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  • 1995-1999  (2)
  • Human tooth  (1)
  • release rate  (1)
  • Multinucleation
  • 1
    Electronic Resource
    Electronic Resource
    Formation of an alternate lamellar pattern in the advanced cellular cementogenesis in human teeth (1997)
    Springer
    Anatomy and embryology 196 (1997), S. 115-121 
    Details
    ISSN: 1432-0568
    Keywords: Key words Cellular cementum ; Intrinsic fiber ; Cementoblast ; Human tooth
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract  The formation of an alternate lamellar pattern in the advanced stage of cellular cementogenesis in human molars was examined by light and electron microscopy. In longitudinal ultrathin sections, longitudinally oriented intrinsic fibril bundles appeared in close and parallel association with slender processes of cementoblasts on the cementum. Where transversely oriented intrinsic fibril bundles appeared, cementoblasts formed indentations to enclose the fibril bundles. Cytoplasmic fragments were also enclosed in the indentations. Scanning electron microscopy indicated that cementoblasts have developed two types of processes on their cementum-facing side – ridge- and finger-like. The cementoblasts formed groove-like compartments by ridge-like processes in cooperation with other cementoblasts. The compartments formed groups, and in each group the compartments were arranged in the same direction. The finger-like processes were arranged in parallel with the ridge-like processes in the compartments. These observations suggest that: (1) slender processes and cytoplasmic fragments are longitudinally and transversely cut finger-like processes, respectively; (2) the cellular indentations are transversely cut groove-like compartments; (3) the cementoblasts regulate the intrinsic fiber arrangement by the two types of processes; (4) the cementoblasts move the two types of processes synchronously and periodically to cause an alternate change in the intrinsic fiber arrangement. This dynamic sequence results in the alternate lamellar pattern of cellular cementum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004290050084
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Nitrogen release from polyolefin-coated urea with attention to individual weights (1996)
    Springer
    Nutrient cycling in agroecosystems 46 (1996), S. 153-156 
    Details
    ISSN: 1573-0867
    Keywords: coating thickness ; controlled release ; granule weight ; polyolefin-coated urea ; release rate ; slow release
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Nitrogen release from individual granules of polyolefin-coated urea (POCU) was studied in order to evaluate a variation in N release. Individual granules were immersed in 10 ml water at 25°C for 7 and 20 d. Individual granules of POCU had different weights and N release rates. An increase in the individual weights of POCU led to a decrease in the N release for both incubation periods. This relationship between the N release and individual weights may be related to the coating thickness.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00704314
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
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