Entrevue diffusée en direct à Futur Simple, le 26 mai 2016, à l'antenne de CKRL 89,1
Topic: eau contaminants
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Jul 14, 2018
07/18
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Iaset journals
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The cement industry and its products are resources that have an impact on the landscape with dust and noise and disruption to biodiversity, sterilization of lakes and forests. There is also the reduction in populations of small invertebrates and decomposers, of agricultural yields, and extensive structural damage by corrosion from the factory. The industry may create employment and business opportunities in the area they are situated. The aim of the study is to identify the key issues of the...
Topics: Cement, Pollutants, Contaminants
Contaminants of Emerging Concern (CECs) refers to any chemical discovered in water or in the environment that had not previously been detected, or were only present at insignificant levels. CECs is the general term covering a wide class of different types of chemical compounds, including disinfection by-products, endocrine disruptors, industrial chemicals, natural toxins, Persistent Organic Pollutants (POPs), Flame Retardants (FRs), Artificial Sweeteners (ASWs), Pesticides, Pharmaceuticals and...
Topics: Contaminants, Artificial Sweeteners, Pharmaceuticals
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May 29, 2011
05/11
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Kuszmaul, Christopher Le
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Binary heaps and binary search trees merge efficiently. We introduce a new amortized analysis that allows us to prove the cost of merging either binary heaps or balanced binary trees is O(l), in the amortized sense. The standard set of other operations (create, insert, delete, extract minimum, in the case of binary heaps, and balanced binary trees, as well as a search operation for balanced binary trees) remain with a cost of O(log n). For binary heaps implemented as arrays, we show a new merge...
Topics: CLEANING, SOLVENTS, FREON, CONTAMINANTS, SUBMERGING
Thesis advisor, Lyn R. Whitaker
Topics: EXPLOSIVES, WATER TREATMENT, GROUND WATER, CONTAMINANTS
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Oct 9, 2015
10/15
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McCrea, Michael V
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Thesis advisor, Lyn R. Whitaker
Topic: EXPLOSIVES,WATER TREATMENT,GROUND WATER,CONTAMINANTS
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Jun 18, 2010
06/10
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Ballinger, J. C.; Drake, G. L.; Russ, E. J.; Sevier, W. J.; Vorbeck, D. W
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Freeze-out technique for control of trace contaminants within manned spacecraft atmospheres
Topics: AIR POLLUTION, FREEZING, MANNED SPACECRAFT, SPACECRAFT CONTAMINATION, CONTAMINANTS, FEASIBILITY,...
The analytical data obtained from both cryogenic and grab sampling of the atmosphere of the Skylab AM/MDA during an 84 hour unmanned chamber run are reported. The level of contaminants found at different points of the test chamber are tabulated. The results indicate that there was no clear trend of increasing or decreasing contaminant levels during the test run.
Topics: NASA Technical Reports Server (NTRS), AIR POLLUTION, AIR SAMPLING, CONTAMINANTS, SKYLAB PROGRAM,...
Water Supply Schemes and its Probabilistic Health Impacts on Communities of District Jamshoro, Sindh, Pakistan
Topics: Health Quotient, water supply schemes, contaminants, industrial wastes
Soil contamination by metal wastes represents a threat to the environment and to human health. Rhamnolipids have been recognized for its metal removal properties and presenting high biodegradability, however their application is sometimes hampered due to downstream cost production. In contrast, colloidal gas aphrons (CGAs) can serve as a cost-effective alternative to reduce the consumption of biosurfactants while also being significantly efficient in flushing off heavy metals in remediation...
Topics: Colloidal gas aphrons, rhamnolipid, soil washing, metal contaminants.
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Jun 3, 2011
06/11
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Warden, Robert M.; Cross, Mike; Harvison, Dou
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The Pancam Mast Assembly (PMA) for the 2003 Mars Rover is a deployable structure that provides an elevated platform for several cameras. The PMA consists of several mechanisms that enable it to raise the cameras as well as point the cameras in all directions. This paper describes the function of the various mechanisms as well as a description of the mechanisms and some test parameters. Designing these mechanisms to operate on the surface of Mars presented several challenges. Typical spacecraft...
