Browsing Graduate School - MU Theses and Dissertations (MU) by Thesis Department "Animal sciences (MU)"
Now showing items 61-80 of 275
-
Differential gene and protein expression in pig nuclear transfer extraembryonic membranes and blastocyst stage embryos
(University of Missouri--Columbia, 2010)Nuclear transfer (cloning) is the process of transferring a donor cell nucleus into an enucleated oocyte. The oocyte and donor cell are subsequently fused and activated to allow for nuclear reprogramming and continued ... -
Digestible amino acid requirements for young female turkeys
(University of Missouri--Columbia, 2018)[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Nine experiments were conducted to determine the optimal digestible isoleucine (dIle), valine (dVal), leucine (dLeu), phenylalanine plus tyrosine (dPT) ... -
Digestible lysine and threonine requirements of male turkeys and their effects on performance of male turkeys fed practical diets to market age
(University of Missouri--Columbia, 2008)Seven experiments were conducted to determine the minimum requirements of digestible lysine (dLys) and digestible threonine (dThr) from 1 to 21 weeks of age for male turkeys. Requirement values were similar to NRC (1994) ... -
DNA methylation in the early porcine embryo
(University of Missouri--Columbia, 2007)Reproductive technologies such as in vitro fertilization, intracytoplasmic sperm injection, parthenogenetic activation, and somatic cell nuclear transfer are powerful procedures in the production of animals for agriculture, ... -
Effect of commercial feed additives on production variables and metabolic markers of the periparturient dairy cow
(University of Missouri--Columbia, 2013)Three experiments were conducted to investigate the effects of commercially available feed additives on production variables and metabolic markers when supplemented during the periparturient period. The hypothesis was that ... -
Effect of dry matter intake restriction on energy balance, ruminal fermentation, and nutrient retention by beef steers
(University of Missouri--Columbia, 2005)Two studies were conducted to determine the effects of DMI restriction on digestion and metabolism by feedlot steers. In Trial 1, 12 Angus X steers (BW [almost equal to] 450 [plus or minus] 18 kg) were assigned randomly ... -
The effect of early pregnancy and lactation on the growth of young breeding animals
(University of Missouri--Columbia, 1916)The purpose of the investigation described in this thesis was to determine the effects of early breeding in swine. If breeding immature animals results in evil consequences, these bad results should be observed in one or ... -
Effect of endophyte-infected tall fescue on hepatic gene expression in cattle
(University of Missouri--Columbia, 2013)[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Fescue toxicosis may result from the intake of ergot alkaloids found in endophyteinfected (E+) tall fescue. The liver if the major organ involved in ... -
Effect of high peroxide value fats on performance of broilers in normal and immune challenged states
(University of Missouri--Columbia, 2009)A series of trials were conducted in order to determine the effects of high peroxide value fats on performance of broilers in normal and immune challenged states from 0-49 days of age. In the first experiment, birds were ... -
Effect of ovulatory follicle size on bovine pregnancy associated glycoproteins in beef cattle
(University of Missouri--Columbia, 2010)The GnRH-induced ovulation of small dominant follicles was associated with reduced pregnancy rates and late embryonic/fetal survival around the time of embryo-uterine attachment. PAGs are secreted by binucleated trophoblast ... -
Effect of ovulatory follicle size on luteal function, pregnancy rate, and late embryonic/fetal mortality in beef cattle
(University of Missouri--Columbia, 2009)Previous reports indicate that ovulation of small dominant follicles resulted in reduced pregnancy rates compared ovulation of large follicles in cattle. A reciprocal embryo transfer approach was used to differentiate ... -
Effect of ovulatory follicle size on steroidogenic capacity, molecular markers of oocyte competence and bovine pregnancy associated with glycoproteins in beef cows
(University of Missouri--Columbia, 2011)Artificial insemination (AI) and estrus synchronization (ES) are effective tools for the genetic advancement of cattle. Gonadotropin-releasing hormone (GnRH) is used at the beginning of ES protocols to induce ovulation and ... -
Effect of pre-ovulatory follicle size on oocyte transcript abundance in beef cows
(University of Missouri--Columbia, 2016)Inadequate oocyte competence is a potential explanation for reduced pregnancy rates and(or) increased late embryonic mortality when small dominant follicles are induced to ovulate prematurely with gonadotropin releasing ... -
Effect of preovulatory estradiol and(or) postovulatory progesterone on the establishment of pregnancy in beef cattle
(University of Missouri--Columbia, 2018)Preovulatory secretion of estradiol and postovulatory secretion of progesterone are essential for preparing the uterine environment for pregnancy in cattle. In a previous study, circulating concentrations of preovulatory ... -
Effect of preovulatory follicle size on cumulus cell and follicular wall transcript abundance in beef cows
(University of Missouri--Columbia, 2017)Gonadotropin releasing hormone (GnRH)-induced ovulation of small dominant follicles decreased pregnancy rates and increased late embryonic/fetal mortality in postpartum beef cows, which could be caused by inadequate oocyte ... -
The effect of reduced nocturnal temperatures on the performance of broiler chicks and hen turkey poults from 0 to 21 days of age
(University of Missouri--Columbia, 2018)"The world population has increased over the past century and with this increase in the world population comes an increase in demand of animal protein for consumption. The United States produced 8.78 billion broilers and ... -
Effect of RU486, a progesterone antagonist, on uterine progesterone receptor, embryonic development and ovarian function during early pregnancy in pigs
(University of Missouri--Columbia, 2009)Progesterone (P4) down-regulates the progesterone receptor (PGR) exclusively within the epithelium of the pig uterus near d 8 of the estrous cycle and pregnancy. How P4 down-regulates the PGR is not understood but is ... -
Effect of subclinical endometritis on ovarian and uterine response to a timed AI protocol in dairy cows
(University of Missouri--Columbia, 2016)During parturition the uterus of the dairy cow is more exposed to the environment. Bacteria colonize the uterus causing infection. The immunological response of the cows is able to clear infection, however, around 20% of ... -
The effect of various levels of yellow grease in pre-starter rations on performance of turkey poults
(University of Missouri--Columbia, 2016)Nutritional intervention in the early growing poult can be a valuable strategy to decrease the stress experienced during the transition from endogenous yolk sac lipid reserves to an exogenous feed source. The objective of ... -
Effects of a commercial feed additive on production losses during acute heat stress conditions in mid-lactation Holstein dairy cows
(University of Missouri--Columbia, 2013)Heat stress occurs when the environmental temperature exceeds the thermoneutral zone (or comfort zone) of the dairy cow, necessitating the employment of energetically costly cooling mechanisms such as sweating and panting. ...