Another limitation of phase-contrast X-ray CT is that materials with too high density (such as calcified bone) or too low density (such as air) causes artifacts in the reconstructed image as is the case in OPT, which makes it difficult to visualize an in vivo fetus.
Hence it may not be a very robust parameter to estimate, and is also difficult to visualize what a country with such a low-income level may look like.
Although the Rmontanensis700 rickettsiae were resistant to CHL, GFPuv-fluorescent rickettsiae were difficult to visualize on a Nikon Eclipse E400 microscope equipped with epifluorescent illumination and a fluorescein isothiocyanate filter.
This geometry is more difficult to visualize, but a helpful model presents the hyperbolic plane as the interior of a circle, in which straight lines take the form of arcs of circles perpendicular to the circumference.
Pelagic ecosystem protection is usually incidental because these ecosystems are often data-poor and are difficult to visualize in a planning context.
However, when the numbers of sequences exceed a few hundred, it becomes difficult to visualize and analyze a phylogenetic tree, which is a standard device to study the molecular evolution and epidemiology of viral outbreaks.
It is difficult to visualize Toscanini in a scene like the one that unfolded at the Elbphilharmonie.
Models could be 3D printed for each of these scenarios for practice in identification, and to familiarize doctors with AAAs that could be difficult to visualize with only a 3D computer image.
A likely reason is that telomeres in CA are very short, making it difficult to visualize telomeres using a PNA or antibodies against telomeric proteins (Meeker et al, 2004b) (Supplementary Figure S5C).
