Anodic Stripping Voltammetry with Superimposed A.C. Potential

The combination of a. c. polarography with linear scan anodic stripping voltammetry has been investigated, employing a self‐constructed, phase discriminating a. c. attachment. The resolution and sensitivity of the method was compared with those obtainable, under similar experimental conditions, by plain anodic stripping voltammetry. Changes in the concentration of the supporting electrolyte and the presence of dissolved oxygen frequently affect the sensitivity and must be carefully controlled. The practical application of the method is illustrated by applying it to the determination of zinc in solutions and in a standard silicate sample.Peer Reviewedhttp://deepblue.lib.umich.edu/bitstream/2027.42/101760/1/196600035_ftp.pd

Multicentric myxoid liposarcoma: report of two cases

<p>Abstract</p> <p>Background</p> <p>Multicentric myxoid liposarcoma is a rather infrequent tumour that tends to behave aggressively.</p> <p>Case presentation</p> <p>We herein report two further cases of this tumour that have been managed in our Hospital. Both were young men with multiple sites of involvement at the moment of diagnosis and both have shown a bad prognosis with frequent recurrences after treatment and rapid death in one case.</p> <p>Conclusion</p> <p>We comment on the diagnosis of this entity and on the therapeutic options available for these patients.</p

Gold nanoelectrode ensembles for direct trace electroanalysis of iodide

A procedure for the standardization of ensembles of gold nanodisk electrodes (NEE) of 30 nm diameter is presented, which is based on the analytical comparison between experimental cyclic voltammograms (CV) obtained at the NEEs in diluted solutions of redox probes and CV patterns obtained by digital simulation. Possible origins of defects sometimes found in NEEs are discussed. Selected NEEs are then employed for the study of the electrochemical oxidation of iodide in acidic solutions. CV patterns display typical quasi-reversible behavior which involves associated chemical reactions between adsorbed and solution species. The main CV characteristics at the NEE compare with those observed at millimeter sized gold disk electrodes (Au-macro), apart a slight shift in E1/2 values and slightly higher peak to peak separation at the NEE. The detection limit (DL) at NEEs is 0.3 M, which is more than one order of magnitude lower than DL at the Au-macro (4 M). The mechanism of the electrochemical oxidation of iodide at NEEs is discussed. Finally, NEEs are applied to the direct determination of iodide at micromolar concentration levels in real samples, namely in some ophthalmic drugs and iodized table salt

Abraham model correlations for solute partitioning into o-xylene, m-xylene and p-xylene from both water and the gas phase

Article on Abraham model correlations for solute partitioning into o-xylene, m-xylene and p-xylene from both water and the gas phase

Correlation and prediction of solute transfer to chloroalkanes from both water and the gas phase

Article discussing research on the correlation and prediction of solute transfer to chloroalkanes from both water and the gas phase