Results 131 to 140 of about 14,752 (295)

Dual Activation of H2 and CO2 by a Pincer‐Type Ni–Zn Heterobimetallic Complex

Angewandte Chemie, EarlyView.
A bimetallic Ni−Zn complex performs sequential activations of H2 (1 equiv) and CO2 (2 equiv). This bimetallic cooperativity is attributed to the weak Lewis acidic nature of Zn(II), which promotes fluxional ligand binding. Namely, an X‐type ligand at Ni, where X is hydride or formate, toggles between two different binding modes: bridging Zn(μ‐X)Ni and ...
Krishnendu Dey, Matthias Borowski, Gregor Schnakenburg, Connie C. Lu   +3 more
wiley   +2 more sources

Stable isotopes in diatom silica [PDF]

, 2010
Diatom silica is a form of biogenic opal (SiO2.nH2O, Figure 1) containing oxygen, silicon, carbon and nitrogen isotopes that can be used in lacustrine and marine paleoenvironmental studies.
Leng, Melanie J., Swann, George E.A.
core  

Controlling Exsolution Dynamics in High‐Entropy Oxides for Highly Active and Selective Acetylene Semi‐Hydrogenation

Angewandte Chemie, EarlyView.
Li+‐induced lattice distortion, valence variation, and local charge redistribution in a rock salt‐structured high‐entropy oxide enable controlled metal exsolution, altering the Cu–Ni–Co exsolution sequence and delivering a surface Cu0‐enriched catalyst with exceptional activity and ethylene selectivity for acetylene semi‐hydrogenation.
Hailing Yu, Caiqi Wang, Kevin M. Siniard, Qingju Wang, Yuanpeng Zhang, J. Anibal Boscoboinik, Xiao Tong, Eliseo Perez Gomez, Shuai Yuan, Arun S. Asundi, Oliver Mueller, Murillo Longo Martins, Yongqiang Cheng, Michael Richard Koehler, De‐en Jiang, Zili Wu, Zhenzhen Yang, Sheng Dai   +17 more
wiley   +2 more sources

Isotopic Data on Diet and Mobility from Pictish and Viking Age Orkney

Journal of Open Archaeology Data
Changes in diet and mobility isotopes from the Late Iron Age or Pre-Viking phase (PVP, AD 550–790) through the Viking Age (VA, AD 790–1050) and Late Norse phase (LNP, AD 1050–1300) can be used to suggest nuanced socioeconomic and political change ...
Alexandra Johnson, Christophe Snoeck, Rick Schulting, Philippe Claeys, Nadine Mattielli, Gail Drinkall   +5 more
doaj   +1 more source

Iron absorption in raw and cooked bananas: a field study using stable isotopes in women

, 2015
Background: Banana is a staple food in many regions with high iron deficiency and may be a potential vehicle for iron fortification. However, iron absorption from bananas is not known.\ud \ud Objective: The objective of this study was to evaluate total ...
Romano, Diana, Rosado, Jorge, Garcia, Olga, De Moura, Fabiana, Abrams, Steve, Dale, James, Martinez, Mara, Camacho, Mariela, Khanna, Harjeet   +8 more
core   +1 more source

Iron Isotopes Constrain the Metal Sources of Skarn Deposits: A Case Study from the Han-Xing Fe Deposit, China

, 2020
Magmatic fluids and leaching of rocks are regarded as the two sources of magmatic hydrothermal deposits, but their relative contributions to the metals in the deposits are still unclear.
Hongfu Zhang, Chunming Han, Bin Zhu, M. Santosh, Pengfei Zhang, Yongsheng He, Benxun Su   +6 more
core   +1 more source

Unravelling atmospheric photolysis and ocean redox chemistry from Paleoarchean pyrite: a multiple sulfur and iron stable isotope study

, 2015
This thesis brought together four individual studies on the geochemistry of three recently obtained drill cores from the Barberton Greenstone Belt, South Africa.
Petrology, Galić, A., NWO-NSO: Tracing Early Planetary Life using combined Fe and S stable isotopes   +2 more
core  

Ferrokinetic studies with stable isotopes as tracers

, 1987
A methodology for ferrokinetic studies based on the administration of iron stable isotopes was developed. Fractional plasma clearance and intestinal iron absorption in rabbits were determined using the double tracer technique.
L. Pirola, E. Werner, P. Roth, Werner, E., Molha, N., M. C. Cantone, Pirolla, L., C. Hansen, M.C. Cantone, Ch. Hansen, Hansen, Ch., Cantoue, M.C., N. Molho, Roth, P.   +13 more
core   +1 more source

Iron deficiency up-regulates iron absorption from ferrous sulphate but not ferric pyrophosphate and consequently food fortification with ferrous sulphate has relatively greater efficacy in iron-deficient individuals

, 2010
Fe absorption from water-soluble forms of Fe is inversely proportional to Fe status in humans. Whether this is true for poorly soluble Fe compounds is uncertain.
Egli, I., Zimmermann, Michael B., Hurrell, R.F., Zeder, C., Michael B. Zimmermann, Ralf Biebinger, Richard F. Hurrell, Biebinger, Ralf, Zeder, Christophe, Ines Egli, Christophe Zeder, Egli, Ines, Hurrell, Richard F., Zimmermann, M.B., Biebinger, R.   +14 more
core   +1 more source

Eemian iron isotopes from Black Sea sediment cores taken at station 22 during Meteor cruise M72/5

, 2019
Eemian iron isotopes from Black Sea sediment cores taken at station 22 during Meteor cruise M72/
Wegwerth, Antje, Antje Wegwerth (6976073)   +1 more
core   +1 more source