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  • 1
    Online Resource
    Online Resource
    Cham :Springer International Publishing AG,
    Keywords: Power (Mechanics) -- Study and teaching. ; Electronic books.
    Type of Medium: Online Resource
    Pages: 1 online resource (376 pages)
    Edition: 1st ed.
    ISBN: 9783319050171
    DDC: 530.071
    Language: English
    Note: Intro -- Acknowledgements -- Contents -- Chapter 1: Introduction: Why Focus on Energy Instruction? -- 1.1 Realizing the Need for a Summit -- 1.2 Structure of the Summit -- 1.2.1 Goals and Participants -- 1.2.2 Surfacing and Discussing Ideas -- 1.2.3 Teacher Voices and a Second Summit for Teachers -- 1.3 Organization of This Book -- References -- Part I What Should Students Know About Energy? -- Chapter 2: A Physicist's Musings on Teaching About Energy -- 2.1 Introduction -- 2.2 The Particle Physicist's View of Energy -- 2.3 Descriptions of Various Types of Energy -- 2.3.1 Thermal Energy -- 2.3.2 Chemical Energy -- 2.3.3 Mechanical and Electrical Energy -- 2.3.4 Conservation of Mass? -- 2.3.5 Energy Flows (Convection, Conduction and Radiation) -- 2.3.6 Nuclear Energy -- 2.4 Key Energy Concepts for K-12 Science Education -- 2.4.1 Only Changes in Energy Matter (Who Cares How Much You Have if Most of It Is Not Negotiable) -- 2.4.2 Any Change in Energy Is Balanced by Some Other Change in Energy (You Can't Make or Destroy Energy, Only Move It Around) -- 2.4.3 Energy Availability Governs What Can Happen (You Can't Do Anything Without Energy) -- 2.4.4 Energy Tends to Spread Itself Around as Much as Possible -- 2.5 When and How Can Students Learn About Energy? -- References -- Chapter 3: A Space Physicist's Perspective on Energy Transformations and Some Implications for Teaching About Energy Conservation at All Levels -- 3.1 Introduction -- 3.2 Magnetic Reconnection: Energy in Fields -- 3.3 The Energy Transport Equation in Magnetohydrodyamics: Energy Conservation and Transfer -- 3.4 Conclusions -- References -- Chapter 4: Conservation of Energy: An Analytical Tool for Student Accounts of Carbon-Transforming Processes -- 4.1 Introduction -- 4.2 A Key Goal: Using Energy Conservation as an Analytical Tool -- 4.3 Challenges and Instructional Supports. , 4.3.1 Understanding the Purpose of the Concept of Energy -- 4.3.1.1 Developing a Sense of Necessity About Energy Conservation -- 4.3.1.2 Quasi-quantitative Representations of Energy -- 4.3.2 Identifying Forms of Energy in Living Systems -- 4.3.3 Tracing Energy Separately from Matter -- 4.4 Conclusion -- References -- Part II What Does the Research Say About the Teaching and Learning About Energy? -- Chapter 5: Teaching and Learning the Physics Energy Concept -- 5.1 Introduction -- 5.2 Energy - A Core Physics Concept -- 5.2.1 On the Energy Concept in Physics -- 5.2.2 Four Basic Ideas of the Energy Concept -- 5.2.3 On the Nature of the Four Basic Ideas -- 5.2.4 On the Relation of the Four Basic Ideas to Standards and Instruction -- 5.3 Conceptualizations of Energy -- 5.3.1 Energy Is an Abstract Accounting Quantity -- 5.3.2 Energy Is the Ability to Do Work -- 5.3.3 Energy Is the Ability to Cause Changes -- 5.3.4 Energy Is the Ability to Produce Heat -- 5.3.5 Energy Is a General Kind of Fuel -- 5.3.6 The Conceptualist and the Materialist Distinction -- 5.3.7 Energy Is a Substance-Like Quantity -- 5.3.8 Energy Forms -- 5.4 Findings of Studies on Teaching and Learning Energy -- 5.4.1 On the State of Research in the Early 1990s -- 5.4.1.1 Students' Conceptions of Energy -- 5.4.1.2 Results of Learning the Energy Concept During School Science Instruction -- 5.4.2 Learning Progressions Towards the Energy Concept -- 5.4.2.1 Results of a Study on Deliberately Developing Energy Ideas -- 5.4.2.2 A Survey on Student Learning Progression Drawing on TIMMS Data -- 5.4.2.3 Development of Energy Ideas During a Series of Units in Chemistry -- 5.4.2.4 Development of Energy Ideas from Grade 6 to 