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Tesi sul tema "Cattle Physiology"

Autore: Grafiati

Pubblicato: 4 giugno 2021

Ultima modifica: 31 gennaio 2023

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1

Beatty, David Thomas. "Prolonged and continuous heat stress in cattle: physiology, welfare, and electrolyte and nutritional interventions." Thesis, Beatty, David Thomas (2005) Prolonged and continuous heat stress in cattle: physiology, welfare, and electrolyte and nutritional interventions. PhD thesis, Murdoch University, 2005. https://researchrepository.murdoch.edu.au/id/eprint/258/.

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Abstract (sommario):

The live export of cattle is an important industry for Australia. Concerns have arisen about animal welfare and in particular heat stress which may cause production losses and death. Cattle shipped live to the Middle East from a southern Australian winter can face continuous and prolonged periods of high heat and humidity as they cross the equator and arrive into a northern hemisphere summer, leading to heat stress and excessive heat load. Some live animal exporters treat heat stressed cattle with electrolyte supplements, but no scientific data exists as to whether this is beneficial to cattle

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2

Beatty, David Thomas. "Prolonged and continuous heat stress in cattle : physiology, welfare, and electrolyte and nutritional interventions /." Beatty, David Thomas (2005) Prolonged and continuous heat stress in cattle: physiology, welfare, and electrolyte and nutritional interventions. PhD thesis, Murdoch University, 2005. http://researchrepository.murdoch.edu.au/258/.

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Abstract (sommario):

The live export of cattle is an important industry for Australia. Concerns have arisen about animal welfare and in particular heat stress which may cause production losses and death. Cattle shipped live to the Middle East from a southern Australian winter can face continuous and prolonged periods of high heat and humidity as they cross the equator and arrive into a northern hemisphere summer, leading to heat stress and excessive heat load. Some live animal exporters treat heat stressed cattle with electrolyte supplements, but no scientific data exists as to whether this is beneficial to cattle

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3

Hayes, Marianne Kay. "Bovine testicular cells in vitro: establishment of primary cultures and investigations of secretory functions : a thesis presented for the degree of Doctor of Philosophy in the University of Adelaide." Title page, contents and summary only, 1986. http://web4.library.adelaide.edu.au/theses/09PH/09phh4178.pdf.

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Includes bibliographical references (leaves 98-128). Investigates protein secretion by bovine Sertoli cells in culture. Cultures were obtained from bulls at all stages of post natal development and from sexually mature animals.

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4

Theurer, Miles E. "Objective monitoring of cattle." Diss., Kansas State University, 2015. http://hdl.handle.net/2097/32794.

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Doctor of Philosophy<br>Department of Diagnostic Medicine/Pathobiology<br>Robert L. Larson<br>Bradley J. White<br>There are multiple modalities available to evaluate health or stress status of animals. The objective of my research was to evaluate different modalities including behavior, rectal and nasal temperature, and blood samples to determine the relationship with these outcomes of interest in bovine respiratory disease (BRD) events, environmental conditions, transportation, and Mannheimia haemolytica challenge model. The objective for the final project was to determine whether diagnostic

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5

Collinder, Eje. "Intestinal functions in animals : an experimental study on horses, pigs, cows and fish /." Stockholm : Karolinska Univ. Press, 2001. http://diss.kib.ki.se/2001/91-7349-066-0/.

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6

Kruk, Zbigniew Antoni. "Genetic and non-genetic factors affecting carotenoid concentration in cattle tissues : a thesis for the degree of Doctor of Philosophy at the University of Adelaide in the Department of Animal Science." Title page, table of contents and abstract only, 2001. http://web4.library.adelaide.edu.au/theses/09PH/09phk94.pdf.

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Includes bibliographical references (leaves 178-194). Genetic and non-genetic factors affecting fat colour in cattle were examined in biopsy and carcass samples of Jersey and Limousin cattle in their F1 and backcross progeny.

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7

Mena, Humberto 1959. "Factors affecting uptake of gossypol in cattle." Diss., The University of Arizona, 1997. http://hdl.handle.net/10150/288761.

