tellurium and fluorexon

Urolithiasis is a common disease with wide ranging effects, with oxalate stones being the most prevalent type. Existing clinical diagnostic methods rely on complex instruments and professionals, are difficult to distinguish between stone types, and have insufficient sensitivity. Moreover, high-sensitivity point-of-care testing (POCT) methods remain scarce. We constructed a rapid homogeneous dual fluorescence and binary visualization analysis system to diagnose oxalate urolithiasis because oxalate can efficiently reduce Cu

Topics: Cadmium Compounds; Calcium Oxalate; Humans; Oxalates; Quantum Dots; Tellurium; Urolithiasis

A cross-reactive sensor array using mercaptopropionic acid modified cadmium telluride (CdTe), glutathione modified CdTe, poly(methacrylic acid) modified silver nanoclusters, bovine serum albumin modified gold nanoclusters, rhodamine derivative and calcein blue as fluorescent indicators has been designed for the detection of seven heavy metal ions (Ag(+), Hg(2+), Pb(2+), Cu(2+), Cr(3+), Mn(2+) and Cd(2+)). The discriminatory capacity of the sensor array to different heavy metal ions in different pH solutions has been tested and the results have been analyzed with linear discriminant analysis. Results showed that the sensor array could be used to qualitatively analyze the selected heavy metal ions. The array performance was also evaluated in the identification of known and unknown samples and the preliminary results suggested the promising practicability of the designed sensor assay.

Topics: Animals; Biosensing Techniques; Cadmium Compounds; Cattle; Fluoresceins; Fluorescent Dyes; Glutathione; Gold; Hydrogen-Ion Concentration; Ions; Metals, Heavy; Nanoparticles; Nanotechnology; Rhodamines; Serum Albumin, Bovine; Silver; Spectrometry, Fluorescence; Tellurium

In this paper, 3-mercaptocarboxylic acid (MPA) modified CdTe quantum dots (QDs) were used as sensitizers, to enhance the chemiluminescence (CL) of the calcein/K(3)Fe(CN)(6) system. A new CL system of CdTe/calcein/K(3)Fe(CN)(6) was developed. The effects of reactant concentrations and the particle sizes of CdTe QDs on the CL emission were investigated in detail. The possible enhancement mechanism of the CL was also further investigated based on the photoluminescence (PL) and CL spectra. Polyphenols such as chlorogenic acid, quercetin, hyperin, catechin and kaempferol, were observed to inhibit the CL signal of the CdTe/calcein/K(3)Fe(CN)(6) system and determined by the proposed method. The proposed method was applied to the determination of hyperin in seed of Cuscuta chinensis Lam. and the results obtained were satisfactory.

Topics: Cadmium; Cuscuta; Ferricyanides; Fluoresceins; Luminescent Measurements; Plant Extracts; Quantum Dots; Quercetin; Seeds; Tellurium

Cation-exchange reaction was applied to transform internal chemical input between luminescent CdTe nanorods and metal-bound organic dyes Calcein Blue into fluorescence signal output with amplified response, which provided ultrasensitive and highly selective detection of Cu(II) ions.

Topics: Biosensing Techniques; Cadmium Compounds; Cations; Copper; Fluoresceins; Fluorescent Dyes; Nanotubes; Polyethyleneimine; Spectrometry, Fluorescence; Tellurium; Thioglycolates