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  • 1
    Electronic Resource
    Electronic Resource
    Corrections - Determination of the Rate-Limiting Segment of Aminoglycoside Nucleotidyltransferase 2''-I by pH- and Viscosity-Dependent Kinetics (1989)
    s.l. : American Chemical Society
    Biochemistry 28 (1989), S. 1930-1930 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00430a603
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  • 2
    Electronic Resource
    Electronic Resource
    Nutritional and Hormonal Regulation of the Activity State of Hepatic Branched-Chain α-Keto Acid Dehydrogenase Complex (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 573 (1989), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1989.tb15007.x
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  • 3
    Electronic Resource
    Electronic Resource
    q measurements during sawtooth oscillations in a low q tokamak (1989)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 1 (1989), S. 2139-2141 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The central safety factor during a sawtooth oscillation in material limiter tokamak discharges (scrapeoff plates inserted to the separatrix) in the TOKAPOLE II poloidal divertor tokamak [Phys. Rev. Lett. 49, 734 (1982)] is measured to be significantly less than 1 (approximately 0.7) during a sawtooth oscillation. This result is identical to that observed earlier in the same device in magnetic limiter discharges. Thus the presence of scrapeoff plasma beyond the divertor separatrix is not responsible for the absence of total reconnection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.859078
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  • 4
    Electronic Resource
    Electronic Resource
    Jack bean urease (EC 3.5.1.5) VIII. On the inhibition of urease by amides and esters of phosphoric acid (1986)
    s.l. : American Chemical Society
    Journal of the American Chemical Society 108 (1986), S. 7124-7125 
    Details
    ISSN: 1520-5126
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ja00282a059
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  • 5
    Electronic Resource
    Electronic Resource
    Growth factors: From the laboratory to the clinic (1986)
    [s.l.] : Nature Publishing Group
    Nature 321 (1986), S. 198-198 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] HORMONE therapy is used for a wide range of disorders and the results of treatment are often dramatic. The work primarily involves the classical 'glandular' hormones that are released as circulating messenger systems because fairly large amounts of material are readily available and their target ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/321198a0
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  • 6
    Electronic Resource
    Electronic Resource
    Thermal metamorphism and H2O-CO2-NaCl immiscibility at Patapedia, Quebec: evidence from fluid inclusions (1989)
    Springer
    Contributions to mineralogy and petrology 102 (1989), S. 247-254 
    Details
    ISSN: 1432-0967
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences
    Notes: Abstract The methamorphic history of the Patapedia thermal zone, Gaspé, Quebec, is re-evaluated in the light of results obtained from a study of fluid inclusions contained in quartz phenocrysts of felsic dyke rocks. The thermal zone is characterised by calc-silicate bodies that have outwardly telescoping prograde metamorphic isograds and display extensive retrograde metamorphism with associated copper mineralization. Three distinct fluid inclusion types are recognized: a low to moderate salinity, high density aqueous fluid (Type I); a low density CO2 fluid (Type II); and a high salinity, high density aqueous fluid (Type III). Fluid inclusion Types I and II predominate whereas Type III inclusions form 〈10% of the fluid inclusion population. All three fluid types are interpreted to have been present during prograde metamorphism. Temperatures and pressures of metamorphism estimated from fluid inclusion microthermometry and isochore calculations are 450°–500° C and 700–1000 bars, respectively. A model is proposed in which the metamorphism at Patapedia was caused by heat transferred from a low to moderate salinity fluid of partly orthomagmatic origin (Type I inclusions). During the early stages, and particularly in the deeper parts of the system, CO2 produced by metamorphism was completely miscible in the aqueous hydrothermal fluid and locally resulted in high XCO2 fluids. On cooling and/or migrating to higher levels these latter fluids exsolved high salinity aqueous fluids represented by the Type III inclusions. Most of the metamorphism, however, took place at temperature-pressure conditions consistent with the immiscibility of CO2 and the hydrothermal fluid and was consequently accompanied by the release of large volumes of CO2 vapour which is represented by Type II inclusions. The final stage of the history of the Patapedia aureole was marked by retrograde metamorphism and copper mineralization of a calcite-free calc-silicate hornfels in the presence of a low XCO2 fluid.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00375345
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  • 7
    Electronic Resource
    Electronic Resource
    Haemopoietic growth factors: their role in cell development and their clinical use (1989)
    Springer
    Cytotechnology 2 (1989), S. 259-267 
    Details
    ISSN: 1573-0778
