In each case, the FS-MA nanoparticles appear as electron-opaque (dark) aggregate features, whereas the styrenic lamellae of the SM copolymer are likewise dark due to selective staining.
Spherical spindle pole bodies containing electron-opaque inclusions are set within gaps on opposite ends of the nuclear membrane.
The cytoplasm contained Birbeck granules, cytoplasmic organelles with rod like profile, electron-opaque central lamella and rounded ends.
Amphibole fibers tend to be straight, splintery, and electron-opaque, although curved fibers are occasionally observed.
For areas ii and iii where electron-opaque particles were analyzed, the EDS spectra feature characteristic peaks for Cu.
The presence of AChRs was identified as a dark electron-opaque border on the crests of the subneural folds.
Noteworthy, for both the Kv4.2(209–225) and the Kv4.2(454–469) antibodies, the electron-opaque reaction product was detected at the intracellular, protoplasmic side of ITC neurons.
We also observed that electron-opaque particles with diameters in the range of 20 100 nm were often co-localized with the modified regions of cell walls (Fig. 2c, d).
In some NMJs, this dark electron-opaque border extended to the immediately adjacent, unfolded, portion of the postsynaptic membrane, paralleling the spiculated aspect observed under confocal microscope after AChR labeling (Fig. 2D).