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Experiments were conducted to determine effects of feeding whole cottonseed (WCS), expander solvent cottonseed meal (CSM), or a combination of these, as well as other factors on blood gossypol concentrations in cattle. In an 84 d trial, lactating cows were fed zero, 900 or 1800 ppm total gossypol (TG) in diets from WCS and/or CSM. Plasma gossypol (PG) in cows receiving 1800 ppm TG plateaued at 3.28 μg/ml after 28 d. However, by 28 d, erythrocyte fragility increased for cows receiving WCS diets. Plasma chemistry, vitamin A, body temperatures, and respiration rates were within normal ranges. Ser

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8

Lomas, Caroline Anne. "The effect of supplementary light on the behaviour, physiology and productivity of cattle." Thesis, Bangor University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.239841.

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9

Nguyen, Quant. "The myofibrillar and connective tissue content of selected bovine muscles and porcine cardiac and skin tissues /." Thesis, McGill University, 1987. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=66137.

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10

Harstine, Bo R. "Novel Approaches to Positively Impact the Early Life Physiology, Endocrinology, and Productivity of Bulls." The Ohio State University, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=osu1480521360099455.

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11

Li, Shihhui. "Angiopoietin-like protein 4 in bovine physiology." Thesis, Kansas State University, 2011. http://hdl.handle.net/2097/13107.

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Abstract (sommario):

Master of Science<br>Department of Animal Sciences and Industry<br>Barry Bradford<br>Angiopoietin-like protein 4 (ANGPTL4) is a 55-kDa secreted glycoprotein which is an important factor for regulation of energy and lipid metabolism. Plasma ANGPTL4 has the ability to inhibit lipoprotein lipase (LPL) function by preventing it from catalyzing hydrolysis of lipoprotein triglyceride, which contributes to ANGPTL4’s ability to decrease fat storage. Furthermore, research in mice suggests that gut microbes suppress gastrointestinal ANGPTL4 production, and that decreased plasma ANGPTL4 concentrations pr

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12

au, dbeatty@murdoch edu, and David Beatty. "Prolonged and continuous heat stress in cattle: Physiology, welfare, and electrolyte and nutritional interventions." Murdoch University, 2005. http://wwwlib.murdoch.edu.au/adt/browse/view/adt-MU20060831.144000.

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Abstract (sommario):

The live export of cattle is an important industry for Australia. Concerns have arisen about animal welfare and in particular heat stress which may cause production losses and death. Cattle shipped live to the Middle East from a southern Australian winter can face continuous and prolonged periods of high heat and humidity as they cross the equator and arrive into a northern hemisphere summer, leading to heat stress and excessive heat load. Some live animal exporters treat heat stressed cattle with electrolyte supplements, but no scientific data exists as to whether this is beneficial to cattle

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13

Riekert, Sydney Peter. "The influence of slaughter on blood composition in cattle." Thesis, University of the Witwatersrand, 1986. http://hdl.handle.net/10539/20118.

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In this study the effects of blood sampling, transportation and slaughter on certain blood variables (sodium, potasium, chloride, glucose, lactates, lipids, proteins, colloidal osmotic pressure, cortisol, ACTH, T3, TSH, osmolality etc.) of cattle were investigated. The experimental animals, crossbreed (Brahman, Afrikander and Hereford) heifers and oxen obtained from Kanhym Estates, Middelburg, were unaccustomed to handling. One group of animals was subjected to the stress of sampling with restraint, a second group was sampled with restraint after transportation and a third group had bl

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14

Warner, Sharon Elaine. "Foot design, locomotor impact dynamics and pathology in large mammals." Thesis, Royal Veterinary College (University of London), 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.618328.

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15

Nguyen-Bresinsky, Dong Thi. "Immunopurification of Bovine Placental Lactogen." Fogler Library, University of Maine, 2005. http://www.library.umaine.edu/theses/pdf/Nguyen-Bresinsky2005.pdf.

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16

Burke, Christopher R. "Regulation of Ovarian Follicular Development with Estradiol in Cattle." The Ohio State University, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=osu1054666226.

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17

Lee, Tiffany. "The effects of intake on steers administered anabolic implants." Thesis, Kansas State University, 2012. http://hdl.handle.net/2097/13890.

