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  • Springer  (8)
  • 1995-1999
  • 1980-1984  (8)
  • 1940-1944
  • 1984  (8)
  • 1
    Electronic Resource
    Electronic Resource
    Springer
    European journal of nutrition 23 (1984), S. 230-236 
    ISSN: 1436-6215
    Keywords: selenium ; vegetable ; fruit ; cereals ; infant food
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Description / Table of Contents: Zusammenfassung Der Selengehalt der Nahrung weist große regionale Unterschiede auf. Nahrungsproben von Säuglings- und Kleinkinderkost aus Nordrhein-Westfalen wurden mit Hilfe der instrumentellen Neutronenaktivierungsanalyse untersucht und zeigten, daß der Selengehalt der hiesigen Gemüse und Früchte durchschnittlich etwa 5 ng/g beträgt. Nur Proben von Kartoffeln und Bananen weisen einen höheren Selengehalt auf. Bananen, importiert aus verschiedenen Gebieten der Erde, zeigen eine extrem hohe Schwankungsbreite mit Werten zwischen 4 und 164 ng Se/g. Fertiggerichte für Säuglinge und Kleinkinder haben einen der Kuhmilch vergleichbar niedrigen Selengehalt von durchschnittlich 24 ng/g. Außer Eiern enthalten nur Milchbreie und einige andere getreidehaltige Produkte mehr als 100 ng Se/g.
    Notes: Summary The selenium content of food exhibits great regional differences. Food samples of infants and young children from the North Rhine-Westphalia State in the Fed. Rep. of Germany were analysed by instrumental neutron activation analysis and showed that the average selenium content of local vegetable and fruit is below 5 ng/g wet weight. Only samples of potatoes and bananas exhibit higher selenium contents. The bananas, probably imported from different areas of the world, show an extremely high variance with values between 4 and 164 ng Se/g. Commercially available ready-for-use meals for infants or young children have a low Se content (median 24 ng/g) which is comparable to cow's milk. Besides eggs, cereals enriched with milk and some other cereal products contain more than 100 ng Se/g.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 262 (1984), S. 896-901 
    ISSN: 1435-1536
    Keywords: Reversed micelle ; poly(N5-Ω-hydroxyalkyl-L-glutamine)s ; circular dichroism measurement ; conformational transition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The molecular conformations of poly(N5-dihydroxyethylaminopropyl-L-glutamine) and poly(N5-dihydroxyethyl-L-glutamine) were investigated in reversed micelles of AOT as well as in aqueous solutions. Both poly(α-amino acid)s assume disordered structures in pure water. The conformation of poly(N5-dihydroxyethylaminopropyl-L-glutamine) transits intoα-helix in the reversed micelles as the molar ratio of water to AOT (w0=[H2O]/[AOT]) becomes smaller. A similar conformational transition was also observed in aqueous solutions when a certain amount of AOT was added. Under these conditions, however, poly(N5-dihydroxyethyl-L-glutamine) did not undergo a conformational transition intoα-helix.
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Colloid & polymer science 262 (1984), S. 727-733 
    ISSN: 1435-1536
    Keywords: Reversed micelle ; Basic poly(α-amino acid)s ; Circular dichroism measurement ; Conformational transition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The conformation of various basic poly (α-amino acid)s was investigated by CD measurements in aqueous solutions containing bis (2-ethylhexyl)sodium sulfosuccinate (AOT) as well as in the AOT reversed micelles. The addition of AOT into an aqueous solution of poly(L-lysine) induces the conformational transition from coil to ordered structure, followed by aggregation. On the other hand, poly(L-lysine) assumesΒ-structure in the reversed micelles at low wovalue (wo=[H2O]/[AOT]). Similarly to poly(L-lysine), poly(L-ornithine) takes an ordered structure in the aqueous solution containing AOT andΒ-structure in the reversed micelles. In this case, however, these ordered structures are not so stable, compared with that of poly(L-lysine). Poly(L-arginine) undergoes the conformational transition from coil to helix by addition of AOT into the aqueous solution. Further addition of AOT allows transformation intoΒ-structure. Copoly(L-lysyl-L-leucine) with 63% leucine residue was shown to take a stable helical conformation even in pure water. In the reversed micelles, however, this ordered structure is significantly changed probably because the hydrophobic interaction among the leucyl residues is lowered in the reversed micelles.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Journal of economics 44 (1984), S. 27-38 
    ISSN: 1617-7134
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Summary Welfare measures and economic index numbers are usually defined by formulae or by verbal definitions. This paper develops characterizations of some important measures and corresponding index numbers by an axiomatic approach. These results facilitate the choice between different welfare indicators, and they show the strength of assumptions like MM and RM. Indeed these properties rule out CI and yield the Hicksian measures EV and CV, and their dual counterparts, respectively. At the same time one can conclude that these measures have to be used very carefully, if one considers the limitations implied by these properties.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1617-4623
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary Heterogeneous collections of covalently-closed circular DNA (cccDNA) comprise up to 10% of the total DNA of H. halobium and four other halophilic strains (SB3, GRA, GRB and GN101) recently isolated from different sources. All of these bacteria have purple membrane, bacterioruberin and gas vacuoles as characteristic phenotypic markers. Most of the major cccDNA species of these isolates are not homologous to pHH1, the main 150 kb cccDNA of H. halobium NRC817. Only GN101 and SB3 have a cccDNA which is partly homologous to pHH1. In GN101 the homology is to the halobacterial insertion sequence ISH23 found in pHH1. In SB3 the homology is to ISH26, a new insertion sequence isolated from H. halobium NRC817 which has a size of 1,400 bp. Extensive homologies mologies exist between the minor cccDNA species in all five strains indicating that this cccDNA species is highly conserved and possibly originates from (or is part of) the chromosome. A 1.6 kb high copy number cccDNA species is present in three independently isolated GN101, GRB and SB3. This 1.6 kb cccDNA is not homologous to any other extrachromosomal or chromosomal DNA.
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  • 6
    Publication Date: 1984-09-01
    Print ISSN: 0044-264X
    Electronic ISSN: 1435-1293
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Medicine
    Published by Springer
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  • 7
    Publication Date: 1984-09-01
    Print ISSN: 0372-820X
    Electronic ISSN: 1435-1536
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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  • 8
    Publication Date: 1984-11-01
    Print ISSN: 0372-820X
    Electronic ISSN: 1435-1536
    Topics: Chemistry and Pharmacology , Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Published by Springer
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