Results 21 to 30 of about 225,000 (312)

Diagnosing and mapping pulmonary emphysema on X-ray projection images [PDF]

open access: yes, 2013
To assess whether grating-based X-ray dark-field imaging can increase the sensitivity of X-ray projection images in the diagnosis of pulmonary emphysema and allow for a more accurate assessment of emphysema distribution.
Pfeiffer, Franz   +16 more
core   +1 more source

Free radical decay and micro-structure evolution of PVDF membranes in situ irradiated by synchrotron radiation X-ray

open access: yesPolymer Testing, 2022
The synchrotron radiation X-ray was used both as the irradiation source and testing tool for the PVDF membranes in-situ. The structural evolution of the PVDF membranes irradiated by the synchrotron radiation X-ray was analyzed by in-situ small angle X ...
Yang Liu   +7 more
doaj   +1 more source

X-ray scattering by intergalactic dust [PDF]

open access: yesMonthly Notices of the Royal Astronomical Society, 1985
The imaging capabilities of the Exosat and Einstein satellites at soft X-ray wavelengths have begun to show that suitable Galactic X-ray sources have extended (∼ 10 arcmin) haloes due to scattering of soft X-rays by interstellar dust. A simple argument suggests that similar haloes, due to scattering by intergalactic dust, should exist around distant (z
A. Evans, G. Norwell, M. F. Bode
openaire   +1 more source

Confocal X-ray technology based on capillary X-ray optics

open access: yesReviews in Analytical Chemistry, 2015
Capillary X-ray optics is versatile, and it can be used with synchrotron radiation source, conventional X-ray source, laser-plasma ultrafast X-ray source, and so forth.
Sun Tianxi, Ding Xunliang
doaj   +1 more source

Membrane Protein Structures in Lipid Bilayers; Small-Angle Neutron Scattering With Contrast-Matched Bicontinuous Cubic Phases

open access: yesFrontiers in Chemistry, 2021
This perspective describes advances in determining membrane protein structures in lipid bilayers using small-angle neutron scattering (SANS). Differentially labeled detergents with a homogeneous scattering length density facilitate contrast matching of ...
Charlotte E. Conn   +7 more
doaj   +1 more source

Characterization of defect structures in nanocrystalline materials by X-ray line profile analysis [PDF]

open access: yes, 2007
X-ray line profile analysis is a powerful alternative tool for determining dislocation densities, dislocation type, crystallite and subgrain size and size-distributions, and planar defects, especially the frequency of twin boundaries and stacking faults.
Tamás Ungár   +3 more
core   +1 more source

Structural intermediates in the assembly of taxoid-induced microtubules and GDP-tubulin double rings: time-resolved X-ray scattering

open access: yes, 1996
We have studied the self-association reactions of purified GDP-liganded tubulin into double rings and taxoid-induced microtubules, employing synchrotron time-resolved x-ray solution scattering.
Diaz, J.F.   +6 more
core   +1 more source

Combined scanning small-angle X-ray scattering and holography probes multiple length scales in cell nuclei

open access: yes, 2022
X‐rays are emerging as a complementary probe to visible‐light photons and electrons for imaging biological cells. By exploiting their small wavelength and high penetration depth, it is possible to image whole, intact cells and resolve subcellular ...
Cassini, Chiara   +14 more
core   +1 more source

Ultrafast X-ray Photochemistry at European XFEL: Capabilities of the Femtosecond X-ray Experiments (FXE) Instrument

open access: yesApplied Sciences, 2020
Time-resolved X-ray methods are widely used for monitoring transient intermediates over the course of photochemical reactions. Ultrafast X-ray absorption and emission spectroscopies as well as elastic X-ray scattering deliver detailed electronic and ...
Dmitry Khakhulin   +13 more
doaj   +1 more source

EDNRB‐dependent endothelin signaling reduces proliferation and promotes proneural‐to‐mesenchymal transition in gliomas

open access: yesMolecular Oncology, EarlyView.
Glioma cells mainly express the endothelin receptor EDNRB, while EDNRA is restricted to a perivascular tumor subpopulation. Endothelin signaling reduces glioma cell proliferation while promoting migration and a proneural‐to‐mesenchymal transition associated with poor prognosis. This pathway activates Ca2+, K+, ERK, and STAT3 signalings and is regulated
Donovan Pineau   +36 more
wiley   +1 more source

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