scholarly journals Determination of the Antioxidant Status of the Skin by In Vivo-Electron Paramagnetic Resonance (EPR) Spectroscopy

Cosmetics ◽  
2015 ◽  
Vol 2 (3) ◽  
pp. 286-301 ◽  
Author(s):  
Silke Lohan ◽  
Anna-Christina Lauer ◽  
Sophia Arndt ◽  
Annette Friedrich ◽  
Kathrin Tscherch ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Epr Spectroscopy ◽  
Antioxidant Status ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

SU-C-BRD-05: Non-Invasive in Vivo Biodosimetry in Radiotherapy Patients Using Electron Paramagnetic Resonance (EPR) Spectroscopy

2015 ◽  
Vol 42 (6Part2) ◽  
pp. 3192-3193 ◽  
Author(s):  
N Bahar ◽  
K Roberts ◽  
F Stabile ◽  
N Mongillo ◽  
RD Decker ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Epr Spectroscopy ◽  
Paramagnetic Resonance ◽  
Non Invasive ◽  
Electron Paramagnetic

Applications of in vivo electron paramagnetic resonance (EPR) spectroscopy: measurements of pO2 and NO in endotoxin shock

2001 ◽  
Vol 120 (1-3) ◽  
pp. 253-257 ◽  
Author(s):  
Simon K. Jackson ◽  
Melanie Madhani ◽  
Matthew Thomas ◽  
Graham S. Timmins ◽  
Philip E. James
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Epr Spectroscopy ◽  
Endotoxin Shock ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

scholarly journals Electron paramagnetic resonance spectroscopic studies of iron and copper proteins

2003 ◽  
Vol 17 (1) ◽  
pp. 53-63 ◽  
Author(s):  
Fatai A. Taiwo
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Epr Spectroscopy ◽  
Structural Characteristics ◽  
Spectroscopic Studies ◽  
Coordination Geometry ◽  
Copper Proteins ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic ◽  
Protein Moiety

Transition metal (d-group) ions are widespread in nature, essential for structural characteristics and mechanistic specificity of many proteins. Iron and copper are the two most prevalent metals in proteins responsible for the storage and transport of molecules, ions, and electrons. Electron paramagnetic resonance (EPR) spectroscopy has been extensively used for the determination of these metal ions without extensive disruption of the native protein moiety. It also detects variations in coordination geometry due to ligand substitutions as well as multiple valencies of the same metal. This review highlights the unique application of EPR spectroscopy to the study of iron and copper in biological systems. Mention is made of a select number of other metalloproteins.

Electron paramagnetic resonance (EPR) spectroscopy: Food, biomedical and pharmaceutical analysis

2020 ◽  
Vol 9 (3-4) ◽  
pp. 165-182
Author(s):  
Siavash Iravani ◽  
Ghazaleh Jamalipour Soufi
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Drug Release ◽  
Epr Spectroscopy ◽  
Pharmaceutical Analysis ◽  
Direct Detection ◽  
Spectroscopic Method ◽  
Paramagnetic Resonance ◽  
Electron Paramagnetic

Electron paramagnetic resonance (EPR) spectroscopy can be applied as an effective and non-invasive spectroscopic method for analyzing samples with unpaired electrons. EPR is suitable for the quantification of radical species, assessment of redox chemical reaction mechanisms in foods, evaluation of the antioxidant capacity of food, as well as for the analysis of food quality, stability, and shelf life. It can be employed for evaluating and monitoring the drug release processes, in vitro and in vivo. EPR can be employed for the direct detection of free radical metabolites, and the evaluation of drug release mechanisms from biodegradable polymers; it can be employed for analyzing the drug antioxidant effects. Additionally, spatial resolution can be achieved through EPR-imaging. EPR spectroscopy and imaging have shown diverse applications in food, biomedical and pharmaceutical fields, and also more applications are predictable to emerge in the future. This review highlights recent advances and important challenges related to the application of EPR in food, biomedical and pharmaceutical analysis and assessment.

ДИНИТРОЗИЛЬНЫЕ КОМПЛЕКСЫ ЖЕЛЕЗА C ТИОЛСОДЕРЖАЩИМИ ЛИГАНДАМИ ПРЕДСТАВЛЕНЫ В ЖИВЫХ ОРГАНИЗМАХ В ОСНОВНОМ ИХ БИЯДЕРНОЙ ФОРМОЙ

2020 ◽  
Vol 65 (6) ◽  
pp. 1142-1153
Author(s):  
В.Д. Микоян ◽  
◽  
Е.Н. Бургова ◽  
Р.Р. Бородулин ◽  
А.Ф. Ванин ◽  
...  
Keyword(s):  
Electron Paramagnetic Resonance ◽  
Sodium Nitrite ◽  
Iron Complexes ◽  
Paramagnetic Resonance ◽  
First Case ◽  
Dinitrosyl Iron ◽  
Electron Paramagnetic ◽  
Dinitrosyl Complexes

The number of mononitrosyl iron complexes with diethyldithiocarbamate, formed in the liver of mice in vivo and in vitro after intraperitoneal injection of binuclear dinitrosyl iron complexes with N-acetyl-L-cysteine or glutathione, S-nitrosoglutathione, sodium nitrite or the vasodilating drug Isoket® was assessed by electron paramagnetic resonance (EPR). The number of the said complexes, in contrast to the complexes, formed after nitrite or Isoket administration, the level of which sharply increased after treatment of liver preparations with a strong reducing agent - dithionite, did not change in the presence of dithionite. It was concluded that, in the first case, EPR-detectable mononitrosyl iron complexes with diethyldithiocarbamate in the absence and presence of dithionite appeared as a result of the reaction of NO formed from nitrite with Fe2+-dieth- yldithiocarbamate and Fe3+-diethyldithiocarbamate complexes, respectively. In the second case, mononitrosyl iron complexes with diethyldithiocarbamate appeared as a result of the transition of iron-mononitosyl fragments from ready-made iron-dinitrosyl groups of binuclear dinitrosyl complexes, which is three to four times higher than the content of the mononuclear form of these complexes in the tissue...

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