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  • 1
    Electronic Resource
    Electronic Resource
    Proton Polarization at ∼ 130 MeV. (1954)
    [s.l.] : Nature Publishing Group
    Nature 173 (1954), S. 946-948 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Nucleon polarization is detected in a double-scattering experiment. If the angle between the normals to the two scattering planes is 9 and the angles of the first and second scatterings are 0! and 02, then it may be shown that the asymmetry, e, in the beam intensities J(p) after the second ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/173946a0
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  • 2
    Electronic Resource
    Electronic Resource
    Production of Beryllium-7 by Proton Bombardment of Carbon (1950)
    [s.l.] : Nature Publishing Group
    Nature 166 (1950), S. 235-235 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Graphite disks of high purity were irradiated for about one minute, and were found to emit y-rays with a half-life of about fifty days and energy about 0-5 MeV. (measured by absorption in lead), in addition to the 20-min. positron activity from the well-known1 reaction C18(p,pra)Cn. Radiochemical ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/166235a0
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  • 3
    Electronic Resource
    Electronic Resource
    Comparison of white clover varieties under cutting and grazing (1992)
    Oxford, UK : Blackwell Publishing Ltd
    Grass and forage science 47 (1992), S. 0 
    Details
    ISSN: 1365-2494
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Seven varieties of white clover (Trifolium repens L.), of varying leaf size from large to small, were sown with perennial ryegrass (Lolium perenne L.) in 1985, at an upland site, and compared over three harvest years under a cutting management (5-6 cuts), and under continuous grazing by sheep. Fertilizer N input totalled 80 kg ha−1 in both the cutting and the grazing trial. The same varieties were included in two official National List (NL) trials sown the same year at a nearby site; these comprised a yield trial with 6-7 cuts and a persistency trial mown very frequently (17 cuts) to simulate intensive grazing.At the upland site the large-leaved varieties, Milkanova and Blanca, were the highest yielding under cutting (mean 3·3 t DM ha−1), and the small-leaved S184 and Kent the lowest yielding (mean 2·3 t DM ha−1). The rankings were reversed under grazing (corresponding yields 1·1 and 2·1 t DM ha−1). The medium-leaved varieties Donna, Menna and Grasslands Huia behaved similarly to the large-leaved varieties. Ranking order in the cutting trial was similar to that in the NL trial.Ground covers after three harvest years differed significantly only under grazing, when the small-leaved varieties had a 2-3 times greater cover than the larger-leaved varieties. A poor separation of the varieties in the NL persistency trial suggests that defoliation was not sufficiently severe to simulate intensive grazing.These comparisons indicate that the performance of clover varieties under the cutting regimes used should not be extrapolated to continuous sheep grazing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2494.1992.tb02241.x
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  • 4
    Electronic Resource
    Electronic Resource
    Free Energy Parameters for Reverse Osmosis Separations of Undissociated Polar Organic Solutes in Dilute Aqueous Solutions (1976)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 15 (1976), S. 149-161 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/i260057a026
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  • 5
    Electronic Resource
    Electronic Resource
    Predictability of Reverse Osmosis Separations of Partially Dissociated Organic Acids in Dilute Aqueous Solutions (1976)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 15 (1976), S. 350-357 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/i260058a023
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  • 6
    Electronic Resource
    Electronic Resource
    Aromatic hydrocarbon-water separations by a pressure-driven membrane separation process (1983)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 22 (1983), S. 625-632 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/i200023a013
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  • 7
    Electronic Resource
    Electronic Resource
    Transport Characteristics in the Reverse Osmosis System p-Chlorophenol-Water-Cellulose Acetate Membrane (1979)
    s.l. : American Chemical Society
    Industrial and engineering chemistry 18 (1979), S. 641-647 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/i260072a012
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  • 8
    Electronic Resource
    Electronic Resource
