Results 31 to 40 of about 16,231 (179)

From [NHC─H]• to Persistent σ‐Complex Radicals: Photoinduced Radical Chemistry of Imidazolium Salts

Angewandte Chemie International Edition, EarlyView.
Visible‐light excitation of electron donor–acceptor (EDA) complexes between imidazolium salts and triarylamines enables controlled single‐electron transfer (SET) and reveals a family of carbene‐centered σ‐complex radical cations. Cryogenic electron paramagnetic resonance (EPR) captures the elusive [NHC─H]• intermediate and its thermal evolution into ...
Filipp M. Kolomeychuk, Lars J. C. van der Zee, Simon Mathew, Bas de Bruin, J. Chris Slootweg   +4 more
wiley   +1 more source

Stemflow Dynamics in the Jamari National Forest (Brazilian Amazon): I. The Role of Tree Structure

Biotropica, Volume 58, Issue 3, May 2026.
A portion of rainfall that contacts tree canopies is drained down tree stems as stemflow. Stemflow is an underexamined component of rainfall partitioning in tropical forests. To investigate how tree canopy structural attributes influence stemflow in the Brazilian Amazon, we measured stemflow, rainfall, and dendrometric parameters of 56 trees in the ...
Jeferson Alberto de Lima, John Toland Van Stan II, Karolina Lewińska, Agnieszka Dradrach, Jakub Ceglarek, Kelly Cristina Tonello   +5 more
wiley   +1 more source

Bound state spectra of three-body muonic molecular ions

, 2011
The results of highly accurate calculations are presented for all twenty-two known bound $S(L = 0)-, P(L = 1)-, D(L = 2)-$ and $F(L = 3)-$states in the six three-body muonic molecular ions $pp\mu, pd\mu, pt\mu, dd\mu, dt\mu$ and $tt\mu$.
A. Halpern, A. M. Frolov, A.K. Bhatia, A.M. Frolov, A.M. Frolov, A.M. Frolov, A.M. Frolov, A.M. Frolov, A.M. Frolov, A.M. Frolov, A.M. Frolov, A.M. Frolov, A.M. Frolov, B.P. Carter, B.P. Carter, C.-Y. Hu, C.-Y. Hu, D. M. Wardlaw, D.H. Bailey, D.H. Bailey, D.H. Bailey, F.C. Frank, L.I. Men’shikov, L.M. Delves, L.W. Alvarez, M. Born, M. Kamimura, S. Kilic, S.I. Vinitskii, V.B. Bel’jaev, V.M. Bysrtitskii, V.M. Bysrtitskii, Ya.B. Zel’dovich, Yu.N. Petrov   +33 more
core   +1 more source

An apparatus for the production of high isotopic purity deuterium [PDF]

, 1974
An apparatus for the electrolytic preparation of high purity D2 is described. D2 with isotopic purity exceeding 99.98% (atomic percentage) was obtained with this apparatus by electrolysing D2O (99.8% isotopic purity) down to about 30% of its original ...
Kuppermann, A., Persky, A.
core   +1 more source

Soil Influences on Tree Species Distribution in a Rupestrian Cerrado Area

Floresta e Ambiente, 2018
This study aimed to analyze relations between the distribution of tree species and variations in soil texture, fertility and organic matter levels in a rupestrian cerrado area located in Diamantina-MG.
Daniel Dantas, Maria José Souza, Arthur Vieira, Marcio Oliveira, Israel Pereira, Evandro Machado, Claudio Marcio Souza, Wellington Rocha   +7 more
doaj   +1 more source

Photochemical Fuel Carrier Molecules for Robotic Embodied Energy

Advanced Materials, Volume 38, Issue 23, 22 April 2026.
We designed a novel fuel carrier photoresponsive molecule for on‐demand energy storage and release. Carrier molecules undergo bond scission under UV light to release chemical fuel and locally generate propulsive Marangoni flows. We demonstrate this photochemical embodied energy strategy in small‐scale robots and active matter systems, enabling ...
Chuqi Huang, Songah Jeong, Ji Woo Kim, Kanyarat Mantala, Zenghao Zhang, Hyungwoo Kim, Abdon Pena‐Francesch   +6 more
wiley   +1 more source

Magnetocatalytic Adiabatic Spin Torque Orbital Transformations for Novel Chemical and Catalytic Reaction Dynamics: The Little Effect [PDF]

, 2006
In this manuscript the theory and phenomena associated with the Little Effect are introduced as the spin induced orbital dynamics of confined fermions under strong magnetic and thermal environments.
Little, Reginald B.
core  

To move or to evolve: contrasting patterns of intercontinental connectivity and climatic niche evolution in “Terebinthaceae” (Anacardiaceae and Burseraceae) [PDF]

, 2014
Many angiosperm families are distributed pantropically, yet for any given continent little is known about which lineages are ancient residents or recent arrivals.
Andrea Weeks, Douglas C. Daly, Felipe Zapata, John D. Mitchell, Paul V. A. Fine, Susan K. Pell   +5 more
core   +2 more sources

Measuring deuterium concentration in water

Reviews in Analytical Chemistry
Deuterium is a heavy nonradioactive isotope of hydrogen, present in ocean water at a concentration of around 150 parts per million (ppm). In terrestrial nature, deuterium content in water varies by at least a factor of two, while in industry and research,
Zubarev Roman A., Uspenskaya Elena V., Vasil’ev Vasilii G., Levitskaya Olga V., Ivlev Vasilii A., Syroeshkin Anton V.   +5 more
doaj   +1 more source

Guidelines for Sample Preparation and Stable Isotope Analysis of Food for Traceability Studies

Food Safety and Health, Volume 4, Issue 2, Page 299-309, April 2026.
This workflow illustrates sample preparation and analysis steps in stable isotope ratio mass spectrometer (IRMS) for food traceability. It emphasizes standardized preparation, encapsulation, calibration, and quality control to ensure accurate, comparable isotope data critical for verifying food origin and authenticity across complex supply chains ...
Bayan Nuralykyzy, Syed Abdul Wadood, Jing Nie, Hanyi Mei, Shengzhi Shao, Yongzhi Zhang, Chunlin Li, Yuwei Yuan, Karyne M. Rogers   +8 more
wiley   +1 more source