A relationship between callose and ectodesmata in epidermal cells of Allium cepa L.

The outer wall of adaxial epidermal cells of onion bulb scales shows punctate callose deposits. The abundance of these callose deposits is highly variable, and seems to correlate with the distribution of ectodesmata. It is proposed that callose is involved in the regulation of ectodesmata as a waterflow regulator and/or molecular filter, thus influencing the cell-environment interaction.

Clinical experiences with recurrences of Bell's palsy.

In a retrospective study of 2568 patients with peripheral facial palsies seen during a 10-year period, 106 (8.2%) of 1293 patients (50.4%) with Bell's palsy suffered a recurrence.

Calculation of electron beam dose distributions for arbitrarily shaped fields.

A method for the calculation of absorbed dose distributions of arbitrarily shaped electron beams is presented. Isodose distributions and output factors of treatment fields can be predicted with good accuracy, without the need for any dose measurement in the actual field. A Gaussian pencil beam model is employed with two different pencil beams for each electron beam energy.

Dose calculations for arbitrarily shaped electron beams.

A method for the calculation of absorbed dose distributions of arbitrarily shaped electron beams is described. Isodose distributions and the output factor of a newly designed treatment field can be predicted with good accuracy, without the need for any dose measurement in the actual field. Two different Gaussian pencil beams are used as building elements for the treatment beams of each electron energy.