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.
Biodegradation is a process where something breaks down into simple compounds as a result of the action of microorganisms (like bacteria, fungi, or algae).The term biodegradation is actually a contraction, short for biotic degradation.. Something is biodegradable if it can be broken down by this kind of process.In order to say that something biodegrades, it therefore has to meet the following requirements: 1  it has to break down (this is simply degradation).ecause biodegradation requires microorganism to do something to a material, usually the material has to be broken up into smaller pieces first. As a result, most biodegradable materials become biodegradable after the action of another kind of degradation.