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Biomedical subjects

J Verran

Publications and source records attributed to J Verran.

9 recordsLinked to original sources
PubMed1992

Differentiated group professional practice in nursing: a demonstration model.

This innovative professional practice model was developed to assist in the redesign of the current nursing care delivery system in hospitals. It is expected that this model will facilitate the promotion of professional practice and that the results will be positive ones for patients, nurses, and hospitals. As Barry and Gibbons wrote recently, "Changing circumstances have become so compelling that it is no longer a question of whether familiar systems need redesigning, but rather how soon and by what means a different system will take place of the existing one."

Arizona↗
PubMed1984

Effect of dextranase and protease enzymes on aggregation of Streptococcus mutans: colorimetric and electron microscopic studies.

Sucrose-induced aggregation of Streptococcus mutans was ascertained by measuring the decrease in optical density of a cell suspension after 20 h incubation. The optimum sucrose concentration for the aggregation assay was 5% w/v, at an incubation temperature of 37 degrees C. Dextranase and protease enzymes were added to the suspensions to determine their effects on aggregation. Dextranase treatment decreased aggregation. Electron microscopic studies revealed a reduction in the amount of a diffuse coat which surrounded cells in the absence of the enzyme but in the presence of sucrose, and a degradative effect on fibrous extracellular material. Protease treatment of suspensions produced an increase in optical density; cell aggregates were not apparent. Electron microscopic studies revealed extensive cell damage and lysis. The success of these enzymes in decreasing aggregation would indicate a role in both caries and plaque control in vivo.

Colorimetry↗