The present invention primarily concerns certain 4-alkyl pyridines of the following formula ,wherein R is C8-C12 alkyl, odiferous substance mixtures and aromatic substance mixtures containing these 4-alkyl pyridines, the respective uses thereof as an odiferous or aromatic substance and corresponding perfumed products. The slurry is cast in a mold, and the polymer is ionically cross-linked. A clock control block is configured to produce output multi-clock signals by selectively outputting one among the interpolated phase clock signal groups using a digital control signal having a plurality of bits which are produced based on phase differences of the multi-phase clock signals. The set of path edges includes valuations that are implicitly represented so as to inhibit an undesired explosion in the valuations that would hinder the act of analyzing.