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  • 1
    Electronic Resource
    Electronic Resource
    A high-temperature pulsed supersonic nozzle (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 3020-3021 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A pulsed supersonic nozzle is presented which can be heated to 1300 K and cooled to 4 K. The whole system is composed of quartz to prevent the decomposition of the molecules at a high temperature. The nozzle has produced gas pulses at a rate of 10 Hz and pulse lengths of 5 ms. The performance of the system is demonstrated by the flight time and the rotational temperature of NO molecules as a function of the stagnation pressure and the nozzle temperature.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144351
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  • 2
    Electronic Resource
    Electronic Resource
    New vapor phase spontaneous Raman spectrometer (1992)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 63 (1992), S. 3280-3284 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A highly sensitive, spontaneous Raman spectrometer designed for the study of vapors and other low-density samples is discussed. The high sensitivity is achieved by means of the novel combination of a multipass light cell and a high-temperature gasdynamic focusing system. A complete description of the apparatus is given, along with the results of a sensitivity test in ambient air, as well as results demonstrating gasdynamic focusing of a vapor and Raman transitions in such a sample.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1142537
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  • 3
    Electronic Resource
    Electronic Resource
    A pulsed supersonic molecular beam with high rotational temperatures (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 407-411 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: The construction and operation of a novel high temperature pulsed quartz nozzle employed for the generation of rotationally excited supersonic molecular beams are reported herein. At high stagnation pressures ((approximately-greater-than) 1 bar) the NO molecules in the beam pulse exhibit a translational and rotational behavior identical to heated continuous nozzles (Trot〈50 K; Ekin≈7/2 kTN). At reduced stagnation pressures (10 mbar–1 bar) the rotational temperatures of the beam molecules are increased substantially (up to Trot≈700 K) accompanied by a translational behavior, which can be characterized by a small Mach number. The design has produced the rotationally hottest supersonic beam ever prepared in the pulsed mode.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1145147
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Structure of zinc phthalocyanine by gas phase electron diffraction (1993)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 99 (1993), S. 6416-6420 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Gas phase electron diffraction data have been successfully recorded for zinc phthalocyanine. Molecular structure parameters have been determined by least square fitting a geometrically consistent model of C4v symmetry to the data. The results agree well with previous x-ray diffraction studies of crystals. However, the zinc atom was found to be slightly out the plane of the molecule in contrast with the x-ray results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.465880
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  • 5
    Electronic Resource
    Electronic Resource
    Molecular bonding in SF6 measured by elastic electron scattering (1992)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 97 (1992), S. 8197-8200 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: Elastic differential cross-section measurements of gaseous SF6 were made with 30 keV electrons in the range of 0.25 bohrs−1≤s≤10 bohrs−1. Structural parameters derived in this study closely matched those found in an earlier total (elastic plus inelastic) scattering investigation. Multiple-scattering effects were incorporated in the structural refinement. The discrepancies between the independent atom model and the measured differential cross section reproduce earlier total scattering results for momentum transfers of greater than 5 bohrs−1. By extending the measurements to smaller s values, a closer examination of a Hartree–Fock calculation for SF6 was possible. It was found that the difference curve obtained from the Hartree–Fock calculation matched the experimental data in this region. A more quantitative analysis was performed using the analytic expressions of Bonham and Fink to compute moments of the molecular charge distribution from the differential cross-section data. Comparison of these results with similar fits to the Hartree–Fock calculation confirmed the good agreement between the Hartree–Fock calculation and the current elastic data.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.463442
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  • 6
    Electronic Resource
    Electronic Resource
    Optical probing of pulsed, focused ultrasonic fields using a heterodyne interferometer (1992)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 61 (1992), S. 153-155 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The pulsed acoustic field of a piezoelectric focused transducer transmitted in water has been investigated by using an optical heterodyne interferometer. The probe beam is reflected by a thin membrane that follows the motion of the fluid particle. Absolute measurements of the mechanical displacement have been performed in the frequency range 5–15 MHz with a spatial resolution better than 0.1 mm and a sensitivity of 0.1 nm with a 20 MHz detection bandwidth that corresponds to a minimum detectable acoustic energy density of 2 μJ/m2. The experimental results all agree quantitatively with diffraction theory predictions of impulse response at the focus of the transducer.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.108202
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  • 7
    Electronic Resource
    Electronic Resource
    Transient elastic wave generation by an array of thermoelastic sources (1993)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 63 (1993), S. 3276-3278 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A set of 16 thermoelastic strip sources, equivalent to a phased array of ultrasonic transducers has been implemented on a solid by irradiating its surface with a multiple beam pulsed YAG laser. Longitudinal elastic waves were focused in the sample by time delaying each laser pulse. Results of experiments performed on duraluminum in the thermoelastic regime are presented and compared with simulations based on the surface center of the expansion model. It is shown that with this technique, a high energy focusing, together with an ultrasonic beam scanning can be achieved in a wide angular range leading to a significant improvement in the signal-to-noise ratio of a laser based ultrasonic system.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.110173
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  • 8
    Electronic Resource
    Electronic Resource
    Structure of a highly crowded linear trisilane (1991)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 47 (1991), S. 126-129 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270190004541
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  • 9
    Electronic Resource
    Electronic Resource
    Structure of cis-[1,2-bis(dicyclohexylphosphino)ethane-P,P']dichloroplatinum(II) chloroform solvate (1993)
    Oxford [u.a.] : International Union of Crystallography (IUCr)
    Acta crystallographica 49 (1993), S. 1176-1178 
    Details
    ISSN: 1600-5759
    Source: Crystallography Journals Online : IUCR Backfile Archive 1948-2001
    Topics: Chemistry and Pharmacology , Geosciences , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1107/S0108270192011697
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    Paper (German National Licenses)
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  • 10
    Electronic Resource
    Electronic Resource
    Possible effect of medroxyprogesterone acetate (MPA) in lymphoid blast crisis of chronic myelogenous leukemia (1994)
    Springer
    Annals of hematology 68 (1994), S. 89-90 
    Details
    ISSN: 1432-0584
    Keywords: Chronic myelogenous leukemia Lymphoid blast crisis ; Medroxyprogesterone acetate
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary A patient with a lymphoid blast crisis of a chronic myelogenous leukemia (CML) was treated with vindesine, vincristine and prednisone. Blasts disappeared from the peripheral blood but persisted at a level of 60% in the bone marrow. After 5 weeks of continuous therapy, the patient became thrombopenic, and 2 weeks later blasts rose to 31%. After 7 weeks, 1 g MPA was given daily p.o. and weekly vincristine treatment was resumed. Blasts disappeared again from the peripheral blood, thrombocytes rose to a maximum of 274 g/l, and a remission with less than 5% blasts was demonstrated in the bone marrow. In another relapse after withdrawal of MPA, estrogen and progesterone receptors (PR) were found in the leukemic cells. Thus, a remission was seen during treatment with vincristine, prednisone, and MPA after a deterioration with vincristine and prednisone alone in a PR-positive leukemia, and an effect of MPA in this lymphoid blast crisis of a CML has to be discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01715138
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