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  • 1
    Call number: PIK N 531-01-0416 ; AWI G1-02-0031
    Type of Medium: Monograph available for loan
    Pages: XVI, 416 Seiten , Illustrationen
    ISBN: 0126312605
    Language: English
    Note: Contents: Contributors. - Foreword by Paul J. Crutzen. - Preface by David Schimel. - Introduction. - 1 Uncertainties of Global Biogeochemical Predictions / E. D. Schulze, D. S. S. Schimel. - 1.1 Introduction. - 1.2 The IGBP Transect Approach. - 1.2.1 The Patagonian Transect. - 1.2.2 The Australian Transect. - 1.2.3 The European Transect. - 1.3 Variability in Processes. - 1.4 Biome Approach and Functional Types. - 1.5 New Approaches to Functional Diversity. - 1.6 Conclusions. - References. - 2 Uncertainties of Global Climate Predictions / L. Bengtsson. - 2.1 Introduction. - 2.2 Observational Evidence. - 2.3 Physical Rationale. - 2.3.1 Stochastic Forcing. - 2.3.2 Solar irradiation Changes. - 2.3.3 Volcanic Effects. - 2.3.4 Anthropogenic Effects. - 2.4 Response to Forcing of the Climate System. - 2.5 Results from Climate Change Prediction Experiments. - 2.6 Summary and Conclusions. - References. - 3 Uncertainties in the Atmospheric Chemical System / G. P. Brasseur, E. A. H. Holland. - 3.1 Introduction. - 3.2 Synthetic View of Chemical Processes in the Troposphere. - 3.3 The IMAGES Model. - 3.4 Changes in the Chemical Composition of the Global Troposphere. - 3.5 Concluding Remarks. - References. - 4 Inferring Biogeochemical Sources and Sinks from Atmospheric Concentrations: General Consideration and Applications in Vegetation Canopies / M. Raupach. - 4.1 Introduction. - 4.2 Scalar and Isotopic Molar Balances. - 4.2.1 General Principles. - 4.2.2 Single-Point Eulerian Equations. - 4.2.3 Source Terms for CO2. - 4.2.4 Single-Point Lagrangian Equations. - 4.3 Inverse Methods for Inferring Scalar Sources and Sinks in Canopies. - 4.3.1 General Principles. - 4.3.2 Localized Near Field Theory. - 4.3.3 The Dispersion Matrix. - 4.3.4 Turbulent Velocity Field. - 4.3.5 Solutions for Forward, Inverse and Implicit Problems. - 4.3.6 Field Tests. - 4.4 Inverse Methods and Isotopes in Canopies. - 4.4.1 Path Integrals and Keeling Plots. - 4.4.2 Inverse Lagrangian Analysis of Isotopic Composition. - 4.5 Summary and Conclusions. - Appendix A. - Appendix B. - References. - 5 Biogeophysical Feedbacks and the Dynamics of Climate / M. Claussen. - 5.1 Introduction. - 5.2 Synergisms. - 5.2.1 High Northern Latitudes. - 5.2.2 Subtropics. - 5.3 Multiple Equilibria. - 5.4 Transient Interaction. - 5.5 Perspectives. - References. - 6 Land-Ocean-Atmosphere Interactions and Monsoon Climate Change: A Paleo-Perspective / J. E. Kutzbach, Michael T. Coe, S. P. Harrison and M. T. Coe. - 6.1 Introduction. - 6.2 Response of the Monsoon to Orbital Forcing. - 6.3 Ocean Feedbacks on the Monsoon. - 6.4 Land-Surface Feedbacks on the Monsoon. - 6.5 Synergies between the Land, Ocean and Atmosphere. - 6.6 The Role of Climate Variability. - 6.7 Final Remarks. - References. - 7 Paleobiogeochemistry / I. C. Prentice, D. Raynaud. - 7.1 Introduction. - 7.2 Methane. - 7.3 Carbon Dioxide. - 7.4 Mineral Dust Aerosol. - 7.5 Scientific Challenges Posed by the Ice-Core Records. - 7.5.1 Methane. - 7.5.2 Carbon Dioxide. - 7.5.3 Mineral Dust Aerosol. - 7.6 Towards an Integrated Research Strategy for Palaeobiogeochemistry. - References. - 8 Should Phosphorus Availability Be Constraining Moist Tropical Forest Responses to Increasing CO2 Concentrations / J. Lloyd, M. I. Bird, E. M. Veenendaal and B. Kruijt. - 8.1 Introduction. - 8.2 Phosphorus in the Soils of the Moist Tropics. - 8.2.1 Soil Organic Phosphorus. - 8.2.2 Soil