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- W2002255164 abstract "Surface tensions of N-dodecanoyl amino acids were measured in 100 mM NaOH solution at 45.0°C. The dependence of the surface tension γ on the surfactant concentration (CA−) was expressed by the equation γ = γ0 - RTΓmln(1 + KCA). The saturated adsorbed amount of surfactant at the air-water interface Γm varied somewhat with different amino acid side chains. The hydrophobicity of an amino acid was defined by using the critical micelle concentration (CMC(X)) of its N-dodecanoyl derivative as Δg = ln CMC(X) − ln CMC(glycinate). A progressive increase in hydrophobicity produced an increase in K and in the surface pressure at CMC (πCMC). A linear relationship existed between Δg and efficiency in surface tension reduction, pC20, i.e., the logarithm of reciprocal of the concentration when γ0 − γ is 20 mN/m. It was found that the amino acid side chains in the surfactants did not have a hydrophobic interaction with the dodecanoyl grup." @default.
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- W2002255164 title "Hydrophobicity and surface activities of sodium salts of N-dodecanoyl amino acids" @default.
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- W2002255164 doi "https://doi.org/10.1016/0021-9797(89)90146-x" @default.
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