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  • 2000-2004  (10)
  • 1970-1974  (10)
  • 1960-1964  (2)
  • 1930-1934  (1)
  • 11
    Electronic Resource
    Electronic Resource
    Phenitrone and marihuana induced hypothermia (1971)
    Springer
    Cellular and molecular life sciences 27 (1971), S. 1191-1192 
    Details
    ISSN: 1420-9071
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Résumé Le phénitrone, souvent considéré comme antagoniste spécifique de la marihuana, n'a non seulement pas empèché la baisse de température corporelle causé par la tétrahydrocannabinol (THC), mais potentialisé l'effet hypothermique de cette dernière. Il est possible que cette potentialisation est par suite du déplacement de la THC localisée dans les protéines plasmiques.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02286922
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    Paper (German National Licenses)
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  • 12
    Electronic Resource
    Electronic Resource
    Beef cattle reproduction in the wet tropics (1973)
    Springer
    International journal of biometeorology 17 (1973), S. 135-139 
    Details
    ISSN: 1432-1254
    Source: Springer Online Journal Archives 1860-2000
    Topics: Geography , Physics
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01809799
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    Paper (German National Licenses)
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  • 13
    Electronic Resource
    Electronic Resource
    A first estimate of organic carbon storage in Holocene lake sediments in Alberta, Canada (2000)
    Springer
    Journal of paleolimnology 24 (2000), S. 395-400 
    Details
    ISSN: 1573-0417
    Keywords: carbon storage ; lake sediment ; Holocene ; Canada ; climate change ; organic matter
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract This paper reports a first estimate of the Holocene lake sediment carbon pool in Alberta, Canada. The organic matter content of lake sediment does not appear to depend strongly on lake size or other limnological parameters, allowing a simple first estimate in which we assume all Alberta lake sediment to have the same organic matter content. Alberta lake sediments sequester about 15 g C m-2 yr-1, for a provincial total of 0.23 Tg C yr-1, or 2.3 Pg C over the Holocene. Alberta lakes may represent as much as 1/1700 of total global, annual permanent carbon sequestration.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1008103605817
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    Paper (German National Licenses)
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  • 14
    Electronic Resource
    Electronic Resource
    Particle-mediated gene transfer to rat neurons in primary culture (2000)
    Springer
    Pflügers Archiv 439 (2000), S. 730-738 
    Details
    ISSN: 1432-2013
    Keywords: Dorsal root ganglion neurons Gene gun Green fluorescent protein Hippocampal neurons Particle-mediated gene transfer Primary tissue culture Transfection
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract. Gene transfer into neuronal cells provides an important approach to study their function. Particle-mediated gene delivery was used to transfect rat dorsal root ganglion (DRG) and hippocampal neurons in primary culture with the genes for the enhanced blue and green fluorescent proteins (EBFP and EGFP) under control of the cytomegalovirus promoter. Quantitative analysis of marker protein fluorescence detected expression at 3 h that continued to increase for 48 h. For DRG neurons the optimal expression efficiency of 8±2% was obtained 24 h following transfection. In contrast, approximately 2±1% of hippocampal neurons in culture expressed EGFP at 3 h which subsequently declined. Co-transfection of DRG cultures with two plasmids produced reliable expression of both genes. Transfected DRG neurons exhibited normal electrophysiological properties, and resting and stimulated intracellular Ca2+ concentrations were unchanged. After transfection, 44% of hippocampal neurons remained in functional synaptic networks as indicated by glutamatergic Ca2+ spiking activity. Particle-mediated gene delivery provided a straightforward, reproducible and efficient method for transfection of neurons in primary culture. Transfected cells were easily identified by EGFP fluorescence, enabling subsequent physiological analysis. Biolistic particle bombardment was well tolerated by peripheral neurons, although caution was required when this method was applied to CNS cultures.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s004249900240
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    Paper (German National Licenses)
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  • 15
    Electronic Resource
    Electronic Resource
    Adsorption characteristics of foot-and-mouth disease virus selected by adsorption with homogenized calf kidney (1971)
    Springer
    Archives of virology 34 (1971), S. 82-87 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01250248
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    Paper (German National Licenses)
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  • 16
    Electronic Resource
    Electronic Resource
    Influence of divinyl ether-maleic anhydride (pyran) on foot-and-mouth disease virus infection: Effect on adsorption and multiplication in mouse tissues (1972)
    Springer
