Results 51 to 60 of about 1,165,122 (191)

Quantification of methane oxidation in the rice rhizosphere using 13C-labelled methane [PDF]

, 1994
In this paper isotope ratio mass spectrometry is used to determine the methane (CH4) oxidation fraction in the rhizosphere of intact rice plant-soil systems.
Harren, F.J.M., van Bodegom, P.M., Bodegom, P.M. van,, Groot, T.T., Meijer, H.A.J., Groot, T.T, Groot, T.T.,, Meijer, H.A.J.,, Harren, F.J.M.,, Meijer, H.A.J.; id_orcid, Bodegom, P.M. Van, Tümpel, C.L.   +11 more
core   +3 more sources

An isotope study of the felsic units of the Bushveld Large Igneous Province, South Africa [PDF]

, 2010
Includes abstract.An O, H, Sr and Nd isotope study was carried out on the ~ 2059 Ma Bushveld granites and granophyres.
Fourie, Duane
core   +1 more source

Stable isotope values in modern bryozoan carbonate from New Zealand and implications for paleoenvironmental interpretation [PDF]

, 2004
Bryozoan carbonate contains useful geochemical evidence of temperate shelf paleoenvironments. Stable isotope values were determined for 103 modern marine bryozoan skeletons representing 30 species from New Zealand. δ18O values range from -1.4 to 2.8 VPDB,
Nelson, Campbell S., Campbell S. Nelson, Marcus M. Key, Smith, Abigail M., Key, Marcus M., Patterson, William P., Abigail M. Smith, William P. Patterson   +7 more
core   +1 more source

The Precambrian marine carbonate isotope database: version 1.1. [PDF]

, 2002
We present a compilation of strontium, carbon, and oxygen isotope compositions of roughly 10,000 marine carbonate rocks of Archean - Ordovician age (3800 Ma – 450 Ma).
Shields, GA, Veizer, J, Ján Veizer, Graham Shields, Shields, Graham, Veizer, Ján   +5 more
core   +1 more source

Laser isotope enrichment of 168Er

Scientific Reports
This present study investigates a three-step laser isotope separation method for the enrichment of 168Er isotope using 631.052 nm – 586.912 nm – 566.003 nm three-step photoionization scheme.
M. V. Suryanarayana
doaj   +1 more source

Laser isotope separation

Nature, 1979
It is about 10 years since new methods of isotope separation by means of laser radiation were first proposed. In the past five years a lot of effort has been put into elaborating and realising these techniques. Now we are at the threshold of demonstrating the first pilot set-ups of laser isotope separation (LIS).
openaire   +2 more sources

Tell Sabi Abyad, Syria: An Interpretation of Stable Isotope Values of Faunal Bone Collagen [PDF]

, 2012
At Tell Sabi Abyad, Syria, radiocarbon dating previously provided a robust chronology for the 7th–early 6th millennium BC, the Late Neolithic. The continuous inhabitation spans the 8.2 ka climate event.
Buitenhuis, H., Kaneda, A.,, Akkermans, P.M.M.G.,, Nieuwenhuyse, O.,, Kaneda, A., Nieuwenhuyse, O., Buitenhuis, H.,, van der Plicht, J., Plicht, J. van der,, Russell, A., Russell, A.,, Akkermans, P. M. M. G.   +11 more
core   +1 more source

Production and separation of 163Ho for nuclear physics experiments. [PDF]

PLoS ONE, 2018
This paper describes the production and chemical separation of the 163Ho isotope that will be used in several nuclear physics experiments aiming at measuring the neutrino mass as well as the neutron cross section of the 163Ho isotope.
S Heinitz, N Kivel, D Schumann, U Köster, M Balata, M Biasotti, V Ceriale, M De Gerone, M Faverzani, E Ferri, G Gallucci, F Gatti, A Giachero, S Nisi, A Nucciotti, A Orlando, G Pessina, A Puiu, S Ragazzi   +18 more
doaj   +1 more source

Temperature dependence of hydrogen isotope effect in LaNi5-H(D) system

Nuclear Analysis, 2023
To study inverse effect of hydrogen isotopes in LaNi5 for hydrogen isotope separation at ambient temperature, temperature dependence of hydrogen isotope effect in LaNi5－H(D) system was investigated in the temperature range -70 °C to 3 °C.
Weiwei Wang, Hairong Li, Yiwu Mao, Lidong Xia, Weiguang Zhang, Xiaosong Zhou, Xinggui Long   +6 more
doaj   +1 more source

Mathematical model of nonstationary hydraulic processes in gas centrifuge cascade for separation of multicomponent isotope mixtures

MATEC Web of Conferences, 2017
The article presents results of development of a mathematical model of nonstationary hydraulic processes in gas centrifuge cascade for separation of multicomponent isotope mixtures.
Orlov Alexey, Ushakov Anton, Sovach Victor   +2 more
doaj   +1 more source