Results 121 to 130 of about 344,061 (314)

The redshift and X-ray photon index evolutionary LX-LUV relations of quasars

Astronomy & Astrophysics
The LX-LUV relation serves as a cornerstone for extending the Hubble diagram to higher redshift by utilizing quasars as standard candles. However, the constancy of the LX-LUV relation has been embroiled in controversy recently.
Li Ge-Xing, Li Zhi-Hong, Song Na, Chen Chen, Dong Chao, Tian Jun-Wen, Zhang Zhi-Cheng, Li Jia-Ying-Hao, Tian Hui-Ling, Ma Mei-Yue-Nan   +9 more
doaj   +1 more source

Coronal line emission from NLS1s

New Astronomy Reviews, 2000
We discuss the optical coronal line spectra observed for a sample of 19 Narrow-Line Seyfert 1 galaxies. We find no correlation between the coronal line strength and the soft X-ray power-law index derived from ROSAT PSPC data. There is a trend for broader coronal lines to have larger equivalent widths.
O'Brien, P. T., Bleackley, P.
openaire   +2 more sources

Importin 7 mediates the nuclear import of HIV‐1 integrase via a specific interacting interface

FEBS Open Bio, EarlyView.
HIV‐1 integrase enables viral DNA integration into the host genome. By binding to the core domain of the host protein Importin 7 via its C‐terminal domain, the integrase is transported across the nuclear membrane into the nucleus, where integration of the viral genome into host DNA takes place. This translocation is a critical step for subsequent viral
Juana Bana, Avigail Yariv, Tal Oppenheim, Hadar Amartely, Dana Reichmann, Oded Livnah   +5 more
wiley   +1 more source

UV Line Emissions Of 44i Bootis [PDF]

Journal of Astronomy and Space Sciences, 1998
We obtained UV light curves of 44i Bootis, a W UMa type star from the IUE low dispersion spectra. In order to investigate variations of the emission lines from chromospheric activity and transition region, UV line intensity has been measured for CI, CII,
Dongjoo Han, Yonggi Kim, Wonyong Han, Woo-Baik Lee   +3 more
doaj  

New Constraints on Quasar Broad Absorption and Emission Line Regions from Gravitational Microlensing

Frontiers in Astronomy and Space Sciences, 2017
Gravitational microlensing is a powerful tool allowing one to probe the structure of quasars on sub-parsec scale. We report recent results, focusing on the broad absorption and emission line regions.
Damien Hutsemékers, Lorraine Braibant, Dominique Sluse, Timo Anguita, René Goosmann   +4 more
doaj   +1 more source

Structural studies and functional engineering of NanX: an anhydro‐sialic acid transporter from Escherichia coli

FEBS Open Bio, EarlyView.
Biophysical characterisation shows that NanX, a membrane transport protein from the major facilitator superfamily (MFS), forms both monomers and dimers after purification. AlphaFold modelling and substrate docking provide information on residues likely involved in substrate recognition for NanX and another MFS member, NanT.
Michael C. Newton‐Vesty, Kelsi R. Hall, Zachary D. Tillett, Liam S. Turk, James S. Davies, Michael J. Currie, Hamish G. Brown, Sepideh Valimehr, Peter D. Mace, Andrew E. Whitten, Santosh Panjikar, Eric Hanssen, Rachel A. North, Renwick C.J. Dobson   +13 more
wiley   +1 more source

The radio structure of 3C 316, a galaxy with double-peaked narrow optical emission lines [PDF]

, 2013
The galaxy 3C 316 is the brightest in the radio band among the optically selected candidates exhibiting double-peaked narrow optical emission lines. Observations with the Very Large Array, Multi-Element Remotely Linked Interferometer Network (e-MERLIN ...
Frey, S., Xiao, T., Y.-H. Xu, S. Komossa, T. An, W.A. Baan, Paragi, Z., Frey, Sándor, S. Frey, Xu, Y. -H., Z. Paragi, Baan, W. A., T. Xiao, An, T., Hong, X. -Y., Komossa, S., Gabanyi, K. E., X.-Y. Hong, Gabányi, Krisztina Éva, K.´E. Gab´anyi   +19 more
core   +1 more source

Far-infrared Emission Lines as Metallicity Diagnostic

The Astrophysical Journal
The chemical abundance of the interstellar medium is a key tracer of galaxy evolution. Optical and ultraviolet emission lines are widely used to derive gas-phase metallicities, but suffer from uncertainties due to possible temperature fluctuations and ...
Elizabeth Fletcher, Tommy Wiklind, Skarleth Motiño Flores, Rafael T. Eufrasio   +3 more
doaj   +1 more source

Clinical Validation of Plasma p‐217tau in Neurological Diseases

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Objective Plasma p‐217tau is a minimally invasive but specific biomarker for diagnosing Alzheimer's disease (AD). However, its disease specificity remains to be clinically evaluated. We validated the reliability of the p‐217tau biomarker in 12 other neurological diseases.
Takeshi Kawarabayashi, Takumi Nakamura, Ryoma Takahashi, Tetsuya Ueda, Seiji Kinoshita, Chikage Uchida, Takashi Sugawara, Kentaro Hashimoto, Kunihiko Ishizawa, Masakuni Amari, Hiroo Kasahara, Yoshio Ikeda, Masamitsu Takatama, Mikio Shoji   +13 more
wiley   +1 more source

Design and development of micro-electromechanical acoustic emission sensors [PDF]

, 2012
Non-Destructive Testing (NDT) is a vital technique in modern engi- neering, enabling the monitoring of the structural health of a com- ponent and therefore enabling the prediction of component failure.
Pickwell, A. J.
core