Digital Commons Network^™

Management For Weaning Healthy, Marketable Calves, Clell Bagley

All Current Publications

Weaning is an extremely stressful time for beef calves and involves the potential for severe economic loss. The most common problems usually involve respiratory and/or digestive diseases. Weaned calves should be retained for 3–6 weeks after weaning.

Mastitis Prevention Program, Clell Bagley

All Current Publications

A great deal of money and effort have been expended over the years to find methods for control of mastitis in dairy cows. Both European and U.S. workers have developed programs of prevention that are very similar. These preventive programs require implementation of the seven basic procedures outlined below. It has been shown repeatedly that this programs works.

Drug Use In Food Animals, Clell Bagley

All Current Publications

Producers should be aware that there are four ways to legally obtain and use antibiotics and other drugs in food animals. The first, and most common source, is over the counter (OTC) drugs, labeled for specific uses.

Summary Of Diseases Of Range Sheep, Clell Bagley

All Current Publications

No abstract provided.

External Parasites, Clell Bagley

All Current Publications

No abstract provided.

Tube A Lamb, Save A Life, Clell Bagley

All Current Publications

No abstract provided.

Dystocia (Difficult Lambing), Clell Bagley

All Current Publications

If the flock is lambed on the range, assistance is not given to individual ewes. Catching those needing help causes so much disruption of ewes with normal lambs and results in so many orphans, it is detrimental. One of the primary advantages of shed lambing a range flock is being able to better assist during birth and those first crucial hours of life.

Breeding Soundness In Rams: How To Do It..., Clell Bagley

All Current Publications

In order for ram breeding soundness examinations to be of maximum value to producers they must be relatively thorough as well as consistent. There is so much normal variation between rams that we cannot afford to add additional variability by lack of observation or inconsistent techniques.

The Campbell Lawyer, Volume 9, Number 2

Alumni Newsletters

No abstract provided.

Effect Of Cocaine On Rabbit Renin Angiotensin System: Cocaine Detection In Adult And Fetal Tissue And Adult Plasma Using Ion Mobility Spectrometry, Barbara Belinda Guinn

Biological Sciences Theses & Dissertations

Ion mobility spectrometry (IMS) was used to detect cocaine and/or the metabolite ecgonine methyl ester (EME) in tissue and plasma samples from male, maternal, and fetal New Zealand White (NZW) rabbits. EME was consistently detected in all adult plasma samples 5 minutes after the injection of cocaine hydrochloride (cocaine•HCI, 2 mg/kg). EME was also in the liver, kidneys, testicles, and ovaries. Five minutes after the injection of cocaine•HCI, the male arterial pressure (MAP) increased from a mean control value of 79 ± 3.2 mmHg to 88 ± 4.1 mmHg, and the pCO₂ increased from a control value of28 ± …

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 Detoxification Of Petroleum Contaminated Coastal Plain Sandy Soil Using An Amended Vermicomposting Approach, John Charles Kraemer

Health Services Research Dissertations

This study explores the feasibility of utilizing an amended vermicomposting treatment approach for detoxifying petroleum hydrocarbon contaminated sandy soil. The bench-scale testing of gasoline and diesel contaminated soil using three test soil vessels and one control soil vessel was performed in a laboratory setting for a six week time period. The control soil received no treatment other than distilled water to maintain soil moisture. Treatment 1 consisted of direct application of liquid municipal biologic sludge on a weekly basis. Treatment 2 consisted of the addition of 30 Eisenia foetida earthworms and distilled water. Treatment 3 consisted of direct application of …

Ecological Relationships Between The Marsh Rice Rat (Oryzomys Palustris) And The Meadow Vole (Microtus Pennsylvanicus) In Two Virginia Tidal Marshes, Christopher P. Bloch

Biological Sciences Theses & Dissertations

Small mammals were trapped for 23 months on two live trap grids in tidal marshes in Northampton County, on the Eastern Shore of Virginia, to examine ecological relationships between the marsh rice rat (Oryzomys palustris) and the meadow vole (Microtus pennsylvanicus). Population density, survival rates, capture probability, recruitment, residence time, and home range size were calculated for each species. Patterns of reproductive activity and fluctuations in mean weight were also observed.

