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Selective binding and fluorescence sensing of Zn(II)/Cd(II) using macrocyclic tetra-amines with different fluorophores: insights into the design of selective chemosensors for transition metals.
Dalton Trans
January 2025
Department of Human Sciences for the Promotion of Quality of Life, Università San Raffaele Roma, via di Val Cannuta 247, 00166 Roma, Italy.
Article Synopsis
- Selective binding and optical sensing of Zn(II) and Cd(II) in water were studied using different receptors (L1, HL2, L3, HL4, HL5) to see how complex stability affects metal signaling.
- The receptors all have a cyclic tetra-amine structure combined with either one or two quinoline or 8-hydroxyquinoline units, influencing their properties and interactions.
- The study showed that Zn(II) forms more stable complexes with some receptors, while Cd(II) complexes benefit from better fitting in specific cavities, leading to unique optical behaviors for each metal in their respective complexes.
Zinc Sensing with Pyridine-Based Lanthanide Contrast Agent: Structural Analysis in Aqueous Solution.
Chemistry
December 2024
CNRS, Centre de Biophysique Moléculaire, Rue Charles Sadron, 45071, Orléans, FRANCE.
Zinc is an important physiological cation, and its misregulation is implicated in various diseases. It is therefore important to be able to image zinc by non-invasive methods such as Magnetic Resonance Imaging (MRI). In this work, we have successfully synthesized a novel Gd3+-based complex specifically for Zn2+ sensing by MRI.
View Article and Find Full Text PDFPilot study evaluation of the eQUANT™ system for accelerated antimicrobial susceptibility testing of gram-negative organisms directly from positive blood cultures.
Diagn Microbiol Infect Dis
December 2024
University Hospitals Cleveland Medical Center, Cleveland, OH, USA; Case Western Reserve University, Cleveland, OH, USA. Electronic address:
We describe results from a multicenter pilot study evaluating the eQUANT system for rapid generation of a standardized inoculum (0.5 McFarland equivalent) directly from blood cultures positive for target gram-negative bloodstream pathogens for same-day antimicrobial susceptibility testing (AST) by disk diffusion, MicroScan and Vitek2 methods. Out of 167 blood cultures that met study criteria (monomicrobial with one of 9 target gram-negative species), colony counts from eQUANT suspensions of 164 (98.
View Article and Find Full Text PDFImproved Sensitivity of a Taste Sensor Composed of Trimellitic Acids for Sweetness.
Molecules
November 2024
Research and Development Center for Five-Sense Devices, Kyushu University, 744 Motooka, Nishi-ku, Fukuoka 819-0395, Japan.
Currently, lipid/polymer membranes are used in taste sensors to quantify food taste. This research aims to improve sweetness sensors by more selectively detecting uncharged sweetening substances, which have difficulty obtaining a potentiometric response. Lipid/polymer membranes with varying amounts of tetradodecylammonium bromide (TDAB) and 1,2,4-benzene tricarboxylic acid (trimellitic acid) were prepared.
View Article and Find Full Text PDFLabel-free determination of glypican-3 using PtPd@H-rGO nanocomposites decorated light-addressable potentiometric sensor.
Bioelectrochemistry
April 2025
School of Life and Environmental Sciences, Guilin University of Electronic Technology, Guilin, Guangxi 541004, PR China. Electronic address:
Glypican-3 (GPC3) is exclusively overexpressed in most Hepatocellular carcinoma (HCC) tissue but not in normal liver tissue, making it a promising biomarker for the precise detection of HCC. In this paper, a label-free light-addressable potentiometric sensor (LAPS) decorated by platinumpalladium-hemin-reduced graphene oxide nanocomposites (PtPd@H-rGO NCs) was constructed for determination of GPC3. The GPC3 aptamer (GPC3) and PtPd@H-rGO NCs were modified on the surface of silicon-based LAPS chip to build sensitive unit of LAPS system.
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