Results 311 to 320 of about 196,917 (331)
Advanced Healthcare Materials, EarlyView.A 3D‐printed PCL scaffold coated with Arginine was laminated with electrospun polyvinyl alcohol (PVA) nanofibers containing cationic cellulose nanocrystals (PVA@cCNC). This created nanoisland‐like regions of aligned and random cCNC‐rich fibers. The composite scaffold, under fluid shear stimulation, modulated macrophage polarization from M1 to M2 ...
Keya Ganguly +8 more
wiley +1 more source
Advanced Healthcare Materials, EarlyView.Tannic acid‐selenocystamine (TA‐SeCA) nanocoating enables stable, sustained catalytic nitric oxide (NO) release on catheter surfaces. This one‐step phenol‐amine coating improves catheter functionality by enhancing endogenous NO production, supporting vascular function, and reducing inflammation.
Qingqing Fan +7 more
wiley +1 more source
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Annals of the New York Academy of Sciences, 1993
The distribution of γ‐ray bursts as observed by BATSE rules out the galactic disk origin, and it is consistent with the cosmological origin. Much work is currently done to reconcile galactic halo distribution with the absence of dipole and quadrupole moments in the positions of BATSE bursts. A relativistic expansion of the source is implied by both the
A. W. Wolfendale, P. V. Ramana Murthy
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The distribution of γ‐ray bursts as observed by BATSE rules out the galactic disk origin, and it is consistent with the cosmological origin. Much work is currently done to reconcile galactic halo distribution with the absence of dipole and quadrupole moments in the positions of BATSE bursts. A relativistic expansion of the source is implied by both the
A. W. Wolfendale, P. V. Ramana Murthy
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Space Science Reviews, 1977 γ-ray astronomy is the study of the most energetic photons originating in our Galaxy and beyond, and therefore, provides the most direct means of studying the largest transfers of energy occurring in astrophysical processes. The first certain detection of celestialγ-rays came from a satellite experiment flown on OSO-III (Kraushaaret al., 1972); more ...
Carl Fichtel +3 more
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Gamma-ray bursts and gamma-ray blazars
AIP Conference Proceedings, 1994We propose that cosmological gamma‐ray bursts are produced when modestly sized black holes tidally disrupt stars, energizing relativistically outflowing jets and producing bursts for favorably oriented observers. The crucial test of this model is the detection of soft x‐ray flares with durations of ∼102 s and fluences ∼10−10−10−6 ergs cm−2 at rates of ...
Charles D. Dermer, Reinhard Schlickeiser
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2019
Gamma-ray polarimetry can provide a powerful diagnostic of the high-energy physics at work in the most extreme sources of the universe: active galactic nuclei, gamma-ray bursts, black hole binaries, pulsars, etc. The linear polarisation information of gamma-ray sources is measured using Compton scattering up to a few MeV and the conversion of high ...
Tatischeff, Vincent +2 more
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Gamma-ray polarimetry can provide a powerful diagnostic of the high-energy physics at work in the most extreme sources of the universe: active galactic nuclei, gamma-ray bursts, black hole binaries, pulsars, etc. The linear polarisation information of gamma-ray sources is measured using Compton scattering up to a few MeV and the conversion of high ...
Tatischeff, Vincent +2 more
openaire +3 more sources
Gamma-ray Astrophysics with AGILE
AIP Conference Proceedings, 2006AGILE will explore the gamma‐ray Universe with a very innovative instrument combining for the first time a gamma‐ray imager and a hard X‐ray imager. AGILE will be operational in spring 2007 and it will provide crucial data for the study of Active Galactic Nuclei, Gamma‐Ray Bursts, unidentified gamma‐ray sources.
F. LONGO +53 more
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AIP Conference Proceedings, 1983
The time histories, size spectrum, spatial distribution, and repetition rates of gamma ray bursts are reviewed briefly. Evidence for a neutron star origin for gamma ray bursts may be found in many of these aspects of bursters. New results from optical searches are described.
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The time histories, size spectrum, spatial distribution, and repetition rates of gamma ray bursts are reviewed briefly. Evidence for a neutron star origin for gamma ray bursts may be found in many of these aspects of bursters. New results from optical searches are described.
openaire +3 more sources
Physics Bulletin, 1978
Abstract The potential value of investigation of the γ-ray content of cosmic radiation has long been recognized, but evaluation of measurements made with high-flying balloons is difficult because of the generation of secondary γ-rays in the atmosphere above the detector.
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Abstract The potential value of investigation of the γ-ray content of cosmic radiation has long been recognized, but evaluation of measurements made with high-flying balloons is difficult because of the generation of secondary γ-rays in the atmosphere above the detector.
openaire +2 more sources