Results 251 to 260 of about 13,316 (289)

Seismic shifts in the geochemical and microbial composition of a Yellowstone aquifer. [PDF]

PNAS Nexus
Boyd ES, Colman DR, Menchaca A, Spietz RL, Shoemaker A, Finn C, Mencin D, Andrade-Barahona E, Cox A, Kieft T, Bilek S, Hungerford J, Onstott TC.   +12 more
europepmc   +1 more source

Uncovering hidden protein modifications with native top-down mass spectrometry. [PDF]

Nat Methods
Bennett JL, El-Baba TJ, Zouboulis KC, Kirschbaum C, Song H, Butroid FI, Benesch JLP, Lutomski CA, Robinson CV.   +8 more
europepmc   +1 more source

Forest Nitrogen Dynamics in Response to Increasing Nitrogen Deposition: Comparing Above-Canopy and Soil Fertilizations in a Mature Beech Forest. [PDF]

Glob Chang Biol
Teglia A, Sbrana C, Mattana S, Scartazza A, Bucci M, Gioacchini P, Marcolini G, Muzzi E, Ravaioli D, Ribas A, Magnani F, Guerrieri R.   +11 more
europepmc   +1 more source

Stable Carbon Isotope Analysis of Perfluorooctanoic Acid (PFOA) by Microflow-High Pressure Liquid Chromatography-Orbitrap Mass Spectrometry. [PDF]

Rapid Commun Mass Spectrom
Wojtal PK, Davidheiser-Kroll B, Lane CS, Mead RN.   +3 more
europepmc   +1 more source

Atmospheric Trace Gas Abundances and Stable Isotope Ratios via IR-LIF

, 2004
Geoffrey A. Blake
openalex   +1 more source

<i>In situ</i> analysis of titanium isotope ratios in stardust using LA-CC-MC-ICPMS/MS.

J Anal At Spectrom
Shaw KMM, Pfeifer M, Coath BLL, Lewis J, Bevan D, Coath CD, Elliott T.   +6 more
europepmc   +1 more source

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Isotopic Abundances in Comets

Space Science Reviews, 2003
Isotopic ratios in comets provide keys for the understanding of the origin of cometary material, and the physical and chemical conditions in the early Solar Nebula. We review here measurements acquired on the D/H, 12C/13C, 16O/18O, 14N/15N, 32S/34S ratios in dust and gases, and discuss their cosmogonic implications.
Altwegg, Kathrin, Bockelée-Morvan, Dominique   +1 more
openaire   +2 more sources

Halogen Abundances and Isotopes

2021
Halogen (F, Cl, Br and I) abundance and isotope geochemistry may be used to gain insights into the complex cycling of volatiles on Earth. Despite the typically low abundances of the halogens in Earth and planetary materials, they play an important role in numerous geochemical processes.
openaire   +1 more source

Maximum abundant isotopes correlation

Astrophysics and Space Science, 1978
The neutron excess of the most abundant isotopes of the elements shows an overall linear dependence upon the neutron number for nuclei between netron closed shells. This maximum abundant isotopes correlation supports the arguments for a common history of the elements during nucleosynthesis.
openaire   +1 more source