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  • 1
    Unknown
    New York : Liss
    Call number: QZ365WI435:99
    Keywords: Adenomatous Polyposis Coli ; Precancerous Conditions ; Genetic Screening
    Notes: Includes index.
    Pages: xx, 402 p. : ill.
    ISBN: 9780471562252
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  • 2
    Keywords: Medicine ; Internal Medicine ; Nephrology ; Pathology ; Medicine & Public Health ; Pathology ; Nephrology ; Internal Medicine ; Springer eBooks
    Edition: 2012.
    ISBN: 9781607613893
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  • 3
    Keywords: Life sciences ; Animal ecology ; Conservation biology ; Wildlife management ; Life sciences ; Conservation Biology/Ecology ; Animal ecology ; Fish & Wildlife Biology & Management ; Springer eBooks
    Description / Table of Contents: Foreword -- Preface -- Part I: Biology, Ecology and Evolution -- Taxonomy, natural history and distribution of the capybara -- Paleontology, evolution and systematics of capybara -- Phylogenetics of Caviomorph rodents and genetic perspectives on the evolution of sociality and mating systems in the Caviidae -- Foraging strategies and feeding habits of capybaras -- Capybara digestive adaptations -- Reproductive morphology and physiology of the male capybara -- Morphology and reproductive physiology of female capybaras -- Capybara demographic traits -- Diseases of capybara -- Capybara scent glands and scent-marking behavior -- Capybara social behavior and use of space: patterns and processes -- Part II: Production -- Products and uses of capybaras -- Confined and semi-confined production systems for capybaras -- Social and spatial relationships of capybaras in a semi-confined production system -- Feeds and nutrition of farmed capybaras -- The impact of management practices on female capybara reproductive parameters in captivity -- The sustainable management of capybaras -- Part III: Conservation -- Capybaras as a source of protein: utilization and management in Venezuela -- Conservation and use of the capybara and the lesser capybara in Colombia -- Capybara production in Brazil: captive breeding or sustainable management? -- Capybaras use in Argentina -- Counting capybaras -- Brazilian spotted fever: the role of capybaras -- The capybara paradigm:℗ from sociality to sustainability -- Index
    Abstract: Capybaras are not merely unusual, they are extraordinary. It is widely known that they are the largest living rodent (〈i〉c〈/i〉. 50kg), but it is less well known that their biology is exceptional in many other regards, as documented in this book, 〈i〉Capybara: Biology, Use and Conservation of an Exceptional Neotropical Species〈/i〉. With a suit of adaptations to a semi-aquatic lifestyle, and a remarkable social system, the capybara is the South American ecological equivalent of the medium-sized ungulates of Africa. Their size, adaptations and habitat make them fascinating in their own right, and a revealing model for studies of the evolution of animal societies. Furthermore, from prehistory to the present day they have been hunted for their meat and skins, and nowadays they are both farmed and harvested, which makes them an illuminating case study for discussions of sustainable use. This blend of attributes makes the capybara a focus of specialist interest and a source of general principles, and these two ends of the readership spectrum are both encompassed by the extraordinary international team of 36 authors that have contributed the 24 inter-disciplinary chapters of this book. Written in an accessible style that will satisfy generalists, practitioners and specialists alike, this book represents the compendious €˜óne-stop-shoṕ€™ that will be the benchmark publication on capybaras and on neotropical wildlife management for years to come
    Pages: XVII, 419 p. 140 illus., 17 illus. in color. : digital.
    ISBN: 9781461440000
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  • 4
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Resume On a étudié quelques facteurs liés à la consommation du nectar chez les fourmis dans un échantillon de 75 espèces de plantes du sud de l'Espagne qui sont pollinisées par des insectes et qui produisent du nectar. Les fourmis exploitent le nectar de façon opportuniste. La variation entre les espèces de plantes en ce qui concerne le taux de sécrétion de nectar et la localisation des fleurs par rapport au sol n'a pas d'incidence, pas plus que la possibilité de visite par les fourmis ni l'identité des espèces enregistrées. Les restrictions mécaniques à l'accessibilité du nectar (corolles tubulaires, structures fermées) diminuent la consommation de nectar par les fourmis. Quelques tendances évolutives dans la morphologie florale, habituellement liées à une augmentation de la spécificité des pollinisateurs, peuvent être interprétées simultanément en termes de meilleure adaptation des plantes pour exclure des insectes non pollinisateurs qui profitent du nectar.
    Notes: Summary Correlates of ant nectarivory have been investigated in a sample of 75 insect-pollinated, nectar-producing southern Spanish plant species. Ants exploit floral nectar opportunistically. Variation among plant species in sugar secretion rates and flower location relative to ground level do not influence either the chances of ant visitation or the identity of ant species involved. Mechanical restrictions on nectar accessibility (tubular corollas, occlusive structures) decrease nectar thievery, Some evolutionary trends in floral morphology usually related to a decrease in the range of effective pollinators alone may simultaneously be interpreted in terms of increased plant adaptedness to exclude non-pollinating insect nectarivores.
