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- ItemOpen AccessMedical student health behaviors and the influence on patient outcomes(Colorado State University. Libraries, 2011) Jortberg, Bonnie, author; Harris, Mary, advisor; Cunningham-Sabo, Leslie, advisor; Kennedy, Catherine, committee member; Johnson, Susan, committee memberPurpose: Lifestyle habits are important risk factors for the development of cardiovascular disease, the leading cause of death in industrialized nations. The American Heart Association (AHA) and the National Cholesterol Education Program Adult Treatment Panel III (ATP III) recommend lifestyle changes as the primary and most cost-effective means of reducing the risk of coronary heart disease (CHD). Yet few physicians advise their patients about lifestyle modification. The main objective of this study was to determine if the nutrition and physical activity habits of medical students affect their patients' health behaviors on several important aspects of lifestyle modification: increased fruit, vegetable, and soy intake, and physical activity.
- ItemOpen AccessFinancing the U.S. deficit: adjustment mechanics between the U.S. and Japan(Colorado State University. Libraries, 2009) Qian, Shenglin, author; Vasudevan, Ramaa, advisor; Koontz, Stephen R., committee member; Braunstein, Elissa, committee memberJapan has run a large trade surplus with the U.S. and has financed the U.S. deficit for a long time, so the adjustment mechanism of financial flows between the U.S. and Japan is an important issue. In this paper, in order to investigate the capital flow between Japan and the U.S, I build a VAR model to study the fluctuations of interest rate spread between the U.S. and Japan and international reserve of Japan. The analysis of the Impulse Response Function suggests that the dynamic response to an event, such as the rise of the deficit of the U.S. is such that movements in the international reserve of Japan and the interest rate spread tend to restore equilibrium. To support my conclusion, I use the subset of the sample data to simulate and forecast the real event. The work shows that the model can accurately explain the adjustment process.
- ItemOpen AccessPerformance of Russet Norkotah line selections at different rates of nitrogen(Colorado State University. Libraries, 2003) Sather, Kent P., author; Thompson, Asunta L., advisor; Holm, David G., advisor; Nissen, Scott J., committee member; Wallner, Stephen J., committee memberRusset Norkotah line selections may be utilized to increase yields and profitability while reducing nitrogen applications normally required when producing Russet Norkotah. The Solanum tuberosum L. cultivar, Russet Norkotah, has increased in acreage since its release in 1987. Since the early 1990's, several breeding programs have made line selections that possess superior production potential under lower nitrogen rates. Five line selections and Russet Norkotah, were grown for two years at three rates of nitrogen in the San Luis Valley, Colorado. Selections included were Colorado 3 (CO3), Colorado 8 (CO8), Texas 112 (TXNS112), Texas 223 (TXNS223), and Texas 278 (TXNS278). The low, medium and high rates of nitrogen applied were approximately 100, 148 and 192 kilograms per hectare, respectively. Total and marketable yields generally increased as nitrogen rates increased. Yields were fairly consistent between years, except for standard Russet Norkotah. In 1998, selections at the low rate out yielded Russet Norkotah under higher rates. In 1999, selections grown under the low rate yielded similarly to Russet Norkotah at the high rate. Selections grown at the medium and high rate yielded significantly more. CO3 was the best producer overall. As vine fresh weight increased, tuber yield also increased. These results indicate acceptable tuber yields may be attained with Russet Norkotah line selections grown at lower nitrogen rates than currently used for standard Russet Norkotah production. Using Russet Norkotah line selections may result in increased profitability by increasing yields and reducing input costs, and may also minimize nitrogen loss due to leaching and run-off.
- ItemOpen AccessEvaluation of plant characteristics and disease resistance in Cu-ipt transformed watermelon cv. crimson sweet(Colorado State University. Libraries, 2004) Goktepe, Fahrettin, author; Hughes, Harrison G., advisor; Byrne, Patrick F., committee member; Vivanco, Jorge M., committee member; Hill, Joseph P., committee memberWatermelon cv. Crimson Sweet was transformed with the copper inducible isopentenyl transferase gene (Cu-ipt) via Agrobacterium mediated gene transformation process. The ipt gene governs the rate-limiting step in the cytokinin biosynthesis pathway. The transformants were confirmed via polymerase chain reaction (PCR) in the plant with ipt specific primers. Cu-ipt transformed plants were treated with copper sulfate at a concentration of 5, 10, or 50 μM copper sulfate to determine if the gene could be activated by copper at three levels. Transformed plants treated with copper sulfate differed in evaluated horticultural characteristics from those non-transformed as well as transformed plants not sprayed with copper sulfate. Delayed leaf senescence, increased chlorophyll content, reduced apical dominancy and released axillary buds were significantly different in Cu-ipt transformants compared to non-transformant plants. Significant reduction of seed number in watermelon fruit was also observed in copper sulfate treated Cu-ipt plants as compared to the non-transformant plants. Other than some slight alterations, elevated endogenous cytokinin level didn't cause major interference with transformants normal growth and development. The application of copper sulfate also induced resistance against Gummy Stem Blight disease in Cu-ipt transformants and their seedlings compared to the non-transformant plants.
- ItemOpen AccessBiocontrol of fusarium crown and root rot of fresh market tomato with trichoderma harzianum strains under greenhouse conditions(Colorado State University. Libraries, 2003) Ozbay, Nusret, author; Newman, Steven E., advisor; Hanson, Linda E., committee member; Hughes, Harrison G., committee member; Wallner, Stephen J., committee memberGreenhouse tomato growers in the United States have few products available for chemical control of plant pathogens. Biological control of soilborne plant pathogens by antagonistic microorganisms is a potential alternative to the use of chemical pesticides during greenhouse production. Biological control experiments were conducted to test the effects of commercial and noncommercial strains of Trichoderma harzianum against Fusarium oxysporum f. sp. radicis-lycopersici on tomato plants grown in two different hydroponic media, coir and rockwool. This study also investigated effects of strains on growth of tomato seedlings under greenhouse conditions. Trichoderma harzianum is a fungus that attacks a range of economically important phytopathogenic fungi. Tomato (Lycopersicon esculentum Mill., cultivar Caruso) plants were inoculated with T. harzianum strains (PlantShield™, T22 and T95) prior to challenge with the pathogen. They were applied to growing media prior to sowing and to roots at transplanting at two inocula densities, 106 or 107 conidia/ml. The results of this study demonstrated that T. harzianum strains, especially applied at transplanting, decreased Fusarium crown and root rot incidence 79% for coir and 73% for rockwool, decreased disease severity 45% for coir and 48% for rockwool, and increased fruit yield 37% for coir and 25% for rockwool on tomato for control. The results also demonstrated that Trichoderma harzianum strains improved tomato seedling growth.