[Preparation for elective colon surgery using the mannitol-ceftriaxone method].

The study includes 450 patients undergoing elective colorectal surgery. Patients were divided in three groups. 140 patients were prepared with conventional enema and purgatives and a Neomycin-metronidazole prophylaxis.

Magnetic circular dichroism studies of the active site structure of hemoprotein H-450: comparison to cytochrome P-450 and sensitivity to pH effects.

Ferric, ferrous and ferrous-CO hemoprotein H-450 from rat liver have been examined with magnetic circular dichroism spectroscopy under alkaline (pH 8.0) and acidic (pH 6.0) conditions.

Malignant fibrous histiocytoma of the mediastinum.

A case of malignant fibrous histiocytoma in the right postero-superior mediastinum in a 43-year-old male patient is presented. He was operated on and a part of the tumor including the infiltrated second segment of the lung was resected. At reoperation, the great vessels were found infiltrated by the tumor and radical exstirpation could not be carried out.

Anorectal sarcomas.

The authors report on their observations of nine patients with anorectal sarcoma. They agree with others that best results can be expected from radical surgery. Even in operable patients anorectal sarcomas have a worse prognosis than other malignant lesions in the same region.