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  • Springer  (5,593)
  • American Institute of Physics (AIP)  (673)
  • 1
    Electronic Resource
    Electronic Resource
    Photodissociation of Br2 at 234 and 265 nm: Imaging studies of one and two photon excitation (2001)
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 115 (2001), S. 9739-9746 
    Details
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The photodissociation of Br2 at 234 and 265 nm was investigated using a velocity map imaging technique via one- and two-photon excitation. The speed and angular distributions of the bromine ions obtained via one-photon excitation following state selective ionization reveal a unique transition to the 1441 3Σu+(1u) state. This state dissociates further into Br(4p 2P3/2)+Br(4p 2P1/2) at 234 nm, and into Br(4p 2P3/2)+Br(4p 2P1/2) and Br(4p 2P3/2)+Br(4p 2P3/2) at 265 nm, with relative quantum yields of Φ(Br(4p 2P3/2)+Br(4p 2P1/2))=0.96 and Φ(Br(4p 2P3/2)+Br(4p 2P3/2))=0.04. The proportionality constant k, related to the relative [2+1] REMPI strengths of atomic bromine (Br 2P1/2/Br 2P3/2) was determined to be 0.42±0.02 for Br(4p 2P1/2) detected at 234.0 nm and for Br(4p 2P3/2) at 233.7 nm, and 0.73±0.02 for Br 2P1/2/Br 2P3/2 at 264.9 nm to detect Br(4p 2P1/2) and 264.8 nm to detect Br(4p 2P3/2). Image analysis of the ions and photoelectrons obtained by two-photon excitation at various wavelengths in the range of 229.4–237.6 nm shows that some fragmented bromine atoms are in highly excited Br(5s 4PJ:J=5/2, 3/2, 1/2) states, and that there exists superexcited Rydberg states converging to the asymptotes, Br(4p 2P)+Br(5s 4P) near the ionization threshold. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1410977
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  • 2
    Electronic Resource
    Electronic Resource
    Production of biologically active human granulocyte colony stimulating factor in the milk of transgenic goat (2000)
    Springer
    Transgenic research 9 (2000), S. 215-222 
    Details
    ISSN: 1573-9368
    Keywords: biological activity ; bioreactor ; G-CSF ; O-glycosylation ; transgenic goat
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract We have developed a transgenic female goat harboring goat beta-casein promoter/human granulocyte colony stimulating factor (G-CSF) fusion gene by microinjection into fertilized one-cell goat zygotes. Human G-CSF was produced at levels of up to 50 μ g/ml in transgenic goat milk. Its biological activity was equivalent to recombinant human G-CSF expressed from Chinese hamster ovary (CHO) cell when assayed using in vitro HL-60 cell proliferation. Human G-CSF from transgenic goat milk increased the total number of white blood cells in C57BL/6N mice with leucopenia induced by cyclophosphamide (CPA). The secreted human G-CSF was glycosylated although the degree of O-glycosylation was lower compared to CHO cell-derived human G-CSF.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008972010351
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  • 3
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    Inactivation of HDAC3 and STAT3 is Critically Involved in 1-Stearoyl-sn-Glycero-3-Phosphocholine-Induced Apoptosis in Chronic Myelogenous Leukemia K562 Cells (2013)
    Springer
    Details
    Publication Date: 2013-06-02
    Print ISSN: 1085-9195
    Electronic ISSN: 1559-0283
    Topics: Biology , Medicine
    Published by Springer
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    PAPER CURRENT
  • 4
    Electronic Resource
    Electronic Resource
    Atomic transport in thermal spike induced ion mixing (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 4292-4296 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A simple relationship between the ratio of atomic transport induced by ion mixing and the activation energies for the impurity diffusion of constituents in a bilayer is presented to describe quantitatively the symmetric and asymmetric atomic transport in the thermal spike induced ion mixing. The model predicts fairly satisfactorily the trend of experimental observations in the bilayer systems which have near zero heats of mixing and relatively high spike activation energies. For instance, the Pd/Co bilayer system shows nearly symmetric atomic transport, since its constituents have similar activation energies for the impurity diffusion.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.352811
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  • 5
    Electronic Resource
    Electronic Resource
    Boron penetration and thermal instability of p+ polycrystalline-Si/ZrO2/SiO2/n-Si metal-oxide-semiconductor structures (2002)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 91 (2002), S. 65-68 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report boron penetration and thermal instability of p+ polycrystalline-Si (poly-Si)/ZrO2 (100 Å)/SiO2 (∼7 Å)/n-Si metal-oxide-semiconductor (MOS) structures. The flatband voltage shift (ΔVFB) of the p+ poly-Si/ZrO2/SiO2/n-Si MOS capacitor as determined by capacitance–voltage measurement was ∼0.18 V, corresponding to a p-type dopant level of 1.1×1012 B ions/cm2 as the activation temperature increased from 800 to 850 °C. Additional ΔVFB of ∼0.24 V was measured after the anneal from 850 to 900 °C. Noticeable boron penetration into the n-type Si channel as observed by secondary ion mass spectroscopy also confirmed the VFB instability with activation annealing above 850 °C. An abnormal decrease of accumulation capacitance was also found after anneal at 900 °C due to an excessive leakage current which was attributed to the formation of ZrSix nodules at the poly-Si/ZrO2 interface. We observed 4–5 orders of magnitude lower leakage current from the small-size capacitors (〈50×50 μm2) up to the activation anneal of 850 °C for 30 min, while the formation of interfacial ZrSix nodules at 900 °C cannot be avoidable even at 0.6-μm-wide gate lines. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1419207
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  • 6
    Electronic Resource
    Electronic Resource
