Chemical agents are classified as persistent or nonpersistent.

Uptake of the compound is through leaves, stems and roots; however, it is, in general, nonpersistent.

Agents classified as nonpersistent lose effectiveness after only a few minutes or hours or even only a few seconds.

Tactically, nonpersistent agents are very useful against targets that are to be taken over and controlled very quickly.

Altogether, 838,019 rounds of ammunition-high explosive, smoke, and nonpersistent gas-were expended in a single battle.

This virus is transmitted by several species of aphids in a nonpersistent manner and by mechanical inoculation.

To achieve a nonpersistent deployment, the agent is dispersed into very small droplets comparable with the mist produced by an aerosol can.

A flat ad hoc topology refers to establishing nonpersistent network connections as needed among AN nodes that are present at a given time.

In nonpersistent disease, there is a strong genetic association with HLA DR3-DQ2.

These compounds are nonpersistent sodium channel modulators, and are much less acutely toxic than organophosphates and carbamates.

Purely gaseous agents such as chlorine are nonpersistent, as are highly volatile agents such as sarin and most other nerve agents.

The Conemaugh Group consists of cyclic sequences of shale, siltstone, sandstone, red beds, thin impure limestone, and thin nonpersistent coal.

"Vx nerve gas is potent but nonpersistent, meaning our forces can safely move in within days of the attack; the chemical disperses when exposed to wind or moisture, so danger to surrounding areas is minimal.

In general, the advantages of using semiochemicals are they have adverse effects only on target pests, they are relatively nontoxic and required in low amounts, they are nonpersistent and environmentally safe they appear difficult for insects to develop resistance against.

Some nonpersistent agents, such as most pulmonary agents such as chlorine and phosgene, blood gases, and nonpersistent nerve gases (e.g., GB) will dissipate from open areas, although powerful exhaust fans may be needed to clear out buildings where they have accumulated.