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  • 1
    Electronic Resource
    Electronic Resource
    Cambridge : Cambridge University Press
    The @classical review 44 (1994), S. 129-130 
    ISSN: 0009-840X
    Source: Cambridge Journals Digital Archives
    Topics: Classical Studies
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 175 (1955), S. 339-340 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] A consideration of some well-known facts will indicate the manner of derivation of the model. The supragranular layer is more variable than the infra-granular, both between species1 and between neighbouring cortical regions in the same species (unpublished work). The infragranular layers are ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    New York : Cambridge University Press
    Studies in second language acquisition 13 (1991), S. 408-409 
    ISSN: 0272-2631
    Source: Cambridge Journals Digital Archives
    Topics: Linguistics and Literary Studies
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    New York : Cambridge University Press
    Studies in second language acquisition 14 (1992), S. 482-483 
    ISSN: 0272-2631
    Source: Cambridge Journals Digital Archives
    Topics: Linguistics and Literary Studies
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    New York : Cambridge University Press
    Studies in second language acquisition 12 (1990), S. 88-90 
    ISSN: 0272-2631
    Source: Cambridge Journals Digital Archives
    Topics: Linguistics and Literary Studies
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    World journal of surgery 16 (1992), S. 384-388 
    ISSN: 1432-2323
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Description / Table of Contents: 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.
    Abstract: 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.
    Notes: 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.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Agroforestry systems 14 (1991), S. 99-111 
    ISSN: 1572-9680
    Keywords: fodder trees ; fruit trees ; gardens ; grazing area ; species composition ; traditional agroforestry practices ; Zimbabwe
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract Traditional agroforestry systems in the communal areas of Zimbabwe are described. There are systems centered on main fields, on home gardens, on homesites and on grazing areas. In the main fields, the major tree-related management practice is the conservation of preferred indigenous fruit trees. Fruit trees are also the focus of forestry activities around the gardens and the homesite; but here it is the planting of exotic species. In a localized area of Zimbabwe Acacia albida is important in fields. There is almost no use of tree fallows in Zimbabwe. Trees in grazing areas have numerous roles, but at present there is little knowledge about traditional management practices in these areas. In the development of agroforestry systems in Zimbabwe it is suggested that those systems designed to improve fodder production will make a significant contribution to farm productivity because of the importance of cattle in the farming system and the present fodder shortage. Interventions involving the planting of fruit trees are likely to be very successful, as there is much interest in such planting. Another area that needs to be developed is that of tree plantings to improve soil fertility.
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    Springer
    Agroforestry systems 22 (1993), S. 43-48 
    ISSN: 1572-9680
    Keywords: cattle ; crop production ; litter ; manure ; soil fertility management ; litter acquisition practices
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract A questionnaire survey of fifty-two small-scale farmers was conducted to elucidate the practices associated with acquisition and use of miombo litter. On average, a household cropped 3.7 ha of land and owned ten head of cattle. Farmers collected, on average, 0.5 t of litter per household per annum with larger amounts collected by those with more cropland and more cattle. Cattle ownership is related to quantities of litter collected and the destination of the collected litter, most of the litter being cured in cattle pens. Farmers with less area of cropland applied greater quantities of litter per hectare of cropland than did farmers with more cropland. On average, five tons per hectare per season of the manure-litter mixture is applied to crop fields with litter contributing, on average, 0.12 t/ha to the mixture. Some crops, particularly maize and fingermillet, are more likely to receive litter than other crops.
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 1572-9680
    Keywords: decomposition ; litter quality ; savannas ; soil microbiology ; soil organic matter
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Abstract An investigation into the influence of indigenous trees on soil fertility was conducted in an area of semi-arid tropical savanna in Zimbabwe on two contrasting soil types: dystrophic savanna soils (sandy soils) and eutrophic savanna soils (fine-textured soils). The study adds further support to the growing literature showing that trees have a positive influence on soil fertility. The study suggests that tree clearance, as advocated in these agropastoral systems, may not necessarily result in long-term benefits. It is argued that the primary mechanism by which soil fertility is improved is through increased litter and soil organic matter compartments under trees. The influence of trees on cation levels is greater on sandy soils than fine-textured soils because the exchange capacity of fine-textured soils is determined largely by soil texture whereas organic matter is the prime determinant of exchange capacity in sandy soils. The present study demonstrates that fertility improvement under trees is not at the expense of fertility decline in the surface soils of the zone around the tree. Leaf quality, as reflected simply in leaf C:N ratio, influences decomposition rates but the activities of termites probably confound any simple relationship. Litter quality of tree species is probably important in determining levels of soil organic matter under canopies, with higher levels under species with lower leaf quality.
    Type of Medium: Electronic Resource
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  • 10
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    Unknown
    London : Periodicals Archive Online (PAO)
    Journal of historical geography. 16:3 (1990:July) 335 
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