Results 21 to 30 of about 5,566,634 (283)

DNA damage and reactive nitrogen species are barriers to Vibrio cholerae colonization of the infant mouse intestine. [PDF]

PLoS Pathogens, 2011
Ingested Vibrio cholerae pass through the stomach and colonize the small intestines of its host. Here, we show that V. cholerae requires at least two types of DNA repair systems to efficiently compete for colonization of the infant mouse intestine. These
Bryan W Davies, Ryan W Bogard, Nicole M Dupes, Tyler A I Gerstenfeld, Lyle A Simmons, John J Mekalanos   +5 more
doaj   +1 more source

Seasonal cycles of ozone and oxidized nitrogen species in northeast Asia - 2 : A model analysis of the roles of chemistry and transport [PDF]

, 2002
[1] The dominant factors controlling the seasonal variations of ozone (O-3) and three major oxidized nitrogen species, peroxyacetyl nitrate (PAN), nitrogen oxides (NOx), and nitric acid (HNO3), in northeast Asia are investigated by using a three ...
Kato, S, Tanaka, S, Tanimoto, H, Komazaki, Y, Furutani, H, Wild, O, Akimoto, H, Makide, Y, Hashimoto, S   +8 more
core   +4 more sources

Reaction Cycles of Halogen Species in the Immune Defense: Implications for Human Health and Diseases and the Pathology and Treatment of COVID-19

Cells, 2020
There is no vaccine or specific antiviral treatment for COVID-19, which is causing a global pandemic. One current focus is drug repurposing research, but those drugs have limited therapeutic efficacies and known adverse effects. The pathology of COVID-19
Qing-Bin Lu
doaj   +1 more source

Adventitious Root Formation in Plants: The Implication of Hydrogen Peroxide and Nitric Oxide

Antioxidants, 2023
Adventitious root formation is defined as the formation of new roots on above-ground plant parts and is considered crucial for the survival of a plant under harsh environmental conditions (i.e., flooding, salt stress, and other abiotic stresses) as well ...
Peter Anargyrou Roussos
doaj   +1 more source

Reactive oxygen species scavenging by catalase is important for female lutzomyia longipalpis fecundity and mortality [PDF]

, 2011
The phlebotomine sand fly Lutzomyia longipalpis is the most important vector of American visceral leishmaniasis (AVL), the disseminated and most serious form of the disease in Central and South America.
Genta, Fernando A., Diaz-Albiter, Hector, Dillon, Rod J., Mitford, Roanna, Sant'Anna, Mauricio R. V.   +4 more
core   +5 more sources

Biologically Relevant Small Radicals

CHIMIA, 2008
Biologically relevant small radicals are at the focus of the working group 4 (WG4) of the COST Action CM0603 (Free Radicals in Chemical Biology, CHEMBIORADICAL). This article surveys the areas of research being undertaken by the partners in WG4.
Georg Bauer, Gabor Speier, Gabor Merenyi, Jozsef Kaizer, Sara Goldstein, Bernard T. Golding, Georg Gescheidt, Lidia Gebicka, Jerzy L. Gebicki, Chryssostomos Chatgilialoglu, Peter Wardman   +10 more
doaj   +1 more source

Dangers of hyperoxia

Critical Care, 2021
Oxygen (O2) toxicity remains a concern, particularly to the lung. This is mainly related to excessive production of reactive oxygen species (ROS). Supplemental O 2 , i.e. inspiratory O2 concentrations (FIO2) > 0.21 may cause hyperoxaemia (i.e.
Mervyn Singer, Paul J. Young, John G. Laffey, Pierre Asfar, Fabio Silvio Taccone, Markus B. Skrifvars, Christian S. Meyhoff, Peter Radermacher   +7 more
doaj   +1 more source

Juggling with reactive oxygen species and antioxidant defense system – A coping mechanism under salt stress

Plant Stress, 2022
Even under optimal conditions many metabolic processes produce ROS like superoxide anion (O2.-), hydrogen peroxide (H2O2) and hydroxyl radicals (OH⋅), particularly in chloroplast and mitochondria.
Divya Singh
doaj   +1 more source

Teaching the basics of redox biology to medical and graduate students: Oxidants, antioxidants and disease mechanisms

Redox Biology, 2013
This article provides a succinct but limited overview of the protective and deleterious effects of reactive oxygen and nitrogen species in a clinical context.
Balaraman Kalyanaraman
doaj   +1 more source

Interplay between oxidant species and energy metabolism

Redox Biology, 2016
It has long been recognized that energy metabolism is linked to the production of reactive oxygen species (ROS) and critical enzymes allied to metabolic pathways can be affected by redox reactions. This interplay between energy metabolism and ROS becomes
Celia Quijano, Madia Trujillo, Laura Castro, Andrés Trostchansky   +3 more
doaj   +1 more source