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  • 2000-2004  (2)
  • 1965-1969  (5)
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  • 1
    Electronic Resource
    Electronic Resource
    High-power AlGaInN flip-chip light-emitting diodes (2001)
    Woodbury, NY : American Institute of Physics (AIP)
    Applied Physics Letters 78 (2001), S. 3379-3381 
    Details
    ISSN: 1077-3118
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Data are presented on high-power AlGaInN flip-chip light-emitting diodes (FCLEDs). The FCLED is "flipped-over" or inverted compared to conventional AlGaInN light-emitting diodes (LEDs), and light is extracted through the transparent sapphire substrate. This avoids light absorption from the semitransparent metal contact in conventional epitaxial-up designs. The power FCLED has a large emitting area (∼0.70 mm2) and an optimized contacting scheme allowing high current (200–1000 mA, J∼30–143 A/cm2) operation with low forward voltages (∼2.8 V at 200 mA), and therefore higher power conversion ("wall-plug") efficiencies. The improved extraction efficiency of the FCLED provides 1.6 times more light compared to top-emitting power LEDs and ten times more light than conventional small-area (∼0.07 mm2) LEDs. FCLEDs in the blue wavelength regime (∼435 nm peak) exhibit ∼21% external quantum efficiency and ∼20% wall-plug efficiency at 200 mA and with record light output powers of 400 mW at 1.0 A. © 2001 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.1374499
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  • 2
    Electronic Resource
    Electronic Resource
    Immunohistochemical Detection of Components of the Insulin-Like Growth Factor System during Skeletal Muscle Growth in the Pig (2001)
    Oxford UK : Blackwell Science Ltd.
    Anatomia, histologia, embryologia 30 (2001), S. 0 
    Details
    ISSN: 1439-0264
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: The insulin-like growth factor (IGF) system plays an important role in postnatal somatic and skeletal muscle growth in pigs. There is little information on the occurrence and distribution of components of the IGF system in postnatal porcine skeletal muscle. IGF-I, IGF receptor 1 (IGF1R) and the IGF-binding proteins IGFBP-1 and -3 in longissimus dorsi and triceps brachii were localized in muscle biopsies from 12 commercially crossbred pigs aged from 28 to 199 days as well as from the sire generation, by immunohistochemistry. Plasma IGF-I concentrations were also determined using radioimmunoassays. Unlike other species, IGF-I was localized in porcine skeletal muscle fibres. Staining intensity correlated with the highest plasma IGF-I levels and phases of intensive muscle growth from the 11th to 22nd week. The pattern of IGF1R immunostaining, which was strong, correlated with that of IGF-I. IGF1R was also localized in endomysial tissues. IGFBP-1 was not detected within muscle fibres, but was found in the endomysium and vessel walls, while IGFBP-3 was localized with IGF-1 and its receptor. Higher magnification revealed that IGF1R, IGFBP-3 and probably IGF-I appeared in the tubular system. Inhibitory as well as stimulating controls of IGFBP-1 and -3 on IGF functions are discussed, which may maintain a balance between autocrine growth promoting activities of IGF-I and IGF1R.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1439-0264.2001.00297.x
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  • 3
    Electronic Resource
    Electronic Resource
    Zur Synthese und Kristallographie eines Co-Ludwigits, Co2Co(O2/BO3) (1966)
    Springer
    Naturwissenschaften 53 (1966), S. 475-475 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00601749
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  • 4
    Electronic Resource
    Electronic Resource
    Zur Kenntnis der Kristallphase Na-Titanphosphat (1969)
    Springer
    Naturwissenschaften 56 (1969), S. 35-35 
    Details
    ISSN: 1432-1904
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00599592
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  • 5
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    Unknown
    Ess, J. v.: Die Gedankenwelt des Harit, al-Muhasibi dargestellt und erläutert (Book Review) (1965)
    Berlin : Periodicals Archive Online (PAO)
    Orientalistische Literaturzeitung. 60:11/12 (1965:Nov./Dez.) 584 
    Details
    ISSN: 0030-5383
    Topics: Linguistics and Literary Studies , Ethnic Sciences , History
    Notes: Besprechungen
    URL: http://gateway.proquest.com/openurl?url_ver=Z39.88-2004&res_dat=xri:pao:&rft_dat=xri:pao:article:4148-1965-060-11-000007
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  • 6
    Electronic Resource
    Electronic Resource
    Veränderlichkeit des chromosomalen polymorphismus beiDrosophila subobscura (1965)
    Springer
    Genetica 36 (1965), S. 83-104 
    Details
    ISSN: 1573-6857
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract In order to determine whether chromosomal inversion polymorphism inDrosophila subobscura is stable or varies from season to season, samples from selected sites were taken and analyzed at regular intervals. In 1960 the descendants of 749 females from samples collected at four sites in five months were examined. In 1963 and 1964, samples weretaken from only two sites at three seasons (spring, summer, autumn). Each of the twelve samples totalled 60 males which were then individually crossed with females from the “Küsnacht” stock, homozygous for the standard sequences. Eight descendant larvae from each cross were analyzed. Samples were judged according to the following criteria: a) Occurrence and frequencies of gene arrangements; b) Occurrence and frequencies of hetero- and homokaryotypes for each chromosome; c) distribution pattern of polymorphism over the entire set of chromosomes (shown in diagram of heterokaryotypes). Our results show that between samples from 1963 and 1964 there are yearly, seasonal and local differences in karyotype. The starting frequency of heterokaryotypes in the spring of one year differed from that of the next. Both frequencies increased from spring to autumn. At the same time the standard sequences which appear more frequently on each chromosome than any other gene arrangement, decrease during the summer in favour of other arrangements. In our 1960 material we found that karyotypes differed from locality to locality. These differences, however, were only statistically significant in a few cases. Furthermore, these figures show a less regular fluctuation than those of the other two years. The varying results for the first year and the second two may be due to differences in the size of our samples; further to secondary effects brought about by the use of different methods, and possibly to actual differences in the sampled populations.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01557145
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  • 7
    Electronic Resource
    Electronic Resource
    Zur Kenntnis der zinkoxidreichen Phase im System ZnO—B2O3 (1969)
    Weinheim : Wiley-Blackwell
    Zeitschrift für anorganische Chemie 367 (1969), S. 281-288 
    Details
    ISSN: 0044-2313
    Keywords: Chemistry ; Inorganic Chemistry
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: The system ZnO—B2O3 has been investigated by means of crystal chemical methods in the region of the ZnO-rich phase. From the melt near 1100°C the ZnO-richest phase 3ZnO · B2O3 crystallises. Powder diagrams and optical constants are identical with those in the previous literature, although often the ZnO-richest phase was described as 3ZnO · B2O3. From x-ray data follows the space group Ic or I2/c. The lattice parameters are: a0 = 23.52, b0 = 5.08, c0 = 8.44 Å; β = 97° 44′.
    Notes: Das System ZnO—B2O3 ist im Bereich der ZnO-reichen Phase kristallchemisch untersucht worden. Aus der Schmelze bei ∼1100°C kristallisiert als ZnO-reichste Phase das 3 ZnO · B2O3. Pulverdiagramme und optische Konstanten ergeben Übereinstimmung mit Literaturangaben, obwohl diese z. T. als 3 ZnO · B2O3 ausgewiesen werden. Aus Röntgeneinkristalluntersuchungen wurde die Raumgruppe Ic oder I2/c ermittelt. Die Gitterkonstanten sind: a0 = 23,52 Å, b0 = 5,08 Å, c0 = 8,44 Å, β = 97° 44′.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/zaac.19693670510
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