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  • Articles  (75)
  • Springer  (75)
  • 2000-2004  (24)
  • 1985-1989  (34)
  • 1920-1924  (1)
  • 1905-1909  (16)
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  • Articles  (75)
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  • 1
    Electronic Resource
    Electronic Resource
    Vergleich verschiedener planarer Passivierungstechniken für Halbleiterleistungsbauelemente (1989)
    Springer
    Electrical engineering 72 (1989), S. 89-94 
    Details
    ISSN: 1432-0487
    Source: Springer Online Journal Archives 1860-2000
    Topics: Electrical Engineering, Measurement and Control Technology
    Description / Table of Contents: Contents Different passivation techniques for planar semiconductor power devices with blocking voltages of 1600 V are studied using two-dimensional numerical simulations.
    Notes: Übersicht Für die Entwicklung einer optimalen Planar-passivierung von Halbleiterleistungsbauelementen mit Sperrspannungen von 1600 V wird ein Vergleich verschiedener Strukturen anhand zweidimensionaler numerischer Simulationen durchgeführt.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01573642
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  • 2
    Electronic Resource
    Electronic Resource
    Distribution and Variability of Surface Soil Properties at a Regional Scale (2000)
    Springer
    Soil Science Society of America journal 64 (2000), S. 974-982 
    Details
    ISSN: 1435-0661
    Keywords: MBC, microbial biomass carbon MEP, Mehlich extractable phosphorus MLRA, Major Land Resource Areas MWD, mean-weight diameter NRCS, Natural Resources Conservation Service NRI, National Resource Inventory PMN, potentially mineralizable nitrogen PSU, primary sampling units TOC, total organic carbon WSA, water stable aggregates
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geosciences , Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: e transformation resulted in normal distributions for most soil properties and reduced variability two- to threefold. However, a few soil properties remained non-normally distributed. Soil pH may be monitored at the regional scale with a high degree of precision. Small changes in soil C content (3–8% of the regional mean) may be detected using loge transformed total organic C as the indicator. Sampling soil properties as part of the NRI should improve NRCS' ability to monitor soil condition on a regional scale.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/
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  • 3
    Electronic Resource
    Electronic Resource
    Human ferritin H and L sequences lie on ten different chromosomes (1987)
    Springer
    Human genetics 〈Berlin〉 76 (1987), S. 66-72 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In humans, the H (heavy) and L (light) chains of the iron-storage protein ferritin, are derived from multigene families. We have examined the chromosomal distribution of these H and L sequences by Southern analysis of hybrid cell DNA and by chrosomal in situ hybridization. Our results show that human ferritin H genes and related sequences are found on at least seven different chromosomes while L genes and related sequences are on at least three different chromosomes. Further, we have mapped the chromosomal location of expressed genes for human H and L ferritin chains and have found an H sequence which may be a useful marker for idiopathic hemochromatosis.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00283053
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  • 4
    Electronic Resource
    Electronic Resource
    A High-Performance Liquid Chromatographic Microassay Employing a Liquid–Solid Extraction Technique for Etintidine in Plasma (1987)
    Springer
    Pharmaceutical research 4 (1987), S. 133-136 
    Details
    ISSN: 1573-904X
    Keywords: etintidine ; high-performance liquid chromatography (HPLC) ; solid extraction ; determination of etintidine in plasma
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Abstract This paper describes a new, rapid solid extraction method for the determination of etintidine in plasma. The method employs a semiautomatic sample preparation system. Plasma samples and the internal standard (cimetidine) were applied onto octyl-bonded silica extraction columns. The extraction columns were then subjected to Tris buffer and water wash and were subsequently loaded onto an automatic sample injection system. The contents of the extraction columns were eluted on-line with a mobile phase of acetonitrile:methanol:0.1% ammonium hydroxide (85:10:5, by volume) onto a silica analytical column and detected by UV absorption at 229 nm. The chromatographic condition separates etintidine from some of its metabolites and other endogenous components in plasma. The detection limit for etintidine was 0.02–0.05 µg/ml when 0.2 ml of plasma was used. This method has been used for the determination of plasma etintidine levels in humans and mice after oral administration of etintidine and was found to be suitable for pharmacokinetic/bioavailability studies of etintidine in humans and animals. The method can also be used for the quantitative determination of cimetidine and certain metabolites of etintidine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1016419019715
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  • 5
    Electronic Resource
    Electronic Resource
    Die Wirkungen der totalen Leberexstirpation (1924)
    Springer
    Reviews of physiology, biochemistry and pharmacology 23 (1924), S. 212-273 
    Details
    ISSN: 1617-5786
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Chemistry and Pharmacology , Medicine
    Notes: Zusammenfassung Kurz zusammengefasst sind die wichtigsten, hier niedergelegten Tatsachen folgende: Es wurde eine Methode für die totale Entfernung der Leber bei Hunden ausgebildet, welche frei von den meisten Fehlerquellen ist, die früheren Exstirpationsmethoden des Organs bei Säugetieren anhaften. Es wurde gefunden, dass eine geeignete Einführung von Glukose bei derart operierten Hunden das Leben viele Stunden nach Verlust des gesamten Lebergewebes erhält. Von den vielen an hepatektomierten Tieren gemachten Beobachtungen möchten wir hervorheben, 1. dass die Leber zur Erhaltung des Blutzuckerspiegels absolut wesentlich ist; 2. dass die Leber der wichtigste Faktor, wenn nicht der einzige, bei dem Prozess der Desamidierung und der Harnstoffbildung ist, und 3. dass Bilirubin auch ohne Mitwirkung der Leber gebildet werden kann.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01924578
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  • 6
    Electronic Resource
    Electronic Resource
    The Physical Tourist¶Scientific Travels in the Irish Countryside (2000)
    Springer
    Physics in perspective 2 (2000), S. 313-326 
    Details
    ISSN: 1422-6960
    Keywords: Key words. History of science; Ireland; Rosse Telescope; St. Patrick's College; Birr Demense; Irish National Museum (Galway); Giant's Causeway.
