Results 21 to 30 of about 133,341 (312)

High-Performance Colorimetric Detection of Thiosulfate by Using Silver Nanoparticles for Smartphone-Based Analysis [PDF]

, 2017
Developing thiosulfate (S2O32-) sensors with silver nanoparticles (AgNPs) for analysis of aqueous solutions with the interference of other anions remains challenging. In this study, we propose a new strategy for excellent selective colorimetric detection
Zhou, Zhuangwei, Aiguo Wu, Chen Dong, Shen, Zheyu, Dong, Chen, Yujie Zhang, Zhang, Yujie, Zhuqing Wang, Xuehua Ma, M. Zubair Iqbal, Zhuangwei Zhou, Miao, Lijing, Zheyu Shen, Lijing Miao, Iqbal, M. Zubair, Wu, Aiguo, Wang, Zhuqing, Ma, Xuehua   +17 more
core   +1 more source

Gold Nanoparticle-based Colorimetric Aptasensor for Detection of Malathion [PDF]

Shipin Kexue, 2023
In this study, a novel colorimetric sensing method for the detection of malathion was established based on the principle that gold nanoparticles (AuNPs) can aggregate in high-salt solutions, leading to color changes in the solutions.
TIAN Hengqi, WANG Yao, YANG Haitao, LI Zhaozhou, WU Jiabei, WANG Lin, LIU Haoyu, CHANG Yunhe, CHEN Xiujin
doaj   +1 more source

WarmStart colorimetric loop-mediated isothermal amplification for the one-tube, contamination-free and visualization detection of Shigella flexneri

International Journal of Infectious Diseases, 2021
Objectives: Shigella flexneri (S. flexneri) is prevalent worldwide and the most common Shigella in many countries, causing highly contagious diarrhea, which seriously threatens public health.
Yaoqiang Shi, Min Xu, Xiaoqiong Duan, Shilin Li, Jia-wei Ding, Limin Chen   +5 more
doaj   +1 more source

Silver nanoparticles as a bifunctional probe for label-free and reagentless colorimetric hydrogen peroxide chemosensor and cholesterol biosensor

Journal of Science: Advanced Materials and Devices, 2020
A colorimetric chemosensor for hydrogen peroxide (H2O2) and biosensor for cholesterol is developed in this work following a ‘label-free and reagentless’ concept.
Hoang V. Tran, Tuan V. Nguyen, Lan T.N. Nguyen, Hong S. Hoang, Chinh D. Huynh   +4 more
doaj   +1 more source

Inkjet printed LED based pH chemical sensor for gas sensing [PDF]

, 2009
Predictable behaviour is a critical factor when developing a sensor for potential deployment within a wireless sensor network (WSN). The work presented here details the fabrication and performance of an optical chemical sensor for gaseous acetic acid ...
O'Toole, Martina, Wallace, Gordon, O\u27Toole, Martina, Gordon G. Wallace, Dermot Diamond, Shepherd, Roderick, Roderick Shepherd, Martina O’Toole, Diamond, Dermot   +8 more
core   +1 more source

Bacteria detection based on the evolution of enzyme-generated volatile organic compounds: Determination of Listeria monocytogenes in milk samples [PDF]

, 2014
The rapid detection of Listeria monocytogenes contamination in food is essential to prevent food-borne illness in humans. The aim of this study was to differentiate non-contaminated milk from milk contaminated with L.
Dean, John, Stanforth, Stephen, Tait, Emma, Perry, John   +3 more
core   +1 more source

Paper-Based Analytical Device for Zinc Ion Quantification in Water Samples with Power-Free Analyte Concentration

Micromachines, 2017
Insufficient sensitivity is a general issue of colorimetric paper-based analytical devices (PADs) for trace analyte detection, such as metal ions, in environmental water.
Hiroko Kudo, Kentaro Yamada, Daiki Watanabe, Koji Suzuki, Daniel Citterio   +4 more
doaj   +1 more source

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

Foods, 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, Mengni Sun, Hanxing Shi, Liangliang Xue, Min Zhang, Wenge Yang, Yali Dang, Zhaohui Qiao   +7 more
doaj   +1 more source

Mobile Phone-based Colorimetric Detection of Perfluorocarboxylic Acids using Porphyrin Hosts [PDF]

, 2022
Perfluorinated carboxylic acids (PFCAs) are widespread, potentially harmful, and difficult to detect pollutants. Here we investigate the use of three colorimetric porphyrin host molecules with chain lengths derived from different PFCA precursors as ...
Nathan L., Kilah, Chloe M., Taylor, Michael C., Breadmore   +2 more
core   +1 more source

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

Foods, 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, Long Fu, Chaoyun Wu, Sheng Xu, Yanhong Bai   +4 more
doaj   +1 more source