Results 11 to 20 of about 1,181,189 (249)

The XMM large scale structure survey: optical vs. X-ray classifications of active galactic nuclei and the unified scheme [PDF]

, 2007
Our goal is to characterize AGN populations by comparing their X-ray and optical classifications. We present a sample of 99 spectroscopically identified X-ray point sources in the XMM-LSS survey which are significantly detected in the [2-10] keV band ...
A. Corral, A. Schwope, Akylas, Alexander, Antonucci, Aretxaga, Barcons, Bassani, Bondi, Boyle, Brandt, Burkert, C. Lonsdale, Caccianiga, Carrera, Cash, Chiappetti, Cohen, Coleman, Comastri, Comastri, D. Maccagni, Della Ceca, Dickey, Downes, Dye, E. Gosset, Eckart, Elvis, F. J. Carrera, F. Pacaud, Fiore, Fiore, Gallagher, Gandhi, Gandhi, Gandhi, Gavignaud, Gehrels, Giacconi, Gilli, Griffiths, Hickox, I. Gavignaud, J. A. Tedds, J. Ebrero, J. Surdej, Kewley, Kukula, L. Chiappetti, Lamareille, Lawrence, Le Fèvre, Le Fèvre, Lonsdale, M. J. Page, M. Krumpe, M. Pierre, M. Polletta, M. Tajer, M. Watson, Mainieri, Maiolino, Maiolino, Mateos, Moran, Murray, Nandra, O. Garcet, O. Le Fèvre, P. G. Sprimont, P. Gandhi, P. Vaisanen, Pacaud, Page, Page, Page, Page, Page, Panessa, Pappa, Perola, Pierre, Pierre, Polletta, Punsly, Ranalli, Risaliti, S. Mateos, S. Rosen, Setti, Severgnini, Severgnini, Silverman, Spergel, T. Contini, Tajer, Treister, Treister, Turner, V. Borkowski, Veilleux, W. Borczyk, Weingartner, Worsley   +104 more
core   +2 more sources

The X-ray binary population in M33: II. X-ray spectra and variability

, 2007
In this paper we investigate the X-ray spectra and X-ray spectral variability of compact X-ray sources for 3 Chandra observations of the Local Group galaxy M33. The observations are centered on the nucleus and the star forming region NGC 604.
A. Zezas, D.‐W. Kim, G. Fabbiano, H.‐J. Grimm, J. McDowell, Okada Y., Predehl P.   +6 more
core   +1 more source

AEGIS: A Multi-wavelength Study of Spitzer Power-law Galaxies

, 2010
This paper analyzes a sample of 489 Spitzer/IRAC sources in the Extended Groth Strip whose spectral energy distributions fit a red power law from 3.6 to 8.0 \micron. The median for sources with known redshift is =1.6.
Ashby, M. L. N., Barmby, P., Fazio, G. G., Georgakakis, A., Ivison, R. J., Konidaris, N. P., Miyazaki, S., Nandra, K., Park, S. Q., Rosario, D. J. V., Willner, S. P.   +10 more
core   +1 more source

Long-term X-ray Variability Study of IC342 from XMM-Newton Observations [PDF]

, 2010
We presented the results of an analysis of four XMM-Newton observations of the starburst galaxy IC342 taken over a four-year span from 2001 to 2005, with an emphasis on investigating the long-term flux and spectral variability of the X-ray point sources.
Albert K. H. Kong, Baker, Bauer, Belloni, Brandt, Buta, Böker, Chun S. J. Pun, Cutri, Daisy S. Y. Mak, de Vaucouleurs, Di Stefano, Di Stefano, Di Stefano, Di Stefano, Dodorico, Favata, Feng, Finlator, Freeman, Fridriksson, Greiner, Grimm, Hughes, Irwin, Kilgard, King, Kong, Kong, Kong, Kong, Kong, Kong, Kong, Kubota, Magnier, Mak, Meier, Mitsuda, Monet, Newton, Okada, Pakull, Schinnerer, Schlegel, Sivakoff, Snowden, Sugiho, van den Heuvel, Williams, Williams, Williams, Zezas   +52 more
core   +2 more sources

