Results 151 to 160 of about 241,523 (262)

Effect of Laboratory Reagents for Cleaning Modern Contamination on the δ15N Integrity of Nitrogen‐Poor Samples

Rapid Communications in Mass Spectrometry, Volume 40, Issue 19, 15 October 2026.
ABSTRACT Rationale Nitrogen isotope values have been widely used for tracing ancient biogeochemical processes, but contaminant‐sensitive materials, such as Precambrian sedimentary rocks, meteorites, or returned extraterrestrial samples, often have low nitrogen levels and are thus vulnerable to modern organic contamination.
Kunmanee Bubphamanee, Andrew Schauer, Roger Buick   +2 more
wiley   +1 more source

Heavy metals and natural radioactive isotopes in phosphate and compound fertilisers and their impact on human health. [PDF]

Sci Rep
Łukaszek-Chmielewska A, Rachwał M, Rakowska J, Piec R, Podleśna A, Piotrowska B, Isajenko K, Mietelski JW, Kierepko R, Kosturkiewicz B.   +9 more
europepmc   +1 more source

Exploring the significance of Kenya's indigenous and emerging blue foods for sustainable aquaculture development. A review

Journal of the World Aquaculture Society, Volume 57, Issue 5, October 2026.
Abstract Kenya's aquaculture sector is at a pivotal stage, transitioning from a historical reliance on Nile tilapia and African catfish toward a more diversified production portfolio that integrates indigenous and emerging freshwater and marine species. This shift is increasingly recognized as essential to enhance climate resilience, food security, and
Jonathan Munguti, Mavindu Muthoka, Domitila Kyule, Esther Magondu, Kevin Obiero, Jimmy Mboya, Menaga Meenakshisundaram, Tanga M. Chrysantus, Gerald Kwikiriza, Francis K. Njonge   +9 more
wiley   +1 more source

Analysis of the Factors Influencing Nitrate Nitrogen Concentration Using Structural Equation Modeling: Integrating Natural Environmental and Hydrological Factors. [PDF]

Water Environ Res
Ji J, Xia Y, Liu Y, Wang D, Xiao X.
europepmc   +1 more source

A trait‐based integration of competition and abiotic tolerance underlies plant success

New Phytologist, Volume 252, Issue 1, Page 87-99, October 2026.
Competitive effect and abiotic tolerance show positive associations with species' niche breadth and local dominance. Summary Understanding what determines species' ecological success is a central challenge in ecology. Competitive ability and abiotic tolerance are expected to be strong predictors of species success, yet theory predicts a trade‐off ...
Jan Douda, Jana Doudová, Přemysl Král, Jan Häusler, Anežka Holeštová, Leandro Eusebio, Jiří Květoň, Alena Havrdová   +7 more
wiley   +1 more source

Characterizing Ethnomedicinal <i>Tetrastigma hemsleyanum</i> Diels et Gilg Grown Under Different Cultivation Methods Using Stable Isotopes and Elemental Analyses. [PDF]

Plants (Basel)
Wang C, Wang X, Mei H, Zhang Y, Li C, Rogers KM, Li Z, Yuan Y, Nie J.   +8 more
europepmc   +1 more source

Three New Calcium Formate Reference Materials for δ13C Measurements and a Redetermination of the R(13C/12C) Ratio for VPDB Based on Proton Nuclear Magnetic Resonance Measurements

Rapid Communications in Mass Spectrometry, Volume 40, Issue 18, 30 September 2026.
ABSTRACT Rationale Isotope ratio mass spectrometry (IRMS) and proton nuclear magnetic resonance (1H NMR) spectroscopy are independent techniques for determining the isotope ratio R(13C/12C) in organic compounds. However, the lack of suitable reference materials has limited intercalibration of results from these methods.
David W. Hoffman, Cornelia Rasmussen, Arndt Schimmelmann, Lauren T. Reid, Haiping Qi, Tyler B. Coplen   +5 more
wiley   +1 more source

When wet meets dry: An Ivuna-like impactor triggered volatile loss on the angrite parent body. [PDF]

Sci Adv
Zhu 朱柯 K, Chen Q, Yokoyama T, Yamaguchi A, Bouvier A, Chen L.   +5 more
europepmc   +1 more source

Stable chromium isotope fractionation during melt percolation: Implications for chromium isotopic heterogeneity in the mantle

Geoscience Frontiers
Haibo Ma, Li-Juan Xu, Yu-Wen Su, Chunyang Liu, Sheng-Ao Liu, Jia Liu, Zezhou Wang, Guochun Zhao   +7 more
openaire   +1 more source

Trivalent chromium interacts directly with acetylated lysine. [PDF]

J Trace Elem Med Biol
Wise RM, Jiang T, Meaza I, Feng C, Wise JP, Liu KJ, Zhou X.   +6 more
europepmc   +1 more source