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  • Articles  (5)
  • Latest Papers from Table of Contents or Articles in Press  (5)
  • Open Access-Papers
  • Electric Conductivity  (5)
  • 1980-1984  (5)
  • 1970-1974
  • 1965-1969
  • 1945-1949
  • 1981  (5)
  • Science. 211(4479): 294-7.  (1)
  • Science. 211(4483): 712-5.  (1)
  • Science. 212(4498): 1063-5.  (1)
  • Science. 212(4499): 1155-7.  (1)
  • Science. 212(4501): 1409-11.  (1)
  • 25
Collection
  • Articles  (5)
Source
  • Latest Papers from Table of Contents or Articles in Press  (5)
  • Open Access-Papers
Keywords
Publisher
Years
  • 1980-1984  (5)
  • 1970-1974
  • 1965-1969
  • 1945-1949
Year
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  • 1
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    Myelinated central vertebrate axon lacks voltage-sensitive potassium conductance (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-05-29
    Description: Intracellular recordings were obtained from the goldfish Mauthner cell soma and axon before and after intracellular iontophoresis of drugs that block voltage-sensitive potassium conductance. Analysis of the action potentials generated by the axon hillock-initial segment and by the axon suggest that axonal impulses lack this potassium conductance. Thus, impulse repolarization in the Mauthner axon, and perhaps in other vertebrate central axons, may not involve an active potassium current.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Kaars, C -- Faber, D S -- NS 15335/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 May 29;212(4498):1063-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233201" target="_blank"〉PubMed〈/a〉
    Keywords: 4-Aminopyridine ; Action Potentials/drug effects ; Aminopyridines/pharmacology ; Animals ; Axons/drug effects/*physiology ; Electric Conductivity ; Goldfish ; Myelin Sheath/drug effects/*physiology ; Potassium/*pharmacology ; Tetraethylammonium Compounds/pharmacology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 2
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    Phase relationships between adjacent simple cells in the visual cortex (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-06-19
    Description: Adjacent simple cells recorded and "isolated" simultaneously from the same microelectrode placement were usually tuned to the same orientation and spatial frequency. The responses of the members of these "spatial frequency pairs" to drifting sine-wave gratings were cross-correlates. Within the middle range of the spatial frequency selectivity curves, the responses of the paired cells differed in phase by approximately 90 percent. This phase relationship suggests that adjacent simple cells tuned to the same spatial frequency and orientation represent paired sine and cosine filters in terms of their processing of afferent spatial inputs and truncated sine and cosine filters in terms of the output of simple cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Pollen, D A -- Ronner, S F -- EY00597/EY/NEI NIH HHS/ -- EY03290/EY/NEI NIH HHS/ -- New York, N.Y. -- Science. 1981 Jun 19;212(4501):1409-11.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7233231" target="_blank"〉PubMed〈/a〉
    Keywords: Animals ; Computers ; Electric Conductivity ; Microelectrodes ; Visual Cortex/*physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 3
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    Calcium spike electrogenesis and other electrical activity in continuously cultured small cell carcinoma of the lung (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-06-05
    Description: Spike electrogenesis, local depolarizing and hyperpolarizing responses, spontaneous rhythmic firing, and alternating resting potentials were measured in cells from a continuously cultured small cell carcinoma of the lung. Spike generation was blocked by MnCl2. In view of this evidence for calcium-spike electrogenesis and previous evidence of secretory activity in these cells, this cell line (DMS 53) can provide a model for the study of excitation-secretion behavior in human neoplastic cells.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉McCann, F V -- Pettengill, O S -- Cole, J J -- Russell, J A -- Sorenson, G D -- CA 25845/CA/NCI NIH HHS/ -- DA 23108/DA/NIDA NIH HHS/ -- New York, N.Y. -- Science. 1981 Jun 5;212(4499):1155-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6262914" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials/drug effects ; Calcium/pharmacology ; Carcinoma, Small Cell/*physiopathology ; Cells, Cultured ; Electric Conductivity ; Humans ; Lung Neoplasms/*physiopathology ; Manganese/pharmacology ; Membrane Potentials/drug effects
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 4
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    Giant synaptic potential hypothesis for epileptiform activity (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-01-16
    Description: According to one hypothesis, the paroxysmal depolarizing shift observed in the penicillin model of epilepsy results from a giant excitatory postsynaptic potential. This hypothesis has recently been questioned, primarily because it has never been subjected to rigorous experimental examination. Four quantitative predictions were derived from this hypothesis and tested in CA3 pyramidal neurons of the hippocampus. The four critical predictions concern the behavior of the paroxysmal depolarizing shift under current- and voltage-clamp conditions as a function of membrane potential. The experiments confirmed all four predictions.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Johnston, D -- Brown, T H -- NS11535/NS/NINDS NIH HHS/ -- NS15772/NS/NINDS NIH HHS/ -- RR-05471-17/RR/NCRR NIH HHS/ -- New York, N.Y. -- Science. 1981 Jan 16;211(4479):294-7.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/7444469" target="_blank"〉PubMed〈/a〉
    Keywords: Action Potentials ; Animals ; Disease Models, Animal ; Electric Conductivity ; Epilepsy/*physiopathology ; Guinea Pigs ; Hippocampus/*physiopathology ; In Vitro Techniques ; Membrane Potentials ; Penicillin G ; Synaptic Membranes/physiology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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  • 5
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    Gap junctional conductance is a simple and sensitive function of intracellular pH (1981)
    American Association for the Advancement of Science (AAAS)
    Details
    Publication Date: 1981-02-13
    Description: The pH of the cytoplasm (pHt) measured with pH-sensitive microelectrodes in cleavage-stage blastomeres of amphibian (Ambystoma) and teleost (Fundulus) embryos is about 7.7. In electrotonically coupled cell pairs, junctional conductance is rapidly and reversibly reduced by acidification of the cytoplasm. The relation between junctional conductance and pHi is the same for increasing and decreasing pH and is independent of the rate of change over a wide range. The relation is well fitted by a Hill curve with K = 50 nM (pK = 7.3) and n = 4 to 5. The closure of gap junction channels at low pHi appears to be a cooperative process involving several charged sites. The absence of hysteresis and identity of effects for fast and slow pHi changes implies that protons act directly on the channel macromolecules and not through an intermediate in the cytoplasm.〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Spray, D C -- Harris, A L -- Bennett, M V -- HD-02428/HD/NICHD NIH HHS/ -- NS-07512/NS/NINDS NIH HHS/ -- NS-12627/NS/NINDS NIH HHS/ -- New York, N.Y. -- Science. 1981 Feb 13;211(4483):712-5.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6779379" target="_blank"〉PubMed〈/a〉
    Keywords: Ambystoma/embryology ; Animals ; Carbon Dioxide ; *Cell Communication ; Cytoplasm/*physiology ; Electric Conductivity ; *Hydrogen-Ion Concentration ; Intercellular Junctions/*physiology ; Killifishes/embryology
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
    Published by American Association for the Advancement of Science (AAAS)
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