ALBERT

All Library Books, journals and Electronic Records Telegrafenberg

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
Filter
  • Cell & Developmental Biology  (6)
  • 1985-1989  (4)
  • 1975-1979  (1)
  • 1970-1974  (1)
  • 1935-1939
  • 1890-1899
  • 1
    Electronic Resource
    Electronic Resource
    Surface specializations of planarian gastrodermal cells as revealed by staining with ruthenium red (1986)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 188 (1986), S. 69-78 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Regional differences of the surface of planarian gastrodermal cells are emphasized by staining with ruthenium red (RR). It is proposed that such differences reflect functional diversity of the luminal, lateral, and basal surfaces of the cells. The luminal surface is coated with a uniform layer of the RR-positive substance, which penetrates into the intercellular space at the intermediate junction. The septate junction situated just beneath the intermediate junction shows a permeability barrier to the RR tracer. At the basolateral surface, however, RR stains the septate junction in which the electron density of individual septa is enhanced remarkably. The gastrodermal cells are delineated entirely with RR-positive substance passing freely through the gap junction fuses into the outer leaflets of adjacent plasma membranes. The irregularly dilated intercellular space at nonjunctional appositions includes a slight deposit of RR-positive substance which attaches to the plasma membrane. The basal surface is underlined by the continuous basal lamina, which consists of the lamina lucida and the lamina densa. The lamina densa has a conspicuous affinity for RR. The lamina lucida is characterized by irregular deposits of RR-positive substance, some of which concentrates on the hemidesmosomal portions. Treatment with the enzyme hyaluronidase prior to staining with RR abolishes the staining of the basal lamina. As a result, the material of the lamina densa appears flocculent.
    Additional Material: 18 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051880107
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Formation of the septate junction in regenerating planarian gastrodermis (1987)
    New York, NY : Wiley-Blackwell
    Journal of Morphology 192 (1987), S. 205-215 
    Details
    ISSN: 0362-2525
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Septate junctions develop initially just basad from apical junctional complexes at the apical ends of regenerating gastrodermal cells. The first morphological indication of differentiation of the junction is the appearance of gentle undulations of the plasma membranes of apposing cells. Subsequently dense dots develop at fairly regular intervals at the cytoplasmic surface of one cell, while SER cisternae become localized opposite them near the surface of the apposing cell. The dense dots are associated with bulges which narrow the intercellular space. Later the dense dots are replaced by filaments aligned along the inner leaflet of the parent cell. Strands of amorphous deposits form connections between SER cisternae and the sister membrane on the opposite side of the junction. Ruthenium red staining provides information on precursors which occupy the intercellular space between the apposed plasma membranes. As development of the junction progresses, ruthenium red stains only the newly formed septa but not the interseptal matrix. Regular arrangement of individual septa seems to be completed under the control of V-projections from both of their surfaces. Precursors for the structural material of the septa may be a secretory product derived from the SER. Dense dots and their derived filaments probably serve as reinforcing material for strengthening the cell membrane of the junction.
    Additional Material: 12 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jmor.1051920303
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Possible role of prostaglandins as negative regulators in growth stimulation by tumor necrosis factor and epidermal growth factor in human fibroblasts (1989)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 141 (1989), S. 275-280 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: Recombinant tumor necrosis factor (TNF), epidermal growth factor (EGF), and transforming growth factor β (TGF-β) stimulated growth of confluent human diploid fibroblasts (FS-4 cells) in the presence of fetal calf serum. TGF-β synergistically enhanced both the TNF- and EGF-stimulated cell growth, whereas synergism between the mitogenic action of EGF and that of TNF was not observed. When indomethacin or acetylsalicylic acid, an inhibitor of prostaglandin production, was added to FS-4 cells, cell growth stimulated by EGF or TNF was increased, suggesting that prostaglandins induced by these mitogens antagonize their growth stimulatory actions. In contrast, neither indomethacin nor acetylsalicylic acid had a significant effect on the TGF-β-induced growth of FS-4 cells. Mitogenic responses of indomethacin-treated cells to EGF, TNF, and TGF-β were similarly suppressed by the addition of exogenous prostaglandin D2 (PGD2). Other prostaglandins such as PGE2 and PGF2α produced less inhibition of the cell growth.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1041410207
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    The accumulation of manganese from the environmental medium by the egg of Oryzias latipes (1979)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 98 (1979), S. 241-243 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: The manganese content of the egg and embryo of the Medaka, Oryzias latipes was determined by activation analysis. A remarkable increase in the amount of manganese in the egg was observed within one hour after fertilization. The rate of increase was reduced by the gastrula stage and the concentration of manganese remained unchanged at a later stage. The accumulation of manganese by the Oryzias egg was discussed in relation to the effect of manganese on respiratory enzyme systems.
    Additional Material: 1 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1040980126
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Activation of collagen synthesis in primary culture of rat liver parenchymal cells (hepatocytes) (1985)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 122 (1985), S. 333-342 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: An increase in collagen synthesis by hepatic parenchymal cells (hepatocytes) was observed during 8 days in primary culture by the quantification of total [3H]hydroxyproline as a marker of total collagen synthesis and the ratio of [3H]hydroxyproline in the high-molecular-weight fraction to total [3H]hydroxyproline as a marker of collagen degradation after incubation of the cells with [3H]proline for 24 h. Type analysis of the collagen produced by the cells after 8 days in culture showed the presence of type I and type III collagens in addition to the components corresponding to type IV and type V (αA and βB) collagens. Only the latter two types were found in the collagens produced by the cells after 2 days in primary culture. (a) The purity of the hepatocytes inoculated was 97%, and the majority of the contaminating small cells were erythrocytes. (b) The rate of serum albumin synthesis, which is a typical function of the hepatocytes, was constant or increased during the culture period. (c) Immuno-electron microscopic observation indicated the production of type I collagen by the hepatocytes after 8 days in primary culture. These results are explained only by the activation of collagen synthesis in the day-8 hepatocytes in primary culture.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1041220302
    Location Call Number Expected Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Evidence for similar biochemical requirements for bioluminescence among the coelenterates (1973)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Cellular Physiology 81 (1973), S. 291-297 
    Details
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: We present evidence that the chemical requirements among all the bioluminescent coelenterates that have been examined are very similar or identical to those already described for Renilla by Cormier and associates. Components required for luminescence in Renilla were also found in a number of bioluminescent coelenterates examined such as Aequorea, Obelia, Cavernularia, Ptilosarcus, Stylatula, Acanthoptilum, Parazoanthus and Mnemiopsis. Depending on the organism these include one or more of the following: luciferyl sulfate, luciferase, and luciferin sulfokinase. These isolated components were found to be indistinguishable from those found in Renilla as evidenced by their reactivity in the Renilla bioluminescent system, by the spectral characteristics of the isolated luciferyl sulfates, by the molecular weights of the luciferases, and by the colors of the bioluminescence produced in vitro.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jcp.1040810218
    Location Call Number Expected 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...