Results 101 to 110 of about 88,577 (294)

Potassium‐Ligand Cooperation Facilitated Chemical Bond Activation and Catalytic Hydrogenation

Angewandte Chemie, EarlyView.
A new strategy for alkali metal‐mediated catalysis based on metal–ligand cooperation (MLC) is presented. Potassium pincer complexes exhibit remarkable reactivity toward a range of molecules via an unprecedented potassium–ligand cooperative mechanism. This reactivity enables potassium‐catalyzed hydrogenation, providing efficient reduction of ketones and
Yaoyu Liang, Irena Efremenko, Thiyagarajan Subramanian, Amit Kumar, Liat Avram, Yael Diskin‐Posner, David Milstein   +6 more
wiley   +2 more sources

Localizing carbohydrate binding sites in proteins using hydrogen/deuterium exchange mass spectrometry

, 2016
The application of hydrogen/deuterium exchange mass spectrometry (HDX-MS) to localize ligand binding sites in carbohydrate-binding proteins is described.
Kitova, Elena N., Li, Jun, Ng, Kenneth, Zhang, Jingjing, Eugenio, Luiz, Klassen, John S.   +5 more
core   +2 more sources

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

The Global Stratotype Section and Point (GSSP) for the base of the Holocene Series/Epoch (Quaternary System/Period) in the NGRIP ice core

, 2008
The Greenland ice core from NorthGRIP (NGRIP) contains a proxy climate record across the Pleistocene– Holocene boundary of unprecedented clarity and resolution.
Rasmussen, Sune Olander, Hoek, Wim Z., Steffensen, Jørgen Peder, Johnsen, Sigfus Johann, Steffensen, J. P., Rasmussen, Sune Ander, Steffensen, Jorgen-Peder, Schwander, Jakob, Andrews, John, Hoek, Wim, Walker, Mike, Gibbard, Philip, Hughen, Konrad, Walker, M., Litt, T., Kershaw, P., Johnsen, Sigfus, Kershaw, Peter, Popp, T., Steffensen, Jørgen-Peder, Hughen, K., Björck, Svante, Johnsen, Sigfu's, Lowe, J., Newnham, R., Kromer, Bernd, Nakagawa, Takeshi, Lowe, D. J., Popp, Trevor James, Lowe, J. John, Schwande, J., Cwynar, L., Newnham, Rewi, Newnham, Rewi M., Rasmussen, S. O., Popp, Trevor, Hoek, W., Cwynar, Les C., Lowe, David J., Nakagawa, T., Litt, Thomas, Lowe, John, Hughen, Konrad A., Kromer, B., Johnsen, S., Gibbard, P., Andrews, J., Cwynar, Les, Bjorck, S.   +48 more
core   +1 more source

InGaP/GaAs/InGaAs Multijunction Flexible Photovoltaics With Chemical Robustness and Radiation Hardness for Unassisted Electrocatalysis and Space Applications

Advanced Energy Materials, EarlyView.
A flexible InGaP/GaAs/InGaAs triple‐junction platform encapsulated with ultrathin glass enables unassisted electrocatalysis and space applications by providing robust protection against chemically aggressive and radiation‐rich environments. This work establishes a unified III–V multijunction photovoltaic platform that bridges space photovoltaics and ...
Sukkyu Hong, Seungwan Woo, Hoki Son, Hyun‐Beom Shin, Eungbeom Yeon, Jeongeun Mo, Daehwan Jung, Ho Won Jang, Ho Kwan Kang, Sung‐Min Lee, Won Jun Choi   +10 more
wiley   +1 more source

Redirecting Excited‐State Proton Transfer Through Supramolecular Polymerization in Nanoconfinement

Angewandte Chemie, EarlyView.
Supramolecular confinement redirects the excited‐state proton transfer pathway of an amphoteric emitter. In water, the molecule undergoes ESPD, whereas co‐assembly with γ‐cyclodextrin forms nanotubes that template slip‐stacked emitter pairs and enable ESIMPT. Structural and photophysical characterization of the assemblies shows that the preorganization
Luis C. Pantaleone, Robert Hutchings, Bente Reus, Jacopo Martinelli, Alessia Lasorsa, Patrick C. A. van der Wel, Marc C. A. Stuart, Wesley R. Browne, Tibor Kudernac   +8 more
wiley   +2 more sources

Neutron Spectroscopy in Perpendicular Neutral Beam Injection Deuterium Plasmas Using Newly Developed Compact Neutron Emission Spectrometers [PDF]

ORCID　0000-0002-0160-0468The presence of helically trapped fast ions in helical ripples in the large helical device (LHD), resulting from a perpendicularly injected positive-ion-source-based neutral beam (P-NB)-heated plasma and/or from ion cyclotron ...
ZHONG, Guoqiang, POOLYARAT, Nopporn, KOBAYASHI, Makoto I., OSAKABE, Masaki, TAKADA, Eiji, MURAKAMI, Sadayoshi, SANGAROON, Siriyaporn, INAMI KOBAYASHI, Makoto, OGAWA, Kunihiro, SEKI, Ryohsuke, NUGA, Hideo, ISOBE, Mitsutaka, WISITSORASAK, Apiwat, LIAO, Longyong   +13 more
core   +1 more source

Aldehyde–Olefin Couplings by Photoinduced Reduction of Electron‐Deficient Olefins with Hantzsch Ester Anions

Angewandte Chemie, EarlyView.
Single‐electron transfer‐mediated reductive carbonyl–olefin couplings are valuable carbon–carbon bond forming reactions. However, limitations persist for couplings of aliphatic aldehydes with electron‐deficient olefins. Here, we report a simple, photocatalyst‐free protocol that overcomes these limitations by using a Hantzsch ester anion as a ...
Zhihang Li, Adam Noble
wiley   +2 more sources

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  

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