Topics: CLEANLINESS, MAINTENANCE, CONTAMINANTS, ELIMINATION, SUBASSEMBLIES, PRECISION, LEAKAGE, AMMONIA
Mendeley Climate Change Library
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Jul 6, 2019
07/19
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Ana Luísa Maulvault; Vera Barbosa; Albert Serra-Compte; Ricardo Alves; Pedro Pousão Ferreira; Damià Barceló; Sara Rodriguez-Mozaz; Rui Rosa; Mário Diniz; António Marques
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The presence of antidepressants, such as venlafaxine (VFX), in marine ecosystems is increasing, thus, potentially posing ecological and human health risks. The inherent mechanisms of VFX uptake and elimination still require further understanding, particularly accounting for the impact of climate change-related stressors, such as warming and acidification. Hence, the present work aimed to investigate, for the first time, the effects of increased seawater temperature (ΔT°C = +5 °C) and pCO 2...
Topics: Antidepressant, Bioaccumulation, Climate change, Emerging contaminants, Fish, Venlafaxine
The essentiality of water makes it purposeful for both domestic and industrial usage. Similarly, the assertion that water is bound from contamination is untrue if not tested. The purpose of this study is to establish the concentration of bacteriological contaminants in ground water in the Wa Municipality of Ghana. The study is an experiment of six (6) sample units which include: 3 boreholes, 2 Wells and a sample from the GWCL reservoir. The findings from the study found that all the parameters...
Topics: Water Quality, Groundwater, Bacteriological Contaminants, Wa Municipality & Ghana
In urban area people spend more than 90 percent of their time in indoors environment. All of these are made worse in small or poorly-ventilated spaces (like maybe your apartment with that window that you accidentally painted shut last year). Researchers find that indoor air can emit contaminants like formaldehyde, xylene, benzene; ozone etc. as outdoor air contaminants like car exhaust finds its way into buildings. These cause serious health problem to mankind. NASA scientists have been...
Topics: Indoor air, Contaminants, Cheapest and Greenest solution, Plants, Botany
Background: Seafood safety is a priority for all stakeholders associated with supply and consumption. Outbreaks and recalls caused by microbial pathogens, toxins from harmful algal blooms and xenobiotics are attributed to contaminated seafood, leading to considerable public health and economic burdens. Yet, the complexity of seafood safety management systems in a dynamic global market affected by climate change and driven by market demands, urges the implementation of innovative research and...
Topics: Chemical contaminants, Food safety, Infrastructure needs, Research needs, Toxins
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Feb 4, 2021
02/21
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Lashford, Stephanie
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215 pages : 22 cm
Topics: Food contamination, Pesticide residues in food, Food Contaminants: Residues
In urban area people spend more than 90 percent of their time in indoors environment. All of these are made worse in small or poorly-ventilated spaces (like maybe your apartment with that window that you accidentally painted shut last year). Researchers find that indoor air can emit contaminants like formaldehyde, xylene, benzene; ozone etc. as outdoor air contaminants like car exhaust finds its way into buildings. These cause serious health problem to mankind. NASA scientists have been...
Topics: Indoor air, Contaminants, Cheapest and Greenest solution, Plants, Botany
In urban area people spend more than 90 percent of their time in indoors environment. All of these are made worse in small or poorly-ventilated spaces (like maybe your apartment with that window that you accidentally painted shut last year). Researchers find that indoor air can emit contaminants like formaldehyde, xylene, benzene; ozone etc. as outdoor air contaminants like car exhaust finds its way into buildings. These cause serious health problem to mankind. NASA scientists have been...
Topics: Indoor air, Contaminants, Cheapest and Greenest solution, Plants, Botany
Skin moisturizing lotions serve as the essential needs of modern lifestyle. Moreover its composition serves as luxurious source for the growth of varied micro-organisms as it contain special additives like plant extracts, fatty acids and vitamins. Hence the present investigation was carried out to evaluate and screen the bacterial contaminants from skin moisturizing lotions and to study its antibiotic resistance pattern. A total of 22 different types of skin moisturizing lotions representing...
Topics: Skin moisturizing lotion, Bacterial contaminants, Staphylococcus aureus, Pseudomonas aeruginosa,...
