scholarly journals Nanozyme-Participated Biosensing of Pesticides and Cholinesterases: A Critical Review

Biosensors ◽  
2021 ◽  
Vol 11 (10) ◽  
pp. 382
Author(s):  
Hengjia Zhu ◽  
Peng Liu ◽  
Lizhang Xu ◽  
Xin Li ◽  
Panwang Hu ◽  
...  
Keyword(s):  
Environmental Remediation ◽  
Low Cost ◽  
Catalytic Performance ◽  
Agricultural Products ◽  
Detection Methods ◽  
Highly Sensitive ◽  
Potential Applications ◽  
Highly Sensitive Detection ◽  
Excellent Stability

To improve the output and quality of agricultural products, pesticides are globally utilized as an efficient tool to protect crops from insects. However, given that most pesticides used are difficult to decompose, they inevitably remain in agricultural products and are further enriched into food chains and ecosystems, posing great threats to human health and the environment. Thus, developing efficient methods and tools to monitor pesticide residues and related biomarkers (acetylcholinesterase and butylcholinesterase) became quite significant. With the advantages of excellent stability, tailorable catalytic performance, low cost, and easy mass production, nanomaterials with enzyme-like properties (nanozymes) are extensively utilized in fields ranging from biomedicine to environmental remediation. Especially, with the catalytic nature to offer amplified signals for highly sensitive detection, nanozymes were finding potential applications in the sensing of various analytes, including pesticides and their biomarkers. To highlight the progress in this field, here the sensing principles of pesticides and cholinesterases based on nanozyme catalysis are definitively summarized, and emerging detection methods and technologies with the participation of nanozymes are critically discussed. Importantly, typical examples are introduced to reveal the promising use of nanozymes. Also, some challenges in the field and future trends are proposed, with the hope of inspiring more efforts to advance nanozyme-involved sensors for pesticides and cholinesterases.

scholarly journals Optical Monitoring of the Production Quality of Si-Nanoribbon Chips Intended for the Detection of ASD-Associated Oligonucleotides

Micromachines ◽  
2021 ◽  
Vol 12 (2) ◽  
pp. 147
Author(s):  
Kristina A. Malsagova ◽  
Tatyana O. Pleshakova ◽  
Vladimir P. Popov ◽  
Igor N. Kupriyanov ◽  
Rafael A. Galiullin ◽  
...  
Keyword(s):  
Production Quality ◽  
Autism Spectrum ◽  
Covalent Immobilization ◽  
Biological Macromolecules ◽  
Label Free ◽  
Raman Scattering Spectroscopy ◽  
Dna Oligonucleotides ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

Gas-phase etching and optical lithography were employed for the fabrication of a silicon nanoribbon chip (Si-NR chip). The quality of the so-fabricated silicon nanoribbons (Si-NRs) was monitored by optical Raman scattering spectroscopy. It was demonstrated that the structures of the Si-NRs were virtually defect-free, meaning they could be used for highly sensitive detection of biological macromolecules. The Si-NR chips were then used for the highly sensitive nanoelectronics detection of DNA oligonucleotides (oDNAs), which represent synthetic analogs of 106a-5p microRNA (miR-106a-5p), associated with the development of autism spectrum disorders in children. The specificity of the analysis was attained by the sensitization of the Si-NR chip sur-face by covalent immobilization of oDNA probes, whose nucleotide sequence was complementary to the known sequence of miR-106a-5p. The use of the Si-NR chip was demonstrated to al-low for the rapid label-free real-time detection of oDNA at ultra-low (~10−17 M) concentrations.

Highly sensitive detection of Cr(vi) in groundwater by bimetallic NiFe nanoparticles

2017 ◽  
Vol 9 (6) ◽  
pp. 1031-1037 ◽  
Author(s):  
Jingtao Liu ◽  
Yu Ding ◽  
Lifei Ji ◽  
Xin Zhang ◽  
Fengchun Yang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Hexavalent Chromium ◽  
Low Cost ◽  
High Sensitivity ◽  
Sensitive Detection ◽  
Toxic Heavy Metal ◽  
Metal Pollutants ◽  
Highly Sensitive ◽  
Highly Sensitive Detection ◽  
Heavy Metal Pollutants

Hexavalent chromium (Cr(vi)) is one of the most toxic heavy metal pollutants in groundwater, and thus the detection of Cr(vi) with high sensitivity, accuracy, and simplicity and low cost is of great importance.

