Clinical mastitis in cows treated with sometribove (recombinant bovine somatotropin) and its relationship to milk yield.

Effect of sometribove (methionyl bovine somatotropin) on mastitis in 15 full lactation trials (914 cows) in Europe and the US and 70 short-term studies (2697 cows) in eight countries was investigated. In full lactation studies, sometribove (500 mg/2 wk) was given for 252 d, commencing 60 d postpartum. Although herds varied considerably, incidence of clinical mastitis within a herd was similar for cows receiving control and sometribove treatments. Relative risk analyses indicated no treatment effect, and percentage of mastitis during treatment was similar for control and sometribove groups. A positive linear relationship existed between peak milk yield and mastitis incidence (percentage of cows contracting mastitis or cases per 100 cow days); sometribove treatment did not alter this relationship. Increases in mastitis related to milk yield increase from sometribove or related to genetic selection were similar. When expressed per unit of milk, mastitis incidence declined slightly as milk yield increased; this relationship was not altered by sometribove. No effect on clinical mastitis was observed in 70 commercial herds utilizing sometribove for 84 d. However, effects were significant for stage of lactation and milk yield. Overall, studies represented a wide range of research and commercial situations demonstrating that sometribove had no effect on incidence of clinical mastitis during the lactation of treatment. Furthermore, sometribove did not alter typical relationships between milk yield or herd factors and incidence of clinical mastitis

Conceptual design characteristics of a denatured molten-salt reactor with once-through fueling

A study was made to examine the conceptual feasibility of a molten-salt power reactor fueled with denatured /sup 235/U and operated with a minimum of chemical processing. Because such a reactor would not have a positive breeding gain, reductions in the fuel conversion ratio were allowed in the design to achieve other potentially favorable characteristics for the reactor. A conceptual core design was developed in which the power density was low enough to allow a 30-year life expectancy of the moderator graphite with a fluence limit of 3 x 10/sup 26/ neutrons/m/sup 2/ (E > 50 keV). This reactor could be made critical with about 3450 kg of 20% enriched /sup 235/U and operated for 30 years with routine additions of denatured /sup 235/U and no chemical processing for removal of fission products. A review of the chemical considerations assoicated with the conceptual fuel cycle indicates that no substantial difficulties would be expected if the soluble fission products and higher actinides were allowed to remain in the fuel salt for the life of the plant

[BALTIMORE CITY] Atlas of the City of Baltimore, MD - 1897 [SINGLE SHEETS]

During the years 1893-1896 the Baltimore City Topographical Survey published 39 separate topographic maps covering all areas within the boundaries of Baltimore City. Each map sheet covers one quadrant of a pre-defined grid system. The scale of each map sheet is 1:2,400 (1 inch = 200 feet) and the contour interval is five feet. The name(s) of the responsible cartographer(s) appear on each sheet along with the month and year that their work was completed. Cartographers include Thos. M. Ward, Malcolm A. Cudlipp, W.A. Wansleben, Frank K. Duncan, R.A. MacGregor and Wm. Bauman Jr. In 1897 all 39 of the individually map sheets published from 1893 –1896 were bound together to form a single volume titled “Atlas of the City of Baltimore, MD”. Images from the bound volume are also posted in JScholarship at https://jscholarship.library.jhu.edu/handle/1774.2/32745. The images posted here are from the separate topographic map sheets held by the Johns Hopkins, George Peabody Library. The size of each separate topographic map sheets is about 36 inches tall x 33 inches wide. Two of the sheets in the George Peabody Library (sheet 1N-1W and sheet 3N-1E) are photocopies. The library does not have original copies of these two sheets. As a result, posted here for sheet 1N-1W and 3N-1E are scans obtained from the original map sheets held by the American Geographical Society (AGS) Library at the University of Wisconsin Milwaukee. ¬¬¬¬¬¬We are indebted to the AGS staff for helping us make these images available