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Showing 1 to 19 of 19 for “"persulfate"”.
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Proteomics in Nasal Lavage Fluids from Persulfate Challenged Hairdressers
… airway symptoms e.g. asthma and rhinitis. Persulfate salts, which are oxidizing agents present in bleaching powder, are considered to be important causal agents for these symptoms. The underlying mechanisms are unclear and efficient tools for risk assessment and diagnosis are scarce. The …
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Synthesis of electrically conductive polypyrrole thin films via ammonium persulfate chemistry
Thesis (B.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1990.
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In Situ Oxidation of 1,4-Dioxane with Persulfate-Based Oxidation Activated by Iron Minerals
… sites. There is increasing attention paid to the persulfate-based activation method for in situ degradation of organic contaminants due to its high efficiency and low cost. Iron mineral-based remediation methods, such as siderite and natural aquifer geomedia, have been of sustained interest due to …
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Oxydation des isomères de dichlorobenzène à l'aide du persulfate de sodium soumis à une activation thermique
… molécule rémanente, le dichlorobenzène par le persulfate de sodium soumis à une activation thermique en milieu aqueux et en suspension de sol (teneur en solide de 10 %). Le persulfate a été étudié afin de documenter davantage son utilisation pour l'oxydation chimique des sols contaminés. En …
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Hydraulic and Electrokinetic Delivery of Remediants for In-situ Remediation
… investigated a novel approach of EK assisted persulfate delivery followed by electrical resistance heating (ERH) for persulfate activation for low permeability soil remediation. The study showed that EK delivered persulfate throughout the silt. The application of ERH was successfully able to …
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The Gas-Phase Oxidation of Cationic Bioanalytes via Ion/Ion Reactions
… via ion/ion reactions with periodate and persulfate anions. Methionine and tryptophan residues in simple polypeptides are selectively oxidized upon ion/ion reactions with periodate anion. The oxidative labeling of disulfide bonds is performed via ion/ion reactions and is used to identify …
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Encapsulation of particles using brittle coatings for subterranean applications
… was explored.;The viscosity-reducer was ammonium persulfate. Polyurethane and acrylate coatings were investigated. The coated particles were assessed for dissolution in water before and after being subjected to a compression test. Polyurethane-coated particles had a high leach prior to compression …
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REMOVAL OF EMERGING CONTAMINANTS FROM AQUEOUS SOLUTION BY OZONE -BASED PROCESSES
… of ozone with hydrogen peroxide and sodium persulfate were tested. For this study 1-4, dioxane, perfluorinated compounds (PFCs), N,N-Diethyl-metatoluamide, and three pharmaceuticals sulfamethoxazole, trimethoprim and carbamazepine have been selected. The effect of different process …
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Synthesis and characterization of conducting polymer nanostructures and their application in sensors
… aniline, HCl, a metal salt, and ammonium persulfate (APS) with a high pressure Hg lamp. The sensors are ready for operation after polymerization is complete, and no additional processing steps are necessary. These sensors showed faster and more intensity response to various organic vapors …
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Study of degradation of aflatoxins after sonication and their determination by HPLC-QqQ-MS
… παρουσία ανιόντων υπερθειϊκών αλάτων (persulfate anions) με ταυτόχρονη εφαρμογή υπερήχων. Για την ακριβή ποσοτικοποίηση και παρακολούθηση των επιπέδων αφλατοξινών χρησιμοποιήθηκε Υγρή Χρωματογραφία Υψηλής Απόδοσης σε σύζευξη με Φασματομετρία Μάζας Τριπλού Τετραπόλου με Ιοντισμό …
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Photosensitizer Loaded Contact Lenses As An Externally Stimulated Ophthalmic Drug Delivery System
… monomer solution (2-HEMA –EGDMA) using ammonium persulfate as the initiator of reaction for the formation of pHEMA hydrogel films. This delivery system showed 60% transmittance in the visible light region and 49% moisture content. In absence of laser, the in vitro release of free Eosin Y and …
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Functional application of iron-based metallic glasses in catalysis technology: Design and mechanism
… stability and reusability while activating persulfate as indicated by it being used for 30 times while maintaining an acceptable methylene blue (MB) degradation rate. The produced SiO2 layer on the ribbon surface expanded strongly from the fresh use to the 20th used, providing stable …
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Linking Microbial Community Structure to Methane Emissions from Stored Liquid Dairy Manure: Responses to Emission Mitigation Actions
… (up to ~28%) were observed when sodium persulfate, potassium permanganate, or their combination with sodium hypochlorite. In slurries treated with H2SO4, the abundance of methanogen populations was not impacted. In a subsequent pilot-scale study, the transcriptional activities of …
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Synthesis and Characterization of Solution and Melt Processible Poly(acrylonitrile-co-methylacrylate) statistical copolymers
… have been investigated. A low temperature, persulfate-metabisulfite initiated emulsion copolymerization was developed to synthesize poly(acrylonitrile-co-methyl acrylate) copolymers with acrylonitrile contents between 91-96 wt% with a molecular weight range of 100-200 kg/mol. This method was …
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Dynamic Modelling and Optimization of Polymerization Processes in Batch and Semi-batch Reactors. Dynamic Modelling and Optimization of Bulk Polymerization of Styrene, Solution Polymerization of MMA and Emulsion Copolymerization of Styrene and MMA in Batch and Semi-batch Reactors using Control Vector Parameterization Techniques.
… reactors. The initiator used in this work is Persulfate K2S2O8 and the surfactant is Sodium Dodecyl Sulfate (SDS). Reduction of the pre-batch time increases the Mn but decreases the conversion (Xn). The sooner the addition of monomer into the reactor, the earlier the growth of the polymer …
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Characterization of the molecular structure at modified polymer surfaces and polyphenylene sulfide/copper interphases
… foils. Chemical oxidation with alkaline persulfate solutions resulted in a needle-like surface oxide morphology, and bond strengths were also increased by this pretreatment method. Failure surface analysis and model interaction studies with PPS tetramer showed that the formation of excess …
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Investigation of methods for reducing aflatoxin contamination in distillers grains
… sodium hypochlorite, citric acid, and ammonium persulfate, were able to effectively (>86%) degrade aflatoxin with no substrate by heating at 90 ºC for 1 h with 1% (by weight) food additive solutions. A protective effect of the substrate was found for aflatoxin degradation in DWG and CDS. Citric …
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Biochemical characterisation of an alpha-amylase with pullulan hydrolase type III characteristics derived from a hot spring metagenomics library
The field of metagenomics has provided biotechnological researchers with new enzymes and insight into previously unknown enzyme families with potential for novel modes of action and being able to function under extreme conditions, such as extremes of temperature, acidity or alkalinity. The enzymes …