having more true SHA, also known as the flight-to-liquidity phenomenon. Additionally, we might have some institutional demand for gold by central banks or the government sector during turbulent times for purposes of strengthening current account
Authors:János Földessy, Éva Seress-Hartai, and Géza Szebényi
Korpás, L., A. Hofstra, L. Ódor, I. Horváth, J. Haas, T. Zelenka 1999: Evaluation of the prospected areas and formations. - In: Carlin gold in Hungary, Geologica Hungarica, Ser. Geol., 24, pp. 197 - 293
Authors:S. Gyepi-Garbrah, P. Šimon, and R. Šilerová
similarities and differences in the behaviour of two-dimensional (2D) self-assembled
monolayers (SAMs) on gold and corresponding three-dimensional (3D) SAMs on
gold of two alkanethiols of different chain lengths, hexadecanethiol (HDM)
and octadecanethiol (ODM) were investigated as a function of temperature.
Cyclic Voltammetry (CV) of the 2D SAMs and Differential Scanning Calorimetry
(DSC) of the 3D SAMs were used to study previously unexplained behaviour.
CV revealed two transition temperatures in both the HDM and ODM 2D systems.
In the DSC studies, both a lower and higher temperature transition was observed
in the 3D SAMs of HDM but only one temperature transition was observed in
the 3D SAMs of ODM. It was deduced that the lower temperature transitions
in the gold-alkanoate nanoparticles were related to interaction between the
methyl group chain ends. The lower temperature transition was observed in
the 3D system of HDM but not that of ODM because the curvature in the 3D system
that is absent in the 2D system reduces the interaction between the alkyl
chain ends due to a longer chain resulting in an increased distance between
the end groups. It was concluded that the lower transition temperature was
attributed to the disordering of the alkyl chains starting from the end closest
to the terminal groups.
The gold content of placer gold flakes and gold bearing ores has been determined by instrumental neutron activation analysis /INAA/ and radiochemical neutron activation analysis /RNAA/. It was discovered that significant errors result in the instrumental method for gold flakes as small as 10 mg due to sample self-absorption of neutrons during irradiation. Reliable results were obtained, for both ore samples and gold flakes, by dissolving the samples in aqua regia prior to irradiation.
Authors:Eudes Lorençon, Rodrigo G. Lacerda, Luiz O. Ladeira, Rodrigo R. Resende, André S. Ferlauto, Ulf Schuchardt, and Rochel M. Lago
significantly when the metal impurity of the sample increased. Iijima et al. [ 13 ] reported that SWNT can be purified by using gold nanoparticles deposited on carbonaceous soot followed by controlled oxidation with O 2 . An overall analysis of these reports
): Altın ile Hisse Senedi ve Enflasyon Arasındaki ılişki (The Relationship between Gold, Stocks and Inflation) . Atatürk Üniversitesi ıktisadi ve ıdari Bilimler Dergisi (Ataturk University Journal of Economics and Administrative Sciences) , 27 ( 1 ): 59