Results 41 to 50 of about 149,407 (284)

Understanding Decoherence of the Boron Vacancy Center in Hexagonal Boron Nitride

Advanced Functional Materials, EarlyView.
State‐of‐the‐art computations unravel the intricate decoherence dynamics of the boron vacancy center in hexagonal boron nitride across magnetic fields from 0 to 3 T. Five distinct regimes emerge, dominated by nuclear spin interactions, revealing optimal coherence times of 1–20 µs in the 180–350 mT range for isotopically pure samples.
András Tárkányi, Viktor Ivády
wiley   +1 more source

Total N difference method and 15N isotope dilution methode - A comparative study on N-fixation [PDF]

, 2002
In the study, the 15N fixation of a number of green manure crops were studied using either the 15N dilution technique, or the simple total N difference method.
Müller, Dr. Torsten, Thorup-Kristensen, Dr. Kristian   +1 more
core  

NMR Studies of Escherichia Coli Acyl Carrier Protein: Dynamic and Structural Differences of the Apo- and Holo-forms [PDF]

, 2006
Two indicators of conformational variability of Escherichia coli acyl carrier protein (ACP) have been investigated, namely backbone dynamics and chemical shift variations of ACP.
Eletr, Ziad, Kim, Yangmee, Kovriguine, Evgueni   +2 more
core   +2 more sources

Reevaluating the Activity of ZIF‐8 Based FeNCs for Electrochemical Ammonia Production

Advanced Functional Materials, EarlyView.
Though receiving much attention, the field of electrochemical nitrogen reduction reaction (eNRR) to ammonia is marked by doubts about whether this reaction is possible in aqueous media. This work sheds light on this question for iron single‐atom on N‐doped carbon (FeNC) catalysts—a class of well‐known catalysts that is also worth testing for the sister
Caroline Schneider, S. Esmael Balaghi, Niklas Ortlieb, Patrick Elsaesser, Sima Heidari, Christopher S. Allen, Anna Fischer   +6 more
wiley   +1 more source

Freezing and chemical preservatives alter the stable isotope values of carbon and nitrogen of the Asiatic clam (Corbicula fluminea) [PDF]

, 2011
We tested the impacts of most common sample preservation methods used for aquatic sample materials on the stable isotope ratios of carbon and nitrogen in clams, a typical baseline indicator organism for many aquatic food web studies utilising stable ...
Aurélia Martino, B Fry, B Kelly, BJ Peterson, CJ Sweeting, DM Post, Dorothée Kopp, Frédéric Santoul, H Feuchtmayr, HC Sarakinos, J Dannheim, J Syväranta, J Syväranta, Jari Syväranta, KL Bosley, LM Barrow, M Ventura, MM Mullin, MS Edwards, NO Ogawa, Régis Céréghino, S Carabel, S Kaehler   +22 more
core   +5 more sources

Enhanced Nitric Oxide Electroreduction to Ammonia via Modulating Spin‐Polarization of Fe Single‐Atom Catalysts

Advanced Functional Materials, EarlyView.
A strategic spin‐polarization suppression in Fe single‐atom catalysts is proposed to enhance electrocatalytic reduction of NO to NH3. Employing a top‐down electrospinning strategy, self‐supported FeSAC with Fe‐N3S1 coordination structure and spin‐state transition is engineered from high‐spin to low‐spin.
Jialing Song, Ziqi Wei, Lupeng Han, Zhenlin Wang, Chenghao Fan, Donglin Han, Chunwei Dong, Haiyan Duan, Xiyang Wang, Sam Fong Yau Li, Eslam Hamed, Ming Xie, Emiliano Cortés, Dengsong Zhang   +13 more
wiley   +1 more source

The 15N-enrichment in dark clouds and Solar System objects

, 2013
The line intensities of the fundamental rotational transitions of H13CN and HC15N were observed towards two prestellar cores, L183 and L1544, and lead to molecular isotopic ratios 140 6 14N/15N 6 250 and 140 6 14N/15N 6 360, respectively.
Bonal, Lydie, Faure, Alexandre, Hily-Blant, Pierre, Quirico, Eric   +3 more
core   +2 more sources

Spectral Tuning of Hyperbolic Shear Polaritons in Monoclinic Gallium Oxide via Isotopic Substitution

Advanced Materials, EarlyView.
Spectral tuning of highly directional hyperbolic shear polaritons is realized via isotopic substitution of 16O to 18O in monoclinic β$\beta$‐phase gallium oxide. A red‐shift of almost 40 cm−1 is experimentally demonstrated with near‐field imaging, corroborated by the permittivity change extracted from far‐field experiments and density functional theory.
Giulia Carini, Mohit Pradhan, Elena Gelžinytė, Andrea Ardenghi, Saurabh Dixit, Maximilian Obst, Aditha S. Senarath, Niclas S. Mueller, Gonzalo Álvarez‐Pérez, Katja Diaz‐Granados, Ryan A. Kowalski, Richarda Niemann, Felix G. Kaps, Jakob Wetzel, Raghunandan Balasubramanyam Iyer, Piero Mazzolini, Mathias Schubert, J. Michael Klopf, Johannes T. Margraf, Oliver Bierwagen, Martin Wolf, Karsten Reuter, Lukas M. Eng, Susanne C. Kehr, Joshua D. Caldwell, Christian Carbogno, Thomas G. Folland, Markus R. Wagner, Alexander Paarmann   +28 more
wiley   +1 more source

Distinct nitrogen isotopic compositions of healthy and cancerous tissue in mice brain and head&neck micro-biopsies

BMC Cancer, 2021
Background Cancerous cells can recycle metabolic ammonium for their growth. As this ammonium has a low nitrogen isotope ratio (15N/14N), its recycling may cause cancer tissue to have lower 15N/14N than surrounding healthy tissue. We investigated whether,
M. Straub, D. M. Sigman, A. Auderset, J. Ollivier, B. Petit, B. Hinnenberg, F. Rubach, S. Oleynik, M.-C. Vozenin, A. Martínez-García   +9 more
doaj   +1 more source

15Nitrogen uptake from shallow- versus deep-rooted plants in multi-species mixtures and monoculture grassland [PDF]

, 2010
Only few studies have explored the importance of functional diversity in temperate agricultural grasslands in relation to nitrogen (N) uptake. This study investigates the consequence of growing deep-rooted plants together with grass-clover mixtures in ...
Eriksen, J., Høgh-Jensen, H., Pirhofer-Walzl, K., Rasmussen, J., Rasmussen, J., Søegaard, K.   +5 more
core