Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 10 of 10 for “"reproductive problems"”.
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Reasons Why Cows Were Removed From the SDSU Fairy Herd 1. Discriminant Analysis to Classify Cows with or without Reproductive Problems
… is the ability of management to detect herd problems and correct them instead of culling cows. It is well known that the average productive life of the dairy cow is less than 4 yr, which is short compared with her potential life. Involuntary removal of cows causes economic loss directly as a …
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Caracterização dos motivos de descarte e estimativas de parâmetros genéticos para longevidade de vacas da raça holandês
… were analyzed. The main culling reasons were reproductive problems (23.02%), followed by milk production (20.82%) and health issues (20.39%). About 58% of the cows were culled after 47 months of age. Economic-related culling frequencies were lower than expected until 2014 and higher between …
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Monitoring and improving reproductive performance of crossbred dairy cattle in Tigray Region, Ethiopia
… an extensive livestock population; however, reproductive performance of cattle and their breeding management are unsatisfactory. Currently, the sole diagnostic tool in the country is rectal palpation, which is inaccurate for early pregnancy in cattle. The study assessed reproductive …
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Health Starts in the Home: An Assessment of Efforts to Improve Occupant Health through Healthy Building Materials in San Francisco’s Affordable Housing
… cancer, neurodevelopmental issues, and reproductive problems (Bayer et al., n.d.; Green Science Policy Institute). Furthermore, these chronic health conditions disproportionately affect low-income populations. Fortunately, substantial efforts in research, practice, and policy are working …
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Day-to-Day Variation in the Feed Consumption of Dairy Cows in Early Lactation
… lactation and may reduce the risk of health or reproductive problems. Overall, the exponential model was consistently more accurate and robust than the current NRC equation. Together with cosinor model it explained most of the day-to-day variation in the feed consumption of dairy cows in early …
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AVALIAÇÃO ANDROLÓGICA E ULTRASSONOGRAFIA DOPPLER EM GARANHÕES QUARTO DE MILHA
… blood perfusion, where any alteration can cause problems in their function. Thus, the diagnosis through Doppler ultrasonography can show reproductive problems. The aim of this study was to evaluate the correlation between testicular hemodynamics and sperm quality, emphasizing sperm motility. Six …
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Immunomodulatory Effects of Diethylstilbestrol During Prenatal and Adult Life
… with prenatal DES treatment. So far only reproductive problems such as infertility, neoplastic diseases of the cervix and vagina and testicular cancers have been well-documented in DES cases. Immunological abnormalities associated with DES are only now beginning to be recognized. …
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Development of multi-residue and selective methods for the ultra-sensitive determination of endocrine disrupting chemicals in aqueous samples
… disrupting chemicals (EDCs) were linked to reproductive problems like the decrease in fertility of bird. Since then, there is a growing scientific concern, public debate and media attention over the possible effects on wildlife and humans that may result from exposure to chemicals that have …
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Fabrication of Macadamia Nutshell Powder-AI/Fe Metal Oxide Modified Diatomaceous Earth Composite Beads for Fluoride and Pathogen Removal Groundwater
… effects, including gastrointestinal illness, reproductive problems, and neurological disorders. This study aims to fabricate macadamia nutshell powder-Al/Fe metal oxide modified DE composite beads for removal of fluoride, pathogen from groundwater. The physicochemical compositions of the …
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Interaction of the porcine reproductive and respiratory syndrome virus with the macrophage-specific lectin sialoadhesin
The porcine reproductive and respiratory syndrome virus (PRRSV) causes the economically most important viral disease in swine industry today. The virus is a major threat to swine health worldwide, since it is both associated with the porcine respiratory disease complex and the cause of severe …