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  • 1
    Electronic Resource
    Electronic Resource
    Excess enthalpies of some binary mixtures n-alkane + aliphatic ether, n-alkane + hydroxy ether, aliphatic ether + hydroxy ether (1982)
    s.l. : American Chemical Society
    Journal of chemical & engineering data 27 (1982), S. 89-91 
    Details
    ISSN: 1520-5134
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/je00027a028
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  • 2
    Electronic Resource
    Electronic Resource
    Thermodynamic properties of alkyldimethylamine oxides in water. Application of a mass-action model for micellization (1983)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 87 (1983), S. 1397-1406 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100231a024
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  • 3
    Electronic Resource
    Electronic Resource
    Rigby, Richard W.: The May 30 Movement: Events and Themes : Folkestone, Dawson Publishing, 1980 (1983)
    Cambridge : Cambridge University Press
    The @China quarterly 95 (1983), S. 562-562 
    Details
    ISSN: 0305-7410
    Source: Cambridge Journals Digital Archives
    Topics: Linguistics and Literary Studies , History , Political Science , Sociology , Economics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0305741000023468
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  • 4
    Electronic Resource
    Electronic Resource
    Application of a chemical equilibrium model to thermodynamic functions of transfer of alcohols from water to aqueous surfactants (1987)
    Springer
    Journal of solution chemistry 16 (1987), S. 529-554 
    Details
    ISSN: 1572-8927
    Keywords: Mixed micelles ; surfactants ; alcohols ; thermodynamic transfer functions ; volume ; heat capacity ; hydrophobic solutes ; chemical equilibrium model and distribution constant
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract In ternary aqueous solutions, hydrophobic solutes such as alcohols tend to aggregate with surfactants to form mixed micelles. These systems can be studied by meas of the functions of transfer of hydrophobic solutes from water to aqueous solutions of surfactant. These thermodynamic functions often go through extrema in the critical micellar concentration (CMC) region of the surfactant. A simple model based on interactions between surfactant and hydrophobic solute monomers, on the distribution of the hydrophobic solute between water and the micelles and on the shift in the CMC induced by the hydrophobic solute, can simulate the magnitude and trends of the transfer functions using parameters which are mostly derived from the binary systems. In order to check the model more quantitatively, volumes and heat capacities of transfer of alcohols from water to aqueous solutions of a nonionic surfactant, octyldimethylamine oxide, were measured. A quantitative agreement was achieved with three adjustable parameters. Good fits are also obtained for the transfers to the ionic surfactants, octylamine hydrobromide and sodium dodecylsulfate. When the equilibrium displacement contribution is small, the distribution constants and the partial molar properties of the alcohols in the micellar phase agree well with the parameters obtained with similar models.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00646332
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  • 5
    Electronic Resource
    Electronic Resource
    Limiting Partial Molar Excess Heat Capacities and Volumes of Selected Organic Compounds in Water at 25°C (1999)
    Springer
    Journal of solution chemistry 28 (1999), S. 1289-1305 
    Details
    ISSN: 1572-8927
    Keywords: Apparent molar heat capacities ; apparent molar volumes ; partial molar properties ; infinite dilution ; aqueous solutions ; organic pollutants ; group contribution method
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Well-known Picker flow microcalorimeters for the differential measurements of volumetric heat capacities have been employed in conjunction with vibrating tube densimeters to determine the molar heat capacity, volume, and the apparent properties in dilute aqueous solutions for 17 organic solutes of moderate hydrophobicity. The dependence on concentration of the apparent properties allowed the limiting partial molar quantities at infinite dilution to be extrapolated and the limiting partial molar excess quantities to be evaluated. Comparison with available literature data shows good agreement. The application of group contribution rules to the limiting partial properties has been tested using the original method and parameters proposed by Cabani et al. The predicted values of the partial molar volumes are in fair agreement with the present data except for some less common solutes. With partial molar heat capacities, the agreement is less satisfactory. To improve the performance of the method, missing parameters for some types of monofunctional and bifunctional molecules have been evaluated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1021743907228
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  • 6
    Electronic Resource
    Electronic Resource
    Enthalpies of reaction and reaction rates by flow microcalorimetry: Ester hydrolysis in basic medium (1980)
    Springer
    Journal of solution chemistry 9 (1980), S. 59-73 
    Details
    ISSN: 1572-8927
    Keywords: Enthalpies of reaction ; heats of reaction ; kinetics ; ester hydrolysis ; microcalorimetry
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract The conditions under which the Picker flow microcalorimeter can be used to measure enthalpies and rates of reactions were investigated. For this purpose, systematic studies were made of the enthalpies of neutralization of HCl, HBr, HNO 3 , acetic, proprionic, and butyric acids with NaOH, enthalpies of hydrolysis of methyl and ethyl acetate with NaOH, and the reaction rates of the ester hydrolysis with NaOH. The general procedure and various sources of error are discussed and it is concluded that enthalpies of slow reactions can be measured to about 1% when the calorimeter is operated in the quasi-isothermal mode and the reaction rates to about 3% when operated in the quasi-adiabatic mode.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00650137
