Of the common causes for exudative pleural effusions, parapneumonic effusions have the highest diagnostic priority. Even in the face of antibiotic therapy, infected pleural effusions can rapidly coagulate and organize to form fibrous peels that might require surgical decortication.
Retrogradation is the landward change in position of the front of a river delta with time.etrogradation is the landward change in position of the front of a river delta with time.
Â· just now. Report Abuse. In the fields of histology, pathology, and cell biology, fixation is a chemical process by which biological tissues are preserved from decay. Fixation terminates any ongoing biochemical reactions, and may also increase the mechanical strength or stability of the treated tissues..... just now. Report Abuse. In the fields of histology, pathology, and cell biology, fixation is a chemical process by which biological tissues are preserved from decay. Fixation terminates any ongoing biochemical reactions, and may also increase the mechanical strength or stability of the treated tissues.