Inorganic Phosphorus. - 8.2.3 Soil Carbon/Phosphorus Interactions. - 8.3 States and Fluxes of Phosphorus in Moist Tropical Forests. - 8.3.1 Inputs and Losses of Phosphorus Through Rainfall, Dry Deposition and Weathering: Losses Via Leaching. - 8.3.2 Internal Phosphorus Flows in Moist Tropical Forests. - 8.3.3 Mechanisms for Enhanced Phosphorus Uptake in Low P Soils. - 8.4 Linking the Phosphorus and Carbon Cycles. - 8.4.1 To What Extent Does Phosphorus Availability Really Limit Moist Tropical Forest Productivity?. - 8.4.2 Tropical Plant Responses to Increases in Atmospheric CO2 Concentrations. - 8.4.3 Using a Simple Model to Examine CO2/Phosphorus Interactions in Tropical Forests. - References. - 9 Trees in Grasslands: Biogeochemical Consequences of Woody Plant Expansion / S. Archer, T. W. Boutton and K. A. Hibbard. - 9.1 Introduction. - 9.2 Woody Plant Encroachment in Grasslands and Savannas. - 9.3 The La Copita Case Study. - 9.3.1 Biogeographical and Historal Context. - 9.3.2 Herbaceous Retrogression and Soil Carbon Losses. - 9.3.3 Woody Plant Encroachment and Ecosystem Biogeochemistry. - 9.4 Degradation: Ecological Versus Socioeconomic. - 9.5 Implications for Ecosystem and Natural Resources Management. - 9.6 Summary. - References. - 10 Biogeochemistry in the Arctic: Patterns, Processes and Controls / S. Jonasson, F.S. Chapin, III and G. R. Shaver. - 10.1 Introduction. - 10.2 Tundra Organic Matter. - 10.2.1 Distribution of Organic Matter. - 10.2.2 Patterns and Controls of Organic Matter Turnover between Ecosystem Types. - 10.3 Tundra Nutrients. - 10.3.1 Nutrient Distribution and Controls of Nutrient Cycling. - 10.3.2 Nutrient Mineralization and Plant Nutrient Uptake. - 10.3.3 Are there Unaccounted Plant Sources of Limiting Nutrients?. - 10.4 Biogeochemical Responses to Experimental Ecosystem Manipulations. - 10.4.1 Applicability of Experimental Manipulations. - 10.4.2 Responses to Water Applications. - 10.4.3 Response to Nutrient Addition and Warming. - 10.4.4 Responses in Ecosystem Carbon Balance. - 10.5 Summary. - References. - 11 Evaporation in the Boreal Zone During Summer - Physics and Vegetation / F. M. Kelliher, I. Lloyd, C. Rebmann, C. Wirth and E. D. Schulze, D. D. Baldocchi. - 11.1 Introduction. - 11.2 Climate and Soil Water. - 11.3 Evaporation Theory. - 11.4 Evaporation During Summer and Rainfall. - 11.5 Forest Evaporation, Tree Life Form and Nitrogen. - 11.6 Conclusions. - References. - 12 Past and Future Forest Response to Rapid Climate Change / M.B. Davis. - 12.1 Introduction. - 12.2 Long-Distance Dispersal. - 12.3 Estimating Jump Distances. - 12.4 Interactions with Resident Vegetation - Constraints on Establishment. - 12.5 Interactions with Resident Vegetation - Competition for Light and Resulting Constraints on Population Growth. - 12.6 Conclusions. - References. - 13 Biogeochemical Models: Implicit vs. Explicit Microbiology / J. Schimel. - 13.1 Introduction. - 13.2 Microbiology in Biogeochemical Models. - 13.3 Dealing with Microbial Diversity in Models. - 13.4 Kinetic Effects of Microbial Population Size. - 13.5 Microbial Recovery from Stress. - 13.6 Conclusions. - References. - 14 The Global Soil Organic Carbon Pool / M. I. Bird, H. Santruckova, J. Lloyd and E. M. Veenendaal. - 14.1 Introduction: the Soil Carbon Pool and Global Change. - 14.2 Factors Affecting the Distribution of Soil Organic Carbon. - 14.3 Global Variations in the SOC Pool. - 14.4 The Limitations of Available Observational SOC Data. - 14.5 A Stratified Sampling Approach. - 14.6 Conclusions: Sandworld and Clayworld. - References. - 15 Plant Compounds and Their Turnover and Stability as Soil Organic Matter / G. Gleixner, C. Czimczik, C. Kramer, B. M. Lühker and M. W. I. Schmidt. - 15.1 Introduction. - 15.2 Pathways of Soil Organic Matter Formation. - 15.2.1 Formation and Decomposition of Biomass. - 15.2.2 The Influence of Environmental Conditions on SOM Formation. - 15.2.3 For
