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Creator:: Christopher, John Paul
Abstract:: 2 -acetylaminofluorene -induced hepatocarcinogenesis in rats proceeds in stages of initiation and promotion, similar to experimental systems, in mouse skin. In this study promoters of liver tumorigenesis, phenobarbital, DDT and butylated hydroxytoluene (BHT), were compared to non-promoters, amobarbital, diphenylhydantoin (DPH) and benz(a)anthracene (BA), for their ability to cause liver growth...
Resource Type:: Dissertation
Full Text:: approved: Redacted for privacy Q1,9})/J. .Linsiey 2 -acetylaminofluorene -induced hepatocarcinogenesis in

Creator:: Zernel, John Joseph, 1945-
Abstract:: John Wesley Powell worked actively for public land system reform while a director of geographical and geological surveys in the West from 1869 to 1894. Although this has won him acclaim as a conservationist, the basis of Powell's linkage of reform with scientific work is poorly understood. A study of...
Resource Type:: Dissertation
Full Text:: REFORM IN A POSITIVE CONTEXT. Redacted for Privacy Abstract approved: ' Robert J. Iris, Jr. John

Creator:: Wallace, William J.
Abstract:: This study traces the historical foundations of the concept of constant ionic proportionality and the equation (Salinity [S%₀] = 1.805 Chlorinity [Cl%₀] + 0.030) which has been in general use in oceanography since 1902 until 1969 and which is based upon this constancy, The notion that the constituents present in...
Resource Type:: Dissertation
Full Text:: -SALINITY CONCEPT IN OCEANOGRAM Abstract approved: Redacted for Privacy Vert J. Moris This study traces

Creator:: Miller, John D. (John David)
Abstract:: This analysis concerns the life and scientific work of Henry Augustus Rowland (1848-1901), organizer and the first chairman of the physics department at The Johns Hopkins University in 1876. Special materials used in this research included three pieces of Rowland's experimental apparatus which are extant in the Smithsonian Institution Division...
Resource Type:: Dissertation
Full Text:: RESEARCHES Abstract approved: Redacted for privacy -R. J. This analysis concerns the life and scientific

Creator:: Lamb, Ronald Deane
Abstract:: The purpose of this investigation was to evaluate the effects of a six week residential summer program of differential education for gifted high school students. It was designed to determine the extent to which participants in the program were proficient in aspects of critical and creative thinking, and in the...
Resource Type:: Dissertation

Creator:: Benson, Keith Rodney
Abstract:: The major historical studies that have examined American biology have emphasized the development of experimental biology at the end of the nineteenth century. In this characterization, the descriptive branch of biology has often been treated as less than important and, in several cases, as a hindrance in the application of...
Resource Type:: Dissertation
Full Text:: Ferdinand Hamburger, Jr. Archives of Johns Hopkins University for her interest in this study and her many

Creator:: Bell, Walter Lyle
Abstract:: This history concerns the scientific contributions of Charles Babbage (1791-1871) to mathematics, to the invention of calculating machines, and machine tools, to the development of scientific ideas through a wide variety of scientific investigations and his involvement in several different scientific reforms. Babbage considered himself a philosopher in the broadest...
Resource Type:: Dissertation
Full Text:: Road; and in the Closet (London: J. Walker, 1806). It should be noted Babbage wrote this "History" from

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