G. G. Jackson The pathogenesis of bacterial infection defines the dynamics at an interface of ecologic association of bacteria and host. First, it occurs at the portal of initial contact with a per missive target cell. The infected cell provides either a passive or a specific receptor for the bacterium or its products, to gether with ligands and an environment of helper and inhibiting factors. The result is bacterial replication to produce an im balance of a potentially commensal relation which, under other defined conditions, would be optimal for the survival of both the host and bacterial...

Experimental gerontopsychology attempts to test causal hypotheses about old age-related behavioral changes by the manipulation of age-differences. An experimental treatment is introduced with the purpose of equating different age-groups with respect to a potentially relevant function. If the treatment results in an assimilation of the behavior of the different age-groups (age by-treatment interaction), differences in this function are con sidered as causal for the normally observed behavioral differ ence. If it does not result in an assimilation of the behavior of the different age-groups...

Held at Boppard, Germany, October 3-6, 1984

These proceedings contain the papers presented at the Bayer-Symposium V which was held in Grosse Ledder on October 16-21, 1973 and which was simultaneously the Second International Research Conference on Proteinase Inhibitors. The cordial atmosphere, the frank discussions and the profitable exchange of ideas during the First International Research Conference on Proteinase Inhibitors which was held on November 4--6, 1970 in Munich were a stimulant for us to consider holding a Second Conference especially as the steadily increasing research activities in this and related fields called for a new...