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  • Rat  (4)
  • 3-Cl-N-vinylcarbazole  (1)
  • Albumin  (1)
  • Chaco vegetation  (1)
  • 1
    Electronic Resource
    Electronic Resource
    Downregulation of hepatic albumin mRNA in response to induced hypercholesterolemia in rabbits
    Amsterdam : Elsevier
    Biochimica et Biophysica Acta (BBA)/Lipids and Lipid Metabolism 1128 (1992), S. 77-82 
    Details
    ISSN: 0005-2760
    Keywords: (Rabbit liver) ; Albumin ; Hypercholesterolemia ; mRNA
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Medicine , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0005-2760(92)90260-3
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    The influence of age on supraoptic nucleus neurons of the rat: Morphometric and morphologic changes
    Amsterdam : Elsevier
    Mechanisms of Ageing and Development 62 (1992), S. 223-228 
    Details
    ISSN: 0047-6374
    Keywords: Aging ; Membranous bodies ; Rat ; Supraoptic neucleus
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0047-6374(92)90108-P
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Isograft and xenograft of the subcommissural organ into the lateral ventricle of the rat and the formation of Reissner’s fiber (1999)
    Springer
    Cell & tissue research 296 (1999), S. 457-469 
    Details
    ISSN: 1432-0878
    Keywords: Key words Subcommissural organ ; Isograft ; Xenograft ; Reissner’s fiber ; Cerebrospinal fluid ; Rat ; Bovine
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract  The subcommissural organ (SCO) secretes glycoproteins into the cerebrospinal fluid (CSF) that aggregate and form Reissner’s fiber (RF). The factors involved in this aggregation are not known. One factor may be the hydrodynamics of the CSF when flowing through the aqueduct. This hypothesis was tested by isografting rat SCO and xenografting bovine SCO into the lateral ventricle of rats. Xenografts were either fresh bovine SCO or explants cultured for 30 days before transplantation. The grafts were investigated by electron microscopy and immunocytochemistry using antibodies against RF glycoproteins, serotonin and the glucose transporter I. Maximal time of transplantation was 43 days for isografts and 14 days for xenografts. The isografts were not reinnervated but were revascularized; they secreted into the ventricle RF glycoproteins that became progressively packed into pre-RF and RF structures identical to those formed by the SCO in situ. RF was confined to the host ventricle and at its distal end the constituent proteins disassembled. Xenografts were neither reinnervated nor revascularized and secreted into the host ventricle a material that never formed an RF. These findings indicate that the CSF factor responsible for the formation of RF is species specific, and that this process does not depend on the hydrodynamics of the CSF. The blood vessels revascularizing the isografted SCO acquired the characteristics of the vessels irrigating the SCO in situ, namely, a tight endothelium displaying glucose transporter I, and a perivascular space containing long-spacing collagen, thus indicating that basal release of glycoproteins may also occur in the grafted SCO.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004410051306
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Cellular organization of the lateral and postinfundibular regions of the median eminence in the rat (1979)
    Springer
    Cell & tissue research 201 (1979), S. 377-408 
    Details
    ISSN: 1432-0878
    Keywords: Median eminence ; Tanycytes ; Nerve tracts ; Regional organization ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary The structural organization of the rostral, lateral and postinfundibular regions of the median eminence (ME) of 5-day cyclic diestrous rats was studied with light and electron microscopic methods. The ependymal cells lining (i) the floor of the infundibular recess (IR) at rostral levels, (ii) the lateral extensions of the IR, and (iii) the floor of the premammillary recess appear to represent the same type of tanycyte ependyma (β1 tanycytes). In the entire width of the rostral and postinfundibular palisade regions, as well as in the lateral palisade region of the preinfundibular ME, the processes of the β1 tanycytes form a continuous cuff. This cuff separates the nerve endings from the blood vessels and the pars tuberalis. At this level, synaptoid contacts between neurosecretory axons and the ependymal cuff can be observed. The ultrastructural characteristics of the β1 tanycytes are described and their ependymal endings tentatively classified into three types. In the lateral regions of the ME, the Golgi study revealed the presence of two fiber systems: (i) one possessing a latero-medial trajectory and distributed in the subependymal region; (ii) the other formed by a loose longitudinal tract originating from neurons of the arcuate nucleus. Some functional implications of the cellular organization of the rat ME are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00236998
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  • 5
    Electronic Resource
    Electronic Resource
    Effects of tunicamycin on the hypothalamo-neurohypophysial system of the rat (1981)
    Springer
    Cell & tissue research 217 (1981), S. 199-210 
    Details
    ISSN: 1432-0878
    Keywords: Hypothalamus ; Neurohypophysis ; Neurophysin ; Secretion ; Rat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Intracisternal injections of tunicamycin, an inhibitor of glycosylation, decreased the incorporation of [35S]cysteine into the neurophysins in the rat neurohypophysis. Histochemical and immunocytochemical studies showed that there was no concomitant decrease in the amount of secretory product in the perikarya of the hypothalamo-neurohypophysial neurones. Indeed there was an increase, although this was not associated with neurosecretory granules as judged electron-microscopically. Tunicamycin led to the formation of socalled “colloid droplets” which were immunopositive and of which the ultrastructural correlates appeared to be product-filled dilatations of the rough endoplasmic reticulum. The observations are interpreted to suggest that glycosylation plays a rôle in the packaging of secretory material in the hypothalamo-neurohypophysial system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00233838
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Vegetation changes along a precipitation gradient in Central Argentina (1993)
    Springer
    Plant ecology 109 (1993), S. 5-14 
    Details
    ISSN: 1573-5052
    Keywords: Chaco vegetation ; Humidity gradient ; Monte vegetation ; Physiognomic plant characters ; Vegetation structure
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Changes in vegetation along a precipitation gradient in Central Argentina were studied. Floristic samples were taken along an east-west transect of about 300 km. Correlation analysis between precipitation and ordination axes was used to provide an environmental interpretation of vegetation variability. Floristic analysis produced an ordination of plant communities from evergreen forests (precipitation 〉500 mm) to desert shrublands and therophyte communities (precipitation 〈200 mm). Results showed a trend of floristic and structural impoverishment towards the west. There is a replacement of species along the transect and a shift in dominant growth forms. The first ordination axis is significantly, negatively correlated with annual precipitation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00149541
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Halogenated poly-(N-vinylcarbazoles): flexibility and viscometric constants (1991)
    Springer
    Colloid & polymer science 269 (1991), S. 320-323 
    Details
    ISSN: 1435-1536
    Keywords: 3-Cl-N-vinylcarbazole ; 3-Br-N-vinylcarbazole ; monomericunitprojectionlength ; viscometricconstants
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract N-vinylcarbazole, 3-Cl-N-vinylcarbazole, and 3-Br-N-vinylcarbazole were homopolymerized via radical polymerization. Several monodispersed samples of respective polymers were obtained by fractionation and their intrinsic viscosities were measured in tetrahydrofurane at 25°C. The viscometric constantsK anda, the monomeric unit projection length ℏ, and the flexibility parameter λ were determined using the gel permeation chromatography technique to determine the elution volumeVe and apply a newly derived relationship between the flexibility parameter and molecular weight. The presence of halogen atoms in the carbazole group of PNVC varies the value of ℏ and, consequently, the rigidity of the polymer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00654578
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    Paper (German National Licenses)
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