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  • 1
    Online Resource
    Online Resource
    San Diego :Elsevier Science & Technology,
    Keywords: Ecology. ; Nature -- Effect of human beings on. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (289 pages)
    Edition: 1st ed.
    ISBN: 9780080497396
    Language: English
    Note: Front cover -- A New Ecology: Systems Perspective -- Copyright page -- Contents -- Preface -- Chapter 1. Introduction: A New Ecology is Needed -- 1.1 Environmental Management has Changed -- 1.2 Ecology is Changing -- 1.3 Book Outline -- Chapter 2. Ecosystems have Openness (thermodynamic) -- 2.1 Why must Ecosystems be open? -- 2.2 An Isolated System would die (Maximum Entropy) -- 2.3 Physical Openness -- 2.4 The Second Law of Thermodynamics Interpreted for Open Systems -- 2.5 Dissipative Structure -- 2.6 Quantification of Openness and Allometric Principles -- 2.7 The Cell -- 2.8 What about the Environment? -- 2.9 Conclusion -- Chapter 3. Ecosystems have Ontic Openness -- 3.1 Introduction -- 3.2 Why is Ontic Openness so Obscure? -- 3.3 Ontic Openness and the Physical World -- 3.4 Ontic Openness and Relative Stability -- 3.5 The Macroscopic Openness: Connections to Thermodynamics -- 3.6 Ontic Openness and Emergence -- 3.7 Ontic Openness and Hierarchies -- 3.8 Consequences of Ontic Openness: A Tentative Conclusion -- Chapter 4. Ecosystems have Directionality -- 4.1 Since the Beginnings of Ecology -- 4.2 The Challenge from Thermodynamics -- 4.3 Deconstructing Directionality? -- 4.4 Agencies Imparting Directionality -- 4.5 Origins of Evolutionary Drive -- 4.6 Quantifying Directionality in Ecosystems -- 4.7 Demystifying Darwin -- 4.8 Directionality in Evolution? -- 4.9 Summary -- Chapter 5. Ecosystems have Connectivity -- 5.1 Introduction -- 5.2 Ecosystems as Networks -- 5.3 Food Webs -- 5.4 Systems Analysis -- 5.5 Ecosystem Connectivity and Ecological Network Analysis -- 5.6 Network Environ Analysis Primer -- 5.7 Summary of the Major Insights Cardinal Hypotheses (CH) from Network Environ Analysis -- 5.8 Conclusions -- Chapter 6. Ecosystems have Complex Dynamics (Growth and Development) -- 6.1 Variability in Life Conditions -- 6.2 Ecosystem Development. , 6.3 Orientors and Succession Theories -- 6.4 The Maximum Power Principle -- 6.5 Exergy, Ascendency, Gradients, and Ecosystem Development -- 6.6 Support for the Presented Hypotheses -- 6.7 Toward a Consistent Ecosystem Theory -- 6.8 Exergy Balances for the Utilization of Solar Radiation -- 6.9 Summary and Conclusions -- Chapter 7. Ecosystems have Complex Dynamics - Disturbance and Decay -- 7.1 The Normality of Disturbance -- 7.2 The Risk of Orientor Optimization -- 7.3 The Characteristics of Disturbance -- 7.4 Adaptability as a Key Function of Ecosystem Dynamics -- 7.5 Adaptive Cycles on Multiple Scales -- 7.6 A Case Study: Human Disturbance and Retrogressive Dynamics -- 7.7 Summary and Conclusions -- Chapter 8. Ecosystem Principles have Broad Explanatory Power in Ecology -- 8.1 Introduction -- 8.2 Do Ecological Principles Encompass other Proposed Ecological Theories?: Evolutionary Theory -- 8.3 Do Ecological Principles Encompass other Proposed Ecological Theories?: Island Biogeography -- 8.4 Do Ecological Principles Encompass other Proposed Ecological Theories?: Latitudinal Gradients in Biodiversity -- 8.5 Do Ecological Principles Encompass other Proposed Ecological Theories?: Optimal Foraging Theory -- 8.6 Do Ecological Principles Encompass other Proposed Ecological Theories?: Niche Theory -- 8.7 Do Ecological Principles Encompass other Proposed Ecological Theories?: Liebig's Law of the Minimum -- 8.8 Do Ecological Principles Encompass other Proposed Ecological Theories?: The River Continuum Concept (RCC) -- 8.9 Do Ecological Principles Encompass other Proposed Ecological Theories?: Hysteresis in Nature -- 8.10 Conclusions -- Chapter 9. Ecosystem Principles have Applications -- 9.1 Introduction -- 9.2 Entropy Production as an Indicator of Ecosystem Trophic State. , 9.3 The use of Ecological Network Analysis (ENA) for the Simulation of the Interaction of the American Black Bear and its Environment -- 9.4 Applications of Network Analysis and Ascendency to South Florida Ecosystems -- 9.5 The Application of Eco-Exergy as Ecological Indicator for Assessment of Ecosystem Health -- 9.6 Emergy as Ecological Indicator to Assess Ecosystem Health -- 9.7 The Eco-Exergy to Empower Ratio and the Efficiency of Ecosystems -- 9.8 Application of Eco-Exergy and Ascendency as Ecological Indicator to the Mondego Estuary (Portugal) -- 9.9 Conclusions -- Chapter 10. Conclusions and Final Remarks -- 10.1 Are Basic Ecological Properties Needed to Explain our Observations? -- 10.2 Previous Attempts to Present an Ecosystem Theory -- 10.3 Recapitulation of the Ecosystem Theory -- 10.4 Are there Basic Ecosystem Principles? -- 10.5 Conclusion -- References -- Index.
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  • 2
    Online Resource
    Online Resource
    Berlin, Heidelberg :Springer Berlin / Heidelberg,
    Keywords: Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (491 pages)
    Edition: 1st ed.
    ISBN: 9783662292723
    Language: German
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  • 3
    Publication Date: 2023-05-12
    Keywords: Area/locality; Conductivity, average; Depth, bottom/max; Depth, top/min; ELEVATION; Heat flow; LATITUDE; LONGITUDE; Method comment; Number; Sample, optional label/labor no; Temperature gradient
    Type: Dataset
    Format: text/tab-separated-values, 216 data points
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  • 4
    Publication Date: 2023-05-12
    Keywords: Area/locality; Conductivity, average; Depth, bottom/max; Depth, top/min; ELEVATION; Heat flow; LATITUDE; LONGITUDE; Method comment; Number; Sample, optional label/labor no; Temperature gradient
    Type: Dataset
    Format: text/tab-separated-values, 72 data points
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  • 5
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Objective To investigate the magnitude and pattern of the changes in bone mass during five years of continuous and cyclic sequential oestrogen/progestin treatment.Design Prospective study of normal, early postmenopausal women, initially a double-blind, placebo controlled trial, subsequently an open, controlled investigation.Setting Clinical physiology unit of a general hospital.Subjects Sixty-eight normal, early postmenopausal women.Results 1. Continuous treatment resulted in significantly higher lumbar spine bone density than did sequential treatment (P 〈 0.001). Lumbar spine bone density was 19% and 15%, respectively, above that of untreated women after three years and onwards, and 10% and 6%, respectively, above the initial value; 2. Both regimens induced a more pronounced rise in lumbar spine bone density than in forearm bone mineral content (P 〈 0.001); 3. The spontaneous decline (without treatment) in lumbar spine bone density and forearm bone mineral content averaged 1.86% and 1.90% per year, respectively. 4. There was a significant bone loss from the lumbar spine during the last year of active treatment (P 〈 0.001). This would suggest that lumbar spine bone density rises to a certain level and subsequently declines. However, neither data pooled before computation nor data processed individually for each patient over five years allowed for any definite conclusions regarding the pattern of the long term skeletal response to combined oestrogen/progestin treatment.Conclusion Five years treatment with oestradiol/norethisterone resulted in a substantial gain in bone mass. The highest values were found in the axial skeleton with daily administration of 2 mg oestradiol and 1 mg norethisterone. It is likely that bone mass after an absolute rise begins to decline after about four years of treatment.
