Library

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
  • 1
    Electronic Resource
    Electronic Resource
    Subunit Regulation of the Human Brain α1E Calcium Channel (1997)
    Springer
    The journal of membrane biology 160 (1997), S. 127-140 
    Details
    ISSN: 1432-1424
    Keywords: Key words:Xenopus oocytes — Calcium channel —β subunit —α2δ subunit — Inactivation — Neuronal cells
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology
    Notes: Abstract. The α1 subunit coding for the human brain type E calcium channel (Schneider et al., 1994) was expressed in Xenopus oocytes in the absence, and in combination with auxiliary α2δ and β subunits. α1E channels directed with the expression of Ba2+ whole-cell currents that completely inactivated after a 2-sec membrane pulse. Coexpression of α1E with α2bδ shifted the peak current by +10 mV but had no significant effect on whole-cell current inactivation. Coexpression of α1E with β2a shifted the peak current relationship by −10 mV, and strongly reduced Ba2+ current inactivation. This slower rate of inactivation explains that a sizable fraction (40 ± 10%, n= 8) of the Ba2+ current failed to inactivate completely after a 5-sec prepulse. Coinjection with both the cardiac/brain β2a and the neuronal α2bδ subunits increased by ≈10-fold whole-cell Ba2+ currents although coinjection with either β2a or α2bδ alone failed to significantly increase α1E peak currents. Coexpression with β2a and α2bδ yielded Ba2+ currents with inactivation kinetics similar to the β2a induced currents, indicating that the neuronal α2bδ subunit has little effect on α1E inactivation kinetics. The subunit specificity of the changes in current properties were analyzed for all four β subunit genes. The slower inactivation was unique to α1E/β2a currents. Coexpression with β1a, β1b, β3, and β4, yielded faster-inactivating Ba2+ currents than currents recorded from the α1E subunit alone. Furthermore, α1E/α2bδ/β1a; α1E/α2bδ/β1b; α1E/α2bδ/β3; α1E/α2bδ/β4 channels elicited whole-cell currents with steady-state inactivation curves shifted in the hyperpolarized direction. The β subunit-induced changes in the properties of α1E channel were comparable to modulation effects reported for α1C and α1A channels with β3≈β1b 〉 β1a≈β4≫β2a inducing fastest to slowest rate of whole-cell inactivation.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002329900302
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    The relative extent of glycation of haemoglobin and albumin
    Amsterdam : Elsevier
    Clinica Chimica Acta 163 (1987), S. 125-136 
    Details
    ISSN: 0009-8981
    Keywords: Albumin ; Glycation ; Hemoglobin ; Non-enzymatic glycosylation
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0009-8981(87)90014-3
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Determination of glycosylated adult and foetal haemoglobins by affinity chromatography
    Amsterdam : Elsevier
    Clinica Chimica Acta 128 (1983), S. 61-67 
    Details
    ISSN: 0009-8981
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0009-8981(83)90055-4
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Isochronal annealing of local vibrational modes in proton- and deuteron-implanted InP (1993)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 73 (1993), S. 78-83 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We have performed isochronal annealing experiments on the hydrogen-related local vibrational modes (LVMs) created by proton and deuteron implantation of InP. Implanted samples were annealed in 50 °C increments in the 200–600 °C temperature range for 30 min each and then measured by infrared absorption. A group of four different LVMs is observed, each of which arises from the hydrogen-phosphorus stretching vibration with different defects or impurities at nearest-neighbor sites. Each LVM exhibits an annealing behavior that is different than any of the other LVMs. The annealing results are shown and discussed in relation to the possible microscopic structure of the defect responsible for each LVM.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.353832
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Ground and excited state exciton spectra from GaN grown by molecular-beam epitaxy (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 80 (1996), S. 594-596 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The emission and reflection spectra of GaN have been investigated in the intrinsic region and the data have been interpreted in terms of the wurtzite crystal band structure. Three intrinsic exciton transitions have been observed, one associated with each of the valence bands. Exciton excited states associated with the two top valence bands were also observed. The exciton binding energies, the band-gap energies, and the exciton Bohr radii are all reported along with the dielectric constant and the spin-orbit and crystal-field parameters for GaN. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.362724
