Instead, the graphite nanoparticles tend to agglomerate, and their small size and poorer contrast due to lighter weight make it difficult to perceive the contours of the particles from the TEM images even by the naked eye.
This makes it difficult to perceive the actual degree of threat that sustainability challenges can pose to people and planet.
In 1999 Surrette wrote about the state of Pound criticism, that "the effort to uncover coherence in a ... crazy quilt of verse styles, critical principles, crankish economic theories and distasteful political affiliations has made it difficult to perceive the genesis and development of any of these components".
This alignment of cells at the boundaries corresponds to domains of Wingless and Hedgehog signalling (Figure 5A and B), though by late third instar, the increase in cell number makes it difficult to perceive the delineation of cells along the A/P axis.
These differences make it difficult to perceive a common denominator for SGN3 action in these two cell types.
Few participants perceived their neighborhood as having a high crime rate making it unsafe to go on walk during the day (24.7%), much traffic on the street making it difficult to walk (26.9%), and much traffic making it difficult to ride a bicycle (11.2%).
CREs might be fairly good leaders but acting in a system that makes it difficult to be perceived as a leader of education and creator of the educational culture.
The high level of perceived threat in the sample made it difficult to analyse whether perceived threat was a confounder or an effect modifier.
76– 79 The assumption, however, that the long-term involvement of patients as equal partners guarantees sustainable inclusion of the patient perspective in outcome research complicates a thorough evaluation and makes it difficult to distinguish between expected, perceived and actual contributions.
Participants' perceived involvement of the patient's family could make it difficult to locate the voice of the patient.
