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Measuring and Improving Mixing Times with Image Analysis

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Hank Hogan

Industrial engineers and others often characterize the performance of agitating impellers using total mixing time — the amount of time that it takes for a solution to reach a degree of homogeneity after a change, such as that caused by stirring. Mixing time can be an important parameter in comparing one agitation-inducing setup with another. An indicator — bromocresol and water — is purple when basic and yellow when acidic, with the transition between the two the result of a fast reaction. Likewise, the addition of an acid, HCl, to a tank being mixed by an impeller makes visible classic...Read full article

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    Published: August 2007
    Glossary
    fluorescence
    Fluorescence is a type of luminescence, which is the emission of light by a substance that has absorbed light or other electromagnetic radiation. Specifically, fluorescence involves the absorption of light at one wavelength and the subsequent re-emission of light at a longer wavelength. The emitted light occurs almost instantaneously and ceases when the excitation light source is removed. Key characteristics of fluorescence include: Excitation and emission wavelengths: Fluorescent materials...
    Accent on ApplicationsApplicationsBasic Sciencechronographfluorescencehomogeneityindustrial

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