Results 41 to 50 of about 52,993 (223)

Biotechnological aspects of sulfate reduction with methane as electron donor [PDF]

open access: yes, 2010
Biological sulfate reduction can be used for the removal and recovery of oxidized sulfur compounds and metals from waste streams. However, the costs of conventional electron donors, like hydrogen and ethanol, limit the application possibilities.
Lens, P.N.L.   +2 more
core   +2 more sources

Tracking Microbial Evolution in the Subseafloor Biosphere

open access: yesmSystems, 2021
The deep marine subsurface constitutes a massive biosphere that hosts a multitude of archaea, bacteria, and viruses across a diversity of habitats. These microbes play key roles in mediating global biogeochemical cycles, and the marine subsurface is ...
Rika E. Anderson
doaj   +1 more source

Short-term variability in the sedimentary BIT index of Lake Challa, East Africa over the past 2200 years : validating the precipitation proxy [PDF]

open access: yes, 2015
. The branched vs. isoprenoid index of tetraethers (BIT index) in Lake Challa sediments has been applied as a monsoon precipitation proxy on the assumption that the primary source of branched tetraether lipids (brGDGTs) was soil washed in from the lake's
Buckles, LK   +4 more
core   +1 more source

Different carboxyl-rich alicyclic molecules proxy compounds select distinct bacterioplankton for oxidation of dissolved organic matter in the mesopelagic Sargasso Sea [PDF]

open access: yes, 2020
© The Author(s), 2020. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Liu, S., Parsons, R., Opalk, K., Baetge, N., Giovannoni, S., Bolanos, L. M., Kujawinski, E.
Baetge, Nicholas   +10 more
core   +1 more source

Ammonia-oxidizing archaea have similar power requirements in diverse marine oxic sediments [PDF]

open access: yesThe ISME Journal, 2021
Abstract Energy/power availability is regarded as one of the ultimate controlling factors of microbial abundance in the deep biosphere, where fewer cells are found in habitats of lower energy availability. A critical assumption driving the proportional relationship between total cell abundance and power availability is that the cell ...
Rui Zhao   +5 more
openaire   +4 more sources

Diffuse flow environments within basalt- and sediment-based hydrothermal vent ecosystems harbor specialized microbial communities [PDF]

open access: yes, 2013
Hydrothermal vents differ both in surface input and subsurface geochemistry. The effects of these differences on their microbial communities are not clear.
Campbell, Barbara J.   +6 more
core   +3 more sources

Similar Microbial Communities Found on Two Distant Seafloor Basalts. [PDF]

open access: yes, 2015
The oceanic crust forms two thirds of the Earth's surface and hosts a large phylogenetic and functional diversity of microorganisms. While advances have been made in the sedimentary realm, our understanding of the igneous rock portion as a microbial ...
Chong, Lauren S   +3 more
core   +3 more sources

Picoheterotroph (Bacteria and Archaea) biomass distribution in the global ocean [PDF]

open access: yes, 2012
We compiled a database of 39 766 data points consisting of flow cytometric and microscopical measurements of picoheterotroph abundance, including both Bacteria and Archaea.
Buitenhuis, E. T.   +5 more
core   +4 more sources

Influence of soil properties on archaeal diversity and distribution in the McMurdo Dry Valleys, Antarctica [PDF]

open access: yes, 2014
Archaea are the least understood members of the microbial community in Antarctic mineral soils. Although their occurrence in Antarctic coastal soils has been previously documented, little is known about their distribution in soils across the McMurdo Dry ...
Barrett, John E.   +5 more
core   +2 more sources

Marine ammonia-oxidising archaea and bacteria occupy distinct iron and copper niches [PDF]

open access: yesISME Communications, 2021
Abstract Ammonia oxidation by archaea and bacteria (AOA and AOB), is the first step of nitrification in the oceans. As AOA have an ammonium affinity 200-fold higher than AOB isolates, the chemical niche allowing AOB to persist in the oligotrophic ocean remains unclear.
Shafiee, RT   +4 more
openaire   +3 more sources

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