26 Matching Results

Search Results

Results: 1 - 24 next
open access

Chapter 8: Selective Stoichiometric and Catalytic Reactivity in the Confines of a Chiral Supramolecular Assembly

Description: Nature uses enzymes to activate otherwise unreactive compounds in remarkable ways. For example, DNases are capable of hydrolyzing phosphate diester bonds in DNA within seconds,[1-3]--a reaction with an estimated half-life of 200 million years without an enzyme.[4] The fundamental features of enzyme catalysis have been much discussed over the last sixty years in an effort to explain the dramatic rate increases and high selectivities of enzymes. As early as 1946, Linus Pauling suggested that enzy… more
Date: September 27, 2007
Creator: University of California, Berkeley; Laboratory, Lawrence Berkeley National; Raymond, Kenneth; Pluth, Michael D.; Bergman, Robert G. & Raymond, Kenneth N.
Partner: UNT Libraries Government Documents Department
open access

Biomolecular Modification of Inorganic Crystal Growth

Description: The fascinating shapes and hierarchical designs of biomineralized structures are an inspiration to materials scientists because of the potential they suggest for biomolecular control over materials synthesis. Conversely, the failure to prevent or limit tissue mineralization in the vascular, skeletal, and urinary systems is a common source of disease. Understanding the mechanisms by which organisms direct or limit crystallization has long been a central challenge to the biomineralization communi… more
Date: April 27, 2007
Creator: De Yoreo, J. J.
Partner: UNT Libraries Government Documents Department
open access

On the Computation of Integral Curves in Adaptive Mesh Refinement Vector Fields

Description: Integral curves, such as streamlines, streaklines, pathlines, and timelines, are an essential tool in the analysis of vector field structures, offering straightforward and intuitive interpretation of visualization results. While such curves have a long-standing tradition in vector field visualization, their application to Adaptive Mesh Refinement (AMR) simulation results poses unique problems. AMR is a highly effective discretization method for a variety of physical simulation problems and has … more
Date: June 27, 2011
Creator: Deines, Eduard; Weber, Gunther H.; Garth, Christoph; Van Straalen, Brian; Borovikov, Sergey; Martin, Daniel F. et al.
Partner: UNT Libraries Government Documents Department
open access

Development and Application of Compatible Discretizations of Maxwell's Equations

Description: We present the development and application of compatible finite element discretizations of electromagnetics problems derived from the time dependent, full wave Maxwell equations. We review the H(curl)-conforming finite element method, using the concepts and notations of differential forms as a theoretical framework. We chose this approach because it can handle complex geometries, it is free of spurious modes, it is numerically stable without the need for filtering or artificial diffusion, it co… more
Date: May 27, 2005
Creator: White, D.; Koning, J. & Rieben, R.
Partner: UNT Libraries Government Documents Department
open access

Steel: Reducing BOF Hood Scrubber Energy Costs at a Steel Mill (Technical Case Study)

Description: This OIT Technical Case Study reveals how Bethlehem Steel Corporation, by installing a variable-frequency drive and making associated equipment modifications, was able to save energy, reduce operational costs, and decrease system maintenance.
Date: January 27, 1999
Creator: Ericksen, E.
Partner: UNT Libraries Government Documents Department
open access

Petroleum--Project Fact Sheet: A Motor Challenge Success Story

Description: By upgrading its motor systems at its Richmond, California, refinery, Chevron was able to realize cost savings of more than $700,000 per year, in addition to reduced energy consumption of approximately 1 million kilowatts per month and improved equipment reliability and process control. Order this fact sheet to find out how they did it.
Date: January 27, 1999
Creator: Ericksen, E.
Partner: UNT Libraries Government Documents Department
open access

Natural gas buses: Separating myth from fact (Clean Cities alternative fuel information series fact sheet)

Description: Increasing numbers of transit agencies across North America are making the choice to convert their bus fleets to compressed natural gas (CNG), and even more are seriously considering it. Natural gas buses now account for at least 20{percent} of all new bus orders. However, it becomes difficult for fleet operators to fairly evaluate the potential benefits of an alternative fuel program if they are confronted with misinformation or poor comparisons based on false assumptions. This fact sheet addr… more
Date: April 27, 2000
Creator: Parish, R.
Partner: UNT Libraries Government Documents Department
open access

Establishing a hydrostratigraphic framework using palynology -- An example from the Savannah River Site, South Carolina, U.S.A.

