Moreover, PHA compositional changes occurred, where the hydroxyvalerate content had increased with the reduction in aeration rate. The PHA-accumulating microorganisms were found to have shifted closer to the surface of the granules when the aeration rate was reduced. The decrease in famine-period aeration rates accelerated the maximum PHA accumulation together with increase in granular size and settling ability. Results showed that regardless of the aeration rates used during famine period, all aerobic granules achieved a similar chemical oxygen demand removal and PHA content. The effects of variable aeration in the famine period on polyhydroxyalkanoate (PHA) accumulation in aerobic granules were investigated. This article is part of a Special Issue entitled SI: Prediction and Attention. Consequently, the vMMN is sensitive to the familiarity of the stimuli. Therefore, the differences in vMMNs to И and N deviants are not attributable to the physical difference between the И and N stimuli. Contrary to the first experiment, there was no significant difference between the vMNNs elicited by the two orientations. In the control experiment, the patterns were constructed solely from oblique lines, identical to the oblique lines of the N and И stimuli. To test the orientation-specific effect of the oblique lines on the vMMN, we introduced a control experiment. VMMNs emerged in both conditions peak latency of vMMN was shorter to the И deviant compared to the vMMN elicited by the N deviant. In a passive oddball paradigm, letters (N and И) were presented as either standard or deviant in separate conditions. Stimuli were patterns comprised of familiar (N) or unfamiliar (И) letters. The aim of the study was to investigate the effect of familiarity on the vMMN. The visual mismatch negativity (vMMN) component is regarded as a prediction error signal elicited by events violating the sequential regularities of environmental stimulation.
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