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Articles 1 - 10 of 10
Full-Text Articles in Life Sciences
Relationship Of Winter Hair Coat Shedding Ability Of Purebred Angus Dams With Mineral Status, Apparent Forage Digestibility, Uterine Artery Hemodynamics, And Calf Growth And Development, Randy Hunter Burnett
Relationship Of Winter Hair Coat Shedding Ability Of Purebred Angus Dams With Mineral Status, Apparent Forage Digestibility, Uterine Artery Hemodynamics, And Calf Growth And Development, Randy Hunter Burnett
Theses and Dissertations
Winter hair coat shedding ability in southern U.S. cattle production has previously been associated with differences in adjusted birth and weaning weights of calves from dams that shed by June or later (Gray et al., 2011; Cauble et al., 2019). This study was developed to research possible avenues of why these relationships exist with winter hair coat shedding ability. The primary objectives of the following experiments were to: 1) evaluate how mineral status relates to winter hair coat shedding ability, 2) evaluate how winter hair coat shedding ability relates to apparent digestibility of forage, 3) evaluate winter hair coat shedding …
The Art Of Amphibian Conservation: Linking In-Situ And Ex-Situ Populations Of Endangered Species Through Genome Banking, Isabella Joann Burger
The Art Of Amphibian Conservation: Linking In-Situ And Ex-Situ Populations Of Endangered Species Through Genome Banking, Isabella Joann Burger
Theses and Dissertations
Limited breeding success in captive breeding programs has necessitated the development of assisted reproductive technologies (ART) to preserve and increase genetic variation and population numbers of both captive and wild amphibian groups. ART has been shown to be successful in numerous anuran species, and current studies focus on the application of ART in ex-situ populations. The focus of this project is to show that linking in-situ and ex-situ amphibian populations through sperm cryopreservation, genome banking, and in-vitro fertilization is possible, with the goal of increasing gene diversity throughout groups in order to produce self-sustaining, wild populations in the future. Specific …
The Effect Of Bovine Endometrial Cell Conditioned Media On In Vitro Produced Bovine Embryo Development And Gene Expression, Mary A. Oliver
The Effect Of Bovine Endometrial Cell Conditioned Media On In Vitro Produced Bovine Embryo Development And Gene Expression, Mary A. Oliver
Masters Theses
In vitro produced (IVP) bovine embryos provide enhanced genetic value and a means for studying early embryonic development. However, IVP embryos are developmentally compromised and are lower quality compared to in vivo derived (IVD) embryos. Consequently, after transfer pregnancy rates from IVP embryos are consistently lower, as they exhibit the highest amounts of pregnancy failure during the early embryonic phase (prior to day 28). Progesterone (P4) has been shown to influence bovine endometrial epithelial (EPI) and stromal fibroblast (SF) cells to secrete developmentally important molecules that promote early embryo development and conceptus elongation. However, IVP embryos are not exposed to …
21°C Is The Emerging Ideal Temperature For Kidney Preservation In The Presence Of Hydrogen Sulfide, Smriti Juriasingani
21°C Is The Emerging Ideal Temperature For Kidney Preservation In The Presence Of Hydrogen Sulfide, Smriti Juriasingani
Electronic Thesis and Dissertation Repository
Kidney transplantation is the treatment of choice for patients with end-stage kidney disease. However, the shortage of transplantable kidneys has led to ever-increasing waiting lists. As a result, kidneys obtained via donation after cardiac death (DCD) are being used more frequently for transplantation. However, they exhibit poorer outcomes due to ischemia-reperfusion injury (IRI) and cold preservation methods, such as static cold storage (SCS). Supplementing cold preservation solutions with hydrogen sulfide donors, such as AP39, has been shown to improve renal IRI and graft outcomes, but the injury associated with cold preservation remains. This thesis evaluates the effect of subnormothermic kidney …
Synthetic Viral Pyrogen Induces Behavioral Fever In Plethodon Glutinosus Salamanders, Nicholas Britt
Synthetic Viral Pyrogen Induces Behavioral Fever In Plethodon Glutinosus Salamanders, Nicholas Britt
Undergraduate Honors Theses
Behavioral fever is an essential coping mechanism across ectothermic phyla to aid in combating pathogenic threats. Ectotherms lack internal temperature regulation associated with fever in endotherms; thus, ectotherms can exhibit a behavioral fever response when immunocompromised to thermoregulate by moving to warmer locations. The salamander order Caudata, tend to be keystone species in their resident ecosystems through their role as secondary consumers of invertebrates to maintain the food chain. With growing interest about ecology and conservation of salamanders as species diversity declines, this study was designed to determine if salamanders use their environment to take advantage of behavioral fever. The …
