Results 51 to 60 of about 1,474,810 (297)

Crack formation in vacuum concrete

Journal of Civil Engineering and Management, 2002
The reasons of crack formation in vacuum concrete floors with reinforcing mineral wear-resistant coating were investigated. The main reasons of crack formation are connected with low concrete strength due to the lack of water for cement hydration, the ...
Grigory Yakovlev, Nikolai Khokhriakov
doaj   +1 more source

Persistent X-Ray Photoconductivity and Percolation of Metallic Clusters in Charge-Ordered Manganites

, 1999
Charge-ordered manganites of composition $\rm Pr_{1-x}(Ca_{1-y}Sr_{y})_{x}MnO_3$ exhibit persistent photoconductivity upon exposure to x-rays. This is not always accompanied by a significant increase in the {\it number} of conduction electrons as ...
B Keimer, D Casa, J. P Hill, Lang D. V., O. A Saleh, Pollak M., V Kiryukhin, Y Tokura, Y Tomioka   +8 more
core   +2 more sources

The planar cell polarity protein Vangl2 interacts with the PDZ‐domains of Scribble but not with a unique PDZ‐like domain in Inturned

FEBS Letters, EarlyView.
Structural and biochemical characterisations show that the planar cell polarity (PCP) protein Inturned harbours a unique PDZ‐like domain that does not bind canonical PDZ‐binding motifs (PBMs) like that of another PCP protein Vangl2. In contrast, the apical‐basal polarity protein Scribble contains four PDZ domains that bind Vangl2, but one PDZ domain ...
Stephan Wilmes, Jan Brysch, Carmen Gelze, Lilli Meier, Daniel Kümmel   +4 more
wiley   +1 more source

A possible phase dependent absorption feature in the transient X-ray pulsar SAX J2103.5+4545

, 2017
We present an X-ray spectral and timing analysis of two $NuSTAR$ observations of the transient Be X-ray binary SAX J2103.5+4545 during its April 2016 outburst, which was characterized by the highest flux since $NuSTAR$'s launch.
Ballhausen, Ralf, Brumback, McKinley C., Fürst, Felix S., Hemphill, Paul, Hickox, Ryan C., Pottschmidt, Katja, Tomsick, John A., Wilms, Jörn   +7 more
core   +1 more source

Probing the outer edge of an accretion disk : a Her X-1 turn-on observed with RXTE [PDF]

, 2005
We present the analysis of Rossi X-ray Timing Explorer (RXTE) observations of the turn-on phase of a 35 day cycle of the X-ray binary Her X-1. During the early phases of the turn-on, the energy spectrum is composed of X-rays scattered into the line of ...
Bai, Becker, Boyd, Brainerd, Burwitz, Cheng, Coburn, Dal Fiume, Davison, Deeter, Giacconi, Gruber, J. Wilms, K. A. Postnov, Kaastra, Katz, Kuster, Kylafis, Leahy, Lightman, M. Kuster, Maloney, Miller, N. I. Shakura, Nowak, Oosterbroek, Parmar, Parmar, Parmar, R. E. Rothschild, R. Staubert, Schandl, Schandl, Scott, Scott, Shakura, Shakura, Tananbaum, Trümper, Verner, Vrtilek, Vrtilek, W. A. Heindl, Wilms, Wilms   +44 more
core   +2 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

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

Application of X-ray computed tomography in soil and plant -a review

Frontiers in Environmental Science, 2023
X-ray computed tomography (X-ray CT) is a non-destructive method of soil analysis which can provide three-dimensional (3D) view, quantitative information of the internal organization of the soil.
Tridiv Ghosh, Pragati Pramanik Maity, Sheikh M. F. Rabbi, Sheikh M. F. Rabbi, T. K. Das, Ranjan Bhattacharyya   +5 more
doaj   +1 more source

Peroxidasin enables melanoma immune escape by inhibiting natural killer cell cytotoxicity

Molecular Oncology, EarlyView.
Peroxidasin (PXDN) is secreted by melanoma cells and binds the NK cell receptor NKG2D, thereby suppressing NK cell activation and cytotoxicity. PXDN depletion restores NKG2D signaling and enables effective NK cell–mediated melanoma killing. These findings identify PXDN as a previously unrecognized immune evasion factor and a potential target to improve
Hsu‐Min Sung, David Bickel, Lena C. M. Krause, Daria Ezeriņa, Christian Ickes, Julian Wojtachnia, Christine S. Gibhardt, Magdalena Shumanska, Khadija Wahni, Andrea Paluschkiwitz, Julia Malo Pueyo, Ekaterina Baranova, Wim Vranken, Hedwig Stanisz, Ioana Stejerean‐Todoran, Michael P. Schön, Joris Messens, Ivan Bogeski   +17 more
wiley   +1 more source

Variation in Emission and Absorption Lines and Continuum Flux by Orbital Phase in Vela X-1

, 2004
High resolution spectral studies were undertaken at orbital phases 0, 0.25 and 0.5 on the high-mass X-ray binary (HMXB) Vela X-1 using archival Chandra data.
Bessell M. S., David Blank, David P. Huenemoerder, Dumm T., Feldmeier A., Greg Goldstein, Kaastra J. S., Kaper L., Kreykenbohm I., Matt G., Nagase F., Raubenheimer B. C., van Kerkwijk M. H.   +12 more
core   +1 more source