Results 41 to 50 of about 2,588,999 (242)

N2 in deep subsurface fracture fluids of the Canadian Shield: Source and possible recycling processes

, 2021
In addition to high concentrations of CH4 and H2, abundant dissolved N2 is found in subsurface fracture fluids in Precambrian cratons around the world. These fracture fluids have hydrogeological isolation times on order of thousands to millions and even ...
Labidi, Jabrane, Li, Kan, Warr, Oliver, Li, Long, Lollar, Barbara Sherwood, Giunta, Thomas   +5 more
core   +1 more source

Identification and Removal of Contaminant Sequences From Ribosomal Gene Databases: Lessons From the Census of Deep Life

Frontiers in Microbiology, 2018
Earth’s subsurface environment is one of the largest, yet least studied, biomes on Earth, and many questions remain regarding what microorganisms are indigenous to the subsurface. Through the activity of the Census of Deep Life (CoDL) and the Deep Carbon
Cody S. Sheik, Brandi Kiel Reese, Katrina I. Twing, Jason B. Sylvan, Sharon L. Grim, Matthew O. Schrenk, Mitchell L. Sogin, Frederick S. Colwell   +7 more
doaj   +1 more source

Microbial Communities in a Serpentinizing Aquifer Are Assembled through Strong Concurrent Dispersal Limitation and Selection

mSystems, 2021
In recent years, our appreciation of the extent of habitable environments in Earth’s subsurface has greatly expanded, as has our understanding of the biodiversity contained within.
Lindsay I. Putman, Mary C. Sabuda, William J. Brazelton, Michael D. Kubo, Tori M. Hoehler, Tom M. McCollom, Dawn Cardace, Matthew O. Schrenk   +7 more
doaj   +1 more source

Microbial life in the deep terrestrial subsurface [PDF]

, 1988
The distribution and function of microorganisms is a vital issue in microbial ecology. The US Department of Energy`s Program, ``Microbiology of the Deep Subsurface,`` concentrates on establishing fundamental scientific information about organisms at ...
Garland, Tom R., Francis, A. J., Meglen, Bob, Fliermans, Carl B., Fredrickson, Jim K., Ghiorse, William C., Phelps, Tom J., Bollag, Jean-Marc, Sinclair, James L., Balkwill, David L., Dodge, C. J., Wobber, Frank J., Corey, Jack C., Bledsoe, Horace W., Madsen, Eugene L., McFadden, Kris, Jones, Ralph E., Sargent, Kenneth A., White, David C., Beeman, Ralph E., Suflita, Joseph M., Hicks, Ron J.   +21 more
core   +1 more source

Changes in the deep subsurface microbial biosphere resulting from a field-scale CO2 geosequestration experiment

Frontiers in Microbiology, 2014
Subsurface microorganisms may respond to increased CO2 levels in ways that significantly affect pore fluid chemistry. Changes in CO2 concentration or speciation may result from the injection of supercritical CO2 (scCO2) into deep aquifers.
Andre eMu, Andre eMu, Andre eMu, Chris eBoreham, Chris eBoreham, Henrietta X Leong, Henrietta X Leong, Ralf eHaese, Ralf eHaese, John W Moreau, John W Moreau   +10 more
doaj   +1 more source

Microstructure Reconstruction in Battery Electrodes Using Machine Learning Based on Low‐Voltage Focused Ion Beam–Scanning Electron Microscopy Tomography Images

Advanced Engineering Materials, EarlyView.
Low‐voltage FIB‐SEM tomography combined with a image preprocessing pipeline improves phase contrast and enables reliable machine‐learning segmentation of conductive networks in lithium‐ion battery electrodes. Structural descriptors are extracted from segmented images, done semimanually and automated, and compared.
Lisa Beran, Vincent Nebel, Dominik Perius, Kshitij Kumar, Yannis Heim, Laura Bies, Tobias Kraus   +6 more
wiley   +1 more source

Anisotropic time-dependent behaviors of shale under direct shearing and associated empirical creep models

Journal of Rock Mechanics and Geotechnical Engineering
Understanding the anisotropic creep behaviors of shale under direct shearing is a challenging issue. In this context, we conducted shear-creep and steady-creep tests on shale with five bedding orientations (i.e.
Yachen Xie, Michael Z. Hou, Hejuan Liu, Cunbao Li   +3 more
doaj   +1 more source

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

Influence of Scan Strategies in Electron Beam Powder Bed Fusion on Solidification, Microstructure, and High‐Temperature Compressive Properties of γ′‐Strengthened Inconel 738LC

Advanced Engineering Materials, EarlyView.
Experiments and thermophysical simulations were conducted to investigate the electron beam powder bed fusion electron beam (PBF‐EB/M) process for the γ′‐strengthened nickel‐based superalloy Inconel 738LC. The results demonstrate the impact of process‐induced microstructural variations on high‐temperature mechanical behavior, providing a basis for ...
Jan Niklas Petenati, Karthik Kumar Banku, Prasanth Bondi, Ivan Zhirnov, Yangyiwei Yang, Gordon Schmidt, Jürgen Christen, Georg Hasemann, Manja Krüger, Bai‐Xiang Xu, Bilal Gökce, Silja‐Katharina Rittinghaus   +11 more
wiley   +1 more source

Quantifying Stream Return Flow of Agricultural Water Using SWAT-MODFLOW-PADDY Model in Korean Paddy Fields

Agronomy
In many countries, the irrigation return flow focuses only on surface and subsurface flows. In contrast, South Korea adopts a broader approach, defining the stream return flow as encompassing both quick and delayed return flows, which include subsurface ...
Jeongho Han, Seoro Lee, Jonggun Kim
doaj   +1 more source