Publication details

Adsorption of single-stranded and double-helical polyadenylic acid at the mercury drop electrode.


HANÁK Libor VETTERL Vladimír

Year of publication 1998
Type Article in Periodical
Magazine / Source Bioelectrochemistry and Bioenergetics
MU Faculty or unit

Faculty of Science

Field Biophysics
Keywords polyadenylic acid; adsorption; electrode double layer; differential capacitance;
Description The adsorption of polyadenylic acid (poly A) at mercury electrode in 0.1 M and 0.9 M NaCl at pH 5 and pH 8 was studied by electrochemical impedance spectroscopy. At room temperature the single stranded poly A (pH 8) yields a high tensammetric capacitance peak at -1.4 V vs. SCE. The peak is higher and narrower at low ionic strengths. The height of the peak decreases with increasing frequency at low ionoic strengths, while it is almost independent on frequencz at higher ionic strengths. With the double helical poly A (pH 5) only a small tensammetric peak is observed.
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