Results 21 to 30 of about 530,809 (300)

The gas phase cyclization of deprotonated N-aryl-2-cyano-2-diazoacetamides [PDF]

open access: yes, 2005
The document attached has been archived with permission from the publisher.1-Aryl-4-cyano-5-hydroxy-1,2,3-triazoles can be obtained in solution by base-catalysed cyclization of N-aryl-2-cyano-2-diazoacetamides.
Bilusich, D.   +6 more
core   +2 more sources

Оптимізм і песимізм в етичних концепціях М.Я. Грота, А. Швейцера, Н. Аббаньяно [PDF]

open access: yes, 2008
RATIONALE: Microscope mode imaging for secondary ion mass spectrometry is a technique with the promise of simultaneous high spatial resolution and high-speed imaging of biomolecules from complex surfaces.
Heeren, R.M.A.   +3 more
core   +1 more source

Proteogenomic analysis of Mycobacterium smegmatis using high resolution mass spectrometry

open access: yesFrontiers in Microbiology, 2016
Biochemical evidence is vital for accurate genome annotation. The integration of experimental data collected at the proteome level using high resolution mass spectrometry allows for improvements in genome annotation by providing evidence for novel gene ...
Matthys Gerhardus Potgieter   +7 more
doaj   +1 more source

Liquid chromatography – high resolution mass spectrometry screening of Astragalus hamosus and Astragalus corniculatus [PDF]

open access: yesPharmacia, 2021
Astragalus hamosus and Astragalus corniculatus were examined for the presence of flavoalkaloids, acylated and highly glycosylated flavonoids. Non-purified extracts of the overground parts of the species were subjected to ultra-high performance liquid ...
Aleksandar Shkondrov, Ilina Krasteva
doaj   +3 more sources

High resolution laser mass spectrometry bioimaging [PDF]

open access: yesMethods, 2016
Mass spectrometry imaging (MSI) was introduced more than five decades ago with secondary ion mass spectrometry (SIMS) and a decade later with laser desorption/ionization (LDI) mass spectrometry (MS). Large biomolecule imaging by matrix-assisted laser desorption/ionization (MALDI) was developed in the 1990s and ambient laser MS a decade ago.
Kermit K, Murray   +2 more
openaire   +2 more sources

Molecular Characterization of Glycerol Dialkyl Glycerol Tetraethers by High Resolution Orbitrap Mass Spectrometry [PDF]

open access: yesZhipu Xuebao, 2021
Isoprenoidal glycerol dibiphytanyl glycerol tetraethers (iso-GDGTs) and branched glycerol dialkyl glycerol tetraethers (br-GDGTs) have been widely used as biomarkers of archaea and bacteria for the investigation of paleoenvironment. The analysis of GDGTs
LI Yun-yun   +6 more
doaj   +1 more source

Analytical characterization of some synthetic cannabinoids, derivatives of indole-3-carboxylic acid [PDF]

open access: yes, 2013
By means of gas chromatography with high resolution mass spectrometry (GC-HRMS), ultra-high performance liquid chromatography in combination with high resolution tandem mass spectrometry (UHPLC-HRMS), nuclear magnetic resonance spectroscopy (NMR) and ...
Eltsov, O.   +4 more
core   +1 more source

Measuring the mass of an electron: an undergraduate laboratory experiment with high resolution mass spectrometry

open access: yesChemistry Teacher International, 2021
High-resolution mass spectrometry (HRMS) has become increasingly affordable and user-friendly. Its potential spans a wide range of applications and experiments including the measurement of accurate masses, supporting the elucidation of elemental ...
Bouza Marcos   +3 more
doaj   +1 more source

Thermal Activation of Copper Oxide Based upon the Copper Hydrotalcites of the Type CuxZn6-xCr2(OH)16(CO3).4H2O [PDF]

open access: yes, 2003
A combination of DSC and high resolution DTG coupled to a gas evolution mass spectrometer has been used to study the thermal properties of a series of Cu/Zn hydrotalcites of formulae CuxZn6-xAl2(OH)16(CO3).4H2O where x varied from 6 to 0.
Ding, Zhe, Frost, Raymond
core   +2 more sources

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

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