Sentence examples for challenge agents are from inspiring English sources
In the United Kingdom, for example, challenge agents are not considered drugs, and experiments with them thus don't require regulatory approval.
Recall that the concern with stimulants as challenge agents was that they cause a substantial release of dopamine at the striatal synapse regardless of current environmental demands; this approach may produce a ceiling effect for dopamine release that does not reflect typical endogenous control.
Prepared vials containing the challenge agent were stored at −80°C±5°C and transferred via an accredited courier to the Oxford Vaccine Group Laboratory in 2013.
The challenge agent was delivered by oral ingestion of bacteria suspended in sodium bicarbonate solution (NaHCO3[aq]) using a predetermined dose-escalation strategy.
To meet this challenge, travel agents are slowly but surely getting online.
Designing dynamic mechanisms is challenging, however, when agents are strategic and can benefit by misreporting their demands for resources.
All publicly available ESTs and expression profiles of T. rubrum during conidial germination in time-course experiments and challenged with antifungal agents are deposited in the database.
Furthermore, attributing all illnesses to specific foods is challenging because most agents are transmitted through a variety of foods, and linking an illness to a particular food is rarely possible except during an outbreak.
These are formidable challenges because antimicrobial agents are available from unsanctioned, as well as sanctioned, providers and the former may have little or no training and unorthodox means of drug distribution.
However, as the newer DAAs are slated to enter the market, decision-makers and clinicians will be faced with the challenge of deciding which agents are most likely to clear HCV, and for many Western countries, which agent(s) will be the most cost-effective to reimburse.
Bacteria, viruses, and other microbiological agents are obvious challenges to health.
