Results 71 to 80 of about 83,260 (295)

Nitrogen‐Centered Organic Persistent Radicals Catalyze Redox‐Neutral C─C Bond Forming Reactions

Angewandte Chemie, EarlyView.
Kuhn verdazyls, discovered over 60 years ago, are shown as effective catalysts for the first time. Their tunable redox properties enable organocatalytic redox‐neutral C─H arylation and C─H trifluoromethylation reactions without light activation.
Shrouq Mujahed, Jaysan Janabel, Kundan Shaw, Roberta Cagliani, Tynchtyk Amatov   +4 more
wiley   +2 more sources

The Chromospheric Telescope [PDF]

Astronomy & Astrophysics, 2011
12 pages, 9 ...
C. Beck, Christian Bethge, Christian Bethge, T. J. Kentischer, Hardi Peter, C. Halbgewachs, David Elmore   +6 more
openaire   +4 more sources

Critical Electrochemistry Technologies Applicable in Space Exploration

Advanced Science, EarlyView.
The available resources in space and discuss the application scenarios and challenges of electrochemical methods in four critical domains is analyzed: metallurgical processing of mineral resources, water resources utilization, carbon cycle management in extraterrestrial habitats, and electrical energy storage.
Ruisi Xu, Zepeng Lv, Shaolong Li, Jilin He, Jianxun Song   +4 more
wiley   +1 more source

Synthesis of Thiophenes from Pyridines Using Elemental Sulfur

Angewandte Chemie, EarlyView.
Thiophenes can be disconnected to pyridines through a novel formal [4 + 1] treatment of Zincke ketones with elemental sulfur. In situ ring‐opening of the π‐deficient heteroarene gives an extended diene, which undergoes simple reaction with octasulfur to give the π‐excessive thiophene.
Zi Liu, Michael F. Greaney
wiley   +2 more sources

Wide Linearity Range and Rapid‐Response Tactile Sensor Inspired by Parallel Structures

Advanced Science, EarlyView.
Inspired by parallel structures, a composite tactile sensor design is proposed using parallel elastomer integration, developing two novel sensors. This strategy optimizes the force‐electric response and viscoelastic hysteresis of the conductive composite, achieving a balanced enhancement of linear sensing range and fast response.
Weihua Gao, Jiantao Yao, Xianhe Yu, Guoliang Ma, Dakai Wang, Hongnian Yu, Zhiwu Han, Luquan Ren   +7 more
wiley   +1 more source

The Origins Space Telescope [PDF]

Nature Astronomy, 2018
The Origins Space Telescope, one of four large Mission Concept studies sponsored by NASA for review in the 2020 US Astrophysics Decadal Survey, will open unprecedented discovery space in the infrared, unveiling our cosmic origins. We briefly describe in this article the key science themes and architecture for OST.
Battersby, Cara, Armus, Lee, Bergin, Edwin, Kataria, Tiffany, Meixner, Margaret, Pope, Alexandra, Stevenson, Kevin B., Cooray, Asantha, Leisawitz, David, Scott, Douglas, Bauer, James, Bradford, C. Matt, Ennico, Kimberly, Fortney, Jonathan J., Kaltenegger, Lisa, Melnick, Gary J., Milam, Stefanie N., Narayanan, Desika, Padgett, Deborah, Pontoppidan, Klaus, Roellig, Thomas, Sandstrom, Karin, Su, Kate Y. L., Vieira, Joaquin, Wright, Edward, Zmuidzinas, Jonas, Staguhn, Johannes, Sheth, Kartik, Benford, Dominic, Mamajek, Eric E., Neff, Susan Gale, Carey, Sean, Burgarella, Denis, de Beck, Elvire, Gerin, Maryvonne, Helmich, Frank P., Moseley, S. Harvey, Sakon, Itsuki, Wiedner, Martina C., Stevenson, Kevin, Fortney, Jonathan, Melnick, Gary, Milam, Stefanie, Su, Kate, Mamajek, Eric, Neff, Susan, Helmich, Frank   +46 more
openaire   +7 more sources

