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Effect of building ventilation design on environment and performance of turkeys
1994
DeBey, M.C. | Trampel, D.W. | Richard, J.L. | Bundy, D.S. | Hoffman, L.J. | Meyer, V.M. | Cox, D.F.
Environmental variables in 10 commercial turkey confinement buildings, representing 2 natural ventilation designs, were measured during summer and the following winter. Sliding doors spaced at intervals along the walls of 5 of the buildings provided about 35% opening, and continuous wall curtains provided 60 to 80% opening in the other 5 buildings. Environmental variables assessed included airspeed; temperature; relative humidity; gases; particle number, size, and mass per cubic meter of air; and colonies of bacteria, yeasts, and other fungi per cubic meter of air. Colonies of yeasts and other fungi were quantitated in feed and litter. For most of the variables evaluated, significant differences were not attributable to building ventilation design; however, in winter, the total mass of particulate matter per cubic meter of air was higher in the curtain-type houses, compared with sliding door-type houses. Ammonia concentration in the air of sliding door-type houses progressively increased during summer and winter sampling periods. A significant effect of building ventilation design on turkey performance was not detected when using mortality, average daily gain, feed conversion, condemnations at slaughter, or average individual bird weight as measures of production.
Afficher plus [+] Moins [-]Enhancement of cell-mediated immunity by administration of plasma protein in pigs-(1)-Proportion of leukocyte subpopulations and cells expressing adhesion molecules in peripheral blood
1994
Yang, C.K. (Thaihan Industry Company, Seoul (Korea Republic). Veterinary Diagnostic Laboratory) | Kim, S.J. (Konkuk University, Seoul (Korea Republic). Department of Veterinary Medicine) | Moon, J.S. | Jung, S.C. | Park, Y.H. (Rural Development Administration, Anyang (Korea Republic). Veterinary Research Institute)
Enhancement of cell-mediated immunity by administration of plasma protein in pigs-(2)-Proportion of T lymphocyte subpopulations and cells expressing MHC class 1, 2 molecules in peripheral blood
1994
Yang, C.K. (Thaihan Industry Company, Seoul (Korea Republic). Veterinary Diagnostic Laboratory) | Kim, S.J. (Konkuk University, Seoul (Korea Republic). Department of Veterinary Medicine) | Moon, J.S. | Jung, S.C. | Park, Y.H. (Rural Development Administration, Anyang (Korea Republic). Veterinary Research Institute)
Studies on the artificial infection and the hematological change with Fasciola hepatica metacercariae in rats
1994
Kang, S.W. (Rural Development Administration, Anyang (Korea Republic). Veterinary Research Institute)