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Master of Science<br>Department of Clinical Sciences<br>Daniel Thomson<br>The objectives of this study were to examine the effect of anabolic implants on nutrient balance, metabolic status, and growth factors in animals consuming nutrients either adequate or inadequate to support growth. Sixteen crossbred steers (BW 293 ± 19.3 kg) were trained to individual Calan gates, and randomly assigned to one of four treatments in a 2x2 factorial arrangement: (1) administration of an anabolic growth implant, and fed a moderate energy starting cattle diet at 2.0 × maintenance; (2) implant administration,

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18

MacKintosh, Sian Bethan Patricia. "Development of 3D cultural models of epithelial and stromal cells to study the pathophysiology of the bovine endometrium." Thesis, Royal Veterinary College (University of London), 2011. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.572141.

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19

Seymour, William Matthew. "Effect of body condition and ration protein source on performance of high producing cows during early lactation." Thesis, Virginia Tech, 1985. http://hdl.handle.net/10919/41560.

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<p>Forty-two high producing Holstein cows were paired by body condition and mature equivalent milk production and fed either a high or low energy complete ration ad libitum during the last 16-20 weeks of lactation. Cows fed the high energy ration ate more feed, produced more milk and gained more body condition than cows fed the low energy ration. Cows were fed to maintain condition during the dry period. During weeks 3-15 of the next lactation, half the cows in each condition group (fat or thin) were fed a mixed ration with soybean meal (SBM) as the major protein source. The remaining

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20

Chester-Jones, Hugh. "Physiological effects of feeding high magnesium levels to steers." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/54264.

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Abstract (sommario):

A 130-d study was conducted with 24 363kg steers allotted to four diets containing .3 (basal), 1.4, 2.5 and 3.7% Mg, dry basis. An attempt was made to feed cattle on all treatments equal amounts of the basal diet, but steers fed the two high levels refused some feed. Grab fecal samples were collected during nine 10-d periods. Chromic oxide was used as a digesta marker. Jugular blood samples were taken on d 1, 5, 10, 20 and every 10 d thereafter. Steers were sacrificed at the end of the study for gross pathological and histological observations and tissue samples were taken for mineral analysis

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21

Rodriguez, Maria A. (Maria Angeles) 1958. "Physiological responses to 60 Hz electric and magnetic fields in dairy cows under short photoperiod conditions." Thesis, McGill University, 2003. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=84426.

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This study consisted of a series of experiments designed to test the hypothesis that exposure to extremely low frequency (ELF) electric and magnetic fields (EMF), similar to those generated by power transmission lines, can modify the response to photoperiod in dairy cows. Thirty two Holstein cows, 16 pregnant and lactating and 16 non-pregnant and non-lactating, maintained under short photoperiod (8 h light, 16 h dark), were exposed to an electric field of 10 kV/m and a magnetic field of 30 muTesla for 16 h/d, using cross-over experimental designs with three-period sequences. These expos

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22

Brake, Derek William. "Effects of duodenal amino acid infusion on small intestinal starch digestion in cattle." Diss., Kansas State University, 2012. http://hdl.handle.net/2097/15071.

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Doctor of Philosophy<br>Department of Animal Sciences and Industry<br>Evan C. Titgemeyer<br>Previous data suggest that greater amounts of postruminal protein increase small intestinal starch digestion in cattle. Duodenally and ileally cannulated steers were used in 5 studies to measure responses in small intestinal starch digestion to amino acids (AA) or casein. Flows of starch to the ileum from the diet were small. Small intestinal starch digestibility was 34.0% when raw cornstarch was continuously infused into the duodenum. Infusion of casein linearly increased (P ≤ 0.05) small intestinal s

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23

Carter, Jessica Meagan. "PERFORMANCE AND PHYSIOLOGY OF YEARLING STEERS GRAZING TOXIC TALL FESCUE AS INFLUENCED BY CONCENTRATE FEEDING AND STEROIDAL IMPLANTS." UKnowledge, 2008. http://uknowledge.uky.edu/gradschool_theses/569.

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Fescue toxicosis can produce negative effects on animal weight gain and physiology. Sixty-four steers were grazed on endophyte-infected (E+) KY-31 tall fescue for 77 days in 2007 and sixty steers grazed for 86 days in 2008 to evaluate interactions with implantation of steroidal implants and concentrate feeding on performance and physiology of yearling steers. Steers were stratified by body weight for assignment to six, 3.0-ha toxic tall fescue pastures. The main plot treatment of with or without pelleted soybean hulls (SBH) were randomly assigned to pastures. Pelleted SBH were group-fed to pro

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24

Batchelder, Cynthia A. "Cloning in cattle : effect of the nuclear-donor cell on cloning efficiency, perinatal physiology, and long-term health of cloned calves /." For electronic version search Digital dissertations database. Restricted to UC campuses. Access is free to UC campus dissertations, 2005. http://uclibs.org/PID/11984.

