Results 31 to 40 of about 1,703,225 (294)
Molecular characterization of covRS mutations in M1UK Streptococcus pyogenes
FEBS Open Bio, EarlyView.Group A Streptococcus (GAS) acquires covRS mutations driving a hypervirulent bacterial state, frequently associated with invasive disease‐like necrotizing fasciitis. We demonstrate that the newly emerged M1UK GAS lineage can also acquire these mutations.
Jarrad Pritchard +12 more
wiley +1 more source
Spectrophotometric Determination of Ezetimibe
E-Journal of Chemistry, 2010 Two simple, sensitive, selective and accurate spectro-photometric methods (Method A and Method B) for the determination of eztimibe in bulk drug and pharmaceutical formulations (tablets) have been described.
P. Baby Sudha Lakshmi +2 more
doaj +1 more source
Zinc complex based determination of rutin in dietary supplements
Macedonian Journal of Chemistry and Chemical Engineering, 2016 The aim of this study was to develop and validate a simple, rapid and sensitive and low-cost method for determination of rutin in tablets. The proposed spectrophotometric method is based on the formation of the Zn2+-rutin complex in 70 v/v% methanol at ...
Leposava Pavun +4 more
doaj +1 more source
Spectrophotometric determination of antioxidant activity
Redox Report, 1996 The spectrophotometric technique for total antioxidant activity (TAA)(1,2) measures the relative abilities of antioxidants to scavenge the 2,2'-azino-bis(3-ethylbenz-thiazoline-6-sulfonic acid) (ABTS) radical cation (ABTS(•+)) in comparison with the antioxidant potency of standard amounts of Trolox, the water-soluble vitamin E analogue.
N J, Miller, C A, Rice-Evans
openaire +2 more sources
FEBS Open Bio, EarlyView.We report the first β‐glucosidase with demonstrated hydrolytic activity on an N‐linked glycopyranoside. The enzyme, native to maize, was biochemically characterised for this novel reaction, and structural modelling of the enzyme–substrate complex revealed several clues to the underlying reduced catalytic rate relative to its native O‐glycopyranoside ...
Hani Gharabli +3 more
wiley +1 more source
مجلة بغداد للعلوم, 2017 A simple, accurate and sensitive spectrophotometric way is used to determine Bisacodyl in pure and pharmaceutical preparations. The proposed method depends on using 2,4-Dinitrophenylhydrazine as chromogenic reagent . The method was based on the oxidative
Baghdad Science Journal
doaj +1 more source
In silico and in vitro exploration of a tyrosinase for biocatalytic production of catechols
FEBS Open Bio, EarlyView.Tyrosinase from Ralstonia pseudosolanacearum is a promising biocatalyst for producing valuable catechols from monophenol substrates. This tyrosinase is uniquely suited to this due to its high monophenolase : diphenolase ratio. We combined in silico docking and in vivo kinetic characterisation of this tyrosinase with 11 industrially relevant monophenols,
James Britton +6 more
wiley +1 more source
A Sensitive Validated Spectrophotometric Method for the Determination of Flucloxacillin Sodium
E-Journal of Chemistry, 2009 A simple and sensitive spectrophotometric method has been proposed for the determination of flucloxacillin sodium. The determination method is based on charge transfer complexation reaction of the drug with iodine in methanol-dichloromethane medium.
R. Singh Gujral +2 more
doaj +1 more source
FEBS Open Bio, EarlyView.In this study, a novel esterase from the thermoacidophilic archaeon Thermoplasma acidophilum was biochemically and structurally characterized. Our results demonstrate that Ta0887 is a highly thermostable esterase that preferentially hydrolyzes p‐nitrophenyl hexanoate and possesses an α‐helical cap domain that likely contributes to its substrate ...
Alejandro Delgado‐Rey +4 more
wiley +1 more source
Indonesian Journal of Chemistry, 2010 A study of extraction-spectrophotometric method for the determination of trace nitrite as 4-(4-nitrobenzenazo)-1-aminonaphthalene complex using n-amylalcohol and chloroform as organic solvents has been done.
Choirul Amri +2 more
doaj +1 more source