Results 41 to 50 of about 70,014 (336)

A Molecular Line Survey of the Highly Evolved Carbon Star CIT 6 [PDF]

, 2008
We present a spectral line survey of the C-rich envelope CIT 6 in the 2mm and 1.3mm bands carried out with the Arizona Radio Observatory (ARO) 12m telescope and the Heinrich Hertz Submillimeter Telescope (SMT). The observations cover the frequency ranges
Agúndez, Alksnis, Bachiller, Balser, Bieging, Boothroyd, Bujarrabal, Busso, Cernicharo, Charbonnel, Charbonnel, Dinh-V-Trung, , Frost, Groenewegen, He, Henkel, Herpin, Kahane, Keene, Lindqvist, Lodders, Lucas, Monnier, Nejad, Nummelin, Olofsson, Pardo, Sackmann, Schmidt, Schöier, Sopka, Sun Kwok, Willacy, Yong Zhang   +33 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

The Re-Os Isotopic System: Geochemistry and Methodology at the Geochronological Research Center (CPGeo) of the University of São Paulo, Brazil [PDF]

Geologia USP. Série Científica, 2007
The Re-Os isotopic system is an important tool for the study of mantle-crust processes, geochronology and the tracingof source reservoirs for metal deposition.
Ciro Teixeira Correia, Jason Donald Kirk, Louise Ruth Frick, Liliane Aparecida Petronilho, Colombo Celso Gaeta Tassinari, Kei Sato   +5 more
doaj  

Realisation and preliminary validation of a dilution device for the generation of CO2 gas mixtures

Measurement: Sensors, 2021
The present paper describes the activity carried out at Istituto Nazionale di Ricerca Metrologica (INRIM) within the EMPIR Joint Research Project 16ENV06 “Metrology for Stable Isotope Reference Standards - SIRS”, for the realisation of a dilution device ...
Francesca Rolle, Michela Sega, Francesca Romana Pennecchi, Pier Giorgio Spazzini, Stefano Pavarelli, Marco Santiano   +5 more
doaj   +1 more source

Solution to the isotope dilution challenge [PDF]

Analytical and Bioanalytical Chemistry, 2015
Over the years, isotope dilution mass spectrometry (IDMS) has witnessed many reformulations. One of the earliest expressions for this quantitation model was given by the single isotope dilution (IDMS). In IDMS, the mass fraction of an analyte A is obtained from mass spectrometric analysis of a mixture (blend) of sample and an isotopically-enriched form
openaire   +3 more sources

Nitrogen isotope analysis of ammonium and glycine [PDF]

, 2005
Stable isotope techniques can be used as a tool in nitrogen cycling studies of different ecosystems. The studies are based on measurement of the heavy (15N)- to- light (14N) isotopic ratios of nitrogen in different biospheric pools.
Norlin, Elin
core  

A matrix isolation and computational study of molecular palladium fluorides : does PdF₆ exist? [PDF]

, 2016
Palladium atoms generated by thermal evaporation and laser ablation were reacted with and trapped in F₂ /Ar, F₂ /Ne, and neat F₂ matrices. The products were characterized by electronic absorption and infrared spectroscopy, together with relativistic ...
Andrews, Lester, Bridgeman, Adam J., Brosi, Felix, Nguyen, Timothy, Riedel, Sebastian, Wang, Xuefeng, Wilson, Antony V., Young, Nigel A.   +7 more
core   +1 more source

A Tracer Diffusion Study of Diverse Photo‐Ionic Phenomena in Strontium Titanate

Advanced Functional Materials, EarlyView.
Two strong interfacial photo‐ionic effects are demonstrated for the model system SrTiO3 through the application of isotope exchange experiments: UV illumination is found to enhance the oxygen surface exchange coefficient by several orders of magnitude and to depress the surface space‐charge potential substantially.
David M. Schwenkel, Timon F. Kielgas, George F. Harrington, Roger A. De Souza   +3 more
wiley   +1 more source

Cinética do fósforo em tecidos de suínos em crescimento Phosphorus kinetic in tissue of swine in the growing phase

Revista Brasileira de Zootecnia, 1999
Esta pesquisa foi realizada para estudar a cinética do fósforo (P) em tecidos de suínos em crescimento, alimentados com rações contendo níveis crescentes de P total (0,30; 0,40; 0,51; 0,65; e 0,73%), por meio do uso do 32P como traçador.
João Batista Lopes, Dorinha Miriam Silber S. Vitti, Agustinho Valente de Figueirêdo, Hacy Pinto Barbosa   +3 more
doaj   +1 more source

Toward Scalable Solutions for Silver‐Based Gas Diffusion Electrode Fabrication for the Electrochemical Conversion of CO2 – A Perspective

Advanced Functional Materials, EarlyView.
In this study, the preparation techniques for silver‐based gas diffusion electrodes used for the electrochemical reduction of carbon dioxide (eCO2R) are systematically reviewed and compared with respect to their scalability. In addition, physics‐based and data‐driven modeling approaches are discussed, and a perspective is given on how modeling can aid ...
Simon Emken, K. Ashoke Raman, Alexander Bauer, Violeta Karyofylli, Eva Jodat, André Karl, Rüdiger‐A. Eichel   +6 more
wiley   +1 more source