scholarly journals Label-free colorimetric detection of glutathione by autocatalytic oxidation of o-phenylenediamine based on Au3+ regulation and its application

2021 ◽  
Author(s):  
Shaoguang Li ◽  
Huilin Liu ◽  
Xiaoying Zhang ◽  
Jiasong Cai ◽  
Kunlong Huang ◽  
...  
Keyword(s):  
Colorimetric Assay ◽  
Colorimetric Detection ◽  
Label Free ◽  
Highly Sensitive ◽  
Autocatalytic Oxidation

A label-free, rapid, and highly sensitive colorimetric assay for the detection of glutathione (GSH) was developed.

Gold nanoparticle-based exonuclease III signal amplification for highly sensitive colorimetric detection of folate receptor

Nanoscale ◽  
2014 ◽  
Vol 6 (6) ◽  
pp. 3055-3058 ◽  
Author(s):  
Xinjian Yang ◽  
Zhiqiang Gao
Keyword(s):  
Gold Nanoparticles ◽  
Small Molecule ◽  
Signal Amplification ◽  
Colorimetric Assay ◽  
Folate Receptor ◽  
Colorimetric Detection ◽  
Label Free ◽  
Exonuclease Iii ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

By combining terminal protection of small molecule (folate)-capped DNA probes, exonuclease III signal amplification and gold nanoparticles, we developed a simple and label-free colorimetric assay for highly sensitive detection of folate receptor.

scholarly journals Label-Free Colorimetric Detection of Urine Glucose Based on Color Fading Using Smartphone Ambient-Light Sensor

Chemosensors ◽  
2020 ◽  
Vol 8 (1) ◽  
pp. 10 ◽  
Author(s):  
Wang ◽  
Guo ◽  
Hu ◽  
Liang ◽  
Li ◽  
...  
Keyword(s):  
Limit Of Detection ◽  
Colorimetric Assay ◽  
Point Of Care ◽  
Colorimetric Detection ◽  
Diabetic Patients ◽  
Ambient Light ◽  
Label Free ◽  
Urine Glucose ◽  
Light Sensor

In this work, a label-free colorimetric assay was developed for the determination of urine glucose using smartphone ambient-light sensor (ALS). Using horseradish peroxidase—hydrogen peroxide—3,3′,5,5′-tetramethylbenzidine (HRP-H2O2-TMB) colored system, quantitative H2O2 was added to samples to-be-determined for deepest color. The presence of glucose oxidase in urine led to the formation of H2O2 and the reduction of TMBred. As a result of this, the color of the urine faded and the solution changed from deep blue to light blue. We measured the illuminance of the transmitted light by a smartphone ambient light sensor, and thereby color changes were used to calculate the content of urine glucose. After method validation, this colorimetric assay was practically applied for the determination of urine samples from diabetic patients. Good linearity was obtained in the range of 0.039–10.000 mg/mL (R2 = 0.998), and a limit of detection was 0.005 mg/mL. Our method was had high accuracy, sensitivity, simplicity, rapidity, and visualization, providing a new sensor to be potentially applicable for point-of-care detection of urine glucose.

An ultrasensitive label-free colorimetric assay for glutathione based on Ag+ regulated autocatalytic oxidation of o-phenylenediamine

Talanta ◽  
2018 ◽  
Vol 186 ◽  
pp. 330-336 ◽  
Author(s):  
Fang Li ◽  
Jiachang Liu ◽  
Yuting Hu ◽  
Ning Deng ◽  
Jianbo He
Keyword(s):  
Colorimetric Assay ◽  
Label Free ◽  
Autocatalytic Oxidation

scholarly journals Development of label-free gold nanoparticle based rapid colorimetric assay for clinical/point-of-care screening of cervical cancer

2020 ◽  
Vol 2 (12) ◽  
pp. 5737-5745
Author(s):  
Tejaswini Appidi ◽  
Sushma V. Mudigunda ◽  
Suseela Kodandapani ◽  
Aravind Kumar Rengan
Keyword(s):  
Cervical Cancer ◽  
Gold Nanoparticles ◽  
Gold Nanoparticle ◽  
Colorimetric Assay ◽  
Point Of Care ◽  
Colorimetric Detection ◽  
Label Free ◽  
Free Gold ◽  
Clinical Point

“C-ColAur” technique for colorimetric detection of cervical cancer by in situ formation of gold nanoparticles.

