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  • Electronic Resource  (5)
  • Atrial natriuretic peptide  (2)
  • Chemistry  (2)
  • 3H-thymidine autoradiography  (1)
Material
  • Electronic Resource  (5)
Years
Keywords
  • 1
    ISSN: 0167-0115
    Keywords: Adrenocorticotropic hormone ; Angiotensin II ; Arginine vasopressin ; Atrial natriuretic peptide ; Corticosterone ; Corticotropin-releasing factor
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 0167-0115
    Keywords: Atrial natriuretic peptide ; Blood pressure ; Osmotic stimulation ; Oxytocin
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Cell & tissue research 172 (1976), S. 171-184 
    ISSN: 1432-0878
    Keywords: Gastric gland (Golden hamster) ; Cellular migration ; 3H-thymidine autoradiography
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary Ten hamsters received repeated injections of 3H-thymidine for 4 days and were allowed to survive for 7, 28, 42 and 100 days. Changes in spatial distribution of the labelled cells and in labelling indices of each cell line in the gastric glands were studied at various days after 3H-thymidine injections, and the fate of the mucous neck cell, the replacement of the chief cell and the mode of cell migration were discussed. After 4 days of repeated injections of 3H-thymidine, the labelled parietal cells and the mucous neck cells were concentrated at the neck area. Starting from the neck area, they migrated an average of 3 micra downwards per day. By 42 days, they reached the middle level of the glands, where the labelled mucous neck cells decreased but the labelled chief cells increased in number. The differentiation of the chief cell then appears to take place at the middle level of the glands through transformation of the migratory mucous neck cells. After 4 days of the labelling, about 1.8% of the chief cells located in the lower part of the glands was found to undergo in situ replication. This indicates that the renewal of this cell type is partly assured by its own mitotic activity. The foveolar cell — the future surface epithelium — seems to migrate upwards along the long axis of the glandular tubule in the pipe line system, which means “first produced, first migrates”. After migrating out from the neck area, the parietal cell and the mucous neck cell (the future chief cell) take an average of 200 days to reach the lower end of the glands. In the process of migration, however, the cells produced contemporaneously at the neck area became scatteringly spread from the neck towards the bottom of the gland. The time required for the newly-formed cells to reach the lower end of the gland varied between 100 and 300 days. In the gastric glands the cells first produced at the neck area do not first reach the lower end of the glands. This mode of random migration is referred to as the “stochastic flow system”. As one of the probable factors which disturb the pipe line flow of downward cell migration, cellular movements perpendicular to the long axis of the glandular tubule were suggested to occur at random at an any level of the gastric glands.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Stamford, Conn. [u.a.] : Wiley-Blackwell
    Polymer Engineering and Science 12 (1972), S. 199-203 
    ISSN: 0032-3888
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: It has been recognized recently that suspension polyvinyl chloride granules consist of particles ca 1μ in diam which are linked together to form a three-dimensional, sponge-like lattice. This paper deals with the fusion process of this particulate structure of PVC resin during powder extrusion. Extrudates prepared under various extrusion conditions are investigated through the electron microscope using a methyl methacrylate (MMA) embedding method followed by ultrathin sectioning. The MMA embedding method has been proven to be an effective means of revealing the detailed structure of molded PVC. Results showed that the 1μ-particles were subjected to breakdown due to heat and shear into fibrils 100-300 Å in thickness, which were the final structure attainable by extrusion. Discussion was focused on the fibrillar structure especially in relation to the elasticity in plasticized PVC.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Chichester [u.a.] : Wiley-Blackwell
    Journal of Raman Spectroscopy 18 (1987), S. 153-155 
    ISSN: 0377-0486
    Keywords: Chemistry ; Analytical Chemistry and Spectroscopy
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: The Raman optical activity (ROA) spectra of some azo dyes binding to cyclodextrins have been measured. This appears to be the first successful attempt to measure the ROA induced in achiral molecules by intermolecular interaction with chiral molecules. There was no relationship between the ROA signals and the Raman shifts accompanying inclusion phenomenon. From comparison of the ROA spectra of methyl orange with α-cyclodextrin and congo red with γ-cyclodextrin, it seems that the ROA spectra reflect the difference in the positions of the SO3- groups in the guest molecules.
    Additional Material: 7 Ill.
    Type of Medium: Electronic Resource
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