Results 131 to 140 of about 2,588,999 (242)

Vitamin B12 Auxotrophy in Isolates from the Deep Subsurface of the Iberian Pyrite Belt. [PDF]

open access: yesGenes (Basel), 2023
Mateos G   +3 more
europepmc   +1 more source

Molecular basis for inhibition of methane clathrate growth by a deep subsurface bacterial protein. [PDF]

open access: yesPNAS Nexus, 2023
Huard DJE   +9 more
europepmc   +1 more source

Structural and Chemical Dynamics of Cu/NiO/Cu(100) Surfaces During CO2 Hydrogenation

open access: yesAngewandte Chemie International Edition, EarlyView.
Dynamic segregation as a design principle for Cu–Ni catalysts. Operando LEEM/XPEEM tracks reduction, reshaping, and surface segregation processes taking place in Cu‐encapsulated NiO islands supported on Cu(100) during CO2 hydrogenation. ABSTRACT Understanding the dynamic restructuring of bimetallic catalysts under reaction conditions is key to ...
Mauricio J. Prieto   +9 more
wiley   +1 more source

Design and Test of High Temperature Deep-Water Subsurface Safety Valve

open access: yesShiyou jixie, 2019
The integrated injection and production technology in offshore oil fields requires that the downhole safety valve has a temperature resistance of 350℃ and a working depth of not less than 1 330 m.
Jiang Zhaoping   +4 more
doaj  

Computer modeling and experimental work on the astrobiological implications of the martian subsurface ionising radiation environment [PDF]

open access: yes, 2008
Any microbial life extant in the top meters of the martian subsurface is likely to be held dormant for long periods of time by the current permafrost conditions.
Dartnell, Lewis R, Dartnell, L.R.
core  

An unusual titanosaur axis from the Upper Cretaceous of Brazil and its significance for sauropod anatomy and systematics

open access: yesThe Anatomical Record, EarlyView.
Abstract The Upper Cretaceous São José do Rio Preto Formation (Bauru Group, southeastern Brazil) has yielded a fragmentary but taxonomically diverse record of titanosaur sauropods, although elements from cervical series remain scarce. Here, we describe a nearly complete sauropod axis from the Vila Ventura Paleontological Area, representing an uncommon ...
Bruno A. Navarro   +7 more
wiley   +1 more source

Leveraging Big Multitemporal Multisource Satellite Data and Artificial Intelligence for the Detection of Complex and Invisible Features: The Case of Extensive Irrigation Mapping

open access: yesArchaeological Prospection, EarlyView.
ABSTRACT The detection of buried or obscured archaeological features remains a central challenge in landscape archaeology, particularly in the irrigated floodplains of Mesopotamia where levees and canals formed the basis of complex agrarian systems. This study presents a deep learning–based approach for the large‐scale, automated detection of ancient ...
Nazarij Buławka   +4 more
wiley   +1 more source

Coupled C, H, N, S and Fe biogeochemical cycles operating in the continental deep subsurface of the Iberian Pyrite Belt. [PDF]

open access: yesEnviron Microbiol, 2023
Amils R   +20 more
europepmc   +1 more source

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