The unfolding of G-quadruplexes and its adverse effect on DNA—gold nanoparticles-based sensing system

2014 ◽  
Vol 53 ◽  
pp. 479-485 ◽  
Author(s):  
Sheng Cheng ◽  
Bin Zheng ◽  
Mozhen Wang ◽  
Xuewu Ge ◽  
Qing Zhao ◽  
...  
Keyword(s):  
Adverse Effect ◽  
Gold Nanoparticles ◽  
Sensing System

Gold nanoparticle-based fluorescent “turn-on” sensing system for the selective detection of mercury ions in aqueous solution

RSC Advances ◽  
2015 ◽  
Vol 5 (115) ◽  
pp. 95268-95272 ◽  
Author(s):  
Sohee Choi ◽  
Youngmi Kim
Keyword(s):  
Aqueous Solution ◽  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Sensitive Detection ◽  
Selective Detection ◽  
Mercury Ions ◽  
Buffer Solution ◽  
Aqueous Buffer ◽  
Turn On ◽  
Sensing System

A simple and straightforward fluorometric assay using dye-adsorbed gold nanoparticles (AuNPs) was used in the highly selective and sensitive detection of mercury ions in aqueous buffer solution.

The unexpected effect of PEGylated gold nanoparticles on the primary function of erythrocytes

Nanoscale ◽  
2014 ◽  
Vol 6 (15) ◽  
pp. 9017-9024 ◽  
Author(s):  
Zeng He ◽  
Jiaxin Liu ◽  
Libo Du
Keyword(s):  
Adverse Effect ◽  
Gold Nanoparticles ◽  
Cell Membrane ◽  
Unexpected Effect ◽  
Primary Function

The PEGylated AuNPs have an adverse effect on the deformability and oxygen-delivering ability of erythrocytes through damage to the cell membrane.

Determination of Tigecycline by Quantum Dots/Gold Nanoparticles-based Fluorescent and Colorimetric Sensing System

2015 ◽  
Vol 11 (2) ◽  
pp. 206-213 ◽  
Author(s):  
Baoyu Ge ◽  
Zhigang Li ◽  
Yuanzhe Xie ◽  
Lingling Yang ◽  
Ruiyong Wang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Gold Nanoparticles ◽  
Colorimetric Sensing ◽  
Sensing System

Cocaine detection using aptamer and molybdenum disulfide-gold nanoparticle-based sensors

Nanomedicine ◽  
2020 ◽  
Vol 15 (4) ◽  
pp. 325-335
Author(s):  
Li Gao ◽  
Wenwen Xiang ◽  
Zebin Deng ◽  
Keqing Shi ◽  
Huixing Wang ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Detection Limit ◽  
Molybdenum Disulfide ◽  
Low Cost ◽  
High Sensitivity ◽  
Label Free ◽  
Sensing System ◽  
Plasmon Resonance Band ◽  
Resonance Band ◽  
Cocaine Detection

Aim: The current work highlighted a novel colorimetric sensor based on aptamer and molybdenum disulfide (MoS2)-gold nanoparticles (AuNPs) that was developed for cocaine detection with high sensitivity. Materials & methods: Due to the presence of the plasmon resonance band on the surface of AuNPs, AuNPs aggregated and the color was changed from red to blue after adding a certain concentration of NaCl. We used MoS2 to optimize the sensing system of AuNPs. The folded conformation of the aptamer in combination with cocaine enhanced the salt tolerance of the MoS2-AuNPs, effectively preventing their aggregation. Results & conclusion: The detection limit of cocaine was 7.49 nM with good selectivity. The method based on MoS2-AuNPs colorimetry sensor is simple, quick, label-free and low cost.

Sensitive and selective sensing system of metallothioneins based on carbon quantum dots and gold nanoparticles

2020 ◽  
Vol 1125 ◽  
pp. 177-186 ◽  
Author(s):  
Lian Duan ◽  
Xiaoyu Du ◽  
Huijun Zhao ◽  
Yue Sun ◽  
Wen Liu
Keyword(s):  
Quantum Dots ◽  
Gold Nanoparticles ◽  
Carbon Quantum Dots ◽  
Sensing System

The Resolution and Contrast in Biological Sections Determined by Inelastic and Elastic Scattering

1973 ◽  
Vol 31 ◽  
pp. 224-225
Author(s):  
D. L. Misell
Keyword(s):  
Electron Microscopy ◽  
Adverse Effect ◽  
Elastic Scattering ◽  
Inelastic Scattering ◽  
Amorphous Carbon ◽  
Polymeric Materials ◽  
Chromatic Aberration ◽  
Image Resolution ◽  
Quantitative Estimates ◽  
Elastic Ratio

In the electron microscopy of biological sections the adverse effect of chromatic aberration on image resolution is well known. In this paper calculations are presented for the inelastic and elastic image intensities using a wave-optical formulation. Quantitative estimates of the deterioration in image resolution as a result of chromatic aberration are presented as an alternative to geometric calculations. The predominance of inelastic scattering in the unstained biological and polymeric materials is shown by the inelastic to elastic ratio, I/E, within an objective aperture of 0.005 rad for amorphous carbon of a thickness, t=50nm, typical of biological sections; E=200keV, I/E=16.

Eligible or Ineligible: Determining Adverse Effect

2002 ◽  
Vol 3 (2) ◽  
pp. 26-28
Author(s):  
Linda S. Bowman ◽  
C. Al Bowman ◽  
Rita L. Bailey
Keyword(s):  
Adverse Effect
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