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  • Gold Flotation Production Line

    Gold Flotation Production Line

    Flotation is widely used in gold Processing. In China, 80% rock gold is Processed by flotation. Flotation…

    Manganese Ore Magnetic Separation Production Line

    Manganese Ore Magnetic Separation Production Line

    Manganese ore belongs to the weak magnetic minerals, which can be recovered by high-intensity magnetic…

    Graphite Ore Beneficiation Process

    Graphite Ore Beneficiation Process

    Xinhai usually applying multi-stage grinding process to protect graphite flake from damaged. Applying…

    Gold Cil Processing Line

    Gold Cil Processing Line

    Gold CIL (Carbon in Leach) Process is an efficient design of extracting and recovering gold from its…

    Cu Pb Zn Dressing Process

    Cu Pb Zn Dressing Process

    Adopting mixed flotation-concentrate regrinding Process can reduce the grinding cost, and be easy to…

    Dolomite Mining Process

    Dolomite Mining Process

    Dolomite mining process is the solution of separating dolomite concentrate from Dolomite raw ore. Based…

    ferrous iron oxidation by anoxygenic phototrophic bacteria

  • Iron Oxidizers Home Statistics

    Oxidation of ferrous iron occurs anaerobically with nitrate (pH 7) Photoferrotrophy anoxygenic phototrophic bacteria . Authors for literature search Konhauseretal Hiesing et al 1998 1999 . Leptothrix is a well know genus that oxidizes FeII (These are not photosynthetic. Many of the other Fe oxidzers are photosynthetic.) They produce sheaths and are motile by way of flagella. Cells are

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  • Phototrophic oxidation of ferrous minerals SpringerLink

    Widdel F Schnell S Heising S Ehrenreich A Assmus B Schink B (1993) Ferrous iron oxidation by anoxygenic phototrophic bacteria. Nature 362 834835. Nature

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  • Photoferrotrophy SpringerLink

    Kappler A Pasquero C Konhauser KO Newman DK (2005) Deposition of banded iron formations by anoxygenic phototrophic Fe(II) oxidizing bacteria. Geology 33:865868 CrossRef ADS Google Scholar Laufer K Nordhoff M Schmidt C Behrens S Jørgensen BB Kappler A (2016) Co existence of microaerophilic nitrate reducing and phototrophic Fe(II) oxidizers and Fe(III) reducers in coastal

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  • Photoferrotrophs thrive in an Archean Ocean analogue PNAS

    14/10/2008· Considerable discussion surrounds the potential role of anoxygenic phototrophic Fe(II) oxidizing bacteria in both the genesis of Banded Iron Formations (BIFs) and early marine productivity. However anoxygenic phototrophs have yet to be identified in modern environments with comparable chemistry and physical structure to the ancient Fe(II) rich (ferruginous) oceans from which BIFs

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  • Anaerobic oxidation of ferrous iron by purple bacteria a

    Abstract. Anoxic iron rich sediment samples that had been stored in the light showed development of brown rusty patches. Subcultures in defined mineral media with ferrous iron (10 mmol/liter mostly precipitated as FeCO3) yielded enrichments of anoxygenic phototrophic bacteria which used ferrous iron as the sole electron donor for photosynthesis.

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  • Phototrophic oxidation of ferrous iron by a Rhodomicrobium

    that ferrous iron oxidation by strain BS 1 is only a side activity of this bacterium that cannot support growth exclusively with this electron source over prolonged periods of time. Keywords iron metabolism phototrophic bacteria Rhodomicrobium vannielii iron complexation nitrilotriacetate (NTA) INTRODUCTION

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  • The iron oxidizing proteobacteria Microbiology Society

    The iron bacteria are a collection of morphologically and phylogenetically heterogeneous prokaryotes. They include some of the first micro organisms to be observed and described and continue to be the subject of a considerable body of fundamental and applied microbiological research. While species of iron oxidizing bacteria can be found in many different phyla most are affiliated with

