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Journal articles on the topic 'Anoxic environments'

Author: Grafiati

Published: 4 June 2021

Last updated: 9 February 2022

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1

Rogov, MA, EV Shchepetova, and VA Zakharov. "Late Jurassic – earliest Cretaceous prolonged shelf dysoxic–anoxic event and its possible causes." Geological Magazine 157, no. 10 (2020): 1622–42. http://dx.doi.org/10.1017/s001675682000076x.

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AbstractThe Late Jurassic – earliest Cretaceous time interval was characterized by a widespread distribution of dysoxiс–anoxiс environments in temperate- and high-latitude epicontinental seas, which could be defined as a shelf dysoxic–anoxic event (SDAE). In contrast to black shales related to oceanic anoxic events, deposits generated by the SDAE were especially common in shelf sites in the Northern Hemisphere. The onset and termination of the SDAE was strongly diachronous across different regions. The SDAE was not associated with significant disturbances of the carbon cycle. Deposition of org

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Child, R. E. "Anoxic Environments in Archive Conservation." Journal of the Society of Archivists 23, no. 2 (2002): 171–78. http://dx.doi.org/10.1080/0037981022000006354.

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Nardelli, M. P., C. Barras, E. Metzger, et al. "Experimental evidence for foraminiferal calcification under anoxia." Biogeosciences 11, no. 14 (2014): 4029–38. http://dx.doi.org/10.5194/bg-11-4029-2014.

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Abstract. Benthic foraminiferal tests are widely used for paleoceanographic reconstructions from a range of different environments with varying dissolved oxygen concentrations in the bottom water. There is ample evidence that foraminifera can live in anoxic sediments. For some species, this is explained by a switch to facultative anaerobic metabolism (i.e. denitrification). Here we show for the first time that adult specimens of three benthic foraminiferal species are not only able to survive, but are also able to calcify under anoxic conditions, at various depths in the sediment, and with or

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Nardelli, M. P., C. Barras, E. Metzger, et al. "Experimental evidence for foraminiferal calcification under anoxia." Biogeosciences Discussions 11, no. 3 (2014): 4669–94. http://dx.doi.org/10.5194/bgd-11-4669-2014.

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Abstract. Benthic foraminiferal tests are widely used for paleoceanographic reconstructions. There is ample evidence that foraminifera can live in anoxic sediments. For some species, this is explained by a switch to facultative anaerobic metabolism (i.e. denitrification). Here we show for the first time that adult specimens of three benthic foraminiferal species are not only able to survive but are also able to calcify in anoxic conditions, at various depths in the sediment, with and without nitrates. This demonstrates ongoing metabolic processes, even in micro-environments where denitrificati

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Orsi, William D., Raphaël Morard, Aurele Vuillemin, et al. "Anaerobic metabolism of Foraminifera thriving below the seafloor." ISME Journal 14, no. 10 (2020): 2580–94. http://dx.doi.org/10.1038/s41396-020-0708-1.

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Abstract Foraminifera are single-celled eukaryotes (protists) of large ecological importance, as well as environmental and paleoenvironmental indicators and biostratigraphic tools. In addition, they are capable of surviving in anoxic marine environments where they represent a major component of the benthic community. However, the cellular adaptations of Foraminifera to the anoxic environment remain poorly constrained. We sampled an oxic-anoxic transition zone in marine sediments from the Namibian shelf, where the genera Bolivina and Stainforthia dominated the Foraminifera community, and use me

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Kartal, Boran, Hans J. C. T. Wessels, Erwin van der Biezen, et al. "Effects of Nitrogen Dioxide and Anoxia on Global Gene and Protein Expression in Long-Term Continuous Cultures of Nitrosomonas eutropha C91." Applied and Environmental Microbiology 78, no. 14 (2012): 4788–94. http://dx.doi.org/10.1128/aem.00668-12.

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ABSTRACTNitrosomonas eutrophais an ammonia-oxidizing betaproteobacterium found in environments with high ammonium levels, such as wastewater treatment plants. The effects of NO2on gene and protein expression under oxic and anoxic conditions were determined by maintainingN. eutrophastrain C91 in a chemostat fed with ammonium under oxic, oxic-plus-NO2, and anoxic-plus-NO2culture conditions. Cells remained viable but ceased growing under anoxia; hence, the chemostat was switched from continuous to batch cultivation to retain biomass. After several weeks under each condition, biomass was harvested

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Meilijson, Aaron, Sarit Ashckenazi-Polivoda, Peter Illner, et al. "Evidence for specific adaptations of fossil benthic foraminifera to anoxic–dysoxic environments." Paleobiology 42, no. 1 (2015): 77–97. http://dx.doi.org/10.1017/pab.2015.31.

