lead detection
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2022 ◽  
Author(s):  
Jullian Williams ◽  
Stephen Ackley ◽  
Alberto Mestas-Nunez

Author(s):  
Annatoma Arif ◽  
Angela Mendez Contreras ◽  
Sheikh Dobir Hossain ◽  
Robert C. Roberts

Author(s):  
Jing-Yi Ong ◽  
Zi-Jian Law ◽  
Chang-Hong Pua ◽  
Sook-Wai Phang

Biosensors ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 274
Author(s):  
Yumei Liu ◽  
Hao Yang ◽  
Rui Wan ◽  
Mohammad Rizwan Khan ◽  
Nan Wang ◽  
...  

Lead (Pb2+) pollution is a serious food safety issue, rapid detection of Pb2+ residual in food is vital to guarantee food quality and safety. Here we proposed ratiometric aptamer probes, allowing robust Pb2+ supervision in food samples. Pb2+ specific aptamer can bolster a transition of G-quadruplex structural response to Pb2+; this process can be monitored by N-methyl mesoporphyrin IX (NMM), which is highly specific to G-quadruplex. Particularly, the utilization of G-quadruplex specific dye and terminal-labeled fluorophore allowed to endue ratiometric signal outputs towards Pb2+, dramatically increase the robustness for lead detection. The ratiometric G-quadruplex assay allowed a facile and one-pot Pb2+ detection at room temperature using a single-stranded DNA aptamer. We demonstrated its feasibility for detecting lead pollution in fresh eggs and tap water samples. The ratiometric G-quadruplex design is expected to be used for on-site Pb2+ testing associated with food safety.


2021 ◽  
pp. 130263
Author(s):  
Pawan Pathak ◽  
Jae-Hoon Hwang ◽  
Rachel H.T. Li ◽  
Kelsey L. Rodriguez ◽  
Matthew M. Rex ◽  
...  

2021 ◽  
Author(s):  
Yu Xiong ◽  
Jianyuan Dai ◽  
Yujiao Zhang ◽  
Cuisong Zhou ◽  
Dan Xiao ◽  
...  

Herein, a label-free fluorescent signal amplified system based on catalyzed hairpin assembly (CHA) was reported. In this system, two hairpin probes, H1 and H2, were well-designed in which G-quadruplex sequences...


2020 ◽  
Vol 168 ◽  
pp. 112571
Author(s):  
De-Ming Yang ◽  
Tsai-Feng Fu ◽  
Choun-Sea Lin ◽  
Tai-Yu Chiu ◽  
Chien-Chang Huang ◽  
...  

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