Digital Commons Network^™

Small Acreage Irrigation System Selection, James V. Barnhill, Robert W. Hill, Ronald Patterson

All Current Publications

Irrigation has been an essential part of Utah’s agricultural production since pioneer days. Utah’s 1.3 million irrigated acres are primarily watered with surface irrigation methods.

A Three Dimensional Numerical Investigation Of A Donor Material In Friction Stir Welding, Justin M. Rice

Mechanical & Aerospace Engineering Theses & Dissertations

Excessive tool wear generated during the plunge phase of Friction Stir Welding has slowed the pace of expanding the Friction Stir Welding process to hard materials such as steel. This research uses a finite element model of the Johnson-Cook material constitutive law to investigate the shear stresses, axial forces, and temperatures experienced by the tool and the workpiece during the plunge stage of Friction Stir Welding. The model in this research was developed using the commercially available finite element analysis software ABAQUS/Explicit and consists of both a deformable workpiece and a deformable tool. By implementing the concept of using a …

Effects Of Creep Supplementation While Grazing Improved Irrigated Pastures, A. F. Summers

All Current Publications

This publication describes results of a study of creep supplementation versus grazing among calves.

Changing Fecundity And Reproductive Output In Females Of A Chesapeake Bay Population Of Blue Crab, Callinectes Sapidus, Shannon L. Wells

OES Theses and Dissertations

The Chesapeake Bay blue crab, Callinectes sapidus, is an important species both ecologically and as a fishery. Fishery dependent and independent data indicate that the population declined abruptly in the mid-1990s and has remained low. Previous work prior to the decline in population abundance found a significant relationship between size and fecundity for mature females. As with many heavily fished populations, this population has experienced a reduction in the size at maturity. The objectives of this study were to reassess the fecundity of the population, determine the lipid and protein energy allocated for reproduction, and to examine the concentrations …

Lipid Targets Of The Antimalarial Trioxanes In Plasmodium Falciparum, Carmony Leah Hartwig

Biological Sciences Theses & Dissertations

Malaria is among the most debilitating diseases of man. The protozoan parasite, Plasmodium falciparum, causes over a million annual fatalities. The antimalarial trioxanes, exemplified by artemisinin, are among the few pharmaceuticals for which clinical resistance has not become widespread. Artemisinin is a naturally occurring sesquiterpene lactone, containing a unique endoperoxide pharmacophore. Despite extensive study, the precise antimalarial mechanism of action of trioxanes remains elusive. Heme iron-mediated cleavage of the endoperoxide within the parasite digestive vacuole is hypothesized to generate cytotoxic metabolites capable of alkylating heme and damaging cellular macromolecules. The hypothesis of this research is that the endoperoxide pharmacophore …

Biotic And Abiotic Characteristics Influencing Nest Location And Trophic Relationships Of The Fungus-Growing Ant Trachymyrmex Septentrionalis (Formicidae: Attini), Jonathan Paul Howell

Biological Sciences Theses & Dissertations

Trachymyrmex septentrionalis represents the only species of fungus-growing ant in the southeastern United States. T. septentrionalis cultivates a symbiotic fungus on which the ants feed. Worker ants collect plant and animal debris to feed the fungus. These ants are common in Florida, but increasingly scarce as they near the northern extent of their range in New Jersey. Colonies of T. septentrionalis occur in patches throughout Blackwater Ecological Preserve, a longleaf pine forest in southeastern Virginia. Blackwater Ecologic Preserve is a 129 hectare tract of land, located in Isle of Wight county, that is undergoing a regimen of controlled burning to …

Poverty Reduction Through Local Wisdom(A Case Study From Buru Island-Maluku And Surade-West Java), Marcus J. Pattinama

Makara Human Behavior Studies in Asia

Literature reviews on the concept of poverty and local observation on the field study were employed to investigate who the poor are, in order to seek alternative policies according to specific local conditions to combat poverty, and to see local wisdom in a preventive effort to reduce poverty. Survey methodology, in-depth interviews and focus groups discussions were used in this study. The findings suggest that the concept of poverty is multifacet. Both Bupolo people and Surade farmers cultivate small land. While Surade farmers are poor with no or limited land size and with relatively small scales' business, Bupolo people have …

Orange Juices Enriched With Chitosan: Optimisation For Extending The Shelf-Life, Catherine Barry-Ryan, Ana Belen Martin-Diana, Daniel Rico, J. Barat