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AbstractIt has generally been argued that the majority of fossil benthic foraminifera, the most common proxy for paleo bottom oceanic conditions, could not tolerate anoxia. Here we present evidence that fossil foraminifera were able to successfully colonize anoxic–dysoxic bottom waters, by using adaptations similar to those found in living species. Our study is based on a multi proxy micropaleontological and geochemical investigation of the Upper Cretaceous sediments from the Levant upwelling regime. A shift from buliminid to diverse trochospiral dominated assemblages was recorded in an interv

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Senior, Nicholas A., Taylor Martino, and Nikitas Diomidis. "The anoxic corrosion behaviour of carbon steel in anoxic alkaline environments simulating a Swiss L/ILW repository environment." Materials and Corrosion 72, no. 1-2 (2020): 131–40. http://dx.doi.org/10.1002/maco.202011780.

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9

de Beer, Dirk, Andreas Schramm, Cecilia M. Santegoeds, and Helle K. Nielsen. "Anaerobic processes in activated sludge." Water Science and Technology 37, no. 4-5 (1998): 605–8. http://dx.doi.org/10.2166/wst.1998.0726.

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We found anoxic zones in aerated activated sludge flocs, and demonstrated denitrification under normal operating conditions. Sulfate reduction was not found. Micro-environments and microbial conversions in flocs from bulking and non-bulking activated sludge were determined with microsensors for H2S, O2, NO2− and NO3−. Denitrification and sulfate reduction rates were mmeasured with 15N- and 35S-tracer techniques. We showed that under normal reactor conditions (ca. 20% air saturation) anoxic zones develop within flocs allowing denitrification. The denitrification rates amounted to 40% of the rat

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10

Rausch, Richard N., Larry I. Crawshaw, and Helen L. Wallace. "Effects of hypoxia, anoxia, and endogenous ethanol on thermoregulation in goldfish, Carassius auratus." American Journal of Physiology-Regulatory, Integrative and Comparative Physiology 278, no. 3 (2000): R545—R555. http://dx.doi.org/10.1152/ajpregu.2000.278.3.r545.

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Effects of hypoxia, anoxia, and endogenous ethanol (EtOH) on selected temperature (Tsel) and activity in goldfish were evaluated. Blood and brain EtOH concentrations ([EtOH]) and brain oxygen partial pressure ([Formula: see text]) were quantified at crucial ambient oxygen pressures. Below a threshold value near 31 Torr, Tsel decreased as a function of environmental[Formula: see text]. Tsel of 15°C-acclimated fish was ∼10°C at the onset of anoxia and changed little over 2 h. Activity showed a similar response pattern. Brain [EtOH] was significantly elevated above control levels after 1 h anoxia

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11

Keppler, Frank, Mihály Boros, Christian Frankenberg, et al. "Methane formation in aerobic environments." Environmental Chemistry 6, no. 6 (2009): 459. http://dx.doi.org/10.1071/en09137.

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Environmental context. Methane is an important greenhouse gas and its atmospheric concentration has drastically increased since pre-industrial times. Until recently biological methane formation has been associated exclusively with anoxic environments and microbial activity. In this article we discuss several alternative formation pathways of methane in aerobic environments and suggest that non-microbial methane formation may be ubiquitous in terrestrial and marine ecosystems. Abstract. Methane (CH4), the second principal anthropogenic greenhouse gas after CO2, is the most abundant reduced orga

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Porter, Susannah M., Heda Agić, and Leigh Anne Riedman. "Anoxic ecosystems and early eukaryotes." Emerging Topics in Life Sciences 2, no. 2 (2018): 299–309. http://dx.doi.org/10.1042/etls20170162.

