Influence of growth regulators and nitrogen on the number of endosperm cells in wheat grains from different positions on the ear.

The course of development of the endosperm in wheat grains from pot experiments after application of growth regulators and a varied N-supply was followed by an endosperm cell count. The maximum number of endosperm cells was reached within the third week after anthesis and remained constant at two further checking times for more than 30 days after anthesis. There was no effect of application of CCC and Ancymidol at the end of tillering on the maximum number of endosperm cells although the single grain weight was smaller than in the control.

[Bronchial atresia--a rare anomalia (author's transl)].

Report on three cases of bronchial atresia. Two patients had an atresia of a segmental bronchus with consecutive bronchocele and regional hyperinflation, one patient had an atresia of a lobar bronchus. The diagnosis is made by association of radiologic and bronchologic analysis.

[Spinal deformities and their mechanopathology in oarsmen (author's transl)].

Motional analysis of the spinal segments with an x-ray amplifyer and studies of mechanical stress in the spine at oarsmen show, that during the phase of driving through with the oars immersed, the direction of the resulting load in the spine is approximately vertical to the next vertebral body. While referring to the vertebral bodies the direction of the resulting load does not change essentially, the size of the load differs conspicuously during active motion. In rowing the quantity of stress in the spine is limited by the torque of the counterforce, the erector trunci.