Fragmentation method for assigning oxidation numbers in organic and bioorganic compounds

2021 ◽  
Author(s):  
Pong Kau Yuen ◽  
Cheng Man Diana Lau
Keyword(s):  
Bioorganic Compounds

The influence of the host–guest interaction on the oxidation of natural flavonoid dyes

2011 ◽  
Vol 76 (12) ◽  
pp. 1651-1667 ◽  
Author(s):  
Šárka Ramešová ◽  
Romana Sokolová ◽  
Ilaria Degano ◽  
Magdaléna Hromadová ◽  
Miroslav Gál ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Inclusion Complex ◽  
Fluorescence Intensity ◽  
Oxidation Product ◽  
Aqueous Media ◽  
Electrochemical Methods ◽  
Redox Potentials ◽  
Decomposition Products ◽  
Degradation Processes ◽  
Bioorganic Compounds

The influence of the molecular cavity protection on degradation processes of bioorganic compounds quercetin and luteolin used as the original dyes in old tapestries was studied. The degradation processes were studied by electrochemical methods in aqueous media. The products of the exhaustive electrolysis were separated and identified by GC-MS analysis. Cyclic voltammetry characteristics indicate that the inclusion complex is formed. The inclusion affects the redox potentials of both oxidation waves related to the different dissociation forms of the flavonoid molecule. It was shown that decomposition products formed by the oxidation of quercetin are stabilized in the cavity of β-cyclodextrin, including the main oxidation product 2(3′,4′-dihydroxybenzoyl)-2,4,6-trihydroxybenzofuran-3(2H)-one. The formation of the 1:1 inclusion complex of luteolin with β-cyclodextrin is supported by the enhancement of fluorescence intensity. In the case of quercetin, a decrease of fluorescence intensity occurs when 1:1 inclusion complex with β-cyclodextrin is formed.

scholarly journals Feasibility of Detecting Bioorganic Compounds in Enceladus Plumes with the Enceladus Organic Analyzer

Astrobiology ◽  
2017 ◽  
Vol 17 (9) ◽  
pp. 902-912 ◽  
Author(s):  
Richard A. Mathies ◽  
Md Enayet Razu ◽  
Jungkyu Kim ◽  
Amanda M. Stockton ◽  
Paul Turin ◽  
...  
Keyword(s):  
Bioorganic Compounds

scholarly journals Standoff detection and classification procedure for bioorganic compounds by hyperspectral laser-induced fluorescence

2015 ◽  
Author(s):  
Thomas Fischbach ◽  
Frank Duschek ◽  
Anita Hausmann ◽  
Carsten Pargmann ◽  
Valeri Aleksejev ◽  
...  
Keyword(s):  
Laser Induced Fluorescence ◽  
Classification Procedure ◽  
Standoff Detection ◽  
Bioorganic Compounds

Application of the 77Se Solid State NMR for Investigation of Bioorganic Compounds—the Case of Selenomethionine

2008 ◽  
Vol 183 (4) ◽  
pp. 1061-1066 ◽  
Author(s):  
Jarosław Gajda ◽  
Marek J. Potrzebowski ◽  
Anna Bujacz ◽  
Grzegorz Bujacz
Keyword(s):  
Solid State ◽  
Solid State Nmr ◽  
Bioorganic Compounds
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