Dose-speed capacity

Dose-speed capacity Product of the delivered dose and the line speed at the maximum beam power ... 

Dose-speed capacity = Delivered dose x Line speed... 

In usual EB operation, the dose-speed capacity is measured in m/min at 10 kGy It is the most convenient unit to relate the curing performance of an electron beam processor to the desired process parameters, such as dose and line speed. ... 

Process parameters involve line speed if dose rate and line speed are combined, the dose delivered to the product to be cured can be calculated. A processor-specific yield factor depends on the relationship between the beam current and line speed. The dose-speed capacity of a processor is given by the product of the line speed and the delivered dose at maximum electron beam power.27... 

Drug elimination may not be first order at high doses due to saturation of the capacity of the elimination processes. When this occurs, a reduction in the slope of the elimination curve is observed since elimination is governed by the relationship Vmax/(Km- -[conc]), where Vmax is the maximal rate of elimination, Km is the concentration at which the process runs at half maximal speed, and [cone] is the concentration of the drug. However, once the concentration falls below saturating levels first-order kinetics prevail. Once the saturating levels of drugs fall to ones eliminated via first-order kinetics, the half time can be measured from the linear portion of the In pt versus time relationship. Most elimination processes can be estimated by a one compartment model. This compartment can... 

First, a reference background spectrum for the IR spectrophotometer was obtained then the reactor was charged with 35 mL of 0.1 M hydrochloric acid. The stirrer speed was set to 600 rpm and the reaction temperature, Tr, was set. Next, 2 g of a mixture of 10.7 mmol of acetic anhydride and 15.1 mmol of acetic acid was added at a constant dosing rate of 5 mL min-1. Three experiments were carried out at each of three reaction temperatures, Tr = 25, 40 and 55°C. For the determination of qoos, the heat capacity of the feed mixture (1.83 kj kg-1 K-1) was calculated using the mass fraction and the heat capacities of the pure components (acetic anhydride cp = 1.65kjkg-1 K-1 and acetic acid cp =2.05kjkg-1 K-1). 

Feed rate is most often the first parameter to be investigated. The capacity of the decanter is of fundamental interest to the user. The pond level and bowl speed will have been fixed during the preliminary testing. If flocculanl is to be used, then a safe dosing level will have been determined and used during the preliminary tests, after bench evaluation of likely polymers to be used. The safe dosing level will be such as to permit a wide range of feed rates and conveyor differentials, without any appreciable deterioration in centrate quality. A series of tests at. say. five different feed rates will be conducted and samples of feed, centrate and cake will be taken for solids analyses. 

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