A lanthanide-based ratiometric fluorescent biosensor for the enzyme-free detection of organophosphorus pesticides

2021 ◽  
Author(s):  
Tianlin Wang ◽  
Yaqing Liu
Keyword(s):  
Organophosphorus Pesticides ◽  
Simple Operation ◽  
Fluorescent Sensing ◽  
Fluorescent Biosensor ◽  
Sensing System ◽  
Short Time

A terbium-based ratiometric fluorescent sensing system was developed for OPs detection with the merits of enzyme-free, simple operation, short-time and sensitive.

Fluorescent biosensor based on magnetic cross-linking enzyme aggregates/CdTe quantum dots for the detection of H2O2-bioprecursors

2020 ◽  
Vol 44 (41) ◽  
pp. 17984-17992
Author(s):  
Guoning Chen ◽  
Qianqian Hu ◽  
Hua Shu ◽  
Lu Wang ◽  
Xia Cui ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Cdte Quantum Dots ◽  
Cross Linking ◽  
Fluorescent Sensing ◽  
Fluorescent Biosensor ◽  
Sensing System

A fluorescent sensing system for H2O2-bioprecursors based on CdTe quantum dots and magnetic cross-linking enzyme aggregates was designed.

scholarly journals A Portable Smartphone-Based Sensing System Using a 3D-Printed Chip for On-Site Biochemical Assays

Sensors ◽  
2018 ◽  
Vol 18 (11) ◽  
pp. 4002 ◽  
Author(s):  
Feiyi Wu ◽  
Min Wang
Keyword(s):  
Organophosphorus Pesticides ◽  
Smartphone Apps ◽  
Color Channel ◽  
Calibration Equation ◽  
Sensing System ◽  
Biochemical Sensing ◽  
Biochemical Assays ◽  
Target Analytes ◽  
New Strategy ◽  
3D Printed

Recently, smartphone-based chromogenic sensing with paper-based microfluidic technology has played an increasingly important role in biochemical assays. However, generally there were three defects: (i) the paper-based chips still required complicated fabrication, and the hydrophobic boundaries on the chips were not clear enough; (ii) the chromogenic signals could not be steadily captured; (iii) the smartphone apps were restricted to the detection of specific target analytes and could not be extended for different assays unless reprogrammed. To solve these problems, in this study, a portable smartphone-based sensing system with a 3D-printed chip was developed. A 3D-printed imaging platform was designed to significantly reduce sensing errors generated during signal capture, and a brand-new strategy for signal processing in downloadable apps was established. As a proof-of-concept, the system was applied for detection of organophosphorus pesticides and multi-assay of fruit juice, showing excellent sensing performance. For different target analytes, the most efficient color channel could be selected for signal analysis, and the calibration equation could be directly set in user interface rather than programming environment, thus the developed system could be flexibly extended for other biochemical assays. Consequently, this study provides a novel methodology for smartphone-based biochemical sensing.

Matter, energy and information network of a graphene-peptide-based fluorescent sensing system for molecular logic computing, detection and imaging of cancer stem cell marker CD133 in cells and tumor tissues

The Analyst ◽  
2019 ◽  
Vol 144 (6) ◽  
pp. 1881-1891 ◽  
Author(s):  
Fu Rui Zhang ◽  
Jiao Yang Lu ◽  
Qing Feng Yao ◽  
Qiu Yan Zhu ◽  
Xin Xing Zhang ◽  
...  
Keyword(s):  
Stem Cell Marker ◽  
Information Network ◽  
Cancer Stem Cell Marker ◽  
Cell Marker ◽  
Fluorescent Sensing ◽  
Sensing System ◽  
Molecular Logic ◽  
Tumor Tissues ◽  
Logic Operations ◽  
Matter Energy

A graphene-peptide-based fluorescent sensing system for molecular logic operations, sensing and imaging of CD133.

scholarly journals Green Synthesis of Fluorescent Ag Nanoclusters for Detecting Cu2+ Ions and Its “Switch-On” Sensing Application for GSH

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Yunpeng Shang ◽  
Hui Gao ◽  
Lei Li ◽  
Chaoqun Ma ◽  
Jiao Gu ◽  
...  
Keyword(s):  
Limit Of Detection ◽  
Synthesis Method ◽  
Fluorescence Emission ◽  
Emission Peak ◽  
Silver Nanoclusters ◽  
Synthesis Process ◽  
Blue Fluorescence ◽  
Fluorescent Sensing ◽  
Sensing System ◽  
Ag Ncs

Herein, we prepared the L-histidine- (His-) protected silver nanoclusters (Ag NCs) by the microwave synthesis method. The synthesis process was rapid, facile, and environmentally friendly. Under 356 nm excitation, the as-prepared Ag NCs exhibited the blue fluorescence, and the fluorescence emission peak was located at 440 nm. The Ag NCs could successfully detect trace copper (Cu2+) ions in the aqueous solution and the limit of detection (LOD) was as low as 0.6 pM. Interestingly, the Ag NCs showed a different pH-dependent selectivity for both Cu2+ and iron (Fe3+) ions with no responses to other heavy metal ions. Furthermore, the as-fabricated fluorescent sensing system was utilized to detect glutathione (GSH, the LOD was 0.8 nM) by using the “switch-on” fluorescence recovery of Ag NCs through adding glutathione (GSH) to the Cu2+-Ag NCs solution.

A portable fluorescent sensing system using multiple LEDs

2017 ◽  
Author(s):  
Young-Ho Shin ◽  
Jonathan Z. Barnett ◽  
M. Teresa Gutierrez-Wing ◽  
Kelly A. Rusch ◽  
Jin-Woo Choi
Keyword(s):  
Fluorescent Sensing ◽  
Sensing System

scholarly journals Illumination of cell cycle progression by multi-fluorescent sensing system

Cell Cycle ◽  
2019 ◽  
Vol 18 (12) ◽  
pp. 1364-1378
Author(s):  
Shuo Liu ◽  
Jun Li ◽  
Teng Wang ◽  
Jiawen Xu ◽  
Zhipei Liu ◽  
...  
Keyword(s):  
Cell Cycle ◽  
Cell Cycle Progression ◽  
Cycle Progression ◽  
Fluorescent Sensing ◽  
Sensing System

A fluorescent biosensor for highly specific and ultrasensitive detection of adenosine triphosphate based on ligation-triggered branched rolling circle amplification

2019 ◽  
Vol 11 (36) ◽  
pp. 4629-4636
Author(s):  
Hongxin Jiang ◽  
Guimei Han ◽  
Yaping Xu ◽  
Junxing Li ◽  
Xiaowei Liu ◽  
...  
Keyword(s):  
Adenosine Triphosphate ◽  
Rolling Circle Amplification ◽  
Dna Ligase ◽  
Ultrasensitive Detection ◽  
Selective Detection ◽  
Rolling Circle ◽  
T4 Dna Ligase ◽  
Fluorescent Sensing ◽  
Fluorescent Biosensor

A fluorescent sensing strategy for ultrasensitive and highly selective detection of ATP was presented by taking advantage of the exponential amplification capability of BRCA and the extreme specificity of T4 DNA ligase toward ATP.

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