Concept

Stress oxydant

Publications associées (265)

PHOTOCATALYTIC DISINFECTION TREATMENTS: VIABILITY, CULTIVABILITY AND METABOLIC CHANGES OF E. coli USING DIFERENT MESUREMENTS METHODS

In this work, the oxidative stress was produced by the illumination of either fixed TiO2 or suspended TiO2. and the relation between cultivability and viability under oxidative conditions was studied using a Direct Viable Count (DVC) and Fluorescence In Si ...

2011

The metabolic footprint of aging in mice

Johan Auwerx, Kristina Schoonjans, Carlos Canto Alvarez, Pénélope Andreux, Raphaël Doenlen, Richardus Houtkooper, Ellen Helena Jeninga

Aging is characterized by a general decline in cellular function, which ultimately will affect whole body homeostasis. Although DNA damage and oxidative stress all contribute to aging, metabolic dysfunction is a common hallmark of aging at least in inverte ...

2011

E2F transcription factor-1 regulates oxidative metabolism

Johan Auwerx

Cells respond to stress by coordinating proliferative and metabolic pathways. Starvation restricts cell proliferative (glycolytic) and activates energy productive (oxidative) pathways. Conversely, cell growth and proliferation require increased glycolytic ...

2011

Palladium Alkynyl and Allenylidene Complexes: Very Efficient Precatalysts for C-C Coupling Reactions

Oxidative addition of BrC CC(=O)O-menthyl (1a) to [Pd(PPh3)(4)] affords the alkynyl complex trans-[Br(PPh3)(2)Pd-C CC(=O)O-menthyl] (2a). Subsequent reaction of 2a with trifluoroacetate gives trans-[(F3CCOO)(PPh3)(2)Pd-C CC(=O)O-menthyl] (3a). Reaction of ...

2011

Evidence of lipid peroxidation and protein phosphorylation in cells upon oxidative stress photo-generated by fullerols

László Forró, Andrzej Sienkiewicz, Sylvia Jeney

An oxidative stress (OS) state is characterized by the generation of Reactive Oxygen Species (ROS) in a biological system above its capacity to counterbalance them [1]. Exposure to OS induces the accumulation of intracellular ROS, which in turn causes cell ...

Elsevier2010

Oxidative transformation of micropollutants during municipal wastewater treatment: Comparison of kinetic aspects of selective (chlorine, chlorine dioxide, ferrate(VI), and ozone) and non-selective oxidants (hydroxyl radical)

Urs von Gunten, Yun Ho Lee

Chemical oxidation processes have been widely applied to water treatment and may serve as a tool to minimize the release of micropollutants (e g pharmaceuticals and endocrine disruptors) from municipal wastewater effluents into the aquatic environment The ...

2010

Inactivation of MS2 coliphage in Fenton and Fenton-like systems: role of transition metals, hydrogen peroxide and sunlight

Tamar Kohn, Andrzej Sienkiewicz, Jessica Ivana Nieto Juarez

The inactivation of coliphage MS2 by iron- and copper-catalyzed Fenton systems was studied to assess the importance of this process for virus inactivation in natural systems and during water treatment by advanced oxidation processes. The influence of H2O2 ...

American Chemical Society2010

Oxidation of Virus Proteins during UV(254) and Singlet Oxygen Mediated Inactivation

Tamar Kohn, Jonathan Paz Montoya, Krista Rule Wigginton

Despite the widespread use of UV254 irradiation and solar disinfection for water treatment, little is known about the photochemical pathways that lead to virus inactivation by these treatments. The goal of this study was to identify reactions that occur in ...

2010

Mitochondrial matrix pH controls oxidative phosphorylation and metabolism-secretion coupling in INS-1E clonal beta cells

Kristina Schoonjans, Andreas Wiederkehr, Chikage Mataki

Glucose-evoked mitochondrial signals augment ATP synthesis in the pancreatic β cell. This activation of energy metabolism increases the cytosolic ATP/ADP ratio, which stimulates plasma membrane electrical activity and insulin granule exocytosis. We have re ...

2010

Advanced oxidation of the surfactant SDBS by means of hydroxyl and sulphate radicals

Urs von Gunten, Silvio Canonica

The objective of the present study was to characterize the removal of the model surfactant sodium dodecylbenzene sulfonate (SDBS) from waters using several radical-based water treatment processes. Fenton's reagent has shown high efficacy in surfactant degr ...

2010

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