    Location: A 18 - must be ordered
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  • 2
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 592 (1990), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
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  • 3
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] The contamination of ground waters, abstracted for drinking and irrigation, by sediment-derived arsenic threatens the health of tens of millions of people worldwide, most notably in Bangladesh and West Bengal. Despite the calamitous effects on human health arising from the extensive use of ...
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  • 4
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    FEMS microbiology reviews 27 (2003), S. 0 
    ISSN: 1574-6976
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: The microbial reduction of metals has attracted recent interest as these transformations can play crucial roles in the cycling of both inorganic and organic species in a range of environments and, if harnessed, may offer the basis for a wide range of innovative biotechnological processes. Under certain conditions, however, microbial metal reduction can also mobilise toxic metals with potentially calamitous effects on human health. This review focuses on recent research on the reduction of a wide range of metals including Fe(III), Mn(IV) and other more toxic metals such as Cr(VI), Hg(II), Co(III), Pd(II), Au(III), Ag(I), Mo(VI) and V(V). The reduction of metalloids including As(V) and Se(VI) and radionuclides including U(VI), Np(V) and Tc(VII) is also reviewed. Rapid advances over the last decade have resulted in a detailed understanding of some of these transformations at a molecular level. Where known, the mechanisms of metal reduction are discussed, alongside the environmental impact of such transformations and possible biotechnological applications that could utilise these activities.
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  • 5
    Electronic Resource
    Electronic Resource
    New York, NY [u.a.] : Wiley-Blackwell
    Microscopy Research and Technique 25 (1993), S. 40-45 
    ISSN: 1059-910X
    Keywords: Reverse hemolytic plaque ; In situ hybridization ; mRNA ; Pituitary lactotroph ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Natural Sciences in General
    Notes: We have developed an assay that allows one to monitor gene expression in and peptide secretion from individual cells. By combining the reverse hemolytic plaque with in situ hybridization, investigators can quantitate simultaneously the level of gene expression and the level of secretion of a peptide. The method can be used in any system in which an appropriate antibody for the reverse hemolytic plaque assay and probes complementary to the mRNA of interest are available. It can be used to monitor the level of mRNA and secretion of the peptide product, or expression of one gene and the secretion of another peptide. In this paper we will describe the major steps of the method. We have used the pituitary lactotroph as a model to demonstrate the power of this technique. However, we believe that this method may be an important approach to answer many questions regarding the cellular and molecular mechanisms that regulate the coupling of peptide secretion and gene expression at the single cell level. © 1993 Wiley-Liss, Inc.
