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  • 1
    Electronic Resource
    Electronic Resource
    A Pipeline Testing Facility for the Examination of Pipe-Wall Deposits and Red-Water Events in Drinking Water (1999)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 13 (1999), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Field surveys of Thames Water's distribution mains found the occurrence of ‘red water’ to be highly variable and localized. To model the many inter-related factors identified in the field, a controlled pipeline-testing facility was required to simulate conditions in a ‘live’ network, but on a pilot-scale. This was achieved by incorporating a specialized red-water testing facility into an existing experimental pipeline.This paper describes the hydraulic and material design features, including the addition of a ‘dead-end’ section operated on a stagnation and flow regime, quantified using computational fluid dynamics. Following commissioning, the facility has provided detailed, time-sequenced observations on corrosion-deposit development and red-water generation under different hydraulic regimes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.1999.tb00999.x
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  • 2
    Electronic Resource
    Electronic Resource
    Physiological Interactions Between Symbionts in Vesicular-Arbuscular Mycorrhizal Plants (1988)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Plant Physiology and Plant Molecular Biology 39 (1988), S. 221-244 
    Details
    ISSN: 1040-2519
    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.39.060188.001253
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  • 3
    Electronic Resource
    Electronic Resource
    Mineral Metabolism (1947)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Biochemistry 16 (1947), S. 273-290 
    Details
    ISSN: 0066-4154
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.bi.16.070147.001421
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  • 4
    Electronic Resource
    Electronic Resource
    Functional diversity in arbuscular mycorrhizas: exploitation of soil patches with different phosphate enrichment differs among fungal species (2005)
    Oxford, UK : Blackwell Science Ltd
    Plant, cell & environment 28 (2005), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Most terrestrial plant species form associations with arbuscular mycorrhizal fungi (AMF) that transfer soil P to the plant via their external hyphae. The distribution of nutrients in soils is typically patchy (heterogeneous) but little is known about the ability of AMF to exploit P patches in soil. This was studied by growing symbioses of Linum usitatissimum and three AMF (Glomus intraradices, G. mosseae and Gigaspora margarita) in pots with two side-arms, which were accessible to hyphae, but not to roots. Soil in one side-arm was either unamended (P0) or enriched with P; simultaneous labelling of this soil with 32P revealed that G. intraradices responded to P enrichment both in terms of hyphal proliferation and P uptake, whereas the other AMF did not. Labelling with 33P of P0 soil in the other side arm revealed that the increased P uptake by G. intraradices from the P-enriched patch was paralleled by decreased P uptake by other parts of the mycelium. This is the first demonstration of variation in growth and nutrient uptake by an AMF as influenced by a localized P enrichment of the soil. The results are discussed in the context of functional diversity of AMF.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.2005.01310.x
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  • 5
    Electronic Resource
    Electronic Resource
    Effects of Pollination Method on Strain Cross Yield in Lucerne (1989)
    Oxford, UK : Blackwell Publishing Ltd
    Plant breeding 102 (1989), S. 0 
    Details
    ISSN: 1439-0523
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Because of difficulties in pollination, control, F1 hybrids have not been widely explioted in lucerne’ (Medicago sativa L.). Strain crossing (uncontrolled hybridization between two or more self-fertile populations with seed of the populations combined to product a “strain cross” population) represents a potentially valuable alternative procedure for exploiting heterosis in this species. Strain crosses in lucerne are typically produced using insect pollination in the field. Using hand pollination under glasshouse houses could increase the number of strain crosses available for tests of combining ability. The objective of this study was to determine whether forage yield of strain crosses produced using hand pollination were sufficiently similar to that of insect-produced populations to allow the use of the former in lucerne breeding. Forage yields of eight pairs of hand- and insect-produced strain crosses did not differ significantly in 15 of 16 pairwise comparisons and were positively correlated (rs= 0.90) for 20 harvests at two locations. Yield amp of band produced strain crosses could be used, with reasonable accuracy to accuracy the eventual performance of strain crosses produced between the same populations using insect pollination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1439-0523.1989.tb00318.x
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  • 6
    Electronic Resource
    Electronic Resource
    Inactivation of Isoniazid in Burmese Subjects (1968)
    [s.l.] : Nature Publishing Group
    Nature 217 (1968), S. 1273-1273 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Isoniazid (10 mg/kg orally) was administered to 121 Burmese subjects, seventy-nine males and forty-two females, aged between 18 and 38. Venous blood samples were taken 6 h later, the serum was separated and extracted and the concentration of isoniazid was estimated by a vanillin condensation ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/2171273a0
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  • 7
    Electronic Resource
    Electronic Resource
    Paternal plastid inheritance in alfalfa: plastid nucleoid number within generative cells correlates poorly with plastid number and male plastid transmission trength (1991)
    Springer
    Current genetics 19 (1991), S. 399-401 
    Details
    ISSN: 1432-0983
    Keywords: Cytoplasmic inheritance ; DAPI fluorochrome ; Medicago sativa ; Plastid DNA