    Keywords: cell function ; differentiation ; growth factors ; haemopoiesis ; haemopoietic regeneration ; leukaemia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Abstract Mature blood cells are derived from haemopoietic stem cells which grow and proliferate to give rise to progenitor cells more restricted in their proliferation and differentiation capacity. These in turn give rise to cells belonging to any of the haemopoietic lineages. The haemopoietic growth factors interleukin 3, granulocyte-macrophage colony-stimulating factor, granulocyte colony stimulating factor, macrophage colony-stimulating factor and erythropoietin act on haemopoietic cells to promote cell survival, proliferation, differentiation and maturation, as well as many functions of the mature cells. These factors, now purified to homogeneity and molecularly cloned have recently become available. This has facilitated studies of their roles in cell production, and the range of target cells sensitive to them in vitro and in vivo in several species. The latter experimental data led to the first clinical trials where these factors have been used successfully in several clinical settings: erythropoietin to correct the anaemia of renal disease; granulocyte and granulocyte-macrophage colony-stimulating factors to accelerate haemopoietic regeneration after chemotherapy and bone marrow transplantation, and in other situations where increase in the numbers of white cells and stimulation of their function were required. The results to date allow optimism; the clinical use of growth factors not only in haematology and oncology, but in wider fields of medicine may well constitute a major breakthrough in the near future.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00364992
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  • 8
    Electronic Resource
    Electronic Resource
    Penetration of soil aggregates of finite size (1986)
    Springer
    Plant and soil 94 (1986), S. 59-85 
    Details
    ISSN: 1573-5036
    Keywords: Cohesion ; Gossypium hirsutum ; Helianthus annuus ; Penetrometer resistance ; Pisum sativum ; Plastic failure ; Radial stress ; Root diameter ; Root growth pressure ; Soil aggregates ; Tangential stress ; Tensile stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary The axial force required for penetration of soil aggregates by roots of pea (Pisum sativum cv. Greenfeast), cotton (Gossypium hirsutum cv. Sicot 3) and sunflower (Helianthus annuus cv. Hysun) seedlings was measured. Effects of aggregate size and strength on root penetration behaviour were investigated. Maximum axial root growth pressure (P x ) was estimated from the maximum axial root growth force (F max) and mean root diameter. F max, time (T max) to attainF max, andP x all increased with increase in size and strength of aggregates. A significant interactive effect of size and strength of aggregate on root diameter was observed.F max,T max and root diameter were significantly different for different plant species. Maximum penetrometer pressure (P′) was compared with the axial pressures generated during root penetration. The penetrometer probe was found to overestimate the root growth pressure by a factor of 1.8 to 3.8.P x /P′ decreased with increase in size and strength of aggregates. A theory was developed to estimate radial and tangential stresses adjacent to the soil-root interface assuming cylindrical deformation by the root in aggregates of finite size. The stresses were calculated using shear cohesion values, estimated from tensile strength measurements, and with an assumed value of soil internal friction. Radial and tangential stresses adjacent to the root axis increased with increase in dimensionless aggregate radius and aggregate strength. Tensile stress adjacent to the root axis is predicted to result in plastic failure of finite sized aggregates during root penetration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02380590
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  • 9
    Electronic Resource
    Electronic Resource
    Book reviews (1989)
    Springer
    Origins of life and evolution of the biospheres 19 (1989), S. 645-652 
    Details
    ISSN: 1573-0875
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01808124
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  • 10
    Electronic Resource
    Electronic Resource
    Penetration of soil aggregates of finite size (1986)
    Springer
    Plant and soil 94 (1986), S. 43-58 
    Details
    ISSN: 1573-5036
    Keywords: Aggregate size ; Blunt probe ; Penetrometer pressure ; Plastic failure ; Plastic front ; Probe penetration ; Radial stress ; Root penetration ; Tangential stress
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Maximum penetrometer pressure was measured on artificial soil aggregates of finite size (2–29 mm) using blunt probes (total cone angle 60°) driven at 3 mm min−1. Maximum penetrometer pressure increased asymptotically with increase in dimensionless aggregate radius,b/a, wherea andb are the probe and aggregate radii, respectively. A theory was developed for penetration of blunt probes into soil aggregates of finite size. The theory assumed that plastic failure occurs out to a radius,R, and that beyond this only elastic straining occurs. This theory can be applied to estimate the radial and tangential stresses adjacent to a blunt probe. The estimated radial and tangential stresses increased with increase in dimensionless aggregate radius,b/a. The radius of the plastic front,R, around the probe is predicted to increase with increased aggregate size. The results also demonstrate the effect of soil shear cohesion and internal friction angle onR. The results are discussed with reference to root penetration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02380589
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