An intensive study has been made of the columnar-lined gullet (Barrett syndrome) and in the patient described it was shown to have the motor characteristics of the body of the oesophagus. At the distal end there was the normal receptive relaxation with swallowing. There was no discontinuity between the squamous and the columnar-lined portions.

We have previously explored the hysteresis and reversibility of transitions between ordered packings soft spheres diameter d in cylindrical channels D [A. Mughal, J. Winkelmann, D. Weaire, S. Hutzler, Phys. Rev. E 98, 043303 (2018)]. Here we extend these initial results to include all columnar structures without inner (i.e. which are contact with boundary). These can be represented by a directe...

The epithelium lining the mouse larynx occupied the transitional zone between the keratinized stratified squamous epithelium lining the oral cavity and the ciliated columnar one continuing to the trachea. The epithelium showed gradations ranging from stratified squamous through stratified cuboidal to ciliated stratified low-columnar type. It is suggested that the epithelium is identical with th...

[structure: see text] We report the synthesis and characterization of partially fluorinated condensed tetracyclic aromatic compounds. Typical edge-to-face/herringbone packing of nonfluorinated analogues is replaced here by columnar stacks with disk planes orthogonal to the columnar axes. Enhanced pi-overlap results with overlaid electron-poor and -rich regions.