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  • Electronic Resource  (9)
  • 1980-1984  (9)
  • 1940-1944
  • 1982  (6)
  • 1980  (3)
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  • Electronic Resource  (9)
Years
  • 1980-1984  (9)
  • 1940-1944
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Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Physics of Intermediate Vector Bosons (1982)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Nuclear and Particle Science 32 (1982), S. 443-497 
    Details
    ISSN: 0163-8998
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.ns.32.120182.002303
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Ectodermal dysplasia syndrome: a family study (1980)
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental dermatology 5 (1980), S. 0 
    Details
    ISSN: 1365-2230
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: A boy with an ectodermal dysplasia is presented, together with clinical and laboratory findings. Description of members of the family is included and comparison made with other ectodermal dysplasia syndromes now known to exist. This family closely resembles the recently delineated ‘tooth and nail’ syndrome.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2230.1980.tb01707.x
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  • 3
    Electronic Resource
    Electronic Resource
    Conjugal transfer of nopaline and agropine Ti-plasmids —The role of agrocinopines (1982)
    Springer
    Molecular genetics and genomics 186 (1982), S. 269-274 
    Details
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary The conjugative behaviour of nopaline and agropine Ti-plasmids has been investigated. Using a technique which avoids enrichment of transconjugants on a mating medium we have shown that preculture in the presence of agrocinopines A or B of donor strains harbouring nopaline Ti plasmids promotes plasmid transfer whereas preculture of the same strains in the presence of nopaline has no such effect. Similarly, preculture in the presence of agrocinopines C or D promotes Ti-plasmid transfer from strains harbouring agropine Ti-plasmids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00331861
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Isolation and properties of transfer regulatory mutants of the nopaline Ti-plasmid pTiC58 (1982)
    Springer
    Molecular genetics and genomics 186 (1982), S. 275-281 
    Details
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Conjugal transfer of the nopaline Ti-plasmid pTiC58 is inducible by the phosphorylated opines, agrocinopines A and B. Although the uninduced level of transfer is negligible (〈 10−7 per donor), some transconjugants have been isolated from crosses performed in the absence of agrocinopine. These transconjugants harbour mutant Ti-plasmids that transfer constitutively (〉10−3 per donor). These mutants have several other correlated phenotypes including constitutive uptake of agrocinopine A, supersensitivity to agrocin 84 and the ability to prevent the excretion of agrocin 84 when they are present in the same cell as the agrocin 84 biosynthetic plasmid pAt-84a.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00331862
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  • 5
    Electronic Resource
    Electronic Resource
    Hydrocarbon accumulation in freshwater sediments of an urban catchment (1982)
    Springer
    Hydrobiologia 91-92 (1982), S. 285-292 
    Details
    ISSN: 1573-5117
    Keywords: PAH ; aliphatic hydrocarbons ; sediment ; stormwater
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The top and bottom of two sediment cores collected from an urban receiving basin in NW London, and stormwater samples from the attendant catchment, have been analysed for their hydrocarbon content. In surface sediments, basal sediments and stormwater, total aliphatic hydrocarbon levels are 445–690 µg g−1 dry wt., 43–224 µg g−1 and 0.36–1.10 mg l−1, respectively; and total levels of polyaromatic hydrocarbons (PAHs) are 780–1 100 µg g−1, 310–640 µg g1 and 5.83–18.21 mg l−1, respectively. Biodegradation of aliphatics is assessed by phytane:n-C18 and pristane: n-C17 ratios. Hydrocarbon sources are determined from phytane: pristane ratios, odd: even carbon chain length ratios, the presence of an unresolved complex mixture, and by comparison of the amount of methyl-substituted PAH s with that of the parent compounds. Comparison of total levels between surface and basal sediments shows a 1 to 3 fold increase in total PAHs and a 3 to 10 fold increase in aliphatic hydrocarbons over a 120 year period.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02391945
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  • 6
    Electronic Resource
    Electronic Resource
    Hydrocarbon accumulation in freshwater sediments of an urban catchment (1982)
    Springer
    Hydrobiologia 91-92 (1982), S. 285-292 
    Details
    ISSN: 1573-5117
    Keywords: PAH ; aliphatic hydrocarbons ; sediment ; stormwater
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The top and bottom of two sediment cores collected from an urban receiving basin in NW London, and stormwater samples from the attendant catchment, have been analysed for their hydrocarbon content. In surface sediments, basal sediments and stormwater, total aliphatic hydrocarbon levels are 445–690 µg g−1 dry wt., 43–224 µg g−1 and 0.36–1.10 mg l−1, respectively; and total levels of polyaromatic hydrocarbons (PAHs) are 780–1 100 µg g−1, 310–640 µg g1 and 5.83–18.21 mg l−1, respectively. Biodegradation of aliphatics is assessed by phytane:n-C18 and pristane: n-C17 ratios. Hydrocarbon sources are determined from phytane: pristane ratios, odd: even carbon chain length ratios, the presence of an unresolved complex mixture, and by comparison of the amount of methyl-substituted PAH s with that of the parent compounds. Comparison of total levels between surface and basal sediments shows a 1 to 3 fold increase in total PAHs and a 3 to 10 fold increase in aliphatic hydrocarbons over a 120 year period.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00940119