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Through much of the Proterozoic Eon (2.5–0.54 billion years ago, Ga), oceans were dominantly anoxic. It is often assumed that this put a brake on early eukaryote diversification because eukaryotes lived only in oxygenated habitats, which were restricted to surface waters and benthic environments near cyanobacterial mats. Studies of extant microbial eukaryotes show, however, that they are diverse and abundant in anoxic (including sulfidic) environments, often through partnerships with endo- and ectosymbiotic bacteria and archaea. Though the last common ancestor of extant eukaryotes was capable

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Boesen, C., and D. Postma. "Pyrite formation in anoxic environments of the Baltic." American Journal of Science 288, no. 6 (1988): 575–603. http://dx.doi.org/10.2475/ajs.288.6.575.

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Kazumi, J., M. E. Caldwell, J. M. Suflita, D. R. Lovley, and L. Y. Young. "Anaerobic Degradation of Benzene in Diverse Anoxic Environments." Environmental Science & Technology 31, no. 3 (1997): 813–18. http://dx.doi.org/10.1021/es960506a.

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15

Dawson, S. C., and N. R. Pace. "Novel kingdom-level eukaryotic diversity in anoxic environments." Proceedings of the National Academy of Sciences 99, no. 12 (2002): 8324–29. http://dx.doi.org/10.1073/pnas.062169599.

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Zhou, Zhichao, Jie Pan, Fengping Wang, Ji-Dong Gu, and Meng Li. "Bathyarchaeota: globally distributed metabolic generalists in anoxic environments." FEMS Microbiology Reviews 42, no. 5 (2018): 639–55. http://dx.doi.org/10.1093/femsre/fuy023.

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17

Donard, Olivier F. X., and James H. Weber. "Volatilization of tin as stannane in anoxic environments." Nature 332, no. 6162 (1988): 339–41. http://dx.doi.org/10.1038/332339a0.

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18

Cockell, C. S., P. Schwendner, A. Perras, et al. "Anaerobic microorganisms in astrobiological analogue environments: from field site to culture collection." International Journal of Astrobiology 17, no. 4 (2017): 314–28. http://dx.doi.org/10.1017/s1473550417000246.

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AbstractAstrobiology seeks to understand the limits of life and to determine the physiology of organisms in order to better assess the habitability of other worlds. To successfully achieve these goals we require microorganisms from environments on Earth that approximate to extraterrestrial environments in terms of physical and/or chemical conditions. The most challenging of these environments with respect to sample collection, isolation and cultivation of microorganisms are anoxic environments. In this paper, an approach to this challenge was implemented within the European Union's MASE (Mars

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Barone, Varrella, Tangherlini, et al. "Marine Fungi: Biotechnological Perspectives from Deep-Hypersaline Anoxic Basins." Diversity 11, no. 7 (2019): 113. http://dx.doi.org/10.3390/d11070113.

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Deep-sea hypersaline anoxic basins (DHABs) are one of the most hostile environments on Earth. Even though DHABs have hypersaline conditions, anoxia and high hydrostatic pressure, they host incredible microbial biodiversity. Among eukaryotes inhabiting these systems, recent studies demonstrated that fungi are a quantitatively relevant component. Here, fungi can benefit from the accumulation of large amounts of organic material. Marine fungi are also known to produce bioactive molecules. In particular, halophilic and halotolerant fungi are a reservoir of enzymes and secondary metabolites with va

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Zhang, Shuichang, Xiaomei Wang, Huajian Wang, et al. "The oxic degradation of sedimentary organic matter 1400 Ma constrains atmospheric oxygen levels." Biogeosciences 14, no. 8 (2017): 2133–49. http://dx.doi.org/10.5194/bg-14-2133-2017.

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Abstract. We studied sediments from the ca. 1400 million-year-old Xiamaling Formation from the North China block. The upper unit of this formation (unit 1) deposited mostly below storm wave base and contains alternating black and green-gray shales with very distinct geochemical characteristics. The black shales are enriched in redox-sensitive trace metals, have high concentrations of total organic carbon (TOC), high hydrogen index (HI) and iron speciation indicating deposition under anoxic conditions. In contrast, the green-gray shales show no trace metal enrichments, have low TOC, low HI and

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SCHINK, B., T. J. PHELPS, B. EICHLER, and J. G. ZEIKUS. "Comparison of Ethanol Degradation Pathways in Anoxic Freshwater Environments." Microbiology 131, no. 3 (1985): 651–60. http://dx.doi.org/10.1099/00221287-131-3-651.