    Electron capture in the Lorentzian distribution plasma (1999)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 6 (1999), S. 3674-3677 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Electron captures from hydrogenic ions by protons in a generalized Lorentzian (kappa) velocity distribution plasma are investigated using the semiclassical Bohr–Lindhard model. The potential energy between the projectile ion and the released electron is obtained by introduction of the plasma dielectric function. The straight-line trajectory approximation is applied to the motion of the projectile ion in order to obtain the electron capture probability as a function of impact parameter, collision energy, and spectral index κ. It is found that the semiclassical capture probability including the dynamic plasma screening effect is increased with increasing the spectral index. The plasma screening effects on the electron capture probabilities are found to be more effective for low projectile velocities. It is also found that the dynamic plasma screening effect on the electron capture probability in the Lorentzian distribution plasma is stronger than that in the Maxwellian distribution plasma since the effective Debye length in the Lorentzian plasma is smaller than the Debye length in the Maxwellian plasma. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.873625
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  • 7
    Electronic Resource
    Electronic Resource
    Dynamic plasma screening effects on electron-ion Coulomb bremsstrahlung in the Lorentzian distribution plasma (1999)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 6 (1999), S. 1627-1630 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Dynamic plasma screening effects are investigated on classical bremsstrahlung electron-ion Coulomb scattering in a generalization Lorentzian (kappa) velocity distribution plasma. The electron-ion interaction potential is obtained by introduction of the plasma dielectric function. A semiclassical straight-line trajectory method is applied to the path of the projectile electron. The results show that the differential bremsstrahlung radiation cross section including the dynamic plasma screening effect is increased as an increase of the spectral index κ. In other words, the radiation spectrum in a thermal distribution plasma is found to be stronger than that in the nonthermal distribution plasma. It is also found that the plasma screening effects on the bremsstrahlung are more effective for the hard photon radiation. When the projectile velocity is greater than the electron thermal velocity, then, the interaction potential is almost unshielded. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.873416
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  • 8
    Electronic Resource
    Electronic Resource
    Dynamic plasma screening effects on electron–ion collisional excitations in a generalized Lorenzian (kappa) distribution plasma (1998)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 5 (1998), S. 2480-2484 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Dynamic plasma screening effects are investigated on 1s→2p dipole transition probabilities for electron-impact excitation of hydrogenic ions in a generalized Lorenzian (kappa) velocity distribution plasmas. The electron–ion interaction potential is obtained by introduction of the plasma dielectric function. A semiclassical straight-line trajectory method is applied to the path of the projectile electron in order to visualize the dynamic plasma screening effects on the semiclassical transition probabilities as a function of the impact parameter and the collision energy. The transition probability including the dynamic plasma screening effect is found to be always greater than that including the static plasma screening effects. It is also found that the dynamic plasma screening effects on the electron–ion collisional excitations in the Lorenzian velocity distribution plasmas are more effective than those in the Maxwellian velocity distribution plasmas. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872930
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  • 9
    Electronic Resource
    Electronic Resource
    Dynamic screening effects on antiscreening excitations for ion–ion collisions in dense plasma (1998)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 5 (1998), S. 889-894 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: In dense plasmas, dynamic plasma screening effects are investigated on antiscreening channels for excitation of a one-electron ion target by a one-electron ion projectile. The ion–ion interaction potential is considered by the introduction of the longitudinal plasma dielectric function. A semiclassical straight-line trajectory method is applied to the ion projectile path in order to visualize the dynamic plasma screening effects on the transition probabilities in dense plasmas as a function of the impact parameter and the collision energy. The transition probabilities including the dynamic plasma screening effects are found to always be greater than those including the static plasma screening effects. When the projectile velocity is greater than the electron thermal velocity, the interaction potential is almost unshielded. The difference between the dynamic and static plasma screening effects is more significant for low-energy projectiles. It is also found that the quadrupole transitions (dipole-quadrupole and quadrupole–quadrupole) show the double peaks due to the node of the 2s radial wave function. © 1998 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.872656
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  • 10
    Electronic Resource
    Electronic Resource
    Spherical versus nonspherical plasma-screening effects on semiclassical electron–ion collisional excitations in weakly coupled plasmas (1996)
    [S.l.] : American Institute of Physics (AIP)
    Physics of Plasmas 3 (1996), S. 3291-3296 
    Details
    ISSN: 1089-7674
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Spherical and nonspherical plasma-screening effects are investigated on electron-impact excitation of hydrogenic ions in weakly coupled plasmas. Semiclassical straight-line trajectory method is used to describe the behavior of the projectile electron. Scaled 1s→2p−1 semiclassical excitation probabilities are obtained by the spherical and nonspherical Debye–Hückel interaction potentials. The plasma-screening effect of the bound atomic wave functions in the transition probability obtained by the spherical Debye–Hückel model is found to be more effective than that in the transition probability obtained by the nonspherical Debye–Hückel model. The maximum position of the transition probability obtained by the nonspherical Debye–Hückel potential is more receded from the nucleus than that of transition probability obtained by the spherical Debye–Hückel potential. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.871596
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