Trimethylselenonium ion as a general excretory product
from selenium metabolism in the rat.
Assimilation efficiency of primary consumers is generally low and most of the material consumed is returned to the bottom sediment in the form of excretory products
, which are colonized by bacteria, depleting the [delta][sup.
GDH plays an important role in the elimination of nitrogenous excretory products
In the present study, many kinds of amino acids and nitrogen excretory products
are found both in male urine and in female urine.
Rather, online invective endlessly recycles body parts, excretory products
, and knee-jerk repulsiveness (like maggots).
Natural or manipulative field studies might use captive populations in seminatural enclosures or excretory products
collected (by use of metabolic chambers) from wild-caught animals in mark-recapture studies; the success of these studies will depend on the development of assays for infectious virus.
Many higher animals metabolize PAHs to water-soluble excretory products
and thus do not accumulate them.
Unless one organism uses the excretory products
of another, the biologically crucial elements will be exhausted in 1, 2, or 3 hundred million years.