There were considerable differences in population dynamics between the two sites. At Grid 2, where vegetative cover was more abundant, population densities of rice rats and meadow voles …

The Annual Reproductive Cycle Of Oryzomys Palustris In A Virginia Tidal Marsh, Erin A. Dreelin

Biological Sciences Theses & Dissertations

The objectives of my study were to determine when the marsh rice rat (Oryzomys palustris) begins and ends reproduction during the year, if there are seasonal changes in litter size, and the weight at which sexual maturity is reached. Monthly samples of rice rats were trapped from May 1995 to May 1996 in Northampton County, Virginia. Rice rats were trapped with Fitch live traps, euthanized in the field, and brought to the lab for necropsy. Data from two other studies of rice rats in Northampton County were also examined. Potential breeders did not reproduce with equal intensity throughout the …

Mark-Recapture Creel Survey And Survival Models, Shampa Saha

Mathematics & Statistics Theses & Dissertations

In this dissertation, we consider a model based approach to the estimation of exploitation rate of a fish population by combining mark-recapture procedures with a creel survey. We also consider the analysis of a proportional hazards survival model for randomly censored observations, known as the Koziol-Green model. The model assumes that the lifetime survivor function is a power of the censored time survivor function.

In Chapter 2, we introduce the model based approach to the estimation of the exploitation rate of a fish population by combining mark-recapture procedures with a creel survey. We assume that in the beginning of a …

The Effect Of Growth Hormone Release On Plasma And Erythrocyte Selenium And Zinc Levels In Children, Maria Estela Legal De Reid

Chemistry & Biochemistry Theses & Dissertations

Research studies have suggested that selenium may be important in the release of growth hormone, GH. A selenium-containing amino-acid residue, selenocysteine, has been identified as part of the active site of the three isoenzymes (Type I, II and III iodothyronine 5' -deiodinase) responsible for the synthesis of active thyroid hormone, T_3, which is reported to stimulate GH secretion. The importance of zinc in growth is well- documented because of its involvement in transcription and expression of GH and its intermediary, insulin growth factor I or IGF- I. Thus, selenium and zinc levels in plasma may be altered in response …

Speciation Of Selenium In Serum, Alice Tsapayi-Musapatike

Chemistry & Biochemistry Theses & Dissertations

We investigated the separation of selenoprotein P and extracellular (serum) glutathione peroxidase using a concanavalin A affinity column. We were able to show that the method does not adequately separate serum glutathione peroxidase from selenoprotein P because human glutathione peroxidase binds strongly to the column. We also found that albumin can interfere with measurement serum of glutathione peroxidase activity when hydrogen peroxide is used as the substrate. When t-butyl hydroperoxide was used as the substrate, less than 10% of the measured activity was due to the presence of albumin. We also found that the pH of the elution buffer plays …

Interaction Of Acth And Estradiol In The Regulation Of Growth, Differentiation, And Steroidogenic Maturation Of The Baboon Fetal Adrenal Gland, Maria Gomez Leavitt

Theses and Dissertations in Biomedical Sciences

The present study determined whether the growth of, as well as ACTH receptor and P-450 enzyme messenger ribonucleic acid and/or protein levels in the baboon fetal adrenal are dependent upon fetal pituitary ACTH during mid and late gestation and the mechanism by which placental estrogen modulates ACTH actions. Administration of betamethasone (3mg/day) to baboon mothers on days 60-99 of gestation and to the fetus (0.6 mg/, n = 4) or to the fetus (0.6mg) and mother (6 mg/ml; n = 4) every other day between days 150-164 of gestation (term = 184 days) decreased (P $53β-hydroxysteroid dehydrogenase-isomerase (3β-HSD(+)ctochrome P450 17α-hydroxylase, …

Systematics Of The Freshwater Amphipod Genus Crangonyx (Crangonyctidae) In North America, Jun Zhang

Biological Sciences Theses & Dissertations

The systematics of the amphipod genus Crangonyx of North America (north of Mexico) is revised, based on available collections (ca. 2240) and literature dealing with the genus. A grand total of 42 North America species of Crangonyx are recognized in the present study, 24 of them new to science. All species are described or redescribed and figured, utilizing external morphological features. Keys to both species groups and individual species are given. Phylogenetic trees are built using computer programs (PAUP, Hennig86, MacClade) based on 26 characters. Wagner parsimony produced 18 parsimonious trees and Fitch parsimony produced 45 trees. The consensus tree …

