Results 1 to 10 of about 950,858 (353)

Upgrade to the focal-plane detector system of the S800 spectrograph at FRIB [PDF]

open access: yesEPJ Web of Conferences, 2023
The present work describes the ongoing upgrade of the focal-plane detector system and the associated data acquisition system of the large-acceptance S800 magnetic spectrograph.
Cortesi Marco   +8 more
doaj   +1 more source

Evaluation of GC/MS-Based 13C-Positional Approaches for TMS Derivatives of Organic and Amino Acids and Application to Plant 13C-Labeled Experiments

open access: yesMetabolites, 2023
Analysis of plant metabolite 13C-enrichments with gas-chromatography mass spectrometry (GC/MS) has gained interest recently. By combining multiple fragments of a trimethylsilyl (TMS) derivative, 13C-positional enrichments can be calculated. However, this
Younès Dellero   +2 more
doaj   +1 more source

Chlorine isotope composition in chlorofluorocarbons CFC-11, CFC-12 and CFC-113 in firn, stratospheric and tropospheric air [PDF]

open access: yes, 2014
The stratospheric degradation of chlorofluorocarbons (CFCs) releases chlorine, which is a major contributor to the destruction of stratospheric ozone (O3).
Allin, S. J.   +14 more
core   +12 more sources

Inferring individual marine migration from otolith ecogeochemical signatures of a wide-ranging fish

open access: yesFrontiers in Marine Science, 2022
Despite technical advances in archival tag attachment and functional longevity, long-term tracking of individuals of some fish species remains prohibitively difficult.
Nora Hanson   +4 more
doaj   +1 more source

Experimental evidence for extra proton exchange in ribulose 1,5-bisphosphate carboxylase/oxygenase catalysis

open access: yesCommunicative & Integrative Biology, 2022
Despite considerable advances in the past 50 y, the mechanism of ribulose 1,5-bisphosphate carboxylase/oxygenase (Rubisco) catalysis is still not well understood.
Camille Bathellier, Guillaume Tcherkez
doaj   +1 more source

The First 10 Million Years of Rear‐Arc Magmas Following Backarc Basin Formation Behind the Izu Arc

open access: yesGeochemistry, Geophysics, Geosystems, 2020
IODP Site U1437 is located in the Izu rear‐arc region, approximately 330 km west of the Izu‐Bonin trench axis. The oldest four units (Units IV through Unit VII) include volcaniclastic sediment and in situ hyaloclastites.
T. Miyazaki   +10 more
doaj   +1 more source

Potential use of winter green manure species for nitrogen recycling by ‘Niagara Rosada’ grapevines [PDF]

open access: yesCiência e Técnica Vitivinícola, 2014
Green manures have become an important option for recycling nutrients in organic cropping. However, its benefits are often not obtained in the short term.
Reis Júnior João R.   +5 more
doaj   +1 more source

Effects of spawning Pacific salmon on terrestrial invertebrates: Insects near spawning habitat are isotopically enriched with nitrogen‐15 but display no differences in body size

open access: yesEcology and Evolution, 2021
When Pacific salmon (Oncorhynchus spp.) spawn and die, they deliver marine‐derived nutrient subsidies to freshwater and riparian ecosystems. These subsidies can alter the behavior, productivity, and abundance of recipient species and their habitats ...
Nicola F. Rammell   +3 more
doaj   +1 more source

Assessment of groundwater quality in hard rock aquifer of central Telangana state for drinking and agriculture purposes

open access: yesApplied Water Science, 2018
Quality assessment of groundwater for drinking and irrigation was evaluated in parts of Nalgonda district of Telangana state, India. The overall groundwater quality and the suitability to drinking and irrigation were evaluated by hydrochemical analysis ...
Annadasankar Roy   +4 more
doaj   +1 more source

The vanadium isotopic constitution of petroleum asphaltenes: La Luna Formation (Venezuela) [PDF]

open access: yesJournal of the Serbian Chemical Society, 2000
High resolution mass spectrometry indicates that the isotopic abundance of 50Vanadium (V) of the Late Cretaceous La Luna petroleum asphaltenes and related source kerogen of marine origin (both highly enriched with V > 2000 ppm) is higher by ...
Premović Pavle I.   +7 more
doaj   +3 more sources

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