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  • 1995-1999  (29)
  • 1985-1989  (18)
  • 1975-1979  (15)
  • 1970-1974  (10)
  • 1
    Electronic Resource
    Electronic Resource
    Chemically etched micromirrors in silicon (1988)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 52 (1988), S. 836-837 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Purposely introduced pinholes can be processed so as to produce nearly spherical or paraboloidal depressions in (100) silicon by a two-step chemical etching procedure in KOH:water solutions. Regular arrays of f/1–f/10 specularly reflecting micromirrors can be fabricated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.99300
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  • 2
    Electronic Resource
    Electronic Resource
    AROMATIC AMINOTRANSFERASE ACTIVITY OF RAT BRAIN CYTOPLASMIC AND MITOCHONDRIAL ASPARTATE AMINOTRANSFERASES (1978)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of neurochemistry 30 (1978), S. 0 
    Details
    ISSN: 1471-4159
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Abstract— Mitochondrial and cytoplasmic forms of aspartate aminotransferase were purified from rat brain homogenates and tested for their ability to catalyze transamination of various aromatic amino acids. The mitochondrial enzyme exhibited activity toward tyrosine and phenylalanine with 2-oxoglutar-ate as acceptor, although the specific activities were less than 1% of the corresponding aspartate activity when all substrates were 10 mM. Even less activity was seen with DOPA, 5-hydroxytryptophan and tryptophan. The cytoplasmic aspartate aminotransferase was active toward tryptophan, 5-hydroxytryptophan and DOPA, but these transaminations were favored by pyruvate or oxaloacetate rather than 2-oxoglutarate as keto acid. Based on co-migration of aromatic activities with the respective aspartate aminotransferases during isoelectric focusing and based on equal sensitivities of aromatic transamination and aspartate transamination to inhibition by vinylglycine, it was concluded that all activities resided in the aspartate aminotransferase enzymes. Some doubt exists, however, as to the physiological significance of these alternate activities in view of the requirement that aromatic amino acids must compete with aspartate for transamination by these enzymes.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1471-4159.1978.tb10472.x
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  • 3
    Electronic Resource
    Electronic Resource
    The quartic anharmonic oscillator and its associated nonconstant magnetic field (1997)
    College Park, Md. : American Institute of Physics (AIP)
    Journal of Mathematical Physics 38 (1997), S. 4887-4899 
    Details
    ISSN: 1089-7658
    Source: AIP Digital Archive
    Topics: Mathematics , Physics
    Notes: Quantum mechanical anharmonic oscillators and Hamiltonians for particles in external magnetic fields are related to representations of nilpotent groups. Using this connection the eigenfunctions of the quartic anharmonic oscillator with potential Vα(x)=(α+(x2/2))2 can be used to determine the eigenfunctions of a charged particle in a nonconstant magnetic field, of the form Bz=β2+β3x. The quartic anharmonic oscillator eigenvalues for low-lying states are obtained numerically and a function which interpolates between α(very-much-less-than)0 (a double harmonic oscillator) and α(very-much-greater-than)0 (a harmonic oscillator) is shown to give a good fit to the numerical data. Approximate expressions for the quartic anharmonic oscillator eigenfunctions are then used to get the eigenfunctions for the magnetic field Hamiltonian. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.531924
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  • 4
    Electronic Resource
    Electronic Resource
    Institutional roles in technology transfer: a diagnosis of the situation in one small country (1973)
    Oxford, UK : Blackwell Publishing Ltd
    R & D management 4 (1973), S. 0 
    Details
    ISSN: 1467-9310
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Economics
    Notes: The findings of this survey indicate that in fostering international transfer of technology much can be done to influence the development of inter-personal and inter-organizational contacts. This is not in itself a complete answer to international technology transfer, but this study suggests that it is an important, though much neglected area, which should be a central concern in science policy.A survey was conducted in 1970 and 1971 of the communication patterns of more than 1,200 research and development scientists and engineers working in Ireland. Techniques previously used in studying individual firms were adapted to suit the conditions within the country.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1467-9310.1973.tb01030.x
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  • 5
    Electronic Resource
    Electronic Resource
    FRACTALS AND THE RIVER-LENGTH CATCHMENT-AREA RATIO (1988)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of the American Water Resources Association 24 (1988), S. 0 
    Details
    ISSN: 1752-1688
