Rate of penetration of alcohols

Plant Growth Regulation. When NAA is used for fruit thinning, results can be unpredictable. Problemswith foliar penetration of NAA can contribute to this variability. Usingisolated pear leaf cuticles we have investigated effects of humidity,temperature, hard water and selected adjvants on rates of cuticularpenetration of NAA.
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Alcohol penetration in U.S. households in 2018, by channel

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Factors Affecting Fixation | National Diagnostics

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Fixation and Fixatives (2) – Factors influencing chemical fixation, formaldehyde and glutaraldehyde

This second part of the Fixation and Fixatives series covers the factors that influence the rate and effectiveness of tissue fixation as well as looking at two common fixatives: formaldehyde histology and glutaraldehyde ultrastructural electron microscopy studies. There are a number of factors that will influence the rate and effectiveness of tissue fixation. Temperature: Increasing the temperature of fixation will increase the rate of diffusion of the fixative into the tissue and speed up the rate of chemical reaction between the fixative and tissue elements. It can also potentially increase the rate of tissue degeneration in unfixed areas of the specimen. This is really a compromise that appears to be widely accepted to produce good quality morphological preservation.
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Ethanol is a commonly used fixative. Fixation of the inner layers of the tissue depends on the ability of the fixative to diffuse into the tissue. It is unknown whether the concentration of ethanol affects its penetration into tissues.
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