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Now showing items 2561-2570 of 2600
Effects of Water Content and Alumino-Silicate Sources on the Structure and Properties of Geopolymers
(2012-10-19)
Geopolymers (GPs) are a special class of inorganic polymers with unique properties. Their 3-D amorphous structure and properties are often attributed to SiO2/Al2O3 molar ratios. However; contradictory results reported in ...
Regulation of Branching by Phytochrome and Phytohormones
(2012-07-16)
Light is the fundamental source of energy and information throughout the plant life cycle. Light signals regulate plant architecture and branching, key processes that determine biomass production and grain yield. Low red ...
Highly Parallel Magnetic Resonance Imaging with a Fourth Gradient Channel for Compensation of RF Phase Patterns
(2012-08-20)
A fourth gradient channel was implemented to provide slice dependent RF coil phase compensation for arrays in dual-sided or "sandwich" configurations. The use of highly parallel arrays for single echo acquisition magnetic ...
The Impact of a Forest Pathogen on the Endangered Golden-cheeked Warbler
(2012-07-16)
Oak wilt is a fatal disease of oaks caused by the fungus Ceratocystis fagacearum. Loss or degradation of habitat due to the disease may negatively affect the federally endangered golden-cheeked warbler (Setophaga chrysoparia). ...
Essays on the Relationship of Competition and Firms' Price Responses
(2012-02-14)
This dissertation investigates the relationship of competition and firms' price responses, by analyzing: i) whether new entry reduces price discrimination, ii) when incumbents reduce price discrimination preemptively in ...
Improved Algorithms for Discovery of Transcription Factor Binding Sites in DNA Sequences
(2012-02-14)
Understanding the mechanisms that regulate gene expression is a major challenge in biology. One of the most important tasks in this challenge is to identify the transcription
factors binding sites (TFBS) in DNA sequences. ...
Effects of Biochar Recycling on Switchgrass Growth and Soil and Water Quality in Bioenergy Production Systems
(2012-07-16)
Intensive biomass production in emerging bioenergy systems could increase nonpoint-source sediment and nutrient losses and impair surface and groundwater quality. Recycling biochar, a charcoal byproduct from pyrolysis of ...
Regulation of the Nitrogen Fixation Genes in the Heterocystous Cyanobacterium Anabaena sp. Strain PCC 7120
(2012-02-14)
Many multicellular cyanobacteria produce specialized nitrogenfixing heterocysts. During diazotrophic growth of Anabaena (Nostoc) sp. strain PCC 7120, a regulated developmental pattern of single heterocysts separated by ...
Designing An Interplanetary Autonomous Spacecraft Navigation System Using Visible Planets
(2012-07-16)
A perfect duality exists between the problem of space-based orbit determination from line-of-sight measurements and the problem of designing an interplanetary autonomous navigation system. Mathematically, these two problems ...
Electrolytic Methods as a Cost and Energy Effective Alternative of Harvesting Algae for Biofuel
(2012-08-30)
Process variables of electrolytic technology to reduce the energy consumption of harvesting Nonnocloropsis salina were investigated including electro-coagulation, electro-floatation, and electro-flocculation. Electro-coagulation ...