نتایج جستجو برای: colorimetric aptasensor

تعداد نتایج: 10653  

Journal: :Organic & biomolecular chemistry 2015
Atsushi Ogawa Junichiro Tabuchi

We have developed a novel type of biofunction-assisted aptasensor that harnesses ligand-dependent 3' processing of a premature amber suppressor tRNA and the subsequent amber suppression of a reporter gene in a wheat germ extract.

Journal: :The Analyst 2014
Yunfeng Bai Feng Feng Lu Zhao Zezhong Chen Haiyan Wang Yali Duan

A simple, sensitive and selective turn-on fluorescent aptasensor for adenosine detection was developed based on target-induced split aptamer fragment conjunction and different interactions of graphene oxide and the two states of the designed aptamer sequences.

Journal: :Chemical communications 2015
Yu Zheng Tao Hu Chuanxia Chen Fan Yang Xiurong Yang

An anti-fouling surface was designed to effectively resist nonspecific protein adsorption using dual polarization interferometry, based on which the aptasensor for detection of thrombin was fabricated according to the specific interaction between thrombin and its 15-mer aptamer.

Journal: :Chemical communications 2008
Tao Li Erkang Wang Shaojun Dong

With a designed high-activity DNAzyme as the catalytic label, an ultrasensitive chemiluminescence thrombin aptasensor is developed, enabling a 10- to 100-fold improvement in the detection sensitivity as compared with previous counterparts.

Journal: :The Analyst 2015
Jing Qian Kan Wang Chengquan Wang Mengjuan Hua Zhenting Yang Qian Liu Hanping Mao Kun Wang

A color change observable by the naked eye to indicate the content of an analyte is considered to be the most conceivable way of various sensing protocols. By taking advantage of the Förster resonance energy transfer (FRET) principles, we herein designed a dual-emission ratiometric fluorescent aptasensor for ochratoxin A (OTA) detection via a dual mode of fluorescent sensing and onsite visual s...

Journal: :The Analyst 2015
Xiang Huang Yuqin Li Xiaoshan Zhang Xin Zhang Yaowen Chen Wenhua Gao

An efficient aptasensor was developed in which graphene oxide (GO) was employed as an indicator for both electrochemical impedance spectroscopy and electrochemiluminescence (ECL) signal generation. The aptasensor was fabricated by self-assembling the ECL probe of a thiolated adenosine triphosphate binding aptamer (ABA) tagged with a Ru complex (Ru(bpy)3(2+) derivatives) onto the surface of gold...

Journal: :Colloids and Surfaces A: Physicochemical and Engineering Aspects 2021

The Meisenheimer charge transfer reaction has, for many years, been the predominant mode of interaction to detect explosive compounds via naked eye. However, this method is majorly sensitive 2,4,6-trinitrotoluene and insensitive other compounds. In work, we report on development a novel aptamer-based amphiphilic polymer-coated Fe-doped ceria/gold (Au) hybrid nanocomposite (NC) as peroxidase mim...

2018
Cheng Zhang Xiaowen Dou Lei Zhang Meifeng Sun Ming Zhao Zhen OuYang Dandan Kong F. Logrieco Antonio Meihua Yang

Aflatoxin B₁ (AFB₁) is a very hazardous carcinogen, readily contaminating foodstuffs and traditional Chinese medicines (TCMs) that has inspired increasing health concerns due to dietary exposure. Colloidal nanocrystals have been proposed as optical labels for aptasensor assembly, but these typically require tedious multistep conjugation and suffer from unsatisfactory robustness when used for co...

2014
Dan Chen Dongsheng Yao Chunfang Xie Daling Liu

Developing the rapid, simple and sensitive biosensor system for tetracycline detection is very important in food safety. In this paper, we developed a label-free aptasensor for electrochemical detection of tetracycline. The reorganization of tetracycline binding aptamer was confirmed by Isothermal Titration Calorimetry, Kd 1⁄4 5.18 10 5 mol L 1. According to the electrochemical impendence spect...

Journal: :Biosensors & bioelectronics 2018
Jingyi Luo Danfeng Jiang Tao Liu Jingmeng Peng Zhenyu Chu Wanqin Jin

In this work, a novel sandwich-type aptasensor was designed for the ultrasensitive recognition of trace mercury ions in water. Numerous oriented platinum nanotube arrays (PtNAs) were in-situ crystallized on a flexible electrode as a sensing interface, while thionine labelled Fe3O4/rGO nanocomposites as signal amplifiers. Both PtNAs/CF and nanocomposites were synthesized by easy hydrothermal pro...

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