    Type of Medium: Electronic Resource
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  • 5
    ISSN: 1617-4623
    Keywords: Key wordsUstilago maydis ; Zea mays ; Corn smut ; Meiosis ; Cell cycle
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The heterobasidiomycetes responsible for plant smuts obligatorily require their hosts for the completion of the sexual cycle. Accordingly, the sexual cycle of these fungi could so far be studied only by infecting host plants. We have now induced Ustilago maydis, the causative agent of corn smut, to traverse the whole life cycle by growing mixtures of mating-compatible strains of the fungus on a porous membrane placed on top of embryogenic cell cultures of its host Zea mays. Under these conditions, mating, karyogamy and meiosis take place, and the fungus induces differentiation of the plant cells. These results suggest that embryogenic maize cells produce diffusible compounds needed for completion of the sexual cycle of U. maydis, as the plant does for the pathogen during infection.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1399-3054
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: To investigate the possible induction of Crassulacean acid metabolism (CAM) by drought in Talinum paniculatum ([Jacq.] Gaertn.), a deciduous herb with succulent leaves and lignified stems, nocturnal acid accumulation and CO2-exchange were studied in watered and droughted greenhouse-grown plants. Watered plants had a typical C3 pattern of CO2-exchange. When plants were subjected to drought, nocturnal acid accumulation increased significantly from 0.9 to 13.4 μmol H+ cm−2 after 21 days. Water deficit provoked a rapid reduction of daytime CO2 assimilation of as much as 92% and a slower increase in night-time fixation. A maximum of 24% of the diel carbon gain was contributed by dark fixation in droughted plants. After 34 days of drought, only CO2 compensation and a small accumulation of acid (idling) was detected during the night. Relative recycling of respiratory CO2 was approximately 100% for most of the water deficit treatment, the amount of CO2 recycled showing a high positive correlation with nocturnal acid accumulation. A low rate of nocturnal loss of CO2 in watered plants did not explain the amount recycled nightly in droughted plants, implying that respiration increased with drought. Leaf lamina area was reduced by 49% during drought due to rolling. Leaf biomass remained unchanged during the water-deficit treatment. Neither apparent quantum yield nor light-saturated photosynthetic rate differed significantly between control and 14-day water-stressed plants rewatered for 20 h. Chlorophyll content did not change with drought. These results confirm that CAM is induced by drought in T. paniculatum; the carbon acquired through this pathway only contributes to maintain, but not to increase, leaf biomass; also, CAM is responsible for a high recycling of respiratory CO2 during the night. Recycling through CAM, plus the reduction of exposed leaf area during drought, may help explain the maintenance of chlorophyll, quantum yield and saturated photosynthetic rates in water-stressed plants of T. paniculatum.
    Type of Medium: Electronic Resource
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  • 7
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Divergence between two eastern Pacific forms of Triphoturus, currently considered to belong to the same species was tested by DNA sequences of the cytochrome b gene (DNA obtained from larvae collected in northern Chile and from adults in the Southern California Bight) and examination of larval characters. The number of apparently fixed substitutions (12 among 31 variable sites, out of 1001 bases) was high and the pattern of mid-lateral trunk pigmentation in larvae also differed consistently between the two forms. The results support the separate species status for T. mexicanus(North America) and T. oculeus(Central-South America).
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 0147-5975
    Keywords: Phycomyces ; chitin breakdown ; chitin synthetase ; photomecism ; phototropism ; wall structure
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 9
    ISSN: 0147-5975
    Keywords: Phycomyces ; chitin microfibrils ; chitin synthesis ; chitosomes ; sporangiophores
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Biology
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    ISSN: 0749-159X
    Keywords: Mathematics and Statistics ; Numerical Methods
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mathematics
    Notes: The localized adjoint method, when applied using an Eulerian-Lagrangian frame, has been quite successful in treating advection-dominated transport. The resulting methodology is known as ELLAM. In previous work, bilinear functions were used as test functions. In this paper, local constant functions are used instead, leading to procedures which are appealing because, in addition to other advantages of ELLAM methods, they ensure local mass conservation, are easy to apply and can be combined without difficulty with existing solute-transport codes which are based on finite volumes. In addition, the procedures for deriving the algorithms presented here are used as an illustration of a general methodology for treating numerically partial differential equations, which is advocated by the authors. Such methodology consists in identifying the information about the sought solution which is contained in the approximate one and then using this insight to choose the interpolation procedure to be applied. © 1994 John Wiley & Sons, Inc.
    Additional Material: 2 Ill.
    Type of Medium: Electronic Resource
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