Brigitte Wiesner

Learn More
The effect of energy metabolism on intracellular pH was studied in boar spermatozoa using nuclear magnetic resonance (NMR) spectroscopy and confocal microscopy with the pH-sensitive dye seminaphthorhodafluor (SNARF-1). Freshly ejaculated spermatozoa had a high adenylate energy charge (AEC=0.8), which decreased to 0.6 under aerobic conditions and to 0.2(More)
A theoretical investigation of the statistical difference between FM signals and narrow-band random noise has been completed. It was found that for most practical modulation conditions, the autocorrelation function of noise drops off more rapidly as a function of the time shift, T, than does that of an FM signal. This statistical difference can be used to(More)
The influence of maltose-modified poly(propylene imine) (PPI) dendrimers on dimyristoylphosphatidylcholine (DMPC) or dimyristoylphosphatidylcholine/dimyristoylphosphatidylglycerol (DMPC/DMPG) (3%) liposomes was studied. Fourth generation (G4) PPI dendrimers with primary amino surface groups were partially (open shell glycodendrimers - OS) or completely(More)
mean-square values of signal and noise at the principal points, when a sinusoid of constant amplitude E s and instantaneous frequency w plus an independent random-fluctuation S1S elf(t Sif Sin AMPLITUDE Sout Nif Nin LIMITER Nout Fig. X-1. Limiter with regenerative feedback. noise of total mean-square value Nif is applied across the if terminals. To start(More)
  • 1