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  • Articles  (63,486)
  • Wiley  (60,796)
  • Annual Reviews
  • 2000-2004  (38,138)
  • 1980-1984  (25,348)
  • Chemistry and Pharmacology  (40,925)
  • Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition  (15,432)
  • Energy, Environment Protection, Nuclear Power Engineering  (9,489)
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  • Articles  (63,486)
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  • 1
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Environment and Resources 26 (2001), S. 269-301 
    ISSN: 1056-3466
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Over the past 20 years, a new scientific discipline based on direct measurement of human exposure to environmental pollutants has developed. The fundamental principle of the new science is to "measure where the people are." This has required developing small, lightweight, quiet personal monitors for volatile organic compounds and other pollutants. A second principle has been to measure body burden, particularly exhaled breath, whenever possible to determine the relationship between exposure and dose. Studies employing the new monitors and breath measurements have overturned accepted ideas about the sources of most volatile organic pollutants. The main sources turn out surprisingly often to be small, close to the person, and completely unregulated. These findings should result in major changes in our approach to environmental regulation; however, powerful forces of resistance would need to be overcome.
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  • 2
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    Palo Alto, Calif. : Annual Reviews
    Annual Review of Environment and Resources 26 (2001), S. 331-359 
    ISSN: 1056-3466
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract This paper reviews the progress of the movement to privatize and liberalize the power sector in developing countries. It reviews the forces driving the movement and then describes the steps that should be taken to achieve success. Data on actual steps taken and preliminary information on the impact of reform are presented. Finally, lessons from this past experience are highlighted.
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  • 3
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    Palo Alto, Calif. : Annual Reviews
    Annual Review of Environment and Resources 26 (2001), S. 361-389 
    ISSN: 1056-3466
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Growing international pressure to curb greenhouse gas (GHG) emissions has focused attention on existing policies that may, either by design or by effect, subsidize fossil fuel production and consumption. This paper reviews existing studies of fossil fuel subsidies within the United States, as well as assessments of the potential impact of subsidy reform on GHG emissions. Evaluating the differences across the studies, it highlights the most important disparities in subsidy definition and valuation in order to clarify the conclusions that can be drawn from this body of work. We then present some of the tools used to provide transparency in environmental regulation. We conclude that many of these approaches can be used to improve the transparency of fiscal policy, with important benefits within the context of climate change and beyond.
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  • 4
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    Annual Review of Environment and Resources 26 (2001), S. 435-465 
    ISSN: 1056-3466
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract In addition to being scientifically exciting, commercially important, and environmentally essential, temperate forests have also become a key diplomatic item in international climate negotiations as potential sinks for carbon. This review presents the methods used to estimate carbon sequestration, identifies the constraints and opportunities for carbon sequestration in temperate forests, addresses the issues raised by the monitoring of carbon sequestration, and analyzes uncertainties pertaining to the sequestration of carbon by temperate forests. This review serves a dual purpose: It aims at informing policy makers about carbon sequestration in temperate forests and at making forest ecologists, biogeochemists, and atmospheric scientists aware of the structure of an international agreement to reduce CO2 and other greenhouse gas emissions and some of the real, still answered scientific questions that it poses.
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  • 5
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    Palo Alto, Calif. : Annual Reviews
    Annual Review of Environment and Resources 27 (2002), S. 23-56 
    ISSN: 1056-3466
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: The evolution from an electrochemist was motivated by a growing conviction that Indian science and technology should be reoriented. A cell was created in the Indian Institute of Science in 1974 to initiate and promote work of rural relevance as a weapon against poverty. Surveys led to a detailed empirical study of energy consumption patterns in villages and to the design and construction of rural energy centers. The lessons from this village work are described. The principal outcome of the collaboration with J. Goldemberg (Brazil), T.B. Johansson (Sweden), and R.H. Williams (United States) was the book Energy for a Sustainable World that contributed significantly to the new paradigm for energy. The application of this paradigm resulted in a detailed electricity demand scenario for the South Indian state of Karnataka. Following mandatory retirement from the Indian Institute of Science, the International Energy Initiative (IEI) was set up in 1991 as a Southern-conceived, Southern-led, Southern-located South-North partnership. Persisting personal concerns about the ethical implications of science resurfaced through opposition to India's nuclear tests in 1998 and a visit to the concentration camps at Auschwitz. The associated human dimensions of energy were emphasized in the acceptance speech at Goteborg of the Volvo Environment Prize 2000. The penultimate endgame involved retirement.
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  • 6
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    Palo Alto, Calif. : Annual Reviews
    Annual Review of Environment and Resources 27 (2002), S. 57-81 
    ISSN: 1056-3466
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract From modest beginnings in the 1960s, environmental economics has grown to be a major subdiscipline of economics. It combines traditional work in the field of welfare economics and the theory of economic growth with more recent perspectives on the political economy of choosing policy instruments and the philosophy of sustainable development. The central tenets are that environmental problems have their roots in the failure of economic systems to maximize human well-being, that environmental quality matters for human well-being and for more traditionally oriented economic growth objectives, and that efficient policy can be achieved through incentive design.
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  • 7
    ISSN: 1056-3466
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Students of public policy sometimes envision an idealized policy process where competent data collection and incisive analysis on both sides of a debate lead to reasoned judgments and sound decisions. Unfortunately, numbers that prove decisive in policy debates are not always carefully developed, credibly documented, or correct. This paper presents four widely cited examples of numbers in the energy field that are either misleading or wrong. It explores the origins of these numbers, how they missed the mark, and how they have been misused by both analysts and the media. In addition, it describes and uses a three-stage analytical process for evaluating such statistics that involves defining terms and boundaries, assessing underlying data, and critically analyzing arguments.
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  • 8
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    Annual Review of Environment and Resources 27 (2002), S. 159-192 
    ISSN: 1056-3466
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Minimum energy efficiency standards are regulations that require products to meet specific energy efficiency requirements. Standards have been adopted in 17 countries plus the European Union. Standards have been set on more than 35 products, with refrigerators, air conditioners, ballasts, and freezers being the most common. Based on the available evidence, standards appear to be a very effective energy-saving policy. They have reduced energy use substantially in the United States and made good initial progress in other countries. The standards that have been implemented thus far appear to be cost effective to consumers and result in minimal adverse impacts on manufacturers. Available evidence indicates that the costs of actually implementing standards are commonly less than estimates made by manufacturers and government agencies during the standard-setting process. Standards are frequently a useful complement to other policies such as product labeling, incentives, and voluntary agreements. However, standards are not appropriate for all products and situations.
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  • 9
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    Annual Review of Environment and Resources 27 (2002), S. 233-270 
    ISSN: 1056-3466
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Globally, almost three billion people rely on biomass (wood, charcoal, crop residues, and dung) and coal as their primary source of domestic energy. Exposure to indoor air pollution from the combustion of solid fuels is an important cause of disease and mortality in developing countries. Despite recent advances in estimating the health impacts of indoor smoke, there are limited studies targeted toward the design and implementation of effective intervention programs. We review the current knowledge of the relationship between indoor air pollution and disease, and of the assessment of interventions for reducing exposure and disease. This review takes an environmental health perspective and considers the details of both exposure and health effects that are needed for successful intervention strategies. In particular, we summarize the emerging understanding of the central role of household energy technology and day-to-day household activities in determining exposure to indoor smoke. We also identify knowledge gaps and detailed research questions that are essential in successful design and dissemination of preventive measures and policies. In addition to specific research recommendations based on the weight of recent studies, we conclude that research and development of effective interventions can benefit tremendously from integration of methods and analysis tools from a range of disciplines-from quantitative environmental science and engineering, to toxicology and epidemiology, to the social sciences.
