Multistage liquid impinger

The critical-orifice liquid impinger as a sampler for bacterial aerosols.

Studies in aerobiology are often conducted on a comparative basis; that is, the numbers of viable airborne organisms obtained under one set of circumstances are compared to those obtained under other conditions. For samplers employed in such studies, reproducibility and ease of handling often are considered more important than absolute efficiency because the final conclusions are derived from i...

The pre-impinger, a selective aerosol sampler.

When airborne particles are inhaled it is known that most of those of effective diameter greater than about 5 ,u are filtered out by the upper respiratory tract. Current knowledge of this subject as reviewed by Davies (1949, 1952) indicates that the size of particle which has a 50% chance of passing through the upper respiratory tract lies somewhere in the range 312t to 5 t±. Toxic effects from...

Determination of salvinorins and divinatorins in Salvia divinorum leaves by liquid chromatography/multistage mass spectrometry.

Salvinorin A is the most potent naturally occurring hallucinogen known and rivals synthetic LSD in potency. Structurally it belongs to the neoclerodane diterpenoids, and it is the only known non-nitrogenous kappa-opioid-selective agonist. Salvia divinorum (Diviner's sage) is a member of the mint family that was used in ancient Mexican traditional practices. Today it is widely cultivated in Euro...

Multistage Modeling

Multistage Situations

We introduce and analyze “multistage situations”, which generalize “multistage games” (which, in turn, generalize “repeated games”). One reason for this generalization is to avoid the perhaps unrealistic constraint inherent to noncooperative games that the set of strategy tuples must be a Cartesian product of the strategy sets of the players. Another reason is that in most economic and social a...