Results 81 to 90 of about 9,803,268 (311)
Enhanced colour encoding of materials discrimination information for multiple view dual-energy x-ray imaging [PDF]
, 2009 This thesis reports an investigation into dual-energy X-ray discrimination techniques. These techniques are designed to provide colour-coded materials discrimination information in a sequence of perspective images exhibiting sequential parallax.
Wang, X
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The Galactic Population of Magnetars: A Simulation-based Inference Study
The Astrophysical JournalPopulation synthesis modeling of the observed dynamical and physical properties of a population is a highly effective method for constraining the underlying birth parameters and evolutionary tracks.
M. Sautron +5 more
doaj +1 more source
FEBS Open Bio, EarlyView.The presence of biotin‐binding avidin proteins in fish and their biological significance are poorly characterized. We cataloged fish avidins and demonstrate that they are widely present and evolutionarily conserved. We created avd knockout zebrafish and show that zebavidin is dispensable for development and that resistance of avd knockout embryos in ...
Anni K. Saralahti +5 more
wiley +1 more source
Photoionization of the Composite Nebula Surrounding NGC 5408 X-1: Implications for Beamed Emission
The Astrophysical JournalNGC 5408 X-1 is a well-studied ultraluminous X-ray source (ULX) and is surrounded by a photoionized nebula. Previous optical spectroscopy established strong Balmer, [O iii ], and He ii λ 4686 emission from the nebula, but the powering engine remains ...
Jing Guo +6 more
doaj +1 more source
X-ray Polarization from Magnetar Sources
GalaxiesThe launch of the IXPE telescope in late 2021 finally made polarization measurements in the 2–8keV band a reality, more than 40 years after the pioneering observations of the OSO-8 satellite.
Roberto Taverna , Roberto Turolla
doaj +1 more source
DISCRETE X-RAY SOURCES IN GALAXY CLUSTERS
Odessa Astronomical Publications, 2020 Current studies of extragalactic X-ray sources using data from orbital observatory XMM- Newton are at the front line of X-ray astronomy. Resolution capacity of the observatory instruments enable to detect separate X-ray sources in the close galaxies.
A. V. Tugay +2 more
doaj +1 more source
Comparative assessment of crystallographic and cryo‐EM models in the Protein Data Bank
FEBS Open Bio, EarlyView.Raw data obtained by X‐ray crystallography or cryo‐EM result in experimental maps, ultimately fitted by atomic models. Although the physical principles are different, the final results can be viewed, compared, and evaluated in the same way. With cryogenic electron microscopy (cryo‐EM) on track to surpass X‐ray crystallography as the preferred method ...
Alexander Wlodawer +7 more
wiley +1 more source
Monitoring the X-Ray Variability of Bright X-Ray Sources in M33
The Astrophysical JournalWe present a new five-epoch Chandra X-ray Observatory monitoring survey of the nearby spiral galaxy M33 which probes X-ray variability with time sampling between two weeks and four months.
Rebecca Kyer +10 more
doaj +1 more source
FEBS Open Bio, EarlyView.In this study, a novel esterase from the thermoacidophilic archaeon Thermoplasma acidophilum was biochemically and structurally characterized. Our results demonstrate that Ta0887 is a highly thermostable esterase that preferentially hydrolyzes p‐nitrophenyl hexanoate and possesses an α‐helical cap domain that likely contributes to its substrate ...
Alejandro Delgado‐Rey +4 more
wiley +1 more source
A search for TeV gamma ray emission from X-ray binary stars [PDF]
, 1993 This work is concerned with the detection of pulsed TeV gamma ray emission from a number of X-ray binary systems by the use of the atmospheric Cerenkov technique.
Bowden, Christopher Charles Geoffrey
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