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  • 10
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    Annual Review of Environment and Resources 27 (2002), S. 271-308 
    ISSN: 1056-3466
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Technical change in the energy sector is central for addressing long-term environmental issues, including climate change. Most models of energy, economy, and the environment (E3 models) use exogenous assumptions for this. This is an important weakness. We show that there is strong evidence that technical change in the energy sector is to an important degree induced by market circumstances and expectations and, by implication, by environmental policies such as CO2 abatement. We classify the main approaches to modeling such induced technical change and review results with particular reference to climate change. Among models with learning by doing, weak responses are only obtained from models that are highly aggregated (lack technological diversity) and/or that equate rates of return to innovation across sectors. Induced technical change broadens the scope of efficient policies toward mitigation, including not just research and development and aggregated market instruments but a range of sectoral-based policies potentially at divergent marginal costs. Furthermore, to the extent that cleaner technologies induced by mitigation diffuse globally, a positive spillover will result that will tend to offset the substitution-based negative spillover usually hypothesized to result from the migration of polluting industries. Initial explorations suggest that this effect could also be very large.
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  • 11
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    Palo Alto, Calif. : Annual Reviews
    Annual Review of Environment and Resources 25 (2000), S. 1-19 
    ISSN: 1056-3466
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract A young man adrift, I was rescued by Paul Gast, a college classmate, and sent off to Columbia's Lamont Geological Observatory as a summer intern. As it turns out, I am still there. During this 47-year sojourn, I have been a participant in the enormous expansion of the field of isotope geochemistry. I experienced the golden age when so many plums awaited picking that we, the pioneers, gorged ourselves with exciting discovery. Being at what is now called Lamont-Doherty Earth Observatory put me at the center of many of the developments that changed forever the Earth Sciences. It also made me part of the great challenge associated with the drive to replace the exploitative mode that characterized the Industrial Revolution with what is often referred to as the sustainable mode. In the following pages I recount my path from confused youth to the globe-encircling oceanic "conveyor belt."
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  • 12
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    Palo Alto, Calif. : Annual Reviews
    Annual Review of Environment and Resources 29 (2004) 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
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  • 13
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    Annual Review of Environment and Resources 25 (2000), S. 147-197 
    ISSN: 1056-3466
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The 1990s saw a resurgence in the windpower industry, with installed grid-connected capacity expanding more than five-fold between 1990 and 2000. Most of this increase occurred in Europe, where governmental policies aimed at developing domestic energy supplies and reducing pollutant emissions provided a sheltered market for renewable energy generation. The 1990s were also marked by a return to large, megawatt-sized wind turbines, a reduction and consolidation of wind turbine manufacturers, and increased interest in offshore windpower. This article reviews recent trends in the windpower industry, including some of the fundamental engineering principles of wind turbine design. Technological impediments and advances are discussed in the context of changes in the global electricity markets and environmental performance.
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  • 14
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    Annual Review of Environment and Resources 28 (2003), S. 275-314 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Water managers and planners are slowly beginning to change their perspective and perceptions about how best to meet human needs for water; they are shifting from a focus on building supply infrastructure to improving their understanding of how water is used and how those uses can best be met. This review discusses definitions of water use, explores the history of water use around the world and in characteristic regions, identifies problems with collecting and analyzing water data, and addresses the question of improving water-use efficiency and productivity in different regions and economic sectors. There is growing interest on the part of water managers around the world to implement these approaches to lessen pressures on increasingly scarce water resources, reduce the adverse ecological effects of human withdrawals of water, and improve long-term sustainable water use.
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  • 15
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    Annual Review of Environment and Resources 29 (2004), S. 421-469 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Concerns about safeguarding key infrastructures (such as energy, communications, banking, and roads) from deliberate attack are long-standing, but since the end to the cold war, emphasis has turned to the possible impacts of terrorism. Activities to address these concerns are sometimes called critical infrastructure protection (CIP), a concept that is somewhat different from the one of "energy security," which focuses on politically and economically motivated supply interruptions. Different elements of the energy infrastructure are characterized by distinct vulnerabilities. Breaches of security in nuclear plants can lead to large-scale environmental disastersbut the infrastructure is concentrated and relatively easy to guard. Oil and gas production, transportation, and refining infrastructures are often spatially concentrated, and disruptions can lead to shortages if supply is not restored before stockpiles are exhausted. Traditional electricity infrastructures suffer from the need for system-wide integrity to ensure supply reliability, having critical facilities spatially concentrated (substations), and insignificant storage capacity for emergency supply. This review discusses how energy infrastructure and security are related, how this relationship differs from traditional energy security concepts, and what it may mean for private and policy decisions. Key concepts include redundancy, diversity, resilience, storage, decentralization, and interdependence. The concept of CIP is still relatively new and is likely to evolve over time, possibly away from a "guards, gates, and guns" defensive approach and toward a design approach that yields systems that are inherently harder to successfully attack. Such survivable systems may feature distributed intelligence, control, and operations.
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  • 16
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    Palo Alto, Calif. : Annual Reviews
    Annual Review of Environment and Resources 29 (2004) 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
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  • 17
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    Annual Review of Environment and Resources 29 (2004), S. 31-68 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: The movement of individuals defines a spatial neighborhood that can help determine marine management strategies. Here, I briefly review four fields of marine biology that each differentially illuminate the scale of marine neighborhoods: effects of marine reserves, tagging studies, microchemistry, and population genetics. These suggest adult neighborhood sizes for many demersal fish and invertebrates as small as kilometers and up to 10 to 100 km. Larval dispersal may be shorter than previously suspected: neighborhood sizes of 10 to 100 km for invertebrates and 50 to 200 km for fish are common in current compilations. How can small reserves protect such species? One conceptual framework is to set reserve size based on adult neighborhood sizes of highly fished species and determine spacing of a reserve network based on larval neighborhoods. The multispecies nature of fisheries demands that network designs accommodate different life histories and take into account the way local human communities use marine resources.
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  • 18
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    Annual Review of Environment and Resources 28 (2003), S. 29-57 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: The atmosphere is a chemically complex and dynamic system that interacts significantly with the land, oceans, and ecosystems. Most trace gases emitted into the atmosphere are removed by oxidizing chemical reactions involving ozone and the hydroxyl free radical. The rate of this self-cleansing process is often referred to as the oxidation capacity of the atmosphere. Without this process, atmospheric composition and climate would be very different from what we observe today. The fundamental chemistry involved and the influence of human activity on oxidation capacity are reviewed. Both the current measurements designed to determine rates of oxidation and evidence for changes in oxidizing capacity over recent decades are critically discussed.
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  • 19
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    Annual Review of Environment and Resources 28 (2003), S. 137-167 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Biodiversity, a central component of Earth's life support systems, is directly relevant to human societies. We examine the dimensions and nature of the Earth's terrestrial biodiversity and review the scientific facts concerning the rate of loss of biodiversity and the drivers of this loss. The estimate for the total number of species of eukaryotic organisms possible lies in the 5-15 million range, with a best guess of ~7 million. Species diversity is unevenly distributed; the highest concentrations are in tropical ecosystems. Endemisms are concentrated in a few hotspots, which are in turn seriously threatened by habitat destruction-the most prominent driver of biodiversity loss. For the past 300 years, recorded extinctions for a few groups of organisms reveal rates of extinction at least several hundred times the rate expected on the basis of the geological record. The loss of biodiversity is the only truly irreversible global environmental change the Earth faces today.
