The macrophages are responsible for the removal of undesirable substances from the synovial fluid.

The muddy bottom, however, is still reported to contain undesirable substances in significant quantities.

Non-sweet crude usually contains greater amounts of sulfur, metalic and other undesirable substances that much be removed by refiners.

Coarse-grained French oak grown in the Limousin and Burgundy forests have lower concentrations of these undesirable aromatic substances.

Or mix the pills with an undesirable substance - like kitty litter or used coffee grounds - wrap it all up, and throw it away.

The goal is to find those species that consume or break down undesirable substances and then to figure out how to make them flourish.

According to owner Lopez this is "to prevent the formation of undesirable substances".

Any synthetic chemical will carry with it a small percentage of undesirable substances which are not found in the essential oil.

Yesterday, we discussed the circulation of compound feedingstuffs; today, at a second reading, we are back with undesirable substances in animal nutrition.

I wish also to inform you that a revision of the maximum levels of the undesirable substances in Annex I is foreseen.