Oxygen balance in micro stabilization ponds

Summary In a continuous flow of domestic sewage, the effect of various environmental conditions on the oxygen balance of an algal-bacterial culture was studied in 2 microponds in series. The relation between the size of the algal population and the amount of photosynthetic oxygen was discussed.The efficiency of the symbiotic system in relation to photosynthetic oxygenation was elucidated in terms of two oxygenation factors. One is concerned with the consumption of oxygen by the existing flora and the other with the BOD of the influent substrate.Prof. of Botany, Fac. of Science.Lecturer in Sanitary Biol., Fac. of Engineering.     

A monoclonal antibody with binding and inhibiting activity towards human pancreatic carcinoma cells

Summary The murine monoclonal antibody (MAb) BW 494 was characterized in relation to its tissue specificity, the epitope recognized, in vitro and in vivo radiolocalization and its potential to mediate antibody dependent cellular cytotoxicity (ADCC) and complement mediated cytolysis (CMC). The MAb defined carbohydrate epitope located on a >200 k daltons glycoprotein was mainly expressed on the majority of well differentiated adenocarcinomas of the pancreas. Furthermore, the epitope is accessible to MAb BW 494 in vivo, allowing an enrichment of radioactive antibody at the tumor site in nude mice. Additionally, MAb BW 494 is able to use human peripheral blood lymphocytes as effector cells for ADCC reactions against appropriate tumor target cells in vitro. In contrast, the antibody does not mediate human or rabbit CMC.     

Zwei neue germacranolide aus Artemisia argentea

The aerial parts of Artemisia argentea afforded, in addition to known compounds (arborescin, artemetin, sitosterol and lirioresinol-B-dimethyl ether), two new germacranolides, closely related to ketopelenolide, also isolated from an Artemisa species. The structures were elucidated by intensive ¹H NMR studies and by some chemical transformations.