Results 31 to 40 of about 542 (178)

Towards perfectly linearly polarized x-rays

Physical Review Research, 2022
In recent years, high-precision x-ray polarimeters have become a key method for the investigation of fundamental physical questions from solid-state physics to quantum optics.
Kai S. Schulze, Benjamin Grabiger, Robert Loetzsch, Berit Marx-Glowna, Annika T. Schmitt, Alejandro Laso Garcia, Willi Hippler, Lingen Huang, Felix Karbstein, Zuzana Konôpková, Hans-Peter Schlenvoigt, Jan-Patrick Schwinkendorf, Cornelius Strohm, Toma Toncian, Ingo Uschmann, Hans-Christian Wille, Ulf Zastrau, Ralf Röhlsberger, Thomas Stöhlker, Thomas E. Cowan, Gerhard G. Paulus   +20 more
doaj   +1 more source

Revisiting Securidaca longipedunculata Seed Oil: Applying NMR and Mass Spectroscopy to Confirm the Presence of 2‐Acetyl‐1,3‐Diacyl–sn‐Glycerols and Conjugated Hydroxydienoic Fatty Acids

Journal of the American Oil Chemists' Society, EarlyView.
The manuscript confirms and expands on previous reports concerning the presence of unusual conjugated hydroxydienoic fatty acids and acetyl‐TAG in the seed oil of Securidaca longipedunculata. The location of acetate only at sn‐2 of TAG was conclusively shown by high resolution NMR and hydroxy seed fatty acids are characterized.
Mark A. Smith, Jianfeng Zhu, Jin‐Yue Sun   +2 more
wiley   +1 more source

Training a Dataset Simulated Using RGB Images for an End-to-End Event-Based DoLP Recovery Network

Photonics
Event cameras are bio-inspired neuromorphic sensors that have emerged in recent years, with advantages such as high temporal resolutions, high dynamic ranges, low latency, and low power consumption.
Changda Yan, Xia Wang, Xin Zhang, Conghe Wang, Qiyang Sun, Yifan Zuo   +5 more
doaj   +1 more source

Impact of three-dimensional polarization profiles on spin-dependent measurements in colliding beam experiments

Physical Review Special Topics. Accelerators and Beams, 2012
We derive the effect of 3-dimensional polarization profiles on the measured polarization in polarimeters, as well as the observed polarization and the polarization-weighted luminosity (figure of merit) in single and double spin measurements in colliding ...
Wolfram Fischer, Alexander Bazilevsky
doaj   +1 more source

Derivation of Instrument Requirements for Polarimetry Using Mg, Fe, and Mn Lines between 250 and 290 nm

The Astrophysical Journal, 2023
Judge et al. recently argued that a region of the solar spectrum in the near-UV between about 250 and 290 nm is optimal for studying magnetism in the solar chromosphere, due to an abundance of Mg ii , Fe ii , and Fe i lines that sample various heights in
A. G. de Wijn, P. G. Judge, R. Ezzeddine, A. Sainz Dalda   +3 more
doaj   +1 more source

Synthesis and Characterization of Hemiindigo‐Based Glycoside and Glycomacrocycle

Chemistry – A European Journal, EarlyView.
Glycosyl hemiindigos: we have synthesized hemiindigo‐functionalized glycoside and glycomacrocycle which are photoswitchable under visible light irradiation with high photoconversion yield and fluorescence emission property in acetonitrile. The conformational constrained glycomacrocycle displayed more efficient photoisomerization.
Guilhem Fontaine, Rémi Métivier, Guillaume Laurent, Régis Guillot, Juan Xie   +4 more
wiley   +1 more source

An Investigation Into the Yields of 3,4‐Methylenedioxyphenyl‐2‐propanone (MDP2P) From Glycidate Pre‐Precursors

Drug Testing and Analysis, EarlyView.
Hydrolysis of the glycidate pre‐precursors MMDMG and EMDMG was evaluated for MDP2P production. Acid hydrolysis of MMDMG (HCl, 100°C, 18 h) yielded the highest MDP2P recovery (79%), whereas base hydrolysis produced only slightly lower yields (73%), demonstrating both pathways are effective routes to this key MDMA precursor.
Alexandra L. Mercieca, Ella S. Schuett, Andrew M. McDonagh, Shanlin Fu, Morgan Alonzo   +4 more
wiley   +1 more source

GASP-Galway astronomical Stokes polarimeter

EPJ Web of Conferences, 2010
The Galway Astronomical Stokes Polarimeter (GASP) is an ultra-high-speed, full Stokes, astronomical imaging polarimeter based upon a Division of Amplitude Polarimeter.
Shearer A., Redfern M., Collins P., Sheehan B., Kyne G.   +4 more
doaj   +1 more source

Improved Absolute Polarization Calibrator for BICEP CMB Polarimeters [PDF]

EPJ Web of Conferences
Cosmic birefringence is a hypothesized parity violation in electromagnetism that predicts a frequency-independent polarization rotation as light propagates.
Polish A. R., Ade P. A. R., Ahmed Z., Amiri M., Barkats D., Thakur R. Basu, Bischoff C. A., Beck D., Bock J. J., Boenish H., Buza V., Cantrall B., IV J. R. Cheshire, Connors J., Cornelison J., Crumrine M., Cukierman A. J., Denison E., Duband L., Echter M., Eiben M., Elwood B. D., Fatigoni S., Filippini J. P., Fortes A., Gao M., Giannakopoulos C., Goeckner-Wald N., Goldfinger D. C., Gratton S., Grayson J. A., Greathouse A., Grimes P. K., Hall G., Halal G., Halpern M., Hand E., Harrison S. A., Henderson S., Hoang T. D., Hubmayr J., Hui H., Irwin K. D., Kang J. H., Karkare K. S., Kefeli S., Kovac J. M., Kuo C., Lasko K., Lau K. K., Lautzenhiser M., Lennox A., Liu T., Mackey S., Maher N., Megerian K. G., Minutolo L., Moncelsi L., Nakato Y., Nguyen H. T., OBrient R., Paine S. N., Patel A., Petroff M. A., Prouve T., Pryke C., Reintsema C. D., Romand T., Salatino M., Schillaci A., Schmitt B., Singari B., Soliman A., Germaine T. St., Steiger A., Steinbach B., Sudiwala R., Thompson K. L., Tsai C., Tucker C., Turner A. D., Vergès C., Vieregg A. G., Wandui A., Weber A. C., Willmert J., Wu W. L. K., Yang H., Yu C., Zheng L., Zhang C., Zhang S.   +91 more
doaj   +1 more source

Fluorinated Iminosugar Glycomimetics: Synthesis and Activity as GCase Ligands

European Journal of Organic Chemistry, EarlyView.
DAST‐mediated deoxyfluorination of suitably functionalized piperidines provided regio‐ and stereoselective access to fluorinated piperidine and pyrrolidine glycomimetics, the latter arising from an unusual ring‐contraction process. Fluorination generally enhanced β‐glucocerebrosidase (GCase) inhibitory potency, but lost PC activity toward L444P/L444P ...
Francesca Mangiavacchi, Alessio Morano, Cosimo Margheri, Cristina Faggi, Amelia Morrone, Camilla Matassini, Francesca Clemente, Andrea Goti, Martina Cacciarini, Francesca Cardona   +9 more
wiley   +1 more source