Skin moisturizing lotions serve as the essential needs of modern lifestyle. Moreover its composition serves as luxurious source for the growth of varied micro-organisms as it contain special additives like plant extracts, fatty acids and vitamins. Hence the present investigation was carried out to evaluate and screen the bacterial contaminants from skin moisturizing lotions and to study its antibiotic resistance pattern. A total of 22 different types of skin moisturizing lotions representing...
Topics: Skin moisturizing lotion, Bacterial contaminants, Staphylococcus aureus, Pseudomonas aeruginosa,...
Skin moisturizing lotions serve as the essential needs of modern lifestyle. Moreover its composition serves as luxurious source for the growth of varied micro-organisms as it contain special additives like plant extracts, fatty acids and vitamins. Hence the present investigation was carried out to evaluate and screen the bacterial contaminants from skin moisturizing lotions and to study its antibiotic resistance pattern. A total of 22 different types of skin moisturizing lotions representing...
Topics: Skin moisturizing lotion, Bacterial contaminants, Staphylococcus aureus, Pseudomonas aeruginosa,...
A quantitative means was developed to investigate the sensitivity of current spacecraft sterilization plans to variations in D-values. A quantitative expression was derived to represent the distribution of D-values among a population of naturally occurring organisms. An investigation was made of (1) the inactivation of both Bacillus subtilis var. niger spores and Cape Kennedy soil spores by gamma-radiation at room temperature in a nitrogen environment, and (2) the thermoradiation resistance of...
Topics: NASA Technical Reports Server (NTRS), SPACECRAFT STERILIZATION, SPORES, CONTAMINANTS, SOILS
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Nov 21, 2013
11/13
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International Symposium on Food Microbiology (11th : 1980 : Aalborg); Roberts, T. A. (Terence Arthur), 1934-; International Union of Microbiological Societies. Committee on Food Microbiology and Hygiene
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Includes bibliographies and index
Topics: Food, Food contamination, Psychrotrophic organisms, Food Contaminants, Psychrophilic microorganisms...
Mendeley Climate Change Library
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Jul 5, 2019
07/19
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Clare E. Robinson; Pei Xin; Isaac R. Santos; Matthew A. Charette; Ling Li; D. A. Barry
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Sustainable coastal resource management requires sound understanding of interactions between coastal unconfined aquifers and the ocean as these interactions influence the flux of chemicals to the coastal ocean and the availability of fresh groundwater resources. The importance of submarine groundwater discharge in delivering chemical fluxes to the coastal ocean and the critical role of the subterranean estuary (STE) in regulating these fluxes is well recognized. STEs are complex and dynamic...
Topics: Groundwater-ocean interactions, Interacting effects, Metals, Nutrients, Organic contaminants,...
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Jun 21, 2010
06/10
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Mamontov, V. YA., et al
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Effects of vibration and linear acceleration on fish
Topics: AIR POLLUTION, CHLORELLA, CONTAMINANTS, PHOTOSYNTHESIS, ACETONE, AMMONIA, CARBON MONOXIDE, HYDROGEN...
An apparatus denoted a swab device has been developed as a convenient means of acquiring samples of contaminants from surfaces and suspending the samples in liquids. (Thereafter, the liquids can be dispensed, in controlled volumes, into scientific instruments for analysis of the contaminants.) The swab device is designed so as not to introduce additional contamination and to facilitate, simplify, and systematize the dispensing of controlled volumes of liquid into analytical instruments. The...
Topics: NASA Technical Reports Server (NTRS), SAMPLERS, CONTAMINATION, MICROBIOLOGY, SAMPLING,...
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Jul 11, 2010
07/10
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Rice, R. F
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The two-dimensional transform used in the research TV source encoder, RM2 is discussed. It is shown that both conceptually and in terms of the number of required computations, the RM2 transform is considerably simpler than the Fast Hadamard Transform. The latter can in fact be generated by extending the RM2 transform.
Topics: CONTAMINANTS, MASS SPECTROSCOPY, SURFACE FINISHING, CLEANING, GALLIUM ARSENIDES, PLATES (STRUCTURAL...
