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Correlation Of Finite Element Prediction And Experimental Measurements Of Aircraft Panel Structural Vibration, Olaf L. Storaasli

Mechanical & Aerospace Engineering Theses & Dissertations

With the rapid development of computational capabilities and the implementation of complex tools for commercial finite element programs, predicting structural dynamics and related acoustics of complex structures is presently achievable. Structural finite element modeling is a design tool widely utilized for analysis of problems of all kinds. However, high frequency vibration of complex structures, such as the reinforced aircraft panel used for this study, currently does not correlate well with experimental measurements using conventional modeling methods. An investigation into the commonly used modeling techniques as well as the new tools of commercial finite element analysis packages for the prediction of …

The Cellular And Molecular Dynamics Of The Queuosine Modification In Transfer Rna: Definition, Modulation, Deficiencies And Effect Of The Queuosine Modification System, Rana C. Morris

Theses and Dissertations in Biomedical Sciences

The presence of the queuosine modification in the wobble position of tRNA^asn, tRN^asp, tRNA^his, and tRNA^tyr is associated with a decrease in cellular growth rate, an increase in the ability to withstand environmental stress, and differentiation of pleuripotent cells into mature phenotypes. The loss of this normal modification is strongly correlated with neoplastic transformation and tumor progression of a wide variety of cancers.

The "normal" system for formation of the queuosine modification in tRNA was studied in human fibroblast cell cultures and in mouse, rat and human liver tissues. The queuosine modification system …

The Effects Of Estrogen On Dorsal Root Ganglion Neurons, Sheila A. Scoville

Theses and Dissertations in Biomedical Sciences

Skin sensation is mediated by dorsal root ganglion (DRG) neurons. Data indicates that skin sensitivity in female rats is estrogen-dependent. Some DRG neurons have estrogen receptors (ERs) which are regulated by estrogen. In these cells, nerve growth factor (NGF) and estrogen receptors colocalize. Regulation of NGF receptors and neuronal sensitivity to NGF may allow estrogen to regulate NGF-dependent genes. The goals of the present study were to determine which DRG neurons express the ER gene and to analyze the effects of long-term estrogen administration on the interrelated expression of tyrosine kinase A (trkA), preprotachykinin (PPT), and 68kD neurofilament (NF) genes …

Understanding Bull Breeding Soundness Exams, Clell Bagley, Craig Burrell

All Current Publications

Controversy still exists about Breeding Soundness Examinations (BSE) and what they can and cannot do. At times they are not used because of a lack of understanding of their value while at other times they are used with unrealistic expectations. First, BSE is performed to identify bulls with reduced fertility not just to find those which are sterile. Very few bulls are sterile but a significant percent have reduced fertility.

Preventing Calf Losses, Clell Bagley

All Current Publications

Many beef producers and practicing veterinarians noted there were higher than normal calf death losses during the 1993 calving season. We were especially aware of the increased losses here in the western states, but there were also heavy losses in the midwest and east, so the problem was very widespread.

Clinical Trials With Copper Supplementation, Clell Bagley, Norris Stenquist, Dennis Worwood

All Current Publications

Copper deficiency has been diagnosed in beef cattle herds in many areas of the intermountain west. Copper supplements are not widely used, even though several products are available. It is difficult to correct a deficiency because too much copper can result in copper toxicity or poisoning. Toxicity is less a hazard with cattle than with sheep, but it is still a problem to guard against. Periodic monitoring of the herd’s copper status is essential for proper supplementation.

Toxic Contaminants In Harvested Forage, Clell Bagley

All Current Publications

Harvested forages are vitally important and commonly used for beef production. But contamination can occur which results in reduced forage quality and palatability or may even result in animal illness and death. Outlined below are some of the common problems that should be considered.

Updating Your Herd Health Plan, Clell Bagley

All Current Publications

Animal health is not sold in a bottle, syringe or sack. It comes as a result of proper management. The increased concentration and movement of cattle and demands for greater production necessitate an improved level of management to maintain cattle health.

Mycotoxins, Clell Bagley

All Current Publications

Certain metabolites of some fungi (molds) are poisonous (toxic). Fungal poisons have been known for many years, but they were not considered a major factor in animal disease until fairly recently. Because the prefix myco- refers to fungi, these toxins are termed mycotoxins. Penicillin is derived from a fungus and could be termed a mycotoxin, in relation to bacteria which are sensitive to it.

Pinkeye, Clell Bagley

All Current Publications

Pinkeye is the common term for Infectious Bovine Keratoconjunctivitis (IBK). This terminology describes a disease condition of cattle which is infectious in nature and causes an inflammation of the transparent cornea, the sclera (“white”) of the eyeball and the conjunctiva (inside lining membrane) of the lids.

Vaccinating To Prevent Pneumonia, Clell Bagley, Donald Snyder, Nyle Matthews

All Current Publications

Bovine Respiratory Disease (BRD) is a major problem for cattle and it continues to cause serious economic losses. Pneumonia is its most serious form. BRD causes increased death losses, higher medication and labor costs, and lost production. It occurs most commonly within a few weeks of weaning and is especially troublesome then. BRD is more serious in calves which are shipped long distances right after weaning and is often referred to as shipping fever.

Weaning Calves Successfully, Clell Bagley

All Current Publications

The production loss and death loss of calves at weaning is second only to the losses at calving. Weaning is a very stressful time and bovine respiratory disease (pneumonia, shipping fever, etc.) is a common problem. Coccidiosis and other digestive problems, such as acidosis, (grain overload) are also common.

Yew Had Better Watch Out!, Clell Bagley, Kip Panter

All Current Publications

If you see clippings from ornamental, evergreen shrubs that someone has dumped where cattle, horses, sheep, etc., can eat them, you had better move the plants or the animals. If you don’t, expect some dead animals.

