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Full-Text Articles in Physical Sciences and Mathematics
Dendrimer Modified Silica Nanoparticles As Fluorescent Chemosensors For The Detection Of Copper And Cyanide Ions, Alicia Luhrs
Dendrimer Modified Silica Nanoparticles As Fluorescent Chemosensors For The Detection Of Copper And Cyanide Ions, Alicia Luhrs
Master's Theses
A series of silica nanoparticle-based fluorescent chemosensors were synthesized for the sensitive and selective detection of Cu2+ ions in aqueous solution and subsequent CN- ion detection. Silica nanoparticles (SNP) were modified with branching polyamidoamine (PAMAM) dendrimers, which function as selective turn-off Cu2+ ion chelators and platforms for the attachment of rhodamine isothiocyanate (RITC) or fluorescein isothiocyanate (FITC) fluorescent dyes. In the presence of Cu2+ ions, the emission of the fluorescent dye is quenched by Forster resonance energy transfer (FRET) and is dependent upon dendrimer generation, pH, fluorescent dye, and surface charge. The quenching effectiveness was analyzed …
An Fe (Iii) - Initiated Oxidase Reaction With Ferroxidase-Ii, Glenn Alexander Hegamyer
An Fe (Iii) - Initiated Oxidase Reaction With Ferroxidase-Ii, Glenn Alexander Hegamyer
Master's Theses
A reaction involving iron as an intermediary electron carrier for the coupling of electron transfer from an endogenous substrate to ferroxidase-I has been proposed.
The enzymic nature of the reacti on has been established and studies with iron chelating agents have demonstrated the involvement of Fe(III). The kinetic parameters of ferroxidase-11 with Fe (lll) were found to be quite similar to those previously established for Fe(Il). The participation by the copper associated with ferroxi dase-11 was ascertained by use of the copper chelating agent, diethyl -di thio-carbamate .
A variety of substances normally found in blood were surveyed as possible …
The Chelation Of Cu(Ii) With 1, 3-Bis(Tris(Hydroxymethyl)Methylamino)-2-Propanol And 1, 3-Bis (2-Hydroxyethylamino)-2-Propanol, David Andrew Jackson Jr.
The Chelation Of Cu(Ii) With 1, 3-Bis(Tris(Hydroxymethyl)Methylamino)-2-Propanol And 1, 3-Bis (2-Hydroxyethylamino)-2-Propanol, David Andrew Jackson Jr.
Master's Theses
The chelating agent 1, 3-bis(2-hydroxyethylamino)-2-propanol dihydrochloride was prepared and preliminary examinations of the Cu(ll) and Fe(lll) complexes were carried out spectrophotometrically. This dihydrochloride as well as 1, 3 bis(tris(hydroxymethyl)methylamino)-2-propanol dihydrochloride. were converted from the chloride salts to their corresponding ammonium bases. The conversion was carried out by passing an aqueous solution of each chloride salt through an ion exchange column containing Amberlite XE-78 resin.
Solutions of these bases were standardized for use in potentiometric titration&. Each ammonium base was titrated with standard perchloric acid at 20°C, 30°C, and 40°C. The dissociation constants. were calculated using these data. Aqueous solutions of …