Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 60 for “"acid rain"”.
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Acid rain : scenario for solution
Thesis (M.S.)--Massachusetts Institute of Technology, Sloan School of Management, 1989.
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The social construction of acid rain: The paper says it looks like rain today.
… has determined that there were a number of acid rain constructions presented to the public by the Ontario press. Although acid rain had been around since the 1890s, there had been no widespread knowledge among the general public until February 6, 1979, when the press considered the subject …
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Effects of Simulated Acid Rain on Physiological Parameters of Field-Grown Corn and Soybeans
Simulated acid rain has been reported to cause physiological changes in various plant species. Studies were conducted in 1983, 1984, and 1985 to determine the effect of acid rain on some physiological parameters in soybeans (Glycine max L.) and corn (Zea mays L.). Simulated acid rain of pH 3.0, 4.2 …
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Acid rain provisions of the 1990 clean air amendments: affects on residential electric customers
This thesis attempts to explain to what degree residential electricity prices will increase due to compliance with the sulfur dioxide provisions of the 1990 Clean Air Amendments. The Amendments were passed with widely varying estimates of the costs to the final consumer. These estimates ranged from …
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The "technology of compliance" cost : its role in the U.S. Acid Rain Program and implications for joint implementation
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 1997.
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The impact of ozone, water stress, and acid rain on the growth and physiology of fraser fir seedlings
… effects of ozone, water stress, and simulated acidic rain on the growth and physiology of Fraser fir seedlings. In Experiment I, seedlings were first exposed to 2 levels of moisture stress conditioning (MSC) for four weeks, and 3 levels of ozone ( < 0.02, 0.05, and 0.10 ppm) and three levels of …
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Effects of Simulated Acid Rain on Growth and Yield of Field-Grown Corn and Soybeans (Glycine Max, Zea Mays)
… in an effort to help determine the effects of acid rain on corn and soybean growth and production. Two corn (Zea mays L.) and two soybean (Glycine max L.) cultivars were exposed to six simulated rain acidity levels throughout the 1983 and 1984 growing seasons. The field experiments were …
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The combined effects of ozone, sulfur dioxide and simulated acid rain on the growth of three forest tree species
… 4 hr/d, 5d/wk in combination with simulated rain (pHs 5.6, 4.3, 3.0), 1 hr/d, 2 d/wk, for 5 or 6 wk under controlled laboratory conditions. Pollutant exposures resulted in alterations in seedling biomass accumulation, growth rates, changes in carbon allocation among plant parts and …
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Consequences of nitrogen fertilization and soil acidification from acid rain on dissolved carbon and nitrogen stability in the unglaciated Appalachian Mountains
… combustion, has enriched the earth with N and acidified ecosystems. Acid rain is a primary vector of both N fertilization and acidification, initiating a cascade of consequences that alter biogeochemical cycling and global biological structure and function. Studies on N and acid influences are …
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The contribution of scientists to popular literature, their role as expert witnesses and their influence among peers: A case study in the field of acid rain
… published during 1972 to 1987 in the field of acid rain and found that 4.7% (102) of the total population (2,177) of scientists engaged in acid rain research contributed 8.7% (59 items) to the total 677 items in popular magazines, and only.0013% (one item) to the total 747 items from major …
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Categorical semantics and composition of tree transducers
… initial algebras. We prove a new variant of the acid rain theorem for mutually recursive functions where the build function is substituted by a concrete functor. Moreover, we give a symmetric form (i.e. consumer and producer have the same syntactic form) of our new acid rain theorem where fusion …
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The role of ecological barriers in the development of cultural boundaries during the later Holocene of the central Alaska peninsula
… volcanic effects include ash fall, sulfuric acid rain, and sulfur dioxide injected into the atmosphere. The ash fall and sulfuric acid rain from the Aniakchak eruption heavily impacted western Alaska to the northwest of the volcano. The ash fall and acid rain had pronounced negative effects …
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Development of an Atmospheric Fluidized Bed Combustor (AFBC)
… First of these is the ever present problem of acid rain and growing public support for cleaner burning fossil fuels. Second is the increasing demand on public landfills and subsequent need for burning of municipal solid waste. From these factors and their corresponding influences, Western …
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Ruthenium complexes of nitrogen- and sulfur-containing heterocycles
… x}$ and NO$\sb{\rm x}$ which contribute to acid rain production. Our interest in these processes/problems has resulted in studies on interactions of heterocycles with Ru metal centers and the subsequent reactivities of these complexes.
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The Changing Role of Reactive Nitrogen in the Troposphere
… are a key ingredient of fine particulate matter, acid rain, and ozone. However, despite this long-understood importance of reactive oxidized nitrogen (NOy) species, even modern chemical transport models have struggled to accurately represent their chemistry. This thesis spans three projects that …
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Three Essays on the Impacts of Air Pollution and Environmental Policy
… analysis of the design ramifications of the Acid Rain Program’s tradable permit market for sulfur dioxide established by Title IV of the Clean Air Act Amendments of 1990. The study examines how the two-phase approach as well as the initial permit allocation rule affected emissions. These …
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Regulating mercury with the Clear Skies Act : the resulting impacts on innovation, human health, and the global community
… strategy for sulfur dioxide through the 1992 Acid Rain Program, the uniquely dangerous properties of mercury make this market-based regulation risky for certain vulnerable segments of the population. Since its unveiling, the Clear Skies cap and trade approach has been criticized for being too …
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Quantifying macroinvertebrate structural and functional response to stream acidification and subsequent recovery in Shenandoah National Park
Acid rain alters freshwater pH and ion composition, preventing organisms from performing essential bodily functions causing mortality. Macroinvertebrate communities in acidified streams are characterized by species loss in response to physiological stress and altered food quality resulting from the …
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Effect of bidens pilosa L in sulfate removal from industrial wastewater in a hydroponic system
… atmosphere and form sulfur dioxide which causes acid rain when reacted with nitrogenous gases. Acid rain is detrimental to the environment. Ion exchange chromatography is currently used in sulfate removal but it is expensive and energy consuming. This has necessitated the development of an …
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Investigation of Dibenzothiophene Removal from I Organic Phase: Enzymatic Approach vs. Ionic Liquids
… like gasoline and diesel is responsible for acid-rain. The low levels of sulfur in fuels imposed by the environmental regulations of 15 ppm by 2006, have led to the search of alternative methods to comply with these new demands. The conventional process of hydrodesulfurization is unable to …
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