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  • 1
    Electronic Resource
    Electronic Resource
    Surface-film microbial populations: diel amino acid metabolism, carbon utilization, and growth rates (1986)
    Springer
    Marine biology 92 (1986), S. 289-297 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Microheterotrophic dissolved free amino acid (DFAA) utilization, and microbial community and bacterial community carbon production and growth were studied using 3H-labeled organics as tracers in marine surface-film and subsurface (10 cm) waters off Baja California in November 1983. DFAA utilization was generally more rapid during the day (0.14 to 0.38 nM h-1) than at night (0.04 to 0.14 nM h-1) in surface-film and subsurface waters, but the percent of utilized amino acid which was respired was always greater during the night (22 to 57%) compared to the day (14 to 18%). Utilization of DFAA-carbon was estimated to range from 0.3 to 5.3 μg C l-1 d-1 for all stations studied. In six of the 8 samples examined, the percentage of microbial carbon accounted for by the bacterial component of the population (1.4 to 5.9%) was strikingly similar to the percentage of microbial carbon production accounted for by bacterial carbon production (1.9 to 5.1%). In all of these six samples, total microbial specific-growth rates and bacterial specific-growth rates were approximately equivalent (0.9 to 2.2 d-1 for the microbial community; 0.7 to 1.9 d-1 for bacteria). The two exceptions were samples apparently influenced by transient flagellate populations migrating into the surface or subsurface waters at night. These observations support the conclusion that surface films contain unique and highly active microbial populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00392847
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  • 2
    Electronic Resource
    Electronic Resource
    Brassica taxonomy based on nuclear restriction fragment length polymorphisms (RFLPs) (1988)
    Springer
    Theoretical and applied genetics 76 (1988), S. 593-600 
    Details
    ISSN: 1432-2242
    Keywords: Brassica rapa ; Brassica oleracea ; Molecular taxonomy ; Phylogenetic tree ; Restriction fragment length polymorphism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Preliminary analysis using nuclear RFLPs provided evidence that subspecies within Brassica rapa originated from two different centers. One center is in Europe, represented by turnip and turnip rape from which the oilseed sarson was derived. A second center is in South China containing a variety of Chinese vegetables of which pak choi and narinosa seem to be the most ancient forms. Based on RFLP data, the accessions of B. oleracea examined could be divided into three distinct groups, represented by thousand head kale, broccoli and cabbage. Thousand head kale and Chinese kale appear to be the primitive types. Observations of parallel variation among subspecies of both species are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00260914
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  • 3
    Electronic Resource
    Electronic Resource
    A method for the rapid production of fine plant cell suspension cultures (1988)
    Springer
    Plant cell reports 7 (1988), S. 459-462 
    Details
    ISSN: 1432-203X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract A method has been devised which allows the rapid production of fine suspension cultures of small aggregate size from suspension cultures of large average aggregate size, such as those of Capsicum frutescens. The method, which uses a Waring blender for aseptic homogenisation of cultures, has also been shown to be effective in rapidly producing suspension cultures from callus cultures. The suspension cultures so produced are particularly useful for immobilisation, such as in porous polyurethane foam matrices.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00269538
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  • 4
    Electronic Resource
    Electronic Resource
    Analytical solutions for the rotating polytrope (1988)
    Springer
    Astrophysics and space science 143 (1988), S. 349-358 
    Details
    ISSN: 1572-946X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Analytical solutions are constructed for the polytropen=1. An algorithm is devised to determine the numerical values of coefficients. These are compared with existing values determined from purely numerical schemes. The usefulness of the approach is discussed together with numerical strategies for this type of problem.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00637146
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  • 5
    Electronic Resource
    Electronic Resource
    Petrology and deformation of metamorphosed volcanic-exhalative sediments in the Gairloch Schist Belt, N.W. Scotland (1985)
    Springer
    Mineralium deposita 20 (1985), S. 302-308 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The Gairloch Schist Belt in the Archaean to Early Proterozoic Lewisian Complex of north-west Scotland is largely composed of amphibolite facies metabasites and metagreywackes. These are associated with a distinctive suite of metamorphosed volcanic-exhalative sediments including quartz-magnetite rocks, garnet-grunerite rocks and compositionally variable, siliceous calcite- and dolomite-bearing lithologies. The carbonate horizons are locally rich in sulphide and carry Cu-Zn-Au mineralization. Meta-exhalites occur within parts of metavolcanic units characterized by metamorphosed tuffs and tuffs mixed with exhalative material. Quartz-magnetite and carbonate horizons were dismembered and underwent mylonitic recrystallization during regional compression. The associated metabasic rocks in the shear zones have suffered extensive phyllonitization. This style and degree of deformation are not developed elsewhere in the immediate area which suggests that ductile shear zones in the Gairloch Schist Belt were preferentially initiated near and localized around the meta-exhalative horizons.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00204290
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  • 6
    Electronic Resource
    Electronic Resource
    Epigenetic tourmalinite and arsenopyrite in the aureole of the Leinster batholith, SE Ireland (1988)
    Springer
    Mineralium deposita 23 (1988), S. 247-255 
    Details
    ISSN: 1432-1866
