Results 51 to 60 of about 3,858,273 (345)

Magnetar-like X-ray Bursts from an Anomalous X-ray Pulsar [PDF]

, 2002
Anomalous X-ray Pulsars (AXPs) are a class of rare X-ray pulsars whose energy source has been perplexing for some 20 years. Unlike other, better understood X-ray pulsars, AXPs cannot be powered by rotation or by accretion from a binary companion, hence ...
A Tiengo, AI Ibrahim, BE Stern, BM Gaensler, C Kouveliotou, C Thompson, C Thompson, E Göǧüs¸, EV Gotthelf, FP Gavriil, GG Fahlman, GJ Fishman, J van Paradijs, K Jahoda, KA Arnaud, M Pivovaroff, P Chatterjee, PM Woods, QZ Liu, S Mereghetti, TE Strohmayer, VM Kaspi, VM Kaspi, VM Kaspi, WHG Lewin   +24 more
core   +2 more sources

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

Local structure of Amorphous carbon investigated by X-ray total scattering and RMC modeling

Scientific Reports
Amorphous carbon is a promising candidate as an energy storage material. In this paper, we performed an X-ray total scattering measurement, RMC modeling, and persistent homology analysis for amorphous carbon samples fabricated at two different heat ...
Masatsugu Yoshimoto, Kazuki Ito, Kazuhiko Omote   +2 more
doaj   +1 more source

Novel correction procedure for compensating thermal contraction errors in the measurement of the magnetic field of superconducting undulator coils in a liquid helium cryostat

Journal of Synchrotron Radiation
Superconducting undulators (SCUs) can offer a much higher on-axis undulator field than state-of-the-art cryogenic permanent-magnet undulators with the same period and vacuum gap.
Barbara Marchetti, Johann Baader, Sara Casalbuoni, Grigory Yakopov, Mikhail Yakopov   +4 more
doaj   +1 more source

The Chandra Deep Field-North Survey. XIV. X-ray detected Obscured AGNs and Starburst Galaxies in the Bright Submm Source Population

, 2002
We provide X-ray constraints and perform the first X-ray spectral analyses for bright (f_850>=5mJy; S/N>=4) SCUBA sources in an 8.4'x8.4' area of the 2 Ms Chandra Deep Field-North survey containing the Hubble Deep Field-North.
A. E. Hornschemeier, Blain A. W., C. Vignali, D. M. Alexander, D. P. Schneider, Downes D., F. E. Bauer, G. Chartas, G. P. Garmire, Maiolino R., Matt G., Matt G., Rengarajan T. N., Rowan-Robinson M., S. C. Gallagher, Severgnini P., Soucail G., Vignati P., W. N. Brandt, Zezas A.   +19 more
core   +1 more source

The quiescent X-ray emission of three transient X-ray pulsars [PDF]

, 2002
We report on BeppoSAX and Chandra observations of three Hard X-Ray Transients in quiescence containing fast spinning (P10 higher, testifying that the quiescent emission mechanism is different.
A. Moretti, A. N. Parmar, Campana S., Campana S., G. L. Israel, Illarionov A. F., L. Stella, M. Orlandini, Makishima K., Mavromatakis F., Mereghetti S., Nagase F., Ponman T. J., S. Campana, Wang Y.-M.   +14 more
core   +2 more sources

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

X-rays from Blue Compact Dwarf Galaxies

, 2011
We measured the X-ray fluxes from an optically-selected sample of blue compact dwarf galaxies (BCDs) with metallicities
Calzetti, Dale, Engelbracht, Giacconi, Gil de Paz, Griffith, Hopkins, Hunter, Hunter, Joseph Schmitt, Kaaret, Kennicutt, Kewley, Lee, Lynds, Mark Gorski, Philip Kaaret, Popescu, Relaño, Sargsyan, Schulte-Ladbeck, Telles, Thuan, van Zee, Wu, Wu   +25 more
core   +1 more source

The Challenge to Large Optical Telescopes from X-ray Astronomy [PDF]

, 2002
In the ROSAT era of the mid-1990's, the problems facing deep X-ray surveys could be largely solved with 10 m class telescopes. In the first decade of this new millennium, with X-ray telescopes such as the Chandra X-ray Observatory and XMM-Newton in ...
Hornschemeier, Ann E.
core   +3 more sources

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