Results 71 to 80 of about 177,892 (289)

Trends and Future Challenges in Sampling the Deep Terrestrial Biosphere

Frontiers in Microbiology, 2014
Research in the deep terrestrial biosphere is driven by interest in novel biodiversity and metabolisms, biogeochemical cycling, and the impact of human activities on this ecosystem.
Michael J Wilkins, Michael J Wilkins, Rebecca eDaly, Paula J Mouser, Ryan eTrexler, Kelly C Wrighton, Shikha eSharma, David R Cole, Jennifer F Biddle, Elizabeth eDenis, Jim K Fredrickson, Thomas L. Kieft, Tullis C Onstott, Lee ePetersen, Susan M Pfiffner, Tommy J Phelps, Matthew O Schrenk   +16 more
doaj   +1 more source

Tubular carbonate concretions as hydrocarbon migration pathways? Examples from North Island, New Zealand [PDF]

, 2006
Cold seep carbonate deposits are associated with the development on the sea floor of distinctive chemosyn¬thetic animal communities and carbonate minerali¬sation as a consequence of microbially mediated anaerobic oxidation of methane.
Browne, Gregory H., Campbell, Kathleen A., Kamp, Peter J.J., King, Peter R., Nelson, Campbell S., Nyman, Stephanie Leigh, Pearson, Michael J., Schellenberg, Francesca   +7 more
core   +1 more source

Assessing Altered Coating Adhesion on Plasma‐Deoxidized Surfaces Under Oxygen‐Free Conditions

Advanced Engineering Materials, EarlyView.
This study demonstrates the effectiveness of atmospheric pressure plasma pretreatment in modifying silicon and stainless steel surfaces to improve adhesion. Argon‐hydrogen plasma increases surface roughness and improves adhesion strength, whereas pure argon results in smoother surfaces and structural changes.
Selina Raumel, Lara Kuhr, Khemais Barienti, Sebastian Herbst, Florian Nürnberger, Hans Jürgen Maier, Marc C. Wurz   +6 more
wiley   +1 more source

Corrosion and Process Analysis of a Preoxidized MgO Recyclate‐Based Cermet Anode in Laboratory‐Scale Na‐Cryolite Molten Salt Electrolysis of Aluminum at 1000°C

Advanced Engineering Materials, EarlyView.
EDX elemental map of the pre‐oxidized MgO–steel cermet anode cross section after electrolysis. The development of inert anodes for aluminum electrolysis remains challenging due to the high corrosivity of cryolite‐based melts at 950°C–1000°C. This study investigates the corrosion and process behavior of a carbon‐free MgO–steel cermet anode derived from ...
Alexander Adamczyk, Farhan Hossain, Felipe A. Garcia Paz, Serhii Yaroshevskyi, Felix Drechsler, Daniel Vogt, Christos G. Aneziris, Alexandros Charitos   +7 more
wiley   +1 more source

Depth and Dissolved Organic Carbon Shape Microbial Communities in Surface Influenced but Not Ancient Saline Terrestrial Aquifers

Frontiers in Microbiology, 2018
The continental deep biosphere is suggested to contain a substantial fraction of the earth’s total biomass and microorganisms inhabiting this environment likely have a substantial impact on biogeochemical cycles.
Margarita Lopez-Fernandez, Mats Åström, Stefan Bertilsson, Mark Dopson   +3 more
doaj   +1 more source

Implications of a short carbon pulse on biofilm formation on mica schist in microcosms with deep crystalline bedrock groundwater

Frontiers in Microbiology, 2023
Microbial life in the deep subsurface occupies rock surfaces as attached communities and biofilms. Previously, epilithic Fennoscandian deep subsurface bacterial communities were shown to host genetic potential, especially for heterotrophy and sulfur ...
Maija Nuppunen-Puputti, Riikka Kietäväinen, Ilmo Kukkonen, Malin Bomberg   +3 more
doaj   +1 more source

Subsurface microstructural changes in a cast heat resisting alloy caused by high temperature corrosion [PDF]

, 2010
A cast HP ModNb alloy (Fe–25Cr–35Ni–1Nb, wt.%) was oxidised and carburised in CO–CO2 corresponding to aC = 0.1 and pO2 = 3 1016 atm at 1080 C. Formation of an external, chromium-rich oxide scale led to depletion of this metal in a deep alloy subsurface ...
Baxter, Becker, Belen, Bennett, Brasunas, D. Monceau, D. Oquab, D.J. Young, Ledgeff, Lobnig, Meijering, Mitchell, N. Xu, Smigelskas, Smith, Xu, Young, Young, Young   +18 more
core   +2 more sources

Additive Manufacturing of Continuous Fibre Reinforced Composites: Process, Characterisation, Modelling, and Sustainability

Advanced Engineering Materials, EarlyView.
Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley   +1 more source

Trace elements affect methanogenic activity and diversity in enrichments from subsurface coal bed produced water

Frontiers in Microbiology, 2012
Microbial methane from coal beds accounts for a significant and growing percentage of natural gas worldwide. Our knowledge of physical and geochemical factors regulating methanogenesis is still in its infancy. We hypothesized that in these closed systems,
Burcu eÜnal, Verlin Ryan Perry, Mili eSheth, Vicente eGomez-Alvarez, Kuk-Jeong eChin, Klaus eNüsslein   +5 more
doaj   +1 more source

Permeability evaluation for artificial single rock fracture according to geometric aperture variation using electrical resistivity

Journal of Rock Mechanics and Geotechnical Engineering, 2021
A convenient approach was proposed by which to evaluate and monitor the permeability of a rock fracture by verifying the quantitative correlation between the electrical resistivity and permeability at laboratory scale.
Hangbok Lee, Jong-Won Lee, Tae-Min Oh
doaj   +1 more source