Chemical Plume Tracking. 3. Ascorbic Acid:  A Biologically Relevant Marker

Using autonomous robot to detect chemical emissions and track plumes caused by fire, toxic gas leakage and explosive at their early stages, and swiftly localize their sources can avoid risking human health and potentially save lives. The benefits of deploying autonomous robot(s) rather than human beings in performing such hazardous tasks are obvious. Even though using real robots to research, develop, and experiment in real environment are normally preferred, modelling and simulation are indeed sometimes better options when such as a consistent and repeatable complex environment with controllable variables (i.e. wind velocity and plume propagation in this case) for experiments is important. This chapter presents one out of many possible modelling and simulation approaches for the research related to chemical plume tracking and source localization using robots, and covers the modelling of robot, the modelling of the environment, and the integration of both to become a platform.

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3D moth-inspired chemical plume tracking

2015 IEEE International Conference on Robotics and Biomimetics (ROBIO) ◽

10.1109/robio.2015.7419031 ◽

2015 ◽

Cited By ~ 1

Author(s):

Bo Gao ◽

Hongbo Li ◽

Fuchun Sun

Keyword(s):

Plume Tracking ◽

Chemical Plume

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Chemical Plume Tracking. 1. Chemical Information Encoding

Analytical Chemistry ◽

10.1021/ac0101813 ◽

2001 ◽

Vol 73 (15) ◽

pp. 3662-3668 ◽

Cited By ~ 13

Author(s):

Timo Kikas ◽

Hiroshi Ishida ◽

Donald R. Webster ◽

Jiří Janata

Keyword(s):

Chemical Information ◽

Information Encoding ◽

Plume Tracking ◽

Chemical Plume

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Potentiometric Biosensing of Ascorbic Acid, Uric Acid, and Cysteine in Microliter Volumes Using Miniaturized Nanoporous Gold Electrodes

Biosensors ◽

10.3390/bios11010010 ◽

2020 ◽

Vol 11 (1) ◽

pp. 10

Author(s):

Christopher J. Freeman ◽

Borkat Ullah ◽

Md. Shafiul Islam ◽

Maryanne M. Collinson

Keyword(s):

Ascorbic Acid ◽

Uric Acid ◽

Surface Area ◽

High Surface ◽

High Surface Area ◽

Nanoporous Gold ◽

Redox Potentials ◽

Biologically Relevant ◽

Redox Sensing ◽

Redox Molecules

Potentiometric redox sensing is a relatively inexpensive and passive approach to evaluate the overall redox state of complex biological and environmental solutions. The ability to make such measurements in ultra-small volumes using high surface area, nanoporous electrodes is of particular importance as such electrodes can improve the rates of electron transfer and reduce the effects of biofouling on the electrochemical signal. This work focuses on the fabrication of miniaturized nanoporous gold (NPG) electrodes with a high surface area and a small footprint for the potentiometric redox sensing of three biologically relevant redox molecules (ascorbic acid, uric acid, and cysteine) in microliter volumes. The NPG electrodes were inexpensively made by attaching a nanoporous gold leaf prepared by dealloying 12K gold in nitric acid to a modified glass capillary (1.5 mm id) and establishing an electrode connection with copper tape. The surface area of the electrodes was ~1.5 cm2, providing a roughness factor of ~16 relative to the geometric area of 0.09 cm2. Scanning electron microscopy confirmed the nanoporous framework. A linear dependence between the open-circuit potential (OCP) and the logarithm of concentration (e.g., Nernstian-like behavior) was obtained for all three redox molecules in 100 μL buffered solutions. As a first step towards understanding a real system, the response associated with changing the concentration of one redox species in the presence of the other two was examined. These results show that at NPG, the redox potential of a solution containing biologically relevant concentrations of ascorbic acid, uric acid, and cysteine is strongly influenced by ascorbic acid. Such information is important for the measurement of redox potentials in complex biological solutions.

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A survey of biologically inspired chemical plume tracking strategies for single robot in 2-D turbulence dominated flow environments

2011 IEEE/SICE International Symposium on System Integration (SII) ◽

10.1109/sii.2011.6147472 ◽

2011 ◽

Cited By ~ 1

Author(s):

Siqi Zhang ◽

Demin Xu

Keyword(s):

Biologically Inspired ◽

Plume Tracking ◽

Chemical Plume

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Modeling and Numerical Simulation Analysis of Chemical Plume in Flow Field

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.971-973.93 ◽

2014 ◽

Vol 971-973 ◽

pp. 93-97

Author(s):

Xiang Yao Meng ◽

Zhi Ming Qiu ◽

Peng Zhang

Keyword(s):

Flow Field ◽

Transport Process ◽

Theoretical Basis ◽

Simulation Analysis ◽

Current Model ◽

Chemical Substances ◽

Plume Tracking ◽

Discrete Phase ◽

Simulation Results ◽

Chemical Plume

A new discrete chemical plume model based on CFD was established, which avoids the shortcomings of the current model. In this model CFD was applied to simulate the turbulent environment of chemical plume, while the chemical substances contained in the plume were modeled as discrete phase. Utilizing this model, chemical plume under water was simulated numerically and analyzed hereafter. The transport characteristics of simulated plume were consistent with existing experimental results. Based on the simulation results, the effect of flow field on plume transport was also analyzed. The model proves an efficient approach to simulate the transport process in different environment, as well as analyze various types of actual situations. Moreover, this model can provide the theoretical basis for plume tracking algorithm research and simulation platform, which promotes significantly the research on chemical plume tracking.

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