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(21 - 40 of 19,611)
Pages
- Title
- The feasibility of establishing a feed analytical service for Michigan cattle feeders
- Creator
- Bortel, William Lee
- Date
- 1966
- Collection
- Electronic Theses & Dissertations
- Title
- A study of soil water movement as affected by drainage
- Creator
- Bornstein, Joseph
- Date
- 1949
- Collection
- Electronic Theses & Dissertations
- Title
- From synthesis to behavioral activity in streams : investigations of putative sea lamprey pheromone components
- Creator
- Brant, Cory Olaf
- Date
- 2011
- Collection
- Electronic Theses & Dissertations
- Description
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The sea lamprey (Petromyzon marinus L.) has become a model species in the study of bile acid production and release into the environment where these compounds function as intraspecific chemical signals. Throughout the later stages of their life history, sea lampreys have been shown to rely upon pheromone communication to mediate reproduction. Laboratory and stream behavioral bioassays have implicated 3-keto petromyzonol sulfate (3kPZS) as a lamprey mating pheromone, but the full function of...
Show moreThe sea lamprey (Petromyzon marinus L.) has become a model species in the study of bile acid production and release into the environment where these compounds function as intraspecific chemical signals. Throughout the later stages of their life history, sea lampreys have been shown to rely upon pheromone communication to mediate reproduction. Laboratory and stream behavioral bioassays have implicated 3-keto petromyzonol sulfate (3kPZS) as a lamprey mating pheromone, but the full function of this bile alcohol derivative remains to be elucidated. Further, the biosynthesis, regulation, and release of 3kPZS and other putative components of the pheromone remain only partially characterized. In Chapter 1 of this thesis, I observed the behaviors of migratory females to the presence of 3kPZS in streams across a typical migratory season. In Chapter 2, the synthesis, transport, and release of several steroid-derived compounds in adult male sea lampreys were further examined using analytical chemistry and molecular biology-based approaches in adult males. The data presented here further characterize the male mating pheromone in sea lamprey, contribute to the understanding of pheromone communication in vertebrates, and provide implications for controlling the invasive species in the Laurentian Great Lakes.
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- Title
- The synthesis and reactions of dichloromethaneboronic esters
- Creator
- Wu, Show-jen Grace
- Date
- 1971
- Collection
- Electronic Theses & Dissertations
- Title
- The effect of kind and concentration of sugar on gluten formation and character
- Creator
- Meiske, Donna Poland
- Date
- 1957
- Collection
- Electronic Theses & Dissertations
- Title
- Evaluation of passive UHF radio frequency identification transponder performance using different packaging materials
- Creator
- Zhang, Yuanchenxi
- Date
- 2018
- Collection
- Electronic Theses & Dissertations
- Description
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Radio Frequency Identification (RFID) technology plays an important role in supply chains by providing possibilities of improved security, efficiency and visibility of item tracking and management. In order to achieve the expected functionality of RFID technology, it is critical to understand factors that influence RFID transponder performance.The objective of this research was to determine the effect of packaging materials on the performance of passive UHF RFID transponders in a simulated...
Show moreRadio Frequency Identification (RFID) technology plays an important role in supply chains by providing possibilities of improved security, efficiency and visibility of item tracking and management. In order to achieve the expected functionality of RFID technology, it is critical to understand factors that influence RFID transponder performance.The objective of this research was to determine the effect of packaging materials on the performance of passive UHF RFID transponders in a simulated manufacturing environment. Three general-purpose passive transponders were tested when they were attached to four packaging materials. Performance parameters of read range, which is the maximum distance the transponder can be detected by the interrogator, and orientation read rate, which is the percentage of orientations in which the transponder was read, out of the randomly chosen set of orientations evaluated based on rotation, tilt, or incline of the transponder within three-dimensional space, were quantified and analyzed. The results showed that packaging materials had a consistent effect on read range and orientation read rate across different antenna designs of passive dipole antenna transponders. Transponder antenna designs had a significant effect on read range and orientation read rate. Interrogator antenna polarizations had a significant effect on transponder read range but did not have a consistent effect on transponder orientation read rate.