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25

Kazmer, Gary Wayne. "Aspects of lactation endocrinology: I. lactogenic receptors in bovine mammary tissue at different stages of lactation: II. growth hormone concentrations in Holstein cattle of differing genetic merit." Diss., Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/52298.

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Mammary tissue from nine Holstein cows was collected within one week of parturition, at 60 and 180 days postpartum. Blood samples were collected at 6-hr intervals from two days prior to . until two days after surgery. A membrane-enriched fraction of tissue homogenates was prepared by differential centrifugation. Displacement curve data was analyzed by a microcomputer program. Mean prolactin (Prl) during the periparturient period was greater than either postpartum period, but not prior to biopsy. Dissociation constants (Kd) estimated with NIH-bPRL-6 as competitor were not different among stages

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26

McFadden, Thomas Bernard. "Influence of hormones on synthesis and secretion of milk proteins by mammary tissue from male and female cattle of beef and dairy breeds." Thesis, Virginia Polytechnic Institute and State University, 1985. http://hdl.handle.net/10919/101238.

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The ability of mammary tissue from prepubertal bulls and heifers of beef and dairy breeds to respond to hormonal stimuli through synthesis and secretion of milk proteins was studied. Experimental animals were six to eight month old Angus and Holstein cattle. All subjects were injected with estradiol and progesterone for seven days and slaughtered on day 15. Mammary tissue was explanted and cultured for 96 h in basal medium (B) which contained hormones necessary for maintenance, or stimulatory medium (P), further supplemented with prolactin. Selected cultures were incubated for 24 h in B or P m

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27

Burchard, Javier F. "Effects of 60 Hz electric and magnetic fields on productivity, reproductive hormones, plasma minerals and minerals and neurotransmitter metabolites in cerebrospinal fluid in dairy cattle." Thesis, McGill University, 1996. http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=41992.

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This study was designed to determine the potential biological effects of electric and magnetic fields (EMF), generated by 735 kV alternating current (AC) high tension lines upon the hormonal profile, some health-related parameters, stress response and productivity in dairy cattle. An EMF exposure chamber to house eight animals at one time was constructed. Forty-nine cows were divided according to their production stage; 8 pregnant non-lactating cows, 16 pregnant lactating cows, 16 non-pregnant lactating cows and 9 non-lactating non-pregnant heifers. They were exposed to an EMF of 10 kilovolts

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28

McCann, P. J. J. "Aspects of the ecology and physiology of the Eurasian badger (Meles meles L.), cattle management and the epidemiology of bovine tuberculosis (Mycobacterium bovis)." Thesis, Queen's University Belfast, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.268440.

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29

Wilson, Jonathan Wesley. "Lysine and methionine transport by bovine jejunal and ileal brush border membrane vesicles." Diss., Virginia Polytechnic Institute and State University, 1988. http://hdl.handle.net/10919/54464.

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Purified brush border and basolateral membranes were isolated from homogenized intestinal enterocytes of Holstein steers by divalent cation precipitation followed by differential and sucrose density gradient centrifugation. Membrane marker enzymes were used to determine the effectiveness of the fractionation procedure. Alkaline phosphatase and sodium-potassium adenosine triphosphatase served as the marker enzymes for the brush border and basolateral membranes, respectively. The brush border fraction was enriched 5.1-fold over the cellular homogenate. Purification of 10.1-fold over cellular hom

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30

Abreu, Fernanda Martins de. "The Effect of Progesterone Concentrations during Follicular Development in Cattle on Luteinizing Hormone Secretion, Follicular Development, Oocyte Competence and Fertility." The Ohio State University, 2015. http://rave.ohiolink.edu/etdc/view?acc_num=osu1420620191.

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31

Crites, Benjamin R. "COMPARISON OF CONCEPTION RATES IN BEEF CATTLE INSEMINATED WITH EITHER SEXEDULTRA™ SEX-SORTED SEMEN OR CONVENTIONAL SEMEN IN FIXED-TIME ARTIFICIAL INSEMINATION (FTAI) PROTOCOLS." UKnowledge, 2017. https://uknowledge.uky.edu/animalsci_etds/80.

