We compared ecological character&tics o f three spatially independent invasions of the European green crab Carcinus maenas to determine which characteristics were most consistent across invasions, and hence would be most predictable in future invasions. For invasions in western North America ( W N A ) , eastern North America (ENA) , and South Africa (SAF) , we compared five characteristics: (1)...

Metastatic tumors of the heart, while of more frequent occurrence than primary lesions, are still of sufficient rarity to warrant the recording of a series of fourteen cases. These cases were found among 327 autopsies performed on cases of known malignancy at the State Institute for the Study of Malignant Disease. Yater, in 1931, published a very comprehensive review of the literature, in which...

40 F aculty development professionals have much in common with guerilla warriors — not the bad guys who wreak havoc, but the “irregular” forces for change (see the sidebar “Definitions”). Faculty development professionals should consider adopting at least some guerilla tactics and strategies to facilitate change in higher education. They can use these tactics to promote the integration of techn...

HE yeast Saccharomyces cerevisiae normally alternates between haploT phase and diplophase, propagating vegetatively primarily as a diploid (WINCE 1935). SUBRAMANIAM and coworkers ( SUBRAMANIAM and KRISHNA MURTHY 1949; MITRA and SUBRAMANIAM 1949 ; SUBRAMANIAM 1951) have reported the production of tetraploids by the exposure of diploid yeast to acenaphthene and chrysene. Their data lack any genet...

Thymocytes must bind major histocompatibility complex (MHC) proteins on thymic epithelial cells in order to mature into either CD8 + cytotoxic T cells or CD4 + helper T cells. Thymic precursors express both CD8 and CD4, and it has been suggested that the intracellular signals generated by CD8 or CD4 binding to class I or II M H C , respectively, might influence the fate o f uncommitted cells. H...

Comparative Endocrinology o f Calcium Regulation—Sunday Comparative Endocrinology Sunday, June 24, 2007 CE01 Calcium storage in sarcoplasmic reticulum: The role of calcium pumps and binding proteins during elevated influx in calcifying crayfish M. Wheatly, Y. Gao, C. Gillen, Z. Jamal Wright State University, Dayton, OH Kenyon College, Gambier, OH, USA The sarcoplasmic reticulum (SR) is the prim...

Since Ewing’s first report of a previously unrecognized tumor of bone derived from endothelial elements (1)’ there have been numerous reports of tumors which have conformed with his endothelial myeloma, and others which have sought to deny the existence of such a tumor. Among these was an article by the present writer (2) agreeing almost entirely with Ewing’s conclusions. Kolodny (3) believed t...

The mechanisms that allow the long-term survival of major histocompatibility complex (MHC)Limmunologically enhanced organ allografts are poorly understood (1-5). In rodents, enhancement can be induced by treatment with either hyperimmune serum at the time of grafting or prior immunization with donor ailoantigen. After a treatment rejection episode, many of these rats develop a state in which th...

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