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Straub, Kristina L., Marcus Benz, and Bernhard Schink. "Iron metabolism in anoxic environments at near neutral pH." FEMS Microbiology Ecology 34, no. 3 (2001): 181–86. http://dx.doi.org/10.1111/j.1574-6941.2001.tb00768.x.

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23

Esteban, Genoveva F., Bland J. Finlay, and Ken J. Clarke. "Sequestered organelles sustain aerobic microbial life in anoxic environments." Environmental Microbiology 11, no. 2 (2009): 544–50. http://dx.doi.org/10.1111/j.1462-2920.2008.01797.x.

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O'Shea, K. J., M. C. Miles, P. Fritz, S. K. Frape, and D. E. Lawson. "Oxygen-18 and carbon-13 in the carbonates of the Salina formation of southwestern Ontario." Canadian Journal of Earth Sciences 25, no. 2 (1988): 182–94. http://dx.doi.org/10.1139/e88-021.

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The oxygen and carbon isotopic composition of the carbonates of the Upper Silurian Salina formation of the Michigan Basin was investigated to aid in interpretation of depositional environments.13C results indicate that a change from generally anoxic bottom conditions to oxic conditions occurred during deposition of the B evaporite unit. The organic-rich A carbonate units were deposited in a shallow-water, evaporitic setting, most likely adjacent to a sabkha-type environment. A positive water balance maintained the anoxic conditions and buffered the carbon isotopes.Above the B evaporite, the is

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Bastviken, David, and Lars Tranvik. "The Leucine Incorporation Method Estimates Bacterial Growth Equally Well in Both Oxic and Anoxic Lake Waters." Applied and Environmental Microbiology 67, no. 7 (2001): 2916–21. http://dx.doi.org/10.1128/aem.67.7.2916-2921.2001.

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ABSTRACT Bacterial biomass production is often estimated from incorporation of radioactively labeled leucine into protein, in both oxic and anoxic waters and sediments. However, the validity of the method in anoxic environments has so far not been tested. We compared the leucine incorporation of bacterial assemblages growing in oxic and anoxic waters from three lakes differing in nutrient and humic contents. The method was modified to avoid O2 contamination by performing the incubation in syringes. Isotope saturation levels in oxic and anoxic waters were determined, and leucine incorporation r

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Butler, Sara, James Pope, Subba Chaganti, Daniel Heath, and Christopher Weisener. "Biogeochemical Characterization of Metal Behavior from Novel Mussel Shell Bioreactor Sludge Residues." Geosciences 9, no. 1 (2019): 50. http://dx.doi.org/10.3390/geosciences9010050.

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Acid mine drainage (AMD) remediation commonly produces byproducts which must be stored or utilized to reduce the risk of further contamination. A mussel shell bioreactor has been implemented at a coal mine in New Zealand, which is an effective remediation option, although an accumulated sludge layer decreased efficiency which was then removed and requires storage. To understand associated risks related to storage or use of the AMD sludge material, a laboratory mesocosm study investigated the physio-chemical and biological influence in two conditions: anoxic storage (burial deep within a waste

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Garcia, Elena, Julio Torres, Nuria Rebolledo, Raul Arrabal, and Javier Sanchez. "Corrosion of Steel Rebars in Anoxic Environments. Part I: Electrochemical Measurements." Materials 14, no. 10 (2021): 2491. http://dx.doi.org/10.3390/ma14102491.

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The number of reinforced concrete structures subject to anoxic conditions such as offshore platforms and geological storage facilities is growing steadily. This study explored the behaviour of embedded steel reinforcement corrosion under anoxic conditions in the presence of different chloride concentrations. Corrosion rate values were obtained by three electrochemical techniques: Linear polarization resistance, electrochemical impedance spectroscopy, and chronopotenciometry. The corrosion rate ceiling observed was 0.98 µA/cm2, irrespective of the chloride content in the concrete. By means of a

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Lomans, B. P., A. Pol, and H. J. M. Op den Camp. "Microbial cycling of volatile organic sulfur compounds in anoxic environments." Water Science and Technology 45, no. 10 (2002): 55–60. http://dx.doi.org/10.2166/wst.2002.0288.

