Results 21 to 30 of about 120,673 (267)

A Colorimetric/Fluorescent Dual-Mode Aptasensor for Salmonella Based on the Magnetic Separation of Aptamers and a DNA-Nanotriangle Programmed Multivalent Aptamer

open access: yesFoods, 2023
Salmonella infection has emerged as a global health threat, causing death, disability, and socioeconomic disruption worldwide. The rapid and sensitive detection of Salmonella is of great significance in guaranteeing food safety.
Na Ma   +7 more
doaj   +1 more source

2-LED-µSpectrophotometer for Rapid On-Site Detection of Pathogens Using Noble-Metal Nanoparticle-Based Colorimetric Assays

open access: yesApplied Sciences, 2020
Novel point-of-care compatible methods such as colorimetric assays have become increasingly important in the field of early pathogen detection.
Cornelia Reuter   +5 more
doaj   +1 more source

Rapid Trace Detection of Sulfite Residue in White Wine Using a Multichannel Colorimetric Nanozyme Sensor

open access: yesFoods, 2023
As a commonly used food additive, sulfite (SO32−) is popular with food manufacturers due to the functions of bleaching, sterilizing, and oxidation resistance. However, excess sulfites can pose a threat to human health.
Xiaoyue Yue   +4 more
doaj   +1 more source

Pyrophosphate-Enhanced Oxidase Activity of Cerium Oxide Nanoparticles for Colorimetric Detection of Nucleic Acids

open access: yesSensors, 2021
In recent years, cerium oxide (CeO2) nanoparticles (NPs) have drawn significant attention owing to their intrinsic enzyme mimetic properties, which make them powerful tools for biomolecular detection.
Seokhwan Kim   +6 more
doaj   +1 more source

Colorimetric Detection of Polynucleotides on Polypropylene Slices

open access: yesAnalytical Sciences, 2004
The gold-label-silver-stain method (GLSS) for DNA hybridization detection has been receiving increased interest as a colorimetric detective method, demonstrating the advantages of non-radioactivity, non-quenching effect of fluorescence and simplicity for analytical equipment.
NIE, Libo   +5 more
openaire   +3 more sources

Photonic Nanosensor for Colorimetric Detection of Metal Ions [PDF]

open access: yesAnalytical Chemistry, 2015
The real-time sensing of metal ions at point of care requires integrated sensors with low energy and sample consumption, reversibility, and rapid recovery. Here, we report a photonic nanosensor that reversibly and quantitatively reports on variation in the concentrations of Pb(2+) and Cu(2+) ions in aqueous solutions (
Yetisen, Ali K.   +6 more
openaire   +5 more sources

Rapid Sensing of Biological and Environmental Analytes Using Microwave-Accelerated Bioassays and a MATLAB Application

open access: yesNano Biomedicine and Engineering, 2019
We report a method for rapid detection and analysis of biological and environmental analytes by microwave-accelerated bioassays (MABs) and a novel MATLAB-based image processing of colorimetric signals. In this regard, colorimetric bioassays for histidine-
Enock Bonyi   +4 more
doaj   +1 more source

Advances in material for colorimetric and fluorescent detection of arsenic

open access: yesBiosensors and Bioelectronics: X, 2023
Arsenic contamination in potable water has become a growing menace globally. The established method including instrumental and laboratory-based techniques can detect arsenic in water with an accuracy of 1 ppb. Nevertheless, these methods required trained
Nishtha Khansili
doaj   +1 more source

Recent Advances in the Colorimetric Detection of Cyanide

open access: yesCHIMIA, 2009
This short-review discusses the recent developments in the colorimetric detection of cyanide with different types of receptors. Significant progress in terms of selectivity, sensitivity and straightforwardness has been observed for either organic-, main group- or transition metal-based sensors.
Zelder, Felix Hubertus   +1 more
openaire   +4 more sources

Multi-Angular Colorimetric Responses of Uni- and Omni-Directional Femtosecond Laser-Induced Periodic Surface Structures on Metals

open access: yesNanomaterials, 2021
We investigated the colorimetric behaviors of metal surfaces with unidirectional low-spatial-frequency laser-induced periodic surface structures (UD-LSFLs) and omnidirectional LSFLs (OD-LSFLs) fabricated using femtosecond laser pulse irradiation.
Taek-Yong Hwang   +5 more
doaj   +1 more source

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