Results 51 to 60 of about 318,307 (167)

The influence of extracellular superoxide on iron redox chemistry and bioavailability to aquatic microorganisms

Frontiers in Microbiology, 2012
Superoxide, the one-electron reduced form of dioxygen, is produced in the extracellular milieu of aquatic microbes through a range of abiotic chemical processes and also by microbes themselves.
Andrew eRose
doaj   +1 more source

The chemistry of peroxynitrite, a biological toxin

Química Nova, 1998
Oxyradicals play a tole in several diseases. While for several decades the hydroxyl radical - produced via the Fenton reaction - has been considered the species that initiates oxyradical damage, new findings suggest that much of this damage can be ...
W. H. Koppenol
doaj   +1 more source

A study on the comparison of antioxidant effects among cultivated ginseng, and cultivated wild ginseng extracts -Using the measurement of superoxide and hydroxy radical scavenging activities-

Journal of Pharmacopuncture, 2009
Objectives : The objective of this study was to compare the antioxidant effects among cultivated wild ginseng and ginseng extracts. Methods : In vitro antioxidant activities were examined by superoxide and hydroxyl radical scavenging activities of ...
Tae Jin, Rhim, Heesun, Jeong, Young Jin Kim, Doo Young, Kim, Young ju, Han, Haeyon, Kwon, Ki Rok, Kwon   +6 more
doaj   +1 more source

Superoxide Anions Inhibit Intracellular Calcium Response in Porcine Airway Smooth Muscle Cells

American Journal of Perinatology Reports
Background Superoxide anions (O2 −) have multiple effects on pulmonary parenchyma altering cell proliferation, cellular metabolism, and airway smooth muscle (ASM) contraction.
Ramesh Krishnan, Mathur S. Kannan, Deepak A. Deshpande   +2 more
doaj   +1 more source

RvD2 mitigates TNFɑ-Induced mitochondrial reactive oxygen species through NRF2 signaling in placental trophoblasts

Frontiers in Physiology
IntroductionHypertensive disorders of pregnancy (HDP) are marked by elevated levels of TNFα, which increases reactive oxygen species (ROS) and disrupts metabolism of trophoblasts. Resolvin D2 (RvD2), an omega‐3 fatty acid-derived lipid mediator, is known
Taija Hahka, Taija Hahka, Taija Hahka, Deekshika Sekar, Prakash Kumar Sahoo, Aiswariya Ravi, Colman Freel, Colman Freel, Chandan Krishnamoorthy, Sankar Ramamurthy, Rebekah Rapoza, Rebecca Drakowski, Anum Akbar, Matt VanOrmer, Melissa Thoene, Corrine K. Hanson, Tara Nordgren, Sathish Kumar Natarajan, Sathish Kumar Natarajan, Ann Anderson Berry, Ann Anderson Berry   +20 more
doaj   +1 more source

Superoxide and superoxide dismutase in pulmonary hypoxic vasoconstriction [PDF]

, 2002
Superoxide is known to cause vascular damage and can consume protective NO that maintains a low pulmonary pressure. There is evidence suggesting that hypoxia upregulates NADH/NADPH oxidase and xanthine oxidase in the smooth muscle and endothelial cells of the pulmonary artery, increasing superoxide production.
Milliken, P.H., Wadsworth, R.M.
openaire   +2 more sources

Metabolismo oxidativo de heterófilos de avestruzes jovens Oxidative metabolism by heterophils from young ostriches

Ciência Rural, 2009
Foi avaliada a hipótese que, à semelhança dos neutrófilos de mamíferos, a produção de superóxido pelos heterófilos de avestruzes está associada com a maturidade funcional dessas células. Foram utilizados 20 avestruzes de ambos os sexos, divididos em dois
Silvia Cellone Trevelin, Tatiana de Sousa Barbosa, Valéria Maria Savoya da Silva, Paulo César Ciarlini   +3 more
doaj  

Superoxide Dismutases

Annual Review of Biochemistry, 1974
openaire   +4 more sources

Effect of a magnetic field on the activity of superoxide dismutase studied at the enzyme level. [PDF]

RSC Adv
Yoon S, Chang SC, Payne GF, Lee S, Kyhm K, Park SG, Kang M.   +6 more
europepmc   +1 more source

Verification of quantum biological predictions for weak magnetic field effects on superoxide in planarians. [PDF]

PNAS Nexus
Rishabh R, Vučković J, Zadeh-Haghighi H, Beane WS, Simon C.   +4 more
europepmc   +1 more source