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At least 847 records · Page 47Linked to original sources
PubMed1977

Local activation of blood coagulation by polyester prostheses implanted into defects of the abdominal aorta of dogs.

An 8 cm long Dallon prosthesis was implanted into defects of the abdominal aorta of dogs, and the following changes were found: the blood flow through the vascular prosthesis induced a shortening of the blood clotting time and the heparin-thrombin time and a slight increase in the prothrombin consumption. It has a favourable effect of the sealing of pores in the prosthesis and covering its internal surface with a fibrin membrane.

Animals↗
PubMed1976

Studies on the biodegradation of nonionic surfactants applied in the polyester fiber industry. I. Activated sludge bacteria degrading the surfactants.

The paper presents characteristics of 76 strains of bacteria capable of utilizing nonionic surfactants Cirrasol FP, Cirrasol SF 200 and Cirrasol TCS as the source of carbon. The strains were isolated from two activated sludges adapted to the purification of wastes containing the above compounds at concentration 150--200 mg/l. The isolated strains belonged to the genera: Achromobacter, Alcaligenes, Arthrobacter, Flavobacterium, Mycobacterium, Nocardia, Pseudomonas and Xanthomonas. With load 0.11 mg surfactant/mg d.w./day bacteria belonging to Alcaligenes were dominating. With load 0.18--0.31 mg surfactant/mg d.w./day microorganisms were dominated by Pseudomonas. The highest intensity of degradation of the studied surfactant was shown by species: Alcaligenes viscolactis, Nocardia blackwellii and Pseudomonas rathonis.

Bacteria↗
PubMed1976

Studies on the biodegradation of nonionic surfactants applied in the polyester fiber industry. II. Effect of activated sludge load on microorganisms.

The effect of selected nonionic surfactants Cirrasol FP, Cirrasol SF 200 and Cirrasol TCS on activated sludge organisms purifying wastes from the polyestre fibre industry was studied. The toxic effect of the mentioned surfactants towards bacteria, protozoa, rotifera and nematoda occurred at loads exceeding 0.32 mg surfactant/mg d.w./day and in periods of large fluctuations of the employed loads. Morphological changes of activated sludge flocs are also observed in similar conditions.

Adaptation, Physiological↗