Results 41 to 50 of about 3,686 (163)

In search of cues: dung beetle attraction and the significance of volatile composition of dung [PDF]

open access: yes, 2018
Volatile organic compounds (VOCs) provide animals with multiple cues about location, type, and condition of valuable resources such as food. In particular, odour cues are often essential for the localization and discrimination of resources with patchy ...
Blüthgen, Nico   +3 more
core   +2 more sources

Can volatile organic metabolites be used to simultaneously assess microbial and mite contamination level in cereal grains and coffee beans?

open access: yesPLoS ONE, 2013
A novel approach based on headspace solid-phase microextraction (HS-SPME) combined with comprehensive two-dimensional gas chromatography-time-of-flight mass spectrometry (GC×GC-ToFMS) was developed for the simultaneous screening of microbial and mite ...
Angelo C Salvador   +6 more
doaj   +1 more source

Characteristic volatile compounds in different parts of grass carp by comprehensive two-dimensional gas chromatography/time-of-flight mass spectrometry

open access: yesInternational Journal of Food Properties, 2020
Freshwater fish are usually unpopular with people, mainly because of their unappealing earthy and fishy smell. Comprehensive two-dimensional gas chromatography is a relatively new analytical technique.
Hongli Wang   +4 more
doaj   +1 more source

Technical note: Use of an atmospheric simulation chamber to investigate the effect of different engine conditions on unregulated VOC-IVOC diesel exhaust emissions [PDF]

open access: yes, 2018
Diesel exhaust emissions were introduced into an atmospheric simulation chamber and measured using thermal desorption (TD) comprehensive two-dimensional gas chromatography coupled to a flame ionisation detector (GC × GC-FID).
G. McFiggans   +11 more
core   +3 more sources

Analytical Methods of Levoglucosan, a Tracer for Cellulose in Biomass Burning, by Four Different Techniques

open access: yesAsian Journal of Atmospheric Environment, 2012
A comparison of analytical approaches for Levoglucosan (C6H10O5, commonly formed from the pyrolysis of carbohydrates such as cellulose) and used for a molecular marker in biomass burning is made between the four different analytical systems.
Min-Suk Bae   +7 more
doaj   +1 more source

Identification of a plasma signature of psychotic disorder in children and adolescents from the Avon Longitudinal Study of Parents and Children (ALSPAC) cohort [PDF]

open access: yes, 2017
The identification of an early biomarker of psychotic disorder is important as early treatment is associated with improved patient outcome. Metabolomic and lipidomic approaches in combination with multivariate statistical analysis were applied to ...
Ahonen, L   +11 more
core   +4 more sources

Comparison of Pre-Processing and Variable Selection Strategies in Group-Based GC×GC-TOFMS Analysis

open access: yesSeparations, 2019
Chemometric analysis of comprehensive two-dimensional chromatography coupled to time-of-flight mass spectrometry (GC×GC-TOFMS) data has been reported with various workflows, yet little effort has been devoted to evaluating the impacts of workflow ...
Paulina Piotrowski, Benjamin Place
doaj   +1 more source

Comparison of Components in Oil Derived from Tyre Pyrolysis with and without KL Catalyst Using GC × GC / TOF-MS

open access: yesChemical Engineering Transactions, 2014
Typically, the products from waste tyre pyrolysis consist of (i) gas fraction (18 – 23 %wt ), (ii) liquid fraction (41 – 49 %wt), and (iii) char fraction (38 – 40 %wt).
S. Pithakratanayothin, S. Jitkarnka
doaj   +1 more source

Pyrolysis-GC×GC-TOFMS to characterize carbonaceous chondrites [PDF]

open access: yes, 2005
Using pyrolysis-GCxGC-TOFMS to analyze organic carbon in carbonaceous chondrites gives a massive increase in both sensitivity and structural information from samples when compared to traditional Py-GC ...
Gilmour, I.   +6 more
core  

Comprehensive 2‐dimensional gas chromatography fast quadrupole mass spectrometry (GC × GC‐qMS) for urinary steroid profiling: Mass spectral characteristics with chemical ionization [PDF]

open access: yes, 2011
Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/89453/1/dta380 ...
Ahmadkhaniha   +33 more
core   +1 more source

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