Results 151 to 160 of about 34,873 (245)

Thermal Desorption Gas Chromatography-Mass Spectrometry Methods for Minimally Invasive Organic Residue Analysis of Archeological Potsherds. [PDF]

Anal Chem
Geddes da Filicaia E, Maule CA, Nixon A, Peggie DA, Bull ID, Evershed RP, Roffet-Salque M.   +6 more
europepmc   +1 more source

Stable Carbon Isotope Values of Bacteria‐Specific Fatty Acids to Assess the Reactivity of Sedimentary Organic Matter in the St. Lawrence Estuary and Gulf

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 2, February 2026.
Abstract Coastal systems have seen increasing pressure from anthropogenic activities since the beginning of the century, affecting the health of these ecosystems. This increased pressure takes the form of an increase discharge of terrestrial organic matter (OM) and nutrients, leading to a higher primary productivity in the surface waters and to higher ...
Frédéric Leone, Yeganeh Mirzaei, Anic Imfeld, Bahar Pakseresht, Brandon L. Findlay, Yves Gélinas   +5 more
wiley   +1 more source

Carbon Cycle Succession Across a Permafrost Thaw Gradient in Northeastern Alberta as Revealed by δ13C in Dissolved Solids, Gases, and Particulates in Lakes

Journal of Geophysical Research: Biogeosciences, Volume 131, Issue 2, February 2026.
Abstract δ13C in particulate organic carbon (POC), dissolved organic carbon (DOC), dissolved inorganic carbon (DIC), carbon dioxide (CO2(g)) and methane (CH4(g)), together with geochemical modeling, were applied to describe carbon cycle evolution in 40 boreal lakes situated across a permafrost thaw gradient in northeastern Alberta, Canada, where ...
J. J. Gibson, P. Eby, A. Jaggi
wiley   +1 more source

The effects of bleaching products on the color stability of ion-releasing restoratives. [PDF]

BMC Oral Health
Lee JS, Yahya NA, Abdul Aziz A, Yap AU.
europepmc   +1 more source

Pliocene–Pleistocene Redox Evolution of the Peruvian Margin: A Multi‐Proxy Approach

Paleoceanography and Paleoclimatology, Volume 41, Issue 2, February 2026.
Abstract Due to upwelling of nutrient‐rich waters, the Peruvian Margin is one of the most productive regions of the global ocean, hosting one of the most pronounced and shallowest oxygen minimum zones. This combination of high productivity and low oxygen makes the Peruvian margin a critical site for reconstructing past environmental changes.
P. L. Fraga‐Ferreira, C. Siebert, M. F. Lehmann, M. Frank, F. Scholz   +4 more
wiley   +1 more source

Alterations in ¹³C and ¹⁵N Isotope Abundance as Potential Biomarkers for Tumor Biology and Risk Factors for Cervical Lymph Node Metastases in Oral Squamous Cell Carcinoma. [PDF]

Cancers (Basel)
Bogusiak K, Paneth P, Kobos J, Kozakiewicz M.   +3 more
europepmc   +1 more source

Subsurface leaf and root litter enhance soil carbon formation compared to surface litter: Direct evidence from a 13C‐labelled incubation experiment

Functional Ecology, Volume 40, Issue 2, Page 390-404, February 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Litter inputs are a primary source of soil carbon (C), and balancing C sequestration against litter‐induced priming effects (PE) is critical for maintaining soil C dynamics. External disturbances (e.g.
Ruihuan Zhang, Yuqi Wei, Bin Wei, Yixian Bi, Tongtian Guo, Gaowen Yang, Yingjun Zhang, Nan Liu   +7 more
wiley   +1 more source

Isotopologue Ratios Identify ¹³C-Depleted Biomarkers in Environmental Samples Impacted by Methane Turnover. [PDF]

Rapid Commun Mass Spectrom
Groninga J, Lipp J, Song M, Hinrichs KU.
europepmc   +1 more source

Plant diversity increases microbial resistance to drought and soil carbon accumulation

Journal of Ecology, Volume 114, Issue 2, February 2026.
We investigated how plant diversity influenced soil microbial processes during moist conditions and an experimental drought. Higher plant diversity increased below‐ground plant input. This increased respiration but not microbial growth, resulting in a build‐up of microbial biomass (1) and also enhanced microbial growth resistance to drought (2).
Sara Winterfeldt, Richard D. Bardgett, Albert C. Brangarí, Nico Eisenhauer, Lettice C. Hicks, Shangshi Liu, Johannes Rousk   +6 more
wiley   +1 more source

A Synergistic Approach Combining Stable Carbon Isotope Ratio Analysis and Melissopalynology for the Authentication of Honey from Thailand. [PDF]

Foods
Judprasong K, Sinpoo C, Naksuriyawong S, Kamdee K, Meepho SA, Phokasem P, Saengkorakot C, Fungklin R, Uapoonphol N, Disayathanoowat T, Esor J, Thongphichai W, Boonsirichai K.   +12 more
europepmc   +1 more source