Mendeley Climate Change Library
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Jul 6, 2019
07/19
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Ana Luísa Maulvault; Carolina Camacho; Vera Barbosa; Ricardo Alves; Patrícia Anacleto; Fabiola Fogaça; Christiaan Kwadijk; Sara C. Cunha; José O. Fernandes; Rie R. Rasmussen; Jens J. Sloth; Òscar Aznar-Alemany; Ethel Eljarrat; Damià Barceló; António Marques
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Emerging chemical contaminants [e.g. toxic metals speciation, flame retardants (FRs) and perfluorinated compounds (PFCs), among others], that have not been historically recognized as pollutants nor their toxicological hazards, are increasingly more present in the marine environment. Furthermore, the effects of environmental conditions (e.g. temperature and pH) on bioaccumulation and elimination mechanisms of these emerging contaminants in marine biota have been poorly studied until now. In this...
Topics: Acidification, Bioaccumulation, Emerging chemical contaminants, Flame retardants, Perfluorinated...
A fundamental study was conducted to investigate the activation and persistence of persulfate in the subsurface with the overlying objective of evaluating the potential for contact between the oxidant source and contaminants. Mechanistic investigation of persulfate activation by naturally occurring iron oxides, manganese oxides, clay minerals, trace minerals, base, iron chelates, and organic compounds was investigated using reaction specific probe compounds hydroxyl radical and sulfate radical...
Topics: DTIC Archive, WASHINGTON STATE UNIV PULLMAN, *CHEMICALS, CONTAMINANTS, HYDROXYL RADICALS,...
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May 23, 2011
05/11
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Weaver, M. L.; Noebe, R. D.; Kaufman, M. J
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Alloys based on the intermetallic compound NiAl are considered potential replacements for Ni and Co-based superalloys in high temperature structural applications due to their excellent oxidation resistance, low densities, high thermal conductivities, and increased melting points. Unfortunately, NiAl exhibits low tensile ductility at room temperature and low strengths at elevated temperatures which have combined to hinder its development. Recent efforts, have revealed that NiAl in the presence...
Topics: NASA PROGRAMS, HAZARDS, EXPOSURE, TOXICOLOGY, CONTAMINANTS, SPACE MISSIONS, SPACE STATIONS,...
Mendeley Climate Change Library
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Jul 6, 2019
07/19
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K. Roche; J. Kuta; I. Sedláček; R. Červenka; K. Tomanová; P. Jurajda
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Recent studies have confirmed historic atmospheric deposition of uranium in Antarctica, with a steep and significant increase in levels deposited since the 1980s in Antarctic Peninsula ice core samples. To date, however, there has been little or no attention paid to uranium in the Antarctic food web. Here, we present results for uranium content in scales of three common nototheniid species (Trematomus bernacchii, Gobionotothen gibberifrons, Notothenia coriiceps) from coastal waters off James...
Topics: Antarctic Peninsula, Bioaccumulation, Czech Antarctic station, Notothenioidei, Radioactive...
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the electrolytic refining of copper. Trainload of copper bars. Traveling crane placing set of cathode plates in a tank. Tank house. Boiler room. The furnace house -- casting and cooling refined copper bars. Source: Steve Kirch, collector, and creator of a great website about SCIENTIFIC AMERICAN in the past Restoration by: magscanner
Topics: Science and Technology Magazines, Scientific American, metals, purification, refinery, ore,...
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Jul 11, 2010
07/10
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ZAYTSEV, N. I.; PANKRATOVA, T. B.; PETELIN, M. I.; FLYAGIN, V. A
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THE BASIC FACTORS WHICH DEFINE THE SPECIFIC PROPERTIES OF MILLIMETER AND SUBMILLIMETER WAVEBAND GYROTRONS ARE A DECREASE IN THE RESONATOR OHMIC QUALITY FACTOR AND IN THE LIMITING CURRENTS OF ADIABATIC ELECTRON GUNS WITH A REDUCTION IN THE WAVELENGTH. IT FOLLOWS FROM THEORETICAL ESTIMATES AND EXPERIMENTS THAT THESE FACTORS DO NOT PREVENT THE ATTAINMENT OF HIGH EFFICIENCIES (ON THE ORDER OF 30 - 40%) IN FUNDAMENTAL CYCLOTRON RESONANCE GYROTRONS; HOWEVER, THEY SIGNIFICANTLY LOWER THE EFFICIENCY OF...