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary A previous study on alfalfa determined that the number of plastids/generative cell does not necessarily correlate with male plastid transmission strength in a given genotype. The objectives of the present study were to learn (1) whether plastid nucleoid number/generative cell is comparable to the number of plastids/generative cell, and (2) whether plastid nucleoid number/generative cell correlates with known male plastid transmission behavior in three alfalfa genotypes. Our results, which were based upon 150 generative cells examined by DAPI/epifluorescence microscopy, indicate that the mean plastid nucleoid number/generative cell is much less than the mean number of plastids/generative cell in genotype 7W (60 nucleoids/264 plastids) and genotype 301 (54 nucleoids/165 plastids). In genotype MS-5, mean plastid nucleoid number/generative cell (45) is similar to the mean number of plastids/generative cell (65). The significantly fewer plastid nucleoids/generative cell in MS-5, compared to that of 7W and 301, correlates positively with the relatively poor male plastid transmission strength of this genotype. However, the difference between the mean number of plastid nucleoids/generative cell in 7W and 301 is not significant, yet 301 is a much stronger transmitter of male plastids than is 7W.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00309602
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  • 8
    Electronic Resource
    Electronic Resource
    Variation in generative cell plastid nucleoids and male fertility in Medicago sativa (1995)
    Springer
    Sexual plant reproduction 8 (1995), S. 308-312 
    Details
    ISSN: 1432-2145
    Keywords: Alfalfa ; Chloroplast ; Organelle inheritance ; Pollen
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Biparental inheritance of plastids has been documented in numerous angiosperm species. The adaptive significance of the mode of plastid inheritance (unior biparental) is poorly understood. In plants exhibiting paternal inheritance of plastids, DNA-containing plastids in the microgametophyte may affect survival or growth of the gametophyte or the embryo. In this study the number of plastids containing DNA (nucleoids) in generative cells and generative cell and pollen volumes were evaluated in a range of genotypes of Medicago sativa (alfalfa). M. sativa exhibits biparental inheritance of plastids with strong paternal bias. The M. sativa genotypes used were crossed as male parents to a common genotype and the relationships between the gametophytic traits measured and male reproductive success were assessed. Generative cell plastid number and pollen grain size exhibited opposing associations with male fertility. Path analysis showed that generative cell plastid number was negatively associated with male fertility. This study provides evidence that there may be a competitive advantage at fertilization afforded sperm that have minimized their organelle content. The apparent lack of strong selection for reduced plastid number in generative cells of M. sativa may be a reflection of the diminished importance of reproductive success due to its perenniality or its long use in cultivation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00229388
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  • 9
    Electronic Resource
    Electronic Resource
    Differential cardiovascular effects of propranolol, atenolol, and pindolol measured by impedance cardiography (1992)
    Springer
    European journal of clinical pharmacology 42 (1992), S. 47-53 
    Details
    ISSN: 1432-1041
    Keywords: Atenolol ; Propranolol ; Pindolol ; transthoracic electrical bioimpedance ; cardiac output ; healthy volunteers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary We have evaluated Sramek's method of impedance cardiography as a non-invasive way of detecting the cardiovascular effects of drugs. We made cardiovascular measurements using the method during passive tilting and exercise 2 h after the oral administration of atenolol (50 and 100 mg), propranolol (40 and 80 mg), pindolol (5 and 10 mg), and placebo in seven separate studies involving eight healthy male volunteers. Equivalent doses of the pure antagonists atenolol (β1) and propranolol (β1, β2) produced similar reductions in heart rate, systolic blood pressure, and cardiac index, and increases in stroke volume and total peripheral resistance, particularly during exercise. In contrast the partial agonist pindolol produced increases in heart rate and cardiac index, and reductions in peripheral resistance at rest. During passive tilting and exercise pindolol reduced heart rate, but cardiac output and total peripheral resistance were unchanged except at the highest levels of exercise. The similar cardiovascular effects of atenolol and propranolol, but differing effects of pindolol, are consistent with reports using other methods of measurement. This suggests that impedance cardiography may have a place in the non-invasive assessment of the cardiovascular effects of drugs.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00314919
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  • 10
    Electronic Resource
    Electronic Resource
    The pharmacokinetics of indoramin and 6-hydroxyindoramin in poor and extensive hydroxylators of debrisoquine (1987)
    Springer
    European journal of clinical pharmacology 33 (1987), S. 59-65 
    Details
    ISSN: 1432-1041
    Keywords: indoramin ; 6-hydroxyindoramin ; debrisoquine ; hydroxylators ; genetic polymorphism ; blood pressure ; pharmacokinetics ; healthy volunteers
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary Five poor metabolisers (PM) and seven extensive metabolisers (EM), of debrisoquine, all healthy volunteers, received 50 mg indoramin orally following an overnight fast. Plasma concentrations of indoramin and 6-hydroxyindoramin were determined by HPLC with fluorimetric detection. In PM subjects, mean values of Cmax (158 ng/ml) and AUC(0–24) (2556 ng·h·m−1) for indoramin were substantially elevated and t1/2β (18.5 h) prolonged by comparison with values in the EM subjects (21.6 ng/ml, 151 ng·h·ml−1 and 5.2 h respectively). For 6-hydroxyindoramin, on the other hand, Cmax (12.4 ng/ml) and AUC(0–8) (47.5 ng·h·ml−1) in PM subjects were significantly lower than in the EM subjects (28.2 ng/ml and 94.7 ng·h·ml−1). There was a tendency to a higher incidence of side-effects in the PM group. Although the difference did not achieve statistical significance (0.1〉p〉0.05), all the PM subjects experienced sedation compared to only two in the EM group. Differences in blood pressure and pulse rate between the two groups were small. It is concluded that the oxidative metabolism of indoramin is subject to genetic polymorphism, which is probably under the control of the same gene locus as that influencing debrisoquine oxidation. The clinical consequences are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00610381
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