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract. Newly-prosperous Ireland has a number of sites which the scientific traveller can visit. There are apparatus museums at Birr and Maynooth, and a collection of early apparatus at the physics department of the Irish National University in Galway. The main attraction at Birr is the Rosse Telescope, with its 6-ft diameter speculum, built in the 1840s, and recently refurbished. Travellers to Northern Ireland can see applied geology at the Giant's Causeway.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s000160050048
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  • 7
    Electronic Resource
    Electronic Resource
    Carbaryl inhibition of interferon synthesis in cultured goldfish cells (1985)
    Springer
    Bulletin of environmental contamination and toxicology 34 (1985), S. 109-113 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01609710
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  • 8
    Electronic Resource
    Electronic Resource
    Effects of carbaryl on differentiated and undifferentiated neuroblastoma cells: Inhibition of growth rates and direct cell toxicity (1987)
    Springer
    Bulletin of environmental contamination and toxicology 38 (1987), S. 143-150 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01606572
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  • 9
    Electronic Resource
    Electronic Resource
    Localization of the ornithine aminotransferase gene and related sequences on two human chromosomes (1987)
    Springer
    Human genetics 〈Berlin〉 76 (1987), S. 121-126 
    Details
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary We have used a full length cDNA clone to determine the chromosomal location ofthegene encoding human ornithine aminotransferase (OAT), a mitochondrial matrix enzyme. Southern blot analysis of ScaI-digested DNA from 34 human-mouse somatic cell hybrids revealed 11 human fragments. Three fragments mapped to chromosome 10q23-10qter, confirming the previous provisional assignment of the functional gene to this autosome by analysis of OAT expression in somatic cell hybrids (O'Donnell et al. 1985). The remaining eight fragments were assigned to the X chromosome, and regionally assigned to Xp21-Xp11 by use of an X-chromosome mapping panel. These X chromosome sequences could represent pseudogenes, or related members of a multigene family. Two of the X chromosome fragments are alternate alleles of a restriction fragment length polymorphism (RFLP) making this OAT-related locus an excellent genetic marker. The RFLP may now be used to determine any possible relationship between this locus and several X-linked eye defects.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00284906
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  • 10
    Electronic Resource
    Electronic Resource
    Seed dispersal and movement patterns in two species of Ceratogymna hornbills in a West African tropical lowland forest (2000)
    Springer
    Oecologia 125 (2000), S. 249-257 
    Details
    ISSN: 1432-1939
    Keywords: Seed dispersal Seed shadow Hornbills Telemetry Tropical frugivory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract. We studied two species of Ceratogymna hornbills, the black-casqued hornbill, C. atrata, and the white-thighed hornbill, C. cylindricus, in the tropical forests of Cameroon, to understand their movement patterns and evaluate their effectiveness as seed dispersers. To estimate hornbill contribution to a particular tree species' seed shadow we combined data from movements, determined by radio-tracking, with data from seed passage trials. For 13 individuals tracked over 12 months, home range varied between 925 and 4,472 ha, a much larger area than reported for other African avian frugivores. Seed passage times ranged from 51 to 765 min, with C. atrata showing longer passage times than C. cylindricus, and larger seeds having longer gut retention times than smaller seeds. Combining these data, we estimated that seed shadows were extensive for the eight tree species examined, with approximately 80% of seeds moved more than 500 m from the parent plant. Maximum estimated dispersal distances for larger seeds were 6,919 and 3,558 m for C. atrata and C. cylindricus, respectively. The extent of hornbill seed shadows suggests that their influence in determining forest structure will likely increase as other larger mammalian dispersers are exterminated.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004420000445
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