Results 31 to 40 of about 9,208 (192)

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

Angewandte Chemie, Volume 138, Issue 24, 8 June 2026.
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

Estudo fitoquímico e farmacológico de Protium kleinii (Burseraceae) [PDF]

, 2001
Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Físicas e Matemáticas. Programa de Pós-Gradução em Química.As espécies do gênero Protium (Burseraceae) são conhecidas pela produção de exsudatos oleoresinosos e suas ...
Lima, Fabiana Vieira
core  

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

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

Propagação vegetativa do Protium spp: Protium heptaphyllum, Protium spruceanum e Protium guacayanum. [PDF]

, 2019
Desenvolver tecnologias para propagação vegetativa do Protium sp., utilizando diferentes métodos de clonagem.Dissertação (Mestrado em Biotecnologia e Recursos Naturais) - Universidade do Estado do Amazonas, Manaus. Coorientador: Dra.
LIMA, S. C. de S.
core  

Unveiling the Power of Deuterium in Drug Discovery: A Comprehensive Overview

MedComm, Volume 7, Issue 6, June 2026.
The role of deuterium replacement in drug discovery, its progress, opportunities, and challenges. ABSTRACT Deuterium, the heavy isotope of hydrogen, has unfolded as a cornerstone in modern drug discovery due to its potential to influence metabolic stability and pharmacokinetic behavior.
Mukta Lele, Ajit Manchare, Swapnali Parit, Amol D. Gholap, Krishna Jadhav, Navnath Hatvate, Keshav Raj Paudel, Satish Rojekar   +7 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

Bracon zuleideae Perioto & Lara (Hymenoptera, Braconidae): seed predation potential, expansion of the geographic distribution and new data on host plant phenology

EntomoBrasilis, 2019
. Here, by the first time, was quantified the predation of seeds of Protium ovatum Engl. (Burseraceae) by Bracon zuleideae Perioto & Lara (Hymenoptera, Braconidae), a phytophagous seed eater, in Parque Nacional Grande Sertão Veredas, located in the State
Nelson Wanderley Perioto, Rogéria Inês Rosa Lara, Danielle Roberta Versuti   +2 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

Investigation of H-mode density limit in mixed protium–deuterium plasmas at JET with ITER-like wall

Nuclear Materials and Energy
Analysis of comparable discharges fuelled by either deuterium or protium reveals a clear relationship between the isotope mass and the H-mode density limit.
A. Huber, G. Sergienko, M. Groth, D. Keeling, M. Wischmeier, D. Douai, E. Lerche, C. Perez von Thun, S. Brezinsek, V. Huber, A. Boboc, M. Brix, I.S. Carvalho, A.V. Chankin, E. Delabie, I. Jepu, V. Kachkanov, V. Kiptily, K. Kirov, Ch. Linsmeier, E. Litherland-Smith, C.G. Lowry, C.F. Maggi, J. Mailloux, A.G. Meigs, Ph. Mertens, M. Poradzinski, K.-D. Zastrow, M. Zlobinski   +28 more
doaj   +1 more source