In Situ Formed Gradient Bandgap‐Tunable Perovskite for Ultrahigh‐Speed Color/Spectrum‐Sensitive Photodetectors via Electron‐Donor Control

2020 ◽  
Vol 32 (14) ◽  
pp. 1908108 ◽  
Author(s):  
Haoxuan Sun ◽  
Wei Tian ◽  
Xianfu Wang ◽  
Kaimo Deng ◽  
Jie Xiong ◽  
...  
Keyword(s):  
Electron Donor ◽  
Donor Control ◽  
Color Spectrum

scholarly journals Potential forMethanosarcinato contribute to uranium reduction during acetate-promoted groundwater bioremediation

2017 ◽  
Author(s):  
Dawn E Holmes ◽  
Roberto Orelana ◽  
Ludovic Giloteaux ◽  
Li-Ying Wang ◽  
Pravin Shrestha ◽  
...  
Keyword(s):  
Field Experiment ◽  
Electron Donor ◽  
Enrichment Culture ◽  
Cell Suspensions ◽  
Contaminated Groundwater ◽  
Subunit A ◽  
Sedimentary Environments

AbstractPrevious studies ofin situbioremediation of uranium-contaminated groundwater with acetate injections have focused on the role ofGeobacterspecies in U(VI) reduction because of a lack of other abundant known U(VI)-reducing microorganisms. Monitoring the levels of methyl CoM reductase subunit A (mcrA) transcripts during an acetate-injection field experiment demonstrated that acetoclastic methanogens from the genusMethanosarcinawere enriched after 40 days of acetate amendment. The increased abundance ofMethanosarcinacorresponded with an accumulation of methane in the groundwater. An enrichment culture dominated by aMethanosarcinaspecies with the sameMethanosarcina mcrAsequence that predominated in the field experiment could effectively convert acetate to methane. In order to determine whetherMethanosarcinaspecies could be participating in U(VI) reduction in the subsurface, cell suspensions ofM. barkeriwere incubated in the presence of U(VI) with acetate provided as the electron donor. U(VI) was reduced by metabolically activeM. barkericells, however, no U(VI) reduction was observed in inactive controls. These results demonstrate thatMethanosarcinaspecies could play an important role in the long-term bioremediation of uranium-contaminated aquifers after depletion of Fe(III) oxides limits the growth ofGeobacterspecies. The results also suggest thatMethanosarcinahave the potential to influence uranium geochemistry in a diversity of anaerobic sedimentary environments.

Polyhydroxyalkanoate (PHB) as a slow-release electron donor for advanced in situ bioremediation of chlorinated solvent-contaminated aquifers

2014 ◽  
Vol 31 (4) ◽  
pp. 377-382 ◽  
Author(s):  
Massimiliano Baric ◽  
Lucia Pierro ◽  
Biancamaria Pietrangeli ◽  
Marco Petrangeli Papini
Keyword(s):  
Electron Donor ◽  
Slow Release ◽  
In Situ Bioremediation ◽  
Chlorinated Solvent ◽  
Contaminated Aquifers

scholarly journals Dissimilatory Arsenate Reduction with Sulfide as Electron Donor: Experiments with Mono Lake Water and Isolation of Strain MLMS-1, a Chemoautotrophic Arsenate Respirer

2004 ◽  
Vol 70 (5) ◽  
pp. 2741-2747 ◽  
Author(s):  
Shelley E. Hoeft ◽  
Thomas R. Kulp ◽  
John F. Stolz ◽  
James T. Hollibaugh ◽  
Ronald S. Oremland
Keyword(s):  
Electron Donor ◽  
Lake Water ◽  
Electron Donors ◽  
Mono Lake ◽  
Arsenate Reduction ◽  
Curved Rod ◽  
Gene Probing ◽  
Rrna Sequences ◽  
16S Rrna Sequences

