Results 81 to 90 of about 2,579,062 (253)

Assessing model-based carbon and oxygen abundance derivation from ultraviolet emission lines in AGNs

, 2023
We present an adapted version of the code HII-CHI-MISTRY-UV to derive chemical abundances from emission lines in the ultraviolet, for use in narrow line regions (NLR) of active galactic nuclei (AGN). We evaluate different ultraviolet emission line ratios
Pérez Montero, Enrique, Amorín, R., Vílchez Medina, José Manuel, Pérez-Díaz, B., García-Benito, Rubén, Pérez-Díaz, Borja, Vílchez, José M., Pérez-Montero, Enrique, Amorín, Ricardo, E Pérez-Montero, J M Vílchez, R García-Benito, R Amorín, B Pérez-Díaz   +13 more
core   +1 more source

High-Redshift SDSS Quasars With Weak Emission Lines [PDF]

, 2009
We identify a sample of 74 high-redshift quasars (z > 3) with weak emission lines from the Fifth Data Release of the Sloan Digital Sky Survey and present infrared, optical, and radio observations of a subsample of four objects at z > 4.
Young, Jason E., Carilli, C.L., Brandt, W. N., Richards, Gordon T., Kim, Jinyoung Serena, Schneider, Donald P., Shen, Yue, Gibson, Robert R., Shemmer, Ohad, Strauss, Michael A., Jiang, Linhua, Brandt, William Nielsen, Anderson, Scott F., Diamond-Stanic, Aleksandar M., Kim, J. Serena, Smith, Paul S., Carilli, Christopher L., Fan, Xiaohui, Schmidt, Gary D., Vestergaard, Marianne   +19 more
core   +2 more sources

Effect of terahertz irradiation on DNA damage repair in living cells

FEBS Open Bio, EarlyView.
We investigated the effect of terahertz (THz) wave irradiation on DNA double‐strand break (DSB) repair in living cells. We found that THz irradiation enhanced DSB repair at specific frequencies, whereas heat treatment inhibited it, indicating that this effect is nonthermal and frequency‐specific.
Yuya Ueno, Shota Yamazaki, Hiromichi Hoshina, Masahiko Harata   +3 more
wiley   +1 more source

Observation of O+ 4P-4D0 lines in proton aurora over Svalbard [PDF]

, 2004
Spectra of a proton aurora event show lines of O+ 4P-4D0 multiplet (4639–4696 Å) enhanced relative to the N2 +1N(0,2) compared to normal electron aurora. Conjugate satellite particle measurements are used as input to electron and proton transport models,
Ivchenko, N., Lanchester, B.S., Fordham, J., Galand, M., Rees, M.H., Lummerzheim, D., Furniss, I.   +6 more
core  

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

Studies of Narrow Emission Lines in AGNs [PDF]

Symposium - International Astronomical Union, 1986
Optical spectra having moderately high resolution (~ 2 — 5 Å) are being used to study the profiles of narrow emission lines in active galactic nuclei (AGNs). It is often found that forbidden lines associated with high critical densities for collisional deexcitation are the broadest. A good example is [O III] λ4363 [ne(crit) ≈ 3 × 107 cm−3], whose width
openaire   +1 more source

On the effect of emission lines on UBVR photometry [PDF]

New Astronomy, 2007
We investigate the effect on the U, B, V, Rc and Rj magnitudes of the removal of emission lines from a spectrum. We determined "Dm" corrections from the ratio of fluxes with and without emission lines, transmitted from the object through the photometric filter. An exact and a simplified approach for operative use were applied.
openaire   +2 more sources

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

General Relativity effects and line emission [PDF]

Astronomische Nachrichten, 2006
AbstractGeneral Relativity effects (gravitational redshift, light bending, …) strongly modify the characteristics of the lines emitted close to the Black Hole in Active Galactic Nuclei and Galactic Black Hole systems. These effects are reviewed and illustrated, with particular emphasis on line emission from the accretion disc.
openaire   +3 more sources

GelMA‐based 3D spheroids recapitulate transcriptomic and functional hallmarks of myeloid sarcoma

FEBS Open Bio, EarlyView.
GelMA 5% hydrogels support the formation of myeloid leukemia spheroids that recapitulate MS‐specific features, including G1 arrest, apoptosis, and ECM‐driven transcriptomic reprogramming. The 3D model mimicked soft‐tissue‐like stiffness and oxygen conditions, and transcriptomic convergence with primary MS samples confirmed its utility as a preclinical ...
Nicolas Germain, Elise Buret, Le Hoang Thanh Nguyen, Marion Cocheteux, Nicolas Touya, Mélanie Dhayer, Romain Dubois, Frank Lafont, Sebastien Janel, Patrice Maboudou, Steve Lancel, Philippe Marchetti   +11 more
wiley   +1 more source