Results 31 to 40 of about 912,361 (332)

Geochemical characteristics of hydrogen, oxygen, carbon isotopes and REE of cenozoic dolomites in Well Xike 1, Xisha Islands, South China sea and the significance for dolomitization in island-reef areas

Frontiers in Earth Science, 2023
Due to the special tectonic background and complex geological evolution characteristics of the South China Sea, reef dolomite reservoirs (sush as Well Xike 1) are widely developed.
Xiaoyu Li, Xiaoyu Li, Zhiqiang Shi, Lu Han, Xiaolong Hu   +4 more
doaj   +1 more source

Iron isotope effect on the superconducting transition temperature and the crystal structure of FeSe_1-x [PDF]

, 2010
The Fe isotope effect (Fe-IE) on the transition temperature T_c and the crystal structure was studied in the Fe chalcogenide superconductor FeSe_1-x by means of magnetization and neutron powder diffraction (NPD).
, Bussmann-Holder A Simon A Keller H Bishop A R, E Pomjakushina, H Keller, K Conder, Khasanov R, M Bendele, Margadonna S, Mizuguchi Y, R Khasanov, V Pomjakushin   +10 more
core   +1 more source

Chlorine and Bromine Isotope Fractionation of Halogenated Organic Pollutants on Gas Chromatography Columns

, 2017
Compound-specific chlorine/bromine isotope analysis (CSIA-Cl/Br) has become a useful approach for degradation pathway investigation and source appointment of halogenated organic pollutants (HOPs).
Fan, Yujuan, Liu, Jun, Peng, Xianzhi, Tan, Jianhua, Tang, Caiming, Xiong, Songsong   +5 more
core   +1 more source

High-precision measurements of seawater Pb isotope compositions by double spike thermal ionization mass spectrometry [PDF]

, 2014
A new method for the determination of seawater Pb isotope compositions and concentrations was developed, which combines and optimizes previously published protocols for the separation and isotopic analysis of this element.
Bridgestock, L, Paul, M, Rehkämper, M, van DeFlierdt, T, Weiss, D   +4 more
core   +2 more sources

Production of 161Tb Radionuclide

Journal of Isotopes
Targeted radionuclide therapy (TRT)，the use of radiopharmaceuticals to target and irradiate tumour cells，has become an important method for cancer treatment.
Ruyu WANG, Yanjun LI, Songbai ZENG, Wenming HE, Sifan LEI, Yong HUANG   +5 more
doaj   +1 more source

Freezing and chemical preservatives alter the stable isotope values of carbon and nitrogen of the Asiatic clam (Corbicula fluminea) [PDF]

, 2011
We tested the impacts of most common sample preservation methods used for aquatic sample materials on the stable isotope ratios of carbon and nitrogen in clams, a typical baseline indicator organism for many aquatic food web studies utilising stable ...
Aurélia Martino, B Fry, B Kelly, BJ Peterson, CJ Sweeting, DM Post, Dorothée Kopp, Frédéric Santoul, H Feuchtmayr, HC Sarakinos, J Dannheim, J Syväranta, J Syväranta, Jari Syväranta, KL Bosley, LM Barrow, M Ventura, MM Mullin, MS Edwards, NO Ogawa, Régis Céréghino, S Carabel, S Kaehler   +22 more
core   +4 more sources

An effective method to extract and purify radiolaria from tropical marine sediments

Frontiers in Marine Science, 2023
Radiolaria are the primary contributors to biogenic opal in the tropical ocean, and their isotope compositions are potentially useful tool for reconstructing the silicon cycle in mid-depth waters.
Qiang Zhang, Qiang Zhang, George E. A. Swann   +2 more
doaj   +1 more source

Uniform Silicon Isotope Ratios Across the Milky Way Galaxy

, 2017
We report the relative abundances of the three stable isotopes of silicon, $^{28}$Si, $^{29}$Si and $^{30}$Si, across the Galaxy using the $v = 0, J = 1 \to 0$ transition of silicon monoxide. The chosen sources represent a range in Galactocentric radii ($
Monson, Nathaniel N., Morris, Mark R., Young, Edward D.   +2 more
core   +1 more source

Contrasting Centennial‐Scale Climate Variability in High Mountain Asia Revealed by a Tree‐Ring Oxygen Isotope Record From Lahaul‐Spiti

Geophysical Research Letters, 2020
Glacier response analyses in High Mountain Asia have revealed that the glaciers from the Karakoram region were in balance or thickening while most from the other regions were thinning, the “Karakoram anomaly.” It is, however, not clear whether this ...
Shreyas Managave, P. Shimla, Ram R. Yadav, R. Ramesh, S. Balakrishnan   +4 more
doaj   +1 more source

An experimental, behavioral, and chemical analysis of food limitations in mutualistic Crematogaster ant symbionts inhabiting Macaranga host plants

Ecology and Evolution, 2023
Obligate mutualistic plant–ants are often constrained by their plant partner's capacity to provide resources. However, despite this limitation, some ant partners actively reject potential prey items and instead drop them from the plant rather than ...
Mickal Y. I. Houadria, Giulio Barone, Tom M. Fayle, Thomas Schmitt, Petr Konik, Heike Feldhaar   +5 more
doaj   +1 more source