Results 191 to 200 of about 35,305 (286)

Wet Season Carbon (δ13C) and Nitrogen (δ15N) Composition of Modern Plants as Isotopic Framework for Agropastoral and Palaeoecological Studies in Northern Greece

Archaeometry, Volume 68, Issue S2, Page S150-S160, May 2026.
ABSTRACT Mediterranean wetlands are one of Europe's most vital and endangered biodiversity hotspots. This study determined the carbon (δ13C) and nitrogen (δ15N) isotope values of modern plants to construct an isotopic framework by which to contextualize agropastoral management in and around past wetland ecosystems.
Doris Vidas‐Cardador, Amy Styring, Michael Charles, Valasia Isaakidou, Paul Halstead, Amy Bogaard   +5 more
wiley   +1 more source

A High-Precision Analytical Technique for Dissolved N₂ Isotopes in Aquatic Systems: Biogeochemical Applications and Determination of Solubility Equilibrium Isotope Effects. [PDF]

Rapid Commun Mass Spectrom
McPaul K, Wankel SD, Seltzer AM.
europepmc   +1 more source

Morphological, Molecular, and Isotopic Approaches to Termite Ecology: A Mangrove Case Study

Biotropica, Volume 58, Issue 3, May 2026.
Termite communities in Caribbean mangroves, though species‐poor, sustain crucial decomposition and nutrient cycling. Their overlapping niches and stochastic assembly highlight termites' resilience and ecological importance in supporting the functioning of these challenging coastal ecosystems.
Robin Casalla, Rafik Neme, Judith Korb
wiley   +1 more source

Site-specific hydrogen isotope measurements of vanillin by ²H-qNMR and GC-IRMS. [PDF]

Anal Bioanal Chem
Le PM, Greule M, Sokolenko S, Akoka S, Remaud G, Costa P, Isaac KS, Simpson A, Keppler F, Meija J.   +9 more
europepmc   +1 more source

Multiscale Approximations to Understand the Complex Role of Microglia in Alzheimer's Disease

European Journal of Neuroscience, Volume 63, Issue 9, May 2026.
Microglia are dynamic, context‐dependent regulators of Alzheimer's disease, modulating amyloid, tau, and neurodegeneration across disease stages. Integrating multiscale and human‐focused approaches is essential to translate microglial biology into therapeutic strategies. ABSTRACT Microglia, the resident innate immune cells of the central nervous system,
Patricia Martínez‐Tazo, Marina Mejias‐Ortega, Verónica López‐López, Aysha M. Bhojwani‐Cabrera, Emma Saxton, Santiago Canals, Giles Hardingham, Antonia Gutierrez, Jose P. Lopez‐Atalaya, Silvia De Santis   +9 more
wiley   +1 more source

Advances in steroid purification for novel techniques in carbon isotope ratio mass spectrometry of doping control. [PDF]

RSC Adv
Li Z, Cheng J, Zhao C, Chen Q, Liu B, Chen P.   +5 more
europepmc   +1 more source

Ryugu reference project: Recommendations from the measurement definition team

Meteoritics &Planetary Science, Volume 61, Issue 5, Page 819-848, May 2026.
Abstract Sample return missions play a significant role in planetary science by providing pristine extraterrestrial materials. JAXA's Hayabusa2 and NASA's OSIRIS‐REx missions have returned samples from the C‐type asteroids Ryugu and Bennu, respectively. The chemical and mineralogical compositions of these samples closely resemble those of CI chondrites,
Tetsuya Yokoyama, Guillaume Avice, Henner Busemann, Nicolas Dauphas, Daniel P. Glavin, Ashley J. King, Thorsten Kleine, Katharina Lodders, Frederic Moynier, Maria Schönbächler, Yoshinori Takano, Kun Wang, Hikaru Yabuta, Yuma Enokido, Ryota Fukai, Shogo Tachibana, Tomohiro Usui   +16 more
wiley   +1 more source

Arbuscular mycorrhizal fungal families and exploration‐based guilds exhibit distinct responses to long‐term N, P and K deficiencies and imbalances

New Phytologist, Volume 250, Issue 3, Page 1846-1862, May 2026.
Summary Many agroecosystems face nitrogen (N), phosphorus (P) or potassium (K) deficiencies due to imbalanced or insufficient nutrient replenishment after biomass harvest. How this affects the symbiosis between plants and arbuscular mycorrhizal fungi (AMF) and the abundance of exploration‐based AMF guilds (rhizophilic, edaphophilic and ancestral ...
Kian Jenab, Lauren Alteio, Ksenia Guseva, Stefan Gorka, Sean Darcy, Lucia Fuchslueger, Alberto Canarini, Victoria Martin, Julia Wiesenbauer, Felix Spiegel, Bruna Imai, Hannes Schmidt, Karin Hage‐Ahmed, Erich M. Pötsch, Andreas Richter, Jan Jansa, Christina Kaiser   +16 more
wiley   +1 more source

Lessons Learned in Orbitrap MS-Based Isotope Ratio Analysis of Organic Acid Mixtures. [PDF]

Anal Chem
Machado HG, Mueller EP, Ribeiro JCO, Bevilaqua GB, Dos Santos GF, Ferreira AA, Rocha YS, Bhattacharjee S, Eiler JM, Gontijo B.   +9 more
europepmc   +1 more source

Effects of warming on plant uptake of post‐fire nitrogen in an arctic heath tundra

New Phytologist, Volume 250, Issue 3, Page 1510-1521, May 2026.
Summary Postfire nitrogen (N) becomes increasingly important with the rising frequency of fires in arctic tundra, and climate warming is expected to accelerate plant recovery following fire. However, how plants differ in utilizing this postfire N and how their postfire N uptake responds to warming remains unknown.
Wenyi Xu, Per Lennart Ambus
wiley   +1 more source