scholarly journals Highly Sensitive Colorimetric Detection of Ochratoxin A by a Label-Free Aptamer and Gold Nanoparticles

Toxins ◽  
2015 ◽  
Vol 7 (12) ◽  
pp. 5377-5385 ◽  
Author(s):  
Yunxia Luan ◽  
Jiayi Chen ◽  
Cheng Li ◽  
Gang Xie ◽  
Hailong Fu ◽  
...  
Keyword(s):  
Gold Nanoparticles ◽  
Ochratoxin A ◽  
Colorimetric Detection ◽  
Label Free ◽  
Highly Sensitive

Terminal protection of small molecule-linked ssDNA for label-free and highly sensitive colorimetric detection of folate receptor biomarkers

RSC Advances ◽  
2015 ◽  
Vol 5 (8) ◽  
pp. 6100-6105 ◽  
Author(s):  
Xue Gong ◽  
Wenjiao Zhou ◽  
Yaqin Chai ◽  
Yun Xiang ◽  
Ruo Yuan
Keyword(s):  
Small Molecule ◽  
Folate Receptor ◽  
Colorimetric Detection ◽  
Sensitive Detection ◽  
Label Free ◽  
Folate Receptors ◽  
Color Transition ◽  
Highly Sensitive

Protection of ssDNA from digesting by Exo I generates amplified color transition for label-free and sensitive detection of folate receptors.

A G-quadruplex-based colorimetric assay of S1 nuclease activity and inhibition

2015 ◽  
Vol 7 (13) ◽  
pp. 5600-5605 ◽  
Author(s):  
Bingfang Shi ◽  
Yingfeng Qin ◽  
Mengjiao Huang ◽  
Jingjin Zhao ◽  
Yubin Su ◽  
...  
Keyword(s):  
Colorimetric Assay ◽  
Nuclease Activity ◽  
Label Free ◽  
Specific Detection ◽  
S1 Nuclease ◽  
Highly Sensitive ◽  
G Quadruplex

A label-free colorimetric assay based on the catalysis of G-quadruplex/hemin DNAzyme was developed for highly sensitive and specific detection of S1 nuclease activity and inhibition.

Highly sensitive detection of CpG methylation in genomic DNA by AuNP-based colorimetric assay with ligase chain reaction

2015 ◽  
Vol 51 (16) ◽  
pp. 3371-3374 ◽  
Author(s):  
Fengxia Su ◽  
Limei Wang ◽  
Yueying Sun ◽  
Chenghui Liu ◽  
Xinrui Duan ◽  
...  
Keyword(s):  
Dna Methylation ◽  
Genomic Dna ◽  
Colorimetric Assay ◽  
Colorimetric Detection ◽  
Cpg Methylation ◽  
Chain Reaction ◽  
Selective Method ◽  
Ligase Chain Reaction ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

Using LCR amplification and AuNP-based colorimetric detection, a highly sensitive and selective method for detection of DNA methylation has been developed.

High-throughput and ultratrace naked-eye colorimetric detection of Au3+ based on the gold amalgam-stimulated peroxidase mimetic activity in aqueous solutions

2017 ◽  
Vol 53 (36) ◽  
pp. 5056-5058 ◽  
Author(s):  
Shouting Zhang ◽  
Zhuoyue Zhang ◽  
Tiansheng Wang ◽  
Dongxu Zhang ◽  
Xuemei Li ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
High Throughput ◽  
Colorimetric Assay ◽  
Colorimetric Detection ◽  
Label Free ◽  
Efficient Strategy ◽  
Naked Eye ◽  
Peroxidase Mimetic

Herein, we present a catalysis-based, label-free, and efficient strategy for a rapid, high-throughput, highly selective and ultrasensitive naked-eye colorimetric assay of Au3+ in aqueous solutions, based on the gold amalgam-stimulated peroxidase mimetic activity.

Highly sensitive, label-free colorimetric assay of trypsin using silver nanoparticles

2013 ◽  
Vol 49 ◽  
pp. 20-24 ◽  
Author(s):  
Peng Miao ◽  
Tao Liu ◽  
Xiaoxi Li ◽  
Limin Ning ◽  
Jian Yin ◽  
...  
Keyword(s):  
Silver Nanoparticles ◽  
Colorimetric Assay ◽  
Label Free ◽  
Highly Sensitive
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