Results 21 to 30 of about 426,199 (298)
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. +11 more
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Shui kexue jinzhan, 2022 In order to improve the calculation accuracy of flow exchange between groundwater and surface water, a method that integrates the hydraulic connection and hydraulic head difference between groundwater and surface water, water temperature, Radon-222 and ...
Longcang SHU +6 more
doaj +1 more source
The Isotopes of Americium [PDF]
Physical Review, 1950 Three new americium activities (Am{sup 238}?, Am{sup 243}, and Am{sup 244?}, the latter two formed by n,{gamma} reactions) are described and some additional information is given on previously reported americium isotopes.
Street, K, Jr., Ghiorso, A, Seaborg, G T
openaire +7 more sources
Intensive rainfall recharges tropical groundwaters
Environmental Research Letters, 2015 Dependence upon groundwater to meet rising agricultural and domestic water needs is expected to increase substantially across the tropics where, by 2050, over half of the world’s population is projected to live.
Scott Jasechko, Richard G Taylor
doaj +1 more source
Homomolecular and Isotopic Exchange Reactions by Catalyst
Journal of Isotopes, 2016 It is widely used in the light-isotopes enrichment by distillation, such as H2, O2, N2, CO, etc. It can not get high abundance of isotopes in the late stage of enrichment for these two-atom include two isotopes, and it needs to add a reaction conversion ...
LONG Lei, LI Hu-lin, ZHOU Jian-yue
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The First 10 Million Years of Rear‐Arc Magmas Following Backarc Basin Formation Behind the Izu Arc
Geochemistry, Geophysics, Geosystems, 2020 IODP Site U1437 is located in the Izu rear‐arc region, approximately 330 km west of the Izu‐Bonin trench axis. The oldest four units (Units IV through Unit VII) include volcaniclastic sediment and in situ hyaloclastites.
T. Miyazaki +10 more
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Modeling the signature of sulfur mass-independent fractionation produced in the Archean atmosphere [PDF]
, 2014 Minor sulfur isotope anomalies indicate the absence of O2 from the Archean atmosphere. A rich dataset showing large variations in magnitude and sign of Δ33S and Δ36S, preserved in both sulfates and sulfides, suggests that further constraints on Archean ...
Claire, Mark +10 more
core +1 more source
Journal of Groundwater Science and Engineering, 2021 Shale gas exploration and development carry the risk of causing groundwater contamination and enhancing the greenhouse effect through methane leakage. Identifying the source of abnormal methane in groundwater of shale gas development areas is becoming a ...
Zhao-xian Zheng +2 more
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Stable isotope analysis provides new information on winter habitat use of declining avian migrants that is relevant to their conservation [PDF]
, 2012 Winter habitat use and the magnitude of migratory connectivity are important parameters when assessing drivers of the marked declines in avian migrants. Such information is unavailable for most species.
Newton, J. +11 more
core +2 more sources
Small differences in root distributions allow resource niche partitioning
Ecology and Evolution, 2020 Deep roots have long been thought to allow trees to coexist with shallow‐rooted grasses. However, data demonstrating how root distributions affect water uptake and niche partitioning are uncommon.
Andrew Kulmatiski +3 more
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