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Now showing items 21-40 of 623
QTL analysis for genes for brace root angle in zea mays l. [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
Brace roots play a major role in determining amount of lodging, and are responsible for a significant portion of water and nutrient uptake. Using the randomly intermated B73 x Mo17 (IBM) RIL mapping population, we are ...
Identification of chloroplast DNA insertions in B73 nuclear chromosomes [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
It is known that DNA from mitochondria and chloroplasts migrates to the nucleus and incorporates into the nuclear genome. It is unknown how often this transfer and integration process occurs or if specific sites in the ...
Circular and linear mitochondrial genomes in cytoplasmic male sterile maize [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
Cytoplasmic male sterility (CMS) is a maternally inherited condition in which a plant has an inability to produce viable pollen. It is usually due to the production of a toxic chimeric protein within the mitochondria during ...
Investigations of iron-regulated genes in Arabidopsis thaliana [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
Iron is essential for virtually all life, but little is known about the way plants sense, take up, and maintain iron. In an effort to learn more about how plants use this vital nutrient, two projects using the model plant ...
Nitrate reducing commensal bacterium stimulates germination through nitric oxide production-a hypothesis [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
The pink-pigmented (PPFM) commensal bacterium bacterium, Methylobacterium extorquens AM1, stimulates germination of soybean and other plants. I am testing the hypothesis that germination is stimulated by bacterial-produced ...
Optimization of activated carbon made from corn cobs [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
As part of an initiative to research and develop higher-values uses for agricultural by-products, this project is on producing activated carbon from corn cobs. This carbon is superior to any that is commercially available because of the increased...
Comparative selectivity of various Salmonella typhimurium strains in targeting prostate cancer cells [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
at Columbia's Cancer Research Center discovered an archival strain of (CRC1674) that destroys PC-3M prostate cancer cells without extensive lysis of the cancer cells, a factor thought to contribute to the toxicity of VNP20009. This project studies...
Shear wave velocity profiles determined from the inversion of surface wave velocity data [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
in the International Building Code to determine site classification. In many cases, surface wave measurements are performed at sites where complicating conditions exist, such as velocity inversions or embedded stiff layers. The purpose of this research...
3D finite element analysis of the acetabulum and interference fit for total hip arthroplasty [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
Demand for hip replacement surgery is rising with the increasing age of the human population. The effects of the cementless interference fit acetabular cups are not fully understood, and as such is the focus of the present research. The inserted cup...
Characterization of runtime and jitter on a megavolt laser triggered spark gap switch [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
the applied field, rate of rise and gas pressure of the switch along with the laser power, focused intensity, and Rayleigh range have been examined to determine their relation to jitter and runtime. The end goal of research is to understand the factors...
Effects of axotomy on calcium influx in reticulospinal neurons of larval lamprey [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
properties of the RS neurons. During electrical activity (action potentials) in these neurons, calcium influx occurs through voltage-gated and chemical-gated calcium channels. First, previous research demonstrated that in injured RS neurons from lamprey...
Studies of opioid and sigma receptors in peripheral organs of mice [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
Throughout the body, various receptors mediate aspects of physiology and behavior by primary or modulatory roles, with broad consequences. Of particular interest are opioid receptors of three types (mu, delta and kappa) as well as sigma receptors...
Metered poppet valve [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
The metering poppet valve is a new design that is trying to maximize stability and performance. Poppet valves are typically not used as metering valves because they have stability issues. This new valve is trying to rectify ...
Interactive curve modeling: Creating and manipulating three dimensional objects using two dimensional input [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
In modern computer graphics, especially in the field of modeling and animation, polygons are the preferred method used to design three dimensional objects. However, because polygons are made up of vertices and linear edges, ...
The effect of genetic relatedness and diversity on parasite load in the North American raccoon (procyon lotor) [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
The influence of genetic relatedness and diversity on parasite transmission and diversity was examined in raccoons (Procyon lotor) from mid-Missouri. Relatedness and diversity of individuals was measured using 12 polymorphic ...
Investigation of the mechanical strength of explanted polypropylene hernia meshes [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
Over twenty million hernia repair surgeries are performed worldwide each year. Many of these repairs are accomplished through the use of a prosthetic mesh material rather than sutures because meshes have been shown to ...
Do all viruses utilize CRM1 dependent nuclear export? [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
The retroviral structural protein, Gag, is required for the assembly of infectious virus particles within a cell. To better understand how the viral assembly process occurs, it is important to understand the cellular ...
Development of a stably transfected cell line to screen for potential endocrine disrupting chemicals [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
Intro Estrogens are steroid hormones that diffuse across cell membranes to interact with estrogen receptors (ER) in the nucleus. An estrogen-bound ER acts as a transcription factor to regulate gene transcription in a cell. ...
Lung tissue expression of angiotensinogen in ren-2 rats [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
Pulmonary hypertension (PH) is a rapidly progressive disease that results in death. PH is characterized by increased vascular resistance, vascular remodeling, and right ventricular hypertrophy. Increased levels of ANG II ...
Substance use among college women with disordered eating attitudes and behaviors [abstract]
(University of Missouri--Columbia. Office of Undergraduate Research, 2007)
Disordered eating (e.g., binge eating, purging, fasting) is associated with high rates of psychiatric comorbidity and serious medical complications including death (Herzog et al., 2006). Past research has found substance-related disorders...