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Comparison of thermoregulatory mechanisms in heat sensitive and tolerant breeds of Bos taurus cattle
(University of Missouri--Columbia, 2008)
Two Bos taurus breeds with known differences in heat tolerance were tested under controlled conditions to evaluate heat tolerance. Romosinuano (RO) is a tropically adapted breed. Nine Angus (304 [plus or minus] 7 Kg BW; ...
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 fed one of six diets...
Approaches for alleviating toxic effects of aflatoxin in lactating dairy cows and weanling pigs
(University of Missouri--Columbia, 2010)
Aflatoxin (AF) is a mycotoxin found in feed ingredients used in livestock diets including dairy cattle and pigs. Aflatoxin causes reduced performance, liver damage, increased prevalence of infectious disease, and secretion ...
Effects of late gestational copper, zinc, and manganese source and inclusion in beef cattle
(University of Missouri--Columbia, 2019)
A study was conducted to determine the effects of source and inclusion of Cu, Zn, and Mn during late gestation on cow and calf mineral status, fetal growth, and offspring immune function and pre-weaning performance. Cows ...
Systemic effects of mastitis in the dairy cow : identifying mechanisms underlying impaired lactation in non-inflamed glands
(University of Missouri--Columbia, 2020)
Efficient milk production is temporarily compromised during the inflammatory response to lipopolysaccharide (LPS). Generally, the most severe losses are localized to individual mammary glands with overt cases of mastitis. ...
Genetics in practice : applications of quantitative genetics to environment and educational pursuits
(University of Missouri--Columbia, 2018)
in consumption was due to a minimum of about 10-12 genes. Such a high number of genes with little information on architecture makes reliable phenotypic selection difficult. Ultimately, we determined the phenotype was lost in LB animals but about six genes were...
Zinc ion fluxes on the pathway to mammalian sperm fertilization competency
(University of Missouri--Columbia, 2019)
For decades, the role of the divalent ion calcium was the focus of understanding mechanisms leading to sperm fertilization competency and management of semen storage. Little focus has been placed on other divalent ions, ...
Mitigation of summertime boar infertility by evaporative and conductive cooling
(University of Missouri--Columbia, 2018)
[trademark] Temperature Implant, Data Sciences International; St. Paul, MN): one implanted between the peritoneum and the body wall (core temperature); the other sutured between the testicular tunics (testicular temperature). The initial selection for the most effective...
Altering the timing of fixed-time artificial insemination and the interval from progestin withdrawal to prostaglandin F2a administration in estrus synchronization protocols for beef heifers
(University of Missouri--Columbia, 2022)
that failed to express estrus. The proportion of heifers that expressed estrus prior to FTAI (66 h: 62%; 70 h: 67%; 74 h: 71%) was greater when FTAI was performed at 74 h versus 66 h (P < 0.01). Treatments did not differ (P > 0.10) with respect...
The value of in-breeding in the improvement of the domestic animals
(University of Missouri--Columbia, 1917)
In this paper I shall take the stand of a neutral, and all literature and available material of value upon the subject both for and against, will be studied with a view of determining our present knowledge of in-breeding ...
Influence of seasonal environment, top and bottom deck transport, transport duration, and time in lairage on overall pork quality and blood serum cortisol concentrations of market hogs
(University of Missouri--Columbia, 2007)
Objectives of this study were to determine effects of seasonal environment, top and bottom deck transport, transport duration, and time in lairage on overall pork quality and blood serum concentrations of the stress hormone ...
Taxonomic and metagenomic approaches to diet, health, and breeds of ruminants
(University of Missouri--Columbia, 2020)
Ruminant mammals maintain a symbiotic relationship with their gut microbiome, the organisms of which break complex plant matter into metabolites that are absorbed by the host animal for its nutrition. Building on prior ...
Determination of fat percentage using three different methods within marbling scores on beef longissimus muscle
(University of Missouri--Columbia, 2010)
Consumers are concerned with fat consumption from meat products and the ability to determine fat has changed with recent technological advances. The objective of this study was to determine fat percentage within marbling ...
Evaluating progestin-based protocols to control estrous cycles of beef heifers prior to timed artificial insemination
(University of Missouri--Columbia, 2018)
FTAI and STAI following administration of the melengestrol acetate (MGA[copyright]) prostaglandin F[super script 2a] protocol. Experiment 2 (Chapter 2) evaluated FTAI and STAI following administration of the 7d CO-Synch + controlled internal drug...
The relationship between mitochondria and residual feed intake in feedlot cattle
(University of Missouri--Columbia, 2006)
Residual feed intake (RFI) is a measure of feed efficiency that is not related to an animal's growth rate or body size. Little is known about the factors that affect RFI because, until recently, the measurement of RFI in ...
Reduced autophagy contributes to inefficient DNA damage repair in mouse oocytes
(University of Missouri--Columbia, 2022)
The DNA damage is a major problem that, in somatic cells, leads to mutagenesis and premature aging. However, this is not the case in fully differentiated germ cells. Why DNA damage repair (DDR) machinery is not robust in ...
Using metabolic and biochemical characteristics of postmortem muscle to investigate the interconnectedness of beef color, flavor, and tenderness
(University of Missouri--Columbia, 2021)
Understanding relationships between beef palatability and quality components are crucial for continued production of high quality and consistent beef products. Myoglobin concentrations at 48 and 336 h resulted in moderate, ...
Extracellular vesicles : novel mediators of conceptus-maternal interactions in sheep
(University of Missouri--Columbia, 2018)
indicating a role in intercellular communication during the establishment of pregnancy; (4) uterine EV content increases more than five-fold from day 10 to 14 of the estrous cycle; (5) the endometrial epithelia produce EVs with multivesicular endosomes...
An analysis of aspartic peptidases expressed by trophoblasts and placenta of even-toed ungulates
(University of Missouri--Columbia, 2008)
The Pregnancy Associated Glycoproteins (PAGs) represent a multigene family of trophoblast expressed proteins, found exclusively in the placenta of even-toed mammals such as ruminants (cattle, sheep), pig, etc. In ruminants, ...
Identification and quantification of differentally represented transcripts in preimplantation bovine embryos
(University of Missouri--Columbia, 2007)
Identification of transcripts present at key development stages in preimplantation embryos is critical for a better understanding of early embryogenesis. To that end, we characterized the relative abundance of multiple ...