Biodiesel is defined as fatty acid mono-alkylesters and is produced from triacylglycerols. In the current article we provide an overview of the structure, diversity and regulation of the metabolic pathways leading to intracellular fatty acid and triacylglycerol accumulation in three types of organisms (bacteria, algae and fungi) of potential biotechnological interest and discuss possible intervention points to increase the cellular lipid content. The key steps that regulate carbon allocation and distribution in lipids include the formation of malonyl-CoA, the synthesis of fatty acids and their attachment onto the glycerol backbone, and the formation of triacylglycerols. The lipid biosynthetic genes and pathways are largely known for select model organisms. Comparative genomics allows the examination of these pathways in organisms of biotechnological interest and reveals the evolution of divergent and yet uncharacterized regulatory mechanisms. Utilization of microbial systems for triacylglycerol and fatty acid production is in its infancy; however, genomic information and technologies combined with synthetic biology concepts provide the opportunity to further exploit microbes for the competitive production of biodiesel.

Translation and summaries of materials from the Laredo Archives, held by St. Mary's University in San Antonio, Texas; the documents contain information related to the history of Mexico, starting with the end of Spanish Mexico through 1845.

This document, part of the Synthesis and Assessment Products described in the U.S. Climate Change Science Program (CCSP) Strategic Plan. Climate affects the design, construction, safety, operations, and maintenance of transportation infrastructure and systems. The prospect of a changing climate raises critical questions regarding how alterations in temperature, precipitation, storm events, and other aspects of the climate could affect the nation's roads, airports, rail, transit systems, pipelines, ports, and waterways. Phase I of this regional assessment of climate change and its potential impacts on transportation systems addresses these questions for the region of the U.S. central Gulf Coast between Galveston, Texas and Mobile, Alabama. This region contains multimodal transportation infrastructure that is critical to regional and national transportation services. The significance of various climate factors for transportation systems was assessed.

McStain Enterprises' new cottage-style homes built under the U.S. Department of Energy's Building America program are designed to greatly reduce energy costs and improve indoor air quality for their customers in Longmont, Colorado. In addition, energy-efficient features in the homes provide owners with greater durability and value, allow some buyers to qualify for special energy-efficient mortgages, and can result in higher resale values. Features include improved building envelope and air distribution systems, high-efficiency heating and cooling systems, improved indoor air quality, and Green Builder concepts from Colorado's Green Builder Program.

"This manual is a tool to facilitate the implementation of the Crash Records Information System (CRIS) in Texas and to guide peace officers in the completion of the Texas Peace Officer's Crash Report and the Commercial Motor Vehicle Supplement to the Texas Peace Officer's Crash Report" (p. 1)

As 3D volumetric images of the human body become an increasingly crucial source of information for the diagnosis and treatment of a broad variety of medical conditions, advanced techniques that allow clinicians to efficiently and clearly visualize volumetric images become increasingly important. Interaction has proven to be a key concept in analysis of medical images because static images of 3D data are prone to artifacts and misunderstanding of depth. Furthermore, fading out clinically irrelevant aspects of the image while preserving contextual anatomical landmarks helps medical doctors to focus on important parts of the images without becoming disoriented. Our goal was to develop a tool that unifies interactive manipulation and context preserving visualization of medical images with a special focus on diffusion tensor imaging (DTI) data. At each image voxel, DTI provides a 3 x 3 tensor whose entries represent the 3D statistical properties of water diffusion locally. Water motion that is preferential to specific spatial directions suggests structural organization of the underlying biological tissue; in particular, in the human brain, the naturally occuring diffusion of water in the axon portion of neurons is predominantly anisotropic along the longitudinal direction of the elongated, fiber-like axons [MMM+02]. This property has made DTI …

Based on documents from the Laredo Archives, Life in Laredo shows the evolution and development of daily life in a town under the flags of Spain, Mexico, and the United States. Isolated on the northern frontier of New Spain and often forgotten by authorities far away, the people of Laredo became as grand as the river that flowed by their town and left an enduring legacy in a world of challenges and changes. Because of its documentary nature, Life in Laredo offers in sights into the nitty-gritty of the comings and goings of its early citizens not to be found elsewhere. Robert D. Wood, S.M., presents the first one hundred years of history and culture in Laredo up to the mid-nineteenth century, illuminating--with primary source evidence--the citizens' beliefs, cultural values, efforts to make a living, political seesawing, petty quarreling, and constant struggles against local Indians. He also details rebellious military and invading foreigners among the early settlers and later townspeople. Scholars and students of Texas and Mexican American history, as well as the Laredoans celebrating the 250th anniversary (in 2005) of Laredo's founding, will welcome this volume. "Although there have been a number of books on the history of Laredo, …