    Archives of virology 36 (1972), S. 232-239 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary The mechanism of resistance to foot-and-mouth disease virus (FMDV) which occurs 2 days after divinyl ether-maleic only anhydride (pyran copolymer) treatment but diminishes by the 7th day was investigated. Adsorption of virus by minced infant mouse spleen, muscle, kidney, heart or liver was not affected either at 2 days or 7 days after treatment of the mice with pyran. However,in vitro multiplication of FMDV in minced kidney was affected by pyran at both times. The resistance of mice 2 days after treatment was related to absence of virus in muscle, kidney, and spleen tissues. Seven days after pyran administration, however, FMDV was recovered from muscle and spleen but not kidney. Interferon was recovered from various tissues 2 days but not 7 days after mice were injected with pyran. Other unknown polymer-induced antiviral factors as well as interferon may have been related to the resistance mechanism.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01249854
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    Paper (German National Licenses)
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  • 17
    Electronic Resource
    Electronic Resource
    Studies with divinyl ether-maleic anhydride and foot-and-mouth disease vaccines in swine (1974)
    Springer
    Archives of virology 46 (1974), S. 334-340 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary Mice treated with divinyl ether-maleic anhydride (DVE/MA) 7 days before, 2 days before, or simultaneously with foot-and-mouth disease (FMD) viral antigens (aqueous or oil emulsified) were more resistant to virus infection and released antibody earlier than mice treated with antigen alone. Simultaneous treatment of swine with these antigens plus DVE/MA resulted in a slightly enhanced early antibody response, which, in a test with oil-emulsified antigen, was not associated with an early induced antiviral resistance to FMD. In general, the primary and secondary antibody responses to oil antigen plus DVE/MA were the same as in control swine receiving the antigen alone. However, swine sensitized with aqueous antigen plus DVE/MA responded faster and developed higher antibody titers after a secondary treatment with aqueous antigen than swine treated similarly but without DVE/MA.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01240075
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    Paper (German National Licenses)
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  • 18
    Electronic Resource
    Electronic Resource
    Minimal Presentations and Efficiency of Semigroups (2000)
    Springer
    Semigroup forum 60 (2000), S. 231-242 
    Details
    ISSN: 1432-2137
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mathematics
    Notes: S is said to be efficient if it can be defined by a presentation (A | R) with |R| -|A|=rank(H 2(S)). In this paper we demonstrate certain infinite classes of both efficient and inefficient semigroups. Thus, finite abelian groups, dihedral groups D 2 n with n even, and finite rectangular bands are efficient semigroups. By way of contrast we show that finite zero semigroups and free semilattices are never efficient. These results are compared with some well-known results on the efficiency of groups.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002339910016
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  • 19
    Electronic Resource
    Electronic Resource
    Foot-and-mouth disease virus: Protection induced in infected mice by two orally-administered interferon inducers (1973)
    Springer
    Archives of virology 42 (1973), S. 102-105 
    Details
    ISSN: 1432-8798
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01250512
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    Paper (German National Licenses)
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  • 20
    Electronic Resource
    Electronic Resource
    Microbial Biomass and Community Structure in a Sequence of Soils with Increasing Fertility and Changing Land Use (2000)
    Springer
    Microbial ecology 40 (2000), S. 223-237 
    Details
    ISSN: 1432-184X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The microbial biomass and community structure of eight Chinese red soils with different fertility and land use history was investigated. Two community based microbiological measurements, namely, community level physiological profiling (CLPP) using Biolog sole C source utilization tests and phospholipid fatty acid (PLFA) profiles, were used to investigate the microbial ecology of these soils and to determine how land use alters microbial community structure. Microbial biomass-C and total PLFAs were closely correlated to organic carbon and total nitrogen, indicating that these soil microbial measures are potentially good indices of soil fertility in these highly weathered soils. Metabolic quotients and C source utilization were not correlated with organic carbon or microbial biomass. Multivariate analysis of sole carbon source utilization patterns and PLFAs demonstrated that land use history and plant cover type had a significant impact on microbial community structure. PLFAs showed these differences more than CLPP methods. Consequently, PLFA analysis was a better method for assessing broad-spectrum community differences and at the same time attempting to correlate changes with soil fertility. Soils from tea orchards were particularly distinctive in their CLPP. A modified CLPP method, using absorbance readings at 405 nm and different culture media at pH values of 4.7 and 7.0, showed that the discrimination obtained can be influenced by the culture conditions. This method was used to show that the distinctive microbial community structure in tea orchard soils was not, however, due to differences in pH alone.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/s002480000053
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    Paper (German National Licenses)
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