UNT Libraries Government Documents Department - 209 Matching Results

Search Results


Description: Fungi and yeast have been characterized as important components in the bioremediation of organic contaminants in soil and water including polyaromatic hydrocarbons (PAHs); however, research into their ability to metabolize these compounds in extreme environments has been limited. In this work forty-three fungi and yeasts were isolated from a PAH-contaminated sludge waste lagoon in Poland. The lagoon was part of a monitored natural attenuation (MNA) study where natural reduction of PAHs and associated toxicity over time in non-disturbed areas of the sludge lagoon indicated MNA activity. The microorganisms were initially isolated on minimal medium containing naphthalene as the sole carbon and energy source. Fungal isolates were then maintained on MEA and identified based on microscopic examination and BIOLOG{reg_sign}. The analysis identified several of the fungal isolates as belonging to the genera Penicillium, Paecilomyces, Aspergillus, and Eupenicillium. Yeasts included Candida parapsilosis and C. fluvialitis. Further microbial characterization revealed that several isolates were capable of rowing on acidified media of pH 4, 3, and 2.5. Over twenty percent of the fungi demonstrated growth as low as pH 2.5. Of the 43 isolates examined, 24 isolates exhibited growth at 5 C. Nine of the fungal isolates exhibiting growth at 5 C were then examined for metabolic activity using a respirometer testing metabolic activity at pH 3. Microcosm studies confirmed the growth of the fungi on PAH contaminated sediment as the sole carbon and energy source with elevated metabolic rates indicating evidence of MNA. Our findings suggest that many of the Poland fungal isolates may be of value in the bioremediation processes in acidic waste sites in northern climates typical of Northern Europe.
Date: January 26, 2010
Creator: Brigmon, R.; Abe, M.; Johnson, B.; Simpson, W. & Mckinsey, P.

Save with Solar Newsletter, Vol. 2, Issue 1, Spring 1999

Description: ''Save with Solar'' is a quarterly bulletin produced under the Department of Energy's Federal Energy Management Program for all those who are planning or working on installations of solar and other renewable energy technologies in the Federal government's facilities. Contents include technical information about today's solar technologies and information about the programs, policies, procurement practices, and incentives that support the deployment of renewable energy in the Federal sector. Among the topics covered in this issue is a two-page article about how solar energy is being used by the National Science Foundation in NSF outposts in Antarctica. The newsletter also describes projects that meet the goals of the President's Million Solar Roofs Initiative.
Date: May 26, 1999
Creator: Eiffert, P.

Next Generation Natural Gas Vehicle (NGNGV) Program Brochure

Description: The Department of Energy's Office of Transportation Technologies is initiating the Next Generation Natural Gas Vehicle (NGNGV) Program to develop commercially viable medium- and heavy-duty natural gas vehicles. These new vehicles will incorporate advanced alternative fuel vehicle technologies that were developed by DOE and others.
Date: October 26, 2000
Creator: Elling, J.

Energy Matters - January/February 2000

Description: Energy Matters is an Office of Industrial Technologies bimonthly publication on energy efficiency opportunities. This issue's focus is on reliability-centered maintenance along with articles on optimizing industrial process heating and discussion on an international motor systems management tool.
Date: January 26, 2000
Creator: Ericksen, E.

Motor Challenge Energy Matters, March 1999

Description: The March 1999 issue of Energy Matters (formerly Turning Point) discusses options industrial customers have for financing energy projects through utilities. This issue also features information about the services provided by energy service companies (ESCOs) and explains how the Northwest Energy Efficiency Alliance sponsors projects to protect the environment and help customers cut utility costs. A special 4-page supplement focuses on the Compressed Air Challenge and opportunities to improve the efficiency of industrial compressed air systems.
Date: March 26, 1999
Creator: Ericksen, E.

Training Sessions and Materials Present Ways to Improve System Efficiency: OIT Technical Assistance Fact Sheet: Training

Description: Interested in learning about innovative ways to improve the efficiency of your plant's steam, electric motor, and compressed air systems? This US Department of Energy Office of Industrial Technologies fact sheet offers information regarding training sessions, teleconferences, and various training materials to teach you and your company ways to reduce energy use, save money, and reduce waste and pollution through system optimization.
Date: January 26, 1999
Creator: Ericksen, E.

