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  • Kumaun Himalaya  (3)
  • Polymer and Materials Science  (3)
  • 1
    Electronic Resource
    Electronic Resource
    Phenological characteristics of the tree layer of Kumaun Himalayan forests (1985)
    Springer
    Plant ecology 60 (1985), S. 91-101 
    Details
    ISSN: 1573-5052
    Keywords: Flowering ; Forest ; Fruiting ; Kumaun Himalaya ; Leafdrop ; Leaf flushing ; Phenology ; Phenological activity level ; Treelayer phenology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The phenology of tree components of natural forests occurring between 350 and 2150 m in Kumaun Himalaya is descibed. All forests had more evergreen than deciduous taxa. The degree of evergreenness increased with increasing elevation and decreasing summer dryness. For most species (including all dominants) concentrated leafdrop and simultaneous leafing occurred during the warm-dry period of the year. About half of the species showed multiple leafing. All species had a sharp flowering peak in April. Wet-season flowering was rare. Most of the species flowered synchronously. In the sal- (Shorea robusta) and pine (Pinus roxburghii) forests a single peak of fruit maturation occurred in summer, while in other forests there also was a secondary peak in autumn.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00040351
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Epiphytic succession on tree trunks in a mixed oak-cedar forest, Kumaun Himalaya (1985)
    Springer
    Plant ecology 63 (1985), S. 105-112 
    Details
    ISSN: 1573-5052
    Keywords: Bryophyte ; Diversity ; Epiphytic succession ; Evolutionary strategy ; Kumaun Himalaya
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The epiphytes present at about breast height on trunks of different size were studied for three major tree species in a seasonally wet forest at 2050 m altitude in the Kumaun Himalaya: Cedrus deodora, Quercus floribunda and Q. leucotrichophora. The total biomass and species number per unit trunk area, were found to increase with trunk size. It was supposed that the results indicated a succession in the type of epiphytic cover from young trunks to older trunks. The amount of loose material (plant remains and ‘soil’) per unit area of trunk increased with increasing girth. The C:N ratio in this material was initially very high on the oaks (129–197) and declined with increasing trunk size (to 73–78); the ratio was constant across girth classes in the cedar (86–87). Bryophytes produced most biomass on most trunks; next to them were lichens on the smallest trunks, and flowering plants on the largest. The number of species of epiphytes was similar on all three host species. The results are discussed in relation to contemporary ideas on diversity and ‘strategies’.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00044060
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Compositional and structural features of certain tree stands along an elevational gradient in Central Himalaya (1989)
    Springer
    Plant ecology 85 (1989), S. 117-120 
    Details
    ISSN: 1573-5052
    Keywords: Himalayan forest ; Kumaun Himalaya ; Ordination
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Forests of an elevational transect in the central Himalayan region were studied regarding their tree species composition and structural features. In spite of many differences in compositional and structural features in different forest stands, the arrangement of stands in the ordinations based separately on species composition and structural features exhibit many similarities. Disturbances such as landslides and forest fires play the most important role in the distributor of particular species.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00042261
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Liquid exclusion chromatography. A technique for monitoring the growth of polymer particles in emulsion polymerization (1978)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 22 (1978), S. 577-584 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    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: An experimental investigation of the growth of polymer particles in the emulsion polymerization of styrene and of vinyl acetate is reported. The growth of polymer particles in the size range of 200-6500 Å was monitored by liquid exclusion chromatography (LEC). This relatively new analytical technique permits very rapid analysis for particles as small as 200 Å and should prove extremely useful as an online monitor of polymer particle size for the control of latex reactors.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1978.070220225
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Effect of zinc diisopropyl dithiophosphate on the photooxidative degradation of poly(2,6-dimethyl-1,4-phenylene oxide) films (1983)
    Weinheim : Wiley-Blackwell
    Acta Polymerica 34 (1983), S. 216-218 
    Details
    ISSN: 0323-7648
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Physics
    Description / Table of Contents: Der Einfluß von Zink-diisopropyl-dithiophosphat (ZnDTP) auf den photostabilisierten Abbau von Filmen aus Poly(2,6-dimethyl-1,4-phenylen-oxid) wurde im Konzentrationsbereich 0,1 bis 1,0 Masse-% untersucht. Der Abbau des Polymers hängt deutlich von der Konzentration des ZnDTP ab, das bei allen Konzentrationen als Photostabilisator wirkte.
    Notes: The effect of zinc diisopropyl dithiophosphate (ZnDTP) chelate over the range of 0.1 to 1.0 wt.% on the photostabilized degradation of poly(2,6-dimethyl-1,4-phenylene oxide) (PPO) films was examined. The degradation of the polymer was remarkably affected by the concentration of the ZnDTP which acted as photostabilizer at all concentrations.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/actp.1983.010340407
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Form Function for Propellants in Closed Vessel Work (1980)
    Weinheim : Wiley-Blackwell
    Propellants, Explosives, Pyrotechnics 5 (1980), S. 9-14 
    Details
    ISSN: 0721-3115
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: A general theoretical cubic form function for use in closed vessel work during the evaluation of absolute ballistic parameters of propellants is introduced along with the expressions for the coefficients for a number of common propellant shapes. The conditions under which this form function is accurately applicable are also indicated. This form function is superior and gives much more accurate results than the quadratic form function which is in wide use at present. The differences of the cubic form function from the quadratic are also explained.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/prep.19800050103
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    Paper (German National Licenses)
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