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  • 20
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    Annual Review of Environment and Resources 28 (2003), S. 205-241 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: We highlight the complexity of land-use/cover change and propose a framework for a more general understanding of the issue, with emphasis on tropical regions. The review summarizes recent estimates on changes in cropland, agricultural intensification, tropical deforestation, pasture expansion, and urbanization and identifies the still unmeasured land-cover changes. Climate-driven land-cover modifications interact with land-use changes. Land-use change is driven by synergetic factor combinations of resource scarcity leading to an increase in the pressure of production on resources, changing opportunities created by markets, outside policy intervention, loss of adaptive capacity, and changes in social organization and attitudes. The changes in ecosystem goods and services that result from land-use change feed back on the drivers of land-use change. A restricted set of dominant pathways of land-use change is identified. Land-use change can be understood using the concepts of complex adaptive systems and transitions. Integrated, place-based research on land-use/land-cover change requires a combination of the agent-based systems and narrative perspectives of understanding. We argue in this paper that a systematic analysis of local-scale land-use change studies, conducted over a range of timescales, helps to uncover general principles that provide an explanation and prediction of new land-use changes.
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  • 21
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    Annual Review of Environment and Resources 28 (2003), S. 359-399 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: The total world catch from marine and freshwater wild stocks has peaked and may be slightly declining. There appear to be few significant resources to be developed, and the majority of the world's fish stocks are intensively exploited. Many marine ecosystems have been profoundly changed by fishing and other human activities. Although most of the world's major fisheries continue to produce substantial sustainable yield, a number have been severely overfished, and many more stocks appear to be heading toward depletion. The world's fisheries continue to be heavily subsidized, which encourages overfishing and provides society with a small fraction of the potential economic benefits. In most of the world's fisheries there is a "race for fish" in which boats compete to catch the fish before a quota is achieved or the fish are caught by someone else. The race for fish leads to economic inefficiency, poor quality product, and pressure to extract every fish for short-term gain. A number of countries have instituted alternative management practices that eliminate the race for fish and encourage economic efficiency, use lower exploitation rates that deliberately do not attempt to maximize biological yield, and encourage reduced fishing costs and increased value of products. In fisheries where this transition has taken place, we see the potential for future sustainability, but in those fisheries where the race for fish continues, we anticipate further declines in abundance, further loss of jobs and fishing communities, and potential structural change to marine ecosystems.
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  • 22
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    Annual Review of Environment and Resources 28 (2003), S. 401-428 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Green chemistry and engineering is the design of chemical manufacturing systems to minimize their adverse affects on the environment. Thus, a primary goal of green chemistry and engineering is to reduce the environmental impact of chemical processes and chemical manufacturing while simultaneously enhancing the overall process performance. Although it is beneficial to simply reduce the use of organic solvents in chemical processes, green chemistry and engineering goes further, in that it evaluates the entire manufacturing operation to identify techniques that can be applied to minimize the overall process hazard, while maintaining economic practicality. Evaluation of the environmental impacts of the manufacturing process requires a systems approach and appropriate metrics that permit quantitative assessment of environmental hazards. Thus, this chapter begins with a discussion of the drivers for green engineering and the metrics through which processes can be evaluated. Then, the hydroformylation process is used as a case study to illustrate the way in which green chemistry principles can be applied to real processes. Two elements are specifically highlighted: (a) the use of catalysts to facilitate active and selective chemistry and the immobilization of said catalysts within the reactor system, and (b) the development of processes based on benign reaction solvents, and the benefits that can accrue from simplified separations operations.
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  • 23
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    Annual Review of Environment and Resources 28 (2003), S. 429-461 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: International environmental agreements (IEAs), legally binding intergovernmental efforts directed at reducing human impacts on the environment, are common features of global environmental governance. Using a clear definition allowed creation of a comprehensive database [available online at (31)] listing over 700 multilateral agreements (MEAs) and over 1000 bilateral agreements (BEAs), which included treaties, protocols, and amendments that address numerous pollutants; preservation of many species; and, increasingly, protection of various habitats. Research into the factors that explain the timing, content, and membership in environmental agreements clarifies that the interests and power of influential states create pressures for, or constraints on, progress in global environmental governance but that discourse, actors, and processes also play important roles. Variation in the effects of these agreements on environmental behaviors and outcomes often depends as much on characteristics of member countries, the international context, and the underlying environmental problem as on the differences in agreement design.
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    Annual Review of Environment and Resources 29 (2004), S. 69-107 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: The modern technological society mobilizes and uses a very large number of materials. These substances are derived from rocks, sediments, and other natural repositories, and most undergo transformation prior to use. A large fraction of the materials is eventually returned to the environment. Natural processes do the same but not necessarily with the same suite of materials. For purposes of better understanding industrial development and potential environmental impact, it is important to know, even approximately, the elemental cycles of all materials potentially useful for modern technology. In this review, we examine and summarize cycle information for 77 of the first 92 elements in the periodic table. Mobilization calculations demonstrate that human activities likely dominate or strongly perturb the cycles of most of the elements other than the alkalis, alkali earths, and halogens. We propose that this pattern is ultimately related to the aqueous solubilities of the predominant chemical forms of the elements as they occur in nature: Human action dominates the cycles of the elements whose usual forms are highly insoluble, nature those that are highly soluble. Examples of the utility of anthropogenically dominated cycle determinations for resource supply analyses, environmental impact assessment, and public policy are presented and discussed. If the rapid rise in the use of materials by the technological society in the twentieth century continues into the next century, anthropogenic dominance of the cycling of a majority of the elements of the periodic table will only increase.
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    Annual Review of Biochemistry 49 (1980), S. 459-487 
    ISSN: 0066-4154
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
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    Annual Review of Biochemistry 49 (1980), S. 489-515 
    ISSN: 0066-4154
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
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    Annual Review of Biochemistry 49 (1980), S. 517-531 
    ISSN: 0066-4154
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
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    Annual Review of Biochemistry 49 (1980), S. 1005-1061 
    ISSN: 0066-4154
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
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    Annual Review of Biochemistry 49 (1980), S. 1063-1078 
    ISSN: 0066-4154
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    Topics: Chemistry and Pharmacology , Biology
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    Annual Review of Biochemistry 49 (1980), S. 1079-1113 
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    Topics: Chemistry and Pharmacology , Biology
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    Annual Review of Biochemistry 49 (1980), S. 1115-1156 
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    Topics: Chemistry and Pharmacology , Biology
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    Annual Review of Biochemistry 50 (1981), S. 1-23 
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    Annual Review of Biochemistry 50 (1981), S. 815-843 
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    Annual Review of Biochemistry 69 (2000), S. 115-144 
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    Notes: Abstract The faithful segregation of genetic information requires highly orchestrated changes of chromosome structure during the mitotic cell cycle. The linkage between duplicated sister DNAs is established during S phase and maintained throughout G2 phase (cohesion). In early mitosis, dramatic structural changes occur to produce metaphase chromosomes, each consisting of a pair of compacted sister chromatids (condensation). At anaphase onset, a signal is produced to disrupt the linkage between sister chromatids (separation), allowing them to be pulled apart to opposite poles of the cell. This review discusses our current understanding of the three stages of large-scale structural changes of chromosomes in eukaryotic cells. Recent genetic and biochemical studies have identified key components involved in these processes and started to uncover hitherto unexpected functional links between mitotic chromosome dynamics and other important chromosome functions.
