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  1. 441

    Environment of European Last Mammoths: Reconstructing the Landcover of the Eastern Baltic Area at the Pleistocene/Holocene Transition by Ivan Krivokorin, Anneli Poska, Jüri Vassiljev, Siim Veski, Leeli Amon

    Published 2025-01-01
    “…A comparison between the isotopic values of nitrogen (δ<sup>15</sup>N) and carbon (δ<sup>13</sup>C) obtained from mammoths’ molars from 14.3 and 11.3 to 43.5 and 39.1 ka cal BP showed that mammoths experienced a decline in the nutritional value of their diet, resulting in their demise in the Eastern Baltic.…”
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  2. 442

    The Joint Research Centre’s Expertise in Nuclear Safeguards Sample Analysis by Hernández Ana María Sánchez, Buda Razvan, Casteleyn Karin, Commin Lorelei, D’Amati Francesco, Horta Joan, Le Terrier Arnaud, Mühleisen Artur, Stohr Sarah, Schorlé Hélène, Toma Magdalena, Zuñiga Martin Vargas, Wojnowski Denis, Zsigrai Jozsef, Mayer Klaus

    Published 2025-01-01
    “…The Analytical Service at JRC Karlsruhe is dedicated to maintaining the highest standards of quality, accuracy, and traceability in its analytical measurements, with a focus on uranium and plutonium content and isotopic composition. Our laboratory is accredited according to ISO/IEC 17025 and has a proven track record of successful participation in numerous Inter-Laboratory Comparisons (ILCs), demonstrating our expertise and commitment to excellence in nuclear material analysis. …”
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  3. 443
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  5. 445

    Detection, Risk Assessment, and Survey of Four Polycyclic Aromatic Hydrocarbon Markers in Infant Formula Powder by Chenggang Cai, Pinggu Wu, Pingping Zhou, Dajin Yang, Zhengyan Hu

    Published 2020-01-01
    “…The developed method required the addition of an isotopically labeled internal standard, sample extraction under alkali conditions, a saponification step, and a solid-phase extraction purification step. …”
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  6. 446
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  8. 448

    Gas Seepage along the Edge of the Aquitaine Shelf (France): Origin and Local Fluxes by Livio Ruffine, Jean-Pierre Donval, Claire Croguennec, Laurent Bignon, Dominique Birot, Anne Battani, Germain Bayon, Jean-Claude Caprais, Nadine Lantéri, Denis Levaché, Stéphanie Dupré

    Published 2017-01-01
    “…Thus, the molecular and isotopic (δD and δ13C) analyses revealed that the gas seeps were primarily composed of methane. …”
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  9. 449

    Corroborating the magnetic easy axis of epitaxial (100) α-iron and (0001) BaFe12O19 thin films by 57Fe Mössbauer spectroscopy by Y. E. Li, J. Shine, C. Guguschev, M. Brützam, D. G. Schlom, N. Ravi

    Published 2025-01-01
    “…60 and 120 nm thick epitaxial films of isotopically enriched bcc iron (α-57Fe) grown on (100) MgO substrates are studied using x-ray diffraction, reflection high-energy electron diffraction (RHEED), and conversion electron Mössbauer spectroscopy (CEMS). …”
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  10. 450

    Age-Related Water Use Pattern of the Introduced Species Atriplex canescens Was Influenced by Root Distribution in Desert by Hai Zhou, Xiangyan Feng, Zhibin He, Bing Liu, Fang Li, Heng Ren, Qiyue Yang, Jianjun Kang, Shuai Wang, Wenzhi Zhao

    Published 2025-01-01
    “…Here, we examined the distribution of roots and isotopic values of δ18O and δD in soil water at depths ranging from 0 to 300 cm, groundwater, precipitation, and shrub xylem at different stages of shrub maturity to determine water use patterns in shrub plantations. …”
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  11. 451

    Diagenetic Fluid and Its Impact on Sandstone Reservoirs in the Southern Boxing Sag, Dongying Depression, Bohai Bay Basin, China by Zhenhuan Shen, Zhuang Ruan, Bingsong Yu, Shujun Han, Chenyang Bai, Qiuhong Chang, Tianxia An

    Published 2022-01-01
    “…The rare earth element (REE) pattern of bulk mudstone and carbonate cements as well as C–O isotopic evidences indicate that the diagenetic fluids of carbonate cementation are primarily controlled by the adjacent mudstone, whereas mineral dissolution and altered clay minerals in sandstone provide additional cations for the local reprecipitation of late-stage carbonate. …”
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  12. 452

    Mid-Late Holocene Stalagmite δ18O and δ13C Records in Naduo Cave, Guizhou Province, China by Jialu Wang

