Production has steadily declined since the mid-1990s with the gradual depletion of the Hugoton Natural Gas Area-the state's largest field which extends into Oklahoma and Texas.

Medical stores showed a gradual depletion of serotonin and adrenalin fractions.

Early models failed to take PSCs into account and predicted a gradual global depletion, which is why the sudden Antarctic ozone hole was such a surprise to many scientists.

Another option is a gradual depletion of the ecosystem, as indicated by the finding of a complete herd consisting of individuals suffering a bone disease of an osteosclerotic nature (see X-ray photograph).

This leads to a gradual depletion of norepinephrine stores in the nerve endings.

However their gradual depletion forced the construction of a mill and flotation plant in 1961 to treat the underlying secondary sulphides.

That assumes a 5 percent annual inflation rate and gradual depletion of savings during retirement.

We therefore find ourselves in a vicious circle, which leads to the gradual, though accelerated, depletion of fishery resources.

Factories, for example, supply the military hardware and if destroyed will result in a gradual depletion of forces, since tanks and ships are destroyed but not replaced.

Scientists hope that better information about the extreme seasonal declines in ozone around the earth's poles will also improve the understanding of the more gradual depletion of ozone worldwide as pollutants accumulate in the stratosphere.