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  • 1
    Electronic Resource
    Electronic Resource
    Photoacoustic cell for routine analysis (1994)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 65 (1994), S. 2155-2156 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A photoacoustic cell was designed for routine studies (e.g., samples adsorbed on filter paper). Teflon disks that are easily cleaned and removed are used as the sample holders. The cell was characterized by recording the photoacoustic waveform with a digital oscilloscope.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144719
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  • 2
    Electronic Resource
    Electronic Resource
    A simple internally mixed photomultiplier with GHz response (1993)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 64 (1993), S. 3014-3017 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A small head-on photomultiplier (HR2247) with "half photocathode gating'' is being used for detection in a superheterodyne mixing scheme. The HR2247 has a spectral range of 160–650 nm, a frequency response to 1 GHz and is inexpensive. A gate mesh covers part of the photocathode surface. Internal mixing is accomplished by applying a rf signal to the gate mesh. A fiber-optic/objective assembly mounted on an X-Y stage scans the position of the incident laser beam on the mesh. In order to evaluate the suitability of the HR2247 for practical fluorescence and imaging experiments, the photocathode surface was mapped at 41, 205, 410, 615, and 820 MHz modulation frequencies for variations in phase and modulation. The mixed signal at any point on the gate mesh can be optimized by adjusting the potential at the gate mesh.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1144349
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  • 3
    Electronic Resource
    Electronic Resource
    Infant cortisol response after prolonged antenatal prednisolone treatment (2004)
    Oxford, UK and Malden, USA : Blackwell Science Ltd
    BJOG 111 (2004), S. 0 
    Details
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Prednisolone is widely used to treat medical conditions in pregnancy, despite the lack of long term safety studies on infants. Animal studies have shown that antenatal glucocorticoid treatment can cause in utero growth restriction and up-regulation of the offsprings' hypathalamic–pituitary–adrenal axis. We recruited women treated antenatally with prednisolone, and followed 12 of the infants up to four months, using routine infant vaccinations as a stressor. Birthweights were similar to controls (n= 289, uncomplicated, singleton term pregnancies), as were infants' baseline and stress-induced cortisol levels. Mothers rated their infants as less difficult and more adaptable than controls. This study provides initial reassurance about the safety of prednisolone in pregnancy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-0528.2004.00288.x
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  • 4
    Electronic Resource
    Electronic Resource
    Vortext Dynamics in the Cylinder Wake (1996)
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Fluid Mechanics 28 (1996), S. 477-539 
    Details
    ISSN: 0066-4189
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1146/annurev.fl.28.010196.002401
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  • 5
    Electronic Resource
    Electronic Resource
    Geometry Effects on the Concentration and Reaction Rate Profile in Methanol Production Catalyst. 1. Neglecting External Diffusion (1994)
    s.l. : American Chemical Society
    Industrial & engineering chemistry research 33 (1994), S. 2029-2033 
    Details
    ISSN: 1520-5045
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Process Engineering, Biotechnology, Nutrition Technology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ie00033a002
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  • 6
    Electronic Resource
    Electronic Resource
    Improved Synthesis of (−)-Carbovir, GR90352X, a Potent and Selective Inhibitor of HIV-1 in Vitro (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 616 (1990), S. 0 
    Details
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1749-6632.1990.tb17886.x
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  • 7
    Electronic Resource
    Electronic Resource
    Wave interactions in the far wake of a body (1993)
    New York, NY : American Institute of Physics (AIP)
    Physics of Fluids 5 (1993), S. 1854-1856 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: There has been some question recently as to whether the far-wake structure of a bluff body is dependent on, or "connected'' with, the precise details of the near-wake structure. Indeed, it has previously been assumed that there is no direct connection in scale or frequency. In the present work, observations are shown of a honeycomb-like 3-D pattern in the far wake, which is caused by an interaction between the decaying oblique shedding waves from upstream and large-scale 2-D waves in the far wake. A clear "connection'' between the 3-D scales of the near and far wakes is thereby demonstrated. The symmetry and spanwise wavelength of Cimbala et al.'s [J. Fluid Mech. 190, 265 (1988)] 3-D pattern are precisely consistent with such wave interactions. In the presence of parallel shedding, the lack of a honeycomb pattern shows that the pattern is clearly dependent on oblique vortex shedding. It also follows that for oblique shedding, the far-wake 2-D waves cannot possibly be the result of vortex pairing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.858810
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  • 8
    Electronic Resource
    Electronic Resource
    Defining a universal and continuous Strouhal–Reynolds number relationship for the laminar vortex shedding of a circular cylinder (1988)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 31 (1988), S. 2742-2744 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The existence of a discontinuity in the Strouhal–Reynolds number relationship for the laminar vortex shedding of a cylinder is found to be caused by a change in the mode of oblique shedding. By "inducing'' parallel shedding (from manipulating end conditions) the resulting Strouhal curve becomes completely continuous and agrees very well with the oblique-shedding data, if it is transformed by S0=Sθ/cos θ (where Sθ is the Strouhal number corresponding with the oblique-shedding angle θ). The curve also agrees with data from a completely different facility. This provides evidence that this Strouhal curve (S0) is universal (for a circular cylinder).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.866978
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  • 9
    Electronic Resource
    Electronic Resource
    The existence of two stages in the transition to three-dimensionality of a cylinder wake (1988)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 31 (1988), S. 3165-3168 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The transition to three-dimensionality in the near wake of a circular cylinder involves two successive transitions, each of which corresponds with a discontinuity in the Strouhal–Reynolds number relationship. The first discontinuity [between Reynolds numbers (Re) of 170 to 180] is associated with the inception of vortex loops, and it is hysteretic. The second discontinuity (between Re=230 to 260) corresponds with a change to a finer-scale streamwise vortex structure. At this discontinuity there is no hysteresis, and it is suggested that two modes of vortex shedding alternate in time.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.866925
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  • 10
    Electronic Resource
    Electronic Resource
    Mode A secondary instability in wake transition (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 8 (1996), S. 1680-1682 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: It is now well known that the wake transition regime for a circular cylinder involves two modes of secondary three-dimensional instability (modes "A'' and "B''), depending on the regime of Reynolds number (Re). However, there exists a surprisingly large scatter in previous measurements of critical Re for the inception of the mode A instability (Re from 140 to 190) and in previous measurements of spanwise length scale. It is deduced in this work that the large variation in previous measurements concerning mode A are due to the presence of vortex dislocations. In the absence of such dislocations, we find an excellent agreement of the critical Re as well as spanwise wavelength of mode A with the linear secondary stability analysis of Henderson and Barkley [Phys. Fluids 8, 1683 (1996)]. We further demonstrate that these large-scale dislocations in wake transition are triggered at the sites of some of the vortex loops for mode A; they are an intrinsic feature of transition, independent of end conditions. These studies lead us to a new clarification of the possible flow states through wake transition, as follows. If one defines a Mode A* as (Mode A+Dislocations), then the route through transition appears to follow the scenario of wake modes: (2D→A→A*→B). © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.868949
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