Fluctuation Analysis of Redox Potential to Distinguish Microbial Fe(II) Oxidation
| Autor: | F. G. Ferris, Allison M. L. Enright |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0301 basic medicine
Abiotic component Time Factors 010504 meteorology & atmospheric sciences Bacteria Chemistry Iron 030106 microbiology Analytical chemistry 01 natural sciences Agricultural and Biological Sciences (miscellaneous) Reference electrode Chemical reaction Redox 03 medical and health sciences Kinetics Space and Planetary Science Electrode Detrended fluctuation analysis Groundwater discharge Scaling Electrodes Oxidation-Reduction 0105 earth and related environmental sciences |
| Zdroj: | Astrobiology. 16(11) |
| ISSN: | 1557-8070 |
| Popis: | We developed a novel method for distinguishing abiotic and biological iron oxidation in liquid media using oxidation-reduction (redox) potential time series data. The instrument and processing algorithm were tested by immersing the tip of a Pt electrode with an Ag-AgCl reference electrode into an active iron-oxidizing biofilm in a groundwater discharge zone, as well as in two abiotic systems: a killed sample and a chemical control from the same site. We used detrended fluctuation analysis to characterize average root mean square fluctuation behavior, which was distinct in the live system. The calculated α value scaling exponents determined by detrended fluctuation analysis were significantly different at p |
| Databáze: | OpenAIRE |
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