Accurate measurement of repertoire diversity remains an experimental challenge.
The animals were healthy and seronegative to JEV prior to the experimental challenge.
The wavelength of the radiation defines the tolerance for the beam optics, and the experimental challenge.
Understanding the specific nature of altered phenomenology in the psychedelic state therefore stands as an important experimental challenge.
Impressive as the standard model has been, surviving one experimental challenge after another, there is much that it has not explained.
Even in favorable neuroanatomical circumstances, studying neural ensemble function presents a serious experimental challenge.
Furthermore, certain AMPPs derived from hemoglobin-β are upregulated to microbicidal levels after experimental challenge.
Crystallization of RNAs with complex three-dimensional architectures remains a formidable experimental challenge.
Avoiding secondary reactions taking place in the gas phase is another experimental challenge.
The overall functional immunity was tested by experimental challenge with live virulent Aeromonas hydrophila.
Clements, M.L., Betts, R.F., Tierney, E.L. & Murphy, B.R. Serum and nasal wash antibodies associated with resistance to experimental challenge with influenza A wild-type virus.
