Results 21 to 30 of about 24,311 (260)

Colorimetric Sensing of Lactate in Human Sweat Using Polyaniline Nanoparticles-Based Sensor Platform and Colorimeter

Biosensors, 2022
In emergency medicine, the lactate level is commonly used as an indicator of the severity and response to the treatment of hypoperfusion-related diseases. Clinical lactate measurements generally require 3 h for clinical determination.
Hyun Jung Kim, Insu Park, Seung Pil Pack, Gyudo Lee, Yoochan Hong   +4 more
doaj   +1 more source

A Colorimetric pH Sensor Based on Clitoria sp and Brassica sp for Monitoring of Food Spoilage Using Chromametry

Sensors, 2019
A developed colorimetric pH sensor film based on edible materials for real-time monitoring of food freshness is described. The mixed natural dyes from edible plants Clitoria sp and Brassica sp were extracted and incorporated into ι-carrageenan film ...
Noor Azizah Ahmad, Lee Yook Heng, Faridah Salam, Mohd Hazani Mat Zaid, Sharina Abu Hanifah   +4 more
doaj   +1 more source

Colorimetric plasmon resonance microfluidics on nanohole array sensors

Sensing and Bio-Sensing Research, 2015
We present the label-free colorimetric visualization in microfluidics using plasmon resonance on a large-area and over a wide field-of-view (>100 mm2) nanohole array device called nanoLycurgus Cup Array (nanoLCA).
Austin Hsiao, Manas Ranjan Gartia, Te-Wei Chang, Xinhao Wang, Pakapreud Khumwan, Gang Logan Liu   +5 more
doaj   +1 more source

Investigation into the predictive performance of colorimetric sensor strips using RGB, CMYK, HSV, and CIELAB coupled with various data preprocessing methods: a case study on an analysis of water quality parameters

Journal of Analytical Science and Technology, 2021
The potential use of colorimetric sensors has received significant attention due to its feasibility for use in various applications. After reacting with a sample, the image of the colorimetric sensor can be captured and converted into digital data using ...
Nutthatida Phuangsaijai, Jaroon Jakmunee, Sila Kittiwachana   +2 more
doaj   +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

Methyl-3-(2-hidroxy-5-nitrophenyl amino)-3-phenylpropanoate Based Colorimetric Sensor for Oxyanions

Indonesian Journal of Chemistry, 2020
A colorimetric anion sensor of methyl-3-(2-hydroxy-5-nitrophenyl amino)-3-phenylpropanoate bearing –OH and –NH groups as binding sites and nitrophenyl as a signaling unit, has been successfully accomplished.
Venty Suryanti, Fajar Rakhman Wibowo, Sekar Handayani   +2 more
doaj   +1 more source

Colorimetric Detection of the SARS-CoV-2 Virus (COVID-19) in Artificial Saliva Using Polydiacetylene Paper Strips

Biosensors, 2022
The spread and resurgence of the SARS-CoV-2 virus (COVID-19 disease) threatens human health and social relations. Prevention of COVID-19 disease partly relies on fabricating low-cost, point-of-care (POC) sensing technology that can rapidly and ...
Christopher D. Prainito, Gaddi Eshun, Francis J. Osonga, Daniel Isika, Cynthia Centeno, Omowunmi A. Sadik   +5 more
doaj   +1 more source

Dual Colorimetric Sensor for Hg2+/Pb2+ and an Efficient Catalyst Based on Silver Nanoparticles Mediating by the Root Extract of Bistorta amplexicaulis

Frontiers in Chemistry, 2020
Environmental pollution derivated from toxic metals and organic toxins is becoming a serious issue worldwide because of their harmful effects on the ecosystem and human health.
Farid Ahmed, Farid Ahmed, Humaira Kabir, Hai Xiong   +3 more
doaj   +1 more source

High-Precision Colorimetric Sensing by Dynamic Tracking of Solvent Diffusion in Hollow-Sphere Photonic Crystals

Research, 2022
Expensive instruments and complicated data processing are often required to discriminate solvents with similar structures and properties. Colorimetric sensors with high selectivity, low cost, and good portability are highly desirable to simplify such ...
Qianqian Fu, Jianping Ge, Chen Chen, Zichen Wang, Fan Yang, Yadong Yin   +5 more
doaj   +1 more source

Deployable Lab-on-a-Chip Sensor for Colorimetric Measurements

Micromachines, 2023
The infield measurement of nutrients, heavy metals, and other contaminants in water is still a needed tool in environmental sciences. The Lab-on-a-chip approach can develop deployable instruments that use the standardized analytical assay in a ...
Stefan Gassmann, Till Schleifer, Helmut Schuette   +2 more
doaj   +1 more source