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Now showing items 21-36 of 36
Characterization of diverse soybean genotypes for phosphorus uptake and use efficiency
(University of Missouri--Columbia, 2021)
Soybean (Glycine max L. Merrill) is one of the most important legume crops grown worldwide. However, without phosphorus (P) fertilization, soybean yields often are limited by phosphorus availability. Phosphorus is an ...
Merging technology development of trapped ion mobility spectrometry quadrupole time-of-flight mass spectrometry with biological investigation of Medicago truncatularoot exudates
(University of Missouri--Columbia, 2020)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] "New commercial ion mobility instrumentation has the potential to improve current analytical techniques, but developments need to be applicable to real-world problems...
Motivation for smoking and smoking cessation : a self-determination theory investigation
(University of Missouri--Columbia, 2019)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Nicotine dependence is conceptualized as a disorder of motivation. Initial drug use is goal-directed, but with the development of dependence it becomes increasingly routinized...
The use of pluripotent stem cells as a model for early human placentation
(University of Missouri--Columbia, 2018)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Throughout gestation, the placenta plays a critical role in ensuring proper development of the fetus. The placenta functions to exchange nutrients, oxygen, and fetal waste...
The role of genetic and phenotypic diversity in maize and its effects on aflatoxin accumulation by the fungus Aspergillus flavus
(University of Missouri--Columbia, 2008)
Accumulation of the potent carcinogen, aflatoxin, in maize poses a significant health risk to humans and animals. Most commercially grown maize lines are susceptible to infection by the fungus that synthesizes aflatoxin, ...
Three essays on labor economics
(University of Missouri--Columbia, 2021)
This dissertation addresses labor market issues. The first two chapters deal with employment issues during the great recession using nationally representative data from the Survey of Income and Program Participation. The ...
The demography of Atlantic brant (Branta bernicla hrota)
(University of Missouri--Columbia, 2022)
Animal population dynamics are driven by variation in survival and productivity. Long-lived species such as Arctic-nesting geese often are characterized by high adult survival and low but highly variable annual reproductive ...
Development of Random Triblock Copolymer Based Nanoparticulate Formulation for Sustained Release of Macromolecules/Biologics in Treatment of Posterior Segment Ocular Diseases
(University of Missouri -- Kansas City, 2018)
Random triblock copolymers (RTB) were successfully synthesized by ring opening
copolymerization method. RTB copolymers are composed of FDA approved materials such as
polyethylene glycol (PEG), glycolide (GA), lactide ...
The yield and composition of the milk of dairy cows and goats as influenced by thyroxine
(University of Missouri, College of Agriculture, Agricultural Experiment Station, 1940)
Biotic interactions in the fossil record: an investigation on the patterns of predation and parasitism of Plio-Pleistocene bivalves from the Nashua Formation of Florida
(University of Missouri--Columbia, 2022)
representing 34 genera among 21 families. Traces indicative of predatory drill holes were the dominant trace type (7.7 percent; n=154) followed by trematode-induced pits and igloo-like structures (2.2 percent; n=45) and polydorid-induced traces (1.7 percent; n...
Soil surface-seal measurement using high-resolution x-ray computed tomography (HRCT)
(University of Missouri--Columbia, 2006)
Rainfall on bare soil breaks soil aggregates, detaching particles, plugging pores and decreasing porosity in the top few mm of soil. This reduces hydraulic conductivity and increases runoff through a process known as surface ...
Kinematic assessment for stroke patients in a stroke game and a daily activity recognition and assessment system
(University of Missouri--Columbia, 2022)
Stroke is the leading cause of serious, long-term disabilities among which deficits in motor abilities in arms or legs are most common. Those who suffer a stroke can recover through effective rehabilitation which is ...
Genetic architecture and marker-assisted breeding for salt tolerance in soybean
(University of Missouri--Columbia, 2018)
Salinity is one of the major abiotic stresses that inhibits plant growth and causes seed yield loss in soybean. Although a major gene for salt tolerance on chromosome (Chr.) 3 was mapped, cloned and characterized, it does ...
Birth order and gender : differential parental investment in Medieval England and France in the eleventh, twelfth, and thirteenth centuries
(University of Missouri--Columbia, 2020)
This dissertation addresses the question: will parents invest differently in their children based on gender and birth order? Using parental investment theory and four major sets of outcome variables--child survival, parental ...
Leveraging large scale beef cattle genomic data to identify the architecture of polygenic selection and local adaptation
(University of Missouri--Columbia, 2020)
Since the invention of the first array-based genotyping assay for cattle in 2008, millions of animals have been genotyped worldwide. Leveraging these genotypes offers exciting opportunities to explore both basic and applied ...
An economic analysis of the agricultural development potential for Southern Honduras
(University of Missouri--Columbia, 1975)
The study was conducted in the Valle and Choluteca Districts of Southern Honduras in 1974. The objectives of the study were (1) to identify input-output relationships for selected crops; (2) determine current and potential ...