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  • 1995-1999  (2)
  • 1985-1989  (7)
  • 1997  (2)
  • 1985  (7)
  • 1
    Electronic Resource
    Electronic Resource
    Electron transport studies of gas mixtures for use in e-beam controlled diffuse discharge switches (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 58 (1985), S. 3001-3015 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Gas mixtures for possible use in diffuse discharge switching applications require both high dielectric strength and specific electron transport properties in the conducting and the opening stages of the operation of the switch. In the conducting stage, the electron drift velocity must be large, and the electron loss processes (e.g., due to electron attachment and recombination) must be low so as to maximize the current in the discharge while maintaining low-discharge impedance. In the opening stage, strong electron attachment along with high dielectric strength is required of the gas mixtures in order to extinguish the discharge as quickly as possible (and, thus, achieve a fast opening time) and to prevent arcing occurring between the switch electrodes due to the high voltages induced across the switch in the opening phase. Measurements of the electron drift velocity, attachment, ionization and transverse diffusion coefficients, and high-voltage dielectric strengths of several gas mixtures proposed as candidates for use in diffuse discharge switching applications have been made and are reported and discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335849
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Penning ionization ternary gas mixtures for diffuse discharge switching applications (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 58 (1985), S. 633-641 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The increase in the total ionization produced by high-energy α particles in Ar/C2F6 mixtures, which have conduction and insulation properties appropriate for use in diffuse discharge switching applications by addition of low ionization energy additives has been quantitatively studied. The energy to produce an electron-positive ion pair (ip) W in C2F6 was found to be 34.7 eV/ip; this rather high value is attributed to the large cross section for electron impact-induced dissociation of C2F6. The W values of Ar/C2F6 mixtures have also been measured and are reported; they increase with increasing C2F6 content. The W values of Ar/C2F6 binary gas mixtures have been found to decrease by addition of C2H2 or 2-C4H8. Quantitative measurements of the W values of the ternary gas mixtures are reported. The amounts of C2H2 or 2-C4H8 in Ar/C2F6, which maximize the increase in total ionization have been estimated; some of these ternary gas mixtures may be useful for diffuse discharge switches sustained by external electron beams. The experimental results on the W values for the binary and ternary gas mixtures studied have been modeled and good agreement has been found between the experimental and the calculated results. From an analysis of the data it has been found that the α-particle energy is partitioned between C2F6 and Ar approximately in the ratio 4.2:1. It has also been found that at the argon pressures employed, the probability of deexcitation of excited argon atoms by C2F6 (or C2H2 or 2-C4H8) molecules is more than three orders of magnitude larger than the probability of radiative deexcitation of the excited argon atoms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.336201
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Operating stability of light-emitting polymer diodes based on poly(p-phenylene vinylene) (1997)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 71 (1997), S. 34-36 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have developed modified poly(p-phenylene vinylene) (PPV) to improve its performance in organic electroluminescent devices. Encapsulated single-layer devices with this PPV on indium–tin oxide and a calcium cathode have been operated in air for 〉7000 h at 20 °C and 〉1100 h at 80 °C without noticeable degradation. Devices fabricated with this PPV, a conducting polymer layer as anode, and a sputtered low work-function alloy as cathode have efficiencies of over 2 lm/W, brightnesses of 〉600 Cd/m2 at 4 V, and lifetimes of 〉1400 h driven at ∼100 Cd/m2 initial brightness. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.119483
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  • 4
    Electronic Resource
    Electronic Resource
    Recovery from day-case anaesthesia (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 40 (1985), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Sixty unpremedicated patients undergoing dilatation and curettage were allocated randomly to receive one of three inhalational agents (halothane, enflurane or isoflurane) to supplement 67% nitrous oxide in oxygen after induction of anaesthesia with methohexitone. Recovery was assessed by the time patients took to open their eyes, to give their correct date of birth, to regain their pre-operative level of manipulative skill with a children's postbox toy, and by comparing pre-operative and postoperative performance of a paper and pencil test (the p-deletion test). There was no difserence in the time to open eyes or to regain their pre-operative score with the postbox whether the patients received halothane, enflurune or isoflurane. Patients in the isoflurane group took longer than patients in the enflurane group to give their correct date of birth, but they performed better in the p-deletion test postoperatively, completing more lines with the same number of errors. Patients receiving enflurane committed more errors postoperatively in the p-deletion test. The incidence of complications was low and was not influenced by the choice of inhalational agent.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1985.tb10892.x
