Colorimetric sensing of calcium carbide over banana peel using 5,5′-dithiobis-(2-nitrobenzoic acid) (DTNB) as rapid chemoreceptor: A point of care tool for food fraud analysis
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چکیده
Point-of-care sensing systems have led to the rapid development of smart and portable devices in field analyte detection technology. The high flow artificially ripened fruits (ARFs) in...
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15 صفحه اولColorimetric determination of serum cholinesterase and its genetic variants by the propionylthiocholine-dithiobis(nitrobenzoic acid)procedure.
Submitters: Albert A. Dietz, Herbert M. Rubinstein, and Tina Lubrano, Research and Medical Services, VA Hospital, Hines, III. 60141; and Departments of Biochemistry and Medicine, Loyola University Stritch School of Medicine, Maywood, III. 60153 Evaluators: Philip J. Garry, Department of Pediatrics, Children’s Hospital, Ohio State University, Columbus, Ohio 43205 Frank Madera-Orsini, Biochemistr...
متن کاملOn the reactivity of metallothioneins with 5,5'-dithiobis-(2-nitrobenzoic acid).
Rat liver and horse kidney metallothioneins react with 5,5'-dithiobis-(2-nitrobenzoic acid) (Nbs2) to release 5-thio-2-nitrobenzoate and metal ions. The reactions are slow and exhibit biphasic kinetics with each process having an empirical rate law of the form: rate - k[RSM] X [Nbs2] + k'[RSM], where RSM represents mental-bound thiolate groups. The pseudo-first-order rates are insensitive to pH...
متن کاملMechanism of the inactivation of guinea pig liver transglutaminase by 5,5'-dithiobis-(2-nitrobenzoic acid).
Reaction of 5,5’-dithiobis(24trobenzoic acid) (DTNB) with transglutaminase in the absence of calcium ion results in losses in the transferase and hydrolysis activities of the enzyme toward the substrate, benzyloxycarbonyl-L-glutaminylglycine (Z-L-glutaminylglycine). These activities are reduced 70 to 100% by reaction with 1 to 1.5 eq of DTNB. The calcium-dependent esterase activity of transglut...
متن کاملEffect of daylight on the reaction of thiols with Ellman's reagent, 5,5'-dithiobis(2-nitrobenzoic acid).
The reaction of 5,5'-dithiobis(2-nitrobenzoic acid) (DTNB, Ellman's reagent) with thiols is sensitive to daylight, in particular to ultraviolet radiation at wavelengths around 325 nm. Exposure to light at the absorbance maximum of the yellow product (the thionitrobenzoate ion) at 410 nm had no effect on the reaction. The light-sensitive species is apparently the DTNB, because a spectral-irradia...
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ژورنال
عنوان ژورنال: Materials advances
سال: 2023
ISSN: ['2633-5409']
DOI: https://doi.org/10.1039/d3ma00212h