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  • Deposition of banded iron formations by anoxygenic

    idation of ferrous iron to ferric iron are known pho tochemical oxidation by ultraviolet light (Cairns Smith 1978; Fran cois 1986) and light dependent enzymatic Fe(II) oxidation by anoxygenic phototrophic bacteria (Widdel et al. 1993) the most an cient type of photosynthetic organisms (Xiong et al. 2000). Although

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  • Anaerobic oxidation of ferrous iron by purple bacteria a

    Abstract. Anoxic iron rich sediment samples that had been stored in the light showed development of brown rusty patches. Subcultures in defined mineral media with ferrous iron (10 mmol/liter mostly precipitated as FeCO3) yielded enrichments of anoxygenic phototrophic bacteria which used ferrous iron as the sole electron donor for photosynthesis.

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  • Anaerobic Oxidation of Ferrous Iron byPurple Bacteria a

    chemical oxidation of dissolved ferrous iron in ocean water with free oxygen from early oxygenic phototrophs such as cyanobacteria (4). Alternatively however an experimentally proven UVlight driven reaction of ferrous iron with water yielding ferric iron and H2has beenproposed to explain BIF deposition (7 9 18 35). Furthermore there have

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  • Fe(II) Oxidation Is an Innate Capability of Nitrate

    Phylogenetically diverse species of bacteria can catalyze the oxidation of ferrous iron coupled to nitrate (NO3) reduction often referred to as nitrate dependent iron oxidation (NDFO). Very little is known about the biochemistry of NDFO and though growth benefits have been observed mineral encrustations and nitrite accumulation likely limit growth.

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  • Physiology of phototrophic iron(II) oxidizing bacteria

    The Fe(II) oxidation rates determined for phototrophic iron oxidizing bacteria under varying conditions of pH temperature and light and will help to understand the interactions of iron oxidizers and iron reducers. Fe(II) oxidizing bacteria provide the Fe(III) for the iron reducers that mineralize organic matter and in turn the iron reducers provide the Fe(II) that is used by the anoxygenic

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  • Oxidation of Ferrous(II) Iron by Phototrophic Bacteria and

    that microbial oxidation of ferrous iron by anoxygenic phototrophic bacteria may be occurring within the OATZ. Therefore enrichments for ferrous(ll) iron oxidizing phototrophs were constructed with the goal of culturing microorganisms capable of this process. Media was also designed to select for phototrophs capable of oxidizing the

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  • Microbial Iron(II) Oxidation in Littoral Freshwater Lake

    (1994). Anaerobic oxidation of ferrous iron by purple bacteria a new type of phototrophic metabolism. (2006). Anaerobic redox cycling of iron by freshwater sediment microorganisms. (1996). Anaerobic nitrate dependent microbial oxidation of ferrous iron. (2003). Autumn physical limnological experimental campaign in the Island Mainau littoral

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  • Anaerobic oxidation of ferrous iron by purple bacteria a

    Abstract. Anoxic iron rich sediment samples that had been stored in the light showed development of brown rusty patches. Subcultures in defined mineral media with ferrous iron (10 mmol/liter mostly precipitated as FeCO3) yielded enrichments of anoxygenic phototrophic bacteria which used ferrous iron as the sole electron donor for photosynthesis.

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  • Frontiers Phototrophic Fe(II) oxidation in the

    Here we show that anoxygenic phototrophic bacteria contribute to Fe(II) oxidation in the water column of the ferruginous sulfate poor meromictic lake La Cruz (Spain). We observed in situ photoferrotrophic activity through stimulation of phototrophic carbon uptake in the presence of Fe(II) and determined light dependent Fe(II) oxidation by the

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  • Rhodovulurn iodosurn sp. nov. and Rhodovulum robiginosurn

    International Journal of Systematic Bacteriology (1 999) 49 729 735 Printed in Great Britain Rhodovulurn iodosurn sp. nov. and Rhodovulum robiginosurn sp. nov. two new marine phototrophic

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  • Ferrous iron oxidation by denitrifying bacteria in

    3.3 Ferrous iron oxidation by denitrifying bacteria. The denitrifying enrichment cultures obtained from the serial dilutions of sediment from the different layers of cores 9601 9602 and 9706 were tested for their ability to catalyze iron oxidation.

