Results 131 to 140 of about 327,817 (261)

Isotope determination of sulfur by mass spectrometry in soil samples Determinação isotópica de enxofre por espectrometria de massas (irms) em amostras de solo

open access: yesRevista Brasileira de Ciência do Solo, 2012
Sulphur plays an essential role in plants and is one of the main nutrients in several metabolic processes. It has four stable isotopes (32S, 33S, 34S, and 36S) with a natural abundance of 95.00, 0.76, 4.22, and 0.014 in atom %, respectively. A method for
Alexssandra Luiza Rodrigues Molina Rossete   +3 more
doaj  

Serum bile acids as a prognostic biomarker in biliary atresia following Kasai portoenterostomy

open access: yesHepatology, EarlyView., 2022
Serum bile acid levels predict outcomes in patients with biliary atresia who achieve normalized bilirubin levels after Kasai portoenterostomy. Abstract Background and Aims In biliary atresia, serum bilirubin is commonly used to predict outcomes after Kasai portoenterostomy (KP).
Sanjiv Harpavat   +22 more
wiley   +1 more source

Effects of acid leaching on the Sr-Nd-Hf isotopic compositions of ocean island basalts.

open access: yes, 2010
The ability to conduct multi-isotopic analyses (e.g., Sr-Nd-Hf-Pb) on the same sample is critical for studies that evaluate the mantle source components of oceanic basalts.
Nobre Silva, Ines G.   +2 more
core   +1 more source

Relationships among tissues, biofluids, and otolith selenium concentrations in wild female burbot (Lota lota)

open access: yesIntegrated Environmental Assessment and Management, EarlyView., 2023
Abstract In the Lake Koocanusa‐Kootenai River system (Montana, USA and British Columbia, Canada), selenium (Se) contamination has become an international concern and is suspected to contribute to the observed burbot (Lota lota) population collapse. Due to our limited ability to sample burbot in Lake Koocanusa for monitoring studies, we used a reference
Stephanie D. Graves   +6 more
wiley   +1 more source

INVESTIGATIONS OF THE POTASSIUM-ARGON METHOD OF AGE DETERMINATION USING SOLID ISOTOPIC DILUTION AND GAS REMOVAL BY CRUSHING

open access: yes, 1961
Preliminary work on a new technique of isotopic dilution analysis useful in the measurement of radiogenic Ar content of rocks or mineral samples in age determination is reported.
Naughton, J.J.
core   +1 more source

isotopic-shift-t-02.dat

open access: yes, 2012
16O -> 18O isotopic shift (as defined in J. Sup. Nov. Mag. 20, 603) for a model O-Cu-O cluster with an electron hopping of t=0.5eV This is part of my attempt to reproduce J. Sup. Nov. Mag. 20, 603.
Andres Garcia Saravia Ortiz de Montellano (97230)
core   +1 more source

Seasonal Fluctuations of Plastochromanol‐8 and α‐Tocopherol Amounts in the Leaves of Cecropia Trees

open access: yesJournal of the American Oil Chemists' Society, EarlyView.
ABSTRACT Plastochromanol‐8 (PC‐8) is a homologue of γ‐tocotrienol with a longer side chain (eight instead of three isoprene units) and therefore also a representative of the tocochromanol (vitamin E) group. PC‐8 has been determined in various plants and seeds, with Cecropia sp. leaves showing unusually high levels.
Rosalie Ormos, Jörg Rau, Walter Vetter
wiley   +1 more source

Growth-and feeding-related isotopic dilution and enrichment patterns in young-of-the-year yellow perch (Perca flavescens)

open access: yes, 2020
populations varied between and within sites and depended on maternal trophic status and timing of ontogenetic dietary shifts, as determined by prey availability and site-specific biogeochemical factors. 5.
Karen J Murchi, Michael Power, E And
core  

isotopic-shift-t-07.dat

open access: yes, 2012
16O -> 18O isotopic shift (as defined in J. Sup. Nov. Mag. 20, 603) for a model O-Cu-O cluster with an electron hopping of t=0.7eV This is part of my attempt to reproduce J. Sup. Nov. Mag. 20, 603.
Andres Garcia Saravia Ortiz de Montellano (97230)
core   +1 more source

Self‐Assembled Telecom Color Centers in Silicon and Their Growth Environment

open access: yesAdvanced Physics Research, EarlyView.
Influence of the growth pressure during the formation of self‐assembled color centers in silicon grown by molecular beam epitaxy at ultra‐low temperatures on the color center's photoluminescence spectral signature. The growth pressure crucially determines color center selectivity, as evidenced by G‐centers, W‐centers, and T‐centers, matrix purity, and ...
Jacqueline Marböck   +9 more
wiley   +1 more source

Home - About - Disclaimer - Privacy