Topics: AIR FILTERS, BACTERIA, CONTAMINANTS, AIR POLLUTION, HYGIENE, INDUSTRIAL PLANTS, INFECTIOUS...
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May 26, 2011
05/11
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Haj-Hariri, Hossein; Borhan, Al
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During the past year, a great deal of effort was focused on the enhancement and refinement of the computational tools developed as part of our previous NASA grant. In particular, the interface mollification algorithm developed earlier was extended to incorporate the effects of surface-rheological properties in order to allow the study of thermocapillary flows in the presence of surface contamination. These tools will be used in the computational component of the proposed research in the...
Topics: AMINO ACIDS, DEOXYRIBONUCLEIC ACID, ASPARTIC ACID, CONTAMINANTS, INSECTS, PROTEINS, ALANINE,...
A spacecraft is the ultimate tight building. We don t want any leaks, and there is very little fresh air coming in, says Jay Perry, an aerospace engineer at Marshall Space Flight Center. As a result, there is a huge potential for a buildup of contaminants from a host of sources. Inside a spacecraft, contaminants can be introduced from the materials that make spacecraft components, electronics boxes, or activities by the crew such as food preparation or cleaning. Humans also generate...
Topics: NASA Technical Reports Server (NTRS), CONTAMINANTS, AIR QUALITY, CABIN ATMOSPHERES, ENVIRONMENTAL...
Journal of Research of the National Bureau of Standards
Topics: Beryllia hydrates (gases), contaminants, gold, pyrometry, reference vaporization, temperature...
The Missouri River Natural Resources Bibliography contains 2,232 references pertinent to the Missouri River and its floodplain on the subjects of ecology, biology, geology, geography, hydrology, sociology, policy and law. The geographic area of interest covers seven states from Montana to Missouri. The bibliography was compiled to assist researchers and management agencies in their efforts to locate information on subjects of interest. The bibliography is a product of the U.S.G.S. Environmental...
Topics: DTIC Archive, Burke, Vincent J., GEOLOGICAL SURVEY COLUMBIA MO ENVIRONMENTAL AND CONTAMINANTS...
Two catalysts for the selective oxidation of trace amounts of contaminant gases in air have been developed for use aboard the International Space Station. These catalysts might also be useful for reducing concentrations of fumes in terrestrial industrial facilities especially facilities that use halocarbons as solvents, refrigerant liquids, and foaming agents, as well as facilities that generate or utilize ammonia. The first catalyst is of the supported-precious-metal type. This catalyst is...
Topics: NASA Technical Reports Server (NTRS), CATALYSTS, CONTAMINANTS, OXIDATION, TRACE CONTAMINANTS,...
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May 23, 2011
05/11
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Koppen, Sandra V
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In support of NASA's Fly-By-Light/Power-By-Wire (FBL/PBW) program, a series of flight tests were conducted by NASA Langley Research Center in February, 1995. The NASA Boeing 757 was flown past known RF transmitters to measure both external and internal radiated fields. The aircraft was instrumented with strategically located sensors for acquiring data on shielding effectiveness and internal coupling. The data are intended to support computational and statistical modeling codes used to predict...
Topics: NITROGEN DIOXIDE, ACETYL COMPOUNDS, ORGANIC NITRATES, PHOTOLYSIS, ATMOSPHERIC CHEMISTRY, LASER...
Topics: DTIC Archive, ARMY ENGINEERING AND SUPPORT CENTER HUNTSVILLE AL, *TRICHLOROETHYLENE, CHEMICALS,...
To better equip the groundwater community with accessible, useable, and practical models for evaluating matrix diffusion effects, the Environmental Security Technology Certification Program (ESTCP) of the U.S. Department of Defense (DoD) has funded the development of this Matrix Diffusion Toolkit. Based on the Microsoft Excel(registered trademark) platform, the Toolkit is an easy-to-use, comprehensive, free software tool that can assist site personnel to effectively and efficiently estimate...
