Electrochemistry and Electrogenerated Chemiluminescence of n-Pentyl and Phenyl BODIPY Species: Formation of Aggregates from the Radical Ion Annihilation Reaction

2010 ◽  
Vol 114 (34) ◽  
pp. 14453-14460 ◽  
Author(s):  
Alexander B. Nepomnyashchii ◽  
Martin Bröring ◽  
Johannes Ahrens ◽  
Robin Krüger ◽  
Allen J. Bard
Keyword(s):  
Electrogenerated Chemiluminescence ◽  
Species Formation ◽  
Annihilation Reaction

Increased Demethylmenaquinone‐Dependent Reactive Oxygen Species Formation by Β-Lactams in Enterococcus Faecalis

2018 ◽  
Author(s):  
Loïc Léger ◽  
Aurélie Budin-Verneuil ◽  
Margherita Cacaci ◽  
Abdellah Benachour ◽  
Axel Hartke ◽  
...  
Keyword(s):  
Reactive Oxygen Species ◽  
Enterococcus Faecalis ◽  
Reactive Oxygen ◽  
Oxygen Species ◽  
Reactive Oxygen Species Formation ◽  
Species Formation

Compounds from Ilex paraguariensis extracts have antioxidant effects in the brains of rats subjected to chronic immobilization stress

2017 ◽  
Vol 42 (11) ◽  
pp. 1172-1178 ◽  
Author(s):  
Ana C. Colpo ◽  
Maria Eduarda de Lima ◽  
Marisol Maya-López ◽  
Hemerson Rosa ◽  
Cristina Márquez-Curiel ◽  
...  
Keyword(s):  
Oxidative Damage ◽  
Immobilization Stress ◽  
Brain Regions ◽  
Protective Role ◽  
Ilex Paraguariensis ◽  
Protective Effects ◽  
Species Formation ◽  
Lipid And Protein Oxidation ◽  
Response To Stress ◽  
Chronic Immobilization Stress

Immobilization induces oxidative damage to the brain. Ilex paraguariensis extracts (Mate) and their major natural compound, chlorogenic acid (CGA), exert protective effects against reactive oxygen species formation. Here, the effects of Mate and CGA on oxidative damage induced by chronic immobilization stress (CIS) in the cortex, hippocampus, and striatum were investigated. For CIS, animals were immobilized for 6 h every day for 21 consecutive days. Rats received Mate or CGA by intragastric gavage 30 min before every restraint session. Endpoints of oxidative stress (levels of lipid peroxidation, protein carbonylation, and reduced (GSH) and oxidized (GSSG) forms of glutathione) were evaluated following CIS. While CIS increased oxidized lipid and carbonyl levels in all brain regions, CGA (and Mate to a lesser extent) attenuated lipid and protein oxidation as compared with control groups. GSH/GSSG balance showed a tendency to increase in all regions in response to stress and antioxidants. Taken together, our results support a protective role of dietary antioxidants against the neuronal consequences of stress.

Quantification of electrogenerated chemiluminescence from tris(bipyridine)ruthenium(ii) and hydroxyl ions

2020 ◽  
Vol 22 (27) ◽  
pp. 15413-15417 ◽  
Author(s):  
Andrea Fiorani ◽  
Giovanni Valenti ◽  
Irkham ◽  
Francesco Paolucci ◽  
Yasuaki Einaga
Keyword(s):  
Emission Intensity ◽  
Reaction Rate ◽  
Electrogenerated Chemiluminescence

In this work, we quantify the electrogenerated chemiluminescence arising from the reaction of electrogenerated tris(bipyridine)ruthenium(iii) with hydroxyl ions, in terms of emission intensity and reaction rate.

Electrogenerated chemiluminescence detection of trace level pentachlorophenol using carbon quantum dots

The Analyst ◽  
2013 ◽  
Vol 138 (7) ◽  
pp. 2038 ◽  
Author(s):  
Jiezhen Li ◽  
Niya Wang ◽  
ThanhThuy Tran.T ◽  
Chen'an Huang ◽  
Lan Chen ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Carbon Quantum Dots ◽  
Electrogenerated Chemiluminescence ◽  
Chemiluminescence Detection ◽  
Trace Level

scholarly journals Effect of Novel Marine Nutraceuticals on IL-1α-Mediated TNF-αRelease from UVB-Irradiated Human Melanocyte-Derived Cells

2011 ◽  
Vol 2011 ◽  
pp. 1-11 ◽  
Author(s):  
Visalini Muthusamy ◽  
Lynn D. Hodges ◽  
Theodore A. Macrides ◽  
Glen M. Boyle ◽  
Terrence J. Piva
Keyword(s):  
Antioxidant Properties ◽  
Mitogen Activated Protein Kinase ◽  
Uvb Radiation ◽  
Reactive Oxygen Species Formation ◽  
Mapk Signalling Pathway ◽  
Species Formation ◽  
Human Melanocyte ◽  
Mapk Signalling ◽  
Mitogen Activated Protein ◽  
Necrosis Factor

UV-induced inflammation and reactive oxygen species formation are involved in the development of melanoma. Natural products like 5β-scymnol and CO2-supercritical fluid extract (CO2-SFE) of mussel oil contain anti-inflammatory and antioxidant properties that may aid in reducing the deleterious effects of UV radiation. Therefore, their effect on the release of the proinflammatory cytokine, tumour necrosis factor-α(TNF-α), from UVB-irradiated human melanocytic cells was examined. Human epidermal melanocytes (HEM) and MM96L melanoma cells were exposed to UVB radiation and IL-1α. Cell viability and TNF-αlevels were determined 24 hours after-irradiation while p38 mitogen-activated protein kinase (MAPK) activation was observed at 15 min after-irradiation. Whenα-tocopherol, CO2-SFE mussel oil, and 5β-scymnol were added to the UVB-irradiated HEM cells treated with IL-1α, TNF-αlevels fell by 53%, 65%, and 76%, respectively, while no inhibition was evident in MM96L cells. This effect was not due to inhibition of the intracellular p38 MAPK signalling pathway. These compounds may be useful in preventing inflammation-induced damage to normal melanocytes.

Experimental Study of Gaseous Sulfur Species Formation during the Steam Hydrogasification of Coal

2014 ◽  
Vol 28 (5) ◽  
pp. 3399-3402 ◽  
Author(s):  
Qian Luo ◽  
Chan S. Park ◽  
Arun S. K. Raju ◽  
Joseph M. Norbeck
Keyword(s):  
Experimental Study ◽  
Sulfur Species ◽  
Steam Hydrogasification ◽  
Species Formation ◽  
Gaseous Sulfur
Sign in / Sign up

Export Citation Format

Share Document