Results 51 to 60 of about 3,432,026 (297)

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

X-ray and optical periodicities in X-ray binaries. I.A0535+26

, 2001
A homogeneous set of UBV photometry (354 data points obtained between 1983 and 1998) for the Be/X-ray binary A0535+26 = V725Tau is analysed, aiming to look for possible periodic component(s). After subtraction of the long-term variation it was found that
Clark, Finger, G. V. Zaitseva, Giovannelli, Gnedin, Hao, Heemskerk, Horne, Hutchings, Hutchings, Larionov, Lyuty, Motch, Nagase, Negueruela, Negueruela, Priedhorsky, Rosenberg, Schwarzenberg-Czerny, Sembay, V. Larionov, V. M. Lyuty   +21 more
core   +1 more source

The Identification of the X-ray Counterpart to PSR J2021+4026 [PDF]

, 2011
We report the probable identification of the X-ray counterpart to the gamma-ray pulsar PSR J2021+4026 using imaging with the Chandra X-ray Observatory ACIS and timing analysis with the Fermi satellite.
Abdo, Abdo, Abdo, Abdo, Alberto Carramiñana, Alice Harding, Allyn F. Tennant, Andrea Belfiore, Andrea De Luca, Arnaud, Atwood, Becker, Brazier, Camilo, Caraveo, Cheng, David J. Thompson, De Luca, Douglas A. Swartz, Gottfried Kanbach, Green, Harding, Harding, Hartman, Ho, Jackson, Landecker, Marcus Ziegler, Martin C. Weisskopf, Massimiliano Razzano, Matthew Kerr, Michael Dormody, Michel, Monet, Muslimov, Pablo Saz Parkinson, Paul S. Ray, Pavlov, Pavlov, Ransom, Ray, Roger W. Romani, Ronald F. Elsner, Saz Parkinson, Schwope, Skrutskie, Smith, Stephen L. O'Dell, Sturner, Takata, Tennant, Thompson, Trepl, Weisskopf, Wendker, Werner Becker, Wilms   +56 more
core   +3 more sources

Structural insights into an engineered feruloyl esterase with improved MHET degrading properties

FEBS Letters, EarlyView.
A feruloyl esterase was engineered to mimic key features of MHETase, enhancing the degradation of PET oligomers. Structural and computational analysis reveal how a point mutation stabilizes the active site and reshapes the binding cleft, expading substrate scope.
Panagiota Karampa, Konstantinos Makryniotis, Theofani‐Iosifina Sousani, Evangelos Topakas, Vangelis Daskalakis, Maria Dimarogona   +5 more
wiley   +1 more source

X-ray Temperatures, Luminosities, and Masses From XMM-Newton Follow-up of the First Shear-selected Galaxy Cluster Sample

, 2017
We continue the study of the first sample of shear-selected clusters (Wittman et al. 2006) from the initial 8.6 square degrees of the Deep Lens Survey (DLS, Wittman et al.
Deshpande, Amruta J., Hughes, John P., Wittman, David   +2 more
core   +1 more source

The Chandra X-ray Survey of Planetary Nebulae (ChanPlaNS): Probing Binarity, Magnetic Fields, and Wind Collisions [PDF]

, 2012
We present an overview of the initial results from the Chandra Planetary Nebula Survey (ChanPlaNS), the first systematic (volume-limited) Chandra X-ray Observatory survey of planetary nebulae (PNe) in the solar neighborhood.
Balick, B., Behar, E., Blackman, E., Bujarrabal, V., Chu, Y. -H., Corradi, R. L. M., De Marco, O., Frank, A., Frew, D. J., Guerrero, M. A., Kastner, J. H., Lopez, J. A., Miszalski, B., Montez Jr, R., Nordhaus, J., Parker, Q., Rapson, V., Sahai, R., Sandin, C., Schönberner, D., Soker, N., Sokoloski, J. L., Steffen, M., Ueta, T., Villaver, E., Zijlstra, A.   +25 more
core   +2 more sources

A methionine‐lined active site governs carbocation stabilization and product specificity in a bacterial terpene synthase

FEBS Letters, EarlyView.
This study reveals a unique active site enriched in methionine residues and demonstrates that these residues play a critical role by stabilizing carbocation intermediates through novel sulfur–cation interactions. Structure‐guided mutagenesis further revealed variants with significantly altered product profiles, enhancing pseudopterosin formation. These
Marion Ringel, Carl P. O. Helmer, Shani Zev, Ronja Driller, Emily Buhr, Markus Reinbold, Renana Schwartz, Gabriel Foley, Mikael Boden, Daniel Garbe, Gerhard Schenk, Dan Thomas Major, Bernhard Loll, Thomas Brück   +13 more
wiley   +1 more source

Star Formation in Orion's L1630 Cloud: an Infrared and Multi-epoch X-ray Study

, 2014
X-ray emission is characteristic of young stellar objects (YSOs) and is known to be highly variable. We investigate, via an infrared and multi-epoch X-ray study of the L1630 dark cloud, whether and how X-ray variability in young stellar objects is ...
Grosso, Nicolas, Hamaguchi, Kenji, Kastner, Joel H., Principe, David A., Richmond, Michael, Teets, William K., Weintraub, David A.   +6 more
core   +1 more source

LDAcoop: Integrating non‐linear population dynamics into the analysis of clonogenic growth in vitro

Molecular Oncology, EarlyView.
Limiting dilution assays (LDAs) quantify clonogenic growth by seeding serial dilutions of cells and scoring wells for colony formation. The fraction of negative wells is plotted against cells seeded and analyzed using the non‐linear modeling of LDAcoop.
Nikko Brix, Daniel Samaga, Katharina Gehr, Benedek Dankó, Mohamed Schumann, Guido Drexler, Ahmed Alnatsha, Georg Beyer, Ujjwal Mahajan, Martin Selmansberger, Julia Mayerle, Claus Belka, Horst Zitzelsberger, Kirsten Lauber   +13 more
wiley   +1 more source

Utilizing Quantum Annealing in Computed Tomography Image Reconstruction

IEEE Transactions on Quantum Engineering
One of the primary difficulties in computed tomography (CT) is reconstructing cross-sectional images from measured projections of a physical object. There exist several classical methods for this task of generating a digital representation of the object,
Kilian Dremel, Dimitri Prjamkov, Markus Firsching, Mareike Weule, Thomas Lang, Anastasia Papadaki, Stefan Kasperl, Martin Blaimer, Theobald O. J. Fuchs   +8 more
doaj   +1 more source