Results 91 to 100 of about 11,427,892 (265)

World Multidisciplinary Earth Sciences Symposium - WMESS 2019

open access: yes, 2019
LAMA Energy Group; LAMA Gas and Oil; Prague City Tourism5th World Multidisciplinary Earth Sciences Symposium, WMESS 2019 -- 9 September 2019 through 13 September 2019 -- Prague -- 155452[No abstract ...
Antova, Gergana   +3 more
core   +1 more source

Structural and biochemical analysis of a B12 superbinder

open access: yesFEBS Letters, EarlyView.
BtuG proteins are vitamin B12 scavengers in Bacteroides thetaiotaomicron, a dominant human gut bacterium. We present crystal structures of three BtuG homologs bound to cobalamin and its precursor cobinamide, revealing picomolar binding affinities, among the highest known for any natural protein.
Jose M. Martinez Felices   +3 more
wiley   +1 more source

Earth Sciences Are the Model Sciences of the Anthropocene

open access: yesPerspectives of Earth and Space Scientists
After 4.5 billion years as an evolving and dynamic planet, the Earth continues to evolve but with human‐altered dynamics. Earth scientists have special opportunities and responsibilities to accelerate our understanding of Earth's changes that are ...
Daniel D. Richter   +44 more
doaj   +1 more source

Structures of mycobacterial 3‐methylcrotonyl‐CoA carboxylase reveal carrier‐domain translocation between catalytic sites

open access: yesFEBS Letters, EarlyView.
Mycobacterial 3‐methylcrotonyl‐CoA carboxylase uses a mobile biotin‐carrying domain to shuttle a carboxyl group between two catalytic sites, enabling carboxylation of 3‐methylcrotonyl‐CoA during leucine breakdown. Cryo‐electron microscopy captures the carrier at both sites and reveals an inward loop movement that may prevent futile rebinding to the ...
Ajit Yadav   +2 more
wiley   +1 more source

From junk to function — How weak selection in eukaryotes builds new parts and drives genomic complexity

open access: yesFEBS Letters, EarlyView.
How do genomes gain new functional parts? In eukaryotes, which tend to evolve under weak selection, much of the genome is junk. Palazzo and Qiu borrow the logic of Markov chains to show how non‐functional DNA becomes functional through the appearance of intermediate states, which arise due to epistasis, buffering, and biochemical messiness, allowing ...
Alexander F. Palazzo, Yi Qiu
wiley   +1 more source

Inverse problem for stress in the earth based on geodetic data

open access: yes, 1981
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1981.MICROFICHE COPY AVAILABLE IN ARCHIVES AND LINDGREN.Includes bibliographies.by Keiichiro Ikeda.Ph ...
Ikeda, Keiichiro
core  

Application of full waveform acoustic logging data to the estimation of reservoir permeability [PDF]

open access: yes, 1984
Thesis: M.S., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 1984Bibliography: leaves 40-41.by Frédéric Mathieu.M.S.M.S.
Mathieu, Frédéric.
core  

The Shewanella oneidensis Fic enzyme SoFic targets the switch‐I region of EF‐Tu for AMPylation

open access: yesFEBS Letters, EarlyView.
Fic enzymes mediate diverse post‐translational modifications across all domains of life, including AMPylation. Prokaryotic EF‐Tu can be AMPylated and deAMPylated by the conserved Fic enzyme SoFic. Structural and biochemical approaches were used to characterize the effect of AMPylation on EF‐Tu, SoFic's enzymatic activities, and the enzyme‐target ...
Svenja Runge   +6 more
wiley   +1 more source

Earth structure and earthquake locations in the Coyote Lake area, central California

open access: yes, 1981
Thesis (Ph.D.)--Massachusetts Institute of Technology, Dept. of Earth and Planetary Sciences, 1981.MICROFICHE COPY AVAILABLE IN ARCHIVES AND LINDGREN.Bibliography: leaves 285-296.by Clifford H.
Thurber, Clifford H
core  

Validating the application of cyclic hydraulic pressure pulses to reduce breakdown pressure in granite

open access: yesiScience
Summary: As the geoenergy sector moves toward more sustainable practices, an emerging field of research is the proposed utilization of cyclic hydraulic pressure pulses to safely and efficiently enhance productivity.
Jackie Evan Kendrick   +7 more
doaj   +1 more source

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