    Additional Material: 2 Ill.
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  • 6
    ISSN: 0741-0581
    Keywords: Affinity cytochemical studies ; Specific target cells ; GnRH ; CRH ; AVP ; Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Natural Sciences in General
    Notes: Hypothalamic regulatory peptides bind to specific receptors on target cells in the pituitary and control secretion. They in turn can be regulated at the pituitary level by steroid and peptide modulators. Affinity cytochemical techniques are important tools for the identification of specific target binding sites for these regulatory peptides. This presentation reviews the work in which potent, biotinylated ligands of gonadotropin releasing hormone (bio-GnRH), corticotropin releasing hormone (bio-CRH), and arginine vasopressin (bio-AVP) were applied to study the target cell responses. Bio-GnRH, bio-CRH, and bio-AVP bind to membrane receptors on specific anterior pituitary cells. Dual labeling for either gonadotropin or adrenocorticotropin (ACTH) antigens further identified the target cells. After 1-3 minutes, the label was in patches or capped on the surface. After 3 minutes, it was internalized in small vesicles and sent to receptosomes and vacuoles in the Golgi complex. Eventually the biotinylated peptides, or a metabolite, was found in the lysosomes (multivesicular bodies) and a subpopulation of secretory granules. The route and rate of uptake was similar to that described for the classical receptor-mediated endocytosis process. In contrast, intermediate lobe corticotropes internalized the bio-CRH in less than 1 minute. The route through the Golgi complex appeared to be bypassed. Instead the labeled peptide was in vesicles, on the membranes of scattered vacuoles, and in multivesicular bodies.Modulation of ligand binding by steroids showed that changes in receptor numbers correlated with changes in the number of cells that bound the ligand. In male rats, dihydrotestosterone reduced the percentage of GnRH-bound cells by 50%. Most of the reduction appeared in cells that stored luteinizing hormone (LH) antigens. In diestrous female rats, estradiol increased the percentage of bio-GnRH-bound cells. However, the steroid decreased the percentage of GnRH-bound cells in cells from proestrous rats. Glucocorticoids decreased the percentage of CRH-bound corticotropes in as little as 10 minutes.Potentiation of secretion by these ligands was correlated with increases in the percentage of ligand-bound cells. AVP pretreatment of corticotropes increased the percentage of cells that bound bio-CRH. It also increased the rate of receptor-mediated endocytosis of CRH and changed the route so that the Golgi complex was bypassed. This effect could be mimicked by activation of its second messengers (calcium and protein kinase C). Similarly, CRH pretreatment increased the percentage of corticotropes that bound AVP. Thyrotropin releasing hormone (TRH) pretreatment also increased the percentage of thyrotropes that bound AVP. Finally, calcium or sodium channel blockers altered CRH binding so that fewer cells were labeled. This binding by CRH was not dependent on extracellular calcium and tests with a calcium channel agonist showed that it was related to activation of calcium channels. To summarize, these affinity cytochemical studies have identified specific target cells in the pituitary for GnRH, CRH, and AVP. They have also identified heterogeneity in the population. They have demonstrated new information about the direct modulatory effects of steroids, ion channels, and neuropeptides on neuropeptide binding by subpopulations of these target cells.
    Additional Material: 28 Ill.
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  • 7
  • 8
    Publication Date: 2017-11-10
    Electronic ISSN: 2161-5063
    Topics: Biology , Chemistry and Pharmacology
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  • 9
    Publication Date: 2010-04-01
    Print ISSN: 0013-936X
    Electronic ISSN: 1520-5851
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
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  • 10
    Publication Date: 2008-03-01
    Print ISSN: 0013-936X
    Electronic ISSN: 1520-5851
    Topics: Chemistry and Pharmacology , Energy, Environment Protection, Nuclear Power Engineering
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