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  • 1990-1994  (37)
  • 1955-1959
  • 1945-1949
  • 1993  (37)
  • 1
    Electronic Resource
    Electronic Resource
    K-shell x-ray yield scaling for aluminum x-pinch plasmas (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 8134-8138 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report results from experiments performed to measure and characterize the intense K-shell radiation from aluminum x-pinch plasmas at peak driving currents ranging from 280 kA to 1.0 MA. Single pulse aluminum K-shell (predominantly line radiation at 1.6–2 keV) x-ray yields ranged from 7.6 J at 290 kA to 240 J at 1.0 MA. In the range from 280 to 470 kA, the yield scales with current to the power of 3.6, whereas nonoptimized K-shell yields at 800 kA and 1.0 MA indicate a power of about 3 or higher.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.353452
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Inductively driven gas-breakdown plasma source for intense ion beam production (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 2737-2745 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A plasma source based on an inductive breakdown of a supersonic gas puff is described. The source was developed to provide an anode plasma for an annular, extraction geometry, magnetically insulated ion diode. In this source, plasmas with densities of 1013 cm−3 were generated and accelerated to velocities of 20–30 cm/μs; plasma fluxes of 10–40 A/cm2 were obtained. Operating the source under the diode insulating field effect, plasma fluxes above 100 A/cm2 were observed. When the plasma source was used in conjunction with a magnetically insulated diode gap, intense ion beams with proton fluxes of more than 100 A/cm2, energies of 100 keV, and beam pulses longer than 1 μs were extracted.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144412
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    RETROSPECTIVE ASSESSMENT OF THORACIC RADIOGRAPHIC FINDINGS IN METASTATIC CANINE HEMANGIOSARCOMA (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Veterinary radiology & ultrasound 34 (1993), S. 0 
    Details
    ISSN: 1740-8261
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Twenty-one dogs with histopathologically confirmed hemangiosarcoma were evaluated by thoracic radiography for metastatic disease. All dogs had histopathologic examinations of the lungs within two weeks of thoracic radiography. Fourteen dogs had histopathologic evidence of pulmonary hemangiosarcoma; metastatic disease was detected radiographically in eleven of these dogs. The most common radiographic pattern was that of poorly defined small coalescing nodules (8 dogs); other radiographic patterns included well-circumscribed nodules (3 dogs) and alveolar infiltrates secondary to hemorrhage (2 dogs). Differential diagnoses for diffuse, poorly defined, coalescing pulmonary opacities should include hemangiosarcoma in addition to edema, lymphoma, systemic mycoses, fibrosis, allergy, toxicosis, and carcinomas.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1740-8261.1993.tb01568.x
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  • 4
    Electronic Resource
    Electronic Resource
    Ion ring propagation in a magnetized plasma (1993)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 5 (1993), S. 3069-3087 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The propagation of an ion ring in a 2.5 m long, 0.30 m diam magnetized plasma column was studied using an axial array of magnetic probes and fast proton detectors, a microwave interferometer, and a grating spectrometer. The ring propagated with an initial axial velocity 3×106 m/sec, about four times the Alfvén speed in the plasma, and excited damped magnetosonic waves whose peak amplitude depended on the plasma return current. The plasma electrons were heated by about 1 eV in response to the ring, as measured by the Hγ line-to-continuum intensity ratio. This heating is primarily attributed to classical Coulomb collisions, although about 1%–10% can be attributed to the collective ring–plasma interaction. The collective interaction had no measurable effect on the dynamics of the ion ring, consistent with theoretical models, given the beam, plasma, and magnetic-field parameters in the experiment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.860639
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  • 5
    Electronic Resource
    Electronic Resource
    HEPARIN-ASSOCIATED THROMBOCYTOPENIA AND THROMBOSIS (HATT) PRESENTING WITH LIVEDO RETICULARIS (1993)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of dermatology 32 (1993), S. 0 
    Details
    ISSN: 1365-4632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background. Heparin-associated thrombocytopenia and thrombosis (HATT) is an infrequently encountered syndrome characterized by ischemic necrosis of soft tissue and vital organs following anticoagulation with heparin. The syndrome is thought to be due to heparin-dependent platelet aggregation and thrombosis, which is mediated by pathologic immunoglobulins. Case Report. A 60-year-old man developed truncal livedo reticularis and ischemic necrosis of the left foot associated with thrombocytopenia, disseminated intravascular coagulopathy (Die), and microangiopathic hemolytic anemia during intravenous heparin therapy. Skin biopsy from an area of livedo reticularis revealed fibrin thrombi in dermal blood vessels, which is characteristic of HATT. The diagnosis of HATT prompted discontinuation of heparin and a resulting rapid resolution of the livedo reticularis and hematologic abnormalities. No other potential causes of Die were identified, and, other than stopping heparin, no specific therapy was employed. Conclusions. Periodic monitoring of platelets should be performed on all patients receiving treatment with heparin, as early detection of heparin-induced thrombocytopenia followed by discontinuation of the drug may prevent life threatening thrombotic complications. HATT should be included in the differential diagnosis of patients with livedo reticularis that occurs during heparin therapy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-4362.1993.tb04267.x