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Microbial cycling of volatile organic sulfur compounds (VOSC) is investigated due to the impact these compounds are thought to have on environmental processes like global temperature control, acid precipitation and the global sulfur cycle. Moreover, in several kinds of industries like composting plants and the paper industry VOSC are released causing odor problems. Waste streams containing these compounds must be treated in order to avoid the release of these compounds to the atmosphere. This paper describes the general mechanisms for the production and degradation of methanethiol (MT) and dim

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Lovley, Derek R. "Anaerobes into heavy metal: Dissimilatory metal reduction in anoxic environments." Trends in Ecology & Evolution 8, no. 6 (1993): 213–17. http://dx.doi.org/10.1016/0169-5347(93)90102-u.

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Sorial, George A., Spyridon P. Papadimas, Makram T. Suidan, and Thomas F. Speth. "Competitive adsorption of vocs and bom-oxic and anoxic environments." Water Research 28, no. 9 (1994): 1907–19. http://dx.doi.org/10.1016/0043-1354(94)90166-x.

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Çinar, Ö., T. Deniz, and C. P. L. Grady. "Effect of oxygen on the stability and inducibility of the biodegradative capability of benzoate." Water Science and Technology 48, no. 8 (2003): 247–54. http://dx.doi.org/10.2166/wst.2003.0475.

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Anoxic zones in biological nitrogen removal systems are typically open to the atmosphere and receive oxygen from the atmosphere and the recirculation flow from the aerobic zone. This raises the question of how such oxygen input might influence the stability and inducibility of the enzyme systems involved in biodegradation of aromatic compounds. To investigate this, various amounts of oxygen were added to mixed culture denitrifying chemostats receiving benzoate at 667 mg/h as chemical oxygen demand (COD), and the stability and inducibility of the culture’s benzoate biodegradative capability (BB

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Lueders, Tillmann, Bianca Pommerenke, and Michael W. Friedrich. "Stable-Isotope Probing of Microorganisms Thriving at Thermodynamic Limits: Syntrophic Propionate Oxidation in Flooded Soil." Applied and Environmental Microbiology 70, no. 10 (2004): 5778–86. http://dx.doi.org/10.1128/aem.70.10.5778-5786.2004.

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ABSTRACT Propionate is an important intermediate of the degradation of organic matter in many anoxic environments. In methanogenic environments, due to thermodynamic constraints, the oxidation of propionate requires syntrophic cooperation of propionate-fermenting proton-reducing bacteria and H2-consuming methanogens. We have identified here microorganisms that were active in syntrophic propionate oxidation in anoxic paddy soil by rRNA-based stable-isotope probing (SIP). After 7 weeks of incubation with [13C]propionate (<10 mM) and the oxidation of ∼30 μmol of 13C-labeled substrate per g dry

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Slotznick, Sarah P., Nicholas L. Swanson-Hysell, and Erik A. Sperling. "Oxygenated Mesoproterozoic lake revealed through magnetic mineralogy." Proceedings of the National Academy of Sciences 115, no. 51 (2018): 12938–43. http://dx.doi.org/10.1073/pnas.1813493115.

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Terrestrial environments have been suggested as an oxic haven for eukaryotic life and diversification during portions of the Proterozoic Eon when the ocean was dominantly anoxic. However, iron speciation and Fe/Al data from the ca. 1.1-billion-year-old Nonesuch Formation, deposited in a large lake and bearing a diverse assemblage of early eukaryotes, are interpreted to indicate persistently anoxic conditions. To shed light on these distinct hypotheses, we analyzed two drill cores spanning the transgression into the lake and its subsequent shallowing. While the proportion of highly reactive to

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Kelsey, Rick G., Gladwin Joseph, and Michael G. McWilliams. "Ethanol synthesis by anoxic root segments from five cedar species relates to their habitat attributes but not their known differences in vulnerability to Phytophthora lateralis root disease." Canadian Journal of Forest Research 41, no. 6 (2011): 1202–11. http://dx.doi.org/10.1139/x11-043.

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Ethanol synthesis by anoxic root segments from Port Orford cedar (Chamaecyparis lawsoniana (A. Murray bis) Parl.); yellow cedar (Chamaecyparis nootkatensis (D. Don) Spach); Atlantic white cedar (Chamaecyparis thyoides (L.) Britton, Sterns & Poggenb.); western redcedar (Thuja plicata Donn ex D. Don), and incense cedar (Calocedrus decurrens (Torr.) Florin ) was compared to determine whether the amounts that they produced during flooding could contribute the known greater vulnerability of Port Orford cedar to infection by Phytophthora lateralis Tucker & Milbrat. Roots were incubated in wa

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Meyer, Rikke Louise, Lars Hauer Larsen, and Niels Peter Revsbech. "Microscale Biosensor for Measurement of Volatile Fatty Acids in Anoxic Environments." Applied and Environmental Microbiology 68, no. 3 (2002): 1204–10. http://dx.doi.org/10.1128/aem.68.3.1204-1210.2002.

