31 Matching Results

Search Results

Advanced search parameters have been applied.
in subjects: "Nitrogen Oxides"  
Results: 1 - 24 next
open access

Diagnosing vegetation injury caused by air pollution

Description: The structure and function of plants in relation to air pollution injury is discussed. The sources, atmospheric chemistry, monitoring data, symptomatology, factors affecting plant response, injury threshold doses, air quality standards, relative sensitivity of plants, and leaf tissue analysis are discussed for major air pollutants. Among the pollutants discussed are: the photochemical oxidants (ozone, PAN, nitrogen oxides, sulfur dioxide, and fluorides). Minor pollutants discussed in the same f… more
Date: February 1, 1978
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

NO/sub 2/ levels in diesel exhaust

Description: The safe operation of diesel-powered equipment in underground mines is predicated on there being sufficient ventilation to dilute the exhaust such that none of the toxicants in the dilute mixture exceed allowable levels. In order to determine the ventilation requirement for an engine, it is necessary to measure levels of the various toxicants in the exhaust. Measurements in the past typically either have excluded nitrogen dioxide or have not provided information on nitrogen dioxide specifically… more
Date: January 1, 1978
Creator: Marshall, W.F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Distinction between the roles of O/sub 2/ and of O/sup -//sub 2/ in biological radiodamage

Description: The paper attempts to elucidate the roles of oxygen and superoxide radical in biological damage due to ionizing radiation. Specifically, the effect of gamma radiation on the survival of T4 bacteriophage and of E. coli B has been investigated. (ACR)
Date: January 1, 1978
Creator: Samuni, A.; Chevion, M.; Halpern, Y. S.; Ilan, Y. A. & Czapski, G.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Investigative study of engine limiting

Description: An experimental study was conducted to determine the effect of cylinder cut-out or ''engine limiting'' on fuel consumption and exhaust emissions for a current technology V-type 8-cylinder engine. Increases in energy conversion efficiency while operating with only 4 cylinders ranged from 10 to 40% compared to operation with 8 cylinders at the same power outputs. The speeds and loads chosen were representative of those required to operate a 4,500-lb vehicle at speeds up to 60 mph. Hydrocarbon emi… more
Date: February 1, 1978
Creator: Bechtold, R.L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Radiolytic gas production from concrete containing Savannah River Plant waste

Description: To determine the extent of gas production from radiolysis of concrete containing radioactive Savannah River Plant waste, samples of concrete and simulated waste were irradiated by /sup 60/Co gamma rays and /sup 244/Cm alpha particles. Gamma radiolysis simulated radiolysis by beta particles from fission products in the waste. Alpha radiolysis indicated the effect of alpha particles from transuranic isotopes in the waste. With gamma radiolysis, hydrogen was the only significant product; hydrogen … more
Date: January 1, 1978
Creator: Bibler, N.E.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Conventional combustion environmental assessment program

Description: Fossil fuels have composed the largest segment of the nation's energy resources. This report discusses conventional methods of converting fossil fuels to usable forms of energy, associated with environmental penalties. The conventional combustion of fossil fuels has multimedia impacts which affect the air, land and water. 7 refs., 11 figs., 6 tabs.
Date: September 1, 1978
Creator: Ponder, W. H.; Kenkeremath, D. C. (Environmental Protection Agency, Research Triangle Park, NC (USA). Industrial Environmental Research Lab. & Mitre Corp., McLean, VA (USA). METREK Div.)
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

NO/sub x/ emissions from Hanford nuclear fuels reprocessing plants

Description: Operation of the existing Hanford nuclear fuel reprocessing facilities will increase the release of nitrogen oxides (NO/sub x/) to the atmosphere over present emission rates. Stack emissions from two reprocessing facilities, one waste storage facility and two coal burning power plants will contain increased concentrations of NO/sub x/. The opacity of the reprocessing facilities' emissions is predicted to periodically exceed the State and local opacity limit of twenty percent. Past measurem… more
Date: September 15, 1978
Creator: Pajunen, A. L. & Dirkes, R. L.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of Sulfur Dioxide and Nitrogen Dioxide on Vegetation: Progress Report, 1 June 1977--28 February 1978

Description: The areas of research selected are related to fossil fuel combustion and are believed or are known to occur in the field: the mode of action of SO/sub 2/ in relation to its metabolic fate; the influence of NO/sub 2/ on the phytotoxicity of SO/sub 2/, and the combined effects of these pollutants on crop yield under field conditions; the effect of SO/sub 2/ on the plant with respect to its susceptibility to plant diseases; and the effect of SO/sub 2/ on the behavior and development of the Mexican… more
Date: February 1, 1978
Creator: Weinstein, L. H.; McCune, D. C. & MacLean, D. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Systems assessment of atmospheric fluidized-bed combustion: baseline study