Contaminants in soil can impact human health and the environment through a complex web of interactions. Soils exist where the atmosphere, hydrosphere, geosphere, and biosphere converge. Soil is the thin outer zone of the earth's crust that supports rooted plants and is the product of climate and living organisms acting on rock. A true soil is a mixture of air, water, mineral, and organic components. The relative proportions of these components determine the value of the soil for agricultural and for other human uses. These proportions also determine, to a large extent, how a substance added to soil is transported and/or transformed within the soil (Spositio, 2004). In mass-balance models, soil compartments play a major role, functioning both as reservoirs and as the principal media for transport among air, vegetation, surface water, deeper soil, and ground water (Mackay, 2001). Quantifying the mass transport of chemicals within soil and between soil and atmosphere is important for understanding the role soil plays in controlling fate, transport, and exposure to multimedia pollutants. Soils are characteristically heterogeneous. A trench dug into soil typically reveals several horizontal layers having different colors and textures. As illustrated in Figure 1, these multiple layers are often divided into …

This brochure presents the capabilities that the Measurements and Characterization Division has in Analytical Microscopy, in which a variety of sophisticated techniques are used to study a material's topographical, crystallographic, structural, chemical, and luminescence properties.

This brochure presents the capabilities that the Measurements and Characterization Division has for transferring secure characterization data to clients over the Web, and for collaborating in R and D via the Web over distances (i.e., working as a virtual lab).

This brochure presents the capabilities that the Measurements and Characterization Division has in device performance, in which a variety of spectral responsivity and current-versus-voltage techniques are used to measure the spectral dependence of PV cells and module conversion efficiencies, and to measure the output performance of cells and modules under simulated and natural light.

This brochure presents the capabilities that the Measurements and Characterization Division has in Electro-Optical Characterization, in which a variety of spectroscopy, ellipsometry, and capacitance techniques are used to probe the fundamental electrical and optical properties of solid-state materials.

This brochure presents the capabilities that the Measurements and Characterization Division has in Surface Analysis, in which a variety of spectrometry and spectroscopy techniques are used to determine the chemical, elemental, and molecular composition of material surfaces and interfaces.

She flew the swift P-51 and the capricious P-38, but the heavy, four-engine B-17 bomber and C-54 transport were her forte. This is the story of Nancy Harkness Love who, early in World War II, recruited and led the first group of twenty-eight women to fly military aircraft for the U.S. Army. Love was hooked on flight at an early age. At sixteen, after just four hours of instruction, she flew solo “a rather broken down Fleet biplane that my barnstorming instructor imported from parts unknown.” The year was 1930: record-setting aviator Jacqueline Cochran (and Love’s future rival) had not yet learned to fly, and the most famous woman pilot of all time, Amelia Earhart, had yet to make her acclaimed solo Atlantic flight. When the United States entered World War II, the Army needed pilots to transport or “ferry” its combat-bound aircraft across the United States for overseas deployment and its trainer airplanes to flight training bases. Most male pilots were assigned to combat preparation, leaving few available for ferrying jobs. Into this vacuum stepped Nancy Love and her civilian Women’s Auxiliary Ferrying Squadron (WAFS). Love had advocated using women as ferry pilots as early as 1940. Jackie Cochran …

The National Renewable Energy Laboratory's (NREL) eighth annual Information Resources Catalog can help keep you up-to-date on the research, development, opportunities, and available technologies in energy efficiency and renewable energy. The catalog includes five main sections with entries grouped according to subject area.

Neutrons are an invaluable probe in a wide range of scientific, medical and commercial endeavors. Many of these applications require the recording of an image of the neutron signal, either in one-dimension or in two-dimensions. We summarize the reactions of neutrons with the most important elements that are used for their detection. A description is then given of the major techniques used in neutron imaging, with emphasis on the detection media and position readout principle. Important characteristics such as position resolution, linearity, counting rate capability and sensitivity to gamma-background are discussed. Finally, the application of a subset of these instruments in radiology and tomography is described.

