Visual determination of azodicarbonamide in flour by label-free silver nanoparticle colorimetry

2021 ◽  
Vol 337 ◽  
pp. 127990
Author(s):  
Fei Chen ◽  
Lulu Liu ◽  
Wenrui Zhang ◽  
Wanfeng Wu ◽  
Xuejing Zhao ◽  
...  
Keyword(s):  
Silver Nanoparticle ◽  
Label Free

Label-Free Determination of the Cell Cycle Phase in Human Embryonic Stem Cells by Raman Microspectroscopy

2013 ◽  
Vol 85 (19) ◽  
pp. 8996-9002 ◽  
Author(s):  
Stanislav O. Konorov ◽  
H. Georg Schulze ◽  
James M. Piret ◽  
Michael W. Blades ◽  
Robin F. B. Turner
Keyword(s):  
Cell Cycle ◽  
Stem Cells ◽  
Embryonic Stem Cells ◽  
Human Embryonic Stem Cells ◽  
Embryonic Stem ◽  
Raman Microspectroscopy ◽  
Cell Cycle Phase ◽  
Cycle Phase ◽  
Label Free

Label-free RF biosensors for human cell dielectric spectroscopy

2009 ◽  
Vol 1 (6) ◽  
pp. 497-504 ◽  
Author(s):  
Claire Dalmay ◽  
Arnaud Pothier ◽  
Mathilde Cheray ◽  
Fabrice Lalloue ◽  
Marie-Odile Jauberteau ◽  
...  
Keyword(s):  
Human Cell ◽  
Cell Types ◽  
Label Free ◽  
Microwave Frequencies ◽  
Non Invasive ◽  
System Cell ◽  
Electromagnetic Characteristics ◽  
Biosensor Chip ◽  
Rf Signal

This paper presents an original biosensor chip allowing determination of intrinsic relative permittivity of biological cells at microwave frequencies. This sensor permits non-invasive cell identification and discrimination using an RF signal to probe intracellular medium of biological samples. Indeed, these sensors use an RF planar resonator that allows detection capabilities on less than 10 cells, thanks to the microscopic size of its sensitive area. Especially, measurements between 15 and 35 GHz show the ability label-free biosensors to differentiate two human cell types using their own electromagnetic characteristics. The real part of permittivity of cells changes from 20 to 48 for the nervous system cell types studied. The proposed biodetection method is detailed and we show how the accuracy and the repeatability of measurements have been improved to reach reproducible measurements.

Label Free Determination of Potassium Ions Using Crystal Violet and Thrombin-Binding Aptamer

2014 ◽  
Vol 47 (10) ◽  
pp. 1726-1736 ◽  
Author(s):  
Bin Zheng ◽  
Sheng Cheng ◽  
Huaze Dong ◽  
Haojun Liang ◽  
Jian Liu ◽  
...  
Keyword(s):  
Crystal Violet ◽  
Potassium Ions ◽  
Label Free

Label-free and sensitive electrochemiluminescence aptasensor for the determination of 17β-estradiol based on a competitive assay with cDNA amplification

2014 ◽  
Vol 6 (17) ◽  
pp. 6796 ◽  
Author(s):  
Jing-Jing Zhang ◽  
Jun-Tao Cao ◽  
Gui-Fang Shi ◽  
Ke-Jing Huang ◽  
Yan-Ming Liu ◽  
...  
Keyword(s):  
Label Free ◽  
Competitive Assay ◽  
17Β Estradiol
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