Electrical field-flow fractionation of proteins.

Protein separation has been achieved by electrical field-flow fractionation, a heretofore unrealized separation technique. Some advantages of this method relative to electrophoresis are the low voltage required, the lack of adverse heating and support effects, and the existence of the method as an elution technique. A comparison of theoretical and experimental retention shows good agreement.

[Intraluminal duodenal diverticulum - apropos of 3 cases]. / Divertículo intraluminal del duodeno a prop8osito de tres observaciones.

1. Three patients with I.D.D. are reported and their clinical, radiological and endoscopic manifestations are presented as well as our experience in the treatment of those patients. 2. Diagnosis was established in all cases by radiological studies. These studies revealed the diverticula to be located at the 2 o. part of the duodenum and the appearance of the classic radiolucnt line around the diverticula. 3. Surgical treatment is not required as long as complications are absent. Two patients had to be operated and resection of the diverticula was performed in one case. 4. Even as this condition is considered to be very rare, indeed, it is advisable to look for it in those adults whose clinical manifestations as bleeding or vomiting, can't be explained otherwise.