Mitochondrial fatty acid oxidation is stimulated by red light irradiation

FEBS Letters, EarlyView.
Light at different wavelengths has distinct effects on keratinocyte viability and metabolism. UVA light abrogates metabolic fluxes. Blue and green light have no effect on metabolic fluxes, while red light enhanced oxidative phosphorylation by promoting fatty acid oxidation. Keratinocytes are the primary constituents of sunlight‐exposed epidermis.
Manuel Alejandro Herrera, Camille C. Caldeira da Silva, Maiza Von Dentz, Mauricio S. Baptista, Alicia J. Kowaltowski   +4 more
wiley   +1 more source

The X-ray properties of high-z FRI candidates in the COSMOS field [PDF]

, 2011
We report the X-ray analysis of a sample of candidate high-redshift ...
Andreon, Antonucci, Balmaverde, Barkhouse, Becker, Best, Blackburn, Blandford, Capetti, Cappelluti, Cash, Chiaberge, Chiaberge, Chiaberge, Demarco, Donato, Donzelli, E. Tundo, Eisenhardt, Elvis, Evans, Evans, Fabian, Fanaroff, Fassbender, Ferrarese, Gawroński, Gebhardt, Gehrels, Ghisellini, Gladders, Gopal-Krishna, Hardcastle, Hasinger, Hill, Hopkins, Ilbert, Jackson, Kaiser, Kalberla, Komatsu, Ledlow, Lilly, Livio, M. Chiaberge, Muzzin, Nousek, Owen, Owen, P. Tozzi, Pierre, Prestage, Reynolds, Rosati, Santos, Scarpa, Schinnerer, Scoville, Suhada, Tanaka, Tozzi, Tozzi, Tremaine, Trump, Urry, Wilson, Xue, Zirbel   +67 more
core   +1 more source

The anti‐CRISPR protein AcrIE8.1 inhibits the type I‐E CRISPR‐Cas system by directly binding to the Cascade subunit Cas11

FEBS Letters, EarlyView.
In this study, we present the structure of AcrIE8.1, a previously uncharacterized anti‐CRISPR protein that inhibits the type I‐E CRISPR‐Cas system. Through a combination of structural and biochemical analyses, we demonstrate that AcrIE8.1 directly binds to the Cas11 subunit of the Cascade complex to inhibit the CRISPR‐Cas system.
Young Woo Kang, Hyun Ho Park
wiley   +1 more source

Structural insights into lacto‐N‐biose I recognition by a family 32 carbohydrate‐binding module from Bifidobacterium bifidum

FEBS Letters, EarlyView.
Bifidobacterium bifidum establishes symbiosis with infants by metabolizing lacto‐N‐biose I (LNB) from human milk oligosaccharides (HMOs). The extracellular multidomain enzyme LnbB drives this process, releasing LNB via its catalytic glycoside hydrolase family 20 (GH20) lacto‐N‐biosidase domain.
Xinzhe Zhang, Naoki Sunagawa, Toma Kashima, Kiyohiko Igarashi, Akimasa Miyanaga, Shinya Fushinobu   +5 more
wiley   +1 more source

The Caenorhabditis elegans DPF‐3 and human DPP4 have tripeptidyl peptidase activity

FEBS Letters, EarlyView.
The dipeptidyl peptidase IV (DPPIV) family comprises serine proteases classically defined by their ability to remove dipeptides from the N‐termini of substrates, a feature that gave the family its name. Here, we report the discovery of a previously unrecognized tripeptidyl peptidase activity in DPPIV family members from two different species.
Aditya Trivedi, Rajani Kanth Gudipati
wiley   +1 more source

Peptide‐based ligand antagonists block a Vibrio cholerae adhesin

FEBS Letters, EarlyView.
The structure of a peptide‐binding domain of the Vibrio cholerae adhesin FrhA was solved by X‐ray crystallography, revealing how the inhibitory peptide AGYTD binds tightly at its Ca2+‐coordinated pocket. Structure‐guided design incorporating D‐amino acids enhanced binding affinity, providing a foundation for developing anti‐adhesion therapeutics ...
Mingyu Wang, Grace Du, Charity Yongo‐Luwawa, Angelina Lu, Brett Kinrade, Kim Munro, Karl E. Klose, William D. Lubell, Peter Davies, Shuaiqi Guo   +9 more
wiley   +1 more source