To improve visual and refractive outcomes, microkeratome-assisted lamellar keratoplasty for the treatment of keratoconus (exchange of a 9.0-mm anterior recipient lamella with a 9.0-mm donor lamella, using a 200-μm head for the former and a 300-μm head for the latter) was modified by adding a 6.5-mm incomplete full-thickness incision in the recipient bed before suturing the donor graft in place....

The connective tissues of the tadpole undergo extensive remodeling during metamorphosis. In the resorbing tail fins of bullfrog tadpoles, there is a rapid degradation of collagen in the basement lamella coupled with dehydration and loss of the gelatinous core of the fin (1,2). The layers of the dense collagenous basement lamella are loosened, frayed, and invaded by mesenchymal cells.1 A collage...

Here we investigate whether certain face-centered cubic metals display a superior behavior of nanotwinned structures compared to others. We also address the question of an optimal lamella thickness that yields maximum strength and stability. Our analysis of the intrinsic stacking fault energies, csf , and the unstable stacking fault energies, cus, of Al, Pd, Cu and Ag, as well as our atomistic ...

Focused Ion beam (FIB) based tools have become the preferred method to prepare TEM lamellas, largely due to their high resolution imaging capabilities used to identify the site of interest. The quality and thickness of samples has become paramount in order to take full advantage of the ever increasing resolution in aberration corrected TEMs and accurately controlling the lamella thickness at th...

The microstructure of oesophagus and stomach in grey-backed shrike were examined by means of light microscopy. The results showed that the oesophagus glands were mucous glands, the shedding glandular cells and the mucin from the oesophagus glands secreted to the lumen. The number of the glands in the thoracic part was less than that of in the cervical part. The lumens of the glands showed an in...

Occludin is an integral membrane protein localizing at tight junctions with four transmembrane domains. When chicken occludin was overexpressed in insect cells by recombinant baculovirus infection, peculiar multilamellar structures accumulated in the cytoplasm. Partial isolation of these structures indicated that the introduced chicken occludin was highly enriched in these structures. Thin sect...

Intragranular amorphization shear lamellae are found in deformed olivine aggregates. The detailed transmission electron microscopy analysis of intragranular lamella arrested the core a grain provides novel information on mechanism. deformation field is complex and heterogeneous, corresponding to crack type instability involving mode I, II III loading components. formation propagation amorphous ...