Tryptophan Oxidation by Singlet Molecular Oxygen [O2(1Δg)]: Mechanistic Studies Using18O-Labeled Hydroperoxides, Mass Spectrometry, and Light Emission Measurements

2008 ◽  
Vol 21 (6) ◽  
pp. 1271-1283 ◽  
Author(s):  
Graziella E. Ronsein ◽  
Mauricio C. B. Oliveira ◽  
Sayuri Miyamoto ◽  
Marisa H. G. Medeiros ◽  
Paolo Di Mascio
Keyword(s):  
Mass Spectrometry ◽  
Molecular Oxygen ◽  
Light Emission ◽  
Mechanistic Studies ◽  
Singlet Molecular Oxygen ◽  
Tryptophan Oxidation

Cholesterol Hydroperoxides Generate Singlet Molecular Oxygen [O2(1Δg)]: Near-IR Emission,18O-Labeled Hydroperoxides, and Mass Spectrometry

2011 ◽  
Vol 24 (6) ◽  
pp. 887-895 ◽  
Author(s):  
Miriam Uemi ◽  
Graziella E. Ronsein ◽  
Fernanda M. Prado ◽  
Flávia D. Motta ◽  
Sayuri Miyamoto ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Molecular Oxygen ◽  
Singlet Molecular Oxygen ◽  
Near Ir ◽  
Ir Emission

Detection of Singlet Molecular Oxygen Generated by Lipid Hidroperoxide Labeled With 18O2(1Δg) Using a New Anthracene Derivative Fluorescent Probe by Mass Spectrometry

2011 ◽  
Vol 51 ◽  
pp. S137
Author(s):  
Marilene Silva Oliveira ◽  
José Pedro Friedmann Angeli ◽  
Florencio Porto Freitas ◽  
Fernanda Manso Prado ◽  
Flávia Daniella Motta ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Fluorescent Probe ◽  
Molecular Oxygen ◽  
Singlet Molecular Oxygen ◽  
Anthracene Derivative

Dioxygen NIR FT-Emission (1Δg → 3Σ−g) and Raman Spectra of 1,4-Dimethylnaphthalene Endoperoxide: A Source of Singlet Molecular Oxygen

1992 ◽  
Vol 46 (2) ◽  
pp. 236-239 ◽  
Author(s):  
Paolo Di Mascio ◽  
Etelvino J. H. Bechara ◽  
Joel C. Rubim
Keyword(s):  
Raman Spectrum ◽  
Molecular Oxygen ◽  
Light Emission ◽  
Array Detector ◽  
Diode Array ◽  
Diode Array Detector ◽  
Singlet Molecular Oxygen ◽  
Peak Intensity ◽  
Β Carotene ◽  
Ingaas Detector

Singlet molecular oxygen (1O2) monomol light emission (O2, 1Δ g → 3Σ− g) generated during the thermodissociation of 1,4-dimethylnaphthalene endoperoxide (1,4-DMNO2) has been directly detected with the use of an FT spectrophotometer equipped with a liquid nitrogen-cooled InGaAs detector. The 1O2 quenching by β-carotene has been observed. The bimol emission has also been detected by the use of an intensified diode array detector and characterized by enhancement with 1,4-diazabicyclo[2.2.2]octane (DABCO). With a multichannel detector it was possible to obtain the Raman spectrum of 1,4-DMNO2 and to follow its conversion into the parent hydrocarbon 1,4-dimethylnaphthalene (1,4-DMN) by the decrease of the Raman 715-cm−1 peak intensity attributed to the O-O stretching mode.

Lysozyme Oxidation by Singlet Molecular Oxygen: Cross-Linking Formation and Proposed Mechanism Using 18-O Labeled Oxygen and Mass Spectrometry Measurements

2015 ◽  
Vol 87 ◽  
pp. S149-S150
Author(s):  
Emerson Finco Marques ◽  
Alexsandra Cristina Scalfo ◽  
Marina Helena Gennari de Medeiros ◽  
Paolo Di Mascio
Keyword(s):  
Mass Spectrometry ◽  
Molecular Oxygen ◽  
Cross Linking ◽  
Singlet Molecular Oxygen

Chapter 32. [18O]-Labeled Singlet Molecular Oxygen: Chemical Generation and Trapping as a Tool for Mechanistic Studies

2016 ◽  
pp. 135-150 ◽  
Author(s):  
Sayuri Miyamoto ◽  
Glaucia R. Martinez ◽  
Graziella E. Ronsein ◽  
Emerson F. Marques ◽  
Fernanda M. Prado ◽  
...  
Keyword(s):  
Molecular Oxygen ◽  
Mechanistic Studies ◽  
Singlet Molecular Oxygen
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