From 1982 to 1987, 194 patients with 196 primary traumatic anterior shoulder dislocations were treated in our hospital. One hundred and sixty-six patients with 168 shoulder dislocations (87%) were available for study at follow-up an average of 4 years after treatment. The most important prognostic factor in relation to recurrence was the age of the patient at the time of the primary dislocation. The highest recurrence rate was found in patients of 30 years and younger (64%). Athletes in this age group had no worse a prognosis as to recurrence than non-athletes. A fracture of the greater tuberosity improved the prognosis significantly (P less than 0.01). Neither the presence of a Hill-Sachs lesion nor the period of immobilization influenced the recurrence rate in patients aged 30 years and younger.

The lipopolysaccharide of free-living Rhizobium leguminosarum was isolated and purified, and its homogeneity was determined by gel electrophoresis and, after mild acid degradation, by gel filtration. On electrophoresis, two molecular species were observed. After acid degradation and gel filtration, three components could be isolated: one was very rich in glucose, one contained 2-O-methylfucose, fucose, mannose, galactose, glucose, L-glyCer0-Dmanno-heptose, 2-keto-3-deoxyoctonic acid, L-alanine, quinovosamine and uronic acids, and the third component consisted of low molecular weight material. In the lipid A fraction, D-glucosamine, P-hydroxymyristic acid, /I-hydroxypalmitic acid and P-hydroxystearic acid were detected as major components. The phosphorus content was low. No major chemical differences were observed in the neutral sugar and fatty acid compositions of the lipopolysaccharides isolated from bacteria and bacteroids. The lipopolysaccharide of bacteroids was rapidly lost during isolation from the nodules and on dialysis, and behaved anomalously during ultracentrifugation.

We studied the modulation of the number of membrane-bound naphthaleneacetic acid (NAA)-binding sites during the growth cycle of tobacco cells in batch culture. Both cell number and specific NAA-binding increased exponentially, but at different rates and for different periods. This caused a characteristic modulation of the number of binding sites per cell during the growth cycle: During the first day of the lag phase this number decreased; in the exponential phase it rose markedly, and in the stationary phase it was constant.

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