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    Annual Review of Biochemistry 69 (2000), S. 69-93 
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    Notes: Abstract An unconventional mechanism for retaining improperly folded glycoproteins and facilitating acquisition of their native tertiary and quaternary structures operates in the endoplasmic reticulum. Recognition of folding glycoproteins by two resident lectins, membrane-bound calnexin and its soluble homolog, calreticulin, is mediated by protein-linked monoglucosylated oligosaccharides. These oligosaccharides contain glucose (Glc), mannose (Man), and N-acetylglucosamine (GlcNAc) in the general form Glc1Man7-9GlcNAc2. They are formed by glucosidase I- and II-catalyzed partial deglucosylation of the oligosaccharide transferred from dolichol diphosphate derivatives to Asn residues in nascent polypeptide chains (Glc3Man9GlcNAc2). Further deglucosylation of the oligosaccharides by glucosidase II liberates glycoproteins from their calnexin/calreticulin anchors. Monoglucosylated glycans are then recreated by the UDP-Glc:glycoprotein glucosyltransferase (GT), and thus recognized again by the lectins, only when linked to improperly folded protein moieties, as GT behaves as a sensor of glycoprotein conformations. The deglucosylation-reglucosylation cycle continues until proper folding is achieved. The lectin-monoglucosylated oligosaccharide interaction is one of the alternative ways by which cells retain improperly folded glycoproteins in the endoplasmic reticulum. Although it decreases the folding rate, it increases folding efficiency, prevents premature glycoprotein oligomerization and degradation, and suppresses formation of nonnative disulfide bonds by hindering aggregation and thus allowing interaction of protein moieties of folding glycoproteins with classical chaperones and other proteins that assist in folding.
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    Annual Review of Biochemistry 70 (2001), S. 149-180 
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    Notes: Abstract The three-dimensional structures of tryptophan synthase, carbamoyl phosphate synthetase, glutamine phosphoribosylpyrophosphate amidotransferase, and asparagine synthetase have revealed the relative locations of multiple active sites within these proteins. In all of these polyfunctional enzymes, a product formed from the catalytic reaction at one active site is a substrate for an enzymatic reaction at a distal active site. Reaction intermediates are translocated from one active site to the next through the participation of an intermolecular tunnel. The tunnel in tryptophan synthase is ~25 A in length, whereas the tunnel in carbamoyl phosphate synthetase is nearly 100 A long. Kinetic studies have demonstrated that the individual reactions are coordinated through allosteric coupling of one active site with another. The participation of these molecular tunnels is thought to protect reactive intermediates from coming in contact with the external medium.
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    Annual Review of Biochemistry 70 (2001), S. 1-37 
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    Notes: Abstract I was fortunate to practice science during the last half of the previous century, when many basic biological and biochemical concepts could be experimentally addressed for the first time. My introduction to research involved isolating and identifying intermediates in the niacin biosynthetic pathway. These studies were followed by investigations focused on determining the properties of genes and enzymes essential to metabolism and examining how they were alterable by mutation. The most challenging problem I initially attacked was establishing the colinear relationship between gene and protein. Subsequent research emphasized identification and characterization of regulatory mechanisms that microorganisms use to control gene expression. An elaborate regulatory strategy, transcription attenuation, was discovered that is often based on selection between alternative RNA structures. Throughout my career I enjoyed the excitement of solving basic scientific problems. Most rewarding, however, was the feeling that I was helping young scientists experience the pleasure of performing creative research.
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    Annual Review of Biochemistry 70 (2001), S. 181-208 
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    Notes: Abstract The elaborate process of genomic replication requires a large collection of proteins properly assembled at a DNA replication fork. Several decades of research on the bacterium Escherichia coli and its bacteriophages T4 and T7 have defined the roles of many proteins central to DNA replication. These three different prokaryotic replication systems use the same fundamental components for synthesis at a moving DNA replication fork even though the number and nature of some individual proteins are different and many lack extensive sequence homology. The components of the replication complex can be grouped into functional categories as follows: DNA polymerase, helix destabilizing protein, polymerase accessory factors, and primosome (DNA helicase and DNA primase activities). The replication of DNA derives from a multistep enzymatic pathway that features the assembly of accessory factors and polymerases into a functional holoenzyme; the separation of the double-stranded template DNA by helicase activity and its coupling to the primase synthesis of RNA primers to initiate Okazaki fragment synthesis; and the continuous and discontinuous synthesis of the leading and lagging daughter strands by the polymerases. This review summarizes and compares and contrasts for these three systems the types, timing, and mechanism of reactions and of protein-protein interactions required to initiate, control, and coordinate the synthesis of the leading and lagging strands at a DNA replication fork and comments on their generality.
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    Annual Review of Biochemistry 70 (2001), S. 369-413 
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    Notes: Abstract DNA topoisomerases solve the topological problems associated with DNA replication, transcription, recombination, and chromatin remodeling by introducing temporary single- or double-strand breaks in the DNA. In addition, these enzymes fine-tune the steady-state level of DNA supercoiling both to facilitate protein interactions with the DNA and to prevent excessive supercoiling that is deleterious. In recent years, the crystal structures of a number of topoisomerase fragments, representing nearly all the known classes of enzymes, have been solved. These structures provide remarkable insights into the mechanisms of these enzymes and complement previous conclusions based on biochemical analyses. Surprisingly, despite little or no sequence homology, both type IA and type IIA topoisomerases from prokaryotes and the type IIA enzymes from eukaryotes share structural folds that appear to reflect functional motifs within critical regions of the enzymes. The type IB enzymes are structurally distinct from all other known topoisomerases but are similar to a class of enzymes referred to as tyrosine recombinases. The structural themes common to all topoisomerases include hinged clamps that open and close to bind DNA, the presence of DNA binding cavities for temporary storage of DNA segments, and the coupling of protein conformational changes to DNA rotation or DNA movement. For the type II topoisomerases, the binding and hydrolysis of ATP further modulate conformational changes in the enzymes to effect changes in DNA topology.
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    Notes: Abstract The 3-phosphorylated inositol lipids fulfill roles as second messengers by interacting with the lipid binding domains of a variety of cellular proteins. Such interactions can affect the subcellular localization and aggregation of target proteins, and through allosteric effects, their activity. Generation of 3-phosphoinositides has been documented to influence diverse cellular pathways and hence alter a spectrum of fundamental cellular activities. This review is focused on the 3-phosphoinositide lipids, the synthesis of which is acutely triggered by extracellular stimuli, the enzymes responsible for their synthesis and metabolism, and their cell biological roles. Much knowledge has recently been gained through structural insights into the lipid kinases, their interaction with inhibitors, and the way their 3-phosphoinositide products interact with protein targets. This field is now moving toward a genetic dissection of 3-phosphoinositide action in a variety of model organisms. Such approaches will reveal the true role of the 3-phosphoinositides at the organismal level in health and disease.
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    Annual Review of Biochemistry 70 (2001), S. 755-775 
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    Notes: Abstract The signal recognition particle (SRP) and its membrane-associated receptor (SR) catalyze targeting of nascent secretory and membrane proteins to the protein translocation apparatus of the cell. Components of the SRP pathway and salient features of the molecular mechanism of SRP-dependent protein targeting are conserved in all three kingdoms of life. Recent advances in the structure determination of a number of key components in the eukaryotic and prokaryotic SRP pathway provide new insight into the molecular basis of SRP function, and they set the stage for future work toward an integrated picture that takes into account the dynamic and contextual properties of this remarkable cellular machine.
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    Annual Review of Biochemistry 70 (2001), S. 777-810 
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    Notes: Abstract Viral envelope glycoproteins promote viral infection by mediating the fusion of the viral membrane with the host-cell membrane. Structural and biochemical studies of two viral glycoproteins, influenza hemagglutinin and HIV-1 envelope protein, have led to a common model for viral entry. The fusion mechanism involves a transient conformational species that can be targeted by therapeutic strategies. This mechanism of infectivity is likely utilized by a wide variety of enveloped viruses for which similar therapeutic interventions should be possible.