A novel NIR fluorescent probe for highly sensitive detection of HNO and its application in bioimaging

2021 ◽  
Author(s):  
shenwei he ◽  
Jianming Zhu ◽  
peiyao xie ◽  
Jianfei Liu ◽  
Di Zhang ◽  
...  
Keyword(s):  
Fluorescent Probe ◽  
Reactive Nitrogen Species ◽  
Physiological Process ◽  
Sensitive Detection ◽  
Detection Methods ◽  
Reactive Nitrogen ◽  
Nitrogen Species ◽  
Efficient Detection ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

Nitroxyl (HNO) as an important reactive nitrogen species (RNS), which plays an important role in multiple physiological process. Therefore, it is urgent to exploit reliable and efficient detection methods for...

scholarly journals Development of Low-Cost AuNP-Based Aptasensors with Truncated Aptamer for Highly Sensitive Detection of 8-Oxo-dG in Urine

ACS Omega ◽  
2020 ◽  
Vol 5 (28) ◽  
pp. 17423-17430
Author(s):  
Piyaporn Matulakul ◽  
Drusawin Vongpramate ◽  
Sirinan Kulchat ◽  
Apiwat Chompoosor ◽  
Raynoo Thanan ◽  
...  
Keyword(s):  
Low Cost ◽  
Sensitive Detection ◽  
Highly Sensitive ◽  
Highly Sensitive Detection

Driving force to detect Alzheimer's disease biomarkers: application of a thioflavine T@Er-MOF ratiometric fluorescent sensor for smart detection of presenilin 1, amyloid β-protein and acetylcholine

The Analyst ◽  
2020 ◽  
Vol 145 (13) ◽  
pp. 4646-4663
Author(s):  
Xing Ze Wang ◽  
Jing Du ◽  
Nan Nan Xiao ◽  
Yan Zhang ◽  
Ling Fei ◽  
...  
Keyword(s):  
Driving Force ◽  
Fluorescent Sensor ◽  
Low Cost ◽  
Amyloid Β ◽  
Amyloid Β Protein ◽  
Disease Biomarkers ◽  
Β Protein ◽  
Highly Sensitive ◽  
Highly Sensitive Detection ◽  
Detection Strategies

ThT@Er-MOF has been successfully applied in highly sensitive detection of three main Alzheimer Disease biomarkers through three different low cost and facile detection strategies.

Increasing the value of a biorefinery based on hot-water extraction: Lignin products

TAPPI Journal ◽  
2012 ◽  
Vol 11 (1) ◽  
pp. 19-26 ◽  
Author(s):  
BILJANA M. BUJANOVIC ◽  
MANGESH J. GOUNDALKAR ◽  
THOMAS E. AMIDON
Keyword(s):  
Carbon Fibers ◽  
Aromatic Compounds ◽  
Low Cost ◽  
Hot Water ◽  
Water Extraction ◽  
Hot Water Extraction ◽  
Isolation And Characterization ◽  
Potential Applications

In conventional pulping technologies, lignin is used mainly as a low-cost source of energy. Small quantities of industrially produced lignin are used for the production of chemicals and materials. Biorefinery technologies are emerging that have an ultimate goal of replacing fossil sources for the production of fuels and other products. To achieve this goal effectively, biorefinery technologies must take advantage of lignin as the most abundant natural aromatic polymer and use it to add higher-value products to product portfolios. Lignin has the potential to be used in making a broad range of high-quality products, including carbon fibers, thermoplastics, and oxygenated aromatic compounds. Existing processes focus primarily on the quality of cellulose and result in a severely modified and contaminated lignin of relatively low value. Lignin produced in more flexible biorefinery operations is more uniform and less contaminated than currently available industrial lignins, opening the door for broader applications of lignin and lignin products. The results of isolation and characterization of lignin dissolved during hot-water extraction and some potential applications of this lignin are discussed.

