Definitions for "BIOAVAILABILITY"
The rate and extent to which a drug is absorbed or is otherwise available to the treatment site in the body.
the amount of effect drug available for use by the body
The availability of a nutrient for microbially-mediated degradation or transformation. Typically, for a nutrient to be bioavailable, it must (1) be within physical proximity to the cell and (2) be dissolved in the aqueous phase, to be transported across the cell membrane. Thus, nutrients that are adsorbed to surfaces or sequestered into micropores that physically exclude cells are generally considered unavailable. Bioavailability should not be confused with recalcitrance, although distinguishing the two in the environment can be very difficult.
The degree to which toxic substances or other pollutants are present in sediments or elsewhere in the ecosystem to affect or be taken up by organisms. Some pollutants might be "bound up" or unavailable because they are attached to clay particles or are buried by sediment. The amount of oxygen, pH, temperature, and other conditions in the water can affect availability.
the ability of a substance to affect organisms.
Degree to which chemicals can be taken up by organisms.
Keywords:  radiotherapy, intestine
Intestine Radiotherapy
Incision Recombinant Incontinence Recurrence
A general term to describe the accessibility of contaminants to ecological populations. Bioavailability consists of: 1) a physical aspect related to phase distribution and mass transfer, and 2) a physiological aspect related to the suitability of the contaminant as a substrate.
Keywords:  pulmonary, indicative
Indicative Pulmonary
Keywords:  relative, see
See Relative Bioavailability.