Description: Early in December 1977, ORNL was asked to undertake a systems analysis and technology assessment of atmospheric fluidized-bed combustion (AFBC) with specific emphasis on: Market potential, comparative economics, technical issues, and impact of environmental control requirements. The baseline study of this activity was performed during December and culminated in the present draft report on December 30, 1977. The purpose of this report is to identify the major issues and questions regarding AFBC,… more
Date: May 1, 1978
Creator: Jones, J.E. Jr.; McNeese, L.E.; Samuels, G.; Siman-Tov, M.; Cochran, H.D.; Godfrey, T.G. et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

National Coal Utilization Assessment: a preliminary assessment of coal utilizaton in the South. [Southern USA to 2020; forecasting]

Description: Some of the major problems and issues related to coal development and use in the South are identified and assessed assuming a base-case energy scenario for the next 45 years. This scenario assumes a midrange of coal use and a relatively high rate of nuclear use over the forecast period. The potential impacts from coal development and use are significant, particularly in the 1990-2020 time period. Practically all available sites suitable for power plant development in the assessment will be util… more
Date: January 1, 1978
Creator: Berry, L. B.; Bjornstad, D. J. & Boercker, F. D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of the HEPA filter in-place test method in a corrosive off-gas environment

Description: Experiments were performed to determine if the combined effects of temperature, humidity, and oxides of nitrogen (NO/sub x/) hinder the in-place testing of high-efficiency particulate air (HEPA) filters used for cleaning the off-gas from a nuclear waste solidification facility. The laboratory system that was designed to simulate the process off-gas contained two HEPA filters in series with sample ports before each filter and after the filter bank. The system also included a reaction bomb for pa… more
Date: January 1, 1978
Creator: Murphy, L.P.; Wong, M.A. & Girton, R.C.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Health and environmental impacts of fluidized-bed combustion of coal

Description: The findings of the study regarding major areas of impact are summarized on a comparative basis. The results depend on many assumptions. They are also dependent on current engineering designs and proposed methods for handling and treating wastes. These aspects could change as the technology for the FBC is developed and are dependent on costs and on the competitive position of the technology. The relative competitive positions among the technologies are unknown, as all of the options appear capa… more
Date: January 1, 1978
Creator: Hoover, L. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Environmental monitoring report for Pantex Plant covering 1977

Description: During 1977 Pantex Plant conducted a monitoring program to determine the concentration of specific radioactive and non-radioactive species in the local environment. Although the plant activities involve the handling of significant quantities of uranium, plutonium, and tritium, only small releases of uranium (depleted in the isotope /sup 235/U) and tritium occurred which could have affected the local environment. Monitoring data indicate that concentrations of these nuclides in the environment a… more
Date: March 1, 1978
Creator: Alexander, R. E. & Horton, C. N.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Compiling a multistate emissions inventory. [Fossil-Fuel Power Plant related air pollutants]

Description: The goal of the Multistate Atmospheric Power Production Pollution Study (MAP3S) is to develop and demonstrate an improved, verified capability of numerically simulating the present conditions and potential changes in pollutant concentration, atmospheric behavior, and precipitation chemistry that result, or will result, from pollutants released to the atmosphere by large-scale power production processes. Due to the multistate nature of the MAP3S area of interest, the emissions inventory project … more
Date: January 1, 1978
Creator: Benkovitz, C M
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Hydrogen engine performance analysis. First annual report

Description: Many problems associated with the design and development of hydrogen-air breathing internal combustion engines for automotive applications have been identified by various domestic and foreign researchers. This project addresses the problems identified in the literature, seeks to evaluate potential solutions to these problems, and will obtain and document a design data-base convering the performance, operational and emissions characteristics essential for making rational decisions regarding the … more
Date: August 1, 1978
Creator: Adt, Jr., R. R.; Swain, M. R. & Pappas, J. M.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Laser photochemical reaction dynamics in formaldehyde

Description: Appearance rate constants of molecular photochemical products were measured following laser photolysis of formaldehyde in the near ultraviolet. The pressure dependence of appearance rates was studied for three formaldehyde isotopic species: H/sub 2/CO, HDCO, and D/sub 2/CO. The effect of added foreign gases on those rates in H/sub 2/CO has been determined for He, Ar, Xe, and NO. The energy dependence of photodissociation rates has been examined following laser photolysis at 354.7 and 299.1 nm a… more
Date: August 1, 1978
Creator: Zughul, M.B.A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Nitrogen oxide absorption into water and dilute nitric acid in an engineering-scale sieve-plate column with plates designed for high gas-liquid interfacial area

