Hydrocarbon environment

To predict the octane numbers of more complex mixtures, non-linear models are necessary the behavior of a component i in these mixtures depends on its hydrocarbon environment. 

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NEMA Type 7 (Indoor) and Type 8 (Indoor and Outdoor) Applications for Hydrocarbon Environments... 

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Use the cmc values of a homologous series of single-chained sodium sulphate surfactants, given below, to estimate the standard free energy of transfer of a methylene (-CH2-) group from an aqueous to a hydrocarbon environment. 

It depends on the solution properties, or the relative balance between the hydrophobic and hydrophilic properties of the surfactants at this temperature. This term reflects the relative gain in the free energy when the hydrocarbon part of the surfactants is transferred from the aqueous solution to a hydrocarbon environment (either the micelle interior or the surface layer). The reason for this free energy gain is that the surfactant molecules are oriented at the... 

Figure 9.11 A case of selective compartmentation in reverse micelles, permitting the synthesis of a peptide by the reverse protease action. The product C, produced in the water pool, is expelled into the outside hydrocarbon environment due to its insolubility in water. (Adapted from Barbaric and Luisi, 1981.)...

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