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  • 1995-1999
  • 1990-1994  (6)
  • 1990  (6)
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  • 1995-1999
  • 1990-1994  (6)
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Keywords
  • 1
    Electronic Resource
    Electronic Resource
    Laser writing of superconducting patterns on YBa2Cu3Ox films (1990)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 57 (1990), S. 1149-1152 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: A novel process for the direct laser writing of thin-film high Tc patterns is demonstrated. The process consists of deposition of a high quality film (308 nm laser ablation from a YBa2Cu3Ox target with a 750 °C substrate temperature and a 150 mTorr O2 ambient), annealing in an inert atmosphere (Ar at 400 °C for 5–20 min) to reduce the oxygen content and depress or eliminate the superconducting transition temperature, and direct-write laser heating (1.06 μm at ≈0.5 kW/cm2 for ≈5 min) in an oxygen atmosphere at ≈590 Torr to selectively regenerate the high Tc material. rf eddy current and four-point resistivity probe results confirm this process for both SrTiO3 and LaAlO3 substrates. Scanning electron micrographs indicate that this is a very mild processing sequence with no observable changes in film morphology.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.104222
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Giant nerve abscesses in leprosy (1990)
    Oxford, UK : Blackwell Publishing Ltd
    Clinical and experimental dermatology 15 (1990), S. 0 
    Details
    ISSN: 1365-2230
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Two leprosy patients with neuritis caused by giant abscesses involving almost the entire ulnar nerve are described. One patient, who also had skin lesions, was diagnosed histopathologically as having borderline tuberculoid leprosy both on skin and nerve biopsy, and the other, with only nerve involvement, belonged to the pure neuritic group. The lepromin test was strongly positive (with a vesicular reaction in one patient) and lymphocyte transformation to Mycobacterium leprae antigen was raised. These lesions can be easily mistaken for a peripheral nerve tumour in places where leprosy is uncommon. A brief account of the management of nerve abscess in leprosy is given.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2230.1990.tb02110.x
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Nadularity of Nerves in Treated Leprosy (1990)
    Oxford, UK : Blackwell Publishing Ltd
    International journal of dermatology 29 (1990), S. 0 
    Details
    ISSN: 1365-4632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: : Ten patients with fully treated pauchibacillary leprosy, mainly tuberculoid, had asymptomatic nodules present along the peripheral nerves that persisted even after the skin lesions had completely subsided and treatment was stopped. Histopathology of the nodules revealed no signs of activity of the disease. The evolution, follow-up care, and significance of these nodules are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-4362.1990.tb04843.x
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Expression of 87A, 87C and 93D heat shock puffs in trisomic (2L and3L) strains ofDrosophila melanogaster: Evidence for a functional relation between 93D and 87C (1990)
    Springer
    Chromosoma 99 (1990), S. 71-75 
    Details
    ISSN: 1432-0886
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Abstract Chromosomal RNA synthesis of the three heat shock puffs 87A, 87C and 93D examined in trisomic3L (T3L) and trisomic2L (T2L) strains ofDrosophila melanogaster and compared with that of Oregon R + and compound stocks of the3rd [C(3L) VGI ru st; F(3R) VDI e s/F(3R) VDI es] and2nd [C(2L) SHI+; F(2R) bw] chromosomes. The activity at two different temperatures (22° and 37° C) was monitored by [3H]uridine autoradiography. The results that while in the controlT3L andT2L nuclei (22° C), the 93D puff shows a higher level of transcriptional activity than in the Oregon R+ or compound stocks used as controls, inT3L andT2L nuclei from heat-shocked sets (37° C), 93D does not show further induction compared with heatshocked controls, and the 87C puff is 2.8 times more active than the 87A puff. These results suggest that there may be a direct functional and/or regulatory relationship between the activity of 93D and certain sequence specific activity of 87C, and that an optimum level of activity delimits the activity of the heat shock puff 93D inD. melanogaster.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01737291
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    Paper (German National Licenses)
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  • 5
    Electronic Resource
    Electronic Resource
    Cavitation and fracture of mechanically alloyed aluminium at high homologous temperatures (1990)
    Springer
    Journal of materials science 25 (1990), S. 4125-4132 
    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 tensile behaviour of mechanically alloyed (dispersion strengthened) IN90211 was characterized at strain rates between 0.0001 and 340 sec−1 at temperatures between 425 and 475 ° C, At strain rates above 0.1 sec−1, superplastic elongations were obtained (maximum elongation 525% at 475 ° C, 2.5sec−1. Large elongations were possible due to the lack of cavitation, even though the strain-rate sensitivity was lower (m ≈ 0.25) than usually found in superplasticity. Cavitation was precluded by the morphology of the platelet-shaped grains in which low-angle subgrain boundaries were predominantly perpendicular to the tensile axis. Grain-boundary sliding was observed along high-angle grain boundaries which were generally parallel to the tensile axis. At the high homologous testing temperatures (0.76 to 0.81), concurrent grain-boundary sliding and lattice slip was made possible by the rapid lattice diffusivity and easy climb of lattice dislocations over dispersions in the matrix and grain boundaries.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00582492
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    Paper (German National Licenses)
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  • 6
    Electronic Resource
    Electronic Resource
    Electrical properties of chlorinated atactic polypropylene (CAPP) and PVC-DOP-CAPP system (1990)
    New York, NY [u.a.] : Wiley-Blackwell
    Journal of Applied Polymer Science 39 (1990), S. 1485-1493 
    Details
    ISSN: 0021-8995
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics , Physics
    Notes: The electrical properties, such as dielectric properties and volume resistivity, of chlorinated atactic polypropylene(CAPP), obtained by thermal chlorination of APP, have been studied. The results show that dielectric constant, loss tangent, and volume resistivity of the chlorinated samples increase with the increase in degree of chlorination. The effect of CAPP as secondary plasticizer in the PVC-DOP system has also been studied. Dielectric study of PVC compounds shows a single relaxation peak, indicating no phase separation. In the case of PVC compounds, it has been observed that with the increase in CAPP content in PVC compounds dielectric constant and loss tangent decrease whereas volume resistivity increases. The increase in volume resistivity was further supported by the increase in activation energy value, obtained from volume resistivity vs. 1/T plot.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/app.1990.070390707
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    Paper (German National Licenses)
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