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ABSTRACT A microscale biosensor for acetate, propionate, isobutyrate, and lactate is described. The sensor is based on the bacterial respiration of low-molecular-weight, negatively charged species with a concomitant reduction of NO3 − to N2O. A culture of denitrifying bacteria deficient in N2O reductase was immobilized in front of the tip of an electrochemical N2O microsensor. The bacteria were separated from the outside environment by an ion-permeable membrane and supplied with nutrients (except for electron donors) from a medium reservoir behind the N2O sensor. The signal of the sensor, whic

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Klüpfel, Laura, Annette Piepenbrock, Andreas Kappler, and Michael Sander. "Humic substances as fully regenerable electron acceptors in recurrently anoxic environments." Nature Geoscience 7, no. 3 (2014): 195–200. http://dx.doi.org/10.1038/ngeo2084.

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Gu, B., Y. Bian, C. L. Miller, W. Dong, X. Jiang, and L. Liang. "Mercury reduction and complexation by natural organic matter in anoxic environments." Proceedings of the National Academy of Sciences 108, no. 4 (2011): 1479–83. http://dx.doi.org/10.1073/pnas.1008747108.

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Bains, William, Janusz Jurand Petkowski, Clara Sousa-Silva, and Sara Seager. "Trivalent Phosphorus and Phosphines as Components of Biochemistry in Anoxic Environments." Astrobiology 19, no. 7 (2019): 885–902. http://dx.doi.org/10.1089/ast.2018.1958.

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Dolfing, Jan, Bo Jiang, Anne M. Henstra, Alfons J. M. Stams, and Caroline M. Plugge. "Syntrophic Growth on Formate: a New Microbial Niche in Anoxic Environments." Applied and Environmental Microbiology 74, no. 19 (2008): 6126–31. http://dx.doi.org/10.1128/aem.01428-08.

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ABSTRACT Anaerobic syntrophic associations of fermentative bacteria and methanogenic archaea operate at the thermodynamic limits of life. The interspecies transfer of electrons from formate or hydrogen as a substrate for the methanogens is key. Contrary requirements of syntrophs and methanogens for growth-sustaining product and substrate concentrations keep the formate and hydrogen concentrations low and within a narrow range. Since formate is a direct substrate for methanogens, a niche for microorganisms that grow by the conversion of formate to hydrogen plus bicarbonate—or vice versa—may see

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Behnke, Anke, John Bunge, Kathryn Barger, Hans-Werner Breiner, Victoria Alla, and Thorsten Stoeck. "Microeukaryote Community Patterns along an O2/H2S Gradient in a Supersulfidic Anoxic Fjord (Framvaren, Norway)." Applied and Environmental Microbiology 72, no. 5 (2006): 3626–36. http://dx.doi.org/10.1128/aem.72.5.3626-3636.2006.

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ABSTRACT To resolve the fine-scale architecture of anoxic protistan communities, we conducted a cultivation-independent 18S rRNA survey in the superanoxic Framvaren Fjord in Norway. We generated three clone libraries along the steep O2/H2S gradient, using the multiple-primer approach. Of 1,100 clones analyzed, 753 proved to be high-quality protistan target sequences. These sequences were grouped into 92 phylotypes, which displayed high protistan diversity in the fjord (17 major eukaryotic phyla). Only a few were closely related to known taxa. Several sequences were dissimilar to all previously

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Cui, Tao, Yang Quan Jiao, and Xiao Mei Wang. "Analysis on Sedimentary Environment of Bauxite in Wuchuan-Zheng’an-Daozhen Area, Northern Guizhou." Advanced Materials Research 616-618 (December 2012): 1409–15. http://dx.doi.org/10.4028/www.scientific.net/amr.616-618.1409.

