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  • 1
    ISSN: 1365-3040
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: White clover (Trifolium repens L.) is experiencing increased levels of ultraviolet-B (UV-B) radiation in temperate pastures due to the depletion of the stratospheric ozone layer. Based on 17 morphological, morphogenetic and physiological attributes, this study analysed the consequences of enhanced UV-B on 26 white clover populations using principal components analysis (PCA). After 18 d of exposure to 13·3 kJ m−2 d−1 UV-B in controlled environments, UV-B significantly decreased above-ground and below-ground plant growth attributes, epidermal cell surface area and maximum quantum efficiency of photosystem II photochemistry (Fv/Fm). Aspects of cell division and cell expansion both were negatively affected by UV-B. Stomatal density, specific leaf mass, root-to-shoot ratio and levels of UV-B-absorbing compounds increased in response to UV-B. In the multivariate analysis, the main dimension of UV-B sensitivity was characterized by changes in plant growth attributes. Alterations in partitioning within and between plant organs constituted a secondary tier of UV-B responsiveness. Plant characteristics related to UV-B tolerance included lower growth rate, smaller epidermal cell surface area and higher UV-B-induced levels of UV-B-absorbing compounds. The results suggest overall UV-B tolerance for slower-growing populations from less productive habitats with higher natural UV-B irradiance.
    Materialart: Digitale Medien
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  • 2
    ISSN: 1365-3040
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Biologie
    Notizen: This study used comparisons across nine populations of Trifolium repens (white clover) in conjunction with drought to examine physiological responses to ultraviolet-B radiation (UV-B). Plants were exposed for 12 weeks to supplementation with 13.3 kJ m−2 d−1 UV-B, accompanied by 4 weeks of drought under controlled environmental conditions. UV-B increased the levels of UV-B-absorbing compounds and of flavonol glycosides and this effect was synergistically enhanced by water stress. These changes were more pronounced for the ortho-dihydroxylated quercetin, rather than the monohydroxylated kaempferol glycosides. UV-B increased leaf water potential (ψL) by 16% under drought and proline levels by 23% under well-watered conditions. The intraspecific comparisons showed that higher UV-B-induced levels of UV-B-absorbing compounds, of quercetin glycosides and of ψL were linked to lower plant productivity and to higher UV-B tolerance under well-watered conditions. These findings suggest that: (1) slow-growing T. repens ecotypes adapted to other stresses have higher capacity for physiological acclimation to UV-B; and (2) that these attributes also contribute to decreased UV-B sensitivity under drought.
    Materialart: Digitale Medien
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  • 3
    Digitale Medien
    Digitale Medien
    New York : Cambridge University Press
    Studies in second language acquisition 13 (1991), S. 408-409 
    ISSN: 0272-2631
    Quelle: Cambridge Journals Digital Archives
    Thema: Allgemeine und vergleichende Sprach- und Literaturwissenschaft. Indogermanistik. Außereuropäische Sprachen und Literaturen
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 4
    Digitale Medien
    Digitale Medien
    New York : Cambridge University Press
    Studies in second language acquisition 14 (1992), S. 482-483 
    ISSN: 0272-2631
    Quelle: Cambridge Journals Digital Archives
    Thema: Allgemeine und vergleichende Sprach- und Literaturwissenschaft. Indogermanistik. Außereuropäische Sprachen und Literaturen
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 5
    Digitale Medien
    Digitale Medien
    New York : Cambridge University Press
    Studies in second language acquisition 12 (1990), S. 88-90 
    ISSN: 0272-2631
    Quelle: Cambridge Journals Digital Archives
    Thema: Allgemeine und vergleichende Sprach- und Literaturwissenschaft. Indogermanistik. Außereuropäische Sprachen und Literaturen
    Materialart: Digitale Medien
    Bibliothek Standort Signatur Band/Heft/Jahr Verfügbarkeit
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  • 6
    ISSN: 1600-051X
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: To investigate whether the choice of calcium channel blocker, used in conjunction with cyclosporin A, affected the prevalence of gingival overgrowth.Method: A cohort of 135 renal transplant recipients who had been medicated with cyclosporin A in combination with either nifedipine (89) or amlodipine (46) since transplant, took part in the study. The inclusion criteria were that eligible subjects had been in receipt of a kidney transplant for at least 12 months, had at least 10 teeth and had not received specialist periodontal treatment. The age, gender, current drug regimen and dosage were recorded for each participant and alginate impressions taken of both arches. The presence and severity of gingival overgrowth were scored from plaster models.Results: A higher proportion (72%) of the amlodipine group were categorised as having gingival overgrowth compared with only 53% of the nifedipine group, χ2=4.5, p〈0.05. Logistic regression analysis was used to explore the relationship between the presence or absence of gingival overgrowth (dependent variable) and age, gender, time since transplant, dose of cyclosporin A, centre in which the patient was treated, and the calcium channel blocker used (independent variables). Independent predictors of gingival overgrowth in this multivariate analysis were whether the individual was treated with amlodipine or nifedipine (p=0.01) and whether the individual was young or old (p=0.01). Within the multivariate analysis, the odds ratio for amlodipine to be associated with gingival overgrowth compared with nifedipine was 3.0 (confidence interval 1.3–6.9).Conclusions: The prevalence of gingival overgrowth in renal transplant recipients maintained on cyclosporin A and nifedipine is lower than those treated with cyclosporin A and amlodipine.
