Beam pulse structure and dose rate as determinants for the flash effect observed in zebrafish embryo.

Background And Purpose: Continuing recent experiments at the research electron accelerator ELBE at the Helmholtz-Zentrum Dresden-Rossendorf the influence of beam pulse structure on the Flash effect was investigated.

Materials And Methods: The proton beam pulse structure of an isochronous cyclotron (UHDR) and a synchrocyclotron (UHDR) was mimicked at ELBE by quasi-continuous electron bunches at 13 MHz delivering mean dose rates of 287 Gy/s and 177 Gy/s and bunch dose rates of 10Gy/s and 10 Gy/s, respectively. For UHDR, 40 ms macro pulses at a frequency of 25 Hz superimposed the bunch delivery.

Interactions between mezlocillin and sisomicin in vitro and in patients with normal and various degrees of impaired renal function.

During in vitro experiments using pooled human plasma at 37 degrees C, sisomicin alone showed only a small loss of activity of 12% in 24 hr. Incubation with 80 micrograms/ml mezlocillin did not alter the rate of inactivation. But, after the addition of 300 micrograms/ml mezlocillin to either 5.

[Effect of diffusion potentials and various stomach regions on the behavior of the potential difference after pentagastrin].

Junction potentials at the tip of a 0.15 M NaCl- and a 3 M KCl-flowing bridge dependent on the surrounding electrolyte solution were measured and calculated. There was a close correlation between the calculated and measured junction potentials.