The few studies that have attempted to correlate CT volumes with pathologic specimens have been biased, for example, by the shrinkage of pathologic specimens and the problem of deflation of excised lung.
[In applying broad-range rDNA PCR to clinical specimens, one confronts the problem of 16S rDNA sequence microheterogeneity.
With mounting evidence in favour of quantitative assessment of specimens, this problem may need addressing.
In addition to the specimen problems listed above, PCR inhibitors may cause some false-negative results.
In October 1999, after having been informed by Currie of the problems and seeing the specimen for the first time, Xu noticed that the tail of "Archaeoraptor" strongly resembled an unnamed maniraptoran dinosaur that he was studying later to be named Microraptor zhaoianus.
However, when testing the yellow fever and Dengue virus positive specimens, problems with the flavivirus cross- reactivity become obvious, resulting in specificities between 14 and 81%.
Note that sample sizes are uneven across metabolic control indicators, because there were some blood specimens with problems for computing levels of HbA1C, Triglycerdies, LDL, and HDL.
He might as well be observing a medical specimen, and that's the problem: by withholding the real Porfirio's sensational past until the film's final moments, Mr. Landes denies us full context for his coiled personality and the immensity of his frustrations.
Although the problem of specimen motion during imaging has been known since cryo-EM was first developed, the role of the support in this movement has only been recently identified.
During the impact campaign on H-shaped specimens a major problem with the auxiliary bonding of the substrates to the mounting angles occurred in a number of specimens.