Articles

Optimisation of the incorporation of chitosan in orange juice was accomplished by the evaluation of quality and nutritional markers. Response surface methodology was applied to obtain quadratic and second degree response surface model equations. The analyses showed that increases in chitosan concentration extended the quality of the orange juice significantly (p < 0.05), reducing enzymatic and non-enzymatic browning and controlling the spoilage during the storage time; however, concentrations N 1 g L− 1 produced a significant (p < 0.05) reduction in the concentrations of ascorbic acid and carotenoids associated with the positive charge of chitosan and its ability to flocculate and coagulate negatively charged substances. Also, concentrations N 1 g L− 1 were scored as unacceptable for the sensory panel due to an increase in bitterness. The study recommends the use of chitosan at concentrations up to 1 g L− 1 to extend quality and preserve ascorbic acid and carotenoids during storage time of fresh orange juice, thus avoiding the use of standard thermal treatments which produces a negative impact on the nutritional value. Industrial relevance: One of the major problems of fresh orange juice is its limited shelf-life. Spoilage and quick degradation of vitamins are two of the most important causes of quality loss during the shelf-life of this product. Moreover, the U. S. Food and Drug Administration issued a warning to consumers against drinking unpasteurised orange juice products because of the potential contamination with Salmonella typhimurium and its association with an outbreak of human disease caused by this organism [FDA issues nationwide health alert on Orchid Island unpasteurised orange juice. Products Recalls, Market Withdrawals and Safety Alerts.]. The main objective of this study was the study of chitosan as a natural preservative for extending the shelf-life of orange juice and as an alternative to pasteurisation.

Identification Of Volatile Quality Markers Of Ready-To-Use Lettuce And Cabbage, Catherine Barry-Ryan, Michael Devereux, Julien Lonchamp

Articles

Volatile emission changes of ready-to-use vegetables directly result from minimal processing and can reflect the sensory changes occurring in the product. Based on the detection of key volatile compounds, novel on-line and consumer quality-monitoring methods can be developed. The aim of this study was to identify volatile biomarkers for a range of leafy green ready-to-use vegetables (Butterhead and Iceberg lettuce and Irish York cabbage). Headspace volatile compounds were monitored using gas chromatography/mass spectrometry (GC/MS). The sensory quality of the products was evaluated at days 1, 7 and 14 using sensory and analytical measurements. Changes of volatile concentrations and sensory attributes …

Advances In Neural Networks Research: An Introduction, Robert Kozma, Steven Bressler, Leonid Perlovsky, Ganesh K. Venayagamoorthy

Electrical and Computer Engineering Faculty Research & Creative Works

The present Special Issue "Advances in Neural Networks Research: IJCNN2009" provides a state-of-art overview of the field of neural networks. It includes 39 papers from selected areas of the 2009 International Joint Conference on Neural Networks (IJCNN2009). IJCNN2009 took place on June 14-19, 2009, in Atlanta, Georgia, USA, and it represents an exemplary collaboration between the International Neural Networks Society and the IEEE Computational Intelligence Society. Topics in this issue include neuroscience and cognitive science, computational intelligence and machine learning, hybrid techniques, nonlinear dynamics and chaos, various soft computing technologies, intelligent signal processing and pattern recognition, bioinformatics and biomedicine, and …

Inhibition Of Yeast Hexokinase By The Antimalarial Drug Artemisinin: Probing Mechanism Of Action With A Model Enzyme, Jennifer S. Spence

Biological Sciences Theses & Dissertations

A leading infectious cause of death, malaria threatens approximately half of the world's population, and drug-resistant strains of Plasmodium falciparum have created immense difficulty in chemotherapy of the disease. The artemisinin (ART) class of antimalarials may represent a powerful solution. In addition to their safety, effectiveness, and moderate cost, they are the only drugs in use for which there has been no widespread evidence of clinical resistance. The exact parasiticidal mechanism of ART is highly contested, but evidence suggests that protein alkylation may play a role in cytotoxicity. in vitro essays were performed using yeast hexokinase (HK) to demonstrate a …

The Use Of Fourier Transform (Ft) Surface-Enhanced Raman Scattering For Biochemical Analysis, Robert Butler Jeffers

Chemistry & Biochemistry Theses & Dissertations

Surface-enhanced Raman scattering (SERS) is a powerful spectroscopic technique that has created exciting opportunities in the field of bioanalytical chemistry, where it combines ultrasensitive detection of biologically relevant molecules with vibrational spectroscopy. Due to the difficulties in preparing reproducible SERS active substrates, SERS has been mainly used as a qualitative tool. In order for SERS to be utilized as a viable tool for quantitative analysis, simple, facile SERS substrates which generate clean, highly reproducible signals must be developed. This dissertation deals with the evaluation of three different methods of SERS that led to the development of a novel substrate for …

Relationships Between Black Female College Students' Relationships With Their Fathers And Adult Romantic Attachment, Nicole A. Dock

Psychology Theses & Dissertations

The current study examined the relationships between the quality and quantity of time that young Black female college students spent with their fathers during high school as related to romantic attachment and fear of intimacy. Although researchers have investigated the impact that early attachment bonds to mothers have for later psychosocial development, much less research has examined how attachment to fathers may be associated with psychosocial adjustment in young adulthood. In particular, there is a lack of information on how relationships to one's father or father figure may be associated with adjustment in young women from culturally diverse populations.