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    Annual Review of Biochemistry 71 (2002), S. 247-273 
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    Notes: Abstract It has been a long-standing challenge to decipher the principles that enable cells to both organize their genomes into compact chromatin and ensure that the genetic information remains accessible to regulatory factors and enzymes within the confines of the nucleus. The discovery of nucleosome remodeling activities that utilize the energy of ATP to render nucleosomal DNA accessible has been a great leap forward. In vitro, these enzymes weaken the tight wrapping of DNA around the histone octamers, thereby facilitating the sliding of histone octamers to neighboring DNA segments, their displacement to unlinked DNA, and the accumulation of patches of accessible DNA on the surface of nucleosomes. It is presumed that the collective action of these enzymes endows chromatin with dynamic properties that govern all nuclear functions dealing with chromatin as a substrate. The diverse set of ATPases that qualify as the molecular motors of the nucleosome remodeling process have a common history and are part of a superfamily. The physiological context of their remodeling action builds on the association with a wide range of other proteins to form distinct complexes for nucleosome remodeling. This review summarizes the recent progress in our understanding of the mechanisms underlying the nucleosome remodeling reaction, the targeting of remodeling machines to selected sites in chromatin, and their integration into complex regulatory schemes.
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    Annual Review of Biochemistry 71 (2002), S. 165-189 
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    Notes: Abstract Ribonuclease P (RNase P) is an essential endonuclease that acts early in the tRNA biogenesis pathway. This enzyme catalyzes cleavage of the leader sequence of precursor tRNAs (pre-tRNAs), generating the mature 5' end of tRNAs. RNase P activities have been identified in Bacteria, Archaea, and Eucarya, as well as organelles. Most forms of RNase P are ribonucleoproteins, i.e., they consist of an essential RNA subunit and protein subunits, although the composition of the enzyme in mitochondria and chloroplasts is still under debate. The recent purification of the eukaryotic nuclear RNase P has demonstrated a significantly larger protein content compared to the bacterial enzyme. Moreover, emerging evidence suggests that the eukaryotic RNase P has evolved into at least two related nuclear enzymes with distinct functions, RNase P and RNase MRP. Here we review current information on RNase P, with emphasis on the composition, structure, and functions of the eukaryotic nuclear holoenzyme, and its relationship with RNase MRP.
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    Annual Review of Biochemistry 71 (2002), S. 333-374 
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    Notes: Abstract The maintenance of the eukaryotic genome requires precisely coordinated replication of the entire genome each time a cell divides. To achieve this coordination, eukaryotic cells use an ordered series of steps to form several key protein assemblies at origins of replication. Recent studies have identified many of the protein components of these complexes and the time during the cell cycle they assemble at the origin. Interestingly, despite distinct differences in origin structure, the identity and order of assembly of eukaryotic replication factors is highly conserved across all species. This review describes our current understanding of these events and how they are coordinated with cell cycle progression. We focus on bringing together the results from different organisms to provide a coherent model of the events of initiation. We emphasize recent progress in determining the function of the different replication factors once they have been assembled at the origin.
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    Annual Review of Biochemistry 53 (1984), S. 537-572 
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    Annual Review of Biochemistry 71 (2002), S. 307-331 
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    Notes: Abstract The core apparatus that regulates circadian rhythm has been extensively studied over the past five years. A looming question remains, however, regarding how this apparatus is adjusted to maintain coordination between physiology and the changing environment. The diversity of stimuli and input pathways that gain access to the circadian clock are summarized. Cellular metabolic states could serve to link physiologic perception of the environment to the circadian oscillatory apparatus. A simple model, integrating biochemical, cellular, and physiologic data, is presented to account for the connection of cellular metabolism and circadian rhythm.
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    Annual Review of Biochemistry 71 (2002), S. 375-403 
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    Notes: Abstract Ubiquitous in eukaryotic cells, the La protein associates with the 3' termini of many newly synthesized small RNAs. RNAs bound by the La protein include all nascent transcripts made by RNA polymerase III as well as certain small RNAs synthesized by other RNA polymerases. Recent genetic and biochemical analyses have revealed that binding by the La protein protects the 3' ends of these RNAs from exonucleases. This La-mediated stabilization is required for the normal pathway of pre-tRNA maturation, facilitates assembly of small RNAs into functional RNA-protein complexes, and contributes to nuclear retention of certain small RNAs. Studies of mutant La proteins have given some insights into how the La protein specifically recognizes its RNA targets. However, many questions remain regarding the molecular mechanisms by which La protein binding influences multiple steps in small RNA biogenesis. This review focuses on the roles of the La protein in small RNA biogenesis and also discusses data that implicate the La protein in the translation of specific mRNAs.
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    Annual Review of Biochemistry 71 (2002), S. 537-592 
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    Notes: Abstract The ATP-binding cassette (ABC) transporters are a family of large proteins in membranes and are able to transport a variety of compounds through membranes against steep concentration gradients at the cost of ATP hydrolysis. The available outline of the human genome contains 48 ABC genes; 16 of these have a known function and 14 are associated with a defined human disease. Major physiological functions of ABC transporters include the transport of lipids, bile salts, toxic compounds, and peptides for antigen presentation or other purposes. We review the functions of mammalian ABC transporters, emphasizing biochemical mechanisms and genetic defects. Our overview illustrates the importance of ABC transporters in human physiology, toxicology, pharmacology, and disease. We focus on three topics: (a) ABC transporters transporting drugs (xenotoxins) and drug conjugates. (b) Mammalian secretory epithelia using ABC transporters to excrete a large number of substances, sometimes against a steep concentration gradient. Several inborn errors in liver metabolism are due to mutations in one of the genes for these pumps; these are discussed. (c) A rapidly increasing number of ABC transporters are found to play a role in lipid transport. Defects in each of these transporters are involved in human inborn or acquired diseases.
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    Annual Review of Biochemistry 71 (2002), S. 755-781 
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    Notes: Abstract The existence and function of actin in the nucleus has been hotly debated for forty years. Recently, beta-actin was found to be a component of mammalian SWI/SNF-like BAF chromatin remodeling complexes and still more recently other SWI/SNF-related chromatin remodeling complexes in yeast, flies, and man. Although the function of actin in these chromatin remodeling complexes is only starting to be explored, the fact that actin is one of the most regulated proteins in the cell suggests that control of nuclear actin may be a critical regulatory point in the control of chromatin remodeling. Actin rapidly shuttles between the nucleus and the cytoplasm offering additional sites and modes of regulation. In addition, actin-related proteins (Arps) are also components of these chromatin remodeling complexes and have been implicated in transcriptional control in yeast. The observation that the BAF chromatin remodeling complex in which actin was originally identified, is also a human tumor suppressor complex necessary for the actions of the retinoblastoma protein indicates that the study of nuclear actin is likely to contribute to understanding cell growth control.
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    Annual Review of Biochemistry 71 (2002), S. 847-885 
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    Notes: Abstract Enzymes are called upon to differ greatly in the difficulty of the tasks that they perform. The catalytic proficiency of an enzyme can be evaluated by comparing the second-order rate constant (kcat/Km) with the rate of the spontaneous reaction in neutral solution in the absence of a catalyst. The proficiencies of enzymes, measured in this way, are matched by their affinity constants for the altered substrate in the transition state. These values vary from approximately ~109 M-1 for carbonic anhydrase to ~1023 M-1 for yeast orotidine 5'-phosphate decarboxylase (ODCase). ODCase turns its substrate over with a half-time of 18 ms, in a reaction that proceeds in its absence with a half-time of 78 million years in neutral solution. ODCase differs from other decarboxylases in that its catalytic activity does not depend on the presence of metals or other cofactors, or on the formation of a covalent bond to the substrate. Several mechanisms of transition state stabilization are considered in terms of ODCase crystal structures observed in the presence and absence of bound analogs of the substrate, transition state, and product. Very large connectivity effects are indicated by the results of experiments testing how transition state stabilization is affected by the truncation of binding determinants of the substrate and the active site.