    Type of Medium: Electronic Resource
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  • 6
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: In a prospective clinical trial the effectiveness of a combination of 400 mg of mifepristone (antiprogesterone) and 400 g misoprostol (synthetic prostaglandin E1 analogue), both taken orally, was evaluated for the treatment of missed abortion. Of the 31 patients included, 16 (52%) had an empty uterine cavity at follow up six days after inclusion, 11 (35%) required surgical evacuation for retained intrauterine products of conception found at follow up, and four (13%) required emergency surgical evacuation due to severe pain or bleeding. The results do not support the use of mifepristone and misoprostol for women wishing the miscarriage to be resolved quickly.
    Type of Medium: Electronic Resource
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  • 7
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    BJOG 104 (1997), S. 0 
    ISSN: 1471-0528
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Type of Medium: Electronic Resource
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  • 8
    Electronic Resource
    Electronic Resource
    [S.l.] : American Institute of Physics (AIP)
    Review of Scientific Instruments 71 (2000), S. 1793-1803 
    ISSN: 1089-7623
    Source: AIP Digital Archive
    Topics: Physics , Electrical Engineering, Measurement and Control Technology
    Notes: We present an experimental setup for measuring the electrical conductance through metallic quantum point contacts (QPCs) under constant or time-dependent bias voltage conditions. The response time of the setup is as short as 25 ns and typical bias voltages range from 10 mV to 2 V. A function generator is used as bias voltage supply. With this, voltage bursts with a frequency of up to 100 kHz can be applied to the QPCs, whereby current-to-voltage (I–V) curves can be acquired using a homebuilt, 30 MHz bandwidth I–V converter, and a 100 Msamples/s digital storage oscilloscope. Test experiments on resistors show that nonlinear contributions to the I–V curves are always less than 1% of the current for all applied voltages. From the slope of the I–V curves, the conductance can be determined with an accuracy better than 1%. The QPCs are formed between a single-crystal metal sample and the tip of a scanning tunneling microscope under clean ultrahigh vacuum conditions. We demonstrate how the setup can be used to capture the I–V curves of several metastable states in a Au QPC, as it breaks during a period of 200 μs at room temperature. © 2000 American Institute of Physics.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 84 (1986), S. 698-708 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: The B˜ 2Σ+–X˜ 2Σ+ transitions of BaOH and BaOD were studied by the technique of dye laser spectroscopy. The 000–000 and 001–000 bands of BaOH and 000–000 band of BaOD were rotationally analyzed. The B˜ 2Σ+ state is perturbed by the A˜ 2Π state and each parity (e/f) component of the B state was fit separately. BaOH is a linear molecule with r0(Ba–O)=2.201 A(ring) and r0(O–H)=0.923 A(ring). The X˜ 2Σ+ vibrational frequencies for BaOH (BaOD) are 492.4 (482.4) cm−1 for Ba–O stretch and 341.6 (257.6) cm−1 for the bend.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    College Park, Md. : American Institute of Physics (AIP)
    The Journal of Chemical Physics 82 (1985), S. 1043-1045 
    ISSN: 1089-7690
    Source: AIP Digital Archive
    Topics: Physics , Chemistry and Pharmacology
    Notes: A large number of novel organometallic radicals have been observed by laser induced fluorescence spectroscopy. These species were produced by the gas phase reaction of calcium and strontium with various aldehydes, ketones, alcohols, and carboxylic acids.
    Type of Medium: Electronic Resource
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