Description: The absorption of gaseous NO/sub x/ compounds into water and dilute HNO/sub 3/ was studied in a three-stage sieve-plate column with plates designed for high gas-liquid interfacial area. The performance of the column was measured while several operating parameters were varied. The results of the study indicate the importance of three mechanisms in the absorption of gaseous NO/sub x/ (NO/sub 2/ + 2N/sub 2/O4 + NO) compounds: (1) the absorption of NO/sub 2//sup */ (NO/sub 2/ + 2N/sub 2/O4) which r… more
Date: January 1, 1978
Creator: Counce, R. M.; Groenier, W. S.; Klein, J. A. & Perona, J. J.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Survey of processes for high temperature-high pressure gas purification. [52 references]

Description: In order to ensure the optimum operating efficiency of a combined-cycle electric power generating system, it is necessary to provide gas treatment processes capable of operating at high temperatures (> 1000/sup 0/F) and high pressures (> 10 atm (absolute)). These systems will be required to condition the inlet stream to the gas turbine to suitable levels of gas purity (removal of particulate matter, sulfur, nitrogen, and alkali metal compounds) to be compatible with both environmental and machi… more
Date: November 1, 1978
Creator: Meyer, J. P. & Edwards, M. S.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Performance of gasoline and diesel fuels produced from COED syncrude

Description: Fuel consumption and exhaust emissions characteristics were evaluated for gasoline and diesel fuel produced from coal liquid derived syncrude. The engine types used were: (1) current technology spark-ignition, homogeneous charge, (2) stratified-charge, and (3) Stirling. There were no significant changes in fuel consumption or exhaust emissions between syncrude-derived fuels and conventional fuels in stratified-charge and Stirling engines. Because of its low (approximately equal to 70) octane nu… more
Date: June 1, 1978
Creator: Bechtold, R.L. & Fleming, R.D.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of stratospheric perturbations on the solar radiation budget

Description: The changes in solar absorption and in local heating rates due to perturbations to O/sub 3/ and NO/sub 2/ concentrations caused by stratospheric injection of NO/sub x/ and CFM pollutants are assessed. The changes in species concentration profiles are derived from theoretical calculations using a transport-kinetics model. Because of significant changes in our understanding of stratospheric chemistry during the past year, the assessment of the effect of stratospheric perturbations on the solar ra… more
Date: April 1, 1978
Creator: Luther, F.M.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Performance characteristics of automotive engines in the United States. First series. Report No. 13. 1975 American Motors, 258 CID (4. 2 liters), 1V

Description: Experimental data were obtained in dynamometer tests of a 1975 AMC 258-CID production IV engine to determine fuel consumption and emissions (hydrocarbon, carbon monoxide, oxides of nitrogen) at steady-state engine-operating modes. The objective of the program is to obtain engine-performance data for estimating emissions and fuel economy for varied engine service and duty. The intent of the work is to provide basic engine characteristic data required as input for engineering calculations involvi… more
Date: April 1, 1978
Creator: Marshall, W. F. & Stamper, K. R.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Effects of a massive pulse injection of NO/sub x/ into the stratosphere

Description: Recent measurements of chemical reaction rates have greatly reduced the modeled sensitivity of stratospheric ozone toward injections of NO/sub x/ (NO/sub x/ = NO + NO/sub 2/) in amounts comparable to the natural NO/sub x/ inventory. Most of this reduced effect results from interference between NO/sub x/ and HO/sub x/ catalytic ozone destruction mechanisms. For very large NO/sub x/ injections (such as might be generated from a major nuclear exchange involving devices of greater than one megaton … more
Date: April 1, 1978
Creator: Duewer, W. H.; Wuebbles, D. J. & Chang, J. S.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Performance characteristics of automotive engines in the United States. Second series. Report No. 1. 1976 Chevrolet Vega 140 CID (2. 3 liters), 2V

Description: Experimental data were obtained in dynamometer tests of a 1976 Chevrolet Vega 2.3-liter, 140-CID engine to determine fuel consumption and emissions (hydrocarbon, carbon monoxide, oxides of nitrogen) at steady-state engine-operating modes. The objective of the program is to obtain engine-performance data for estimating emissions and fuel economy for varied engine service and duty. The intent of the work is to provide basic engine characteristic data required as input for engineering calculations… more
Date: April 1, 1978
Creator: Chamberlain, T. W.; Koehler, D. E.; Stamper, K. R. & Marshall, W. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Performance characteristics of automotive engines in the United States. Second Series, Report No. 2: 1976 Chevrolet, 305 CID (5. 0 liters), 2V. Interim report

Description: Experimental data were obtained in dynamometer tests of a 1976 Chevrolet 305-CID V-8 engine to determine fuel consumption and emissions (hydrocarbon, carbon monoxide, oxides of nitrogen) at steady-state engine-operating modes. The objective of the program is to obtain engine-performance data for estimating emissions and fuel economy for varied engine service and duty. The intent of the work is to provide basic engine characteristic data required as input for engineering calculations involving g… more
Date: April 1, 1978
Creator: Chamberlain, T. W.; Koehler, D. E.; Stamper, K. R. & Marshall, W. F.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
Back to Top of Screen