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  • 1
    Electronic Resource
    Electronic Resource
    Photoregulation of the Composition, Function, and Structure of Thylakoid Membranes (1986)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Plant Physiology 37 (1986), S. 93-136 
    Details
    ISSN: 0066-4294
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.pp.37.060186.000521
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  • 2
    Electronic Resource
    Electronic Resource
    Isomorphisms of the disc algebra and inverse faber sets (1985)
    Springer
    Mathematische Zeitschrift 188 (1985), S. 545-558 
    Details
    ISSN: 1432-1823
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01161656
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  • 3
    Electronic Resource
    Electronic Resource
    Spatiotemporal effects of invertebrates on soil processes (1988)
    Springer
    Biology and fertility of soils 6 (1988), S. 216-227 
    Details
    ISSN: 1432-0789
    Keywords: Soil fauna ; Soil processes ; Spatiotemporal effects ; Feeding activities ; Hierarchy of levels
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The processes of C and N mineralization carried out by microorganisms are affected directly and indirectly by invertebrates over a wide range of spatial and temporal scales. Microfauna track temporal changes in bacterial and fungal populations in soil microsites, particularly in the rhizosphere, which alters the dynamic balance between N mobilization and immobilization. The feeding activities of mesofauna can determined the distribution, activities and composition of fungal communities. Macrofauna have major effects on fungal and bacterial activities, both directly, through feeding and gut passage, and indirectly, by affecting the microbial environment in litter and soil. Soil biological processes can therefore be considered a hierarchy of successive levels of organization where the macro-, meso- and microfauna influence microbial activities at different scales in the habitat mosaic. The spatial components of this hierarchy are integrated by plant roots; root morphology must therefore define the scales at which the system operates under different plant nutrient regimes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00260818
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  • 4
    Electronic Resource
    Electronic Resource
    On theorems of Jackson and Bernstein type in the complex plane (1988)
    Springer
    Constructive approximation 4 (1988), S. 307-319 
    Details
    ISSN: 1432-0940
    Keywords: 30E10 ; 41A10 ; 41A17 ; 30C10 ; Jackson's theorem ; Bernstein's theorem ; Bernstein's inequality ; Hölder continuity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: Abstract We consider best polynomial approximation to functions analytic in a Jordan domainD and continuous on $$\bar D$$ . We relate theorems of Jackson and Bernstein type to the Hölder continuity of the exterior conformal mapping functions forD.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02075464
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  • 5
    Electronic Resource
    Electronic Resource
    Variation in expression of trimorphic incompatibility in Pontederia cordata L. (Pontederiaceae) (1985)
    Springer
    Theoretical and applied genetics 70 (1985), S. 355-362 
    Details
    ISSN: 1432-2242
    Keywords: Trimorphic incompatibility ; Pontederia cordata L.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Pontederia cordata L. (Pontederiaceae), a perennial diploid, possesses the rare genetic polymorphism tristyly. A controlled pollination programme was conducted over a three year period, under glasshouse conditions, on 36 clones of P. cordata var. cordata to examine the nature of the self-incompatibility system. The three major findings of the pollination study were: (1) the three floral morphs display different levels of self-incompatibility, (2) pollen from the two anther levels within a flower exhibits different compatibility behaviour in self-pollinations, (3) considerable individual genetic variation in the expression of self-incompatibility is evident among clones within floral morphs. Similar results were also obtained from a smaller study on 15 clones of P. cordata var. lancifolia conducted over a 6 month period. In common with other Pontederia species the mid-styled morph (M) of P. cordata produces large amounts of seed when self-pollinated with pollen from long-level anthers. A developmental model is proposed to explain the high level of self-compatibility of the M morph in Pontederia species. Self-pollination of segregating progenies from M and S morphs of known incompatibility status demonstrated that the expression of incompatibility is closely associated with style length. It is suggested that overall differences in incompatibility behaviour among the floral morphs may be due to the pleiotropic effects of major genes controlling sub-characters of the tristylous syndrome, rather than linked modifier genes. However, the variable expression of trimorphic incompatibility within floral morphs suggests that this variation may be polygenic in origin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00273739
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  • 6
    Electronic Resource
    Electronic Resource
    The future use of refrigeration in British coal mines (1988)
    Springer
    Geotechnical and geological engineering 6 (1988), S. 41-61 
    Details
    ISSN: 1573-1529
    Keywords: Longwall mining ; heat sources ; refrigeration ; cooling strategy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Summary This paper examines the methods presently available to apply refrigeration to a longwall district of a coal mine with particular reference to both the sources of heat and humidity around a district, and the specific locations which require cooling. Other methods to improve climatic conditions are also investigated and computer-predicted results from a district temperature prediction program are used for discussion. An approach to the solution of a climatic problem is explained with reference to other coal mine contaminants and an environmental design philosophy for deep high production districts in British coal mines is described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00881026
