Results 91 to 100 of about 273,322 (239)

Cobalt‐Catalyzed [2σ+2π] Cycloaddition via Site‐Selective Capture of Bicyclobutane Diradical

Angewandte Chemie, EarlyView.
We report a Co(II)‐catalyzed strategy that combines thermal activation of bicyclo[1.1.0]butane (BCBs) with site‐selective radical capture to furnish head‐to‐head fused bicyclo[2.1.1]hexanes via [2σ+2π] cycloaddition with indoles. Detailed mechanistic studies (31P NMR, EPR, CV, and DFT) support the catalytic pathway, while phosphine‐oxide trapping and X‐
Tanmayee Nanda, Alexander Umanzor, Julia Gartzke, Jeremy T. Maddigan‐Wyatt, Philipp Thielert, Stefan Weber, Sabine Richert, Shuming Chen, Daniel B. Werz   +8 more
wiley   +2 more sources

Performance and Environmental Impact of Flexible Temperature Sensors on Cellulose‐Based Substrate

Advanced Electronic Materials, EarlyView.
Toward low‐environmental‐impact approach to thin‐film sensors fabrication using natural ingredient‐based triacetyl cellulose (TAC) substrate. Temperature sensors are fabricated and characterized based on thermal and mechanical performance. Substrate recovery is demonstrated by facile dissolution of a Mo‐based sensor in deionized water.
Dianne C. Corsino, Diego Ferri, Claudio Bonizzoni, Marco Affronte, Shuvaraj Ghosh, Stefania Benedetti, Alberto Rota, Antonio Ballestrazzi, Luca Pasquali, Ahmed Rasheed, Luisa Petti, Hafiza Faiqa Maqsood, Niko Münzenrieder, Roberto Rosa, Giuseppe Cantarella   +14 more
wiley   +1 more source

Hydrogen isotope labeling unravels origin of soil-bound organic contaminant residues in biodegradability testing

Nature Communications
Biodegradability testing in soil helps to identify safe synthetic organic chemicals but is still obscured by the formation of soil-bound ‘non-extractable’ residues (NERs).
Sophie Lennartz, Harriet A. Byrne, Steffen Kümmel, Martin Krauss, Karolina M. Nowak   +4 more
doaj   +1 more source

Products of a linoleic hydroperoxide-decomposing enzyme of alfalfa seed

Journal of Lipid Research, 1974
Alfalfa seeds and seedlings contain an enzyme that catalyzes a reaction with the 13- and 9-hydroperoxides of linoleic acid to form 13-hydroxy-10-oxo-trans-octadecenoic acid and 9-hydroxy-12-oxo-trans-10-octadecenoic acid, respectively.
Walter J. Esselman, C.O. Clagett
doaj   +1 more source

Gas–liquid chromatography–mass spectrometry of synthetic ceramides containing 2-hydroxy acids

Journal of Lipid Research, 1970
Ceramides containing either sphingosine or sphinganine and one of the 2-hydroxy acids, 14h:0, 16h:0, 18h:0, 20h:0, 22h:0, 24h:0, and 26h:0 were prepared and separated by gas chromatography as the 1,3,2'-tri-O-tri-methylsilyl derivatives.
S. Hammarström, B. Samuelsson, K. Samuelsson   +2 more
doaj   +1 more source

Recent Advances in the Preparation of Deuterium-Labeled Chemicals via Heterogeneous Catalysis

Journal of Isotopes
Deuterium-labeled compounds play an irreplaceable role in fields such as medicine R&D，analytical testing，and materials science. There is an urgent need to develop efficient deuteration methods to address the challenges faced in the preparation of ...
Zimeng ZHAO, Fujia GAO, Xiangyi LIU, Guangping HAO   +3 more
doaj   +1 more source

Characterization and relative quantification of phospholipids based on methylation and stable isotopic labeling[S]

Journal of Lipid Research, 2016
Phospholipids (PLs), one of the lipid categories, are not only the primary building blocks of cellular membranes, but also can be split to produce products that function as second messengers in signal transduction and play a pivotal role in numerous ...
Tanxi Cai, Qingbo Shu, Peibin Liu, Lili Niu, Xiaojing Guo, Xiang Ding, Peng Xue, Zhensheng Xie, Jifeng Wang, Nali Zhu, Peng Wu, Lili Niu, Fuquan Yang   +12 more
doaj   +1 more source

Use of Deuterium Labeling Studies to Determine the Stereochemical Outcome of Palladium Migrations during an Asymmetric Intermolecular Heck Reaction

, 2016
A series of deuterium labeling experiments showed that Pd migrations during an intermolecular asymmetric Heck reaction between phenyl triflate and various deuterated 2,3-dihydrofurans (2b, 2c, 2d, 2e) occurs exclusively by either syn-1,2-dyotropic shifts
Brian A. Keay (2320924), Bronwen M. M. Wheatley (2476534)   +1 more
core   +1 more source

Noninvasive 3-Dimensional 1 H-Magnetic Resonance Spectroscopic Imaging of Human Brain Glucose and Neurotransmitter Metabolism Using Deuterium Labeling at 3T : Feasibility and Interscanner Reproducibility. [PDF]

Invest Radiol, 2023
Niess F, Hingerl L, Strasser B, Bednarik P, Goranovic D, Niess E, Hangel G, Krššák M, Spurny-Dworak B, Scherer T, Lanzenberger R, Bogner W.   +11 more
europepmc   +1 more source

Deuterium magnetic resonance imaging of tumors using low-dose systemic deuterated water labeling

Frontiers in Oncology
BackgroundAlthough systemic 2H2O labeling is an attractive clinically relevant strategy for enhancing tumor imaging given relative ease of administration, gradual, slow ramp-up of labeling is preferable to avoid side effects, such as nausea and dizziness.
Mingchen He, Jill M. Duzen, Terri Larus, Hunter Reavis, Steven G. Turowski, Michael E. Feigin, Don E. Farthing, Joseph A. Spernyak, Nataliya Prokopenko Buxbaum   +8 more
doaj   +1 more source