Results 31 to 40 of about 658,769 (293)

Possible pairing mechanism switching driven by structural symmetry breaking in BiS2-based layered superconductors

Scientific Reports, 2021
Investigation of isotope effects on superconducting transition temperature (T c) is one of the useful methods to examine whether electron–phonon interaction is essential for pairing mechanisms. The layered BiCh2-based (Ch: S, Se) superconductor family is
Aichi Yamashita, Hidetomo Usui, Kazuhisa Hoshi, Yosuke Goto, Kazuhiko Kuroki, Yoshikazu Mizuguchi   +5 more
doaj   +1 more source

Chemostratigraphy of Neoproterozoic carbonates: implications for 'blind dating' [PDF]

, 2001
The delta C-13(carb) and Sr-87/Sr-86 secular variations in Neoproteozoic seawater have been used for the purpose of 'isotope stratigraphy' but there are a number of problems that can preclude its routine use.
Gorokhov, I.M., Fallick, A.E., Anthony E. Fallick, Fallick, A, Igor M. Gorokhov, Kuznetsov, A.B., Victor A. Melezhik, Melezhik, V.A., Anton B. Kuznetsov   +8 more
core   +1 more source

C- and Sr-isotope stratigraphy of the São Caetano complex, Northeastern Brazil: a contribution to the study of the Meso-Neoproterozoic seawater geochemistry

Anais da Academia Brasileira de Ciências, 2005
C-isotope and 87Sr/86Sr values for five carbonate successions from the São Caetano Complex, northeastern Brazil, were used to constrain their depositional age and to determine large variations in the C- and Sr-isotopic composition of seawater under the ...
Juan C. Silva, Alcides N. Sial, Valderez P. Ferreira, Márcio M. Pimentel   +3 more
doaj   +1 more source

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

Isotope-shift spectroscopy of the ^{1}S_{0}→^{3}P_{1} and ^{1}S_{0}→^{3}P_{0} transitions in strontium

Physical Review Research, 2019
Isotope-shift spectroscopy with narrow optical transitions provides a benchmark for atomic structure calculations and has also been proposed as a way to constrain theories predicting physics beyond the standard model.
Hirokazu Miyake, Neal C. Pisenti, Peter K. Elgee, Ananya Sitaram, Gretchen K. Campbell   +4 more
doaj   +1 more source

Geochemistry, S and Sr isotopes and origin of the Shahneshin barite deposit, NW Kurdistan Province, Iran

Journal of Economic Geology, 2021
Introduction The lenticular Shahneshin barite deposit (N: 35°39'36'' and E: 46°36'11'') is located 80 km northeast of Marivan, Kurdistan Province; north Sanandaj-Sirjan Zone (Stöcklin, 1968).
Hadi Amin-Rasouli, Mehdi Moradi, Zahra Sadat Baleshabadi   +2 more
doaj   +1 more source

C, O, and Sr isotopic variations in Neoproterozoic-Cambrian carbonate rocks from Sete Lagoas Formation (Bambuí Group), in the Southern São Francisco Basin, Brazil

Brazilian Journal of Geology, 2017
: High-resolution chemostratigraphic data of carbonates from the Sete Lagoas Formation (Bambuí Group) show large variations on the C, O, and Sr isotope compositions.
Cristian Guacaneme, Marly Babinski, Gustavo Macedo de Paula-Santos, Antonio Carlos Pedrosa-Soares   +3 more
doaj   +1 more source

Sr ISOTOPES AND ROMAGNA WINES: AN OPPORTUNITY FOR BETTER TRADING?

EQA, 2011
La composition isotopique du Sr a été mesurée dans 11 vins de Romagne, parce que la détermination de ce paramètre peut être utile à tracer l’origine des produits pour une meilleure commercialisation. Les 87Sr mesurés se sont avérés homogènes au sein d'une faible amplitude de valeurs (-0.07 et +0.33 o/oo), en accord avec la provenance des raisins d’une ...
CASTORINA, Francesca, Umberto Masi
openaire   +3 more sources

Research Progress on the Application of Strontium Isotope Analysis Techniques in Geology: A Review

Yankuang ceshi
Strontium (Sr) isotopes have unique geochemical properties, such as time dependence and environmental sensitivity. With the development of testing technology and theoretical systems, using Sr isotopes has become a key technique in geoscience research ...
Wuhui JIA, Kai LIU, Chenghua YU, Wei ZHU, Yuefei DENG   +4 more
doaj   +1 more source

Bioavailable soil and rock strontium isotope data from Israel [PDF]

Earth System Science Data, 2020
Strontium isotope ratios (87Sr ∕ 86Sr) of biogenic material such as bones and teeth reflect the local sources of strontium ingested as food and drink during their formation. This has led to the use of strontium isotope ratios as a geochemical tracer in a
I. Moffat, I. Moffat, R. Rudd, M. Willmes, M. Willmes, G. Mortimer, L. Kinsley, L. McMorrow, R. Armstrong, M. Aubert, M. Aubert, M. Aubert, R. Grün, R. Grün   +13 more
doaj   +1 more source