Results 91 to 100 of about 104,664 (293)

Iridium-Catalysed ortho-Directed Deuterium Labelling of Aromatic Esters—An Experimental and Theoretical Study on Directing Group Chemoselectivity

Molecules, 2015
Herein we report a combined experimental and theoretical study on the deuterium labelling of benzoate ester derivatives, utilizing our developed iridium N-heterocyclic carbene/phosphine catalysts.
Jennifer Devlin, William. J. Kerr, David M. Lindsay, Timothy J. D. McCabe, Marc Reid, Tell Tuttle   +5 more
doaj   +1 more source

Linker‐Locking Strategy for the Rigidification of Flexible Metal–Organic Framework: Structural Stabilization and Controlled ESIPT for H2O/D2O Sensing

Advanced Science, EarlyView.
A linker‐locking strategy rigidifies the flexible metal–organic framework (MOF) MIL‐53‐(OH)2 via the cooperative encapsulation of ligands and structural water. This network significantly enhances the framework's aqueous stability. Crucially, rigidification suppresses enol emission to yield a single keto tautomer state with an extended lifetime ...
Amitosh Sharma, Seonghwan Lee, Seo I Park, Hak‐Won Nho, Junmo Seong, Eunseo Lee, Oh‐Hoon Kwon, Myoung Soo Lah, Jaewoong Lim   +8 more
wiley   +1 more source

Solvent‐Free Synthesis of Ultrabright Carbon Dots With Near‐Unity Quantum Yield for High‐Performance Light‐Emitting Diodes

Advanced Science, EarlyView.
A rational, solvent‐free synthesis utilizing 2,6‐diaminonaphthalene produces ultrabright green‐emissive carbon dots. Regulated by a self‐limiting oxidative capping mechanism, excitons undergo ultrafast intra‐particle funneling from the nitrogen‐doped carbon core to emissive surface traps.
Hyeonjin Park, Su Hwan Lee, Sejeong Seo, Soye Park, Soo min Ji, Hyunda Jo, Sehyeon Park, Young‐Hoon Kim, Woosung Kwon   +8 more
wiley   +1 more source

Hydrogeochemical characteristics of the River Sava watershed in Slovenia

Geologija, 2007
The River Sava is a typical HCO3- – Ca2+ – Mg2+ River. Total alkalinity increases in the part of the watershed composed of carbonate and clastic rocks, which are less resistant to weathering processes.
Tjaša Kanduč, Nives Ogrinc
doaj  

Expanding the Isotopic Toolbox to Track Monarch Butterfly (Danaus plexippus) Origins and Migration: On the Utility of Stable Oxygen Isotope (δ18O) Measurements

Frontiers in Ecology and Evolution, 2019
The measurement of naturally occurring stable hydrogen (δ2H) and carbon (δ13C) isotopes in wings of the eastern North American monarch butterflies (Danaus plexippus) have proven useful to infer natal origins of individuals overwintering in Mexico.
Keith A. Hobson, Keith A. Hobson, Kevin J. Kardynal, Geoff Koehler   +3 more
doaj   +1 more source

Neutron generation during pulsed discharge in deuterium

, 2011
The process of neutron generation during pulsed discharge in inhomogeneous electric field in deuterium has been studied. At a deuterium pressure of several Torr, the generation of neutrons is possible with both deuterated and deuterium-free cathodes ...
Nechaev B.A., Tarasenko V.F., Yalovets A.P., Lomaev M.I., Sorokin D.A., Dudkin G.N., Padalko V.N., A. P. Yalovets, D. A. Sorokin, G. N. Dudkin, M. I. Lomaev, B. A. Nechaev, V. N. Padalko, V. F. Tarasenko   +13 more
core   +1 more source

Spin-polarized deuterium in magnetic traps [PDF]

, 1987
We have calculated the spin-exchange two-body rate constants associated with the population dynamics of the hyperfine levels of atomic deuterium as a function of magnetic field in the Boltzmann zero-temperature limit.
Stoof, H.T.C., Verhaar, B.J., Koelman, J.M.V.A., Walraven, J.T.M.   +3 more
core   +1 more source

Nascent Extracellular Matrix Converts Biomaterial Cues into Cell Fate Decisions

Advanced Science, EarlyView.
This study uncovers a tri‐directional interplay among cells, hydrogels, and their nascent extracellular matrix. Hydrogel norbornene modification alters CD44‐mediated cell–hydrogel interactions, which shape nascent matrix deposition, composition, and spatial organization.
Joshua Y. Liu, Ziqian Yang, Arina E. Velieva, Eleanor M. Plaster, Mingyue Fan, Donia W. Ahmed, Avinava Roy, Pamela Duran, Pamela Panovich, Alexandra S. Piotrowski‐Daspit, Carlos A. Aguilar, Megan L. Killian, Claudia Loebel   +12 more
wiley   +1 more source

Consumption of Water Similar to Martian Water in Terms of Deuterium Content by Mammals Leads to the Development of an Adaptation Syndrome and Activation of Protective Mechanisms Against Stress

Frontiers in Bioscience-Elite
Background: Deuterium is unevenly distributed in natural waters, while the same applies to the content of deuterium in ice on Mars. Moreover, changes in the deuterium content of drinking water are known to affect the bodies of mammals.
Stanislav Kozin, Alexandr Kravtsov, Oksana Lyasota, Anna Dorohova, Vasily Ivlev, Elena Chikhirzhina, Arkady Moiseev, Veronica Nesterova, Polina Babenkova, Konstantin Popov, Liliya Fedulova, Stepan Dzhimak   +11 more
doaj   +1 more source

Deuterium at high redshift

, 2012
We report the detection of neutral deuterium in the low-metallicity damped Lyman-α system at zabs = 2.621 towards the quasar CTQ 247. Using a high signal-to-noise and high spectral resolution (R = 60   000) spectrum from the Very Large Telescope ...
López, S., Molaro, P., Petitjean, P., P. Molaro, S. López, Noterdaeme, P., P. Noterdaeme, P. Petitjean, V. Dumont, C. Ledoux, Ledoux, C., Dumont, V.   +11 more
core   +1 more source