Bottomonia in the Quark-Gluon Plasma and their Production at RHIC and LHC

We study the production of bottomonium states in heavy-ion reactions at collider energies available at RHIC and LHC. We employ an earlier constructed rate equation approach which accounts for both suppression and regeneration mechanisms in the quark-gluon plasma (QGP) and hadronization phases of the evolving thermal medium. Our previous predictions utilizing two limiting cases of strong and weak bottomonium binding in the QGP are updated by (i) checking the compatibility of the pertinent spectral functions with lattice-QCD results for euclidean correlators, (ii) adapting the initial conditions of the rate equation by updating bottom-related input cross sections and the charged-particle multiplicity of the fireball, and (iii) converting our calculations into observables as recently measured by the STAR and CMS experiments. Our main findings are a preference for strong $\Upsilon$ binding as well as a significant regeneration component at the LHC.Comment: 12 pages, 25 figure

Mercury-Selentium Interrelationships in Layers

Results presented in previous Poultry Field Day reports (A.S. Series 73-18, 74-19) have shown 5 to 10 ppm mercury as methylmercury to lower production and reproductive efficiency of hens. Reports from other stations have indicated the existence of a mercury-selenium interrelationship whereby the toxicity of one is reduced by the presence of elevated dietary levels of the other. The studies reported herein were for the purpose of determining the extent that this inter relationship may serve to reduce the detrimental effects of methylmercury or selenium in layers

Mercury and Selenium Interactions During Growth and Reproduction of Chickens (Progress Report)

Elevated levels of mercury exist in various segments of the environment largely from past industrial and agricultural activities. Bacterial conversion of inorganic mercury to the biologically more important methylmercury promotes accumulation in animal bodies. Concentrations tend to increase as methylmercury is passed up the food chain through aquatic organisms to fish and water fowl and eventually to humans. It is this form of mercury, i.e., methylmercury, that has been implicated in egg shell thinning and lowered reproduction in birds

Sublethal Effects of Mercury on Growth and Reproductive Performance of Layers

Mercury in our environment has been implicated in egg shell thinning and poor hatchability among various species of wild birds. We have used domestic chickens to determine the effect of a range of sublethal levels of two dietary mercury compounds, i.e., inorganic mercuric chloride and organic methylmercuric chloride

Effects of Mercury on Production and Reproduction of Laying Hens--Second Egg Laying Cycle

Hens fed diets containing various levels of two mercury sources from the time of hatching were studied during a second laying cycle. Early growth data and data pertaining to the first laying cycle were reported in the 1973 Poultry Day reports (A.S. Series 73-18). It was concluded from these earlier phases of the study that inorganic mercury at levels up to 20 ppm in the diet does not influence growth or egg production, quality and hatchability. Methylmercury at levels of 2.5 ppm or less also appeared to be well tolerated with no visible harmful effects. However, detrimental effects of higher levels became increasingly apparent with progression of that phase of the experiment