Results 21 to 30 of about 429,865 (338)
Detection of Δ9-tetrahydrocannabinol (THC) in hair using GC–MS
Egyptian Journal of Forensic Sciences, 2014 Detection of drugs from hair samples has become an imperative technique in forensic toxicological analysis. In this study, hair samples were collected from 20 cannabis users undergoing treatment at a rehabilitation center at different time intervals ...
Himanshu Khajuria, Biswa P. Nayak
doaj +1 more source
Comparison of GC/time-of-flight MS with GC/quadrupole MS for halocarbon trace gas analysis [PDF]
Atmospheric Measurement Techniques, 2015 We present the application of time-of-flight mass spectrometry (TOF MS) for the analysis of halocarbons in the atmosphere after cryogenic sample preconcentration and gas chromatographic separation.
J. Hoker +3 more
doaj +1 more source
Journal of Mass Spectrometry and Advances in the Clinical Lab, 2023 Malondialdehyde (MDA; 1,3-propanedial, OHC-CH2-CHO) is one of the most frequently measured biomarkers of oxidative stress in plasma and serum. L-Arginine (Arg) is the substrate of nitric oxide synthases (NOS), which convert L-arginine to nitric oxide (NO)
Dimitrios Tsikas
doaj
Agronomy, 2022 To investigate the utility of comprehensive GC×GC gas chromatography metabolomics in finding varietal markers among volatile compounds in non-aromatic red wines, representative samples of the two most important Croatian monovarietal red wines, Plavac ...
Igor Lukić +2 more
doaj +1 more source
The GC MS Study of One Ayurvedic Formulation, Navayasa Churnam.
J Pharm Bioallied SciBackground: Navayasa Churnam is an Ayurvedic medicine traditionally used to treat anemia, heart diseases, skin disorders, piles, and jaundice. Aim: The present study involves GC-MS analysis of Navayasa Churnam, an Ayurvedic medicine traditionally used to
Sudhan A +8 more
europepmc +2 more sources
Drying Enhances Signal Intensities for Global GC–MS Metabolomics
Metabolites, 2019 We report here that a straightforward change of the standard derivatization procedure for GC–MS metabolomics is leading to a strong increase in metabolite signal intensity.
Manuel Liebeke, Erik Puskás
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International Journal of Food Properties, 2020 The evolution of volatile compounds during the ripening of Chinese horse bean-chili-paste (CHCP) was investigated in this study. GC×GC-TOF/MS allowed an identification of 748 volatiles in three CHCP samples, respectively, ripened for 3 months (M3), 12 ...
Yunhao Lu +5 more
doaj +1 more source
GC-MS vs. GC-MS-MS analysis of pentacyclic terpanes in crude oils from Libya and Serbia - a comparison of two methods [PDF]
Journal of the Serbian Chemical Society, 2017 The values of parameters calculated from distribution and abundance of the selected pentacyclic terpanes in crude oils from Libya and Serbia, which were originally derived from gas chromatography-mass spectrometry (GC–MS) were compared with results of ...
Faraj Musbah Abduljalil M. +5 more
doaj +1 more source
Breath analysis by gas chromatography-mass spectrometry and electronic nose to screen for pleural mesothelioma : a cross-sectional case-control study [PDF]
, 2017 Rationale: Malignant pleural mesothelioma (MPM) is mainly caused by previous exposure to asbestos fibers and has a poor prognosis. Due to a long latency period between exposure and diagnosis, MPM incidence is expected to peak between 2020-2025. Screening
Brinkman, Paul +9 more
core +9 more sources
Peak Alignment of Gas Chromatography-Mass Spectrometry Data with Deep Learning
, 2019 We present ChromAlignNet, a deep learning model for alignment of peaks in Gas Chromatography-Mass Spectrometry (GC-MS) data. In GC-MS data, a compound's retention time (RT) may not stay fixed across multiple chromatograms. To use GC-MS data for biomarker
Li, Mike, Wang, X. Rosalind
core +1 more source