Results 21 to 30 of about 269,983 (178)
Gas Chromatography-Mass Spectrometry of Volatile Organic Impurities in Whiskey
Техника и технология пищевых производств, 2022 Alcoholic beverages are complex multicomponent objects. Their quality and safety control is a serious analytical task that requires new, more accurate instrumental methods, e.g., chromatography-mass spectrometry.
Nataliya V. Shelekhova +3 more
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Carbohydrate Polymer Technologies and Applications, 2023 Oligosaccharides play a central role in plants and are involved in basal metabolism, and many other functions at cellular levels. Indeed, oligosaccharides analysis was stimulated by the development of analytical chemistry and computational biology and ...
Noureddine Benkeblia
doaj
Frontiers in Nutrition, 2023 BackgroundThe misuse of animal-derived stimulants in food is becoming increasingly common, and mass spectrometry (MS) is used extensively for their detection and analysis.
Qiang Zhang, Hongying Du, Yingjian Zhang
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Molecules, 2023 The concentration of polycyclic aromatic hydrocarbons (PAHs) in the atmosphere has been continually monitored since their toxicity became known, whereas nitro-PAHs (NPAHs) and oxy-PAHs (OPAHs), which are derivatives of PAHs by primary emissions or ...
Jungmin Jo +5 more
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Mobility of O$_2^-$ ions in supercritical Ar: Experiment and Molecular Dynamics Simulations [PDF]
International Journal of Mass Spectrometry 277 (2008) 220-222, 2008 A new analysis and new Molecular Dynamics (MD) simulations of the measurements of the mobility $\mu_{i}$ of O$_{2}^{-} $ ions in dense supercritical Ar gas are reported. $\mu_{i}$ shows a marked dependence on the distance from the critical temperature $T_{c}.$ A mobility defect appears as a function of the gas density and its maximum value occurs below
arxiv +1 more source
Highly sensitive single-molecule detection in slow protein ion beams [PDF]
Sci. Adv. 9, eadj2801 (2023), 2023 The analysis of proteins in the gas phase benefits from detectors that exhibit high efficiency and precise spatial resolution. Although modern secondary electron multipliers already address numerous analytical requirements, new methods are desired for macromolecules at low energy.
arxiv +1 more source
Simultaneous ambient pressure X-ray photoelectron spectroscopy and grazing incidence X-ray scattering in gas environments [PDF]
, 2021 We have developed an experimental system to simultaneously observe surface structure, morphology, composition, chemical state, and chemical activity for samples in gas phase environments. This is accomplished by simultaneously measuring X-ray photoelectron spectroscopy (XPS) and grazing incidence X-ray scattering (GIXS) in gas pressures as high as the ...
arxiv +1 more source
Pots and lipids: molecular and isotope evidence of the food processing at Maharski prekop
Documenta Praehistorica, 2012 The pottery assemblage from the Maharski prekop site was analysed to obtain insights into vessel use and husbandry practices. Total lipid extracts of pottery samples were subjected to gas chromatography (GC), gas chromatography–mass spectrometry (GC–MS),
Nives Ogrinc +4 more
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Biomedicines, 2021 Hydrophilic metabolites are closely involved in multiple primary metabolic pathways and, consequently, play an essential role in the onset and progression of multifactorial human disorders, such as Alzheimer’s disease.
Raúl González-Domínguez +5 more
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, 2018 Additional file 1. Details of the chemical standards used for the analysis; MS acquisition parameters for all three GC/MS systems, PAH levels in blank samples together with their respective Limits of Detection (LODs) and Limits of Quantification (LOQs) as well as repeatability and accuracy of fortified Quality Control (QC) samples.
Jeffery, Jana +5 more
openaire +1 more source