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  • 5
    Electronic Resource
    Electronic Resource
    The ‘Permox’ oxygen concentrator (1985)
    Oxford, UK : Blackwell Publishing Ltd
    Anaesthesia 40 (1985), S. 0 
    Details
    ISSN: 1365-2044
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The performance of the ‘Permox’ oxygen concentrator has been investigated in detail with particular reference to its possible use as an alternative to conventional oxygen supplies both in the emergency situation, in the event of failure of pipeline or cylinder systems or when these are unavailable. The stability and concentrations of oxygen produced at various flows provided a viable alternative supply of oxygen, and the portability and reliability of this particular apparatus made it suitable for use in the many situations considered.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2044.1985.tb10896.x
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Repudiation of Contract—Whether Election Fettered (1985)
    Cambridge : Cambridge University Press
    The @Cambridge law journal 44 (1985), S. 18-21 
    Details
    ISSN: 0008-1973
    Source: Cambridge Journals Digital Archives
    Topics: Law
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1017/S0008197300114345
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    Paper (German National Licenses)
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  • 7
    Electronic Resource
    Electronic Resource
    Injury to potato leaves exposed to subzero temperatures in the absence of freezing (1985)
    Springer
    Planta 164 (1985), S. 512-516 
    Details
    ISSN: 1432-2048
    Keywords: Chilling injury ; Solanum ; Temperature (chilling) ; Undercooling
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Electrolyte leakage was measured in “hardened” and “nonhardened” leaves of three potato species, Solanum tuberosum L., S. acaule Bitt. and S. commersonii Dun., and one interspecific cross, “Alaska Frostless” (S. acaule x S. tuberosum) when exposed to various subzero temperatures. The leaves were undercooled (no ice present) from 0°C to -12.5°C for 45 min and to-4°C for up to 10 d. Regardless of the degree of undercooling no injury was observed in any of the potatoes, “hardened” or “nonhardened”, for up to 12 h. After 5 d, however, electrolyte leakage was observed in “hardened” S. tuberosum, S. acaule and S. commersonii, and in “nonhardened” “Alaska Frostless”. After 10 d exposure all potatoes, “hardened” and “nonhardened”, showed a significant amount of electrolyte leakage as compared to their controls kept at 0°C for 10 d.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00395968
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    Paper (German National Licenses)
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  • 8
    Electronic Resource
    Electronic Resource
    Hydroxylamine oxidation in heterotrophic nitrate-reducing soil bacteria and purification of a hydroxylamine-cytochrome c oxidoreductase from a Pseudomonas species (1997)
    Springer
    Archives of microbiology 166 (1997), S. 421-424 
    Details
    ISSN: 1432-072X
    Keywords: Key words Nitrification ; Hydroxylamine-cytochrome c oxidoreductase ; Ammonia monooxygenase ; Denitrification ; Pseudomonas sp.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Hydroxylamine oxidation was measured in four recently isolated heterotrophic nitrate-reducing bacteria belonging to the genera Pseudomonas, Moraxella, Arthrobacter and Aeromonas. A hydroxylamine-cytochrome c oxidoreductase activity was detected in periplasmic fractions of the Pseudomonas and Aeromonas spp. and in total soluble fractions of the Arthrobacter sp. A monomeric 19-kDa non-haem iron hydroxylamine-cytochrome c oxidoreductase was purified from the Pseudomonas species and shown to be similar to hydroxylamine-cytochrome c oxidoreductase of Paracoccus denitrificans.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01682991
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  • 9
    Electronic Resource
    Electronic Resource
    Determination of residual stresses in denture base polymers using the layer removal techniqueThis paper is based on a thesis submitted in partial fulfillment of the M.S. degree in Oral Sciences (K. M. Murphy), State University of New York at Buffalo, New York 14214. (1985)
    Hoboken, NJ : Wiley-Blackwell
    Journal of Biomedical Materials Research 19 (1985), S. 971-980 
    Details
    ISSN: 0021-9304
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Medicine , Technology
    Notes: In order to study the influence of residual stresses on dimensional accuracy and mechanical properties of denture bases, an experimental model was devised for measurement of residual stresses in acrylic denture base polymers. Rectangular bar coupons were cut from resin plates heat processed by conventional dental methods. They included samples which had been slow and fast cooled after polymerization and had been stored in dry and wet environments. Uniaxial residual stress distributions for each coupon were disclosed by removing layers of known thicknesses and measuring the ensuing deflection of the specimens. Coupons of a commercial acrylic resin were annealed and used as controls. ANOVA and Scheffe's test were used to compare experimental conditions at the 95% confidence level. Dry specimens exhibited residual surface compressive stresses from 0.43-0.83 MPa (62-120 psi). Water-stored specimens showed higher stress levels, 2.86-3.24 MPa (414-470 psi). Slow cooled pigmented acrylic coupons which were dry showed higher residual stresses compared with other dry but nonpigmented specimens. No significant differences were found between pigmented or clear coupons which contained moisture.
    Additional Material: 5 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/jbm.820190808
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