Results 91 to 100 of about 176,448 (289)

Chan–Lam Cross‐Coupling With Alkylboron Reagents: From Transmetallation to Radical Pathways

European Journal of Organic Chemistry, EarlyView.
Alkylative Chan–Lam coupling overcomes intrinsic transmetallation limitations of alkylboron reagents by engaging radical pathways. Recent advances reveal how radical and radical–polar crossover mechanisms enable mild C(sp3)—heteroatom bond formation. This minireview highlights key mechanistic insights and emerging strategies that transform alkylboron ...
Nicolas G.‐Simonian, Andrea Serafino, Luc Neuville, Géraldine Masson   +3 more
wiley   +1 more source

Seeing, Wind and Outer Scale Effects on Image Quality at the Magellan Telescopes

, 2010
We present an analysis of the science image quality obtained on the twin 6.5 metre Magellan telescopes over a 1.5 year period, using images of ~10^5 stars.
Floyd, David J. E., Prieto, Gabriel, Thomas-Osip, Jo   +2 more
core   +1 more source

Visible‐Light‐Promoted, (Photo)catalyst‐Free Synthesis of 3‐Sulfonyl‐Azaspiro[4.5]trienones via Arylazo Sulfones

European Journal of Organic Chemistry, EarlyView.
A set of 3‐sulfonyl‐azaspiro[4.5]trienones have been obtained via a metal‐ and photocatalyst‐free visible‐light‐driven dearomative strategy. The protocol exploits arylazo sulfones, which act simultaneously as the light absorber and sulfonyl‐radical source, enabling ipso‐spirocyclization of differently substituted N‐aryl propiolamides.
Luca Nicchio, Giulia Pompilio, Maurizio Fagnoni, Luc Neuville, Géraldine Masson, Stefano Protti   +5 more
wiley   +1 more source

Telescope and Researcher Potential of Turkey for Collaboration in CV Studies

Open Astronomy, 2012
Turkish astronomical community has witnessed the construction of several telescopes in the last 10 years. These telescopes and the potential of young researchers in the country motivated this poster presentation which aims to receive attention for ...
Saygac A. Talat, Alis Sinan
doaj   +1 more source

Blind Search for 21-cm Absorption Systems in New Generation Chinese Radio Telescopes

, 2017
Neutral hydrogen clouds are known to exist in the Universe, however their spatial distributions and physical properties are poorly understood. Such missing information can be studied by the new generation Chinese radio telescopes through a blind ...
Chen, Xuelei, Li, Di, Pen, Ue-Li, Yu, Hao-Ran, Zhang, Tong-Jie   +4 more
core   +2 more sources

Base‐Mediated Synthesis of Sulfur‐Substituted Imides using N‐(acyloxy)‐Tetrachlorophthalimides/Anhydrides and Alkyl Isothiouronium Salts

European Journal of Organic Chemistry, EarlyView.
An efficient, scalable, and versatile base‐triggered synthesis of sulfur‐substituted imides with the utility of alkyl isothiouronium salts and masked carboxylic acids under mild reaction conditions. Imides have a vast presence in pharmaceuticals and natural products, and their synthesis generally relies on the utility of the disagreeable strong ...
Malibongwe P. Shandu, Andile R. Ngwenya, Madelien Wooding, Jairus L. Lamola, Paseka T. Moshapo   +4 more
wiley   +1 more source

Design of a Hydroelectronic Solar‐Tracking System for Solar Panels

Energy Science &Engineering, EarlyView.
A prototype of a passive solar‐tracking system utilizing buoyant force based on water level was developed, and its MATLAB/Simulink model was implemented. This study is expected to encourage researchers to design solar‐tracking mechanisms using metals with different thermal expansion coefficients, air, oil, and other fluids. ABSTRACT This study presents
Ufuk Süğürtin, Türker Fedai Çavuş
wiley   +1 more source

Gaia serial charge transfer inefficiency modelling and radiation damage study

Astronomy & Astrophysics
During the course of its mission, ESA’s Gaia spacecraft has generated a map of the stars of the Galaxy of exquisite detail. While in its L2 orbit, the satellite has been exposed to high-energy cosmic rays and solar particles, which caused permanent ...
Pagani C., Hambly N. C., Davidson M., Rowell N., Crowley C., Collins R., van Leeuwen F., Seabroke G. M., Holland A., Barstow M. A., Evans D. W.   +10 more
doaj   +1 more source

Recent advances in multifunctional soft robots: A materials–structures–systems co‐design perspective for synergistic integration

FlexMat, EarlyView.
Abstract Soft robots, engineered from highly compliant materials, offer superior adaptability and safety in unstructured environments compared to their rigid counterparts. Recent advancements, fueled by bio‐inspiration and material programmability, have led to the rapid co‐evolution of their core modules: actuation, sensing, protection, energy, and ...
Qiulei Liu, Zicao Peng, Chong Sun, Haitao Yang   +3 more
wiley   +1 more source

A new broad K/Ka-band receiver (18.0–32.3 GHz) for the Yebes Observatory’s 40 meter radio telescope★

Astronomy & Astrophysics
Since 2010, the 40 m radio telescope of the Yebes Observatory has been devoted to very long baseline interferometry (VLBI) and single-dish observations. Up until 2019, it covered frequency bands between 2 GHz and 90 GHz in discontinuous and narrow radio ...
López-Pérez J. A., Tercero F., Gallego-Puyol J. D., Albo-Castaño C., Amils-Samalot R., Bautista-Durán M., Barbas L., Beltrán F., Díez-González M., García-Carreño P., García-Merino A., García-Pérez O., Gómez-Molina G., González-García J., López-Fernández I., Malo-Gómez I., Martínez-Parra A., Patino-Esteban M., Tercero B., Marcelino N., Esplugues G., Gallardo Cava I., García-Miró C., Gómez-Garrido M., Santander-García M., Tarrío P., Vidal-García A., de Vicente P., Cernicharo J.   +28 more
doaj   +1 more source