Results 61 to 70 of about 272,144 (300)

Satellite Internal Charging for a Reasonable Worst‐Case

Space Weather
Increases in the flux of high energy electrons in the Earth's radiation belts cause satellite charging which can lead to an electrostatic discharge, anomalies and disruption to service.
R. B. Horne, P. Y. Lam, N. P. Meredith, S. A. Glauert, P. Kirsch   +4 more
doaj   +1 more source

Correlation between stick-slip frictional sliding and charge transfer

, 2010
A decade ago, Budakian and Putterman (Phys. Rev. Lett., {\bf 85}, 1000 (2000)) ascribed friction to the formation of bonds arising from contact charging when a gold tip of a surface force apparatus was dragged on polymethylmethacrylate surface.
A. S. Nowick, G. Ananthakrishna, G. Ananthakrishna, Jagadish Kumar, K. L. Johnson, P. R. Nayak, R. W. Hertzberg   +6 more
core   +1 more source

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

Protolytic Reactions at Electrified TiO₂ P25 Interface: Quantitative and Thermodynamic Characterization

Molecules
Protolytic reactions on the surface of a titania photocatalyst (TiO2 P25 containing chlorine impurities) were studied using potentiometric and calorimetric acid-base titration. The impurity was removed by either washing or heat treatment.
Etelka Tombácz, Dániel Nesztor, Márta Szekeres, Hans Lewandowski, Erwin Klumpp, Renáta Gerencsér-Berta   +5 more
doaj   +1 more source

New experimental study on the DC flashover voltage of polymer insulators: combined effect of surface charges and air humidity

High Voltage, 2019
This research provides conclusions that can partially cover the lack of knowledge related to the effects of ambient atmospheric conditions on DC electric power transportation.
Mohammed Amer, Jeff Laninga, Jeff Laninga, William McDermid, David R. Swatek, David R. Swatek, Behzad Kordi   +6 more
doaj   +1 more source

Kapton charging characteristics: Effects of material thickness and electron-energy distribution [PDF]

, 1985
Charging characteristics of polyimide (Kapton) of varying thicknesses under irradiation by a very-low-curent-density electron beam, with the back surface of the sample grounded are reported.
Dulgeroff, C. R., Hymann, J., Viswanathan, R., Williamson, W. S.   +3 more
core   +1 more source

Spacecraft charging: incoming and outgoing electrons

, 2013
This paper presents an overview of the roles played by incoming and outgoing electrons in spacecraft surface and stresses the importance of surface conditions for spacecraft charging.
Lai, Shu T.
core   +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

Interaction of SBA-15 with Dilute Acetic Acid and Ammonia

Colloids and Interfaces
The SAXS pattern and pore volume of SBA-15 are not affected by aging SBA-15 with water, dilute acetic acid, and ammonia up for to 1 month, while the specific surface area is substantially depressed in interactions with basic solutions.
Marta Kalbarczyk, Sebastian Skupiński, Daniel Kamiński, Marek Kosmulski   +3 more
doaj   +1 more source

Infrared laser sampling of low volumes combined with shotgun lipidomics reveals lipid markers in palatine tonsil carcinoma

Molecular Oncology, EarlyView.
Nanosecond infrared laser (NIRL) low‐volume sampling combined with shotgun lipidomics uncovers distinct lipidome alterations in oropharyngeal squamous cell carcinoma (OPSCC) of the palatine tonsil. Several lipid species consistently differentiate tumor from healthy tissue, highlighting their potential as diagnostic markers.
Leonard Kerkhoff, Manuela Moritz, Dennis Eggert, Anna Worthmann, Joerg Heeren, Henrike Zech, Till S. Clauditz, Waldemar Wilczak, Hartmut Schlüter, Christian S. Betz, Arne Böttcher, Jan Hahn   +11 more
wiley   +1 more source