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Full-Text Articles in Physical Sciences and Mathematics
The Chemistry Of Sf₅Br And Sf₅Cf=Cf₂ - Addition Reactions, Robin J. Debuhr
The Chemistry Of Sf₅Br And Sf₅Cf=Cf₂ - Addition Reactions, Robin J. Debuhr
Dissertations and Theses
Addition reactions of pentafluorosulfur bromide (SF5Br) with fluoroolefins were studied. Three new adducts were prepared, SF5CHFCHC1Br, SF5CH2CH(CF3)Br, SF5CHFCFC1Br. SF5Br and CFC1=CHC1 yielded a small amount of product but attempts to add SF5Br to CF2=FCOF were unsuccessful.
The mechanism for these addition reactions seems to involve a free radical addition pathway. Steric factors seem to be important in determining whether SF5Br will add to fluoroolefins.
The new compounds, SF5CF(CF3)COF and SF5CF(CF3 )CONH2 have …
Determination Of Mercury By Photoacoustic Spectroscopy, Robert Allen Cary
Determination Of Mercury By Photoacoustic Spectroscopy, Robert Allen Cary
Dissertations and Theses
A new detector for atomic spectroscopy was developed based on the photoacoustic principle. A simple system was constructed based on this detector and applied to the trace analysis of mercury. The detection limit was found to be about 0.2 μg/1 of mercury with a one milliliter sample.
Characterization Of Trace Iron Species In Natural Water, James Robert Johnson
Characterization Of Trace Iron Species In Natural Water, James Robert Johnson
Dissertations and Theses
The distribution and speciation of trace metals in natural waters is only slightly, at best, understood. Interactions with organic substances can effectively distribute the metals throughout many ill-defined physical and chemical. To better comprehend the complexity of metal-organic interactions this work focused on the delineation of trace iron species present in a natural system. The separation of Fe(II) and Fe(III) was successfully accomplished using a variation of an ion exchange method involving resin-loaded filter paper. The quantitation of the various iron species was determined using linear scan voltammetry and atomic absorption. The total iron concentration, determined as the sum of …
Involvement Of Hemerythrin Sulfhydryl Groups In Heavy Atom Binding And Subunit Interactions, Suzanne Elizabeth Clarke
Involvement Of Hemerythrin Sulfhydryl Groups In Heavy Atom Binding And Subunit Interactions, Suzanne Elizabeth Clarke
Dissertations and Theses
Hemerythrin is a respiratory protein found in the erythrocytes of certain marine invertebrates. Structures have been obtained by x-ray crystallography for hemerythrins from Phascolopsis gouldii (P. gouldii) and Themiste dyscritum (T. dyscritum). Since many proteins are inactivated upon binding heavy metals such as mercury, an investigation of mercury-protein interactions in this protein was undertaken. In order to understand the nature of heavy-metal protein interactions in T. dyscritum it was necessary to identify the metalloprotein ligands since neither the liganding amino acid residues nor the geometry of the mercury complexes could be identified in the crystallographic studies.