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Estrous synchronization and artificial insemination (ESAI) are reproductive technologies that cattlemen can use to improve the reproductive performance of their herds. Controlling the gender ratio of the calf-crop can also improve the opportunity for increased revenue and profit. Producers are able to shift and/or control the gender ratio of their calf crop by incorporating sex-sorted semen into their AI programs. However, decreased conception rates to AI have been previously observed when sex-sorted semen was used in comparison to conventional semen of the same sires. The objective of the fir

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32

Sedano, Rodolfo Canseco. "Effect of immunoglobulins on early bovine embryo development in vitro." Thesis, Virginia Tech, 1985. http://hdl.handle.net/10919/41575.

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Bovine morulae (day 6: n=257) were obtained to evaluate the [effect of immunoglobulins (Ig) on early bovine embryo development in vitro. Fifty-four cows superovulations were conducted in 36 cows with follicle stimulating hormone. Embryos were collected by non-surgical procedures and morphologically evaluated and randomly assigned to culture. Embryos were cultured in Ham's F-10 containing 10% (6.4 mg/ml) steer serum (SS), 1% (.64 mg/ml) bovine gamma . globulins (GG), 1% (.64 mg/ml) bovine IgG, 1% (.64 mg/ml) bovine 1gM, 10% SS plus 1% GG, 10% SS plus 1% 1gG, or 10% SS plus 1% 1gM. Emb

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33

Nelson, John Stephen. "Fixed-time insemination of porcine luteinizing hormone-treated superovulated beef cows and the resynchronization of beef cows for fixed-time embryo transfer." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-3239.

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34

Bourguet, Cécile. "Stress pendant la période d'abattage chez les bovins : rôles de la réactivité émotionnelle et des facteurs environnementaux." Thesis, Clermont-Ferrand 2, 2010. http://www.theses.fr/2010CLF22079/document.

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La période d’abattage est complexe car elle se compose d’une succession de situations associées à une multitude de facteurs de stress. L’animal est généralement privé d’alimentation et est ensuite confronté à un environnement changeant et contraignant qui demande en permanence des adaptations comportementales et physiologiques affectant son état émotionnel. Les objectifs de cette thèse sont (i) de mieux comprendre l’origine des réactions des bovins au cours de la période d’abattage, et (ii) d’évaluer leur stress d’un point de vue comportemental et physiologique à l’aide d’études menées à la fo

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35

DeDonder, Keith David. "Lung auscultation as a predictor of lung lesions and bovine respiratory disease outcome in feed yard cattle." Thesis, Manhattan, Kan. : Kansas State University, 2008. http://hdl.handle.net/2097/789.

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36

Litton, Leanne Kay. "Effects of flaxseed supplementation and exogenous hormones on finishing performance, carcass characteristics, and plasma and longissimus muscle fatty acid profiles in finishing cattle." Thesis, Kansas State University, 2011. http://hdl.handle.net/2097/8757.

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Master of Science<br>Department of Animal Sciences and Industry<br>James S. Drouillard<br>Christopher D. Reinhardt<br>The effects of supplementing forms of flaxseed on plasma and longissimus muscle (LM) fatty acid (FA) composition, finishing performance, and carcass characteristics were evaluated in five studies. In study 1, steers were fed diets with soy oil (SO), ground flaxseed (Flaxseed), or urea formaldehyde condensation polymer treated flaxseed (UFCP). In study 2, steers were fed diets with SO, linseed oil (LO), or a combination of flaxseed and field peas that was extruded (LinPro). Feed

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37

Morey, Scott D. "Novel approaches to diagnosis and prevention of bovine fatty liver." Thesis, Kansas State University, 2010. http://hdl.handle.net/2097/4640.