Topics: DTIC Archive, GSI ENVIRONMENTAL INC HOUSTON TX, *GROUND WATER, COMPUTERIZED SIMULATION,...
A viewgraph presentation outlines the goal, scope, and background of the cleaning solvent HCFC 225G. HCFC 225G is compared to other cleaning solvents such as Freon 113 and HFE 7100. Test results of hardware submersion in HCFC 225G and Freon 113 are shown. Project accomplishments, average cleaning efficiency, and hardware qualification are discussed. Results show HCFC 225G is an excellent cleaning and verification solvent for industrial contaminants.
Topics: NASA Technical Reports Server (NTRS), CLEANING, SOLVENTS, FREON, CONTAMINANTS, SUBMERGING, Melton,...
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Jun 13, 2011
06/11
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NON
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In the summer of 1998, the blockbuster action movie Armageddon captivated audiences with a thrilling doomsday plot about a meteor the size of Texas that was racing towards the Earth. Though the premise of the movie was purely fictional, the unfortunate reality is that near-Earth asteroids such as the one portrayed in the film do exist. On December 23, 2004, NASA announced that an asteroid it anticipated to pass near the Earth on April 13, 2029, had been assigned the highest score to date on the...
Topics: CHEMICAL COMPOSITION, TEMPERATURE EFFECTS, TRACE CONTAMINANTS, CONTROL SYSTEMS DESIGN, PURITY, MASS...
Computer program estimates quantity of activated charcoal required to control multiple contaminants. Program scans all contaminants by potential parameter value and then orders them from lowest to highest values. It calculates quantity of sorbent required to remove most strongly adsorbed material; and then, using potential plot data, capacity of other materials is calculated on basis of corrected capacity.
Topics: NASA Technical Reports Server (NTRS), ADSORBENTS, ADSORPTION, CHARCOAL, CONTAMINANTS, SORBENTS,...
Environmental Forensics Fundamentals A Practical Guide
Topics: forensic, environmental, fingerprinting, forensics, contaminants, source, chemical, contaminant,...
Heterogeneous photocatalysis involves the use of a light-activated catalyst at room temperature in order to carry out a desired reaction. In the presence of molecular oxygen, illumination of the n-type semiconductor oxide titanium dioxide (TiO2) provides for production of highly active forms of oxygen, such as hydroxyl radicals, which are able to carry out the complete oxidative destruction of simple hydrocarbons such as methane, ethane, ethylene, propylene, and carbon monoxide. This broad...
Topics: NASA Technical Reports Server (NTRS), OXIDATION, TRACE CONTAMINANTS, KINETICS, LIFE (DURABILITY),...
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Jun 21, 2010
06/10
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Kajiyama, R.; Yamaguchi, K
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Titanium impurity analysis in ferro-niobium by spectrophotometry
Topics: NIOBIUM COMPOUNDS, SPECTROPHOTOMETERS, TITANIUM, TRACE CONTAMINANTS, CHEMICAL ANALYSIS,...
1,4-Dioxane (dioxane) and n-nitrosodimethylamine (NDMA) are emerging groundwater contaminants that are probable human carcinogens. Neither compound is significantly attenuated in the environment by volatilization or sorption processes, but a role for aerobic microbial processes in their removal has been observed. The objective of this SERDP project was to identify organisms, enzymes and biochemical pathways involved in the aerobic biodegradation of dioxane and NDMA, in order to develop a better...
Topics: DTIC Archive, CALIFORNIA UNIV REGENTS BERKELEY, *GROUND WATER, BIOCHEMISTRY, BIODEGRADATION,...
The sensor is a mass spectrometer system which continuously monitors the atmospheric constituents of hydrogen, water vapor, nitrogen, oxygen, and carbon dioxide, and monitors the Freons on a demand sampling basis. The manual provides a system description, operational procedures, and maintenance and troubleshooting instructions. Circuit diagrams are included.
Topics: NASA Technical Reports Server (NTRS), AIR POLLUTION, CONTAMINANTS, MAINTENANCE, MANUALS, MASS...
Topics: DTIC Archive, SACRAMENTO AIR LOGISTICS CENTER MCCLELLAN AFB CA, *EXTRACTION, *PILOT PLANTS, GASES,...
