ABSTRACT
Human subjects rated the time course of the burn produced by three concentrations of capsaicin applied to the tongue via filter papers. Data were fit to a dynamic model composed of a level detector, a change detector, and a double integrator. These three processes responded differently to concentration. 6-n-Propyl-2-thiouracil (PROP) taster status correlated positively with the integrator process. Although a minority of subjects showed evidence of the integrator process, any subject with an integrator process at a given concentration also showed it at any higher concentration.
Subject(s)
Adaptation, Psychological/drug effects , Capsaicin/pharmacology , Adult , Algorithms , Antithyroid Agents/pharmacology , Humans , Individuality , Models, Psychological , Propylthiouracil/pharmacology , Sensory Thresholds/drug effects , Time FactorsABSTRACT
Injection seeding of lasing has been achieved in both small (~20-mu; m radius) and larger (~35-mu; m radius) dye-doped microdroplets. Seeding is effective in enhancing the intensity from one lasing mode that normally occurs because of the droplet morphology. Competition between the seeded mode and unseeded lasing modes that have good spatial overlap with the seeded mode prevents lasing on some unseeded lasing modes.