ABSTRACT Anoxic bottom water from Mono Lake, California, can biologically reduce added arsenate without any addition of electron donors. Of the possible in situ inorganic electron donors present, only sulfide was sufficiently abundant to drive this reaction. We tested the ability of sulfide to serve as an electron donor for arsenate reduction in experiments with lake water. Reduction of arsenate to arsenite occurred simultaneously with the removal of sulfide. No loss of sulfide occurred in controls without arsenate or in sterilized samples containing both arsenate and sulfide. The rate of arsenate reduction in lake water was dependent on the amount of available arsenate. We enriched for a bacterium that could achieve growth with sulfide and arsenate in a defined, mineral medium and purified it by serial dilution. The isolate, strain MLMS-1, is a gram-negative, motile curved rod that grows by oxidizing sulfide to sulfate while reducing arsenate to arsenite. Chemoautotrophy was confirmed by the incorporation of H14CO3 − into dark-incubated cells, but preliminary gene probing tests with primers for ribulose-1,5-biphosphate carboxylase/oxygenase did not yield PCR-amplified products. Alignment of 16S rRNA sequences indicated that strain MLMS-1 was in the δ-Proteobacteria, located near sulfate reducers like Desulfobulbus sp. (88 to 90% similarity) but more closely related (97%) to unidentified sequences amplified previously from Mono Lake. However, strain MLMS-1 does not grow with sulfate as its electron acceptor.

An in situ electron donor consumption strategy for photoelectrochemical biosensing of proteins based on ternary Bi2S3/Ag2S/TiO2 NT arrays

2018 ◽  
Vol 54 (7) ◽  
pp. 806-809 ◽  
Author(s):  
Bing Wang ◽  
Jun-Tao Cao ◽  
Yu-Xiang Dong ◽  
Fu-Rao Liu ◽  
Xiao-Long Fu ◽  
...  
Keyword(s):  
Ascorbic Acid ◽  
Electron Donor ◽  
Acid Oxidase ◽  
Ascorbic Acid Oxidase ◽  
First Time

An ascorbic acid oxidase–ascorbic acid bioevent-based electron donor consumption mode is introduced into the PEC bioassay for the first time.

In Situ Destruction of Perchlorate and Nitrate Using Gaseous Electron Donor Injection Technology

2011 ◽  
Vol 31 (4) ◽  
pp. 103-112 ◽  
Author(s):  
Patrick J. Evans ◽  
Rodney A. Fricke ◽  
Karl Hopfensperger ◽  
Tom Titus
Keyword(s):  
Electron Donor ◽  
Gaseous Electron ◽  
Injection Technology

Electron-Donor-Acceptor Complexing Reagents for the Analysis of Pesticides. I. Survey of Reagents and Instrumental Techniques

1971 ◽  
Vol 54 (5) ◽  
pp. 1100-1109
Author(s):  
O Hutzinger ◽  
W D Jamieson ◽  
J D Macneil ◽  
R W Frei
Keyword(s):  
Thin Layer ◽  
Electron Donor ◽  
Complexing Agent ◽  
Sample Tube ◽  
Π Complex ◽  
Different Temperatures ◽  
Donor Acceptor ◽  
High Degree ◽  
Layer Chromatography

Abstract The formation of electron-donor-acceptor complexes for the detection of pesticides and their metabolites in conjunction with thin layer chromatography is discussed. The method is nondestructive, as the π-complex formation is reversible. Thus, the pesticide (or metabolite) may be recovered after separation from the complexing agent. The complexes studied may be transferred into a mass spectrometer sample tube and individual spectra of the pesticide and complexing agent may be obtained at different temperatures. The complexes are generally highly colored and this is an additional aid in distinguishing between closely related pesticides and metabolites. The absorption spectra of the chromatographed species on thin layer plates may be determined by in situ reflectance spectroscopy. The techniques discussed lack the sensitivity of methods such as esterase inhibition or fluorescence, but provide a high degree of selectivity for samples which may be separated at the microgram level or higher. The method of complexation and the instrumental techniques discussed could be useful to researchers involved in metabolic or structural studies.

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