Author: C. O. Timmons
Publisher:
ISBN:
Category :
Languages : en
Pages : 20
Book Description
An investigation was made of the effect of chain length and solubility upon the spreading on water of the homologous series of pure normal alcohols from 1-butanol to 1-decanol. Spreading pressures were measured at 20C using the piston-monolayer method. Each measured value corresponded to the semi-initial spreading pressure, which was equal, within experimental error, to the initial spreading pressure. Surface tensions of these alcohols were measured, as were the interfacial tensions with water. It is concluded that the spreading pressure of each alcohol, together with its surface tension, can be used to calculate reliably the interfacial tension and the reversible work of adhesion to water. Data for the spreading pressures on water of a variety of organic liquids are also given. With these data and literature values of the liquid surface tensions, calculations were made of the interfacial tensions and work of adhesion by means of the equations published by Pomerantz, Clinton, and Zisman. The calculated interfacial tension was plotted as a function of the best available literature value of the solubility of water in each organic liquid. Our results agreed well with Donahue and Bartell's logarithmic relationship between the interfacial tension and the degree of miscibility. A relationship is given from which solubility can be estimated from interfacial tension. Finally, the relation between the molar work of adhesion to water and the constitution of the adsorbed organic molecules is discussed. (Author).
The Relation of Initial Spreading Pressure of Polar Compounds on Water to Interfacial Tension, Work of Adhesion, and Solubility
Author: C. O. Timmons
Publisher:
ISBN:
Category :
Languages : en
Pages : 20
Book Description
An investigation was made of the effect of chain length and solubility upon the spreading on water of the homologous series of pure normal alcohols from 1-butanol to 1-decanol. Spreading pressures were measured at 20C using the piston-monolayer method. Each measured value corresponded to the semi-initial spreading pressure, which was equal, within experimental error, to the initial spreading pressure. Surface tensions of these alcohols were measured, as were the interfacial tensions with water. It is concluded that the spreading pressure of each alcohol, together with its surface tension, can be used to calculate reliably the interfacial tension and the reversible work of adhesion to water. Data for the spreading pressures on water of a variety of organic liquids are also given. With these data and literature values of the liquid surface tensions, calculations were made of the interfacial tensions and work of adhesion by means of the equations published by Pomerantz, Clinton, and Zisman. The calculated interfacial tension was plotted as a function of the best available literature value of the solubility of water in each organic liquid. Our results agreed well with Donahue and Bartell's logarithmic relationship between the interfacial tension and the degree of miscibility. A relationship is given from which solubility can be estimated from interfacial tension. Finally, the relation between the molar work of adhesion to water and the constitution of the adsorbed organic molecules is discussed. (Author).
Publisher:
ISBN:
Category :
Languages : en
Pages : 20
Book Description
An investigation was made of the effect of chain length and solubility upon the spreading on water of the homologous series of pure normal alcohols from 1-butanol to 1-decanol. Spreading pressures were measured at 20C using the piston-monolayer method. Each measured value corresponded to the semi-initial spreading pressure, which was equal, within experimental error, to the initial spreading pressure. Surface tensions of these alcohols were measured, as were the interfacial tensions with water. It is concluded that the spreading pressure of each alcohol, together with its surface tension, can be used to calculate reliably the interfacial tension and the reversible work of adhesion to water. Data for the spreading pressures on water of a variety of organic liquids are also given. With these data and literature values of the liquid surface tensions, calculations were made of the interfacial tensions and work of adhesion by means of the equations published by Pomerantz, Clinton, and Zisman. The calculated interfacial tension was plotted as a function of the best available literature value of the solubility of water in each organic liquid. Our results agreed well with Donahue and Bartell's logarithmic relationship between the interfacial tension and the degree of miscibility. A relationship is given from which solubility can be estimated from interfacial tension. Finally, the relation between the molar work of adhesion to water and the constitution of the adsorbed organic molecules is discussed. (Author).
Report of NRL Progress
Author: Naval Research Laboratory (U.S.)
Publisher:
ISBN:
Category : Naval research
Languages : en
Pages : 558
Book Description
Publisher:
ISBN:
Category : Naval research
Languages : en
Pages : 558
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 822
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 822
Book Description
Monthly Catalog, United States Public Documents
Author: United States. Superintendent of Documents
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1716
Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Publisher:
ISBN:
Category : Government publications
Languages : en
Pages : 1716
Book Description
February issue includes Appendix entitled Directory of United States Government periodicals and subscription publications; September issue includes List of depository libraries; June and December issues include semiannual index
Understanding Tuberculosis
Author: Pere-Joan Cardona
Publisher: BoD – Books on Demand
ISBN: 9533079460
Category : Medical
Languages : en
Pages : 348
Book Description
Mycobacterium tuberculosis, as recent investigations demonstrate, has a complex signaling expression, which allows its close interaction with the environment and one of its most renowned properties: the ability to persist for long periods of time under a non-replicative status. Although this skill is well characterized in other bacteria, the intrinsically very slow growth rate of Mycobium tuberculosis, together with a very thick and complex cell wall, makes this pathogen specially adapted to the stress that could be generated by the host against them. In this book, different aspects of these properties are displayed by specialists in the field.
Publisher: BoD – Books on Demand
ISBN: 9533079460
Category : Medical
Languages : en
Pages : 348
Book Description
Mycobacterium tuberculosis, as recent investigations demonstrate, has a complex signaling expression, which allows its close interaction with the environment and one of its most renowned properties: the ability to persist for long periods of time under a non-replicative status. Although this skill is well characterized in other bacteria, the intrinsically very slow growth rate of Mycobium tuberculosis, together with a very thick and complex cell wall, makes this pathogen specially adapted to the stress that could be generated by the host against them. In this book, different aspects of these properties are displayed by specialists in the field.
Annual Report
Author:
Publisher:
ISBN:
Category : Naval research
Languages : en
Pages : 430
Book Description
Publisher:
ISBN:
Category : Naval research
Languages : en
Pages : 430
Book Description
Government Reports Announcements & Index
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1130
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1130
Book Description
Bibliography of Scientific and Industrial Reports
Author:
Publisher:
ISBN:
Category : Technology
Languages : en
Pages : 762
Book Description
Publisher:
ISBN:
Category : Technology
Languages : en
Pages : 762
Book Description
U.S. Government Research & Development Reports
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 840
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 840
Book Description
U. S. Government Research and Development Reports
Author:
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1140
Book Description
Publisher:
ISBN:
Category : Science
Languages : en
Pages : 1140
Book Description