10 -- 5.4.3 Learning Progressions on Energy - A Summarizing View -- 5.5 Towards Unfolding and Differentiating Students Pre-instructional Ideas -- References. , Chapter 6: What Knowledge and Ability Should High School Students Have for Understanding Energy in Chemical Reactions? An Analysis of Chemistry Curriculum Standards in Seven Countries and Regions -- 6.1 Introduction -- 6.2 Scientific Perspective on Energy in Chemical Reactions (ECR) -- 6.3 Curriculum Standards Analysis -- 6.3.1 Country and Region Selection -- 6.3.2 Methodology -- 6.3.3 Results -- 6.3.3.1 Analysis of Knowledge -- 6.3.3.2 Categories of Performance Expectations -- 6.4 A Proposed Cognitive and Reasoning Model for Learning ECR -- 6.5 Hypothesized Cognitive Levels for Learning ECR -- 6.6 Discussion and Implications -- References -- Chapter 7: Developing and Using Distractor-Driven Multiple-Choice Assessments Aligned to Ideas About Energy Forms, Transformation, Transfer, and Conservation -- 7.1 Introduction -- 7.2 Item Development -- 7.2.1 Selecting a Set of Target Learning Goals -- 7.2.2 Consulting the Research Literature on Students' Understanding of Energy -- 7.2.3 Clarification of the Target Learning Goals -- 7.2.4 Efforts to Ensure Validity -- 7.2.5 Pilot Testing -- 7.2.6 Field Testing and Data Collection -- 7.3 Rasch Modeling -- 7.3.1 Model Fit -- 7.3.2 Wright Maps -- 7.4 Grade-to-Grade Differences -- 7.5 Students' Knowledge and Misconceptions -- 7.5.1 Motion Energy -- 7.5.2 Thermal Energy (Substance Level) -- 7.5.3 Thermal Energy (Atomic Level) -- 7.5.4 Gravitational Potential Energy -- 7.5.5 Elastic Energy -- 7.5.6 Energy Transformation -- 7.5.7 Energy Transfer -- 7.5.8 Conservation of Energy -- 7.6 Implications for Instruction -- 7.7 Moving Forward -- 7.8 Conclusions -- References -- Chapter 8: Mapping Energy in the Boston Public Schools Curriculum -- 8.1 Introduction -- 8.2 Methods -- 8.2.1 Boston Public Schools (BPS) Curriculum -- 8.2.2 The Energy Institute -- 8.2.2.1 Identifying Units Containing Energy. , 8.2.2.2 Identifying Energy Connections -- 8.2.3 Content Network Mapping -- 8.3 Results -- 8.4 Discussion -- 8.4.1 Major Energy Concepts in BPS -- 8.4.2 The Energy Institute -- 8.4.3 Challenges -- 8.4.4 Future Steps -- 8.5 Conclusions -- References -- Part III Challenges Associated with the Teaching and Learning of Energy -- Chapter 9: Using Ideas from the History of Science and Linguistics to Develop a Learning Progression for Energy in Socio-ecological Systems -- 9.1 Introduction -- 9.2 Historical Analysis -- 9.2.1 Inquiry into Fire: How Energy Was Differentiated from Matter -- 9.2.2 Inquiry into Life: How Energy Was Differentiated from Life -- 9.3 Linguistic Analysis -- 9.3.1 Definitions of Energy in English Dictionaries -- 9.3.2 Informal Views of Energy -- 9.3.2.1 Sources of Energy -- 9.3.2.2 Nature of Energy -- 9.3.2.3 Causal Reasoning -- 9.4 The Learning Progression for Energy in Socio-ecological Systems -- 9.4.1 The Learning Progression for Energy -- 9.4.2 Trends of Development -- 9.4.2.1 From a Broad Association to a Restricted Association -- 9.4.2.2 From Tracing the Cause-and-Effect Chain to Tracing Energy Separately from Matter and with Heat Dissipation -- 9.5 Implication for Teaching Energy -- References -- Chapter 10: Contextual Dimensions of the Energy Concept and Implications for Energy Teaching and Learning -- 10.1 Introduction -- 10.2 Cultural Context of the Energy Concept -- 10.3 Social Context of the Energy concept -- 10.4 Political Context of the Energy Concept -- 10.5 Implications of Contexts of the Energy Concept -- 10.5.1 Energy as a Scientific Worldview and Cultural Construct -- 10.5.2 Energy as Civic Literacy -- References -- Chapter 11: Towards a Research-Informed Teaching Sequence for Energy -- 11.1 Introduction -- 11.2 Discourses of Energy -- 11.3 Issues and Disputes -- 11.3.1 Defining Terms -- 11.3.2 Forms of Energy. , 11.3.3 Energy as a Cause -- 11.3.4 The Problem of Heat -- 11.4 Tiptoeing