Description: An essential part of the environmental assessments is the characterization of the subsurface hydrogeology. Hydrogeological characterization involves establishing the hydrologic and geologic conditions and incorporating this information into groundwater flow and contaminant transport models.
Date: January 27, 2000
Creator: Van Pelt, R.
Partner: UNT Libraries Government Documents Department
open access

Window industry technology roadmap

Description: Technology roadmap describing technology vision, barriers, and RD and D goals and strategies compiled by window industry stakeholders and government agencies.
Date: April 27, 2000
Creator: Brandegee
Partner: UNT Libraries Government Documents Department
open access

Electrifying Pinnacles: FEMP technical assistance detailed case study fact sheet[Pinnacles National Monument]

Description: A hybrid photovoltaic system provides Pinnacles National Monument with electrical services in an environmentally sensitive area. This quite, unobtrusive system provides the Chapparral area with clean, reliable electricity. Installing renewable energy projects at Federal facilities provides Federal agencies an opportunity to fulfill their mandate for responsible stewardship of national resources with cost-effective environmentally benign technologies.
Date: October 27, 1998
Creator: McIntyre, M.
Partner: UNT Libraries Government Documents Department
open access

Ford F-250 Fact Sheet: Bi-fuel propane pickup

Description: The U.S. Department of Energy (DOE) is promoting the use of alternative fuels and alternative fuel vehicles (AFVs). To support this activity, DOE has directed the National Renewable Energy Laboratory (NREL) to conduct projects to evaluate the performance and acceptability of light-duty AFVs. A 1999 F-250 bi-fuel propane pickup was run through a series of tests while operating on LPB and gasoline. The tests are explained briefly in this fact sheet.
Date: December 27, 1999
Creator: Eudy, L.
Partner: UNT Libraries Government Documents Department
open access

Building technology roadmaps

Description: DOE's Office of Building Technology, State and Community Programs (BTS) is facilitating an industry-led initiative to develop a series of technology roadmaps that identify key goals and strategies for different areas of the building and equipment industry. This roadmapping initiative is a fundamental component of the BTS strategic plan and will help to align government resources with the high-priority needs identified by industry.
Date: January 27, 1999
Partner: UNT Libraries Government Documents Department
open access

Making the licensing decision

Description: This report is a primer for industry (inventors and corporations) on how to license technology.
Date: October 27, 1998
Creator: National Renewable Energy Laboratory (U.S.)
Partner: UNT Libraries Government Documents Department
open access

Dallas-Fort Worth clean cities: Award winning coalition

Description: Designated a Clean City in 1995, Dallas-Fort Worth now includes 140 coalition members and interested parties who operate more than 5,800 alternative fuel vehicles. Dallas-Fort Worth Clean Cities is administered by the North Central Texas Council of Governments, the metropolitan planning organization for the region, which represents hundreds of municipal and local government agencies.
Date: April 27, 2000
Creator: Woodward, S.
Partner: UNT Libraries Government Documents Department
open access

Mid-Atlantic region consumer's guide to buying a solar electric system

Description: Consumers in Pennsylvania, Virginia, Delaware, Maryland, the District of Columbia, West Virginia, and New Jersey are showing increased interest in solar electric systems for their homes and businesses. This booklet provides basic information about buying a PV system. Photovoltaic (PV) systems are reliable, pollution free, and use a renewable source of energy, the sun. A PV system can be a substantial investment and careful planning will help ensure that you make the right decisions.
Date: September 27, 1999
Creator: National Renewable Energy Laboratory (U.S.)
Partner: UNT Libraries Government Documents Department
open access

Columbia-Willamette, Oregon/Washington award winning coalition (Clean Cities award winning coalition alternative fuel information series fact sheet)

Description: In November 1994, the Portland Clean Cities Coalition became the 28th Clean City. And Number 28 took off and quickly picked up speed. By the end of 1999, the group had grown so much that it sought re-designation under a new name, the Columbia-Willamette Clean Cities Coalition, to better reflect the much larger geographical area it had come to represent. The coalition now represents two states, encompassing much of southwest Washington and most of Oregon. Several municipal agencies, along with m… more
Date: April 27, 2000
Creator: Howard, R.
Partner: UNT Libraries Government Documents Department
open access

ELECTRONIC AND CHEMICAL PROPERTIES OF PD IN BIMETALLIC SYSTEMS: HOW MUCH DO WE KNOW ABOUT HETERONUCLEAR METAL-METAL BONDING?

Description: The experimental and theoretical studies described above illustrate the complex nature of the heteronuclear metal-metal bond. In many cases, bimetallic bonding induces a significant redistribution of charge around the bonded metals. This redistribution of charge is usually linked to the strength of the bimetallic bond, affects the position of the core and valence levels of the metals, and can determine the chemical reactivity of the system under study. New concepts are emerging [22,23,34,36] an… more
Date: September 27, 2001
Creator: Rodriguez, J. A.
Partner: UNT Libraries Government Documents Department
open access

Alternative fuel news: Official publication of the clean cities network and the alternative fuels data center, Vol. 4, No. 1

Description: This issue of Alternative Fuel News contains information on the upcoming Clean Cities Conference to be held May 7--10, 2000 in San Diego, California. Highlighted in this issue is the success of the Clean Cities Program in creating clean corridors that permit fleets that serve multiple cities to purchase AFVs with confidence, knowing that fueling convenience and supply will not be a problem. Also look for articles on electric vehicles, transit buses; state and fuel provider enforcement; the Salt… more
Date: March 27, 2000
Creator: National Renewable Energy Laboratory (U.S.)
Partner: UNT Libraries Government Documents Department
Back to Top of Screen