Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    A pattern of optic axons in the normal goldfish tectum consistent with the caudal migration of optic terminals during development (1983)
    Springer
    Experimental brain research 52 (1983), S. 147-151 
    Details
    ISSN: 1432-1106
    Keywords: Optic axons ; Normal development ; Synaptic plasticity ; Goldfish
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Optic axons were cut in the goldfish optic nerve or tectum, filled with horseradish peroxidase and traced in tectal wholemounts. Many of them ran in conspicuous fascicles which curved across the tectum. Axons from central nasal retina, which ran in the most rostral fascicles, turned abruptly as they left these fascicles; ran caudally in a diffuse, parallel array for up to half the tectal length; and passed beneath more caudal fascicles to innervate the caudal half-tectum. Axons from peripheral nasal retina ran in the most caudal fascicles and terminated near their turning-points. Axons from temporal retina entered the tectum at its rostral margin and ran caudally from their points of entry to innervate the rostral halftectum. The resultant pattern was entirely consistent with the proposal that a slow caudal migration of optic terminals compensates during normal development for disparate modes of retinal and tectal growth.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00237159
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Tectal paths of regenerated optic axons in the goldfish: Evidence from retrograde labelling with horseradish peroxidase (1983)
    Springer
    Experimental brain research 51 (1983), S. 433-442 
    Details
    ISSN: 1432-1106
    Keywords: Optic axons ; Regeneration ; Optictectum ; Retrograde tracing ; Goldfish
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary To compare the distributions of normal and regenerated optic axons in the goldfish tectum, small groups of axons crossing the rostromedial tectum were cut and filled with horseradish peroxidase which subsequently revealed the retinal locations of their somata. In normal fish, the peroxidase-filled ganglion cells were virtually confined to a narrow arc spanning the ventronasal quadrant of the retina. In fish with regenerated visual projections (50–736 days after optic nerve transection, optic nerve crush or deflection of optic axons to the ipsilateral tectum) the filled cells were distributed across the full extent of the retina from centre to periphery and were less rigidly confined within appropriate quadrants. The absence of any detectable arc of filled cells in the ventronasal quadrant after regeneration showed that few, if any, of the regenerated axons followed their original paths across the tectum. Quantitative analysis of local cell distributions indicated that axons were re-routed independently rather than in groups. Nevertheless, axons consistently displayed a crude bias towards appropriate tectal regions, even in ipsilateral tecta where the relative positions of these regions are inverted. These results imply that regenerating optic axons are widely scattered by the effects of surgery. They may subsequently show preferences for appropriate central paths but with a resolution too low to define much more than the orientation of the retino-tectal map. Since there is both anatomical and electrophysiological evidence that regenerated optic terminal arborizations eventually adopt a precise retinotopic arrangement, this arrangement must chiefly reflect ordering mechanisms which act in the final stages of axon growth or synapsis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00237880
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Factors affecting pH-dependent photo-inhibition of division in Euglena gracilis (1973)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 82 (1973), S. 489-495 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Visible light of moderate intensity (1200 ft-cd) can severely inhibit cell division of a non-photosynthetic mutant of Euglena gracilis when growth is supported by butanol, ethanol, or fumarate as sole carbon source. The degree of inhibition is pH dependent, being greatest at pH 4 to 5. A wide variety of other carbon sources permitted growth in the light without inhibition.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1040820317
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Culture pH, CO2 tension, and cell division in Euglena gracilis ZThis work was supported by United States Public Health Service Grant GM-12179 to Dr. J. R. Cook. (1978)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 96 (1978), S. 253-259 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Growth characteristics of Euglena gracilis Z as functions of culture pH, CO2 tension, temperature, and lighting regime were investigated. The results are consistent with the possibility that cell division is preceded by a lowered intracellular pH. Also consistent with this possibility is the finding that division rhythmicity can be induced by periodic changes in CO2 tension. It is suggested that the rhythmicity is induced by changes in intracellular pH produced by carbonic acid.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1040960214
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Photo-inhibition of cell division and growth in euglenoid flagellates (1968)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 71 (1968), S. 177-184 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Visible light of moderate intensity causes two and perhaps three types of division inhibition in Euglena gracilis are related cells. Fluorescent light causes a general inhibition of growth and division which is temperature-dependent. Pigmentation or complex organic media partially lifts this inhibition. A second type of inhibition, which is transient, can be caused by either fluorescent or incandescent light, and is found with an irreversibly bleached strain of Euglena grown on a limiting concentration of acetate; this inhibition could not be demonstrated in cells grown on limiting concentrations of glucose.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1040710209
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Factors affecting division rhythmicity in Euglena gracilis (1974)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 84 (1974), S. 291-299 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: In phototrophic culture of Euglena gracilis, good synchrony was found only under rather restricted programs of light-dark cycles, and rather narrow ranges of temperature and light intensity, when cultures were flushed with air fortified with adequate amounts of CO2. When flushed with air alone, CO2 was found to be limiting, and while cell divisions were rhythmic, less than a doubling of cell number occurred in division bursts. With air as gas phase, rhythmic division activity was maintained over wide ranges of temperature, light intensity, and the ratio of light:dark in a given program; all these factors affected the amplitude of the division burst, however.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1040840215
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Influence of culture pH on photo-inhibition of division in Euglena gracilis (1971)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 78 (1971), S. 273-276 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: In the dark, growth rates of Euglena gracilis were independent of culture pH between the limits of three to eight. Visible light of moderate intensity inhibited growth rates, with the degree of inhibition being markedly pH dependent. The most severe inhibition was observed at pH 4 to 5, with little or no inhibition at pH 3 or above pH 6.8 at the light intensity used (400 foot-candles).
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1040780215
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...