The Relationship Between Sleep Duration And Optimism Levels In Generation Z Students, Anna Hassett
The Relationship Between Sleep Duration And Optimism Levels In Generation Z Students, Anna Hassett
Honors College Theses
Generation Z is getting less sleep than ever and in conjunction, the quality of Generation Z’s sleep is decreasing. Inadequate sleep can increase the risk of depression, cardiovascular diseases, obesity, and cognitive decline. Optimism is a subjective measure of worldview. In the field of positive psychology, optimism is believed to improve overall psychological and physical health. The main purpose of the present study is to examine the relationship between sleep duration and reported levels of optimism in Generation Z students, aged 17 to 24. The hypothesis for this study is that optimism and duration of sleep will have a significantly …
Resolving Variability In Size Structure In An Individual-Based Model For The North Pacific Krill, Euphausia Pacifica, Roxanne Robertson
Resolving Variability In Size Structure In An Individual-Based Model For The North Pacific Krill, Euphausia Pacifica, Roxanne Robertson
Cal Poly Humboldt theses and projects
Individual-based models (IBMs) have emerged as a powerful tool for ecological research and are particularly well suited to studies of plankton ecology. In this thesis, I develop an IBM for the North Pacific krill, Euphausia pacifica, with the goal of replicating observed variability in size-structure in the northern California Current Ecosystem. Krill, and E. pacifica in particular, are central to the structure and function of the California Current Ecosystem. Their response to environmental forcing translates climate variability to higher trophic levels and underpins broader ecosystem responses. Recent observations indicate environmental and climate-related shifts in E. pacifica size distributions, which …
Cold-Induced Metabolic Changes In Lean, Nag-1 Transgenic Mice, Rachel J. Davey
Cold-Induced Metabolic Changes In Lean, Nag-1 Transgenic Mice, Rachel J. Davey
All Master's Theses
Obesity is a multifaceted metabolic disorder with severe worldwide public health consequences. While obesity can often be treated using diet and exercise, there are complex genetic interactions driving obesity that don’t always respond to such changes. One important research focus for addressing genetic factors is activating brown adipose tissue which increases thermogenesis, the process of burning stored fats to generate heat. Cold exposure is a known way to activate brown adipose tissue through b3-adrenergic signaling. This signaling pathway causes an upregulation of thermogenesis in brown adipocytes and beige adipocytes, which is white adipose tissue that “browns” and becomes metabolically active. …
A Computational Model Relating Tissue Oxygen Consumption To Oxygen Delivery In A Krogh Cylinder Model Of Skeletal Muscle, Raghad A. Alqahtani
A Computational Model Relating Tissue Oxygen Consumption To Oxygen Delivery In A Krogh Cylinder Model Of Skeletal Muscle, Raghad A. Alqahtani
Theses and Dissertations
Oxygen transport from a capillary to skeletal muscle tissue is a complex process that involves convective and diffusive mechanisms to deliver adequate oxygen to meet tissue metabolic activities. Typically, oxygen uptake in tissue is set by oxygen demand, which is set by metabolic activity. The relationship between the oxygen consumption (VO2) of an isolated perfused tissue and the rate of delivery of oxygen (QO2) to the tissue has been a subject of interest to many investigators over the past century. Experiments have shown that there is a critical value of QO2 below which tissue VO …
Lipid Metabolites As Energy Stores In Four Stingray Species, Lauren Moniz
Lipid Metabolites As Energy Stores In Four Stingray Species, Lauren Moniz
Electronic Theses and Dissertations
Assessing macronutrient transfer is important for estimating ecosystem health and structure. This nutrient transfer is facilitated through trophic position interactions and the consumption of biomass. Lipids are macronutrients that can be used to assess energy flow. Triglyceride (TAG) and free fatty acids (FFA) are important lipids that are obtained from diet and integrate into tissues. They are representative of energy stores and potential energy available for metabolic processes. In marine ecosystems, stingrays occupy the mesopredator niche, facilitating nutrient transfer from lower to higher trophic positions. Stingrays consume a variety of prey items ranging in lipid content, but how lipid metabolites …