Defect Production in Single Crystals Resulting from Ion Bombardment Semiannual Status Report, 1 Jun. - 31 Dec. 1966

Damage produced on surface of metal single crystals during ion bombardmen

Defect Production in Single Crystal Resulting from Ion Bombardment Semiannual Status Report, 1 Jul. - 31 Dec. 1967

X ray spectrometer and vacuum system for single crystal defects studie

Retention of differentiated properties in an established dog kidney epithelial cell line (MDCK).

Madin-Darby canine kidney (MDCK) cells grown in tissue culture have the morphological properties of distal tubular epithelial cells, form tight junctions, and lack several proximal tubular enzyme markers. Adenylate cyclase in these cells was stimulated by vasopressin, oxytocin, prostaglandins E1 and E2, glucagon, and cholera toxin. Hormone-stimulated adenylate cyclase activity in isolated membrane preparations was dependent on low concentrations of GTP and had the MgCl2 and pH optima expected for the kidney enzyme. The results, as well as the demonstration of enhanced hemicyst formation induced by cyclic AMP, suggest that the MDCK cell line has retained the differentiated properties of the kidney epithelial cell of origin. When MDCK cells were injected into baby nude mice, continuous nodule growth was observed until adulthood was attained. Histological studies revealed the presence of two cell types: normal mouse fibroblasts which comprise 80--90% of the solid nodule mass, and MDCK cells, which formed epithelial sheets lining internal fluid-filled glands. Electron microscope analysis showed that the mucosal surfaces of the cells were characterized by microvilli which faced the lumen of the glands, that adjacent MDCK cells were joined by tight junctions, and that the serosal surfaces of the epithelial sheets were characterized by smooth plasma membranes which were lined by a continuous basement membrane. These observations lead to the conclusion that the MDCK cells retain regional differentiation of their plasma membranes and the ability to regenerate kidney tubule-like structures in vivo

Character and Community: Rispetto as a Virtue in the Tradition of Italian-American Lawyers

Our project is to contemplate a discrete piece of applied ethics in the American legal profession, a piece of what one might call Italian-American legal ethics. We propose to describe a moral value for which we will use the Italian word rispetto. Our understanding of rispetto is that it is a virtue, a good habit, through which the person learns, practices, teaches, and remembers his place within the family. We will argue here that the practice of this virtue will allow a modern lawyer to be in and of his or her civic and professional community without loss of dignity and a sense of self