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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)
to determine if birds benefit from periods of warmer and cooler environmental temperatures during different parts of the day (Waibel and Macleod, 1994). One management strategy that has not been researched in poultry, but has been studied in the swine model...
Role of preovulatory estradiol in uterine and luteal function
(University of Missouri--Columbia, 2018)
in estrus (Richardson et al., 2016). We hypothesized that increased preovulatory concentrations of estradiol would enhance conceptus elongation in beef heifers. To test the preceding hypothesis conceptus elongation on day 16 (day 0 = GnRH-induced ovulation...
Influence of subclinical hypocalcemia on plasma biochemical parameters, liver histologic changes, and common postpartum diseases in dairy cows
(University of Missouri--Columbia, 2011)
Holstein cows were assigned to one of two groups 1) normocalcemic (n=49; ionized calcium [iCa] ! 1.0 mmol/L) or 2) hypocalcemic (n=51; [iCa] [less than 1.0 mmol/L) based on whole blood [iCa] on the day of calving. Blood samples were collected from all cows...
Developmental exposure to bisphenol a (BPA) and ethinyl estradiol (EE) and effects on F1 parental care and F2 pup parameters in California mice (Peromyscus californicus)
(University of Missouri--Columbia, 2017)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Environmental exposure during the perinatal period can promote health and disease in offspring, otherwise coined developmental origins of health and disease (DOHaD). Endocrine...
Effects of conjugated linoleic acid on tissue lipid composition and bone remodeling in an ovariectomized aged rat model
(University of Missouri--Columbia, 2012)
not be enough CLA for this enhanced anti-inflammatory response. In conclusion, the geriatric postmenopausal model that we created may be beneficial in future osteoporosis research....
Phenotypic and genetic effects of disposition on beef tenderness and quality attributes
(University of Missouri--Columbia, 2011)
Cattle temperament (exit velocity; EV) and steak tenderness (Warner-Bratzler shear force) have been shown to be associated in Bos indicus cattle (Behrends et al., 2009). Both traits potentially provide opportunities for improvement among beef herds...
Effects of heat stress on leukocyte function and gene expression in lactating dairy cows
(University of Missouri--Columbia, 2018)
, behavior, and health lead to greater costs for producers and decreased welfare for animals. In terms of health, the current literature does not provide conclusive evidence of the effects of heat stress on the immune system of dairy cows. To elucidate a...
Effects of Artemisia afra and Artemisia absinthium on fertility of male mice exposed to increased ambient temperatures for 24 hours
(University of Missouri--Columbia, 2010)
Males exposed to elevated temperatures display a decrease in reproductive performance resulting in decreased profit for producers. The use of herbs to alleviate the effects of heat in tropical countries has been documented ...
Evaluation and development of early pregnancy diagnosis in dairy cattle
(University of Missouri--Columbia, 2018)
Early chemical pregnancy tests for use in dairy cattle are necessary to aid in reducing the costs associated with days the animal is not pregnant. Identifying non-pregnant dairy cattle sooner would allow for efficient treatments and improve decision...
Factors affecting neonatal and peripartum maternal metabolism and behavior in beef cattle and horses
(University of Missouri--Columbia, 2018)
to parturition in beef cattle, and the effect of parity on those behavioral changes. Changes in activity were detected during the 3 d prior to calving, with some parameters affected by parity. Lying bouts increased on the day prior to calving...
Effects of heat stress and fescue toxicosis on the immune system and other physiological parameters
(University of Missouri--Columbia, 2010)
. This research identified adaptive responses to fescue toxicosis that highlighted shifts in immune function....
Heritable, differential gene expression in pre-implantation embryos from rats with endometriosis and their daughters
(University of Missouri--Columbia, 2010)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT REQUEST OF AUTHOR.] Endometriosis, which affects millions of women, is a condition where the uterine lining grows outside of the uterus and is associated with subfertility ...
Extracellular vesicles : novel mediators of conceptus-maternal interactions in sheep
(University of Missouri--Columbia, 2018)
[ACCESS RESTRICTED TO THE UNIVERSITY OF MISSOURI AT AUTHOR'S REQUEST.] Infertility and pregnancy loss are common problems affecting reproductive efficiency, health and development in livestock. Pregnancy loss occurs most commonly during the first...
Digestible amino acid requirements for young female turkeys
(University of Missouri--Columbia, 2018)
.94% of dPT. These findings are lower than those preconized by NRC (1994) and agreed with previous researches evaluating digestible amino acids in turkey nutrition, which had overestimated by NRC (1994). Conclusions from these studies are turkeys has lower...
Approaches for alleviating toxic effects of aflatoxin in lactating dairy cows and weanling pigs
(University of Missouri--Columbia, 2010)
aflatoxin M1 (AFM1) into milk. Aflatoxin M1 is toxic and carcinogenic, and is of great concern with respect to human health because of the high consumption of milk and milk products by humans, especially children. Due to the involvement of AF in disease...
Uterine regulation of preimplantation embryo development in fertility-classified heifers
(University of Missouri--Columbia, 2018)
, serial embryo transfer (3-4 rounds) was used to classify heifers based on pregnancy success on day 28 as high fertile (HF; 100%), subfertile (SF; 25%), or infertile (IF; 0%). Next, a series of experiments were conducted using the fertility...
Alleviation of heat stress with Tasco in dairy cows
(University of Missouri--Columbia, 2010)
The present study determined the impact of Tasco, Ascophyllum nodosum, on heat stress in dairy cows. Thirty-two Holstein cows were utilized in a randomized complete block design, during 63 days in summer 2008. Feed intake, milk production...
Differential gene and protein expression in pig nuclear transfer extraembryonic membranes and blastocyst stage embryos
(University of Missouri--Columbia, 2010)
objective was to determine the cloning efficiency in pigs between three activation methods. The second objective was to determine the effects of nuclear transfer on gene expression of blastocyst stage embryos and day 30 placentas and compare that to normal...
Development and analysis of a FOXA2 conditional overexpression mouse model
(University of Missouri--Columbia, 2018)
expression. Chapter 2, the research chapter, shows that we developed a mouse model which could express FOXA2 continuously only in the cells with expression of Cre recombinase. By applying two different mouse strains with special Cre expression, we found...
Effect of ovulatory follicle size on bovine pregnancy associated glycoproteins in beef cattle
(University of Missouri--Columbia, 2010)
following GnRH-induced ovulation of 14 to 15 mm compared to 12 to 13 mm follicles. The first increase in bPAG occurred on d 24. There was an effect of day on bPAG but no effect of ovulatory follicle size or ovulatory follicle size by day interaction from d...