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    Annual Review of Biochemistry 72 (2003), S. 743-781 
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    Topics: Chemistry and Pharmacology , Biology
    Notes: Abstract The p21-activated kinases (PAKs) 1-3 are serine/threonine protein kinases whose activity is stimulated by the binding of active Rac and Cdc42 GTPases. Our understanding of the regulation and biology of these important signaling proteins has increased tremendously since their discovery in the mid-1990s. PAKs 1-3 are activated by a variety of GTPase-dependent and -independent mechanisms. This complexity reflects the contributions of PAK function in many cellular signaling pathways and the need to carefully control PAK action in a highly localized manner. PAKs serve as important regulators of cytoskeletal dynamics and cell motility, transcription through MAP kinase cascades, death and survival signaling, and cell-cycle progression. Consequently, PAKs have also been implicated in a number of pathological conditions and in cell transformation. We propose here a key role for PAK action in coordinating the dynamics of the actin and microtubule cytoskeletons during directional motility of cells, as well as in other functions requiring cytoskeletal polarization.
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    Annual Review of Biochemistry 73 (2004), S. 269-292 
    ISSN: 0066-4154
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
    Notes: The structures of the Ca2+-ATPase (SERCA1a) have been determined for five different states by X-ray crystallography. Detailed comparison of the structures in the Ca2+ bound form and unbound (but thapsigargin bound) form reveals that very large rearrangements of the transmembrane helices take place accompanying Ca2+ dissociation and binding and that they are mechanically linked with equally large movements of the cytoplasmic domains. The meanings of the rearrangements of the transmembrane helices and those of the cytoplasmic domains as well as the mechanistic roles of phosphorylation are now becoming clear. Furthermore, the roles of critical amino acid residues identified by extensive mutagenesis studies are becoming evident in terms of atomic structure.
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    Annual Review of Biochemistry 73 (2004), S. 467-489 
    ISSN: 0066-4154
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
    Notes: The bacterial TolC protein plays a common role in the expulsion of diverse molecules, which include protein toxins and antibacterial drugs, from the cell. TolC is a trimeric 12-stranded alpha/beta barrel, comprising an alpha-helical trans-periplasmic tunnel embedded in the outer membrane by a contiguous beta-barrel channel. This structure establishes a 140 A long single pore fundamentally different to other membrane proteins and presents an exit duct to substrates, large and small, engaged at specific inner membrane translocases. TolC is open to the outside medium but is closed at its periplasmic entrance. When TolC is recruited by a substrate-laden translocase, the entrance is opened to allow substrate passage through a contiguous machinery spanning the entire cell envelope, from the cytosol to the external environment. Transition to the transient open state is achieved by an iris-like mechanism in which entrance alpha-helices undergo an untwisting realignment, thought to be stabilized by interaction with periplasmic helices of the translocase. TolC family proteins are ubiquitous among gram-negative bacteria, and the conserved entrance aperture presents a possible cheomotherapeutic target in multidrug-resistant pathogens.
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    Annual Review of Biochemistry 73 (2004), S. 177-208 
    ISSN: 0066-4154
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
    Notes: Telomeres are essential for genome stability in all eukaryotes. Changes in telomere functions and the associated chromosomal abnormalities have been implicated in human aging and cancer. Telomeres are composed of repetitive sequences that can be maintained by telomerase, a complex containing a reverse transcriptase (hTERT in humans and Est2 in budding yeast), a template RNA (hTERC in humans and Tlc1 in yeast), and accessory factors (the Est1 proteins and dyskerin in humans and Est1, Est3, and Sm proteins in budding yeast). Telomerase is regulated in cis by proteins that bind to telomeric DNA. This regulation can take place at the telomere terminus, involving single-stranded DNA-binding proteins (POT1 in humans and Cdc13 in budding yeast), which have been proposed to contribute to the recruitment of telomerase and may also regulate the extent or frequency of elongation. In addition, proteins that bind along the length of the telomere (TRF1/TIN2/tankyrase in humans and Rap1/Rif1/Rif2 in budding yeast) are part of a negative feedback loop that regulates telomere length. Here we discuss the details of telomerase and its regulation by the telomere.
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    Annual Review of Biochemistry 73 (2004), S. 559-587 
    ISSN: 0066-4154
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
    Notes: Protein S-palmitoylation is the thioester linkage of long-chain fatty acids to cysteine residues in proteins. Addition of palmitate to proteins facilitates their membrane interactions and trafficking, and it modulates protein-protein interactions and enzyme activity. The reversibility of palmitoylation makes it an attractive mechanism for regulating protein activity, and this feature has generated intensive investigation of this modification. The regulation of palmitoylation occurs through the actions of protein acyltransferases and protein acylthioesterases. Identification of the protein acyltransferases Erf2/Erf4 and Akr1 in yeast has provided new insight into the palmitoylation reaction. These molecules work in concert with thioesterases, such as acyl-protein thioesterase 1, to regulate the palmitoylation status of numerous signaling molecules, ultimately influencing their function. This review discusses the function and regulation of protein palmitoylation, focusing on intracellular proteins that participate in cell signaling or protein trafficking.
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    Annual Review of Biochemistry 73 (2004), S. 991-1018 
    ISSN: 0066-4154
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
    Notes: Cytochrome P450 enzymes are heme-containing monooxygenases that are named after an absorption band at 450 nm when complexed with carbon monoxide. They catalyze a wide variety of reactions and are unique in their ability to hydroxylate nonactivated hydrocarbons. P450 enzymes are involved in numerous biological processes, which include the biosynthesis of lipids, steroids, antibiotics, and the degradation of xenobiotics. In line with the variety of reactions catalyzed, the size of their substrates varies significantly. Some P450s have open active sites (e.g., BM3), and some have shielded active sites that open only transiently (e.g., P450cam), whereas others bind the substrate only when attached to carrier proteins (e.g., Oxy proteins). Structural aspects of both organic and gaseous ligand binding and electron transfer are described.
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    Annual Review of Biochemistry 73 (2004), S. 241-268 
    ISSN: 0066-4154
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
    Notes: ATP-binding cassette (ABC) transporters couple ATP hydrolysis to the uptake and efflux of solutes across the cell membrane in bacteria and eukaryotic cells. In bacteria, these transporters are important virulence factors because they play roles in nutrient uptake and in secretion of toxins and antimicrobial agents. In humans, many diseases, such as cystic fibrosis, hyperinsulinemia, and macular dystrophy, are traced to defects in ABC transporters. Recent advances in structural determination and functional analysis of bacterial ABC transporters, reviewed herein, have greatly increased our understanding of the molecular mechanism of transport in this transport superfamily.
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    Annual Review of Biochemistry 73 (2004), S. 791-836 
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    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
    Notes: Just as Darwinian evolution in nature has led to the development of many sophisticated enzymes, Darwinian evolution in vitro has proven to be a powerful approach for obtaining similar results in the laboratory. This review focuses on the development of nucleic acid enzymes starting from a population of random-sequence RNA or DNA molecules. In order to illustrate the principles and practice of in vitro evolution, two especially well-studied categories of catalytic nucleic acid are considered: RNA enzymes that catalyze the template-directed ligation of RNA and DNA enzymes that catalyze the cleavage of RNA. The former reaction, which involves attack of a 2'- or 3'-hydroxyl on the alpha-phosphate of a 5'-triphosphate, is more difficult. It requires a comparatively larger catalytic motif, containing more nucleotides than can be sampled exhaustively within a starting population of random-sequence RNAs. The latter reaction involves deprotonation of the 2'-hydroxyl adjacent to the cleavage site, resulting in cleaved products that bear a 2',3'-cyclic phosphate and 5'-hydroxyl. The difficulty of this reaction, and therefore the complexity of the corresponding DNA enzyme, depends on whether a catalytic cofactor, such as a divalent metal cation or small molecule, is present in the reaction mixture.