    Published 2021-01-01
    “…A stalagmite ND3 collected in Naduo Cave was used to reconstruct the history of local climate and environmental changes from 0.55 to 5.07 ka BP based on the data of 13 230Th ages and 642 groups of oxygen and carbon stable isotopes. First, according to correlation analysis, δ18O and δ13C were significantly correlated (correlation coefficient r = 0.308, n = 318, P<0.001) during the 5.07–2.00 ka BP period. …”
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  13. 453

    Hydrogeochemical Characteristics of the Haiyuan-Liupanshan Seismic Belt at the Northeastern Edge of the Tibet Plateau by Xinyan Li, Xiaopeng Liu, Jianguo Du, Yueju Cui, Fengxia Sun

    Published 2022-01-01
    “…The hydrogeochemical characteristics and groundwater recharge environments along the deep-cut Haiyuan-Liupanshan fault zone (HLFZ) were investigated by major ion and isotopic compositions (δ18O and δD) of the water samples collected at 14 sites from 2016 to 2017. …”
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  14. 454

    Transmutations of Long-Lived and Medium-Lived Fission Products Extracted from CANDU and PWR Spent Fuels in an Accelerator-Driven System by Alper Buğra Arslan, İlayda Yilmaz, Gizem Bakir, Hüseyin Yapici

    Published 2019-01-01
    “…The calculations bring out that in the modified ADS, LLFPs and MLFPs, which are extracted from thermal reactors, can be transformed to stable isotopes in significant amounts along with energy production.…”
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  15. 455

    Hydrogeochemical Characteristics and Formation of Low-Temperature Geothermal Waters in Mangbang-Longling Area of Western Yunnan, China by Xing-Wang Chang, Mo Xu, Liang-Wen Jiang, Xiao Li, Yun-Hui Zhang

    Published 2021-01-01
    “…This study focused on the hydrogeochemical evolution, reservoir temperature, and recharge origin of geothermal waters using hydrogeochemical and deuterium-oxygen (D-O) isotopic studies. The low-temperature geothermal waters were characterized by HCO3-Na type, while shallow cold spring was of the hydrochemical type of HCO3-Ca. …”
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  16. 456

    Proglacial methane emissions driven by meltwater and groundwater flushing in a high-Arctic glacial catchment by G. E. Kleber, G. E. Kleber, G. E. Kleber, L. Magerl, A. V. Turchyn, S. Schloemer, M. Trimmer, Y. Zhu, Y. Zhu, A. Hodson, A. Hodson

    Published 2025-02-01
    “…We measured methane concentrations in the glacial river of up to 3170 nM (nearly 800 times higher than the atmospheric equilibrium concentration) and found the methane to be of thermogenic origin through isotopic analysis. We estimated a total of 1.0 t of methane emissions during the 2021 melt season from the catchment, of which nearly two-thirds are being flushed from the glacier bed by the melt river. …”
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  17. 457

    Tolterodine is a novel candidate for assessing CYP3A4 activity through metabolic volatiles to predict drug responses by Valentina Stock, Rebecca Hofer, Franziska Lochmann, Vera Spanke, Klaus R. Liedl, Jakob Troppmair, Thierry Langer, Hubert Gstach, Christian Dank, Chris A. Mayhew, Sarah Kammerer, Veronika Ruzsanyi

    Published 2025-01-01
    “…For the first time, we identify an isotopically unlabelled CYP3A4 substrate, tolterodine that leads to the formation of a non-toxic volatile metabolite, acetone, which could potentially be applied to monitor CYP3A4 activity in humans. …”
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  18. 458
  19. 459

    Hydrogeochemistry, Geothermometry, and Genesis of the Hot Springs in the Simao Basin in Southwestern China by Yuqi Zhang, Xun Zhou, Haisheng Liu, Mingxiao Yu, Kuo Hai, Mengru Tan, Dongxue Huo

    Published 2019-01-01
    “…In this study, hydrochemical and isotopic analyses and mixed models are used to examine the sources of recharge, heat, and solutes of the hot springs to better understand the subsurface processes and formation mechanisms of different hot springs in the basin. …”
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  20. 460

    Ecological and genetic assessment of the consequences of radiation influence on contaminated areas by A. B. Bigaliev, K. Z. Shalabaeva, B. E. Shimshikov, S. S. Kobegenova, L. M. Adilova, A. N. Kozhakhmetova, S. Sharakhmetov, M. N. Burkhanova

    Published 2020-12-01
    “…A reconnaissance and radioecological examination of environmental objects was carried out using analytical methods, which made it possible to determine the quantitative content of toxic components, the content of priority pollutants and radioactive isotopes. It has been established that the values of the volumetric activity of natural and man-made radionuclides in soil samples, drinking water and biosubstrates (pet hair, human peripheral blood samples) from settlements correspond to the value of the control level for this region. …”
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