Results 71 to 80 of about 173,935 (289)

Mass-spectrometric study on 13C/12C carbon and 18O/16O oxygen stable isotopes distributions in grapes and wines from the Black Sea regions

BIO Web of Conferences, 2019
The present study continues the 2015–2016 research project on biological characteristics of stable isotopes fractionation in grapes taking into account the agro-climatic growth conditions of this representative of the C3-pathway of photosynthesis group ...
Kolesnov A., Zenina M., Tsimbalaev S., Tereshenko G., Torshina L., Anikina N., Gnilomedova N., Gerzhikova V., Egorov E., Guguchkina T., Prakh A., Antonenko M.   +11 more
doaj   +1 more source

Engineering Hydrogen‐Down Water Configurations for Ampere‐Level Electrochemical CO2 Reduction to Formate

Advanced Functional Materials, EarlyView.
Electrochemical CO2 reduction (ECR) to formate is a promising route for sustainable chemical production. Herein, we report the synthesis catalysed byBi‐HfO2@C. The AIMD simulations, DFT calculations, and in situ SEIRAS measurements show that the modification of HfO2 on the Bi surface steers the interfacial water to adopt a favorable hydrogen‐down (OH2↓)
Xiao‐Dong Guo, Shao‐Qing Liu, Jia‐Yi Wu, Qi‐Rui Wen, Xiaoxiao Wei, Shu‐Wen Wu, Xian‐Zhu Fu, Jing‐Li Luo   +7 more
wiley   +1 more source

The incredible lightness of being methane-fuelled: stable isotopes reveal alternative energy pathways in aquatic ecosystems and beyond

Frontiers in Ecology and Evolution, 2016
We have known about the processes of methanogenesis and methanotrophy for over 100 years, since the days of Winogradsky, yet their contributions to the carbon cycle were deemed to be of negligible importance for the majority of that period. It is only in
Jonathan eGrey
doaj   +1 more source

O, H and C isotopic systematics of Icelandic groundwater [PDF]

E3S Web of Conferences, 2019
Stable water isotopes of oxygen and hydrogen have been studied in Icelandic natural waters since 1960 for hydrological and geothermal research. All the waters are of meteoric and seawater origin.
Sveinbjörnsdóttir Arny E., Stefánsson Andri, Heinemeier Jan   +2 more
doaj   +1 more source

Increased C3 productivity in Midwestern lawns since 1982 revealed by carbon isotopes in Amanita thiersii [PDF]

, 2017
How climate and rising carbon dioxide concentrations (pCO2) have influenced competition between C3 and C4 plants over the last 50 years is a critical uncertainty in climate change research.
Craine, Joseph M., Hobbie, Erik A., Linder, Ernst, Pringle, Anne, Schubert, Brian A.   +4 more
core   +2 more sources

Engineered Protein‐Based Ionic Conductors for Sustainable Energy Storage Applications

Advanced Materials, EarlyView.
Rational incorporation of charged residues into an engineered, self‐assembling protein scaffold yields solid‐state protein films with outstanding ionic conductivity. Salt‐doping further enhances conductivity, an effect amplified in the engineered variants. These properties enable the material integration into an efficient supercapacitor.
Juan David Cortés‐Ossa, Paolo Blesio, Marcial Fernandez‐Castro, Lisa Almonte, Maxence Fernandez, Mantas Liutkus, Perumal Pandurangan, Carlos Sabater, Aitor Villaverde, Manuel Melle‐Franco, Nurit Ashkenasy, Felipe Jiménez‐Ángeles, M. Carmen Morant‐Miñana, M. Reyes Calvo, Aitziber L. Cortajarena   +14 more
wiley   +1 more source

The transition zone as a host for recycled volatiles: Evidence from nitrogen and carbon isotopes in ultra-deep diamonds from Monastery and Jagersfontein (South Africa) [PDF]

, 2017
Sublithospheric (ultra-deep) diamonds provide a unique window into the deepest parts of Earth's mantle, which otherwise remain inaccessible. Here, we report the first combined C- and N-isotopic data for diamonds from the Monastery and Jagersfontein ...
Gurney, J.J., Harris, J.W., Le Pioufle, A., Palot, M., Pearson, D.G., Stachel, T., Stern, R.A.   +6 more
core   +1 more source

Flexoelectrically Induced Polar Topology in Twisted SrTiO3 Membranes

Advanced Materials, EarlyView.
Twisted SrTiO3 bilayers host polar vortices of flexoelectric origin, revealed through combined experiment and theory. By reconstructing polarization from the toroidal moment of strain gradients, the work establishes a 3D chiral state with broken inversion and mirror symmetries.
Isabel Tenreiro, Hugo Aramberri, Víctor Rouco, Gabriel Sánchez‐Santolino, Mariona Cabero, Fernando Gallego, David Sánchez‐Manzano, José M. González‐Calbet, Federico Mompeán, Mar García‐Hernández, Alberto Rivera‐Calzada, Jorge Íñiguez‐González, Carlos León, Jacobo Santamaría   +13 more
wiley   +1 more source

Contribution of anadromous fish to the diet of European catfish in a large river system [PDF]

, 2009
Many anadromous fish species, when migrating from the sea to spawn in fresh waters, can potentially be a valuable prey for larger predatory fish, thereby efficiently linking these two ecosystems. Here, we assess the contribution of anadromous fish to the
AE Kohler, Aurélia Martino, BJ Peterson, C Harrod, CE Adams, DL Phillips, Dorothée Kopp, DR Rubenstein, Frédéric Santoul, G Lassalle, GC Garman, ID McCarthy, J Carol, J Syväranta, J Syväranta, Jari Syväranta, JAS Zuanon, Julien Cucherousset, K Wysujack, LA Deegan, M Kiljunen, MJ DeNiro, PE Drevnick, RE Bilby, RH Hesslein, RR Doucett, Régis Céréghino, S Bearhop, SE MacAvoy, SE MacAvoy, SE MacAvoy, TD Jardine   +31 more
core   +5 more sources

Biogeochemistry of Stable Carbon Isotopes [PDF]

, 1969
In 1947, in his classical paper on the thermodynamic properties of isotopic substances, H. C. Urey [1] laid the foundation of modern isotope geochemistry. At the same time, A. O. Nier [2] designed a new mass spectrometer which allowed the measurement of small differences in isotope abundance ratios. A modification in the Nier-type mass spectrometer and
openaire   +1 more source