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Considering the ionic strength for proper use of 1 or 2-ligands model for static fluorescence quenching or enhancement.

Published in Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

We formally describe a 1- or 2-ligands fluorescence quenching or exhaustion model that takes ionic strength into account. We give ready-to-use formulas, which are easy to implement on a common spreadsheet, to determine complexing capacities and apparent stability constants of fluorescence ligands by adjusting quenching or enhancing experimental cur...

Magnetic nanoparticles based on cerium MOF supported on the MWCNT as a fluorescence quenching sensor for determination o...

Published in Environmental pollution (Barking, Essex : 1987)

In this study, a new magnetic nanocomposite was developed as an efficient and fast-response fluorescence quenching sensor for determination of anticancer drug 6-mercaptopurine (6-MP). For this purpose, the needle-shape fluorescence metal-organic framework of cerium (Ce-MOF) were successfully synthesized on the surface of multiwalled carbon nanotube...

An investigation on fluorescence quenching of Cu(II) complex and in vitro cytotoxicity assay

ABSTRACT. Fluorescence study of Cu(II) complex of 4-((2-hydroxynaphthalen-1-ylmethylene)amino)-N-(pyridin-2-yl)benzenesulfonamide by alizarin dye has been probed in DMSO. In the fluorescence quenching the electron transfer occurs from Cu(II) complex to alizarin. The structure of the complex was confirmed by EPR and powder XRD techniques. The Cu(II)...

The inhibitory mechanism of chlorogenic acid and its acylated derivatives on α-amylase and α-glucosidase.

Published in Food chemistry

Due to the poor lipophilicity of chlorogenic acid (CA), five CA derivatives (C2-CA, C4-CA, C6-CA, C8-CA, and C12-CA) with different lipophilicities were synthesized using acylation catalyzed by lipase in present study. The inhibitory activities and mechanisms of CA and its derivatives on α-amylase and α-glucosidase were then determined. Results sho...

High-pressure microfluidization of whey proteins: Impact on protein structure and ability to bind and protect lutein.

Published in Food chemistry

Dynamic high-pressure homogenization microfluidization (DHPM) is a versatile emerging technology that may be applied to food processing to achieve several goals. DHPM may, depending on nature of the molecules and the working parameters, induce changes in protein structure, which may improve or impair their techno-functional properties and ability t...

Effect of caffeine on the possible amelioration of diabetic neuropathy: A spectroscopic study.

Published in Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

One of the consequential and alarming complications of diabetes mellitus is diabetic neuropathy (DN). DN is assured to be caused chiefly by excess sorbitol levels in the body. The harmful consequences of DN alike peripheral nerve damage with extremity ulcers may be dodged with timely detection and treatment. The therapeutic methods for DN are scarc...

ZnS quantum dots as fluorescence sensor for quantitative detection of tetracycline

X–ZnS quantum dots (QDs) are synthesized in aqueous solution by a simple aqueous chemical route where X represents 3-mercaptopropionic acid (MPA) or 3-mercapto-1-propanesulfonic acid (MPS) which are two well-known low cost and stable ligands. The synthesized X–ZnS QDs yielded aqueous suspensions of nanoparticles with excellent monodispersity, water...

N-ethyl-2-pyrrolidinone substitution enhances binding affinity between tea flavoalkaloids and human serum albumin: Great...

Published in Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

Formation of catechins-human serum albumin (HSA) complex contributes to stably transporting catechins and regulating their bioavailability. Recently, a new class of catechins namely flavoalkaloids have been reported from tea. The unique structural modification with an N-ethyl-2-pyrrolidinone ring at catechins from these flavoalkaloids has raised ou...

Development of Ag nanoparticle-carbon quantum dot nanocomplex as fluorescence sensor for determination of gemcitabine.

Published in Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy

Gemcitabine hydrochloride is an established chemotherapeutic agent in several solid tumors. In spite of outstanding therapeutic efficacy, there are some serious fetal side effects with gemcitabine in higher concentrations which necessitate developing a sensitive sensor for its quantification. Herein, a fluorescent metal-nanoparticles conjugated car...