Xem 1-20 trên 63 kết quả Comparing water
  • It is widely accepted that irrigation allows for the increase and stability in agrarian yields, being a necessary tool to support food supplies and necessities for certain raw materials in the world. However, irrigated agriculture is also considered the most significant fresh water consumer and one of the main causes of pollution, degradation and depletion of natural resources. These impacts are primarily related to changes in the water cycle, salinization of agricultural soils, and salinization and pollution of water resources due to the use of agrochemicals....

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  • Tuyển tập các báo cáo nghiên cứu về lâm nghiệp được đăng trên tạp chí lâm nghiệp quốc tế đề tài: Compared water deficit response of two Populus x euramericana clones, Luisa Avanzo and Dorskamp...

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  • Effective solutions to water quality challenges exist and have been implemented in a number of places. It is time for a global focus on protecting and improving the quality of the world’s freshwater resources. There are three fundamental solutions to water quality problems: (1) prevent pollution; (2) treat polluted water; and (3) restore ecosystems.

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  • Preconstruction planning should be used to sequence major grading activities to minimize the exposure time of graded or denuded areas. The erosion prevention and sediment control measures and/or plans shall be modified as necessary so that they are effective at all times throughout the course of the project. The Operator will be responsible for the implementation and execution of all storm water runoff controls.

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  • In 1972, the Clean Water Act (CWA) delineated the basic structure for regulating discharges of pollutants into waters and for establishing quality standards for surface waters under the authority of EPA [10]. Under the CWA’s National Pollutant Discharge Elimination System program, stormwater permits were required for sediment runoff from construction sites and discharges of pollutants into surface waters [11]. The permitting system requires adoption of technology-based and water quality-based effluent limits [11,12].

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  • There are two main reasons why the chemical process industry should be motivated to reduce energy consumption and CO 2 emissions: rising concerns in companies, the public and scientifi c community about climate change or global warming, and the increasing fraction of energy in manufacturing costs. ‘ Climate change ’ [1] in this context, means a change of climate, which is attributed directly or indirectly to human activity that alters the composition of the global atmosphere and which is in addition to natural climate variability observed over comparable time periods....

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  • Economists have long advocated pollution taxes as a policy to improve water quality. One of the reasons water effluent taxes are embraced by economists interested in market-based policies is that sources of water pollution are varied and difficult to assess individually in terms of control costs. In principle, taxes overcome this problem. With a price—the tax—applied to pollution emissions, firms compare the price to their costs of emissions control. If the price is higher than control costs, they reduce emissions rather than pay the tax.

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  • Error analysis was first introduced by Fries (1945) and Lado (1957) who have calimed that foreign or second language learners’ errors could be predicted on the basis of the differences between the learners native and second languages. They have also suggested that where the aspects of the target language are similar to those of the learners’ native language, learning will be easy; otherwise, it will be difficult and second language learners are expected to make errors.

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  • Understanding the long-term patterns of speciation and extinction may help sci- entists answer some of the biggest questions about today’s patterns of bio diver- sity—such as why the tropics are so diverse. David Jablonski, a paleontologist at the University of Chicago, has tackled the question by analyzing the fossil record of bivalves, noting where they were located, how large their ranges became, and how long they endured. Jablonski’s analysis of 3,599 species from the past 11 million years revealed a striking pattern.

    pdf51p machuavo 19-01-2013 20 6   Download

  • Marine Sediments are:Particles of various sizes derived from a variety of sources that are deposited on the ocean floor.A vast “library” recording geologic, oceanographic and climatic conditions Remarkably complete compared to land Effects of water velocity on transport: rivers and nearshore vs open ocean...

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  • Given the variation in credit scoring methodologies, raw credit scores possess no intrinsic meaning, and comparing raw scores across companies is of limited value. Normalized or “standardized” results afford more meaningful comparisons. Averaged across all companies, the spread in standardized scores between “no minority” and “all minority”2 ZIP Codes was 38.9 percentiles—a very considerable gap.

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  • (BQ) Ebook Wonders California content reader - Grade 3 includes energy; the future of energy; description writing frame; critical thinking; energy and matter; water troubles; compare contrast writing frame; elements and atoms; problem solution writing framel; the atomic age and something else.

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  • Coverage levels that are higher than CAT are called “buy-up” or “additional” coverage. 11 For an additional premium paid by the producer, and partially subsidized by the government, a producer can “buy up” the 50/55 catastrophic coverage to any equivalent level of coverage between 50/100 and 75/100 (i.e., up to 75% of “normal” crop yield and 100% of the estimated market price). In limited areas, production can be insured up to the 85/100 level of coverage. APH policies account for more than 90% of yield-based policies sold.

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  • Only a few studies consider the increased ventilation rate associated with active modes. One study [22] showed that the minute ventilation rate (product of the breathing rate and the volume of air per breath) of cyclists was on average twice that of car commuters (an increase from 12 L min-1 to 24 L min-1 ) and two studies [21, 23] suggest 31 L min-1 , and 40-60 L min-1 for cyclists, respectively. No studies could be found specifically in relation to the exposure of commuters who run to work, though one would expect these to be comparable or higher than those of...

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  • The solid product is a wet sludge of calcium sulfate which can be disposed of easily. So FGD does not eliminate pollution. What it does accomplish is to convert a big problem (emission of large volumes of air contaminated by harmful levels of gaseous SOx) into a small problem (collection and disposal of scrubber sludge). Dealing with the problem of air pollution is not cheap. An FGD system installed in a newly constructed power plant represents about one-third of the total cost of building the entire plant.

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  • The most commonly listed Characterizations of Suspicious Activity (in whole or in part) were BSA/Money Laundering/Structuring and Other – the aggregated totals of which accounted for 85 percent of all reported suspected illicit activity.

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  • The quality of air in Kathmandu valley is much lower than the national and international standards and the occurrence of high level of PM 10 in the atmosphere has become a major health concern. Vehicular emission followed by road re-suspension dust, smoke and dust out of the brick kilns are the main culprits. It is not that there is nothing done to address this grave problem. Various GOs and I/NGOs and private sector alike have shown their concern to address the problem of air pollution in Nepal but they are strikingly insufficient as compared against the magnitude and gravity of...

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  • The Nation continues to face extraordinary financial and fiscal challenges. Signs of progress are already evident as Treasury and the Government as a whole continue to develop and implement an array of efforts to foster continued economic recovery. Realizing the true return on those efforts requires perseverance and patience. However, even as the Government continues its current efforts to foster economic growth, it should not lose sight of the long-term fiscal challenges associated with its social insurance programs compared to expected future levels of revenue.

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  • Endonuclease I is a periplasmic or extracellular enzyme present in many different Proteobacteria. TheendAgene encoding endonuclease I from the psychrophilic and mildly halophilic bacteriumVibrio salmonicidaand from the mesophilic brackish water bacterium Vibrio choleraehave been cloned, over-expressed inEscherichia coli, and purified.

    pdf12p inspiron33 23-03-2013 17 3   Download

  • Competing geophysical/geochemical hypotheses for how Earth’s surface became oxygenated – organic carbon burial, hydrogen escape to space, and changes in the redox state of volcanic gases – are examined and a more biologically-based hypothesis is offered in response. It is argued that compared to the modern oxygenated world, organic carbon burial is of minor importance to the accumulation of oxygen in a mainly anoxic world where aerobic respiration is not globally significant. Thus, for the Paleoproterozoic Great Oxidation Event (GOE) ~ 2.

    pdf27p giamdocamnhac 06-04-2013 27 3   Download

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