Transparent Ultraviolet Photodetectors Based on Ga2O3 Electrospun Nanowires

2018 ◽  
Vol 281 ◽  
pp. 710-715
Author(s):  
Muhammad Shahid ◽  
Tian Jun Li ◽  
Meng Fei Zhang ◽  
Jing Cheng ◽  
Yan Xing ◽  
...  
Keyword(s):  
Uv Light ◽  
Low Cost ◽  
Electrospun Nanofibers ◽  
High Transparency ◽  
Highly Sensitive ◽  
Electrospinning Method ◽  
Low Dimensional ◽  
Ultraviolet Photodetectors ◽  
High Photosensitivity ◽  
Excellent Stability

Ultraviolet photodetectors (PDs) based on low-dimensional (LD) gallium oxide nanofibers were synthesized and assembled by a low cost and scalable electrospinning method. Highly uniaxially aligned nanofibers were used to assemble photodetectors. Photoconductive investigations indicate that the prepared photodetectors (PDs) are highly sensitive to ultraviolet (UV) light. The prepared photodetectors have shown a high photosensitivity (103), fast photoresponse, excellent stability, and reproducibility under the illumination of UV light 254 nm. These electrospun nanofibers have also shown a high transparency (<85%) in the visible light 400-700 nm range. The high transparency of these nanobelts demonstrates their use for invisible UV photosensors.

Electrochemiluminescence Detection of Diphenhydramine Based on Tris(2,2-bipyridyl) Ruthenium(II) Immobilized on PEDOT-PSS Modified Electrode by Electrostatic Attraction Strategy

2014 ◽  
Vol 881-883 ◽  
pp. 169-172 ◽  
Author(s):  
Qian Xiang ◽  
Xiao Dong Yang ◽  
Ying Gao ◽  
Ling Yun Tian ◽  
Juan Tang ◽  
...  
Keyword(s):  
Detection Limit ◽  
Composite Film ◽  
Electrostatic Attraction ◽  
Polystyrene Sulfonate ◽  
Direct Proportion ◽  
Ito Electrode ◽  
Highly Sensitive ◽  
Tin Oxides ◽  
Potential Applications ◽  
Highly Sensitive Detection

An electrochemiluminescence (ECL) sensor for highly sensitive detection of diphenhydramine was developed by employing tris (2,2-bipyridyl) ruthenium (II) as the detector. The ECL sensor was fabricated by immobilizing ECL reagent Ru (bpy)32+ on the poly-(3,4-ethylene dioxythiophene) and polystyrene sulfonate composite film (PEDOT-PSS) modified indium tin oxides (ITO) electrode by electrostatic attraction strategy. The ECL sensor showed an increased ECL intensity in the presence of diphenhydramine. The increased ECL intensity was direct proportion to the concentration of diphenhydramine over a range from 5.0 ×10-4 to 5.0 ×10-6 mol/L. The detection limit for the detection of diphenhydramine was 1.0 ×10-6 mol/L. Fabrication of the ECL sensor by this method is simple and easy, and hence has potential applications in the field of ECL analysis and detection.

scholarly journals Biosensors for Deoxynivalenol and Zearalenone Determination in Feed Quality Control

Toxins ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 499
Author(s):  
Krisztina Majer-Baranyi ◽  
Nóra Adányi ◽  
András Székács
Keyword(s):  
Sensitive Detection ◽  
Farm Animals ◽  
Detection Methods ◽  
Sample Treatment ◽  
Minimal Sample ◽  
Current Trends ◽  
Highly Sensitive ◽  
Feed Analysis ◽  
Highly Sensitive Detection ◽  
Analytical Tools

Mycotoxin contamination of cereals used for feed can cause intoxication, especially in farm animals; therefore, efficient analytical tools for the qualitative and quantitative analysis of toxic fungal metabolites in feed are required. Current trends in food/feed analysis are focusing on the application of biosensor technologies that offer fast and highly selective and sensitive detection with minimal sample treatment and reagents required. The article presents an overview of the recent progress of the development of biosensors for deoxynivalenol and zearalenone determination in cereals and feed. Novel biosensitive materials and highly sensitive detection methods applied for the sensors and the application of these sensors to food/feed products, the limit, and the time of detection are discussed.

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