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Biomedical subjects

K Aida

Publications and source records attributed to K Aida.

At least 181 records · Page 10Linked to original sources
PubMed1979

A new method of urea removal using urease and expanded polytetrafluoroethylene membrane.

A new method for urea removal using a gas membrane is introduced along with some preliminary results. The membrane used was expanded polytetrafluoroethylene (E-PTFE) which is highly permeable to gaseous substances, while at the same time it is highly resistant to water permeation. In in vitro experiments using 10 mmol/L ammonia solution it was revealed that the single-pass reduction rate was approximately 95% at 30 degrees C at a flow rate of 200 ml/min. In animal experiments using four dogs, the extraction rate of urea was 40.4 +/- 4.4% after four hours of dialysis using 5 L dialysate. However, elevation of blood ammonia was observed in all dogs tested. Removal of ammonia by means of a gas membrane is considered to be feasible and has the possibility of being used for maintenance hemodialysis in combination with urease and charcoal.

Ammonia↗
PubMed1979

Chitin-binding hemagglutinin produced by Conidiobolus strains.

A hemagglutinin was produced by strains of Conidiobolus which also produce beta-N-acetylglucosaminidase. Activity of the hemagglutinin was inhibited by D-glucosamine, N-acetyl-D-glucosamine, D-mannosamine, and beta-N-acetyl-D-glucosaminides but not by D-glucose, D-mannose, and alpha-N-acetyl-D-glucosaminides.

Acetylglucosaminidase↗
PubMed1979

Exohemagglutinins: new products of vibrios.

A number of vibrio strains isolated from marine water produced high units of phytohemagglutinin-like agglutinins. Sugar specificity of the hemagglutinins was different from that of the sugar-binding bacterial toxins and that of the sugar-binding pili on the bacterial cell surfaces.

Agglutinins↗
PubMed1977

Exocellular mucopolysaccharide closely related to bacterial floc formation.

A bacterium isolated from activated sludge formed a visible floc and also produced an exoenzyme that could bring about deflocculation. Scanning electron microscopic examination revealed that the cells were embedded in a film mesh in the floc, which disappeared after treatment with the deflocculating enzyme. Polysaccharides isolated from the floc were fractionated into three fractions by diethylaminoethyl-Sephadex A-25 column chromatography, whereas those from the free cells were fractionated into only two fractions. The missing fraction was a mucopolysaccharide composed of glucosamine, glucose, mannose, galactose, and rhamnose and was hydrolyzed to oligosaccharides by the deflocculating enzyme. The other two fractions were resistant to the enzyme. These results show that the mesh structure of the floc is dependent on a mucopolysaccharide hydrolyzed by the deflocculating enzyme.

Bacteria↗