Results 31 to 40 of about 2,208,157 (360)

CRISPR-Cas12a-Based Nucleic Acid Amplification-Free DNA Biosensor via Au Nanoparticle-Assisted Metal-Enhanced Fluorescence and Colorimetric Analysis.

open access: yesNano letters (Print), 2020
Cell-free DNA (cfDNA) has attracted significant attention due to its high potential to diagnose diseases, such as cancer. Still, its detection by amplification method has limitations because of false-positive signals and difficulty in designing target ...
Jin-Ha Choi   +4 more
semanticscholar   +1 more source

A novel colorimetric biosensor based on non-aggregated Au@Ag core–shell nanoparticles for methamphetamine and cocaine detection [PDF]

open access: yes, 2017
We report a novel colorimetric biosensor based on non-aggregation Au@Ag core-shell nanoparticles to detect methamphetamine and cocaine. The biosensor consisted of a reporter probe (RP) that is a specific single-stranded DNA (ssDNA) sequence coated on Au ...
Hu, Jiming   +5 more
core   +1 more source

Ultrasensitive Biosensor for the Detection of Vibrio cholerae DNA with Polystyrene-co-acrylic Acid Composite Nanospheres

open access: yesNanoscale Research Letters, 2017
An ultrasensitive electrochemical biosensor for the determination of pathogenic Vibrio cholerae (V. cholerae) DNA was developed based on polystyrene-co-acrylic acid (PSA) latex nanospheres-gold nanoparticles composite (PSA-AuNPs) DNA carrier matrix ...
Mahbubur Rahman   +3 more
doaj   +1 more source

Electrochemical DNA Biosensor for Mycobacterium leprae Identification

open access: yesBrazilian Archives of Biology and Technology, 2021
Nowadays, a prompt and reliable diagnosis is one of the most critical measures for leprosy control. The current diagnostic is based on clinical exams by a health care professional, and it may not recognize early signs of the disease.
André Santiago Afonso   +2 more
doaj   +1 more source

Nanomaterials for Healthcare Biosensing Applications [PDF]

open access: yes, 2019
In recent years, an increasing number of nanomaterials have been explored for their applications in biomedical diagnostics, making their applications in healthcare biosensing a rapidly evolving field.
Altintas, Zeynep, Pirzada, Muqsit
core   +1 more source

An ultrasensitive photoelectrochemical nucleic acid biosensor [PDF]

open access: yes, 2005
A simple and ultrasensitive procedure for non-labeling detection of nucleic acids is described in this study. It is based on the photoelectrochemical detection of target nucleic acids by forming a nucleic acid/photoreporter adduct layer on an ITO ...
Gao, Zhiqiang, Tansil, Natalia C.
core   +3 more sources

Gas Biosensor Arrays Based on Single-Stranded DNA-Functionalized Single-Walled Carbon Nanotubes for the Detection of Volatile Organic Compound Biomarkers Released by Huanglongbing Disease-Infected Citrus Trees. [PDF]

open access: yes, 2019
Volatile organic compounds (VOCs) released by plants are closely associated with plant metabolism and can serve as biomarkers for disease diagnosis. Huanglongbing (HLB), also known as citrus greening or yellow shoot disease, is a lethal threat to the ...
Liu, Gang   +6 more
core   +2 more sources

Photoelectrochemical biosensor based on SiW12@CdS quantum dots for the highly sensitive detection of HPV 16 DNA

open access: yesFrontiers in Bioengineering and Biotechnology, 2023
A highly sensitive biosensor for detecting HPV 16 DNA was prepared based on Keggin-type polyoxometalate (SiW12)-grafted CdS quantum dots (SiW12@CdS QDs) and colloidal gold nanoparticles (Au NPs), which exhibited remarkable selectivity and sensitivity ...
Yao Cheng   +12 more
doaj   +1 more source

Three-dimensional modeling of single stranded DNA hairpins for aptamer-based biosensors. [PDF]

open access: yes, 2017
Aptamers consist of short oligonucleotides that bind specific targets. They provide advantages over antibodies, including robustness, low cost, and reusability.
Jeddi, Iman, Saiz, Leonor
core   +2 more sources

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