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  • 1985-1989  (1)
  • 1950-1954  (11)
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  • 1
    Digitale Medien
    Digitale Medien
    Size Distribution Analysis in Plasma Extender Systems. I. Gelatin (1954)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 58 (1954), S. 774-782 
    Details
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/j150519a018
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  • 2
    Digitale Medien
    Digitale Medien
    Size Distribution Analysis in Plasma Extender Systems (1954)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 58 (1954), S. 854-859 
    Details
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/j150520a013
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  • 3
    Digitale Medien
    Digitale Medien
    BOUNDARY SPREADING IN SEDIMENTATION VELOCITY EXPERIMENTS (1950)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 72 (1950), S. 4325-4325 
    Details
    ISSN: 1520-5126
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ja01165a554
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  • 4
    Digitale Medien
    Digitale Medien
    THE VALENCE OF PRECIPITATING ANTIBODIES (1952)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 74 (1952), S. 1362-1363 
    Details
    ISSN: 1520-5126
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ja01125a526
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  • 5
    Digitale Medien
    Digitale Medien
    Boundary Spreading in Sedimentation Velocity Experiments. I. The Enzymatic Degradation of Serum Globulins (1952)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 74 (1952), S. 1542-1548 
    Details
    ISSN: 1520-5126
    Quelle: ACS Legacy Archives
    Thema: Chemie und Pharmazie
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1021/ja01126a059
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  • 6
    Digitale Medien
    Digitale Medien
    Colloid Chemistry (1951)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Physical Chemistry 2 (1951), S. 403-424 
    Details
    ISSN: 0066-426X
    Quelle: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1146/annurev.pc.02.100151.002155
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  • 7
    Digitale Medien
    Digitale Medien
    X-chromosome inactivation in cultured cells from human chorionic villi (1989)
    Springer
    Somatic cell and molecular genetics 15 (1989), S. 131-136 
    Details
    ISSN: 1572-9931
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Abstract X-chromosome inactivation was investigated in human chorionic villi in the first trimester of pregnancy and cultured cells established from them. Expression of glucose-6-phosphate dehydrogenase (G6PD) was evaluated in these extraembryonic cells from four females heterozygous for the electrophoretic variants (AB) of G6PD. In each case the uncultured villi as well as derived cultured cells expressed the AB phenotype for G6PD with about equal intensity for the A and B bands. Single-cell-derived clones established from two of the four cases expressed either G6PD A or B. One clone expressing G6PD B was fused with mouse cells, and a hybrid clone retaining the inactive human X chromosome was isolated; there was no evidence of human G6PD expression in this clone retaining an inactive human X. DNA methylation in the first intron of the human gene for hypoxanthine phosphoribosyltransferase (HPRT) was evaluated in the four pairs of cultured villi and fetal cells. No differences were detected between the cultured villi and fetal cells as they all showed bands characteristic of an inactive X from somatic cells. These results show that there is no preferential inactivation of an X in the majority of cells that constitute human tertiary chorionic villi or in cultured cells derived from them. Long-term cultures established from chorionic villi appear to be no different from somatic cells with respect to X-chromosome inactivation.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01535073
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  • 8
    Digitale Medien
    Digitale Medien
    Sedimentation analysis and some related problems (1954)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 12 (1954), S. 351-378 
    Details
    ISSN: 0022-3832
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: With the development of the ultracentrifuge by Svedberg there was provided a group of methods for the determination of solute molecular weight and of distribution of molecular weights in proper solutions. In addition to the sedimentation equilibrium and the sedimentation velocity experiments, there are other closely related molecular kinetic phenomena which, when taken together, form a collection of very useful tools in an area of macromolecular chemistry.The principal past use of the ultracentrifuge has been in the determination of the molecular weight and the homogeneity of proteins. In this report the attempt has been made to point the way for concerted action in the return to the original problem-that of investigating the dispersity of macromolecular and other colloidal solutions. Among other things, there is proposed in outline a combination of the sedimentation velocity and sedimentation equilibrium experiments to provide mass distribution data in macromolecular systems. While the main emphasis is devoted to the theory of the sedimentation methods and their unique usefulness to this end, there have been presented shorter discussions of diffusion and osmotic pressure as such and in their relationships to the sedimentation problems.Recognition is also made of the fact that the optical systems for the study of the redistribution of the components in the diffusion and sedimentation cells are now in a state of change, with a rapid adaptation of several interference methods to take the place of the more classical refractometric schemes. The change is being made in the interest of a greatly enhanced accuracy, even to the point that diffusion behavior in systems which contain two solutes can properly be observed.
    Zusätzliches Material: 1 Ill.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1954.120120129
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  • 9
    Digitale Medien
    Digitale Medien
    Effect of solvation on sedimentation experimentsThis research was supported in part by contract N8onr76300, Office of Naval Research. (1952)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 8 (1952), S. 449-456 
    Details
    ISSN: 0022-3832
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Notizen: The sedimentation equilibrium of polymers in mixed solvents at infinite dilution of polymer was analyzed by thermodynamic methods equivalent to those used by Stockmayer and Kirkwood and Goldberg for the light scattering case. It was found that the apparent weight-average molecular weight in a binary solvent mixture (when nonrefractometric methods are used to measure the experimental concentration gradient) is formally identical with that derived by Lansing and Kraemer on the assumption of stoichiometric combination of one of the solvents with the polymer. The “solvation number” now actually measures a preference for one solvent and can be expressed in terms of thermodynamic quantities characteristic of the ternary polymer-solvent system. In the case of refractometric measurements, where the two solvents have different refractive indices, refraction terms similar to those encountered in light scattering theory for mixed solvents also enter. Under equilibrium conditions, for polymer solutions in pure solvents, thermodynamics can say nothing about “solvation,” which is inseparable from the over-all nonideal behavior at finite concentrations. There is strong reason to believe that all types of experiments designed to measure solvation in mixed solvents under equilibrium conditions must give the same answer, since the same thermodynamic quantities determine polymer-solvent interactions in all cases. By assuming a dynamic equilibrium between sedimentation and diffusion in the equilibrium case and using the sedimentation term for the sedimentation velocity case, an expression for the sedimentation constant in mixed solvents at infinite dilution of polymer has been obtained. This expression is almost the same as that previously derived by Schachman and Lauffer, the difference occurring in an assumption about the density of solvated liquid made by these authors.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1952.120080501
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  • 10
    Digitale Medien
    Digitale Medien
    Effect of solvation on sedimentation experiments (1954)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Polymer Science 13 (1954), S. 460-460 
    Details
    ISSN: 0022-3832
    Schlagwort(e): Chemistry ; Polymer and Materials Science
    Quelle: Wiley InterScience Backfile Collection 1832-2000
    Thema: Chemie und Pharmazie , Physik
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1002/pol.1954.120137104
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