Results 11 to 20 of about 1,025,390 (347)

Fast Directional Changes during Geomagnetic Transitions: Global Reversals or Local Fluctuations?

open access: yesGeosciences, 2021
Paleomagnetic investigations from sediments in Central and Southern Italy found directional changes of the order of 10∘ per year during the last geomagnetic field reversal (which took place about 780,000 years ago).
Stefano Maffei   +4 more
doaj   +1 more source

An unbroken network of interactions connecting flagellin domains is required for motility in viscous environments.

open access: yesPLoS Pathogens, 2023
In its simplest form, bacterial flagellar filaments are composed of flagellin proteins with just two helical inner domains, which together comprise the filament core.
Marko Nedeljković   +8 more
doaj   +1 more source

Microscopic Vortex Velocity in the Inner Crust and Outer Core of Neutron Stars [PDF]

open access: yes, 2016
Treatment of the vortex motion in the superfluids of the inner crust and the outer core of neutron stars is a key ingredient in modeling a number of pulsar phenomena, including glitches and magnetic field evolution.
Alpar, M. Ali, Gügercinoğlu, Erbil
core   +2 more sources

The separation of the geomagnetic field originated in the core, in the asthenosphere, and in the crust

open access: yesAnnals of Geophysics, 1999
The separation of the field produced by different internal sources can be accomplished by means of the so-called spatial spectrum of the geomagnetic field of internal origin.
X. Q. Gao   +3 more
doaj   +1 more source

Unveiling the outer core composition with neutrino oscillation tomography

open access: yesFrontiers in Earth Science, 2023
In the last 70 years, geophysics has established that the Earth’s outer core is an FeNi alloy containing a few percent of light elements, whose nature and amount remain controversial. Besides the classical combinations of silicon and oxygen, hydrogen has
Lukas Maderer   +6 more
doaj   +1 more source

Effects of LPS Composition in Escherichia coli on Antibacterial Activity and Bacterial Uptake of Antisense Peptide-PNA Conjugates

open access: yesFrontiers in Microbiology, 2022
The physical and chemical properties of the outer membrane of Gram-negative bacteria including Escherichia coli have a significant impact on the antibacterial activity and uptake of antibiotics, including antimicrobial peptides and antisense peptide ...
Lise Goltermann   +6 more
doaj   +1 more source

A glassy lowermost outer core [PDF]

open access: yesGeophysical Journal International, 2009
SUMMARY New theories for the viscosity of metallic melts at core pressures and temperatures, together with observations of translational modes of oscillation of Earth’s solid inner core, suggest a rapid increase in the dynamic viscosity near the bottom of the liquid outer core.
openaire   +1 more source

Geomagnetic Dipole Changes and Upwelling/Downwelling at the Top of the Earth's Core

open access: yesFrontiers in Earth Science, 2018
The convective state of the top of Earth's outer core is still under debate. Conflicting evidence from seismology and geomagnetism provides arguments for and against a thick stably stratified layer below the core-mantle boundary.
Ludovic Huguet   +3 more
doaj   +1 more source

The Aeromonas salmonicida lipopolysaccharide core from different subspecies: the unusual subsp. pectinolytica

open access: yesFrontiers in Microbiology, 2016
Initial hydridization tests using A. salmonicida typical and atypical strains showed the possibility of different LPS outer cores among these strains.
Juan M Tomas, Susana eMerino
doaj   +1 more source

The Oligosaccharide Region of LPS Governs Predation of E. coli by the Bacterivorous Protist, Acanthamoeba castellanii

open access: yesMicrobiology Spectrum, 2023
Protozoan predation is a major cause of bacterial mortality. The first step of predation for phagocytic amoebae is the recognition of their prey. Lipopolysaccharide (LPS) is a major component of Gram-negative bacteria and is only present on the outer ...
Ying Liu, Gerald B. Koudelka
doaj   +1 more source

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