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Master of Science<br>Department of Animal Sciences and Industry<br>Barry J. Bradford<br>The prevalence of fatty liver in transition dairy cattle has been reported to be as high as 50%. There are a few reliable on-farm diagnostic tools and even fewer methods to effectively prevent fatty liver. Non-alcoholic steatohepatitis, an advanced form of non-alcoholic fatty liver in humans, is accurately diagnosed with a commercial blood test that detects plasma cytokeratin-18 (CK18) fragments released during hepatocyte apoptosis. A study was performed using 89 Holstein cows in early lactation to determin

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38

Gibson, Troy John. "Electroencephalographic responses of calves to the noxious sensory input of slaughter by ventral neck incision and its modulation with non-penetrative captive bolt stunning : a thesis presented in partial fulfilment of the requirements of the degree of Doctor of Philosophy in Physiology, Massey University, Palmerston North, New Zealand." Massey University, 2009. http://hdl.handle.net/10179/1010.

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Slaughter by ventral neck incision (VNI) is performed on some animals without prior stunning in New Zealand and other countries. A single incision with a razor sharp blade is made in the ventral aspect of the neck, sectioning both carotid arteries and jugular veins, though, not the vertebral arteries. There are a number of potential welfare concerns surrounding slaughter by VNI including pain due to the incision, which may lead to distress during the time before loss of consciousness. The aims of this thesis were to identify cortical responses indicative of noxious stimulation due to slaughter

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39

Lupinacci, Adriano Vecchiatti. "Reservas orgânicas, índice de área foliar e produção de forragem em Brachiaria brizantha cv. Marandu submetida a intensidades de pastejo por bovinos de corte." Universidade de São Paulo, 2002. http://www.teses.usp.br/teses/disponiveis/11/11139/tde-27082002-135702/.

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As áreas de pastagens no Brasil ocupam cerca de 180 milhões de hectares, que são responsáveis por cerca de 90% da carne bovina produzida no país. No entanto, em torno de 80% das pastagens cultivadas apresentam algum grau de degradação, sendo este apontado como o maior problema relacionado com a sustentabilidade da produção animal em pastagens. Uma das principais razões para esse fato está relacionada a erros grosseiros no manejo das pastagens, conseqüência do desconhecimento dos limites ecofisiológicos e de resistência ao pastejo das plantas forrageiras. Dentro desse contexto, o objetivo deste

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40

Lesage, Audrey. "Rôles de FOXL2 dans la physiologie endométriale chez les bovins." Thesis, Université Paris-Saclay (ComUE), 2017. http://www.theses.fr/2017SACLS422/document.

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L'implantation est une étape cruciale de la gestation et du développement post-natal chez les mammifères. L'implantation est définie comme l'établissement d'interactions cellulaires et permanentes entre un endomètre réceptif et un embryon compétent et synchronisé. L'endomètre est un capteur (sensor) biologique de qualité embryonnaire qui conduit la trajectoire de développement du conceptus jusqu'à terme. Les données préalables de notre équipe et d'autres ont suggéré que FOXL2 - un facteur de transcription clé pour l'établissement et le maintien de la fonction ovarienne – pourrait avoir des rôl

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41

Diaza, Angela Maria Gonella. "Effect of Peri-Ovulatory Endocrine Milieu in the Oviductal Physiology of Beef Cows: Regulation of the Transcriptome, Tissue Morphology, Cell Proliferation, Extracellular Matrix Remodeling, microRNAs Abundance Profile, and Oviductal Fluid Composition." Universidade de São Paulo, 2017. http://www.teses.usp.br/teses/disponiveis/10/10131/tde-02082017-152246/.

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In cattle, the oviduct plays an important role in the reproductive process. Oviductal secretions characterize the environment where storage and sperm capacitation, fertilization, and early embryo development take place. Because molecular control of bovine oviduct receptivity is poorly understood, this Thesis proposed a model of receptivity based on the manipulation of pre-ovulatory follicle growth (POF) used to study the effects of periovulatory endocrine profile on oviductal physiology. Growth of POF in Nelore cows (Bos indicus) was manipulated to produce two groups: cows with large POF and l

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42

Baldridge, Sarah. "Pharmacokinetics and physiologic effects of xylazine-ketamine-butorphanol administered intramuscularly or in combination with orally administered sodium salicylate on biomarkers of pain in Holstein calves following concurrent castration and dehorning." Thesis, Kansas State University, 2010. http://hdl.handle.net/2097/7035.

