Results 41 to 50 of about 3,513,162 (340)

Current challenges in software solutions for mass spectrometry-based quantitative proteomics [PDF]

open access: yes, 2012
This work was in part supported by the PRIME-XS project, grant agreement number 262067, funded by the European Union seventh Framework Programme; The Netherlands Proteomics Centre, embedded in The Netherlands Genomics Initiative; The Netherlands ...
Heck, AJR   +9 more
core   +1 more source

Analysis of Sulfur Isotope Composition of Gypsum Samples by Elemental Analyzer-Isotope Mass Spectrometry

open access: yesYankuang ceshi, 2020
BACKGROUND The conventional method for the measurement of sulfur isotopes in sulfate includes mainly barite conversion coupled with dual-inlet SO2 methods. These methods are facile and reliable.
GAO Jian-fei   +4 more
doaj   +1 more source

Sex-specific energy expenditure during the Alaska mountain wilderness ski classic; insights from an Arctic winter expedition

open access: yesFrontiers in Physiology
PurposeThe Alaska Mountain Wilderness Ski Classic (AMWSC) is a self-supported and self-oriented winter expedition that occurs in the remote North American Brooks Range, ∼200 km north of the Arctic Circle.
Melynda S. Coker   +6 more
doaj   +1 more source

The use of nitrogen-15 in microbial natural product discovery and biosynthetic characterization

open access: yesFrontiers in Microbiology, 2023
This mini-review covers the use of nitrogen-15 in bacterial and fungal natural product discovery and biosynthetic characterization from 1970 to 2022. Nitrogen is an important element in a number of bioactive and structurally intriguing natural products ...
Kalindi D. Morgan
doaj   +1 more source

An on-line solid phase extraction procedure for the routine quantification of urinary methylmalonic acid by liquid chromatography-tandem mass spectrometry [PDF]

open access: yes, 2010
Background: The goal of this study was to develop and to validate an improved isotope-dilution-liquid chromatography-tandem mass spectrometry (LC-MS/MS) method for the quantification of methylmalonic acid (MMA) in urine.
Michael Vogeser   +5 more
core   +1 more source

Quantification of growth hormone in serum by isotope dilution mass spectrometry [PDF]

open access: yes, 2009
Inter-assay variation of antibody based routine tests is hampering comparability of measurement results for growth hormone (GH) between different laboratories and decision making in clinical practice. Here it is demonstrated, that quantification of GH by
André Henrion   +4 more
core  

Emerging experimental and computational methods for studying redox‐regulated structural transitions

open access: yesFEBS Letters, EarlyView.
Redox reactions can reshape proteins and alter how they behave in cells, with important consequences for health and disease. This review explores emerging experimental and computational approaches for discovering these redox‐sensitive protein switches, revealing their structural effects, and predicting their behavior, opening new opportunities to ...
Tasneem Rass   +2 more
wiley   +1 more source

A cosmogenic 10Be anomaly during the late Miocene as independent time marker for marine archives

open access: yesNature Communications
Cosmogenic nuclide dating relies on the constancy of production and incorporation of radionuclides in geological archives. Anomalous deviations from constancy during the Holocene or Pleistocene are frequently used as global benchmarks to harmonize ...
Dominik Koll   +9 more
doaj   +1 more source

Isotope Mass Spectrometry in Meat Identification

open access: yesТехника и технология пищевых производств
Meat and meat products are consumed by a large proportion of the population. As a result, food scientists keep inventing new methods for meat identification, e.g., isotope mass spectrometry.
Lisitsyn Andrey   +5 more
doaj   +1 more source

Absorption and retinol equivalence of β-carotene in humans is influenced by dietary vitamin A intake

open access: yesJournal of Lipid Research, 2003
The effect of vitamin A supplements on metabolic behavior of an oral tracer dose of [14C]β-carotene was investigated in a longitudinal test-retest design in two adults.
Shawna L. Lemke   +7 more
doaj   +1 more source

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