Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Haim Tobias"'
Publikováno v:
Analytical Chemistry. 81:8627-8631
Uranyl, UO(2)(2+), was electrochemically determined by a phosphate based self-assembled monolayer. A pretreated gold electrode with 2-mercatpoethanol was chemically modified by POCl(3) or POBr(3) to obtain the surface phosphate active sites. The diff
Publikováno v:
Journal of Electroanalytical Chemistry. 621:214-221
This work describes the attempts to develop a new type of modified electrode with high selectivity towards uranyl ions, UO22+. This goal has been addressed by binding derivatives of calix[6]arene, which is a macrocyclic molecule composed of six pheno
Publikováno v:
Analytical chemistry. 87(1)
In this work we report the sensitive electroanalytical detection of uranium(VI) in aqueous solutions. Uranium commonly exists in aqueous solutions in the form of its oxo ion, uranyl (U(VI)O2(2+)). The detection of uranyl has been accomplished by us t
Publikováno v:
Analytical Letters. 26:1819-1830
The selectivity and sensitivity of glucose measurements at carbon-paste based amperometric biosensors are greatly enhanced through the use of ruthenium-dispersed graphite particles. The improved performance is attributed to the substantial lowering o
Autor:
Joseph Wang, Haim Tobias, Robert S. Glass, Lúcio Angnes, Richard W. Pekala, Fung Ming. Kong, Rebecca A. Roesner, Keith C. Hong
Publikováno v:
Analytical Chemistry. 65:2300-2303
The electrochemical behavior and analytical performance of new vitreous carbon aerogel composite electrodes are described. These new composite electrodes rely on the unique open-cell nanostructure of aerogel materials, including their interconnected
Publikováno v:
Journal of Membrane Science. 75:213-220
The structural asymmetry of an apparently homogenous membrane cen be traced employing the nonlinearity of the permeat sorption isotherm. In this wortk the method is demonstrated with a dense wall carbon molecular sieve membrane.
Autor:
Haim Tobias, Abraham Soffer
Publikováno v:
Carbon. 23:281-289
Stepwise chlorination at 773 K of carbons and the resulting amounts of HC1 released can be interpreted by assuming that saturation of olefinic bonds by Cl2 occurs first. This is followed by exchange with the chemibound hydrogen and lastly by slight d
Publikováno v:
Carbon. 25:663-667
The chlorination of carbon cloth, both as-received and air activated, at 400°C produces carbons exhibiting increased water adsorption. At least two types of fixed chlorine are formed. Chemisorbed chlorine (ca. 7% by weight) is formed at 400°C and i
Publikováno v:
Nuclear Technology. 77:46-49
An electrochemical filter is used for efficient and fast removal of alumina particles suspended in heavy water circulating in a nuclear reactor. The process is based on electrostatic interactions between the charged colloids and an oppositely charged
Autor:
Abraham Soffer, Haim Tobias
Publikováno v:
Carbon. 23:291-299
There are surface double bonds on carbons which differ from the graphitic surface π-bonds in their chemical reactivity. They may be created by degassing prechlorinated or prehydrogenated carbon samples, besides their natural occurrence in nontreated