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Abstract (sommario):

Master of Science<br>Department of Clinical Sciences<br>Johann F. Coetzee<br>Objective—To determine the pharmacokinetic parameters of xylazine, ketamine, and butorphanol administered IM and sodium salicylate administered PO and to compare their effect on biomarkers of pain and distress following sham (Period 1) and actual (Period 2) castration and dehorning. Animals—40 Holstein bull calves Procedures—Calves weighing 108 to 235 kg received the following treatments prior to sham castration and dehorning (Period 1) and castration and dehorning (Period 2) (n=10 calves/group): (i) 0.9% saline

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43

Agnolin, Carlos Alberto. "Avaliação de óleos essenciais de capim limão, citronela e eucalipto no controle do carrapato." Universidade Federal de Santa Maria, 2012. http://repositorio.ufsm.br/handle/1/4332.

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Abstract (sommario):

This research was aimed at evaluating in vitro and in vivo effects of lemongrass (Cymbopogon flexuosus Stapf.) oil, citronella (Cymbopogon winterianus Jowitt) oil and eucalyptus (Corymbia citriodora) oil on cattle ticks (Rhipicephalus (Boophilus) microplus), each of which corresponds to an essential oil experiment. Negative control group end eight concentrations of lemongrass oil, citronella oil and eucalyptus oil (0.5; 1; 2; 5; 10; 20; 50; 100%), were used on in vitro trials with engorged female ticks. The efficacy control ticks was 0; 20; 39; 99.5; 100; 100; 100; 100 and 100%, for lemongrass

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44

Silva, del Rio Noelia. "Epidemiology, physiology and nutritional management of twinning in Holstein cattle." 2007. http://www.library.wisc.edu/databases/connect/dissertations.html.

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45

Collins, Jonna Erin. "Expression of the Ets family of transcription factors in early bovine and ovine embryo development." Thesis, 2002. http://hdl.handle.net/1957/32048.

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Abstract (sommario):

Maternally-derived transcripts and proteins support early bovine and ovine embryo development until the 8- to 16-cell stage, at which time embryonic transcripts become essential for continued development. One purported mechanism for the switch from maternal to zygotic control of development (maternal to zygotic genome activation; MZGA) is the appearance of transcription factors that activate specific genes in the embryonic genome. Members of the E26 transformation specific (Ets) family are unique transcription factors involved in development, differentiation, and protease regulation. This stu

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46

Gümen, Ahmet. "Studies on the underlying physiology and treatment of anovulatory condition in dairy cattle." 2003. http://www.library.wisc.edu/databases/connect/dissertations.html.

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47

Schreiner, Daniel A. "Effects of tail docking on behavior, physiology and milk quality of dairy cattle." 2001. http://catalog.hathitrust.org/api/volumes/oclc/50082298.html.

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Abstract (sommario):

Thesis (M.S.)--University of Wisconsin--Madison, 2001.<br>Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 58-59).

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48

Hayes, Marianne Kay. "Bovine testicular cells in vitro: establishment of primary cultures and investigations of secretory functions / by Marianne Kay Hayes." Thesis, 1986. http://hdl.handle.net/2440/20634.

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Abstract (sommario):

Includes bibliographical references (leaves 98-128).<br>iv, 128 leaves, [22] leaves of plates : ill. ; 30 cm.<br>Investigates protein secretion by bovine Sertoli cells in culture. Cultures were obtained from bulls at all stages of post natal development and from sexually mature animals.<br>Thesis (Ph.D.) -- University of Adelaide, Dept. of Animal Sciences, 1987

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49

Duncan, Jennifer S. "The role of phosphoenolpyruvate carboxykinase in the periparturient and ketotic dairy cow." Thesis, 1998. http://hdl.handle.net/1957/33674.

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Abstract (sommario):

Although the occurrence of ketosis is a postpartum phenomenon, recent studies have focused on the prepartum period as key in the development of the disorder. Indicators of prepartum energy status, such as depressed dry matter intake (DMI) and elevated plasma non-esterified fatty acid (NEFA) concentrations have been associated with the occurrence of ketosis. The objective of this study was to investigate the role of phosphoenolpyruvate carboxykinase (PEPCK) in the periparturient and ketotic cow. The enzyme PEPCK catalyzes the rate limiting step in gluconeogenesis in hepatocytes. Whereas, in adi

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50

Chamberlin, RaeAnne. "Partial characterization of gelatinases produced by preimplantation porcine, ovine and bovine embryos." Thesis, 1995. http://hdl.handle.net/1957/34890.

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