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Biological control of insect pests is characterised by a persistent, strong reduction in the pest population following the introduction of a natural enemy. Analysis of mathematical models suggests that differential exploitation of patches of the pest in a spatially heterogeneous environment provides the most likely mechanism to account for known successes.
On the basis of the data reported here, one may conclude that although many agents that act in the central nervous system are modulators of the action of cyclic AMP, it is difficult to establish a direct connection between the pharmacologic activity and the levels of cyclic AMP in the brain. This lack of interrelation applies to the benzodiazepines as well(More)
BACKGROUND Chronic pain treatment guidelines are unclear and conflicting, which contributes to inconsistent pain care. In order to improve pain care, it is important to understand the various factors that providers rely on to make treatment decisions. The purpose of this study was to examine factors that reportedly influence providers' chronic pain(More)
Two structurally novel alkylthio-substituted steroids, (11 beta, 17 alpha)-17-(ethylthio)-9 alpha-fluoro-11 beta-hydroxy-17-(methylthio)andro-1,4-dien-3-one (tipredane, SQ 27,239) and (11 beta, 17 alpha)-(ethylthio)-9 alpha-fluoro-17-[2-(fluoroethyl) thio]-11 beta-hydroxy-androsta-1,4-dien-3-one (SQ 28,300) were compared to presently available topical(More)