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- Title
- The influence of low temperature treatments on the development of Tulipa Sp
- Creator
- Schwartz, John Frederick
- Date
- 1968
- Collection
- Electronic Theses & Dissertations
- Title
- Milk production and related factor response of dairy herds after enrollment on a production testing program
- Creator
- Schramski, Edward Alfred
- Date
- 1969
- Collection
- Electronic Theses & Dissertations
- Title
- Investigation of racial and socioeconomic disparities in asthma hospitalizations in metropolitan Detroit, Michigan
- Creator
- Barnes, Lonnie
- Date
- 2018
- Collection
- Electronic Theses & Dissertations
- Description
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Racial health disparities are a consistent problem in the United States. Compared to whites, African Americans experience worse health outcomes both in terms of morbidity and mortality from various forms of chronic and infectious disease and continue to have lower life expectancy at birth. The causes of these disparities are not always immediately apparent, but previous literature on the topic indicates that they are rooted in larger structures of inequality which render disadvantaged...
Show moreRacial health disparities are a consistent problem in the United States. Compared to whites, African Americans experience worse health outcomes both in terms of morbidity and mortality from various forms of chronic and infectious disease and continue to have lower life expectancy at birth. The causes of these disparities are not always immediately apparent, but previous literature on the topic indicates that they are rooted in larger structures of inequality which render disadvantaged populations more exposed and susceptible to disease. This study investigates the racial and socioeconomic dimensions of morbidity due to asthma, an increasingly-common chronic condition of poorly-understood etiology in metropolitan Detroit, an urban area marked by high levels of racial segregation and economic inequality. Data on asthma hospitalizations from the Healthcare Cost and Utilization Project were used, along with socioeconomic indicators from the U.S. Census Bureau, to (a) ascertain the magnitude of racial disparities in asthma hospitalization, (b) identify risk factors for hospitalization, and (c) determine the extent to which these risk factors explain any racial disparities. Descriptive statistics indicate that even after controlling for ZIP code socioeconomic position, black hospitalization rates for asthma were considerably higher than white rates at all levels of the socioeconomic hierarchy. Results of logistic regression models indicate that factors such as type of insurance and having other conditions in addition to asthma affect the risk of hospitalization for the condition but are able to account for only a small portion of the increased odds of hospitalization in the study area’s African American population. The findings highlighted in this study are important, but also demonstrate the necessity for further research on this topic.
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- Title
- Congressional election patterns : party trends and district rank order relationships, 1942-1956
- Creator
- Miller, Richard Lester
- Date
- 1961
- Collection
- Electronic Theses & Dissertations
- Title
- Empowerment and critical consciousness : an investigation of women's beliefs about wife-beating in Kenya
- Creator
- Bur, Alaina Marie
- Date
- 2018
- Collection
- Electronic Theses & Dissertations
- Description
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This study investigates the role of culture in women’s empowerment in Kenya. Kenya serves as an ideal case study because it has strong ethnic and cultural diversity and a high proportion of men and women who justify the patriarchal practice of wife-beating. This investigation employs the women’s surveys from the 2014 round of the Demographic and Health Survey (DHS) in Kenya to perform logistic regressions of factors shaping a woman’s justification of wife-beating across five hypothetical...
Show moreThis study investigates the role of culture in women’s empowerment in Kenya. Kenya serves as an ideal case study because it has strong ethnic and cultural diversity and a high proportion of men and women who justify the patriarchal practice of wife-beating. This investigation employs the women’s surveys from the 2014 round of the Demographic and Health Survey (DHS) in Kenya to perform logistic regressions of factors shaping a woman’s justification of wife-beating across five hypothetical scenarios that can occur between a husband and wife. Results reveal that there are significant differences in women’s beliefs about wife-beating across ethnic groups, educational categories, and experience migrating. I draw on Swidler’s theory of culture to draw two conclusions from these findings. First, Kenyan ethnic groups are a source of culture that women draw on to form their repertoire of patterned action and belief during periods of settled life. Second, education and migration represent Kenyan women’s encounters with new gender ideology and experiences with resocialization during periods of unsettled life. These experiences offer opportunities for women to gain critical consciousness, or a reflexive vantage point from which they can assess whether their culture’s gender beliefs about wife-beating are, indeed, unjust.