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  • Ferrous iron oxidation by anoxygenic phototrophic bacteria

    29/04/1993· NATURAL oxidation of ferrous to ferric iron by bacteria such as Thiobacillus ferrooxidans or Gallionella ferruginea1 or by chemical oxidation2 3 has previously been thought always to involve

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  • Ferrous iron oxidation by denitrifying bacteria in

    4.1 Ferrous iron oxidation by denitrifying bacteria. The average population densities of denitrifying bacteria in the different cores were between 2.610 6 and 1.510 8 cells ml 1; the values are in the same range as those reported for other sediments . The significantly higher number of organotrophic denitrifiers in the upper sediment

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  • Deposition of banded iron formations by anoxygenic

    idation of ferrous iron to ferric iron are known pho tochemical oxidation by ultraviolet light (Cairns Smith 1978; Fran cois 1986) and light dependent enzymatic Fe(II) oxidation by anoxygenic phototrophic bacteria (Widdel et al. 1993) the most an cient type of photosynthetic organisms (Xiong et al. 2000). Although

    Live Chat
  • Anaerobic oxidation of ferrous iron by purple bacteria a

    1/12/1994· Anoxic iron rich sediment samples that had been stored in the light showed development of brown rusty patches. Subcultures in defined mineral media with ferrous iron (10 mmol/liter mostly precipitated as FeCO3) yielded enrichments of anoxygenic phototrophic bacteria which used ferrous iron as the sole electron donor for photosynthesis. Two different types of purple bacteria

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  • Electron uptake by iron oxidizing phototrophic bacteria

    Notably the pioABC operon which encodes a protein system essential for photoautotrophic growth by ferrous iron oxidation influences electron uptake. These data reveal a previously unknown

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  • Ferrous iron oxidation by anoxygenic phototrophic bacteria

    Natural oxidation of ferrous to ferric iron by bacteria such as Thiobacillus ferrooxidans or Gallionella ferruginea 1 or by chemical oxidation2 3 has previously been thought always to involve molecular oxygen as the electron acceptor.

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  • Phototrophic Fe(II) oxidation in the chemocline of a

    the precipitation of iron oxides resulting from the abiotic reaction of ferrous iron (Fe(II)) with photosynthetically produced oxygen. Earliest traces of oxygen date from 2.7Ga thus raising questions as to what may have caused BIF precipitation before oxygenic photosynthesis evolved. The discovery of anoxygenic phototrophic bacteria thriving

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  • Fe(II) Oxidation Is an Innate Capability of Nitrate

    Phylogenetically diverse species of bacteria can catalyze the oxidation of ferrous iron coupled to nitrate (NO 3 ) reduction often referred to as nitrate dependent iron oxidation (NDFO).Very little is known about the biochemistry of NDFO and though growth benefits have been observed mineral encrustations and nitrite accumulation likely limit growth.

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  • Chlorobium ferrooxidans microbewiki

    The finding of Chlorobium ferrooxidans and the observation of ferrous iron oxidation by a green anoxygenic phototrophic bacteria may fuel further speculations on the question of how banded iron formations originated. Green phototrophs represent a separate group within the Bacteria domain this may be an indication that phototrophic ferrous iron

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  • Iron metabolism in anoxic environments at near neutral pH

    Iron oxidizing phototrophic bacteria were isolated from freshwater and marine sediments and were affiliated to different genera of purple or green phototrophic bacteria . Ferrous iron oxidation by anoxygenic phototrophic bacteria is plausible in terms of energetics. The redox potential of the redox pair ferric/ferrous iron in

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  • Deposition of Banded Iron Formations by photoautotrophic

    The mechanism of banded iron formation (BIF) deposition is controversial but classically has been interpreted to reflect ferrous iron oxidation by molecular oxygen after cyanobacteria