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Architecture, Civil Engineering, Surveying , Geography
    Notes: : The fractal nature of stream-length and catchment-area measurement is investigated using eight rivers in Missouri. The fractal dimension for the length measurement was found to average 1.158 and for area to average 1.0105. These values are close to those hypothesized by Mandeibrot (1983).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1752-1688.1988.tb03005.x
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  • 6
    Electronic Resource
    Electronic Resource
    Ship waves on a viscous fluid of finite depth (1997)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 9 (1997), S. 940-944 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In this paper we are concerned with the wave generation by a singular forcelet in a viscous fluid of finite depth, where the singularity is located far from the bottom and not very near the free surface. In the first part of this work, the image system of an Oseenlet bounded by a no-slip wall, is considered. It is found that the resultant velocity field can be described by a planar distribution of vertical Oseen doublets and a negative Oseenlet located at the mirror point of the singularity with respect to the plane wall. In the second part of the work we deal with the generation of waves by these solutions. By imposing the linearized free-surface conditions on the solutions obtained from the first part, the wave generated is shown to exhibit the Kelvin ship wave pattern that agrees with observation. The effects of water depth and of submergence on the wave amplitude are also investigated. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.869189
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  • 7
    Electronic Resource
    Electronic Resource
    Interaction of laminar far wake with a free surface (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 8 (1996), S. 421-429 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Wave disturbances caused by the uniform translatory motion of a submerged body on or beneath the free surface of a viscous fluid are investigated analytically. The submerged body is idealized as an Oseenlet or an Oseen doublet, and exact solutions in closed integral forms are obtained. Based on these exact solutions, asymptotic representations of the wave amplitude for large Reynolds numbers based on the deep-water wavelength at large distances downstream of the body are derived. The results obtained show explicitly the effect of the laminar wake on the amplitude and the phase of the surface waves thus created. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.868796
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  • 8
    Electronic Resource
    Electronic Resource
    Numerical study of nonlinear shallow water waves produced by a submerged moving disturbance in viscous flow (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Fluids 8 (1996), S. 147-155 
    Details
    ISSN: 1089-7666
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Two-dimensional solitary waves generated by a submerged body moving near the critical speed in a shallow water channel are studied numerically. The incompressible Navier–Stokes equations in a curvilinear free-surface-fitted coordinate system are solved by the finite difference method. The present numerical results are compared with the existing experimental data, and with the numerical solutions of two inviscid-flow models, i.e. the general Boussinesq equation and the forced Korteweg-de Vries equation. It is found that the viscous effect in the boundary layer around the body and on the bottom of the channel plays an important role in the generation of solitary waves on the free surface. Hence the Navier–Stokes solutions have a better agreement with the experimental data than those obtained from two inviscid-flow models. The effect of the submergence depth of the body on the waves generated is also investigated. It reveals that waves are insensitive to the submergence depth of the body, except for a small region quite close to the bottom of the water channel. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.868822
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  • 9
    Electronic Resource
    Electronic Resource
    Synthesis of Enantiomerically Pure Stereogenically Labile 4-Aryl-2-hydroxytetronic Acids from Enantiomerically Pure Silyl-Protected Mandelaldehydes: aci-Reductone Analogs of Propionic Acid Nonsteroidal Anti-inflammatory Agents (1995)
    s.l. : American Chemical Society
    The @journal of organic chemistry 60 (1995), S. 3334-3341 
    Details
    ISSN: 1520-6904
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/jo00116a015
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  • 10
    Electronic Resource
    Electronic Resource
    Presence and quantity of dehydroalanine in histidine ammonia-lyase from Pseudomonas putida (1985)
    s.l. : American Chemical Society
    Biochemistry 24 (1985), S. 301-308 
    Details
    ISSN: 1520-4995
    Source: ACS Legacy Archives
    Topics: Biology , Chemistry and Pharmacology
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/bi00323a010
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