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  • 7
    Electronic Resource
    Electronic Resource
    Automatic control of a seriesparallel mechanical circulatory assist system in severe uni-or biventricular failure (1980)
    Springer
    Annals of biomedical engineering 8 (1980), S. 57-74 
    Details
    ISSN: 1573-9686
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract Conventional peripherally invasive mechanical circulatory assist methods such as intra-aortic balloon pumping are of only limited hemodynamic benefit in cases of severe left ventricular failure. This article deals with the analysis and testing of a new pumping concept (16), that is theoretically capable of providing adequate circulatory and respiratory assistance in cases of severe uni- or biventricular failure. This assist system combines an intra-aortic balloon pump (a series form of left ventricular assistance) and pulsatile venoarterial membrane oxygenator bypass (a parallel mode of assistance). The combined pulsatile assist system is controlled by a digital microprocessor which provides appropriate phasing relative to the R wave of the ECG. This support system requires only cannulation of femoral or other easily exposed vessels. Blood-gas exchange gas diffusion or massive pulmonary embolism or other perfusion defects. This concept has been tested in a series of experiments with canine models of ventricular failure. The results of this study indicate that (1) balloon pumping becomes much more effective when combined with pulsatile veno-arterial bypass in cases of severe ventricular failure with an attendant hypotensive circulatory state, and (2) the automatic control system is effective in optimizing the performance of the combined assist system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02363171
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  • 8
    Electronic Resource
    Electronic Resource
    Microprocessor control of intra-aortic balloon pumping (1980)
    Springer
    Annals of biomedical engineering 8 (1980), S. 209-224 
    Details
    ISSN: 1573-9686
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine , Technology
    Notes: Abstract An automatic control scheme for the control of intra-aortic balloon pumping has been implemented on a Digital Equipment Corporation LSI-11 micro-processor system and tested in experiments conducted on a mock circulatory loop as well as in a series of acute animal experiments. The control algorithm employed by the digital controller (LSI-11) is identical in form to that employed by Clark et al. (3), and consists of [1] the beat-by-beat evaluation of a performance index that reflects the objectives of balloon pumping, and [2] the adjustment of balloon inflation and deflation times within the diastolic period so as to maximize this performance index according to a steepest ascent algorithm. In order to reduce convergence time and minimize disturbances around the optimum operating point, a scheme that reduces search step size as the search proceeds from initial values is also incorporated in the algorithm. Importantly, this system obeys a bedside measurement constraint in that it requires only readily available physiologic signals for its operation; the ECG for timing purposes, and the central aortic pressure for evaluation of the system performance index. A number of conventional safety features are also implemented in the controller to, for example, guard against untimely balloon inflation in the occurrence of aberrant heart beats. Finally, the ability of this digital controller to reach an optimum independent of the dynamics of the particular pneumatic pumping system utilized, coupled with the flexibility in design capability and relatively low cost of implementation via the microprocessor system, provide a significant advance in the area of the automatic control of intra-aortic balloon pumping.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02364477
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  • 9
    Electronic Resource
    Electronic Resource
    Incidence of heavy metals in street surface sediments: Solubility and grain size studies (1982)
    Springer
    Water, air & soil pollution 17 (1982), S. 87-100 
    Details
    ISSN: 1573-2932
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Samples of surface and gutter sediment from roads within N.W. London have been analyzed for levels of Cd, Cu, Fe, Mn, Pb, and Zn. Sediment and associated metal grading curves are presented and apart from Mn and Fe which reflect natural background levels, the remaining metals show distributions which relate to road type and traffic conditions. For highways carrying the highest traffic densities the concentrations of Cd and Pb are greatest for grain sizes between 100 and 500 µm and an aggregation process is postulated. Residential side street samples show a marked affinity of Cd, Fe, and Zn for the coarsest grain fractions. Laboratory sorption and desorption studies are described and solution concentrations are obtained for Cd, Cu, Mn, Pb, and Zn over 1 to 30 day time periods. Solubility curves are typically variable with time. The relationship of leachate patterns to particle size and sample site location is discussed and its relative importance to Stormwater loadings is considered. Extraction efficiencies for the five metals are found to be independent of road type and in the order Cd 〉 Zn, Cu 〉 Mn 〉 Pb. The relevance of this hierarchy to Stormwater toxicity is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00164094
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