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- Title
- Action and interaction in the social dyad : temporal measures of verbal behavior
- Creator
- Yamanaka, Kathleen Takako
- Date
- 1969
- Collection
- Electronic Theses & Dissertations
- Title
- Analysis of a method of training the mentally retarded
- Creator
- Yascolt, Marjorie Ann
- Date
- 1966
- Collection
- Electronic Theses & Dissertations
- Title
- An empirical investigation comparing the effectiveness of four scoring strategies for the Kuder Occupational Interest Survey form DD
- Creator
- Olejnik, Stephen Francis, 1950-
- Date
- 1974
- Collection
- Electronic Theses & Dissertations
- Title
- Farm mechanization of the small holdings in Surinam
- Creator
- Olf, Marius Eugene G.
- Date
- 1962
- Collection
- Electronic Theses & Dissertations
- Title
- Electromagnetic radiation from automotive ignition circuits
- Creator
- Schallhorn, Thomas Lee
- Date
- 1976
- Collection
- Electronic Theses & Dissertations
- Title
- The mass fire potential of urban structure and form
- Creator
- Schar, Stephen Warren
- Date
- 1969
- Collection
- Electronic Theses & Dissertations
- Title
- Do changes in maize prices and input prices affect smallholder farmers' soil fertility management decisions? : panel survey evidence from Kenya
- Creator
- Olson, David William
- Date
- 2018
- Collection
- Electronic Theses & Dissertations
- Description
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Soil degradation, low cereal yields, and poor yield response to inorganic fertilizer are serious problems in many parts of sub-Saharan Africa (SSA), including Kenya. Soil fertility management (SFM) practices such as maize-legume intercropping and organic fertilizer use, particularly when used jointly with inorganic fertilizer, have the potential to increase yields and yield response to inorganic fertilizer and improve soil health. However, relatively little is known about the drivers of...
Show moreSoil degradation, low cereal yields, and poor yield response to inorganic fertilizer are serious problems in many parts of sub-Saharan Africa (SSA), including Kenya. Soil fertility management (SFM) practices such as maize-legume intercropping and organic fertilizer use, particularly when used jointly with inorganic fertilizer, have the potential to increase yields and yield response to inorganic fertilizer and improve soil health. However, relatively little is known about the drivers of adoption of such SFM practices, including their joint use. Moreover, it is often suggested that African farmers will respond to an increase in the maize price they expect to receive at the next harvest by increasing investment in their soils or that they might alter their use of SFM practices in response to changes in input prices. Yet previous studies largely ignore the role of such prices. Using nationwide household panel survey data from Kenya, we first predict the maize price a household can expect to receive at the upcoming harvest based on observables at the time they make SFM decisions; we then estimate the effects of changes in this predicted maize price and input prices on household adoption decisions for individual SFM practices and combinations thereof. Likely due to multiple market failures, we find that Kenyan smallholders’ SFM adoption decisions are largely insensitive to changes in prices; however, there is some evidence that they are more likely to use organic fertilizer and use less inorganic fertilizer per acre when inorganic fertilizer prices rise.
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- Title
- Effect of centrifugation on root initiation in Vaccinium corymbosun, L. and Salix alba, L
- Creator
- Siripong, Dusit
- Date
- 1966
- Collection
- Electronic Theses & Dissertations
- Title
- A study of empathic ability and of the validity of some indices of job satisfaction
- Creator
- Schell, William Adolph
- Date
- 1954
- Collection
- Electronic Theses & Dissertations