✦ LIBER ✦
Influence of polysorbate 20 and sodium cholate on uptake of p-hydroxybenzoates by the frog, Rana pipiens
✍ Scribed by C. W. Whitworth; H. W. Jun
- Publisher
- John Wiley and Sons
- Year
- 1973
- Tongue
- English
- Weight
- 173 KB
- Volume
- 62
- Category
- Article
- ISSN
- 0022-3549
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✦ Synopsis
The frog, R u m pipiens, was found to take up certain p-hydroxybenzoates when partially immersed in a solution of these substances. The order of decreasing uptake rates for the benzoates was butyl. propyl, ethyl, and methyl. The presence of a nonionic surfactant, polysorbate 20, revcrsed the order; however, a biological surfactant, sodium cholate. appeared to increase the rate of uptake of the parabens. The process was first order. Key phrases r J Polysorbate 20-influence on uptake of p-hydroxy-( 1967).