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  • Bücher
  • Artikel  (27)
  • Springer  (27)
  • 1975-1979  (27)
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  • Bücher
  • Artikel  (27)
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  • 1
    Digitale Medien
    Digitale Medien
    Springer
    The journal of membrane biology 39 (1978), S. 49-56 
    ISSN: 1432-1424
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Chemie und Pharmazie
    Notizen: Summary Polymyxin B (PX) does not penetrate phospholipid monolayers and bilayers at low field strength across the lipid layers. The degree of penetration of PX is evaluated from its effect on the capacitance of the monolayers and on the conductance of the bilayers. PX added to one side of a bilayer causes its destabilization, it also enhances destabilization of lipid monolayers at positive electric fields across the surface layer in the direction of the adsorbed PX. PX lowers very little the fluorescence polarization of 1,6-diphenyl 1,3,5 hexatriene embedded in phospholipid vesicles. It is suggested that the penetration mechanism of PX into gram-negative bacteria is based on transient local breakdown of the plasma membrane.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 2
    Digitale Medien
    Digitale Medien
    Springer
    Cellular and molecular life sciences 34 (1978), S. 688-688 
    ISSN: 1420-9071
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary The aqueous ethanolic extract of 2 related marine spongesHaliclona sp. andChalinopsilla sp. displayed antidermatophyte activities specific forTrichophyton mentagrophytes. The active consituent of both sponges was isolated and shown to be L-azetidine-2-carboxylic acid.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 3
    Digitale Medien
    Digitale Medien
    Springer
    Cellular and molecular life sciences 35 (1979), S. 750-751 
    ISSN: 1420-9071
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Differential scanning calorimetry thermograms of native chromaffin granule membranes exhibit several peaks in the 15–35°C region. Extraction of cholesterol increases the size of the melting peaks. Addition of Ca2+ ions does not seem to influence the lipid transitions.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    Springer
    Communications in mathematical physics 60 (1978), S. 153-170 
    ISSN: 1432-0916
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Mathematik , Physik
    Notizen: Abstract By application of the Girsanov formula for measures induced by diffusion processes with constant diffusion coefficients it is possible to define the Onsager-Machlup function as the Lagrangian for the most probable tube around a differentiable function. The absolute continuity of a measure induced by a process with process depending diffusion w.r.t. a quasi translation invariant measure is investigated. The orthogonality of these measures w.r.t. quasi translation invariant measures is shown. It is concluded that the Onsager-Machlup function cannot be defined as a Lagrangian for processes with process depending diffusion coefficients.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    Springer
    Bulletin of environmental contamination and toxicology 21 (1979), S. 498-501 
    ISSN: 1432-0800
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Energietechnik , Medizin
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 6
    Digitale Medien
    Digitale Medien
    Springer
    Cellular and molecular life sciences 34 (1978), S. 717-718 
    ISSN: 1420-9071
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie , Medizin
    Notizen: Summary Differential scanning calorimetry was employed for studying rat liver mitochondria and extracted mitochondrial lipids. Endothermic transition in the range 15–40°C was detected for the whole mitochondria and between 10–20°C for the extracted lipids.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 7
    Digitale Medien
    Digitale Medien
    Springer
    Oecologia 44 (1979), S. 319-326 
    ISSN: 1432-1939
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Biologie
    Notizen: Summary Experimental field plantings showed that plant diversity strongly affected the population dynamics of a specialist herbivore, the striped cucumber beetle, Acalymma vittata (Fab.) (Coleoptera: Chrysomelidae). Population densities over time were characterized by two peaks in numbers (from colonization and reproduction, respectively) and were consistently higher in cucumber monocultures (Cucumis sativus L.) than in polycultures of cucumbers, corn (Zea mays L.), and broccoli (Brassica oleracea L.). Greater abundances in monocultures appear to result from two factors: (1) per individual reproductive rates were greater in monocultures than in polycultures, and (2) mark-recapture studies confirmed that beetles stay in monocultures for a longer period of time than in polycultures. Differences in predation did not appear to contribute to the overall differences in herbivore abundances. The primary impact of A. vittata on its host plant, C. sativus, is the dissemination of bacterial wilt disease, Erwinia tracheiphila (E.F.Sm.). Greater numbers of beetles led to greater plant mortality in monocultures. It is suggested that factors other than numbers of beetles (e.g., shading, allelopathy, microclimate) are more important in influencing plant reproduction, since cucumber plants in monocultures had greater yields than did plants grown in polycultures. However, time of beetle colonization strongly affected plant parameters, indicating that the length of time during which herbivores are interacting with plants is of critical importance to plant survivorship, and thus reproduction.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 8
    Digitale Medien
    Digitale Medien
    Springer
    The European physical journal 22 (1975), S. 189-192 
    ISSN: 1434-6036
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract Using Ito stochastic differential equations to describe stochastic processes the Onsager-Machlup Function of a nonlinear diffusion process is calculated. It is shown that for two examples the Onsager-Machlup Function calculated directly as limit of finite dimensional probability densities agrees with the formula derived by using the Ito calculus but differs from a formula given by Graham who used the concept of Langevin equations.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 9
    Digitale Medien
    Digitale Medien
    Springer
    European journal of nutrition 14 (1975), S. 84-93 
    ISSN: 1436-6215
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Medizin
    Beschreibung / Inhaltsverzeichnis: Zusammenfassung Die mittelkettigen Triglyceride (MCT) (Fettsäuren von 6 bis 12 C) sind schneller absorbiert als die langkettigen Triglyceride. In der Leber werden die mittelkettigen Fettsäuren nicht in Triglyceride eingegliedert, sondern oxydiert. Wenn MCT allein verabreicht werden, bilden sie große Mengen Ketonkörper. Die MCT sind aber von großem Interesse in der Diätetik zahlreicher Erkrankungen des Verdauungsapparates: Sind die gewöhnlichen langkettigen Fette nicht toleriert, so können sie von den MCT mit Erfolg ersetzt werden.
    Kurzfassung: Summary Medium chain triglycerides (MCT) (fatty acids with 6–12 C) are absorbed more quickly than long chain triglycerides. Medium chain fatty acids are not incorporated into hepatic triglycerides, but oxidized. If MCT are given alone, they stimulate ketogenesis. Nevertheless MCT are of great interest in the diet of numerous affections of the digestive tract. When long chain triglycerides are not tolerated, MCT can replace them with efficiency.
    Notizen: Résumé Les triglycérides à chaînes moyennes (MCT) (acides gras à 6–12 C) sont absorbés plus vite que les graisses à chaînes longues. Les acides gras moyens n'entrent pas dans la synthèse de triglycérides hépatiques, mais sont oxydés. Si les MCT sont fournis seuls, ils sont très cétogènes. Ils présentent cependant un intérêt considérable dans la diététique de nombreuses affections du tube digestif. Si les graisses habituelles à chaînes longues ne sont pas tolérées, elles peuvent être remplacées efficacement par les MCT.
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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  • 10
    Digitale Medien
    Digitale Medien
    Springer
    Colloid & polymer science 255 (1977), S. 812-812 
    ISSN: 1435-1536
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Chemie und Pharmazie , Maschinenbau
    Materialart: Digitale Medien
    Standort Signatur Erwartet Verfügbarkeit
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