FEMP: Seven steps to saving: How to implement energy-saving projects

Description: The Energy Policy Act of 1992 and supporting Executive Orders have directed Federal agencies to implement cost-effective energy and water efficient measures to help conserve natural resources and protect the environment. Federal energy and facility managers can make a big difference. DOE's Federal Energy Management Program (FEMP) has outlined seven steps on how to implement an energy-saving project.
Date: May 26, 1999
Creator: Pitchford, P.

NREL PV Working With Industry, Fourth Quarter 2000

Description: NREL PV Working With Industry is a quarterly newsletter devoted to the research, development, and deployment performed by NREL staff in concert with their industry and university partners. The fourth quarter contains an article that is a followup to the IEEE PVSC conference held in Alaska in September 2000, an article about two new R and D initiatives, and an article on cooperative research efforts between the NCPV and the Solar Buildings and Concentrating Solar Power programs. The editorialist is Jim Rannels, Director of the Office of Power Technologies.
Date: December 26, 2000
Creator: Poole, L.

Solar Electricity - The Power of Choice, First Quarter 2001

Description: Solar Electricity--The Power of Choice (formerly NREL PV Working With Industry) is a quarterly newsletter devoted to the research and development activities performed by NREL staff in concert with their industry and university partners. This issue is devoted to NREL's renewables workshop for farmers and ranchers, presented at the National Western Stock Show in Denver; the PV Industry Roadmap; the Siemens Solar Industries celebration of 200 MW of cumulative PV module production; and a profile of ''PV Beyond the Horizon'' initiative. The editorialist for this issue is Tim Anderson of the University of Florida.
Date: April 26, 2001
Creator: Poole, L.; Schnelten, K. & Moon, S.


Description: Radiation can damage cellular components, including DNA. Organisms have developed a panoply of means of dealing with DNA damage. Some repair paths have rather narrow substrate specificity (e.g. photolyases), which act on specific pyrimidine photoproducts in a specific type (e.g., DNA) and conformation (double-stranded B conformation) of nucleic acid. Others, for example, nucleotide excision repair, deal with larger classes of damages, in this case bulky adducts in DNA. A detailed discussion of DNA repair mechanisms is beyond the scope of this article, but one can be found in the excellent book of Friedberg et al. [1] for further detail. However, some DNA damages and paths for repair of those damages important for photobiology will be outlined below as a basis for the specific examples of genetic and molecular analysis that will be presented below.
Date: July 26, 2001
Creator: Sutherland, B. M.


Description: Organisms living on the earth are exposed to solar radiation, including its ultraviolet (UV) components (for general reviews, the reader is referred to Smith [1] and Young et al. [2]). UV wavelength regions present in sunlight are frequently designated as UVB (290-320 nm) and UVA (320-400 nm). In today's solar spectrum, UVA is the principal UV component, with UVB present at much lower levels. Ozone depletion will increase the levels of UVB reaching the biosphere, but the levels of UVA will not be changed significantly [3]. Because of the high efficiency of UVB in producing damage in biological organisms in the laboratory experiments, it has sometimes been assumed that UVA has little or no adverse biological effects. However, accumulating data [4, 5], including action spectra (efficiency of biological damage as a function of wavelength of radiation; see Section 5) for DNA damage in alfalfa seedlings [6], in human skin [7], and for a variety of plant damages (Caldwell, this volume) indicate that UVA can induce damage in DNA in higher organisms. Thus, understanding the differential effects of UVA and UVB wavebands is essential for estimating the biological consequences of stratospheric ozone depletion.
Date: July 26, 2001
Creator: Sutherland, B. M.

Regional Resource Center for Innovation

Description: The Regional Resource Centers for Innovation (RRCIs) promote networking among the various regional, state, and local specialists who provide services to inventors and small business innovators. This networking facilitates the rapid deployment of I&I technologies that provide solutions for the energy challenges facing the U.S.
Date: April 26, 2000
Creator: Theis, K.

Highlighting High Performance: The Solar Energy Research Facility, Golden, Colorado

Description: The National Renewable Energy Laboratory's Solar Energy Research Facility in Golden, Colorado, uses a stair-step configuration to allow daylight and heat into the office areas, while the laboratories in the back of the building are in a more controlled environment where tight levels of ventilation, humidity, temperature, and light are critical. A unique mechanical system makes the most of the natural environment and the building's design to efficiently heat and cool the building at an annual utility bill savings of almost $200,000 per year.
Date: June 26, 2001
Creator: Torcellini, P. & Epstein, K.

Grinding machines

Description: This report provides the definition of grinding and discusses different processes, types, and operations of grinding.
Date: November 26, 1940
Creator: United States. Army. Air Corps.