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
Filter
  • Electronic Resource  (15)
  • 1995-1999  (6)
  • 1990-1994  (5)
  • 1965-1969  (4)
  • 1
    Electronic Resource
    Electronic Resource
    Transmission electron microscopy study of rapid thermally annealed Pd/Ge contacts on In0.53Ga0.47As (1996)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 80 (1996), S. 3910-3914 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Phase formation in rapid thermally annealed Pd/Ge contacts on In0.53Ga0.47As has been investigated by means of cross-sectional transmission electron microscopy, convergent-beam electron diffraction, and energy-dispersive x-ray analysis. Solid-phase regrowth is observed to occur similarly as in Pd/Ge contacts on GaAs or InP. The reaction starts at low temperatures with the formation of an amorphous Pd–In–Ga–As layer, which crystallizes at elevated temperatures yielding hexagonal Pd4In0.53Ga0.47As being first described in this work. At temperatures (approximately-greater-than)250 °C, this phase decomposes due to epitaxial solid-phase regrowth of In0.53Ga0.47As and formation of Pd–Ge phases. The stable composition is reached at temperatures (approximately-greater-than)350 °C with excess Ge diffused through top Pd–Ge to the contact interface and growing epitaxially on the semiconductor. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.363348
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Simple method for examining sulphur passivation of facets in InGaAs–AlGaAs (λ=0.98 μm) laser diodes (1996)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 68 (1996), S. 2467-2468 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: The effect of (NH4)2Sx treatment of the facet of InGaAs/AlGaAs ridge waveguide (RW) laser diodes on the nonradiative current and catastrophic optical damage (COD) level is reported. Using the power–voltage–current (P–V–I) characteristics of the electroluminescence at low injection levels, changes in the density of surface states at the laser facets are described. © 1996 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.115822
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Au–Sn solder bumps with tungsten silicide based barrier metallization schemes (1995)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 67 (1995), S. 2367-2369 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A homogeneous melting eutectic Au/Sn solder bump for flip-chip application has been developed. The underbump metallization consists of a WSi0.4N0.2-layer and a Ni-wetting layer. The solder is deposited as a sequence of alternating Au and Sn layers. The bump can be exposed to multiple fluxless reflow cycles. The reflow of the solder as deposited starts with a phase forming process in the solid state which results in an eutecticlike phase and the near eutectic δ and ζ phases. The δ and ζ phases dissolve during the liquid state stage of the reflow at temperatures between 300 and 350 °C. © 1995 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.114347
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Quantum Interference, State Engineering, and Quantum Eraser (1995)
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 755 (1995), 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.1749-6632.1995.tb38995.x
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    Functional aspects of secondary carotenoids in Haematococcus lacustris (Girod) Rostafinski (Volvocales). V. Influences on photomovement (1993)
    Oxford, UK : Blackwell Publishing Ltd
    Plant, cell & environment 16 (1993), S. 0 
    Details
    ISSN: 1365-3040
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Secondary carotenoids are suspected to modulate photomovement in Haematococcus lacustris [Girod] Rostafinski (Volvocales). To investigate the influence of these extrachloroplastic ketocarotenoids on phototactic and photophobic responses in the flagellate stage of the green alga, flagellate suspensions differing in the content of secondary carotenoids were grown from green and red aplanospores. Photo-orientation of these flagellates induced by unilateral irradiation was investigated using a computer-aided system for microscopic image analysis. Results were hypothetically summarized as follows:(1) Diminution of precision of the positive phototaxis was found in red flagellates. This might be due to cellular shading of the blue-light-sensitive photoreceptor by secondary carotenoids.(2) Red flagellates exhibited an increase in the photophobic response. This finding is discussed in relation to an adaptive increase of the photoreceptor sensitivity, thought to be a result of the higher optical density of the corresponding cell suspension in the blue wavelength region.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-3040.1993.tb00523.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
    The yeast phosphatase system (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Molecular microbiology 4 (1990), S. 0 
    Details
    ISSN: 1365-2958
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology , Medicine
    Notes: Yeast cells produce a set of enzymes which are involved in the metabolism of phosphate, and include acid and alkaline phosphatases as well as permeases. Most of these enzymes are synthesized in response to the presence or absence of inorganic phosphate. In the past few years a considerable amount of genetic and molecular evidence has accumulated and a rather precise overall picture emerges which describes the mechanism of phosphate control at the level of gene activation. This mini-review summarizes these data. The main focus lies on the regulatory features associated with the control of transcription of PH05, a gene coding for most of the regulated acid phosphatase activity produced by yeast cells.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2958.1990.tb00560.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
    Transmission of High-power Laser Light through Tapered Dielectric Tubes and Rods (1965)
    [s.l.] : Nature Publishing Group
    Nature 207 (1965), S. 281-282 
    Details
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Fig. 1. Schematic diagram of a tapered light guide. The beam is propagated from the right to the left. The measurements are given in Table 1 Table 1. MEASUREMENTS OP THE TAPERED GUIDES No. Type a* b c d e / g (mm) 1 Glass rod 75 32 21 3-0 0-9 _ 2 148 34 ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/207281a0
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Editorial (1997)
    Springer
    Applied physics 65 (1997), S. 683-683 
    Details
    ISSN: 1432-0649
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract The Spring Meetings of the German Physical Society have long been an essential forum for physicists in Germany, Austria and Switzerland. These conferences, held at different universities, provide a lively and unique atmosphere for young researchers, in particular, in which to present their most recent results to a broad audience, establish new contacts and discuss future projects. This special issue of Applied Physics B – Lasers and Optics – features selected papers presented at the 1997 Spring Meeting of the Quantum Optics Section, held at the University of Mainz. Clearly, a selection of articles cannot provide exhaustive coverage of the scientific program of a conference. Nevertheless, the reader will hopefully get an impression of the broad range of the discussed topics, maybe even of the international spirit. The board of editors of the journal as well as the guest editors have planned this special issue as the beginning of a trend to highlight top-quality modern research presented at future meetings of the Quantum Optics Section by publication in Applied Physics B – Lasers and Optics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s0034070650683
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    Effects of dopamine infusion on plasma catecholamines in preterm and term newborn infants (1991)
    Springer
    European journal of pediatrics 150 (1991), S. 503-506 
    Details
    ISSN: 1432-1076
    Keywords: Dopamine infusion ; Newborn infants ; Plasma catecholamines ; Noradrenaline ; Adrenaline
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Newborn infants (21 preterm and 13 term) received dopamine infusions at a low (2.5–3.4 μg/kg per min) and/or high (5–10 μg/kg per min) infusion rate and changes in plasma catecholamines were monitored. The mean baseline values for dopamine, noradrenaline and adrenaline were between 240 and 560, 125 and 144 and 62 and 82 pg/ml, respectively. During low-rate infusion of dopamine, there was a significant increase in plasma dopamine (20–100fold), noradrenaline (three- to five-fold) and adrenaline (threefold). Administration of dopamine at the high rate resulted in an even larger increase in the plasma catecholamines (dopamine, 100–300fold; noradrenaline, seven- to eightfold; adrenaline, four- to sixfold). In a double-log plot, there was a highly significant correlation between the plasma concentrations of dopamine and noradrenaline (r=0.77;P〈0.001). In conclusion, infusion of dopamine in term and preterm newborn infants is accompanied by an enhanced sympatho-adrenal tone which may contribute to the cardiovascular effects of dopamine in these patients.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01958433
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Simultaneous epiglottitis in siblings (1991)
    Springer
    European journal of pediatrics 150 (1991), S. 859-859 
    Details
    ISSN: 1432-1076
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01955011
    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...