 and 675 respec...