Characterization Of The Fast Axonally Transported Proteins In The Rat Optic Pathway, Surafel Mulugeta

Theses and Dissertations in Biomedical Sciences

The fast axonally transported proteins represent a subset of neuronal proteins that are conveyed anterogradely as secretory vesicle constituents from the perikarya. Although fast transport displays properties consistent with the general secretory pathway, neuronal structure presents special problems which may require modifications of the general pathway. The elucidation of these special modifications is essential for a more complete understanding of neuronal function both in normal and pathological conditions. In order to characterize the fast transported (FT) proteins and to better understand fast transport trafficking, the FT of radiolabeled retinal ganglion cell (RGC) proteins in the adult rat optic pathway was …

Endothelial Nitric Oxide Synthase And Growth Factor Regulation Of Flow-Mediated Vascular Remodeling, David Anthony Tulis

Theses and Dissertations in Biomedical Sciences

This study was designed to characterize structural remodeling of male Wistar rat mesenteric arteries exposed to elevated blood flow in vivo for 1, 3, or 7 days. A series of arterial ligations induced blood flow increases in ileal and second-order branch arteries compared to same animal control vessels. Neither mean carotid nor local mesenteric arterial pressures changed significantly pre- to post-ligation. The primary flow-mediated force in both vessels was shear stress with possible involvement of acute stretch-induced wall stress in the ileal artery. Significant luminal expansion and medial wall hypertrophy occurred in the ileal and second-order arteries in a time-dependent …

Stomach Content Analysis Of Stranded Bottlenose Dolphins, Tursiops Truncatus, In Virginia, 1987-1996, John Mcgurk

Biological Sciences Theses & Dissertations

I examined the stomach contents from 94 bottlenose dolphins, Tursiops truncatus, that were stranded along the Virginia coastline from 1987 through 1996. Samples from 1987 through 1991 were obtained from the National Museum of Natural History (NMNH) and samples from 1992 through 1996 were collected by the Virginia Marine Science Museum (VMSM) Stranding Team. Prey species were identified using fish otoliths and cephalopod beaks.

The dolphins examined fed on 23 species of fish and one genus of cephalopods. The primary prey species was Atlantic croaker (Micropogonias undulatus); secondary species were weakfish (Cynoscion regalia), spot (Leiostomus xanthurus), silver perch (Bairdiella chrysoura), …

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 …

The Marine Corps In Vietnam: An Examination Of Cohesion And Effectiveness At Khe Sanh, Gregory L. Davenport

History Theses & Dissertations

The Marine defense of the Khe Sanh Combat Base in 1968 provides an isolated model to study combat cohesion and effectiveness. Focusing on Companies K and L of the 3d Battalion, 26th Regiment, reveals that cohesion and effectiveness were composed of four interlocking components: universal, cultural, institutional, and situational. Universal sources include the primary group, ideology, esprit de corps, small unit leadership, and social systems. Culturally, Marine recruitment images and pop-culture literature and cinema, which highlighted the Corps and combat as epitomizing manhood, influenced the Khe Sanh marines. Institutionally, the Corps used Marine history and gender manipulation during boot …

Impounded V.

1997 Decisions

USDC for the District of the Virgin Islands

Agricultural Research Division 111th Annual Report 1997

Agricultural Research Division: News and Annual Reports

It is a pleasure to provide you with the 111th Annual Report of the University of Nebraska Agricultural Research Division (ARD). Once a year we take the opportunity to assess what has been accomplished by our faculty, students, and staff during the past twelve months. In looking at the report, one cannot help but be impressed with the increasing outputs from our research program, but more important is the new technology and knowledge provided to Nebraskans to improve the profitability and competitiveness of their enterprises, to enhance the environment, and to improve their quality of life.

This report provides some …

Department Of Radiology-Annual Report-July 1, 1996 To June 30, 1997, David C. Levin

Department of Radiology Administrative Documents and Reports

Department of Radiology Annual Report, July 1, 1996 to June 30, 1997. Thomas Jefferson University Hospital, Philadelphia, Pennsylvania, United States. 108 pages.

Senior Recital, Jennifer Chung

Printed Performance Programs (PDF Format)

No abstract provided.

Interview With Marvene Chambers, Donna Marie Hobbs, Marvene Teeters Chambers

One-Room Schoolhouse Oral Histories

An interview with Marvene Chambers regarding her experiences in a one-room school house.