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
    Growth of InGaAsP/InP single-quantum-well and multiple-quantum well structures by low-pressure metal-organic chemical vapor deposition (1991)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 69 (1991), S. 7267-7272 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: InGaAsP/InP single-quantum well and multiquantum-well (MQW) structures have been successfully grown by low-pressure metalorganic chemical vapor deposition (LP-MOCVD). The quantum wells grown consist of 1.3- and 1.5-μm composition InGaAsP, with barriers of InP. Layer thicknesses vary from 18 to 1300 A(ring) for the various structures grown. Analysis of these structures by low-temperature photoluminescence reveals distinct, sharp luminescent peaks, with half-widths from 4.8 to 13 meV. Cross-sectional transmission electron microscopy (XTEM) and Auger spectroscopy of the quantum-well structures reveals extremely sharp interfaces and homogeneous composition, demonstrating the feasibility of LP-MOCVD for the growth of very thin epitaxial layers. This preliminary data indicates that the growth of MQW structures for the next generation of laser diodes (i.e., MQW-distributed-feedback lasers), with monolayer interfacial abruptness, is possible by LP-MOCVD.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.347624
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Observation of proposed flux pinning sites in neutron-irradiated YBa2Cu3O7−x (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 57 (1990), S. 2150-2152 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Microstructure and magnetic hysteresis have been compared for two samples of the YBa2Cu3O7−δ (δ∼0) high-temperature superconductor, one unirradiated, and one irradiated with fast neutrons (E(approximately-greater-than)0.1 MeV) to a fluence of 3×1018 n/cm2. Notable changes in the microstructure include strain-induced contrast from regions 2–7 nm in size. An intrinsic critical current density (Jc) of 4.6×106 A/cm2 in zero field at 4 K has been determined from magnetic hysteresis measurements for the irradiated sample while 1.2×106 A/cm2 is noted for the unirradiated sample. We propose that the observed defect structure in the irradiated material is responsible for increased pinning and consequently higher Jc's.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.104159
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Nanocrystalline Domains of a Monoclinic Modification of Benzene Stabilized in a Crystalline Matrix of C60 (1994)
    s.l. : American Chemical Society
    Chemistry of materials 6 (1994), S. 1325-1329 
    Details
    ISSN: 1520-5002
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/cm00044a033
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    Ferroelectric polarization mechanisms in nylon 11 (1992)
    s.l. : American Chemical Society
    Macromolecules 25 (1992), S. 3729-3732 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00040a019
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 5
    Electronic Resource
    Electronic Resource
    High-temperature characteristics of nylon-11 and nylon-7 piezoelectrics (1991)
    s.l. : American Chemical Society
    Macromolecules 24 (1991), S. 6644-6652 
    Details
    ISSN: 1520-5835
    Source: ACS Legacy Archives
    Topics: Chemistry and Pharmacology , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1021/ma00025a014
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 6
    Electronic Resource
    Electronic Resource
    Characterization and analysis of human papillomaviruses of skin warts (1993)
    Springer
    Archives of dermatological research 285 (1993), S. 460-465 
    Details
    ISSN: 1432-069X
    Keywords: HPV ; Skin warts ; Dot blot hybridization ; Southern blot hybridization
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract We analysed human papillomavirus (HPV) infections in 61 tissue specimens of skin warts of Taiwanese patients by DNA hybridization. The prevalence of HPV infection was 69% by Southern blot hybridization. The typing of HPVs was performed by dot blot hybridization under highly stringent conditions with each probe separately. The prevalence of HPV-1, 2/3, 4, 5, 8, 11, 16 and 18 in skin warts was 13, 7, 16, 2, 0, 5, 2 and 8%, respectively. Chi-squared analysis revealed that there was a correlation between HPV type and copy number. Most HPV-4-induced warts were verruca vulgaris. HPV-1 DNA was detected in verruca plantaris and verruca vulgaris. No specific histopathological features were found to be indicative of the presence or absence of HPV, or of the various types of HPV infection.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00376818
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 7
    Electronic Resource
    Electronic Resource
    Microstructural development in non-oriented lamination steels (1990)
    Springer
    Journal of materials science 25 (1990), S. 4567-4570 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Two low carbon steels, in the temper-rolled condition, have been examined using a combination of light microscopy, scanning electron microscopy and transmission electron microscopy. The thermomechanical processing fragments the pearlite colonies and both cavities and cracks were found to be associated with cementite particles. It is suggested that these cracks and cavities arise during cold rolling due to the interaction of dislocation pile-ups with cementite. Subsequent growth occurred during continuous annealing.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01129907
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 8
    Electronic Resource
    Electronic Resource
    Microstructural development in non-oriented lamination steels (1990)
    Springer
    Journal of materials science 25 (1990), S. 4785-4791 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The effect of cold rolling and annealing on the structure of two lamination steels has been examined using scanning electron microscopy and transmission electron microscopy. It is demonstrated that the massive films of cementite (which are a characteristic of the hot rolled strip) are fragmented during cold rolling. Fracture of the massive films occurred in a brittle manner. Smaller cementite precipitates did not fail by brittle cracking but sometimes necked down leading to ductile failure. Annealing in either the two-phase ferrite plus cementite, or ferrite plus austenite regions led to the gradual development of cavities. It is likely that these cavities grew by the short-circuit diffusion of excess vacancies driven by pre-strains.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01129943
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 9
    Electronic Resource
    Electronic Resource
    The interaction between proeutectoid ferrite and austenite during the isothermal transformation of two low-carbon steels — a new model for the decomposition of austenite (1993)
    Springer
    Journal of materials science 28 (1993), S. 4571-4577 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Both scanning electron microscopy (SEM) and transmission electron microscopy (TEM) have been employed to examine the austenite to proeutectoid ferrite and ferrite/carbide reactions in two low-carbon (0.04 wt%) steels. It is demonstrated that proeutectoid ferrite (both polygonal and Widmanstätten) can “partition” the prior austenite grains into several smaller units or pools. It is also shown that prior to the initiation of the pearlite reaction, ferrite grain growth can occur. The pools of austenite exert a Zener-like drag force on the migrating ferrite grain boundaries. However, the ferrite boundaries can eventually break away and small pools of austenite become completely embedded in single proeutectoid ferrite grains. Subsequently, these small pools of austenite transform to discrete regions of cementite, together with epitaxial ferrite. Conversely, certain small pools remain in contact with the ferrite grain boundaries and it is considered that transformation of these latter pools will eventually lead to the formation of massive films of cementite at the ferrite grain boundaries. Larger pools of austenite prevent ferrite boundary breakaway, and these latter, austenitic regions eventually transform to pearlite.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00414244
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 10
    Electronic Resource
    Electronic Resource
    Microstructural development in non-oriented lamination steels (1990)
    Springer
    Journal of materials science 25 (1990), S. 1699-1710 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The isothermal decomposition of austenite in two commercial low carbon (0.04 w/o) steels has been examined using scanning electron microscopy and transmission electron microscopy. Particular emphasis has been placed on analysing the pearlite reaction and the development of massive films of cementite at pro-eutectoid ferrite/pearlite interfaces. Similarly, grain boundary precipitation of cementite has been investigated. The results strongly support the contention that films of cementite at ferrite/pearlite interfaces form predominantly by a coarsening process. In addition, it is shown that grain boundary precipitation of cementite can occur from super-saturated ferrite or from the decomposition of austenite. Examination of the early stages of the pearlite reaction has provided evidence that multiple nucleation of cementite can be a necessary precursor to the development of a pearlite colony.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01045373
    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...