To …

The Joy Of Difference: Foucault And Hadot On The Aesthetic And The Universal In Philosophy, Cory Wimberly

Philosophy Faculty Publications

The intersection of Foucault and Hadot's work in the philosophy of antiquity is a dense and fruitful meeting. Not only do each of the philosophers offer competing interpretations of antiquity, their differences also reflect on their opposing assessments of the contemporary situation and the continuing philosophical debate between the universal and the relative. Unpacking these two philosophers’ disagreements on antiquity sheds light on how Hadot’s commitment to the Universal and Foucault’s commitment to an aesthetics of existence stem from their diagnoses of the present and the persistent philosophical issue of universalism. This line of analysis is especially productive to pursue …

Temporal Geophysical Signatures From Contaminant-Mass Remediation, Vukenkeng Che-Alota, Estella A. Atekwana, Eliot A. Atekwana, William August Sauck, D. Dale Werkema

Geosciences and Geological and Petroleum Engineering Faculty Research & Creative Works

We have previously documented changes in bulk electrical conductivity, self-potential (SP), and ground-penetrating-radar (GPR) reflections in a field setting caused by biogeochemical transformations of hydrocarbon-contaminated media. These transformations are associated with hydrocarbon biodegradation. The results of surface geophysical surveys acquired in 1996, 2003, and 2007 document changes in geophysical signatures associated with removing hydrocarbon mass in the contaminated zone. Initial investigations in 1996 showed that relative to background, the contaminated area was characterized by higher bulk electrical conductivity, positive SP anomaly, and attenuated GPR reflections. Repeated surveys in 2003 and 2007 over the contaminated area showed that in 2007, the …

Effect Of The Herbivorous Channel Clinging Crab (Mithrax Spinosissimus) On Patch Reef Algal Communities In The Florida Keys, Florida (Usa), Angela M. Mojica Osorio

Biological Sciences Theses & Dissertations

Coral reefs worldwide are undergoing dramatic habitat modification from coral to macroalgal dominance due to water pollution, coral diseases, global. warming, and the loss of herbivores. This phase-shift bas been particularly severe on Caribbean reefs due in large measure to the decline of piscine and echinoderm grazers, whose presence appears crucial for stemming the decline of coral reefs and enhancing their resilience. Virtually unknown, however, is the role of other macrograzers in coral reef ecosystems. This is the first study to examine the feeding ecology and grazer effect of the herbivorous West Indian spider crab (Mithrax spinosissimus) on inshore patch …

The Statewide Standard, Summer 2009, College Of Education

The Statewide Standard

No abstract provided.

Roots

Roots

No abstract provided.

National Aglaw Center Research Article, J.E.M. Ag Supply, Inc. V. Pioneer Hi-Bred International, Inc.: Its Meaning And Significance For The Agricultural Community, Michael T. Roberts

Southern Illinois University Law Journal

Biotechnology development in agriculture has raised challenging intellectual property issues. These issues are framed in the context of a three-prong plant patent statutory scheme, involving the Utility Patent Act, the Plant Variety Protection Act, and the Plant Patent Act. The agricultural community, which includes agricultural biotechnology companies, seed companies, and agricultural producers, has debated whether utility patents are excluded from the scope of the Utility Patent Act. Producers contended that Congress superceded the Utility Patent Act when it created the Plant Variety Protection Act and the Plant Patent Act and that sexually reproducing plants (seeds and seed grown plants) are …

Annual Report Of The University, 2008-2009, Volumes 1-6, University Of New Mexico

UNM Annual Reports

Division of Enrollment Management 2008-2009 Goals and Accomplishments • Enrollment Results: Broke the funding formula 3% "enrollment band" in 2009. This had not been done since 2003. Increased Fall 2008 new freshmen by 10.8%. Increased Spring 2009 transfer students by 12.6%. Increased National Scholars from 14 in 2007 to 39 in 2008 and 73 in 2009 (92% increase). Overall enrollment for Fall 2009 increased 5.75% including 5.7% for new freshmen, 30% for new transfers with large growth in non-residents. • Expanded our communication capacity by purchasing Hobson\'s EMT E-Mail software that allows us to communicate more frequently and effectively with …

Faculty Publications & Presentations, 2008-2009, University Of Arkansas, Fayetteville

Faculty Publications and Presentations

No abstract provided.

