Results 51 to 60 of about 478,907 (316)
Amino acid precursors from a simulated lower atmosphere of Titan: Experiments of cosmic ray energy source with 13 C- and 18 O-stable isotope probing mass spectrometry [PDF]
Published on Analytical Sciences, 29, 777-785 (2013), 2013 The organic haze of aerosols that shrouds the Saturnian moon Titan has previously been studied by both observations and laboratory simulation experiments. Here we report the abiotic formation of amino acid precursors in complex organic molecules during experimental simulation of the environment near Titan's surface with proton irradiation. Pyrolysis of
arxiv +1 more source
Generic sample preparation combined with high-resolution liquid chromatography- time-of-flight mass spectrometry for unification of urine screening in doping-control laboratories [PDF]
, 2010 A unification of doping-control screening procedures of prohibited small molecule substances—including stimulants, narcotics, steroids, ß2-agonists and diuretics—is highly urgent in order to free resources for new classes such as banned proteins ...
Georgakopoulos, C.G. +4 more
core +3 more sources
Metabolites, 2023 Ankylosing spondylitis (AS) is a type of chronic rheumatic immune disease, and the crucial point of AS treatment is identifying the correct stage of the disease. However, there is a lack of effective diagnostic methods for AS staging.
Yixuan Guo +6 more
doaj +1 more source
Advanced Engineering Materials, EarlyView.This study demonstrates the feasibility of fabricating free‐standing carbon paper electrodes by electroplating and galvanic replacement. Nanostructured AgM (M = Au, Pt, Pd) bimetallic catalysts are directly grown on the electrode substrate, which exhibit good performance for glycerol electrolysis, a sustainable approach for the co‐production of green ...
Hui Luo, Maria‐Magdalena Titirici
wiley +1 more source
Headspace-gas chromatography/mass spectrometry analysis of methanol in blood
Medicine Science, 2017 A headspace gas chromatographic-mass spectrometric (HS-GC/MS) method was developed for detection of ethanol and methanol in blood and quality control and validation was performed.
Dilek Salkim Islek, Sibel Ramadanoglu
doaj +1 more source
Scientific Reports, 2021 We have measured the volatile fingerprints of four pathogenic oral bacteria connected to periodontal disease and dental abscess: Porphyromonas gingivalis (three separate strains), Prevotella intermedia, Prevotella nigrescens and Tannerella forsythia ...
Kajsa Roslund +6 more
doaj +1 more source
Silicon clusters produced by femtosecond laser ablation: Non-thermal emission and gas-phase condensation [PDF]
Applied Physics A 79 (2004) 1591-1594, 2004 Neutral silicon clusters Si_n (up to n = 7) and their cations Si_n+ (up to n = 10) have been produced by femtosecond laser ablation of bulk silicon in vacuum and investigated using time-of-flight mass spectrometry. Two populations of the Si_n+ clusters with different velocity and abundance distributions in the ablation plume have been clearly ...
arxiv +1 more source
Pyrolysis-Gas Chromatography/Mass Spectrometry of Polymeric Materials [PDF]
, 2012 Examples of application of pyrolysis-gas chromatography-mass spectrometry technique for identification of different polymeric materials are ...
Peter Kusch
core +2 more sources
Hybrid Framework Materials: Next‐Generation Engineering Materials
Advanced Engineering Materials, EarlyView.Hybrid organic–inorganic materials merge the unique properties of organic and inorganic compounds, enabling applications in optoelectronics, gas storage, and catalysis. This review explores metal‐organic frameworks, hybrid organic–inorganic perovskites, and the emerging field of hybrid glasses, emphasizing their structures, functionalities, and ...
Jay McCarron +2 more
wiley +1 more source
Isolation of $^{236}$U and $^{239,240}$Pu from seawater samples and its determination by Accelerator Mass Spectrometry [PDF]
Talanta, Volume 178, 2018, Pages 202-210In this work we present and evaluate a radiochemical procedure optimised for the analysis of $^{236}$U and $^{239,240}$Pu in seawater samples by Accelerator Mass Spectrometry (AMS). The method is based on Fe(OH)$_3$ co-precipitation of actinides and uses TEVA and UTEVA extraction chromatography resins in a simplified way for the final U and Pu ...
arxiv +1 more source