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
    Purification and characterization of alanine aminotransferase from Panicum miliaceum leaves
    Amsterdam : Elsevier
    Archives of Biochemistry and Biophysics 289 (1991), S. 262-266 
    Details
    ISSN: 0003-9861
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology , Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1016/0003-9861(91)90470-4
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Fractional quantum Hall effect in multilayer electron systems
    Amsterdam : Elsevier
    Physica B: Physics of Condensed Matter 184 (1993), S. 43-50 
    Details
    ISSN: 0921-4526
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0921-4526(93)90319-2
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Magnetic field homogeneity correction algorithm using pseudoinversion formula for NMR imaging (1986)
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 57 (1986), S. 683-688 
    Details
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: A systematic approach to passive shimming is proposed, and has been tested experimentally using a simultaneous gradient cancellation technique. In finding coil adjustments to correct gradients, the iterative application of the pseudoinverse (or generalized inverse) technique is used and a solution provided at each step. Each solution consists of a set of optimum values of adjustments. If the degree of freedom for adjustments is larger than the number of gradients to be corrected, the solution is the minimum norm solution. Through computer simulations, the algorithm is found to converge to a magnetic field homogeneous enough to allow nuclear-magnetic-resonance (NMR) imaging in only a few steps even in the presence of internal imperfections and misalignments as large as several 10 mm and an external asymmetric field affecting materials as near as a few meters. High homogeneity as well as fast convergence to a uniform magnetic field has been confirmed experimentally with the KAIS 1.5-kG magnet. By use of the proposed algorithm, we have experimentally obtained a field homogeneity of a 1.5-kG resistive magnet twice as homogeneous as that of the specified value with only a few iterations. Although it has been tested in the available low magnetic field, there are no restrictions in applying the technique to various magnets including superconductive magnets widely used in NMR imaging (in this case the algorithm is applied at the assembly stage).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1138890
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    High quality electron system with variable electron layer thickness in a parabolic quantum well (1989)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 55 (1989), S. 1430-1432 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We report the realization of a high quality electron system with variable areal density (ns ) in a selectively doped, parabolic Ax Ga1−x As well. For each ns, quantum oscillations in the magnetoresistance are analyzed to obtain the electron densities of the electric subbands. These densities are in good agreement with the predictions of self-consistent calculations of the subband structure. The data reveal that with increasing ns , the width of the electron system increases so that the effective three-dimensional density and the Fermi energy remain essentially constant. The dependence of the low-temperature electron mobility on ns is also reported.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.101577
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Effect of enriched live feeds on survival and growth rates in larval Korean rockfish, Sebastes schlegeli Hilgendorf (2001)
    Oxford, UK : Blackwell Science Ltd
    Aquaculture research 32 (2001), S. 0 
    Details
    ISSN: 1365-2109
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: High mortality frequently occurs in larval mass production of Korean rockfish, Sebastes schlegeli Hilgendorf. Nutritional deficiencies in live feeds, rotifers and Artemia nauplii, fed to larvae could be a reason. A series of experiments was carried out to evaluate the effect of nutritional enrichment of live feeds by ω-yeast, Spirulina powder and Super SelcoTM on survival and growth rates in rockfish larvae. Preference of rockfish larvae for the live feeds was determined by analysis of stomach contents. In addition, the effect of green water produced by the use of Chlorella ellipsoidea and Spirulina powder on the growth performance of larvae was evaluated. Larvae fed rotifers nutritionally enriched with Super Selco showed significantly higher survival rates than those fed rotifers enriched with ω-yeast. Larvae fed rotifers that were nutritionally enriched with both Super Selco and Spirulina together exhibited improved growth and survival rates. Larvae fed Artemia nauplii nutritionally enriched with Spirulina powder showed significantly higher survival than larvae fed Artemia nauplii without enrichment. When larvae were fed rotifers, Artemia nauplii or the mixture of rotifers and Artemia nauplii, the second and last group showed significantly higher survival than the first group. Fatty acid composition in live feeds was improved by enrichment of ω-yeast and larvae fed this feed showed higher survival and growth rates compared with larvae fed non-enriched feeds. No positive effect of green water in the tank produced with C. ellipsoidea or Spirulina powder was observed on survival and growth rates for larvae fed nutritionally enriched rotifers with Super Selco and Spirulina powder. However, when the larvae were fed Artemia nauplii that were nutritionally enriched with ω-yeast and Spirulina powder, green water obtained by adding Spirulina powder to the tanks resulted in significantly higher growth rates of larvae than was obtained by adding C. ellipsoidea.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1365-2109.2001.00547.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    A case of primary erythromelalgia improved by mexiletine (2004)
    Oxford, UK : Blackwell Science Ltd
    British journal of dermatology 151 (2004), S. 0 
    Details
    ISSN: 1365-2133
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2133.2004.06167.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Transient breakdown behavior in electron-irradiated and proton-irradiated silicon p–n junctions (2000)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 76 (2000), S. 888-890 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We studied the turn-off transient behavior of electron- and proton-irradiated silicon p–n junction diodes. Electron-irradiated n+–p diodes showed transient current peaks at lower reverse voltages. When the forward current was increased, the height and the number of the peaks increased, and at each peak the diode voltage showed a sharp decrease. We explain that the increased ionization coefficients by the electron irradiation caused the current peak to appear during the turn-off transients. p+–n diodes irradiated under the same condition did not show the large peak. This suggests that only the defects in the p-type silicon are responsible for the current peaks. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.125619
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Observation of new type resonances in triple barrier resonant tunneling diodes (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 82 (1997), S. 2980-2983 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Current–voltage characteristics measured in triple barrier resonant tunneling diodes reveal new features about energy level alignment in a superlattice. Our data indicate that energy levels in the two quantum wells are not aligned at current peaks. Current peaks are observed when one of the energy levels in the two wells becomes resonant with the emitter level. One of the current peak was thermally activated, and showed inverted bistability at 77 K temperature. We explain that this is due to X state assisted tunneling. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.366134
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Effect of doping density on capacitance of resonant tunneling diodes (1997)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 82 (1997), S. 5206-5209 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: We studied capacitance and parallel resistance in resonant tunneling diodes as a function of the doping density in the emitter and the collector regions. Capacitance was obtained by analyzing resonance in the admittance measured. Our data show that the capacitance varies with the doping density, and that the capacitance is smaller than the value expected from the growth parameters. Electron density modulation exists around the barriers, and capacitance has doping density dependence as a result of the modulation. © 1997 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.366384
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Observation of a large capacitive current in a double barrier resonant tunneling diode at resonance (1994)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 64 (1994), S. 2276-2278 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Capacitance-voltage measurements of double barrier In0.53Ga0.47As/AlAs resonant tunneling diodes show a large capacitance peak at a bias near resonance. The measured peak capacitance is about five times larger than the calculated depletion capacitance. This large capacitance is interpreted as the capacitance between the emitter and the quantum well, which is activated near resonance only when the quantum well has a sufficient number of electrons to screen the ac electric field. An equivalent circuit with the new added series RC component is proposed and the effect on the high frequency operation of a resonant tunneling diode is discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.111642
    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...