Results 11 to 20 of about 451,287 (296)

Discrimination of Pakistani Fountain Pen Inks by Gas Chromatography-Mass Spectrometry (GC-MS)

International Journal of Analytical Chemistry, 2022
In developing countries, the chances of fraud in written documents are comparatively high. Therefore, comparison of fountain pen inks is especially imperative in examination of forensic questioned documents.
Mehwish Sharif, Muhammad Irfan Jalees, Syed Azhar Ali Shah Tirmazi, Muhammad Makshoof Athar, Arjumand Iqbal Durrani, Madeeha Batool   +5 more
doaj   +1 more source

Characterization of Aroma Compounds in Cooked Sorghum Using Comprehensive Two-Dimensional Gas Chromatography-Time-of-Flight Mass Spectrometry and Gas Chromatography-Olfactometry-Mass Spectrometry

Molecules, 2021
Sorghum is the major raw material for the production of Chinese Baijiu (Chinese liquor) and has a great effect on the flavor of Baijiu. Volatiles in cooked glutinous and non-glutinous sorghum samples were extracted using solid-phase microextraction (SPME)
Shuang Chen, Li Wang, Derang Ni, Lin Lin, Heyu Wang, Yan Xu   +5 more
doaj   +1 more source

State-of-the-Art Analytical Approaches for Illicit Drug Profiling in Forensic Investigations

Molecules, 2022
In forensic chemistry, when investigating seized illicit drugs, the profiling or chemical fingerprinting of drugs is considered fundamental. This involves the identification, quantitation and categorization of drug samples into groups, providing ...
Reem Ahmed, Mohamad J. Altamimi, Mayssa Hachem   +2 more
doaj   +1 more source

Gas chromatography-mass spectrometry in the taxonomy of Miscanthus

Вавиловский журнал генетики и селекции, 2020
Chemotaxonomy as a system approach deals with intra- and interspecific polymorphism of a group of taxa in order to clarify their taxonomic positions or to select material for selection or introduction.
N. M. Slynko, N. V. Burmakina, O. M. Potseluyev, S. Yu. Kapustyanchik, G. Yu. Galitsin, T. N. Goryachkovskaya, L. V. Kuybida, S. V. Shekhovtsov, S. E. Peltek, V. K. Shumny   +9 more
doaj   +1 more source

Pipecolic Acid Quantification Using Gas Chromatography-coupled Mass Spectrometry

Bio-Protocol, 2020
Pipecolic acid (Pip), a non-proteinacious product of lysine catabolism, is an important regulator of immunity in plants and humans alike. For instance, Pip accumulation is associated with the genetic disorder Zellweger syndrome, chronic liver diseases ...
Keshun Yu, huazhen liu, Pradeep Kachroo
doaj   +1 more source

Blood-Based Lipidomics Approach to Evaluate Biomarkers Associated With Response to Olanzapine, Risperidone, and Quetiapine Treatment in Schizophrenia Patients

Frontiers in Psychiatry, 2018
This is the first study to identify lipidomic markers in plasma associated with response of acutely ill schizophrenia patients in response to specific antipsychotic treatments.
Adriano Aquino, Guilherme L. Alexandrino, Paul C. Guest, Fabio Augusto, Alexandre F. Gomes, Michael Murgu, Johann Steiner, Johann Steiner, Daniel Martins-de-Souza, Daniel Martins-de-Souza, Daniel Martins-de-Souza   +10 more
doaj   +1 more source

Characterization and Quantification of Isoprene-Derived Epoxydiols in Ambient Aerosol in the Southeastern United States [PDF]

, 2010
Isoprene-derived epoxydiols (IEPOX) are identified in ambient aerosol samples for the first time, together with other previously identified isoprene tracers (i.e., 2-methyltetrols, 2-methylglyceric acid, C5-alkenetriols, and organosulfate derivatives of ...
Chan, Man Nin, Claeys, Magda, Eddingsaas, Nathan C., Edgerton, Eric S., Knipping, Eladio M., Seinfeld, John H., Shaw, Stephanie L., Surratt, Jason D., Tanner, Roger L., Wennberg, Paul O., Zheng, Mei   +10 more
core   +2 more sources

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

, 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, AD Hanson, AL Hartman, Atsushi Ogiwara, C Fattuoni, C Ruttkies, CL Linster, DY Lee, F Allen, Gert Wohlgemuth, GJ Patti, H Sperber, H Tsugawa, H Tsugawa, H Tsugawa, HD Flosadóttir, Hiroshi Tsugawa, I Yamamoto, J Budczies, JG Jeffryes, John Meissen, K Haug, Kohei Takeuchi, M Sud, Masanori Arita, Matthew Mueller, Megan Showalter, MP Styczynski, MR Showalter, O Fiehn, O Fiehn, O Fiehn, O Khersonsky, Oliver Fiehn, Peter Beal, RR da Silva, S Kim, S Kumari, Sajjan Mehta, SE Stein, SM Rappaport, T Kind, Tobias Kind, WR Wikoff, Yuxuan Zheng, Zijuan Lai   +45 more
core   +1 more source

Simultaneous Method for Selected PBDEs and HBCDDs in Foodstuffs Using Gas Chromatography—Tandem Mass Spectrometry and Liquid Chromatography—Tandem Mass Spectrometry

Toxics, 2022
Flame retardants are added to consumer products to retard the ignition of combustible materials. Technical mixtures of polybrominated diphenyl ethers (PBDEs) and hexabromocyclododecane (HBCDD) were massively used for several decades.
Eva Lipičar, Danijela Fras, Nino Javernik, Helena Prosen   +3 more
doaj   +1 more source

Simultaneous Determination of 20 Pyrazines in Baijiu by Gas Chromatography-Tandem Mass Spectrometry [PDF]

Shipin Kexue
In this study, a method for the simultaneous determination of 20 pyrazines in baijiu was established by direct injection (DI) combined with gas chromatography-tandem mass spectrometry (GC-MS/MS), and the pyrazines in 10 brands of baijiu with different ...
WANG Na, SHEN Yi, ZHUANG Yuan, CHENG Wei, LUO Sen, ZHANG Yadong, LIU Zixuan, LIU Bing, GAO Hongbo
doaj   +1 more source