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract Metasomatic tourmaline-quartz-hydromuscovite/phengite-fluorite rocks which locally contain in excess of 40% disseminated arsenopyrite and lesser amounts of pyrrhotite, chalcopyrite, pyrite, molybdenite, rutile, ilmenite and Fe-rich chlorite, occur near the village of Inistioge in SE Ireland. They are developed within Lower Palaeozoic phyllites close to the northwest margin of the southern termination of the Leinster batholith. The mineralization occurs within a belt of anomalously high (Caledonian) strain which was active during batholith-intrusion and which is essentially a product of heterogeneous shortening. Tourmaline constitutes up to 60% of the volume of the metasomatic material and although the lithology exhibits bed-parallel lamination, both detailed field and textural relationships demonstrate its origin to be epigenetic. The mineralization is spatially related to pegmatitic (K-feldspar, fluorite and muscovite-bearing) quartz veins with greisen alteration envelopes composed of coarse-grained muscovite, fluorite, apatite and tourmaline. The mineralized rocks were produced during alteration of aluminous metasediments by magmatic and/or meteoric fluids which were channelled through the high strain zone during cooling of the batholith.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00206403
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  • 7
    Electronic Resource
    Electronic Resource
    Investigations into nitrogen sources and supply in reclaimed colliery spoil (1986)
    Springer
    Plant and soil 91 (1986), S. 181-194 
    Details
    ISSN: 1573-5036
    Keywords: Colliery spoil ; Grass cultivar ; Legumes ; Nitrogen sources ; Nitrogen supply ; Phosphate level pH ; Reclamation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Two trials were established to investigate the supply of nitrogen from ammonium and nitrate fertilizers, slow release nitrogen fertilizers, an organic nitrogen fertilizer and a legume, at two phosphate levels, to eight grass cultivars on colliery spoil. Spoil nitrogen supply and chemical characteristics and herbage dry matter and nitrogen yields were monitored for up to seven years. pH and conductivity fell at both sites. pH trends appeared to be independent of nitrogen treatment. Nitrogen in the ammonium form gave better yields than in the nitrate form when 125 kg N ha−1 was supplied in a season but there was no difference when 62.5 kg N ha−1 was applied. Slow release forms of nitrogen gave better yields more evenly distributed over the season than one application of ammonium sulphate per season. Once established white clover (Trifolium repens) plots had a more consistent nitrogen supply, more evenly distributed yield and better quality herbage than nitrogen fertilizer plots.Lolium perenne yielded poorly at low fertility.Festuca rubra andAgrostis castellana, although establishing slowly, yielded well under high and low fertility.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181786
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  • 8
    Electronic Resource
    Electronic Resource
    Dissociation of insulin binding from insulin stimulation of 2-deoxyglucose transport by ruthenium red (1986)
    Springer
    Bioscience reports 6 (1986), S. 317-322 
    Details
    ISSN: 1573-4935
    Keywords: Insulin binding ; insulin action ; glucose transport ; calcium ; ruthenium red
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract Ruthenium red increased specific insulin binding to isolated adipocytes 5.4 fold and 2.6 fold over binding determined in the absence and presence of Ca2+ and Mg2+. The increase in insulin binding was not accompanied by an increase in insulin sensitivity. The lack of effect of ruthenium red on insulin action argued strongly against an increase in intracellular Ca2+ as a potential messenger/transducer of insulin action and suggested that the enhancing effect of Ca2+ on insulin action was a result of increased receptor affinity.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01115161
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  • 9
    Electronic Resource
    Electronic Resource
    On the extensional viscosity of mobile polymer solutions (1987)
    Springer
    Rheologica acta 26 (1987), S. 20-30 
    Details
    ISSN: 1435-1528
    Keywords: Extensional viscosity ; polymer solution ; Spin Line Rheometer ; Converging Flow Rheometer ; Trouton ratio
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract We describe experimental results on the extensional viscosity of mobile polymer solutions obtained from two instruments, the first being a commercial Spin Line Rheometer and the second a custom-built lubricated-die Converging Flow Rheometer. The interpretation of data in terms of Trouton ratios is facilitated by a simple analysis for the Generalized Newtonian Fluid model. Agreement between data from the two rheometers is satisfactory and we show that polymer solutions can be either tension stiffening or tension thinning. However, the Trouton ratios in both cases are greater than the Newtonian values and we anticipate that this will always be the case for polymer solutions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01332680
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  • 10
    Electronic Resource
    Electronic Resource
    Direct measurement of static yield properties of cohesive suspensions (1987)
    Springer
    Rheologica acta 26 (1987), S. 437-446 
    Details
    ISSN: 1435-1528
    Keywords: Yields tress ; applied stress rheometer ; pulseshearometer ; cohesivesuspension ; illite
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Physics
    Notes: Abstract A technique of yield stress investigation based upon the combined use of two devices (an applied stress rheometer and an instrument for measuring the propagation velocity of small amplitude, torsional shear waves) is described. Investigations into the low shear rate rheological properties of illitic suspensions are reported for shear rates, typically, in the range 10−4— 10−1 s−1 under applied stresses in the range 0.01 — 10 Nm−2 and involving shear strains between 10−1 and 10−4. Results are presented which demonstrate that the technique does not invoke the excessive structural disruption of material associated with applied shear rate based methods (direct and otherwise) and the widely encountered problem of wall slip at the surface of rotational measuring devices is avoided using miniature vane geometries. Results are compared with those obtained using smooth-walled cyclindrical measuring devices in both applied stress and applied shear rate instruments. Yield measurements are considered in relation to the structural properties of the undisturbed material state and shear moduli obtained by studying the propagation of small amplitude (10−5 rad), high frequency (~ 300 Hz) torsional shear waves through the test materials are reported. Experimental techniques and instrument modifications to permit these measurements are described.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01333844
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