: Values in America . Donald N. Barrett.

Histopathology in Barrett Esophagus and Barrett Esophagus-Related Dysplasia

Pathologic specimens, both biopsies and endoscopic mucosal resections, for Barrett esophagus and Barrett-associated dysplasia and malignancy are common for pathologists in North America, and the incidence in South Asian countries seems to be increasing. Dysplasia and malignancy arising in intestinalized gastric-type mucosa raises issues in the interpretation of dysplasia and the evaluation of t...

Why Good Companies Go Bad by Donald N . Sull

NONIMMERSIONS OF RP n IMPLIED BY tmf , REVISITED DONALD

In a 2002 paper, the authors and Bruner used the new spectrum tmf to obtain some new nonimmersions of real projective spaces. In this note, we complete/correct two oversights in that paper. The first is to note that in that paper a general nonimmersion result was stated which yielded new nonimmersions for RP with n as small as 48, and yet it was stated there that the first new result occurred w...

Surveillance in Barrett Esophagus

The only known precursor of the esophageal adenocarcinoma (EAC) is represented by the Barrett's esophagus (BE). EAC incidence has increased sharply in the last 4 decades. The annual conversion rate of BE to cancer is small but significant; therefore the identification of patients at a higher risk of cancer represents a dilemma. The endoscopic surveillance of BE aims to detect dysplasia and in p...

The Interrelation O F Plasmagenes and Chromo - Genes I N Pollen Production I N Maize Donald

IV INHERITED condition of pollen abortion is frequently found in many A species of plants. In maize 20 genes for male sterility are listed by EMERSON, BEADLE and FRASER (193.5). Male sterile-1 reported by SINGLETON and JONES (1930) is on chromosome 6 closely linked with the Y y endosperm locus. All of the gene steriles described are independent recessives, each capable of bringing about either ...