Time-course of spontaneous activity measured at the single cell level with 2-photon imaging, plotted as mean ΔF/F across all cells.
For the latter measure, top-down components of beat perception were isolated from bottom-up processes driven by acoustic input by contrasting neural activity measured at the beat frequency in response to the syncopated vs. unsyncopated rhythm.
The activity measured at various time intervals was corrected for background counts.
Secondly, a larger-scale noise estimator derived from activity measured at the geographically closest magnetic observatories to the sample point.
The formazan crystals so formed were dissolved in Dimethyl sulfoxide (DMSO) and optical activity measured at 570 nm.
(d), the residual activity, measured at 50°C, was determined after the enzyme had been incubated in various buffer solutions, pH 6 10, at 4°C for 24 h.
Secondly, we employ a larger-scale noise estimator (the 'LAVA' index) derived from the activity measured at the geographically closest magnetic observatories to the sample point.
Hyperoxia, however, did not affect total hippocampal SOD activity measured at 6 and 24 hours, indicating that the mRNA responses were necessary to maintain the anti-oxidant enzyme activity after oxidative stress.
We observed that unfractionated rat brain extract incubated with substrate at pH 6.0 yielded 12 times the quantity of angiotensin I as incubations at pH 7.4, but the enzyme activity measured at pH 6 was not primarily due to renin.
