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Sensing Technology in Bioelectrochemical Analysis

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A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Biosensors".

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 2390

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Dear Colleagues,

Electrochemical analysis has many advantages, including fast and sensitive detection of selected analytes. This method can be used for biological applications, including detection of very dangerous pathogens such as viruses (e.g., Ebola, influenza, ASFV, coronaviruses, etc.) and antibiotic-resistant bacterial strains, and for diagnostics of other diseases, including tumor diseases. Various nanomaterials, nanocomposites, nanoparticles, and electrode modifications can be used in detection systems.

Prof. Rene Kizek
Dr. Bozena Hosnedlova
Guest Editors

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Keywords

sensors for bacteria
sensors for viruses
sensors for fungi
DNA sensing
protein sensing
electrode modification
nanomaterials for sensing
nanomaterials in bioelectrochemical detection
nanomedicine applications
tumor diseases

Published Papers (1 paper)

Research

14 pages, 1619 KiB

Open AccessArticle

Construction of a Ginseng Root-Meristem Sensor and a Sensing Kinetics Study on the Main Nitrogen Nutrients

by Shiang Wang, Dingqiang Lu and Guangchang Pang

Sensors 2021, 21(3), 681; https://doi.org/10.3390/s21030681 - 20 Jan 2021

Cited by 2 | Viewed by 1774

Abstract

Severe continuous cropping obstacles exist in ginseng cultivation. In order to assess these obstacles, a “sandwich” ginseng root tissue sensor was developed for the kinetic determination of five nitrogen nutrients. The results showed that the sensing parameters of the sensor reached an ultrasensitive level (limit of detection up to 5.451 × 10⁻²⁴ mol/L) for the five nitrogen nutrients, and exhibited good stability and reproducibility. In the order of two-, four-, and six-year-old ginseng plants, the sensitivity to inorganic nitrogen nutrients (sodium nitrate and urea) showed an upward trend following an initial decline (the interconnected allosteric constant Ka values acted as the parameter). The fluctuations in sensor sensitivity to organic nitrogen nutrients, specifically nucleotides (disodium inosinate and disodium guanylate), were relatively small. The sensor sensitivity of two-, four-, and six-year-old ginseng plants to sodium glutamate was 9.277 × 10⁻¹⁹ mol/L, 6.980 × 10⁻²¹ mol/L, and 5.451 × 10⁻²⁴ mol/L, respectively. Based on the survival rate of the seedlings and mortality rate of the ginseng in each age group, a Hardy–Weinberg equilibrium analysis was carried out. The results showed that the sensing ability of the root system to sodium glutamate may be an important factor affecting its survival under continuous cropping obstacles with increasing age. Full article

(This article belongs to the Special Issue Sensing Technology in Bioelectrochemical Analysis)

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