Determining Exciton Diffusion Length in Organic Semiconductors: Unifying Macro‐ and Microscopic Perspectives

Advanced Energy Materials, EarlyView.
Exciton diffusion length in organic semiconductor films is determined from encounter/annihilation rates. Non‐normalized exciton densities and proper intrinsic lifetime reference avoid over‐parametrization of the fits. Monte Carlo Simulation of individual molecule‐to‐molecule hops reproduce these results (②) when matching lattice constant and hoping ...
Wenchao Yang, Catherine S. Pursglove De Castro, Safakath Karuthedath, Yuliar Firdaus, Nisreen Alshehri, Si Chen, Diego Rosas Villalva, Christopher E. Petoukhoff, Amr Dahman, Derya Baran, Thomas D. Anthopoulos, Frédéric Laquai, Julien Gorenflot   +12 more
wiley   +1 more source

The gamma-ray Cherenkov telescope for the Cherenkov telescope array [PDF]

AIP Conference Proceedings, 2017
The Cherenkov Telescope Array (CTA) is a forthcoming ground-based observatory for very-high-energy gamma rays. CTA will consist of two arrays of imaging atmospheric Cherenkov telescopes in the Northern and Southern hemispheres, and will combine telescopes of different types to achieve unprecedented performance and energy coverage.
Tibaldo, L., Abchiche, A., Allan, D., Amans, J. -P., Armstrong, T. P., Balzer, Agnès, Berge, D., Boisson, C., Bousquet, J. -J., Brown, A. M., Bryan, M., Buchholtz, G., Chadwick, P. M., Costantini, H., Cotter, G., Daniel, M. K., de Franco, A., de Frondat, F., Dournaux, J. -L., Dumas, D., Ernenwein, J.-P., Fasola, G., Funk, S., Gironnet, J., Graham, J. A., Greenshaw, T., Hervet, O., Hidaka, N., Hinton, J. A., Huet, J. -M., Jankowsky, D., Jegouzo, I., Jogler, T., Kraus, M., Lapington, J. S., Laporte, P., Lefaucheur, J., Markoff, S., Melse, T., Mohrmann, L., Molyneux, P., Nolan, S. J., Okumura, A., Osborne, J. P., Parsons, R. D., Rosen, S., Ross, D., Rowell, G., Rulten, C. B., Sato, Y., Sayede, F., Schmoll, J., Schoorlemmer, H., Servillat, M., Sol, H., Stamatescu, V., Stephan, M., Stuik, R., Sykes, J., Tajima, H., Thornhill, J., Trichard, C., Vink, J., Watson, J. J., White, R., Yamane, N., Zech, A., Zink, A., Zorn, J., Consortium, The Cta   +69 more
openaire   +5 more sources

Hybrid rule‐based and optimization‐driven framework for the synthesis of end‐to‐end optimal pharmaceutical processes

AIChE Journal, EarlyView.
Abstract The modernization of pharmaceutical manufacturing is driving a shift from traditional batch processing to continuous alternatives. Synthesizing end‐to‐end optimal (E2EO) manufacturing routes is crucial for the pharmaceutical industry, especially when considering multiple operating modes—such as batch, continuous, or hybrid (containing both ...
Yash Barhate, Daniel J. Laky, Daniel Casas‐Orozco, Gintaras V. Reklaitis, Zoltan K. Nagy   +4 more
wiley   +1 more source

Discrete Time Dynamic Model for Telescope Auto-Guiding System [PDF]

Journal of Astronomy and Space Sciences, 2007
In the auto-guiding system for obtaining a long exposure astrophotography, CCD camera is usually used for measuring guide errors which are affected by optical dispersion and mechanical disturbances.
Joon Hwa Lee
doaj   +1 more source