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The sedimentary environment of bauxite in Wuchuan-Zheng’an-Daozhen Area has been debated for a long time. Through research on the element B, the sedimentary characteristics of bauxite, the distribution of four different natural types of bauxite and reference paleogeographic data we concluded that bauxite in Wuchuan-Zheng’an-Daozhen Area was a typical sedimentary deposit, with a provenance mainly from south-west. Bauxite was formed in an anoxic bay, which was partly closed and open to north. The sedimentary environment shifted between lacustrine and bay environments, accompanying frequent trans

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Blocho, Reilly M., Richard W. Smith, and Mark R. Noll. "Analyses of depositional environments of the Marcellus formation in New York using biomarker and trace metal proxies." Journal of Petroleum Exploration and Production Technology 11, no. 8 (2021): 3163–75. http://dx.doi.org/10.1007/s13202-021-01237-8.

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AbstractThe purpose of this study was to observe how the composition of organic matter (OM) and the extent of anoxia during deposition within the Marcellus Formation in New York varied by distance from the sediment source in eastern New York. Lipid biomarkers (n-alkanes and fatty acids) in the extractable organic component (bitumen) of the shale samples were analyzed, and proxies such as the average chain length (ACL), aquatic to terrestrial ratio (ATR) and carbon preference index (CPI) of n-alkanes were calculated. Fatty acids were relatively non-abundant due to the age of the shale bed, but

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Enning, Dennis, and Julia Garrelfs. "Corrosion of Iron by Sulfate-Reducing Bacteria: New Views of an Old Problem." Applied and Environmental Microbiology 80, no. 4 (2013): 1226–36. http://dx.doi.org/10.1128/aem.02848-13.

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ABSTRACTAbout a century ago, researchers first recognized a connection between the activity of environmental microorganisms and cases of anaerobic iron corrosion. Since then, such microbially influenced corrosion (MIC) has gained prominence and its technical and economic implications are now widely recognized. Under anoxic conditions (e.g., in oil and gas pipelines), sulfate-reducing bacteria (SRB) are commonly considered the main culprits of MIC. This perception largely stems from three recurrent observations. First, anoxic sulfate-rich environments (e.g., anoxic seawater) are particularly co

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Porter, Abigail W., Sarah J. Wolfson, Max Häggblom, and Lily Y. Young. "Microbial transformation of widely used pharmaceutical and personal care product compounds." F1000Research 9 (February 21, 2020): 130. http://dx.doi.org/10.12688/f1000research.21827.1.

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Pharmaceutical and personal care products (PPCPs) are commonly used chemicals that are increasingly detected in urban-impacted environments, particularly those receiving treated wastewater. PPCPs may have toxicological effects on the macrofauna that are exposed through contaminated water; thus, there is interest in microbially mediated transformations that may degrade PPCPs. This review discusses specific examples of PPCP transformations that may occur in anoxic environments, including O-methylation and O-demethylation.

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Cook, Colin A., Kathryn C. Hahn, Justin B. F. Morrissette-McAlmon, and Warren L. Grayson. "Oxygen delivery from hyperbarically loaded microtanks extends cell viability in anoxic environments." Biomaterials 52 (June 2015): 376–84. http://dx.doi.org/10.1016/j.biomaterials.2015.02.036.

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Ding, Chang, and Jianzhong He. "Molecular techniques in the biotechnological fight against halogenated compounds in anoxic environments." Microbial Biotechnology 5, no. 3 (2011): 347–67. http://dx.doi.org/10.1111/j.1751-7915.2011.00313.x.

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Zheng, Wang, Liyuan Liang, and Baohua Gu. "Mercury Reduction and Oxidation by Reduced Natural Organic Matter in Anoxic Environments." Environmental Science & Technology 46, no. 1 (2011): 292–99. http://dx.doi.org/10.1021/es203402p.

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Kříbek, B. "Metallogeny, structural, lithological and time controls of ore deposition in anoxic environments." Mineralium Deposita 26, no. 2 (1991): 122–31. http://dx.doi.org/10.1007/bf00195259.

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Picard, Aude, Amy Gartman, Julie Cosmidis, et al. "Authigenic metastable iron sulfide minerals preserve microbial organic carbon in anoxic environments." Chemical Geology 530 (December 2019): 119343. http://dx.doi.org/10.1016/j.chemgeo.2019.119343.

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Schink, B. "Microbially Driven Redox Reactions in Anoxic Environments: Pathways, Energetics, and Biochemical Consequences." Engineering in Life Sciences 6, no. 3 (2006): 228–33. http://dx.doi.org/10.1002/elsc.200620130.

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