    Materialart: Digitale Medien
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  • 7
    ISSN: 1600-051X
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Medizin
    Notizen: Background: Unsightly gingival overgrowth affects many individuals immunosuppressed with cyclosporin A (CsA). Current management involves repeated periodontal surgery and intensive hygienist support. Tacrolimus is an effective alternative immunosuppressive agent for renal transplantation which does not appear to produce gingival enlargement.〈section xml:id="abs1-2"〉〈title type="main"〉Aims:The purpose of the present study was to monitor the gingival response of 4 renal transplant patients (RTPs), with clinically significant CsA-induced gingival overgrowth, after their immunosuppressive therapy was switched to tacrolimus.Methods: Intra-oral photographs and alginate impressions were taken both prior to the drug conversion and again, 6 to 9 months later. Gingival overgrowth scores were determined, from plaster models on both these occasions.Results: All of the RTPs experienced significant resolution of their gingival enlargement within the time period studied; however, only one had complete regression.Conclusion: It is concluded that conversion of RTPs with gingival overgrowth from CsA to tacrolimus may provide an effective management strategy for this clinical problem.
    Materialart: Digitale Medien
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  • 8
    Digitale Medien
    Digitale Medien
    Cambridge : Cambridge University Press
    The @classical review 44 (1994), S. 129-130 
    ISSN: 0009-840X
    Quelle: Cambridge Journals Digital Archives
    Thema: Klassische Philologie, Byzantinistik, Mittellateinische und Neugriechische Philologie, Neulatein
    Materialart: Digitale Medien
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  • 9
    Digitale Medien
    Digitale Medien
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 67 (2002), S. 0 
    ISSN: 1750-3841
    Quelle: Blackwell Publishing Journal Backfiles 1879-2005
    Thema: Land- und Forstwirtschaft, Gartenbau, Fischereiwirtschaft, Hauswirtschaft , Werkstoffwissenschaften, Fertigungsverfahren, Fertigung
    Notizen: : We studied the synergistic effect of surfactants on aeration characteristics and long-term stability of aerated mesophase. It was observed that bubble size and volume of air incorporated (overrun) depend to a small extent on the dynamic film tension and to a greater extent on the viscosity of the mesophase, both properties being functions of surfactant chemistry and concentration. The overrun of the aerated product decreased over time due to the diffusive transport of air to the atmosphere, leading to its destabilization. The relative rate of destabilization of the aerated mesophase (as function of surfactant composition) has been correlated with the diffusion rate of air from the bulk to the surface.
    Materialart: Digitale Medien
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  • 10
    Digitale Medien
    Digitale Medien
    Springer
    World journal of surgery 16 (1992), S. 384-388 
    ISSN: 1432-2323
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Medizin
    Beschreibung / Inhaltsverzeichnis: Résumé La mortalité par accidents de la route est de 500,000 par an dans le monde, et ne cesse d'augmenter d'année en année. Quatre pays, la Chine, l'Inde, la Russie et les Etats-Unis ont atteint le niveau de 45,000 à 50,000 morts par accident de la route par an, bien que les aspects du problème diffèrent beaucoup d'un pays complètement motorisé des autres pays, “en voie de motorisation”. Dans les pays en voie de motorisation, le taux de mortalité pour 10000 véhicles est beacoup plus élevé que dans les pays motorisés; de même, le “débit” sur le réseau routier est plus varié. Le financement de la recherche pour la réduction des accidents de la route est proportionnellement beaucoup moins favorisé que pour celle des maladies cardiaques, du cancer ou celui du SIDA. Ceci est dû, en partie, au fait que beaucoup de gouvernments considèrent et traitent le problème des accidents de la route comme un problème du transport ou de police, et non pas comme un véritable problème de santé publique. On plaide ici pour un échange des connaissances technologiques permettant de réduire le nombre d'accidents des pays complètement motorisés vers les pays en voie de motorisation.
    Kurzfassung: Resumen Las cifras de muertes por accidentes de tráfico a nivel mundial son del orden de 500,000 por ano, y en ascenso. Cuatro naciones—China, India, Rusia y los EUA—han alcanzado niveles de 45,000–50,000 muertes por año, aunque la naturaleza del problema es bien diferente en los países totalmente motorizados que en los países en vía de motorización; en los últimos las tasas de muerte por 10.000 vehículos automotores son bastante más altas que en los países motorizados, y el flujo del tráfico es mucho más variado. La investigación sobre reducción de accidentes de tráfico recibe bastante menores recursos que la investigación sobre enfermedad cardíaca, cáncer o SIDA. Se sugiere que esto se debe en parte a que los gobiernos no ven ni tratan el problema de los accidentes de tránsito como uno de salud pública, sino sólo como un problema del transporte, un problema de policía. Se plantea la necesidad de establecer mecanismos globales para la transferencia de las tecnologías relativas a la reducción de accidentes de tráfico de las naciones totalmente motorizadas a las naciones en vía de motorización.
    Notizen: Abstract Worldwide, traffic deaths are 500,000 per year and growing. Four nations, China, India, Russia, and the United States of America, have reached levels of 45,000–50,000 traffic deaths per year, although the nature of the problem is quite different in fully motorized countries from what it is in motorizing countries. In motorizing countries the death rates per 10,000 motor vehicles are much higher than in motorized countries, and also the traffic stream is much more varied. Research for the reduction of traffic injuries is funded at a proportionately much lower level than that for heart disease, cancer, or AIDS. Part of the reason for this is the failure of governments to view and to treat the problem of traffic injuries as a public health problem, but rather to view it solely as a transport problem or as a police matter. A case is made for global mechanisms for the transfer of traffic injury reducing technology from fully motorized nations to motorizing nations.
    Materialart: Digitale Medien
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