Solution- and gas-phase study of binding of ammonium and bisammonium hydrocarbons to oxacalix[4]arene carboxylate.

Oxacalixarenes represent a distinctive class of macrocyclic compounds, which are closely related to the parent calixarene family, offering binding motifs characteristic of calixarenes and crown ethers. Nevertheless, they still lack extensive characterization in terms of molecular recognition properties and the subsequent practical applicability. We present here the results of binding studies of an oxacalix[4]arene carboxylate macrocycle toward a variety of organic ammonium cationic species.

Prostatitis in benign prostatic hyperplasia: a histological, bacteriological and clinical study.

The paper deals with the incidence of prostatitis in benign prostatic hyperplasia (BPH) and its effect on the postoperative course in the patients subject to the transvesical prostatectomy. The samples of urine and expressed prostatic secretion were bacteriologically analysed before the operation, and samples of urine on three occasions following the operation. Specimens of BPH tissue obtained by surgery were subjected to pathohistological and microbiological examination.

[Bronchogenic cysts of the upper mediastinum].

A case report of a congenital bronchogenic cyst in the upper mediastinum on the level of the thoracic aperture, which very likely communicates with the oesophagus, is presented. The embryogenesis, aetiopathogeny, diagnostics, location and histological structure of this rare case are discussed.