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Dairy Science Commons™

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2018

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Articles 61 - 63 of 63

Full-Text Articles in Dairy Science

The Use Of Machine Learning To Detect Suckling In Pre-Weaned Calves, Sukumar Katamreddy Jan 2018

The Use Of Machine Learning To Detect Suckling In Pre-Weaned Calves, Sukumar Katamreddy

Theses

The weaning of cattle is a process which is known to be labour intensive and to have stressful effects on both cow and calf Common methods used in the weaning process include the temporary removal of a mother from the calf and manual observation and intervention. Early and speedy weaning is known to have a number of benefits, including health benefits for both cow and calf, additional weight gains for the calves as well as reduced labour and feed requirements. The process known as Two-Stage Weaning is recognised to be an effective low-stress approach to weaning in which the calf …

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Comparing Dairy Farm Performance And Heat Stress Abatment Strategies In The United States Using Summer To Winter Ratios, Jenna M. Guinn Jan 2018

Comparing Dairy Farm Performance And Heat Stress Abatment Strategies In The United States Using Summer To Winter Ratios, Jenna M. Guinn

Theses and Dissertations--Animal and Food Sciences

Heat stress abatement is a challenge for producers in the United States, especially in the southern states. Dairy producers could benefit by having a simply metric to measure heat stress abatement strategies with the goal of motivating improvement in heat stress management. Managing heat stress is key to ameliorating the effects on dairy cow performance. A study was performed to explore the use of a heat stress metric called the Summer to Winter performance ratio (S:W ratio), to quantify and compare farm performance variables among regions of the United States. Summer to Winter ratios were closest to 1.0 in the …

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Effect Of Extracellular Atp On Cellular Actin Fibrils' Location And Characteristics, Dianna Huisman Jan 2018

Effect Of Extracellular Atp On Cellular Actin Fibrils' Location And Characteristics, Dianna Huisman

Honors Program Theses

Epithelial cells lining secretory units and ducts of bovine mammary glands perform an important role in regulating movement of various macromolecules and whole cells during normal lactation and mastitis. During mastitis, host-and bacteria-produced substances can affect the “barrier” function of epithelial monolayers. One potential component is adenosine triphosphate (ATP). ATP likely interacts with P2X7, a purinergic receptor, in mediating some effects associated with mastitis including changes in cell permeability. The bovine mammary gland epithelial cell line, Mac-T cells, were examined for cytoskeletal changes as result of P2X7 interactions. Actin cytoskeletons were stained with phalloidin and effects were examined by fluorescent …

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