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  • 1
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 240 (1972), S. 48-50 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The human bones were exposed in the calcreted horizon of the Mungo unit from which the overlying Zanci aeolian sediments3 had been stripped by erosion (Figs. 2, 3). Before terminal burial in a shallow grave the body had been burnt and the resulting charred bones extensively smashed. Reconstruction ...
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 213 (1967), S. 152-154 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Human bones and implements in the Keilor Terrace of the Maribyrnong River, near Melbourne, provide new evidence of the antiquity of man in ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 232 (1971), S. 330-332 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The lake occupies the crater of a maar-a volcanic eruption crater lying below the general level of the surrounding country and surrounded by a low tuff ring. The crater forms an internal drainage basin 1.8 km in diameter; it has a catchment area of 4.2 km2 and is controlled by a relatively simple ...
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  • 4
    ISSN: 1432-1424
    Keywords: Toad bladder ; Voltage-clamping ; Vasopressin ; Ouabain ; Cell volume ; X-ray microanalysis
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Toad urinary bladder epithelial cells were incubated in Na Ringer's with the serosal surface of the epithelium clamped at either +50 mV, O mV (short-circuited) or −50 mV with respect to the mucosal surface. Following incubation, portions of tissue were coated with an external albumin standard and rapidly frozen. Cryosections were freeze-dried and cell composition determined by x-ray microanalysis. Cell water and ion contents were unaffected when tissues were short-circuited rather than clamped close to their open-circuit potential difference (+50 mV). Incubation with vasopressin at +50 mV, and under short-circuit conditions, caused Na uptake without cell swelling or gain in Cl. Clamping at −50 mV resulted in uptake of water and ions, with considerable variation from cell to cell. These variations in cell composition were exacerbated by vasopressin. The greater the increase in water content, the greater the rise in cell Cl. However, there was no consistent pattern to the associated changes in cation contents. Most cells gained some Na. In some cells, this gain was accompanied by an increase in K. In others, the gain of Na was predominant and cell K content actually fell. At −50 mV with ouabain, many of the cells also gained water. As was found in our earlier study with ouabain under short circuit conditions (Bowler et al., 1991), there was considerable variation in the extent of the Na gain and K loss; some cells were largely depleted of K while in others the K content remained relatively normal. These results indicate differences between granular cells in the availabilities in the plasma membranes of ion pathways, either as a consequence of differences in the numbers of such pathways or in their control.
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  • 5
    ISSN: 1432-1424
    Keywords: Cell Cl ; Cl/HCO3 exchanger ; Toad bladder ; X-ray microanalysis ; Cell volume
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Relationships between short-circuit current (I sc), cell Cl and the mechanism(s) of Cl accumulation in toad bladder epithelial cells were investigated. In serosal Cl-free gluconate Ringer, 80% of the cell Cl (measured by x-ray microanalysis) was lost over 30–60 min with an associated decrease in cell water content. Concomitantly, I sc fell to 20% of its initial value within 10 min but then recovered to 45% of its initial value despite continued Cl loss. With the reintroduction of Cl, cell Cl and I sc both recovered within 10 min. Serosal SITS (4 acetamido-4′-isothiocyano-stilbene-2,2′-disulfonate; 0.5 mm) plus bumetanide (0.1 mm), did not prevent the fall in I sc or the loss of cell Cl in gluconate medium, although they did inhibit subsequent recovery of I sc in this medium. They also prevented the recovery of I sc in Cl medium but not the reaccumulation of Cl by the cells. Although SITS and bumetanide did not prevent the loss or recovery of Cl, they modified the pattern of the ion changes. In their absence, changes in cellular Cl were twice that of the changes in measured cellular cations implicating basolateral Cl/HCO3 exchange in Cl movement. With SITS plus bumetanide present, changes of similar magnitude in Cl were associated with equivalent changes in cation, consistent with the inhibition of Cl/ HCO3 exchange.
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Hydrobiologia 81-82 (1981), S. 431-444 
    ISSN: 1573-5117
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Type of Medium: Electronic Resource
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