Through the Minefield -- 11.5 Testing a Teaching Sequence -- Appendix: A Proposed Teaching Sequence for the Topic of Energy to Age 16 -- References -- Chapter 12: Distinctive Features and Underlying Rationale of a Philosophically-Informed Approach for Energy Teaching -- 12.1 Introduction -- 12.2 Epistemological Barriers Associated with Teaching and Learning About Energy -- 12.2.1 Energy Is a Crosscutting Construct -- 12.2.2 Energy Cannot Be Easily Attached to Kinesthetic Content -- 12.2.3 Energy Does Not Lend Itself to an Operational Definition -- 12.3 A Philosophically-Informed Teaching Proposal About Energy in Middle School -- 12.3.1 Energy as a Theoretical Framework Rather Than a Physical Quantity: An Alternative Perspective for Elaborating Energy -- 12.3.2 Overview of the Structure for a Teaching-Learning Sequence -- 12.3.3 Key Features of the Teaching Materials -- 12.3.3.1 Continual Interplay Between Conceptual Elaboration and Epistemic Discourse -- 12.3.3.2 Emphasis on the Crosscutting Nature of Energy -- 12.3.3.3 Emphasis on Integrating the Features of Energy into a Coherent Whole -- 12.3.3.4 Distinguishing Between States and Processes -- 12.4 Research Agenda -- References -- Chapter 13: Repairing Engineering Students' Misconceptions About Energy and Thermodynamics -- 13.1 Introduction -- 13.2 What Are the Challenges We Are Facing in Teaching Students About Energy? -- 13.2.1 The Second Law -- 13.2.2 Temperature and Energy -- 13.2.3 Rate vs. Amount -- 13.2.4 Internal Energy and Enthalpy -- 13.3 What Should Be Done to Meet These Challenges? -- 13.3.1 Inquiry-Based Approach -- 13.3.2 Results and Discussion -- References -- Part IV Opportunities and Approaches for Teaching and Learning About Energy -- References. , Chapter 14: Looking Through the Energy Lens: A Proposed Learning Progression for Energy in Grades 3-5.
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  • 2
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    Unknown
    PANGAEA
    In:  Supplement to: You, Chen-Feng; Gieskes, Joris M; Chen, Robert F; Spivack, Arthur J; Gamo, Toshitaka (1993): Iodide, bromide, manganese, boron, and dissolved organic carbon in interstitial waters of organic carbon-rich marine sediments: observations in the Nankai accretionary prism. In: Hill, IA; Taira, A; Firth, JV; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 131, 165-174, https://doi.org/10.2973/odp.proc.sr.131.116.1993
    Publication Date: 2024-03-09
    Description: This study of the interstitial water concentration-depth distributions of iodide, bromide, boron, d11B, and dissolved organic carbon, as represented by absorbance at 325 nm (yellow substance: YS) and laser-induced fluorescence (LIF), is a follow-up of the extensive shipboard program of interstitial water analysis during ODP Leg 131. Most of the components studied are associated with processes involving the diagenesis of organic matter in these sediments. Three zones of the sediment column are discussed separately because of the different processes involved in causing concentration changes: 1. The upper few hundreds of meters: In this zone, characterized by very high sedimentation rates (〉1200 m/m.y.), interstitial waters show very sharp increases in alkalinity, ammonia, iodide, bromide, YS, and LIF, mainly as a result of the diagenesis of organic carbon; 2. Whereas below 200 mbsf concentration gradients all show a decreasing trend, the zone at ~ 365 mbsf is characterized by concentration reversals, mainly due to the recent emplacement of deeper sediments above this depth as a result of thrust-faulting; 3. The décollement zone (945-964 mbsf) is characterized by concentration anomalies in various constituents (bromide, boron, d11B, manganese, LIF). These data are interpreted as resulting from an advective input of fluids along the zone of décollement as recent as ~ 200 ka. Possibly periodic inputs of anomalous fluids still seem to occur along this décollement zone.