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, 1999 issue, titled ''Knowledge is PV Power'' focuses on the contribution of the university-based subcontractors to the PV Program. The editorialist is Robert Birkmire, Director of the Institute of Energy Conversion, which is affiliated with the University of Delaware.

Just imagine living in Florida and your fantasies might turn to swaying palms, fresh orange juice and lots of air-conditioning. For most people, a summer spent in Florida's heat and humidity would be unbearable without it. So air-conditioning is a necessity. But it's also a big energy drain, accounting for about 35% of all electricity used in a typical Florida house. As the largest single source of energy consumption in Florida, a home's air-conditioning load represents the biggest energy challenge. The Florida Solar Energy Center (FSEC) designed a project to answer this challenge. Two homes were built with the same floor plan on near-by lots. The difference was that one (the ''control home'') conformed to local residential building practices, and the other (the ''Zero Energy home'') was designed with energy efficiency in mind and solar technology systems on the roof. The homes were then monitored carefully for energy use. The project's designers were looking to answer two important questions: Could a home in a climate such as central Florida's be engineered and built so efficiently that a relatively small PV system would serve the majority of its cooling needs--and even some of its daytime electrical needs? And, would that home …

EUV lithography (EUVL) employs illumination wavelengths around 13.5 nm, and in many aspects it is considered an extension of optical lithography, which is used for the high-volume manufacturing (HVM) of today's microprocessors. The EUV wavelength of illumination dictates the use of reflective optical elements (mirrors) as opposed to the refractive lenses used in conventional lithographic systems. Thus, EUVL tools are based on all-reflective concepts: they use multilayer (ML) coated optics for their illumination and projection systems, and they have a ML-coated reflective mask.

Interview with Burlyce Logan, one of the first African American students at North Texas, and UNT alumna whose college education began in 1956 and concluded in 2011. She recalls her childhood and education in Dallas and New York City; love of piano and musical education; decision to become one of the first African American students at North Texas; experiences as a college student, including racist incidents on campus, and as a boarder in Southeast Denton; decision to drop out in 1958; marriage to Raymond Logan, move to California, and return to Denton; decision to return to UNT as a student in 2005 and experiences on campus in the 21st century; 2011 graduation.

Interview with Charles "Chuck" Beatty, African-American alumnus of North Texas State University. The interview includes Beatty's personal experiences of childhood and education, accepting an athletic scholarship to North Texas, playing football at North Texas and with the Pittsburgh Steelers and other professional teams, being in the National Guard during the Vietnam era, and returning to North Texas to earn a degree following his professional football career. Additionally, Beatty speaks of social life among African-American students and relations with white students and faculty, his experiences as an elected official in Waxahachie and as a member of the UNT Board of Regents, and his perceptions of change at North Texas over time.

Interview with Charlie Rodriguez, businessman and musician, concerning his recollections concerning the development of the Northside (Fort Worth, Texas) Hispanic community, his music career, and the evolution of his family's Mexican foods business.

Interview with Dennis Dunkins, African-American alumnus of North Texas State University. The interview includes Dunkins' personal experiences of childhood and education, enrolling in North Texas, majoring in Industrial Technology and his graduation in 1963, having a career with General Motors, as a business owner, and with Fort Worth ISD. Additionally, Dunkins speaks about off-campus life in "Shack Town" and support from black citizens of Denton, social life among African-American students and relations with white students and faculty, efforts to desegregate public facilities in Denton, and his summer jobs with Texas & Pacific Railroad Company. The interview includes a photograph of the University of North Texas Trailblazers in 2005.

Interview with accountant and Army veteran Frederick R. Freeman. The interview includes Freeman's personal experiences about the European Theater during the World War II, basic training, advanced infantry training, initial combat on the front lines in France, survival techniques under combat conditions, the Ardennes Offensive, and the Battle of the Bulge. Freeman also talks about the effects of combat losses and acclimation of individual replacements, his bout with combat exhaustion and reassignment to a replacement depot as a clerk, his participation in the Army of Occupation, and postwar adjustments to civilian life.