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  • 1
    Electronic Resource
    Electronic Resource
    Partition Chromatography of Aliphatic Acids (1952)
    s.l. : American Chemical Society
    Analytical chemistry 24 (1952), S. 960-965 
    Details
    ISSN: 1520-6882
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ac60066a011
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  • 2
    Electronic Resource
    Electronic Resource
    Accurate three-dimensional quantum scattering studies of long-lived resonances for the reaction He+H+2→HeH++H (1990)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 93 (1990), S. 8085-8097 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The adiabatically adjusting principal-axis hyperspherical (APH) formulation of Pack and Parker for quantum reactive scattering in three dimensions (3D) is used to obtain converged results for the reaction of helium with H+2 (v=1–4) for total angular momentum J=0. The ab initio potential energy surface computed by McLaughlin and Thompson and fitted by Joseph and Sathyamurthy is utilized for the HeH+2 interaction potential. The predicted energy dependence of the accurate 3D state-to-state reaction probabilities show clear evidence for quantum resonances. These resonances are even more numerous than those reported earlier for reduced dimensionality studies of this reaction. The calculated time delays for several of these resonances are found to be over 1 ps. Bending corrected rotating linear model (BCRLM) studies of this same reaction are also reported. These results provide useful insight in sorting out the nature and contribution of the resonances found in the 3D studies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.459339
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  • 3
    Electronic Resource
    Electronic Resource
    Direct calculation of collisional properties that require energy derivatives of the S matrix: Results for the reaction He+H+2(r harp over l)HeH++H (1991)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 95 (1991), S. 2516-2522 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The Darakjian–Hayes direct method for determining quantum lifetimes for three atoms scattering in three physical dimensions is used to determine accurate state-to-state time delays for the reaction of helium with H+2 for total angular momentum J=0. These results are compared with the time delays obtained by numerical differentiation of the S-matrix elements generated using the APH (adiabatically adjusting principal-axis hyperspherical) formulation of Pack and Parker. The direct method was found to be accurate and efficient for calculating the energy derivatives of the S matrix. The calculated eigenvalues of Smith's collision lifetime matrix (eigen lifetimes) for this reaction predict numerous long-lived metastable states, many with lifetimes over 0.5 ps. The extent of the coupling of metastable states to specific scattering states provides an indication of the nature and magnitude of the time delays associated with particular state-to-state scattering processes. The direct method for calculating the energy derivatives of the S matrix is also found to be accurate and efficient for determining the energy derivative of the cumulative reaction probability.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.460956
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  • 4
    Electronic Resource
    Electronic Resource
    Problems Caused by Filamentous Bacteria in Pilot-Scale Nutrient-Removal Activated-Sludge Plants (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: Sludges from two pilot-scale nutrient-removal activated-sludge plants (a modified three-stage Bardenpho process and a Phostrip plant) were analysed and the results examined, primarily, in relation to the formation of stable foam. The survey showed that both units produced stable foam, but this did not appear to be related either to temperature or to the more conventional operational parameters (sludge age, F:M ratio). The dominance of the sludge by Microthrix parvicella was related to the amount of uronic acids in the extracellular polymers produced by the sludge. The results also indicated that (a) the addition of fermenter elutrient, which was used to produce supplementary readily degradable COD, stimulated foam formation, and (b) the degree of phosphorus removal might also be implicated in the production of foam – and requires further scrutiny.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.1999.tb01021.x
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  • 5
    Electronic Resource
    Electronic Resource
    THE RESTORATION OF WOODS MILL LAKE (2004)
    Oxford, UK : Blackwell Publishing Ltd
    Water and environment journal 18 (2004), S. 0 
    Details
    ISSN: 1747-6593
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Woods Mill Lake is the centrepiece of a nature reserve at Henfield in Sussex, UK. During the last forty years, the lake has undergone a succession of changes, and this has resulted in loss of depth and encroachment of the reed-bed. In the summer months the large carp population was suffering stress due to shallow water. The problem of silt excavation required extensive discussion with statutory agencies: in addition, the work had to be scheduled around nesting birds, breeding newts and school visits. This paper (a) discusses the complexity of the work which was undertaken, and (b) provides an analysis of the fish population which was removed from the lake.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.2004.tb00486.x
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  • 6
    Electronic Resource
    Electronic Resource
    On-Line Toxicity Monitoring Using Amtox (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: As environmental legislation around the world becomes more stringent, it is vital that biological systems are able to treat the effluents which are discharged from wastewater-treatment plants. Conventional treatment such as BOD removal has been achieved successfully for many years, but the requirements for toxicity removal are more onerous. The Amtox system, which was designed to give operators of wastewater-treatment plants a tool for assessing the toxicity/treatability, uses an immobilized culture of nitrifying bacteria, maintained in a heated aerobic reactor, to determine whether or not a waste is degradable. The system has a broad range of applications from treatability tests to process monitoring and toxicity tracing and, by changing the culture, effluent toxicity monitoring.This paper details two case studies: (i) in an abattoir where an Amtox monitor was used to diagnose the source of toxicity, and (ii) on the River Trent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1747-6593.1999.tb01055.x
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  • 7
    Electronic Resource
    Electronic Resource
    Erratum: Direct calculation of collisional properties that require energy derivatives of the S matrix: Results for the reaction He+H+2=HeH++H [J. Chem. Phys. 95, 2516 (1991)] (1994)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 101 (1994), S. 9203-9203 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.468508
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  • 8
    Electronic Resource
    Electronic Resource
    Electrode-modified zeolites: electrode microstructures contained in and on a heterogeneous catalyst (1989)
    s.l. : American Chemical Society
    The @journal of physical chemistry 〈Washington, DC〉 93 (1989), S. 5524-5531 
    Details
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/j100351a040
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  • 9
    Electronic Resource
    Electronic Resource
    Assignment of peaks in photodetachment spectra using predicted densities of reactive states: Application to H2F− and D2F− (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 97 (1992), S. 4881-4889 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Accurate cumulative reaction probabilities and densities of reactive states have been obtained for the reactions F+H2→H+HF and F+D2→D+DF using the hyperspherical (APH) coordinate scattering method developed by Pack and Parker. Results for scattering energies ranging from threshold to 0.7 eV above threshold have been obtained using two different potential energy surfaces that have been proposed for this system. The predicted peaks in the densities of reactive states are due to the presence of scattering resonances. The characteristic steps in the cumulative reaction probabilities are used to identify the resonance peaks due to quantized dynamical bottlenecks. The trapped-state or Feshbach-type resonances are identified by narrow oscillations in the density of reactive states. The positions of these resonance peaks in the density of reactive states are in good agreement with the peaks in the Franck–Condon factors for the photodetachment of H2F− and D2F−. Significant changes in resonance types are found for the T5a and 5SEC potential energy surfaces for H2F. While the assignment of resonance peaks presented is in reasonable agreement with the assignments suggested by Hahn and Taylor based on their classical mechanical analysis, there are some differences that will require further study.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.463842
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  • 10
    Electronic Resource
    Electronic Resource
    Scanning Force Microscopy and Its Application to Engineered Materials (1993)
    s.l. ; Stafa-Zurich, Switzerland
    Key engineering materials Vol. 86-87 (July 1993), p. 231-236 
    Details
    ISSN: 1013-9826
    Source: Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://www.tib-hannover.de/fulltexts/2011/0528/01/59/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.86-87.231.pdf
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