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  • 7
    Electronic Resource
    Electronic Resource
    The effects of an enhanced inflammatory reaction on the surface properties of cast biomer (1986)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 20 (1986), S. 153-168 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: The ability of a biomaterial to withstand the rigors of the harsh biologic environment is an important consideration when considering a material for long-term biomedical applications. Using a cage implant system, the effects of an intense inflammatory reaction on cast Biomer have been investigated. The inflammatory response to cast Biomer was greatly increased by coimplanting Biomer films with a cytotoxic poly(vinyl chloride) (PVC) in rats for a period of 21 days. Cast Biomer films were characterized by weight, advancing contact angle with water in air, attenuated total reflectance infrared spectroscopy and scanning electron microscopy (SEM). The analyses were performed before any treatment, after autoclaving and sonication, and after 21 days implantation with the cytotoxic (PVC) in rats. The results of the study indicated that cast Biomer does not undergo significant chemical degradation when subjected to the effects of an intense inflammatory reaction for 21 days. Implantation does, however, lead to rearrangement that results in a more polar and hydrophilic surface, suggesting that the polymer adapts to the hydrophilic environment of the inflammatory exudate.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820200205
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  • 8
    Electronic Resource
    Electronic Resource
    In vitro stimulation of fibroblast activity by factors generated from human monocytes activated by biomedical polymers (1989)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 23 (1989), S. 911-930 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: Biomedical polymers used in constructing implantable artificial devices may affect host responses to the material and ultimately contribute to the success or failure of a device via mechanisms of cell-polymer interactions. Human peripheral blood monocytes (MO) cultured in the presence of several such biomedical polymers released factors that stimulated fibroblast proliferation and/or collagen synthesis. The factors that stimulated fibroblast proliferation were differentially released from monocytes cultured in the presence of Dacron, polyethylene, expanded polytetrafluoroethylene (ePTFE), polydimethylsiloxane, and polystyrene (control). Supernatants obtained from monocytes cultured in the presence of Biomer, a segmented polyetherurethane, were unable to stimulate fibroblast proliferation. However, supernatants from all cultures, including MO-Biomer cultures, were able to induce collagen production from the same target fibroblasts. These same supernatants also were shown to contain interleukin 1 (IL1) activity. Neutralization of the fibroblast stimulatory potential (FSP) activity with antibodies directed against human IL1 and human PDGF demonstrated that IL1 and not PDGF was responsible for the FSP activity. Results of this study show that by affecting macrophage activation, different biomedical polymers can affect host biocompatibility responses by altering fibroblast proliferation and function.
    Additional Material: 4 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820230808
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  • 9
    Electronic Resource
    Electronic Resource
    In vivo biocompatibility studies. VII. Inflammatory response to polyethylene and to a cytotoxic polyvinylchloride (1986)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 20 (1986), S. 37-50 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: The cellular biocompatibility of low-density polyethylene and a cytotoxic polyvinylchloride were investigated using an in vivo cage implant system. Components of the inflammatory response (white cells, extracellular alkaline and acid phosphatase, the complement component C3, and total protein content) were monitored over a 21-day implantation period. Scanning electron microscopy was used to evaluate the morphologic condition of leukocytes adherent to the implanted polymers. Prior to implantation, each polymer was evaluated using an established primary acute toxicity screen. The results showed that the cytotoxic polyvinylchloride stimulated an intense acute phase inflammatory response, and at later observation periods, an intense and increasing chronic inflammatory response. In constrast, the polyethylene promoted relatively small increases in the acute and chronic phases of inflammation; the overall cellular response being essentially resolved by the third week after implantation. The initial toxicity screen of each polymer suggested that the observed differences in inflammation were primarily caused by the release from the polyvinylchloride of the added cytotoxic agent (dioctyltinbisoctylmercaptoacetate).
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820200105
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  • 10
    Electronic Resource
    Electronic Resource
    Biodegradation of a polyurethane in vitro (1987)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 21 (1987), S. 231-246 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: This study examines the effect of in vitro exposure to enzymes on the performance properties of Biomer®, a segmented polyetherurethane used in a number of blood-contacting devices such as catheters, heart assist pumps, and chambers for artificial hearts. The ultrathin samples were treated with two proteolytic enzymes, papain and urease, for periods of 1-6 months at 37°C. The treated Biomer® samples were subjected to chemical and physical analysis. Effects of biodegradation by the enzymes were assessed by fatigue tests, gel permeation chromatography (GPC), and attenuated total reflectance-Fourier transform infrared (ATR-FTIR) analysis. Papain was found to be more effective in degrading the polymer than urease. Mechanisms for enzymic degradation are proposed.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820210207
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