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  • 1
    Electronic Resource
    Electronic Resource
    Effects of 17.beta.-estradiol analogs on activation of estrogen response element regulated chloramphenicol acetyltransferase expression (1993)
    s.l. : American Chemical Society
    Biochemistry 32 (1993), S. 7016-7021 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00078a029
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  • 2
    Electronic Resource
    Electronic Resource
    Influence of estrogen structure on nuclear binding and progesterone receptor induction by the receptor complex (1993)
    s.l. : American Chemical Society
    Biochemistry 32 (1993), S. 7002-7008 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00078a027
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  • 3
    Electronic Resource
    Electronic Resource
    Differential induction of pS2 and cathepsin D mRNAs by structurally altered estrogens (1993)
    s.l. : American Chemical Society
    Biochemistry 32 (1993), S. 7009-7015 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00078a028
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  • 4
    Electronic Resource
    Electronic Resource
    Permeability (1945)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Physiology 7 (1945), S. 1-33 
    Details
    ISSN: 0066-4278
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Medicine , Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ph.07.030145.000245
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  • 5
    Electronic Resource
    Electronic Resource
    Liver catalysis in the association of estrogen to protein (1962)
    Springer
    Cellular and molecular life sciences 18 (1962), S. 414-416 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Zusammenfassung Die Inkubation von 16-C14-Oestron und 4-C14-Oestradiol-β-acetat in Puffer (pH 7.4) bei Gegenwart von Rattenleber ergibt elektrophoretisch zwei deutliche radioaktive Bänder. Das erste Band entsteht im Albuminbereich und stimmt mit den früheren Beobachtungen vonSzego undRoberts 2 überein. Das zweite, früher nicht beschriebene Band entsteht deutlich ausserhalb des Albuminbereiches. Beide Kurvengipfel werden mit wenig homogenisierter Rattenleber, die möglichst frei von Mikrosomen ist, gewonnen. Der zweite Gipfelpunkt wird in diesem Fall der obenauf schwimmenden Phase zugeschrieben.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02151493
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  • 6
    Electronic Resource
    Electronic Resource
    Accumulation of Ions by Living Cells (1933)
    [s.l.] : Nature Publishing Group
    Nature 132 (1933), S. 97-98 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] THERE appears to be a growing amount of misunderstanding about the different hypotheses so far offered in the endeavour to account for the accumulation of ions by living cells. As an example I quote from a recent paper by Asprey1 : “It is noteworthy that Briggs2 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/132097b0
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  • 7
    Electronic Resource
    Electronic Resource
    Electrical Potential Differences across Onion Epidermis (1932)
    [s.l.] : Nature Publishing Group
    Nature 129 (1932), S. 724-725 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] R. J. PUMPHREY, in a careful investigation,1 has found constant electrical potential differences across epidermis stripped from the bulb scales of onions when this membrane separated unlike solutions of electrolytes. We, on the other hand, had previously observed under similar ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/129724d0
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  • 8
    Electronic Resource
    Electronic Resource
    Bioelectric potentials in Nitella (1928)
    Springer
    Protoplasma 5 (1928), S. 86-96 
    Details
    ISSN: 1615-6102
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary (1) Potential differences between two microelectrodes, one in the protoplasm ofNitella and one just outside the cell have been measured. (2) The potential difference increases with increase in size of the cells studied in tap water or in .001 M NaCl from 15 m. v. for a cell volume of about 0·5 mm3 to about 40 m. v. for cells of 3 mm3 in volume. Larger cells showed irregular potential differences mostly less than 40 m. v. (3) The potential differences yielded by cells immersed in artificialNitella sap was 7 m. v.; dilution of the sap to 3/4, 1/2, or 1/4 strength led to successively greater potential differences approaching as a limit the figure for cells of similar size in tap water or .001 M NaCl. (4) Theoretical implications are discussed briefly.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01604591
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  • 9
    Electronic Resource
    Electronic Resource
    The penetration of radioactive sodium intoValonia andHalicystis (1953)
    Springer
    Protoplasma 42 (1953), S. 63-68 
    Details
    ISSN: 1615-6102
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Conclusions In comparing the uptake of Na* byValonia and that byHalicystis, it was found that the greater proportion was taken up by the protoplasm in the former case, and by the sap in the latter case. In former experiments only the sap was tested for penetration and found to contain negligible concentrations of Na inValonia and comparatively larger concentrations inHalicystis. It is therefore of interest to show that Na* does penetrateValonia but is taken up by the protoplasm considerable concentrations; but that it does not pass into the sap under normal conditions, thereby showing that the semi-permeable membrane between the sap and the protoplasm is the region of non-penetration. InHalicystis this is not the case since Na* was found in both the sap and the protoplasm of this cell. Further work on the difference between these two membranes would be of interest in elucidating the movement of K and Na ions through membranes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01248656
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  • 10
    Electronic Resource
    Electronic Resource
    The accumulation of ions in living cells-a non-equilibrium condition (1929)
    Springer
    Protoplasma 8 (1929), S. 389-412 
    Details
    ISSN: 1615-6102
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary 1. Living cells ofValonia macrophysa Kütz were exposed for different lengths of time to sea water in which the proportion of potassium had been increased or decreased by the addition of isotonic KC1 or NaCl solutions. 2. The concentration of potassium in the sap ordinarily increased more than that of sodium or chloride regardless of whether it was present in more or less than normal concentration in the surrounding solution. 3. The chloride concentration in the sap ordinarily changed in much the same way as the potassium concentration, but to a significantly smaller extent. 4. The sodium concentration appears to have first increased and then decreased, depending upon the length of exposure and the extent to which the sea water was altered. 5. This may be explained by supposing: (a) the cell to be normally in a non-equilibrium condition with respect to the surrounding solution; (b) to be surrounded by a plasma membrane consisting of a mosaic of anion-permeable and cation-permeable areas which are of the nature of charged porous films, and as such exaggerate differences between the diffusion velocities of the ions to which they are permeable; (c) that the diameters of the pores are variable according to experimental conditions; (d) that the penetrabilities of different ions are characteristic functions of their own effective diameters and of the diameters of the pores in the membranes. 6. This theory is shown to explain more or less completely also the intake of ions by plants, the changes in morphology of green algae grown in darkness, the characteristic ion content of erythrocytes and of neoplastic cells, and the relation between glycolysis and growth of neoplasms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01598929
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