Results 21 to 30 of about 1,649,552 (239)

A TGA/FTIR and Mass Spectral Study on the Thermal Degradation of Bisphenol A Polycarbonate [PDF]

open access: yes, 2004
The thermal degradation of polycarbonate under nitrogen was studied using TGA/FTIR, GC/MS and LC/MS as a function of mass loss. The gases evolved during degradation were inspected by in situ FTIR and then the evolved products were collected and analysed ...
Jang, Bok Nam, Wilkie, Charles A.
core   +2 more sources

Utility of Comprehensive GC×GC Gas Chromatography in Finding Varietal Markers among Volatile Compounds in Non-Aromatic Red Wines

open access: yesAgronomy, 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

GC–MS and GC–MS/MS measurement of malondialdehyde (MDA) in clinical studies: Pre-analytical and clinical considerations

open access: yesJournal 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  

Identifying metabolites by integrating metabolome databases with mass spectrometry cheminformatics. [PDF]

open access: yes, 2018
Novel metabolites distinct from canonical pathways can be identified through the integration of three cheminformatics tools: BinVestigate, which queries the BinBase gas chromatography-mass spectrometry (GC-MS) metabolome database to match unknowns with ...
A El-Tayeb   +45 more
core   +1 more source

Determination of gamma-hydroxybutyric acid in dried blood spots using a simple GC-MS method with direct 'on spot' derivatization [PDF]

open access: yes, 2010
The objective of this study was the development of an accurate and sensitive method for the determination of gamma-hydroxybutyric acid (GHB) in dried whole blood samples using a GC-MS method.
Ingels, Ann-Sofie   +2 more
core   +1 more source

Drying Enhances Signal Intensities for Global GC–MS Metabolomics

open access: yesMetabolites, 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
doaj   +1 more source

Flavor volatiles evolution of Chinese horse bean-chili-paste during ripening, accessed by GC×GC-TOF/MS and GC-MS-olfactometry

open access: yesInternational 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]

open access: yesJournal 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

Development and validation of a GC-MS method for the detection and quantification of clotiapine in blood and urine specimens and application to a postmortem case [PDF]

open access: yes, 2015
INTRODUCTION: Clotiapine is an atypical antipsychotic of the dibenzothiazepine class introduced in a few European countries since 1970, efficient in treatment-resistant schizophrenic patients.
Busardo', FRANCESCO PAOLO   +5 more
core   +5 more sources

Separation and identification of antibacterial chamomile components using OPLC, bioautography and GC-MS [PDF]

open access: yes, 2012
Components of 50% ethanolic chamomile (Matricaria recutica L.) flower extract, previously found antibacterial in a TLC-bioautographic study, were separated and isolated by the use of on-line OPLC, which consisted of an OPLC 50 BS system, an on-line ...
Héthelyi, Éva B.   +5 more
core   +1 more source

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