Results 121 to 130 of about 165,943,902 (286)

Niche occupancy of Jamaican bat caves: Diversity increases isotopic niche packing

Journal of Animal Ecology, EarlyView.
Tropical bat caves are home to hundreds of thousands of bats of multiple species. In Jamaica, we found that isotopic niche packing is the likely mechanism of coexistence at more diverse sites. Abstract There are over 1000 documented caves across Jamaica, many of them used by diverse communities of bats.
Phillip J. Oelbaum, Ronald P. Hall, Damion L. Whyte, Nicholas A. Lee, Ronald S. Stewart, Jerrica M. Jamison, Kenneth C. Welch Jr.   +6 more
wiley   +1 more source

Atomic Energy Commission Report AECU-4616

, 1959
A sequential method is described for the determination of strontium- 89, strontium-90, barium-140, and tungsten185 in rain water samples. A comparison is made of data on radioactivity in individual rain samples and in monthly pot samples.

core  

Strontium isotopes in ostracods of Black Sea sediment cores covering MIS 6 (184-130 ka BP)

, 2019
Strontium isotopes in ostracods of Black Sea sediment cores covering MIS 6 (184-130 ka ...
Wegwerth, Antje, Antje Wegwerth (6976073)   +1 more
core   +1 more source

Bridging the Late Antique Gap in Northwest Arabia: New Archaeological Evidence on the Occupation of Wādī al‐Qurā (al‐ʿUlā [AlUla], Saudi Arabia) Between the Third and Seventh Centuries CE

Arabian Archaeology and Epigraphy, EarlyView.
ABSTRACT In 2019, the Dadan Archaeological Project (CNRS/RCU/AFALULA) identified a Late Antique village 1 km south of ancient Dadan in the al‐ʿUlā valley (northwest Saudi Arabia). Three excavation seasons at this site (2021–2023) have uncovered a massive building constructed in the late third or early fourth cent.
Jérôme Rohmer, Abdulrahman Alsuhaibani, Charlène Bouchaud, Elora Chambraud, Vladimir Dabrowski, Hatem Djerbi, Fabien Lesguer, Hervé Monchot, Paul Picavet, Louise Purdue, Bertrand Riba, Shadi Shabo   +11 more
wiley   +1 more source

(Table 3) Strontium and neodynium isotopes at DSDP Holes 81-553 and 81-555

, 1984
(Table 3) Strontium and neodynium isotopes at DSDP Holes 81-553 and 81 ...
RM Macintyre (7995350), Macintyre, RM, Hamilton, P J, P J Hamilton (7914623)   +3 more
core   +1 more source

Investigating relationships among strontium, barium, and seasonality in wild baboons

Archaeometry, EarlyView.
Abstract Geochemical profiles of Australopithecus africanus and baboon teeth show fluctuating trace elements, possibly reflecting seasonal diets. Here we use laser ablation–inductively coupled plasma–mass spectrometric measurements of calcium‐normalized strontium and barium ratios (Sr/Ca and Ba/Ca) and ion microprobe analyses of oxygen isotopes (δ18O ...
Maya Bharatiya, Christine Austin, Manish Arora, Janaína N. Ávila, Esme K. Beamish, Wendy Dirks, Daniel R. Green, Nicole D. Leonard, W. Scott McGraw, Larissa Swedell, Ian S. Williams, Jian‐xin Zhao, Tanya M. Smith   +12 more
wiley   +1 more source

Optical pumping of 5s4d^{1}D_{2} strontium atoms for laser cooling and imaging

Physical Review Research
We present a faster repumping scheme for strontium magneto-optical traps operating on the broad 5s^{2}^{1}S_{0}−5s5p^{1}P_{1} laser cooling transition. Contrary to existing repumping schemes, we directly address lost atoms that spontaneously decayed to ...
Jens Samland, Shayne Bennetts, Chun-Chia Chen (陳俊嘉), Rodrigo González Escudero, Florian Schreck, Benjamin Pasquiou   +5 more
doaj   +1 more source

Trace Element Patterns in Juvenile Wild Chimpanzee Dentitions

Archaeometry, EarlyView.
ABSTRACT Trace elements are used to infer mammalian early‐life diets, environmental toxins, dispersal patterns, stress histories, and weaning ages. Here, we employ laser ablation‐inductively coupled plasma‐mass spectrometry (LA‐ICP‐MS) to reveal elemental patterns in our closest living relatives, chimpanzees.
Tanya M. Smith, Manish Arora, Maya Bharatiya, Nicole Leonard, Jian‐xin Zhao, Christine Austin   +5 more
wiley   +1 more source

STRONTIUM ISOTOPES TEST LONG-TERM ZONAL ISOLATION OF INJECTED AND MARCELLUS FORMATION WATER AFTER HYDRAULIC FRACTURING [PDF]

, 2014
The rapidly expanding use of high volume hydraulic fracture stimulation during development of unconventional gas reservoirs such as the Marcellus Shale in northeastern North America has lead to concerns about potential migration or displacement of high ...
Kolesar, Courtney
core  

Strontium-90 concentration in waters of the eastern Carribbean Sea

, 1977
Vertical structure of the strontium-90 concentration field and its relation to hydrology of waters are described on the basis of investigations in the Caribbean Sea during Cruises 6 and 7 of R/V Akademik Vernadsky (1972-1973).
Eremeev, Valery N, T M Ivanova (7963673), Zemlyanoy, A D, Batrakov, G F, G F Batrakov (7963670), Valery N Eremeev (6973877), Ivanova, T M, A D Zemlyanoy (7962665)   +7 more
core   +1 more source