    Keywords: 131-808A; 131-808B; 131-808C; Boron; Bromine; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Event label; Fluorescence; Iodide; Joides Resolution; Leg131; Manganese; Ocean Drilling Program; ODP; Philippine Sea; Sample code/label; Yellow substance; δ11B
    Type: Dataset
    Format: text/tab-separated-values, 334 data points
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  • 3
    Publication Date: 2024-03-09
    Keywords: Alkalinity, total; Carbon, organic, dissolved; DEPTH, sediment/rock; Fluorescence; LATITUDE; LONGITUDE; Sample code/label
    Type: Dataset
    Format: text/tab-separated-values, 171 data points
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  • 4
    Publication Date: 2024-03-09
    Keywords: 131-808A; 131-808B; 131-808C; 64-478; 64-479; 67-496; 67-499_Site; 74-525_Site; Absorbance; Alkalinity, total; Carbon, organic, dissolved; COMPCORE; Composite Core; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Event label; Fluorescence; Glomar Challenger; Joides Resolution; Leg131; Leg64; Leg67; Leg74; North Pacific/Gulf of California/BASIN; North Pacific/Gulf of California/CHANNEL; North Pacific/TRENCH; Ocean Drilling Program; ODP; Philippine Sea; Sample code/label; South Atlantic/CREST
    Type: Dataset
    Format: text/tab-separated-values, 313 data points
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  • 5
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    Unknown
    PANGAEA
    In:  Supplement to: Chen, Robert F; Bada, Jeffrey L (1994): The fluorescence of dissolved organic matter in porewaters of marine sediments. Marine Chemistry, 45(1-2), 31-42, https://doi.org/10.1016/0304-4203(94)90089-2
    Publication Date: 2024-03-09
    Description: The fluorescence of porewaters from marine sediment cores from six different areas was measured. In most cases, fluorescence was affected primarily by the diagenesis of organic carbon first through sulfate reduction and subsequently by methane generation. Typically, fluorescence, dissolved organic carbon (DOC), absorbance, alkalinity, and ammonium ion concentrations correlate quite well, increasing in the upper sections of anoxic sediments and co-varying in deeper sections of these cores. The good correlation of DOC with fluorescence in the three cores in which DOC was measured indicates that fluorescence can be used to make a first order estimate of DOC concentration in anoxic porewaters. Data are consistent with a model in which labile organic matter in the sediments is broken down by sulfur reducing bacteria to low molecular weight monomers. These monomers are either remineralized to CO2 or polymerize to form dissolved, fluorescent, high molecular weight molecules. The few exceptions to this model involve hydrothermally generated hydrocarbons that are formed in situ in the Guaymas Basin or are horizontally advected along the decollement in the Nankai Trench.
    Keywords: 131-808A; 131-808B; 131-808C; 64-478; 64-479; 67-496; 67-499_Site; 74-525_Site; COMPCORE; Composite Core; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Joides Resolution; Leg131; Leg64; Leg67; Leg74; North Pacific/Gulf of California/BASIN; North Pacific/Gulf of California/CHANNEL; North Pacific/TRENCH; Ocean Drilling Program; ODP; Philippine Sea; South Atlantic/CREST
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 6
    Publication Date: 2022-05-25
    Description: Author Posting. © American Geophysical Union, 2018. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Global Biogeochemical Cycles 32 (2018): 389-416, doi:10.1002/2017GB005790.
    Description: Carbon cycling in the coastal zone affects global carbon budgets and is critical for understanding the urgent issues of hypoxia, acidification, and tidal wetland loss. However, there are no regional carbon budgets spanning the three main ecosystems in coastal waters: tidal wetlands, estuaries, and shelf waters. Here we construct such a budget for eastern North America using historical data, empirical models, remote sensing algorithms, and process‐based models. Considering the net fluxes of total carbon at the domain boundaries, 59 ± 12% (± 2 standard errors) of the carbon entering is from rivers and 41 ± 12% is from the atmosphere, while 80 ± 9% of the carbon leaving is exported to the open ocean and 20 ± 9% is buried. Net lateral carbon transfers between the three main ecosystem types are comparable to fluxes at the domain boundaries. Each ecosystem type contributes substantially to exchange with the atmosphere, with CO2 uptake split evenly between tidal wetlands and shelf waters, and estuarine CO2 outgassing offsetting half of the uptake. Similarly, burial is about equal in tidal wetlands and shelf waters, while estuaries play a smaller but still substantial role. The importance of tidal wetlands and estuaries in the overall budget is remarkable given that they, respectively, make up only 2.4 and 8.9% of the study domain area. This study shows that coastal carbon budgets should explicitly include tidal wetlands, estuaries, shelf waters, and the linkages between them; ignoring any of them may produce a biased picture of coastal carbon cycling.