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  • 6
    Electronic Resource
    Electronic Resource
    Modeling the coaxial double z-pinch for the Al xi - Mg ix laser at 228 A(ring) (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 74 (1993), S. 4303-4309 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A magnetically embedded coaxial z-pinch configuration is proposed for the resonant photoexcitation laser at 228 A(ring) in Mg ix pumped by the 48.338 A(ring) line of Al xi. This laser configuration consists of an annular Al z-pinch plasma imploded (final electron density of about 1020 cm−3) onto an inner, Mg plasma (final electron density of about 1018 cm−3) on the axis. The Mg plasma is confined and stabilized by an axial magnetic Bz field, which is compressed to a final magnitude of about 130 T from an initially applied field of about 1 T by the Al implosion, thus serving to stabilize and physically separate the Al and Mg plasmas. Separate numerical simulations of the Al and Mg plasmas designed to guide exploratory experiments are reported. A 0D dynamic z-pinch model captures the Al implosion, including trapped Bz field and power losses due to line radiation. Initial conditions required to produce the intense Al xi pump line at 48.338 A(ring) are derived assuming an 800 kA, 100 ns implosion current pulse. Assuming a pinch length of 2 cm, a pump power of 3.5 GW/eV is predicted for the 48.338 A(ring) Al xi line. With the pump so defined, a separate, detailed atomic physics model is used to study the photoexcitation kinetics in the Mg ix lasant plasma. It is found that a gain of 1.0–1.5 cm−1 is obtainable on the 2s3d 1D2 - 2s4f 1F3 transition at 228 A(ring) in Mg ix.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.354394
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  • 7
    Electronic Resource
    Electronic Resource
    Should the controlled provision of heroin be a treatment option? Australian feasibility considerations (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Addiction 88 (1993), S. 0 
    Details
    ISSN: 1360-0443
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine , Psychology
    Notes: A proposal for a trial to provide heroin to dependent users in a controlled manner is currently being considered in the Australian Capital Territory. The political background to this proposal is outlined, as is the current ‘drug scene’. A Stage 1 examination found that a trial of controlled provision of heroin is feasible in principle and recommended a further stage (Stage 2) of feasibility investigations to explore the practicalities. The results of the Stage 1 investigations and the proposals for Stage 2 are incorporated into discussion about three important issues: the feasibility research process, the therapeutic relationship, and social control. These considerations have wider applicability, both for treatment services for illegal drug users generally and for informing drug policy debates. Much can be learnt from the feasibility considerations, whether or not a trial of the controlled provision of heroin eventuates in Australia.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1360-0443.1993.tb02053.x
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  • 8
    Electronic Resource
    Electronic Resource
    Properties of the lipid body lipase of Pinus eduUs and electrophoretic purification of its 64 kDa subunit (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Physiologia plantarum 87 (1993), S. 0 
    Details
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Lipase (triacyiglycerol acylhydrolase, EC 3.1.1.3) in oilseeds can be associated with either the lipid body or glyoxysomal membrane and can have various pH optima and substrate specificities. There is conflicting evidence for the subcellular location of lipase in gymnosperms, and little information exists on its activity characteristics. In this report, Pinus edulis (pinyon) was found to have an acid lipase, which was associated with the lipid body fraction and the activity of which increased during germination. Active lipase from the solubilized lipid body membrane was determined by gel permeation chromatography to have a molecular weight of 260 000. Further attempts to purify the active enzyme were unsuccessful. A lipid body membrane protein of 64 kDa which increased in parallel with lipase activity during germination was isolated by sodium dodecyl sulphate-polyacrylamide gel electrophoresis. excised, and polyclonal antibodies were made against it. Using these antibodies, active lipase was immunoprecipitated from solution, thus indicating that the 64 kDa protein is a subunit of the lipase. Pinus edulis lipase had a pH optimum of ca 4.5. and it exhibited little specificity for triacyiglycerol substrates in vitro. The lipase was specific in activity against fluorometric substrates, with the highest activity against methyl-umbelliferyl laurale. Lipase activity was inhibited by high concentrations of non-ionic detergent. This lipid body acid lipase appears to be primarily responsible for lipid hydrolysis during pinyon germination.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1399-3054.1993.tb08788.x
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  • 9
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    Dimensions of Local Union Effectiveness (1993)
    Ithaca, N.Y. : Periodicals Archive Online (PAO)
    Industrial and Labor Relations Review. 46:2 (1993:Jan.) 302 
    Details
    ISSN: 0019-7939
    Topics: Economics
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:3121-1993-046-02-000006
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  • 10
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    Unemployment and mental health among young people: a longitudinal study (1993)
    London : Periodicals Archive Online (PAO)
    Journal of adolescence. 16:4 (1993) 407 
    Details
    ISSN: 0140-1971
    Topics: Psychology
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:d137-1993-016-04-000005
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