Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 91 for “"Hydrogen peroxide (H2O2)"”.
-
The role of melanin production in the survival of Vibrio cholerae in the marine environment
… against exogenous stresses, particularly hydrogen-peroxide (H2O2).
-
ROLE FOR HYDROGEN PEROXIDE DURING ABIOTIC AND BIOTIC STRESS SIGNALING IN PLANTS
… reactive oxygen species (ROS). ROS, such as hydrogen peroxide (H2O2), are now also considered to be important signal molecules that regulate the defense response of plants to stress. In this thesis, different strategies were pursued to identify genes that are involved in the stress response …
-
SYNTHESIS OF SMALL MOLECULE PROBES FOR PROTEIN SULFENIC ACIDS
Hydrogen peroxide (H2O2) and its metabolites participate in cellular redox homeostasis and have become well documented in recent years as messengers in signal transduction. One important mechanism by which redox-based signaling happens is reversible oxidation of cysteine residues forming cysteine …
-
The Mechanism of Oxygen and Nitric Oxide Toxicity in Escherichia Coli
… oxide (NO) greatly accelerates the rate at which hydrogen peroxide (H2O2) kills E. coli. The goal of this study was to determine the mechanism of this synergism. The filamentation of the dead cells, and their protection by cell-permeable iron chelators, indicated that NO/H2O2 killed cells by …
-
A high-performance liquid chromatography system with Fenton's reagent for detection of gas-phase hydrogen peroxide
… HPLC method for analysis of gas-phase hydrogen peroxide (H2O2) has been developed. This method relies on conversion of sodium salicylate to dihydroxybenzoic acid, sodium salts by using Fenton's reagent (a mixture of H2O2 and ferrous iron) under the proper conditions. Hydroxyl radicals …
-
Plasma-water interface reactions caused by positive corona and glow discharges
… various reactive species such as O, OH, HO2, H2O2 and O3 in water. Plasma-water interface reactions are one of the core challenges in this field since it involves multiple physical and chemical processes leading to complex mechanism of mass/energy transfer and reactive species production at …
-
PATHOGENIC ROLE OF PHOSPHODIESTERASE TYPE 5 UPREGULATION IN CARDIAC ISCHEMIA/REPERFUSION INJURY
… a subset of hearts were perfused with 100 µM hydrogen peroxide (H2O2). Expression and activity of PDE5, pPDE5, and cGMP-dependent protein kinase (PKG) were measured by Western blots and spectrophotometric assay. The results show that ischemia and I/R significantly increased expression of PDE5. …
-
Pneumatic battery : a chemical alternative to pneumatic energy storage
… allows energy to be stored chemically in a Hydrogen Peroxide (H2O2) solution and released when the solution decomposes, producing oxygen gas. This decomposition is sped up with the aid of a platinum catalyst. A mechanical negative feedback system regulates the exposure of the catalyst, …
-
Nox4 mediates metabolic stress responses
… other Nox members as it predominantly produces hydrogen peroxide (H2O2), an effective signaling molecule. Here we demonstrate an essential role for Nox4 in mediating the beneficial effects of exercise. This work will contribute to our understanding of physiological ROS and their downstream …
-
STRUCTURAL AND CATALYTIC FEATURES AFFECTING INACTIVATION OF TYPICAL 2-CYS HUMAN PEROXIREDOXINS 2 AND 3
… catalytic cycle. This redox cycling facilitates hydrogen peroxide (H2O2) based cell signaling, protects cells from oxidative stress and inhibits apoptosis. There are four members of this class with disparate subcellular distributions: Prx1, Prx2 (both in the cytoplasm), Prx3 (mitochondria) and …
-
Effects of Acute Heat and Oxidative Stress on the Hepatic Expression of Orexin and Its Related Receptors
… the effects of heat and oxidative stress using hydrogen peroxide (H2O2) and 4-hydroxynonenal (4-HNE) on the hepatic expression of ORX and ORXR1/2 in the avian species. Overall, heat stress significantly down regulated the expression of ORX, and ORXR1/2 mRNA and pro1tein in quail liver and LMH …
-
Neuroprotection of AG490 in Oxidative Stress-induced Neuronal Death
… death against various oxidative stimuli, such as hydrogen peroxide (H2O2), L-buthionin-S,R-sulfoxamine (BSO), N-methyl-D-aspartic acid (NMDA), and arachidonic acid (AA). Particularly, AG490 completely blocked H2O2-induced neuronal death. To explore the protective mechanism of AG490, the …
-
Akt2 Redox-regulation in Breast Cancer and Diabetes
… Akt2 was found to be uniquely regulated by hydrogen peroxide (H2O2), an established secondary messenger molecule. Akt2 kinase activity is reversibly inhibited by H2O2. This isoform has been implicated in the regulation of glucose homeostasis with Akt2 knockout mice displaying a type 2 …
-
Evaluating Methods of Improving Recovery of Sub-lethally Injured Salmonella in Low Moisture Foods Treated with Antimicrobial Gas
… as fumigation with chlorine dioxide (ClO2) or hydrogen peroxide (H2O2) gas and recovery methods are needed. Recovery methods should accurately quantify all viable cells, even those injured, to prevent overestimation of treatment effectiveness. This study was performed to determine the effect of …
-
The synthesis of stable nanotags for the detection of biomolecules using surface enhanced Raman scattering
… (ABTS) and in the presence of hydrogen peroxide (H2O2). This yields a colorimetric response which can be characterised using ultraviolet-visible (UV-vis) spectroscopy, Resonance Raman scattering (RRS) and surface enhanced resonance Raman scattering (SERRS). Nanozymes have been …
-
ROS regulation of axonal mitochondrial transport
… oxidative stress conditions. <em>In vitro</em>, hydrogen peroxide (H2O2) diminished the percentage of moving mitochondria, the mitochondrial length and inner membrane potential. <em>In vivo</em>, ROS inhibited specifically mitochondrial axonal transport, primarily due to reduced flux and …
-
Evaluation of Anti-cancer effect of a Novel Formulation from Umbilical Cord Blood Stem CellDerived Exosomes and Retinoic acid as a potential therapeutic candidate against Malignant Melanoma
… (***p<0.001) against oxidative stress induced by hydrogen peroxide (H2O2) and UVA+B (1.2mW/cm2). Moreover, RA rescued DNA damage caused by oxidative stress in both healthy and melanoma lymphocytes. However, in both melanoma cell lines, RA aggravated the genotoxic effect (***p<0.001). Similar …
-
Treatment of 2,4-dichlorophenol using soybean peroxidase.
In the presence of hydrogen peroxide (H2O2), soybean peroxidase (SBP) extracted from the soybean seed coat catalyzes the polymerization of various chlorinated phenols from wastewater. The resulting polymer precipitates from solution and can be removed through a simple sedimentation or filtration …
-
The Role of Metal Ions and Reactive Oxygen Species in beta-Amyloid Aggregation and Toxicity and Their Relevance to Alzheimer's Disease.
… responsible for the toxicity of the peptide as hydrogen peroxide (H2O2) has been found to be produced during the early stages of aggregation. This study investigates the generation of H2O2 by Abeta during the process of aggregation and presents evidence supporting the hypothesis that some form …
-
Novel methods for identification and quantification of iron fortificants in cereal flours
… thiocyanate (KSCN) with HCl with and without hydrogen peroxide (H2O2), we identified EFe, ferric, and ferrous fortificants. NaFeEDTA, FePP, FeSO4, FeCit, and FeFum were identified based on their solubility in water using ferrozine with and without ascorbic acid (ASC). An alternative method for …
Page 1 of 5