Sentence examples for upon challenge from inspiring English sources

But Dr. Shockley's team had to address challenge upon challenge.

Upon challenge, keratinocytes elaborate antimicrobial peptides, cytokines and chemokines that activate and recruit patrolling leukocytes.

LRRs possibly involve in protein-protein interactions also and show differential expression pattern upon challenge with pathogens.

Upon challenge, viral titers in the lungs of immunized animals were significantly reduced as compared to those of control animals.

showed signs of DTH upon challenge [100].

The suspicious vessel was closed on and illuminated, and revealed nine armed men in uniform who surrendered immediately upon challenge.

RB51 vaccinates also lack significant production IL-12p70 or high levels of IL-4 upon challenge.

Both groups of bacteria exhibited similar acid sensitivity upon challenge at pH 3.0 (fig. 2A).

This disruptive effect is correlated with a severely impaired T cell-dependent antibody response upon challenge with ovalbumin.

In the latter three, it appeared as if vaccine viruses were reactivated upon challenge with heterologous virus.

Improving adherence to prescribed medical treatments remains an almost universally agreed-upon challenge in health care.