    Heavy metal pollution in Antarctica: a molecular ecotoxicological approach to exposure assessment (2000)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 57 (2000), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Trematomus bernacchii sampled from two sites at Ross Island, Antarctica, were assessed for condition (gonadal and hepatic somatic indices and condition factor), pathological state (liver and gill histology), hepatic metal (Zn, Cu, Cd and Ni) concentrations, and metallothionein induction by quantitative competitive (qc) RT-PCR. Fish from a polluted site (Winter Quarters Bay) had pathological anomalies including necrosis and periductal inflammation in their livers, and X-cell disease, epithelial hyperplasia, lamellar fusion and aneurysms in their gills. Such anomalies were less common in fish from a relatively pristine site (Backdoor Bay, Cape Royds). Fish from both sites had similar liver concentrations of Zn, Cu and Cd and qcRT-PCR revealed similar levels of hepatic metallothionein mRNA. Ni in the livers of fish from Winter Quarters Bay were higher than those in fish from Backdoor Bay, but the differences were not great enough to affect hepatic metallothionein mRNA significantly. Despite the polluted state of Winter Quarters Bay waters, it seems that the heavy metals present may have only limited impact on the health status of fish collected from this locality. This may reflect a low bioavailability of the heavy metals in Ross Island marine sediments and suggests that other factors, such as relatively high levels of organic pollutants (PAHs, PCBs) or pathogens from the nearby sewage outlet, may play a more significant role in the aetiology of pathological conditions in fish from Winter Quarters Bay.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.2000.tb02241.x
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  • 9
    Electronic Resource
    Electronic Resource
    Modeling of reverse osmosis in the presence of strong solute-membrane affinity (1993)
    Hoboken, NJ : Wiley-Blackwell
    AIChE Journal 39 (1993), S. 434-445 
    Details
    ISSN: 0001-1541
    Keywords: Chemistry ; Chemical Engineering
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Notes: Modeling of reverse osmosis in the presence of strong solute-membrane affinity has always been a challenge due to the complexity of the solute-solvent-membrane interactions and the resultant effect on membrane performance. Most transport models, including all models treating membranes as nonporous and those based on irreversible thermodynamics, are unable to describe or to predict all of the phenomena associated with this case. Recently, the modified surface force-pore flow model has been derived and used to describe the performance of reverse osmosis membranes for solutes which are rejected from the membrane. In the present work, this model is extended to a more general form which can describe the solute-membrane affinity case. For illustration, the extended model, with five adjustable parameters, is used to describe the performance for cellulose acetate membranes and dilute aqueous solutions of toluene, cumene, and p-chlorophenol (data from literature). The model is reasonably consistent with the data. Simulation results of the extended model are also shown.
    Additional Material: 8 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/aic.690390307
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  • 10
    Electronic Resource
    Electronic Resource
    The detection of post-meiotic segregation without tetrad analysis in Ustilago maydis (1977)
    Springer
    Molecular genetics and genomics 153 (1977), S. 331-335 
    Details
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Post-meiotic segregation (PMS) results in the formation of mixed genotypes from single meiotic products. A method is described in which single members of tetrads are selected, and these are then tested for their genetic homogeneity. The method is applied to Ustilago maydis using crosses which are heteroallelic for nar 1, the structural gene for nitrate reductase. In the absence of PMS, meiotic products containing a nar + recombinant are genetically pure (the equivalent of a 6 mutant: 2 wild-type octad). With PMS, a nar + recombinant clone arises in association with a nar - clone and these are otherwise genetically identical (the equivalent of a 7 mutant: 1 wild type octad). The procedure will make it possible to search for mutant strains which are defective in the correction of mismatched bases in hybrid DNA formed during recombination. Among 26 nar + recombinants from a control cross, PMS was detected on 3 occasions. In an equivalent cross, both parents were uvs 3, a mutant defective in the excision of pyrimidine dimers from DNA. Among 43 nar + recombinants, 7 arose from PMS. Thus the frequency of PMS for the nar alleles is about 15% and the excision of pyrimidine dimers is probably unrelated to the repair of mismatched bases in hybrid DNA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00431598
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