Controlling Coliform Mastitis, Clell Bagley

All Current Publications

Coliform mastitis is usually considered as an acute disease although some milder forms and even chronic cases do occur. It is caused by the bacterial organism Escherichia coli, hence the name, coliform. Other, related organisms, Enterobacter aerogenes and Klebsiella pneumoniae, are also often called “coliforms.”

Staph Mastitis: Herd Control Program, Clell Bagley

All Current Publications

Mastitis caused by Staphylococcus aureus is a major problem for some dairy herds. It causes high Somatic Cell Counts (SCC), reduces milk quality, and may cause a loss of milk market. It limits milk production for the herd, reduces efficiency, and continues to spread to other cows.

Drug Residues And Food Safety, Clell Bagley

All Current Publications

Complaints and demands from consumers concerning a product usually occur after an incident involving injury, illness or death. However, this was not the case with the Alar scare with apples and it is not the case with the concern for drug residues in food animal products.

Cat Plague - Veterinarian Caution, Clell Bagley

All Current Publications

Plague has been in the news from several areas in the much from world. The Center for Disease Control has become especially concerned about two aspects of plague (and these concerns affect veterinarians in Utah very directly); first, plague has been increasing in recent years in the western states and second, cats are being recognized more often as being associated with human plague cases.

Improving Reproductive Performance Of The Ewe, Clell Bagley

All Current Publications

The western range ewe is a tremendously productive animal as evidenced by the excellent reproductive rates that are achieved by some producers, some years. Yet many other factors such as weather, disease and forage availability can drastically reduce their productivity. It is a major management challenge to control or even minimize the effect of these interacting factors. Some of those of greatest priority are listed and briefly discussed.

Internal Parasites, Clell Bagley

All Current Publications

Internal parasites and how they affect animals.

Obstetrics And Lambing Problems, Clell Bagley

All Current Publications

Lambing season is a busy time and a critical step toward a productive year. The first rule is for frequent observation of ewes due to lamb. Extra help during this season will usually more than pay for the cost because of extra lambs saved.

Epididymitis In Range And Purebred Rams, Clell Bagley, Mark Healey

All Current Publications

Fact sheet describes epididimitis, its causes, its effects, and control of the disease.

Udder Diseases Of Sheep, Clell Bagley

All Current Publications

There are two major udder disease problems of ewes, hardbag and bluebag. They both tend to occur sporadically and are frustrating for producers to treat or prevent.

Ammonia Toxicity In A Herd Of Beef Cattle, Clell Bagley

All Current Publications

A Utah producer lost 22 out of 50 head of cows in May, due to ammonia toxicity. He used a liquid fertilizer tank to haul water to the cattle. He had done this for two years previously, and with washing out thoroughly, there had been no problem. But this time some fertilizer was evidently left in, mixed with the water and resulted in the toxicosis.

Beef Quality Assurance Notes, Clell Bagley

All Current Publications

Most of us have felt that injections given to a calf early in its life would be of little problem by the time it went to slaughter. We were WRONG!!! Colorado State University has provided the data and the pictures to prove it. In fact, 90% of the lesions found at slaughter originated during the cow-calf, stocker or early feeding periods. And, injections given while the calf is young caused greater lesions than those given when it was older. The study followed calves injected at branding or weaning and found a high incidence of lesions and blemishes when they went …

Preparing Bulls For The Breeding Season, Clell Bagley

All Current Publications

With proper care prior to and during the breeding season, cattlemen can increase the breeding capacity of bulls. Breeding soundness evaluations and trichomoniasis testing are tools which can aid a herd manager as he makes critical decisions for next year’s calf crop.

Assisting With Calving, Clell Bagley

All Current Publications

Calving season is a busy time of year for cattlemen and it is a critical step toward a productive year. The first rule is frequent observation of those cows due to calve, especially the first calf heifers. This is usually a very busy time of year and some extra help during this season will more than pay for the cost through extra calves saved. Even wives and older children can help a solo producer get some needed sleep. If, they have been taught how to observe, they can tell when a calving cow needs help and if there’s a need …

Copper Deficiency In Utah, Clell Bagley, Norris Stenquist, Dennis Worwood

All Current Publications

Copper deficiency has been diagnosed in a number of Utah cattle herds, yet few producers use copper supplements. Cattle deficient in the element can suffer significant production losses. Producers need to balance both the effects and the costs of copper supplements. Too much copper can cause copper toxicity or poisoning. And adding copper may not be economical if animals are only marginally deficient. Further, the deficiency may occur only on specific feeds or pastures, correcting itself when cattle are moved.

Dealing With Drought And Short Feed Supplies For Beef Cattle, Clell Bagley

All Current Publications

Weather patterns greatly impact feed supplies for almost all areas of Utah. Both grazing and harvested feed supplies are usually reduced with drought conditions. The hay QUALITY may actually be improved because of the excellent drying conditions for harvest. Taking good care of hay supplies to protect that quality may allow use of less feed in the winter to achieve acceptable results.

Halogeton Toxicity In Cattle, Clell Bagley

All Current Publications

“Everyone” knows that halogeton is toxic to sheep, but sometimes we forget that it is also toxic for cattle. If cattle eat enough of it, it will kill them. One autumn incident resulted in the death of over 40 head of cows in a multiple owner grazing herd.

Health Programs Which Improve The Marketability Of Calves, Clell Bagley

All Current Publications

The “winds of change” have the potential to drastically change the marketing of beef calves in the next few years. Economic pressures may force greater conformity in the way cow-calf producers manage and prepare their calves for market. Those who are slow to conform may be at a disadvantage for marketing.