Sentence examples for migration is difficult from inspiring English sources

For porous 3-D biopolymer networks such as collagen gels, however, the effect of matrix stiffness on cell migration is difficult to separate from effects of matrix pore size and adhesive ligand density, and is therefore unknown.

Although the magnitude of return migration is difficult to measure, the fact that migrants accumulate knowledge and financial capital in rich countries before spending the rest of their career in their origin country is also a potential important and positive feedback (Dos Santos and Postel-Vinay, 2003 1996).

Migration is difficult to measure because it is highly repeatable.

Migration is difficult to measure notably because it is highly repeatable (multiple moves per individual over a period of time).

In conclusion, the study of β- and γ-actins' role in cell migration is difficult to elucidate and will last for several years.

This requirement of PKA activity for migration is difficult to reconcile with the evidence for inhibition of cAMP signaling required to maintain ENCDCs in an undifferentiated state.

Poultry movement and wild bird migration are difficult to assess in a quantitative manner [3].

Overall, despite evidence suggesting a link between neutrophil chemotaxis and outcomes after burn injury, existing assays for neutrophil migration are difficult to implement in the clinical setting, and as such, the prognostic potential of chemotaxis measurements remains largely unexplored.

Overwhelming cell death could be observed at the concentration of 100 μg/mL, and the migration was difficult to be evaluated.

Although the West Eurasian component is probably primarily related to migrations during the Holocene period, the exact source and time of such migrations is difficult to establish [ 12, 45].

Fourth, measuring international migration accurately is difficult because of increasing numbers of illegal or undocumented migrants.