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    Annual Review of Biochemistry 73 (2004), S. 147-176 
    ISSN: 0066-4154
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
    Notes: The genetic code is established by the aminoacylation of transfer RNA, reactions in which each amino acid is linked to its cognate tRNA that, in turn, harbors the nucleotide triplet (anticodon) specific to the amino acid. The accuracy of aminoacylation is essential for building and maintaining the universal tree of life. The ability to manipulate and expand the code holds promise for the development of new methods to create novel proteins and to understand the origins of life. Recent efforts to manipulate the genetic code have fulfilled much of this potential. These efforts have led to incorporation of nonnatural amino acids into proteins for a variety of applications and have demonstrated the plausibility of specific proposals for early evolution of the code.
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    Annual Review of Biochemistry 73 (2004), S. 39-85 
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    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
    Notes: DNA damage is a relatively common event in the life of a cell and may lead to mutation, cancer, and cellular or organismic death. Damage to DNA induces several cellular responses that enable the cell either to eliminate or cope with the damage or to activate a programmed cell death process, presumably to eliminate cells with potentially catastrophic mutations. These DNA damage response reactions include: (a) removal of DNA damage and restoration of the continuity of the DNA duplex; (b) activation of a DNA damage checkpoint, which arrests cell cycle progression so as to allow for repair and prevention of the transmission of damaged or incompletely replicated chromosomes; (c) transcriptional response, which causes changes in the transcription profile that may be beneficial to the cell; and (d) apoptosis, which eliminates heavily damaged or seriously deregulated cells. DNA repair mechanisms include direct repair, base excision repair, nucleotide excision repair, double-strand break repair, and cross-link repair. The DNA damage checkpoints employ damage sensor proteins, such as ATM, ATR, the Rad17-RFC complex, and the 9-1-1 complex, to detect DNA damage and to initiate signal transduction cascades that employ Chk1 and Chk2 Ser/Thr kinases and Cdc25 phosphatases. The signal transducers activate p53 and inactivate cyclin-dependent kinases to inhibit cell cycle progression from G1 to S (the G1/S checkpoint), DNA replication (the intra-S checkpoint), or G2 to mitosis (the G2/M checkpoint). In this review the molecular mechanisms of DNA repair and the DNA damage checkpoints in mammalian cells are analyzed.
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    Annual Review of Biochemistry 73 (2004), S. 953-990 
    ISSN: 0066-4154
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
    Notes: Opioid receptors belong to the large superfamily of seven transmembrane-spanning (7TM) G protein-coupled receptors (GPCRs). As a class, GPCRs are of fundamental physiological importance mediating the actions of the majority of known neurotransmitters and hormones. Opioid receptors are particularly intriguing members of this receptor family. They are activated both by endogenously produced opioid peptides and by exogenously administered opiate compounds, some of which are not only among the most effective analgesics known but also highly addictive drugs of abuse. A fundamental question in addiction biology is why exogenous opioid drugs, such as morphine and heroin, have a high liability for inducing tolerance, dependence, and addiction. This review focuses on many aspects of opioid receptors with the aim of gaining a greater insight into mechanisms of opioid tolerance and dependence.
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    Annual Review of Biochemistry 73 (2004), S. 705-748 
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    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
    Notes: Mechanical processes are involved in nearly every facet of the cell cycle. Mechanical forces are generated in the cell during processes as diverse as chromosomal segregation, replication, transcription, translation, translocation of proteins across membranes, cell locomotion, and catalyzed protein and nucleic acid folding and unfolding, among others. Because force is a product of all these reactions, biochemists are beginning to directly apply external forces to these processes to alter the extent or even the fate of these reactions hoping to reveal their underlying molecular mechanisms. This review provides the conceptual framework to understand the role of mechanical force in biochemistry.
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    Annual Review of Biochemistry 73 (2004), S. 837-859 
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    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
    Notes: The fastest simple, kinetically two-state protein folds a million times more rapidly than the slowest. Here we review many recent theories of protein folding kinetics in terms of their ability to qualitatively rationalize, if not quantitatively predict, this fundamental experimental observation.
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    Annual Review of Biochemistry 73 (2004), S. 1-37 
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    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
    Notes: I had the good luck to start research at the dawn of molecular biology when it was possible to ask fundamental questions about the nature of the nucleic acids and how information is transferred in living systems. The search for answers led me into many different areas, often with the question of how molecular structure leads to biological function. Early work in this period provided some of the roots supporting the current explosive developments in life sciences. Here I give a brief account of my development, describe some contributions, and provide a hint of the exhilaration in discovering new things. Most of all, I had the good fortune to have inspiring teachers, stimulating colleagues, and excellent students.
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    Annual Review of Environment and Resources 26 (2001), S. 1-26 
    ISSN: 1056-3466
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: The central question of my scientific work has been, what is and ought to be the human use of the earth? It has been pursued collectively, with mentor, colleagues, students, and friends as a set of research questions related to hazards, hunger, and sustainable development. Regarding hazard, I tried to understand why people persist in occupying areas subject to natural and technological hazards and how adaptation made this possible. An extended stay in Africa to research both environment and development led to new queries. Why does hunger persist amid a world of plenty, and what can be done to end it? Can there be a transition to sustainability that over the next two generations would meet human needs and reduce hunger and poverty while maintaining the essential life support systems of the planet? All three themes and the research methods used to pursue them come together in an emerging sustainability science.
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    Annual Review of Environment and Resources 26 (2001), S. 83-115 
    ISSN: 1056-3466
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Energy conservation in Chinese residential buildings merits attention in part due to China's large population, increased standard of living, and high volume of construction. This paper focuses on three major themes: issues exerting an upward pressure on residential energy use, policy for promoting energy conservation, and technical opportunities to decrease energy use and increase comfort. An increase in total floor area, increasing electric appliance ownership, and an increase in demand for heating and cooling characterize the residential sector. Space heating remains the dominant energy end-use. Relatively new buildings in cold regions of China, while a marked improvement over earlier construction, still suffer from inadequate insulation, leaky windows, and lack of attention to construction quality. Energy-conservation standards have addressed these issues in part, but further effort is needed to ensure code compliance. A survey of prospective homeowners shows that energy-efficient housing would best be promoted by marketing the combined benefits of natural lighting and ventilation, better quality, and savings in heating and air-conditioning energy costs, rather than only promoting a dwelling as "environmentally friendly" or offering reduced heating bills. Reviewed technologies concentrate on reductions in heating and cooling energy through improved site layout, building design, building envelope materials, ventilation, and alternative cooling equipment.
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    Annual Review of Environment and Resources 26 (2001), S. 167-200 
    ISSN: 1056-3466
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract The interdependency of aircraft technological systems, the global reach of the aviation transport industry, and the uncertainty surrounding potential atmospheric effects have made defining the relationship between aviation and environmental impact an arduous task. Air travel continues to experience the fastest growth of all modes of transport, and although the energy intensity of the aviation transport system continues to decline, fuel use and total emissions have steadily risen. This trend, which represents a conflict between growth and environmental impact, has motivated the aircraft manufacturing and airline industries, the scientific community, and governmental bodies to consider what pace of emissions reduction is acceptable. This paper analyzes the historical influence of aircraft performance on cost to examine the potential pace of future efficiency improvements and emissions reduction. Technological and operational influences on aircraft energy intensity are quantified and correlated with direct operating cost and aircraft price using analytical and statistical models built upon historical data for US airlines. The energy intensity reduction potential and economic characteristics of future aircraft are also projected, through extrapolations of historical trends in aircraft technology and operations.