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    New evidence of small lattice relaxation for the DX center in AlxGa1−xAs (1987)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 51 (1987), S. 1358-1360 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Local structure of isolated Si impurity in GaAs and AlAs is studied using a parameter-free semi-empirical tight binding method. It is predicted that nearest neighbor As atom around the impurity moves toward SiGa(Al) causing a 6.54% (5.73%) change in GaAs(AlAs) bond length. An estimation of lattice distortion energy 0.02±0.003 eV (0.025±0.003 eV) for GaAs:Si (AlAs:Si) is found in good qualitative agreement with the value obtained by J. C. M. Henning and J. P. M. Ansems [Semicond. Sci. Technol. 2, 1 (1987)] from the photoionization of the DX center in lightly doped Si impurities in Al0.33Ga0.67As. The fits for the observed maxima in the optical cross section and the calculation of the pressure-dependent thermal barrier energy lend support for the small lattice relaxation models and cast doubt on the validity of those with the large lattice relaxation usually recommended for this class of centers.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.98678
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Lattice dynamics of II-VI based diluted magnetic semiconductors (1990)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 68 (1990), S. 4332-4334 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The results of far infrared reflectivity and Raman scattering spectra reported recently in Hg1−xMnxTe samples with low composition of Mn impurities are analyzed theoretically. The Kramers–Kronig analysis in the spectral range (50–350 cm−1 ) is employed to obtain the proper energetic positions of the two optical phonons and a weak peak near ∼98 cm−1 (above the longitudinal acoustic-phonon band of HgTe). Simple schemes, based on the so called "oscillator fit'' and modified random element isodisplacement models, are chosen with appropriate values of transition energies and strengths to reproduce the observed reflectivity spectra. A comprehensive calculation of the lattice dynamics in terms of semi-empirical Green's function theory has provided convincing arguments that the feature near 98 cm−1 is a gap mode of Mn in HgTe.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.346206
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    High-resolution infrared absorption measurements of Al-doped ZnSe (1985)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 58 (1985), S. 2553-2558 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Infrared absorption measurements of localized vibrational modes (LVM) due to Al in ZnSe performed under high-resolution conditions reveal additional features as compared to previous data. The cluster of bands near 340 cm−1 is resolved into at least six and possibly eight individual absorptions. A Green's function calculation over various pertinent models best explains most of these LVM as probably arising from a (2 AlZn-ZnSe) antisite complex (or at least an AlZn pair) with other complexes less likely. The linewidth of individual features can be explained in terms of nearest-neighbor Se host lattice isotopes. Finally, features perturbed from the isolated AlZn case are considered as well as the remaining LVM of unknown origin.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.335935
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Phonon excitations and thermodynamic properties of cubic III nitrides (2002)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 80 (2002), S. 1553-1555 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A comprehensive study of phonon excitation and thermodynamic properties of cubic GaN and AlN is reported using a rigid-ion model (RIM) in the quasiharmonic approximation. The data on elastic constants and phonon modes at critical points at ambient and high pressures have allowed us to optimize RIM parameters to obtain accurate values of phonon dispersions, one-phonon density of states, mode Grüneisen parameters γ(q), specific heat Cv(T), and thermal expansion α(T) coefficients. Despite the small softening of TA modes in GaN and AlN, the variations of thermal expansion coefficients are seen much like that of Cv(T), and unlike other III–V compounds it exhibits no negative values at lower temperatures. © 2002 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1456545
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Thermal expansion coefficient of 3C–SiC (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 67 (1995), S. 3301-3303 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Theoretical results for the temperature dependence of the thermal expansion coefficient for 3C–SiC are reported using a phenomenological lattice dynamical theory in the quasiharmonic approximation. The linear thermal expansion coefficient α of 3C–SiC exhibits a variation with temperature much like that of the specific heat and, unlike other tetrahedrally coordinated materials, it does not attain a negative value at lower temperatures. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.115227
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...