    Description: NASA Interdisciplinary Science program Grant Number: NNX14AF93G; NASA Carbon Cycle Science Program Grant Number: NNX14AM37G; NASA Ocean Biology and Biogeochemistry Program Grant Number: NNX11AD47G; National Science Foundation's Chemical Oceanography Program Grant Number: OCE‐1260574
    Description: 2018-10-04
    Keywords: Carbon cycle ; Coastal zone ; Tidal wetlands ; Estuaries ; Shelf waters
    Repository Name: Woods Hole Open Access Server
    Type: Article
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  • 7
    Electronic Resource
    Electronic Resource
    [s.l.] : Nature Publishing Group
    Nature 387 (1997), S. 166-169 
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Between 25% and 35% of marine DOC is in a high-molecular-weight fraction that can be recovered by ultrafiltration or dialysis8"10. Using these techniques, organic matter was sampled at sites in the Atlantic and eastern tropical Pacific oceans (Table 1). Proton NMR of ultrafiltered dissolved organic ...
    Type of Medium: Electronic Resource
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  • 8
    Publication Date: 2012-03-10
    Description: Northern peatlands are likely to be important in future carbon cycle-climate feedbacks due to their large carbon pools and vulnerability to hydrological change. Use of non-peatland-specific models could lead to bias in modeling studies of peatland-rich regions. Here, seven ecosystem models were used to simulate CO2 fluxes at three wetland sites in Canada and the northern United States, including two nutrient-rich fens and one nutrient-poor, sphagnum-dominated bog, over periods between 1999 and 2007. Models consistently overestimated mean annual gross ecosystem production (GEP) and ecosystem respiration (ER) at all three sites. Monthly flux residuals (simulated – observed) were correlated with measured water table for GEP and ER at the two fen sites, but were not consistently correlated with water table at the bog site. Models that inhibited soil respiration under saturated conditions had less mean bias than models that did not. Modeled diurnal cycles agreed well with eddy covariance measurements at fen sites, but overestimated fluxes at the bog site. Eddy covariance GEP and ER at fens were higher during dry periods than during wet periods, while models predicted either the opposite relationship or no significant difference. At the bog site, eddy covariance GEP did not depend on water table, while simulated GEP was higher during wet periods. Carbon cycle modeling in peatland-rich regions could be improved by incorporating wetland-specific hydrology and by inhibiting GEP and ER under saturated conditions. Bogs and fens likely require distinct plant and soil parameterizations in ecosystem models due to differences in nutrients, peat properties, and plant communities.
    Print ISSN: 0148-0227
    Topics: Biology , Geosciences
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  • 9
    Publication Date: 2017-11-02
    Description: ABSTRACT Fibrosis and cancer represent two major complications of chronic liver disease. MicroRNAs have been implicated in the development of fibrosis and cancer, thus constituting potential therapeutic targets. Here, we investigated the role of miR-21, a microRNA that has been implicated in the development of fibrosis in multiple organs and also been suggested to act as “oncomir”. Accordingly, miR-21 was the microRNA that showed the strongest upregulation in activated hepatic stellate cells (HSC) in multiple models of fibrogenesis, with an 8- to 24-fold induction compared to quiescent HSC. However, miR-21 antisense inhibition did not suppress the activation of murine or human HSC in culture or in liver slices. Moreover, antisense inhibition or genetic deletion of miR-21 in two independently generated knockout mice did not alter HSC activation or liver fibrosis in models of toxic and biliary liver injury. Despite a strong upregulation of miR-21 in injury-associated hepatocellular carcinoma and in cholangiocarcinoma, miR-21 deletion or antisense inhibition did not reduce the development of liver tumors. As inhibition of the most upregulated microRNA did not affect HSC activation, liver fibrosis and fibrosis-associated liver cancer, we additionally tested the role of microRNAs in HSC by HSC-specific Dicer deletion. Although Dicer deletion decreased microRNA expression in HSC and altered the expression of select genes, it only exerted negligible effects on HSC activation and liver fibrosis. In conclusion, genetic and pharmacologic manipulation of miR-21 does not inhibit the development of liver fibrosis and liver cancer. Moreover, suppression of microRNA synthesis does not significantly affect HSC phenotype and activation. This article is protected by copyright. All rights reserved.
    Print ISSN: 0270-9139
    Electronic ISSN: 1527-3350
    Topics: Medicine
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