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    Annual Review of Environment and Resources 28 (2003), S. 463-492 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Widespread observations of organic pollutant compounds in vegetation, soil, animals, and human tissue have motivated research on more accurate characterizations of chemical transport over regional, continental, and global scales. Efforts to assess human and ecosystem exposure to contaminants from multiple environmental media have been evolving over the last several decades. In this review, we summarize the development and evolution of the multimedia mass-balance approach to pollutant fate and exposure evaluation and illustrate some of the calculations used in multimedia assessments. The concepts that form the foundation of Mackay-type mass-balance compartment models are described, and the ongoing efforts to use multimedia models to quantify human exposures are discussed. A series of case studies of varying complexity are used to illustrate capabilities and limitations of selected multimedia approaches. We look to the future and consider current challenges and opportunities in the field of multimedia contaminant fate and exposure modeling.
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    Annual Review of Environment and Resources 28 (2003), S. 493-519 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: The geographic context is essential both for environmental research and for policy-oriented environmental management. Geographic information systems are as a result increasingly important computing applications in this domain, and an understanding of the underlying principles of geographic information science is increasingly essential to sound scientific practice. The review begins by defining terms. Four major sections follow that discuss advances in GIS analysis and modeling, in the supply of geographic data for GIS, in software design, and in GIS representation. GIS-based modeling is constrained in part by architecture, but a number of recent products show promise, and GIS continues to support modeling through the coupling of software. The GIS data supply has benefited from a range of new satellite-based sensors and from developments in ground-based sensor networks. GIS software design is being revolutionized by two developments in the information technology mainstream: the trend to component-based software and object-oriented data modeling. Advances in GIS representation focus largely on time, the third spatial dimension, and uncertainty. References are provided to the more important and recent literature. The concluding section identifies three significant and current trends: toward increasing interoperability of data and services, increasing mobility of information technology, and increasing capabilities for dynamic simulation.
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    Annual Review of Environment and Resources 29 (2004), S. 301-344 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: We review the economics of electricity generated, or conserved, from a diverse range of fossil-fuel, nuclear, and renewable energy sources and energy efficiency options. At the same time, we survey the methods used to compute the costs of generated and delivered electricity and power, including bus bar costs; wholesale and retail marketplace costs; life-cycle accounting systems; premiums associated with political, social, and environmental risks; costs that reflect explicit and implicit subsidies; costs inclusive of externalities calculated by a variety of means; and net costs, including a range of proposed and potential environmental tax regimes. These diverse and at times conflicting analytic methods reflect a wide range of assumptions and biases in how the inputs for energy generation as well as how the subsidies and social and environmental costs are computed or, is often the case, neglected. This review and tutorial provides side-by-side comparisons of these methods, international cost comparisons, as well as analysis of the magnitude and effects of a range of technological, market-based, and subsidy-driven costs on the final price of electricity. Comparability of costs between supply and conservation technologies and methods in the energy sector has consistently been a problem, and the diversity of energy cost accounting schemes provides significant opportunity for very different arguments to be made for specific technologies, regulatory and market regimes, and a wide range of social and environmental taxes. We provide a review of the tools and a commentary on how these methods are used to determine the cost of energy services. The conclusion contains an analysis of how these methods of energy valuation are similar, how they differ, as well as an analysis of the explicit and implicit assumptions that underlie each approach.
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    Annual Review of Environment and Resources 29 (2004), S. 1-30 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: The effect of anthropogenic emissions from activities, such as fossil-fuel, biomass, and biofuel burning; transportation; and land-clearing; have a profound impact on the climate system. The impact of these activities is manifested in observed changes in temperature, precipitation, sea-level rise, melting of glaciers, air quality, health, and agriculture yields, to name a few. The obvious question to ask is the role that these different processes play in affecting climate and what action could one impose to curtail or constrain adverse human impacts on climate. Greenhouse gases have long been studied, as they play a major role in changing climate. But over the past 10-20 years, aerosols have emerged as the other big contenders in climate change studies. This review focuses on the current understanding of the effects of aerosols on climate, with an emphasis on the thermodynamical and indirect aerosol effects. We also examine available measurements that could be used to decipher the aerosol influence on climate, with an outlook on how the uncertainties in aerosol effects may impact future climate predictions and policy changes.
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    Annual Review of Environment and Resources 29 (2004), S. 143-179 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Plant genetic resources provide the biological underpinning for agriculture and food production. No nation is independent in terms of these resources. Interdependence levels are high among countries. Policy impediments to access may subside, increasing already substantial germplasm flows. Serious questions exist, however, about the health and availability of the actual resources. Genebank collections contain many unintended duplicates, making aggregate numbers seem larger than they really are. Information about individual accessions, particularly those found in situ, is often poor, reducing frequency and efficiency of use and ultimate benefits. Although not firmly established today, the link between conservation and use must be strengthened.
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    Annual Review of Environment and Resources 29 (2004), S. 261-299 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Managed grazing covers more than 25% of the global land surface and has a larger geographic extent than any other form of land use. Grazing systems persist under marginal bioclimatic and edaphic conditions of different biomes, leading to the emergence of three regional syndromes inherent to global grazing: desertification, woody encroachment, and deforestation. These syndromes have widespread but differential effects on the structure, biogeochemistry, hydrology, and biosphere-atmosphere exchange of grazed ecosystems. In combination, these three syndromes represent a major component of global environmental change.
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    Annual Review of Environment and Resources 29 (2004), S. 205-259 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: This review critically surveys an extensive literature on mining, development, and environment. It identifies a significant broadening over time in the scope of the environment question as it relates to mining, from concerns about landscape aesthetics and pollution to ecosystem health, sustainable development, and indigenous rights. A typology compares and contrasts four distinctive approaches to this question: (a) technology and management-centered accounts, defining the issue in terms of environmental performance; (b) public policy studies on the design of effective institutions for capturing benefits and allocating costs of resource development; (c) structural political economy, highlighting themes of external control, resource rights, and environmental justice; and (d) cultural studies, which illustrate how mining exemplifies many of society's anxieties about the social and environmental effects of industrialization and globalization. Each approach is examined in detail.
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    Annual Review of Environment and Resources 29 (2004), S. 383-419 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Energy and energy technologies have a central role in social and economic development at all scales, from household and community to regional and national. Among its welfare effects, energy is closely linked with public health both positively and negatively, the latter through environmental pollution and degradation. We review the current research on how energy use and energy technologies influence public health, emphasizing the risks associated with indoor and ambient air pollution from energy use, and the links between the local and global environmental health impacts of energy use. This review illustrates that, despite their large public health implications, most energy policies and programs in the developing world are fundamentally treated as components of overall economic development, without explicit assessment of their health benefits or hazards. Closer integration of health in energy management can facilitate the development of policies and programs that increase welfare and minimize negative health outcomes. Renewable energy technologies are used as an example of how an integrated energy-health approach can be used in policy analysis and formulation.
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    Annual Review of Environment and Resources 29 (2004), S. 345-381 
    ISSN: 1543-5938
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: New energy efficiency policies have been introduced around the world. Historically, most energy models were reasonably equipped to assess the impact of classical policies, such as a subsidy or change in taxation. However, these tools are often insufficient to assess the impact of alternative policy instruments. We evaluate the so-called engineering economic models used to assess future industrial energy use. Engineering economic models include the level of detail commonly needed to model the new types of policies considered. We explore approaches to improve the realism and policy relevance of engineering economic modeling frameworks. We also explore solutions to strengthen the policy usefulness of engineering economic analysis that can be built from a framework of multidisciplinary cooperation. The review discusses the main modeling approaches currently used and evaluates the weaknesses in current models. We focus on the needs to further improve the models. We identify research priorities for the modeling framework, technology representation in models, policy evaluation, and modeling of decision-making behavior.
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    Annual Review of Biochemistry 49 (1980), S. 765-811 
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    Topics: Chemistry and Pharmacology , Biology
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    Annual Review of Biochemistry 49 (1980), S. 813-841 
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    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
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    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Biochemistry 49 (1980), S. 845-876 
    ISSN: 0066-4154
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Chemistry and Pharmacology , Biology
    Type of Medium: Electronic Resource
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