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  • Anaerobic Oxidation of Ferrous Iron byPurple Bacteria a

    chemical oxidation of dissolved ferrous iron in ocean water with free oxygen from early oxygenic phototrophs such as cyanobacteria (4). Alternatively however an experimentally proven UVlight driven reaction of ferrous iron with water yielding ferric iron and H2has beenproposed to explain BIF deposition (7 9 18 35). Furthermore there have

    Live Chat
  • Anaerobic oxidation of ferrous iron by purple bacteria a

    Anoxic iron rich sediment samples that had been stored in the light showed development of brown rusty patches. Subcultures in defined mineral media with ferrous iron (10 mmol/liter mostly precipitated as FeCO3) yielded enrichments of anoxygenic phototrophic bacteria which used ferrous iron as the sole electron donor for photosynthesis.

    Live Chat
  • Iron oxidizing bacteria

    Anoxygenic Phototrophic Ferrous Iron Oxidation . The anoxygenic phototrophic iron oxidation was the first anaerobic metabolism to be described within the iron anaerobic oxidation metabolism the photoferrotrophic bacteria use Fe2+ as electron donor and the energy from the light to assimilate CO 2 into Biomass through the Calvin Benson Bassam

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  • Ferrous iron oxidation by anoxygenic phototrophic bacteria

    Abstract NATURAL oxidation of ferrous to ferric iron by bacteria such as Thiobacillus ferrooxidans or Gallionella ferruginea 1 or by chemical oxidation 2 3 has previously been thought always to involve molecular oxygen as the electron acceptor. Anoxic photochemical reactions 4 6 or a photobiological process involving two photosystems 7 9 have also been discussed as mechanisms of ferrous iron

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  • Photoferrotrophy deposition of banded iron formations

    Banded iron formation (BIF) deposition was the likely result of oxidation of ferrous iron in seawater by either oxygenic photosynthesis or iron dependent anoxygenic photosynthesisphotoferrotrophy. BIF deposition however remains enigmatic because the photosynthetic biomass produced during iron oxidation is conspicuously absent from BIFs. We have addressed this enigma through experiments

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  • Deposition of banded iron formations by anoxygenic

    The mechanism of banded iron formation (BIF) deposition is controversial but classically has been interpreted to reflect ferrous iron oxidation by molecular oxygen after cyanobacteria evolved on Earth. Anoxygenic photoautotrophic bacteria can also catalyze Fe(II) oxidation under anoxic conditions. Calculations based on experimentally

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  • Sulfur Metabolism in Phototrophic Sulfur Bacteria

    This review focuses on the dissimilatory and assimilatory metabolism of inorganic sulfur compounds in these bacteria and also briefly discusses these metabolisms in other types of anoxygenic phototrophic bacteria. The biochemistry and genetics of sulfur compound oxidation in PSB and GSB are described in

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  • Deposition of banded iron formations by anoxygenic

    The mechanism of banded iron formation (BIF) deposition is controversial but classically has been interpreted to reflect ferrous iron oxidation by molecular oxygen after cyanobacteria evolved on Earth. Anoxygenic photoautotrophic bacteria can also catalyze Fe(II) oxidation under anoxic conditions. Calculations based on experimentally determined Fe(II) oxidation rates by these

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  • Anoxygenic photosynthesis

    Bacterial anoxygenic photosynthesis is distinguished from the more familiar terrestrial plant oxygenic photosynthesis by the nature of the terminal reductant (e.g. hydrogen sulfide rather than water) and in the byproduct generated (e.g. elemental sulfur instead of molecular oxygen). As its name implies anoxygenic photosynthesis does not produce oxygen as a byproduct of the reaction.

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  • Phototrophic Fe(II) oxidation in the chemocline of a

    From this ferruginous water accepted that anoxygenic phototrophic bacteria evolved before column alternating sedimentary deposits of iron oxide minerals oxygen producing cyanobacteria (Xiong et al. 2000; Raymond and silica precipitated between 3.8 and 1.8 Ga ago (Anbar and et al. 2003). The isolation of phototrophic Fe(II) oxidizing bac

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