NIR spectra contain fewer specific spectral features than mid-IR, as overtone and combination bands overlap, making band assignment challenging.
This is because: (1) Different carboxylesterases show substrate or pI value overlap; (2) Various labs isolated the same carboxylesterase independently and assigned it a different name based on enzymatic activity; (3) There is a significantly larger number of carboxylesterase genes in rodents compared to humans, and this makes mouse/human ortholog assignment challenging.
When a media professor handed students an assignment challenging them to go viral online, he suspected they would never pull it off.
A spokeswoman for the Rialto school district, which reversed course on a controversial eighth-grade writing assignment challenging the Holocaust's historical record, said she cannot discuss whether the instructors involved will face any disciplinary action.
Obviously, extensive cross-ring cleavages often lead to rather complex spectra, making spectral assignment challenging [ 161, 162].
Identification of TET enzymes as 2-OG members was a challenging task, due to the large insertions found with the catalytic domains (Table 1) [ 58], that made correct assignment challenging.
Class discussion and homework assignments challenge students to work through the experiments and interpret the findings of published studies as if they had done the work themselves.
On assignment, Elle challenges Sylar and he shows her that he can still be a killer, and not just a "daddy's boy" by killing a rental car assistant.
Finally, the Engage activity for a new unit or topic can come at the end of the previous class session, especially if you are trying to find out what students already know, or in the form of a homework assignment that challenges them to find a news report relevant to the next class topic.
Qualitative feedback, discussed below (e.g., see Insights from External Evaluator's Assessment), indicates that although the research poster assignments present challenges for both professors and students, these assignments have been very important in driving desired student learning outcomes.
