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  • 1
    Electronic Resource
    Electronic Resource
    Catecholaminergic responses of neonatal adrenal gland to insulin (1988)
    Springer
    Journal of neural transmission 73 (1988), S. 115-120 
    Details
    ISSN: 1435-1463
    Keywords: Neonatal adrenal ; catecholamines ; insulin
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In the present work we study a sequential degree of response to insulin (0.001 IU/g body weight) in neonatal rats, using as parameters the blood glucose and the adrenal catecholamine levels. In 1-day and 90-day-old rats treated by insulin the glycemia showed a more marked fall than the rest of neonates. After insulin administration noradrenaline content did not show differences between control and treated rats. In contrast, adrenaline depletion was significant in adults (62.20%) and in neonates of 7 and 10 days of age (45% and 35.5%, respectively). No significant decrease of the amine was observed in the younger rats (1 to 4-days-old). This response to insulin probably depends on the gradual maturation and innervation of the adrenal chromaffin tissue.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01243382
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Hydroxyindole-O-methyltransferase (HIOMT), catechol-O-methyltransferase (COMT) and histamine-N-methyl-transferase (HNMT) in the pineal gland of the vizcacha (1980)
    Springer
    Journal of neural transmission 47 (1980), S. 23-28 
    Details
    ISSN: 1435-1463
    Keywords: Pineal gland ; vizcacha ; methylating enzymes
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The activities of three methylating enzymes HIOMT, COMT, and HNMT were determined in pineal glands from 2 groups of adult vizcachas of both sexes, one (I) maintained under permanent lighting (15 days) and the other (II) kept in darkness. The control determinations (III) were carried out in pineal glands from animals hunted and killed during the night. In (I) the HIOMT activity decreased and the COMT activity increased; no changes were exhibited by HNMT. In (II) showed a diminished HIOMT activity. In captivity illumination affected HIOMT and COMT activities in a similar form to that observed in other species of rodents. The decrease in HIOMT activity in (II) suggests that captivity may affect pineal function, possibly as a consequence of a decrease in locomotor activity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01256636
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Dispersed cell culture of bovine pars intermedia (1973)
    Springer
    Cellular and molecular life sciences 29 (1973), S. 697-698 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Resumen Células de pars intermedia bovina, dispersas por tripsina y cultivadas por 60 dias mantienen las caracteristicas morfológicas del tipo glandular descripto in vivo. Los medios muestran actividad melanocito-dispersante sobre la piel deRana pipiens. Estos resultados sugieren que las células cultivadas retienen la específica capacidad de sintetizar MSH.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01944782
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Organelle transport in constricted nerve fibers of the toad Bufo arenarum hensel (1970)
    Springer
    Cell & tissue research 104 (1970), S. 419-428 
    Details
    ISSN: 1432-0878
    Keywords: Constricted axons ; Organelle transport ; Ultrastructure ; Toads
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The splanchnic nerves of toads were tightly ligated and the organelles present both on the proximal and the distal side of the constriction were counted after zero, 24 and 48 hrs. Swelling of the fibers and accumulation of mitochondria and of smooth canaliculi were found to be the most conspicuous expressions of damming in the nerve segments above the constriction. No changes in the microtubule population or in the ratio of dense-core microtubules to empty microtubules were observed. A progressive collection of granulated vesicles is described for a minority of fibers in the segment proximal to the ligature. Evidence is presented in support of the view that such granulated vesicles are budded from swollen canaliculi. Fine structural expressions of damming were not found in the nerve segments distal to the constriction.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00335692
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Studies on the pararenal ganglion of the toadBufo arenarum Hensel (1968)
    Springer
    Cell & tissue research 88 (1968), S. 180-186 
    Details
    ISSN: 1432-0878
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The present report is a description of an abdominal sympathetic ganglion in close proximity to the kidneys (pararenal ganglion), which occurs in the toad. It is apparently associated with the splanchnic nerves and consists of: 1. typical ganglion cells; 2. myelinated and unmyelinated nerve fibers, some of which form axosomatic synapses (cholinergic junctions) and spine synapses (adrenergic junctions) with the ganglion cells; 3. clusters of noradrenergic chromaffin cells. Cells and fibers are distributed within wide interstices containing fibrocytes, collagen fibers, blood vessels, and mast cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00703906
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  • 6
    Electronic Resource
    Electronic Resource
    Dense-core microtubules in neurons and gliocytes of the toad Bufo arenarum HenselThis study was supported by RG 58028 School grant from the Rockefeller Foundation. (1968)
    New York, NY [u.a.] : Wiley-Blackwell
    American Journal of Anatomy 122 (1968), S. 157-167 
    Details
    ISSN: 0002-9106
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine
    Notes: Numerous microtubules of nerve cells and gliocytes in the toad are found, in electron micrographs, to contain a dense core. Such content is granular in nature, the granules being irregularly disposed in the lumen of the microtubules. Comparative observations on dense-core microtubules in peripheral and central nerve cells indicate that they are consistent cell components in the entire nervous system of the toad. The functional significance of the granular content of the microtubles is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aja.1001220110
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    Paper (German National Licenses)
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