New Perspectives on Race and Slavery in America: Essays in Honor of Kenneth M. Stampp
Slavery in Virginia, 1619-1660 / Robert McColley -- Denmark Vesey's peculiar reality / William W. Freehling -- The Republican Party and the slave power / William E. Gienapp -- Race and politics in the northern democracy, 1854-1860 / Stephen E. Maizlish -- The creation of Confederate loyalties / Reid Mitchell -- Blues falling down like hail / Leon F. Litwack -- Grant and the freedman / Arthur Zilversmit -- The present becomes the past / James Oakes -- Firm flexibility / John G. Sproat -- The soul is fled / Joel Williamson.
The Roots of Black Poverty: The Southern Plantation Economy After the Civil War
In the last twenty years historians, sociologists and economists have engaged in a great reevaluation of the black experience in the United States since the Civil War. The basic question is why blacks have not been able to enter the mainstream of American life and gain their fair share of the benefits of an affluent society. The response of liberal reformers is that racial discrimination kept blacks from obtaining adequate opportunities in the labor market or the educational system; the remedy is to open the labor market and the educational system and to try to eliminate racist attitudes. In this program the national government is seen as an independent source of reform that can set matters right, although real change will take time. Opposed to this view is the conserva-
Chemical, biological, and immunological characterization of mono- and diiodothyrotropin releasing factor.
Abstract Iodination of thyrotropin releasing factor (TRF) with chloramine-T and NaI at pH 7.5 produces both mono- and diiodo-TRF as well as unreacted TRF and I − . The four compounds can be separated by ion-exchange chromatography on SP-Sephadex C-25, using a stepwise gradient of 0.01 m MH 4 OAc at pH 3.5, 5.2 and 7.2. The monoiodo-TRF was characterized by nuclear magnetic resonance, mass spectra, and elemental analysis as [Im-5-iodo-His 2 ]-TRF while the diiodo-TRF was similarly characterized as [Im-2,5-diiodo-His 2 ]-TRF. Both iodination products showed no thyrotropin releasing activity at doses up to 1 μg in the in vivo mouse bioassay. The specific binding of mono- and diiodo-TRF was measured against three different TRF antisera. In the absence of TRF, antisera A and C bound more diiodo-TRF than monoiodo-TRF while antiserum B seemed to bind both tracers equally. In all cases steeper curves were produced when diiodo-TRF was displaced by synthetic TRF.