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  • 7
    Electronic Resource
    Electronic Resource
    Apparent molar heat capacities and volumes of some alkylated derivatives of uracil and adenine in aqueous solution at 25°C (1992)
    Springer
    Journal of solution chemistry 21 (1992), S. 1-13 
    Details
    ISSN: 1572-8927
    Keywords: Partial molar heat capacity ; partial molar volume ; nucleic acid bases ; methyl substituted uracils ; methyl substituted adenines
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Densities and apparent molar heat capacities of some alkylated derivatives of uracil and adenine: 1-methyluracil, 1,3-dimethyluracil, 1,3-diethylthymine, 5,6-trimethylene-1,3-dimethyluracil, 5,6-tetramethylene-1,3-dimethyluracil, 5,6-pentamethylene-1,3-dimethyluracil, 2,9-dimethyladenine, 2-ethyl-9-methyladenine, 2-propyl-9-methyladenine, 8-ethyl-9-methyladenine, 6,8,9-trimethyladenine and 8-ethyl-6,9-dimethyladenine were determined using flow calorimetry and flow densimetry at 25°C. It was found that the partial molar volumes and heat capacities correlate linearly with the number of substituted methylene groups-CH 2 -as well as to the number of hydrogen atoms, n H , belonging to the skeleton of the molecule. In the case of alkylated uracils a difference was observed in the values at infinite dilution V 2 o and C p2 o , depending on the substitution of alkyl and cyclooligomethylene groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00648976
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  • 8
    Electronic Resource
    Electronic Resource
    Limiting partial molar excess enthalpies by flow calorimetry: Some organic solvents in water (1994)
    Springer
    Journal of solution chemistry 23 (1994), S. 889-900 
    Details
    ISSN: 1572-8927
    Keywords: Excess enthalpy ; enthalpy of solution ; infinite dilution ; organic solvents ; aqueous solution
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract A Picker flow microcalorimeter was employed in conjunction with asymmetric syringe-type pumps to measure heats of mixing of highly dilute aqueous solutions of organic solvents. These data were used in turn to determine limiting partial molar excess enthalpies of the examined solvents in water. The measurements were carried out at 298.15 K for 29 common, oxygen and/or nitrogen containing solvents exhibiting complete miscibility with water. Except for only one compound, formamide, the limiting partial molar excess enthalpies are exothermic indicating that the process of dissolution is energetically favored. Comparison to literature data (in most cases to solution enthalpies at infinite dilution measured by batch calorimetry) proved the technique applied to be sufficiently accurate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00972752
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  • 9
    Electronic Resource
    Electronic Resource
    Role of alcohol in microemulsions as determined from volume and heat capacity data for the water-sodium dodecylsulfate -n-butanol system at 25°C (1982)
    Springer
    Journal of solution chemistry 11 (1982), S. 357-375 
    Details
    ISSN: 1572-8927
    Keywords: Ternary aqueous micellar system ; ionic surfactant ; sodium dodecylsulfate ; n-butanol ; density ; apparent molar volumes ; volumetric and apparent molar heat capacities ; mixed micelles
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Densities and heat capacities of the ternary system water-sodium dodecylsulfate — n-butanol were measured at 25°C over the complete alcohol mole-fraction or solubility range. Apparent and partial molar volumes and heat capacities of n-butanol were derived and have been analyzed as a function of the concentration of both the surfactant and the alcohol. Characteristic changes suggest that, at low concentrations, n-butanol is partially solubilized in mixed micelles but, in concentrated alcohol solutions, n-butanol largely exists in the form of microaggregates stabilized by the surfactant. Results would also suggest that at low concentrations of n-butanol another transition zone occurs in the micellar structure around 0.2–0.3 mol-kg−1 in sodium dodecylsulfate.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00649294
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  • 10
    Electronic Resource
    Electronic Resource
    Chemical equilibrium model for the thermodynamic properties of mixed aqueous micellar systems: Application to thermodynamic functions of transfer (1984)
    Springer
    Journal of solution chemistry 13 (1984), S. 1-25 
    Details
    ISSN: 1572-8927
    Keywords: Mixed micelles ; surfactant ; alcohol-water mixture ; solubilization ; thermodynamic function of transfer ; volume ; enthalpy ; hydrophobic solutes ; heat capacity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract Mixed micelles can be formed in water between various pairs of hydrophobic solutes such as surfactants, alcohols and hydrocarbons. These systems can often be studied through the thermodynamic functions of transfer of one of the solutes, usually kept near infinite dilution, from water to an aqueous solution of the other solute. When mixed micelles are formed, these functions change significantly, and often go through extrema, in the region where the binary system micellizes or undergoes some microphase transition.Three main effects are responsible for the observed trends: pair-wise interactions between both solutes in the monomeric form, a distribution of the reference solute between the aqueous and micellar phases and a shift in the monomer-micelle equilibrium in the vicinity of the reference solute. Simple equations can be derived for these three effects which can account for the sign and magnitude of the observed trends using parameters which are derived for the most part from the two binary systems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00648588
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