Benthic Habitat Mapping Of Miami-Dade County: Visual Interpretation Of Lads Bathymetry And Aerial Photography, Brian K. Walker

Marine & Environmental Sciences Faculty Reports

No abstract provided.

Annual Report, 2008-2009, University Of Arkansas, Fayetteville. Office Of The Vice Provost For Research, University Of Arkansas, Fayetteville. Graduate School And International Education

Graduate School and International Education Annual Report

No abstract provided.

Environmental Indicator Report, Philip Trowbridge

PREP Reports & Publications

The following sections contain the most recent data for the 42 indicators tracked by PREP. In some cases PREP funds data collection and monitoring activities; however data for the majority of indicators are provided by other organizations with monitoring programs. The details of the monitoring programs and performance criteria for the indicators are listed in the PREP Monitoring Plan (PREP, 2008).

Vegf-A As An Inhibitor Of Angiogenesis And Methods Of Using Same, Jayakrishna Ambati

Ophthalmology and Visual Science Faculty Patents

The invention relates to methods and compositions for the treatment or prevention of ocular angiogenesis and neovascularization associated with neovascular disease. Administration of vascular endothelial growth factor (VEGF)-A into the eye when macrophage infiltration is reduced inhibits ocular angiogenesis.

Bivm (Basic, Immunoglobulin-Like Variable Motif-Containing) Gene, Transcriptional Products, And Uses Thereof, Gary W. Litman, Noel A. Hawke, Jeffrey A. Yoder, Donna D. Eason

USF Patents

The subject invention provides polynucleotide sequences, designated BIVM, and transcriptional/translational products obtained from the polynucleotide sequences of the invention. The subject invention also provides polynucleotide and polypeptide sequences provided by SEQ ID NOs:1-28. Also provided are methods of detecting the presence of BIVM nucleic acids or polypeptides in samples suspected of containing BIVM genes, BIVM transcriptional products, or BIVM translational products. These methods are also useful for the detection of BIVM orthologs. Other embodiments provide polypeptide and/or nucleic acid vaccines for the induction of an immune response to in an individual. Kits for detecting the presence of BIVM genes, orthologs …

Management And Control Of Asthma In Patients Attending A Specialist Centre In Oman, Omar A. Al-Rawas, Jayakrishnan B, Fatma Ben George, Jojy, Sawsan A. Baddar, Bazdawi M. Al-Riyami

Sultan Qaboos University Medical Journal

Objectives: The management of asthma by specialists is likely to become more evidence-based. This study analysed the characteristics of patients reporting to a specialist clinic including demographics, dispensed medications and the level of asthma control. Methods: All consecutive stable asthmatics seen in the adult pulmonary clinics of Sultan Qaboos University Hospital, Oman, between December 2005 and November 2006 were prospectively evaluated using a structured assessment protocol. Results: Of the 207 patients, (mean age 40.64 ±14.8), 72% were females. The majority, 83.1%, had moderate persistent asthma. A positive history of allergic rhinitis, eczema and a family history of asthma were obtained …

The Impact Of Chronic Liver Diseases On The Level Of Heart-Type Fatty Acid-Binding Protein (H-Fabp) Concentrations, Hafidh A. Al-Hadi, Brent William, Keith A.

Sultan Qaboos University Medical Journal

Objectives: Heart-type fatty acid binding-protein (H-FABP) has been reported to be a potential novel biochemical marker for the early diagnosis of acute myocardial infarction (AMI). The presence of H-FABP in the liver has not been reported. The aim of this study was to compare the effect of chronic liver diseases on the level of H-FABP concentrations. Methods: The effects of chronic liver diseases including infective hepatitis and cirrhosis on the concentration of H-FABP was studied in a small group of patients (n=10, mean age ±SD = 58.33 ± 7.19 years). The serum concentrations of the following markers were measured: H-FABP, …

Fundamentals Of Psychology, Samir Al-Adawi

Sultan Qaboos University Medical Journal

No abstract provided.

Radiation Exposure Levels In Family Members Of Omani Patients With Thyrotoxicosis Treated With Radioiodine (131i) As Outpatients, Ibtisaam Al-Maskery, Haddia Bererhi

Sultan Qaboos University Medical Journal

Objectives: This study was conducted to assess whether the radiation exposure levels of Omani family members of thyrotoxic patients, if treated with radioiodine therapy as outpatients, are within the international and local radiation dose limits in order to allow them to be treated as outpatients. Methods: The study included 86 family members of 22 self-dependent thyrotoxic patients (29 children ≤ 16 yrs and 57 adults including 11 spouses and 8 parents). The mean age of the family members was 26.6 years (range 17 months - 75 years).They were treated with 131I as outpatients and monitored for 10 days in 2007-2008 …