Digital Commons Network^™

Crop Watch No. 2001-18, July 20, 2001, Lisa Brown Jasa

Crop Watch (1994–2005)

Field Updates..........158

Soybean weed Control..........159

New BLB Thresholds..........160

Assessing Rootworm Damage..........162

Grazing Dryland Corn..........162

White Wheat Update..........164

Research Focus on Lyon..........165

Ally Okayed for Sorghum..........165

Thistle Caterpillars..........166

Sunflower Insect Alert..........167

Crop Watch No. 2001-19, August 3, 2001, Lisa Brown Jasa

Crop Watch (1994–2005)

Field Updates..........168

Western Nebraska Insects..........170

Western Wheat Yields..........171

Preventing Wheat Diseases..........171

Bacterial Stalk Rot in Corn..........172

Soybean Field Days..........173

2nd ECB Flight..........174

Planting Alfalfa..........174

Terminating Farm Leases..........175

Wright's Research Areas..........176

Forage Options..........176

Crop Watch No. 2001-20, August 17, 2001, Lisa Brown Jasa

Crop Watch (1994–2005)

Field & Pest Updates..........178

Late Bean Leaf Beetles..........179

Irrigating Alfalfa..........180

Entomology Research..........181

Wheat Planting, Dates..........182

Wheat Resources..........184

Wheat Insurance Trends..........184

Charcoal Rot in Soybeans..........185

Adding Manure to Alfalfa..........185

Federal Aid Programs..........186

Women in Agriculture..........186

Crop Watch No. 2001-25, October 26, 2001, Lisa Brown Jasa

Crop Watch (1994–2005)

To the Readers..........214

Winter Wheat "Good"..........214

Fall Fertilizer Apps..........215

Winterizing Equipment..........216

BT Reregistered..........216

Selecting Seed..........217

Agronomy Highlights..........217

Soybean Trial Yields..........218

Dairy Alfalfa..........219

Tillage Trials..........219

Distance Ed..........220

Extension Meetings..........221

Interactions Between Nova And Brptb Proteins In Alternative Splicing And Nuclear Localization, Alexandros Demetrios Polydorides

Student Theses and Dissertations

The Nova paraneoplastic antigens are neuron-specific RNA-binding proteins that are essential for neuronal viability and participate in the control of alternative splicing. In this study, the yeast two-hybrid system is used to isolate Nova-1nteracting proteins. A novel RNA-binding protein named brPTB is identified, that is closely related to the polypyrimidine tract-binding protein (PTB) and is ennched in the brain at the mRNA and protein levels. brPTB interacts with Nova proteins in vitro and in vivo. Splicing assays in kidney epithelial cell lines show that brPTB inhibits the effect of Noval in the inclusion of alternatively spliced exons in two target …

Impact Of Thymectomy On The Peripheral T Cell Pool In The Context Of Siv Infection, Sarah Tuttleton Arron

Student Theses and Dissertations

The thymus is the primary lymphoid organ responsible for T cell production. It is of particular interest in the context of human immunodeficiency virus (HIV)-1 infection, in which the progressive loss of CD4+ T cells leads to immunodeficiency and opportunistic infection. CD4+ T cell loss is thought to result from direct and indirect killing of CD4 cells in the periphery as well as from pathogenic effects of the virus on the thymus. However, it is not fully understood which is the greater factor in viral-induced CD4+ T cell decay. The development of an assay to detect T cell receptor excisional …

Genetic Studies On The Circadian Clock In The Model Organism Drosophila Melanogaster, Sebastian Martinek

Student Theses and Dissertations

Although the basic neural mechanism that regulates circadian behavior in Drosophila is known in quite some detail, several aspects of this biological process still remain to be elucidated. In this study a variety of genetic and molecular approaches was used to identify and characterize genes that are involved in circadian rhythms and that may shed light on the gaps in the model. In an F1 screen for altered period length of the circadian locomotor activity cycle the new mutation 2ob9 was isolated. Cloning and sequencing identified the affected gene as a Drosophila homolog of the yeast RNA helicase and splicing …

Antigenic Variation And Telomere Structure In Trypanosoma Brucei, Jorge Luis Munoz Jordan

Student Theses and Dissertations

Trypanosoma brucei survives immune attack in its mammalian hosts by periodically changing the variant surface glycoprotein (VSG). From the ~1000 VSG genes (VSGs) scattered throughout the genome, a few are located at telomere loci called expression sites (ESs) and only one is expressed at any time, suggesting a stringent regulatory mechanism. Here, it is demonstrated that trypanosomes engineered to express two VSGs simultaneously from the same ES can multiply in cultures and infect animals normally. Mechanisms involved in the control ES-associated gene expression are thought to involve some kind of telomere position effect. Telomeres typically contain simple DNA repeats (TTAGGG …

Molecular Anatomy Of A Living Nerve Terminal: Actin And Synapsin In The Synaptic Vesicle Cycle, Ona E. Bloom

Student Theses and Dissertations

Neurotransmission is based on a series of events termed the synaptic vesicle cycle. Several molecular components contributing to the synaptic vesicle cycle are known, including the cytoskeletal protein actin and the synaptic vesicle-associated phosphoprotein synapsin. The studies presented in this thesis were designed to investigate the role of the interaction between synapsin and actin in an intact model of synaptic transmission, the lamprey reticulospinal synapse. To establish the role of actin in the presynaptic terminal, several actin-directed compounds were injected into reticulospinal axons. Axons were maintained at rest or stimulated under various conditions, fixed, and the ultrastructure of the terminal …

Receptor- G Protein Interactions In The Visual System: A Study Of Structures And Mechanisms That Couple The Cytoplasmic Surface Of Rhodopsin To The Nucleotide-Binding Pocket Of Transducin, Ethan P. Marin

Student Theses and Dissertations

The intermolecular interaction between the photoreceptor rhodopsin and the heterotrimeric G protein transducin (Gt) initiates the vertebrate phototransduction cascade. This interaction also serves as a model system for the study of the molecular basis of related G protein-coupled receptor mediated signal transduction systems. Photoactivated rhodopsin (R*) activates Gt by catalyzing the exchange of bound GDP for GTP on its α subunit (Gα). The structure of the R*-Gt complex and the mechanism of nucleotide exchange are unknown. We studied the function of the fourth cytoplasmic loop (C4) of rhodopsin in interactions with Gt. Chimeric mutants of rhodopsin were characterized in which …

Mechanisms Of Traf Signaling, Joseph R. Arron

Student Theses and Dissertations

This thesis describes the investigation of the mechanisms of signal transduction activated by tumor necrosis factor (TNF) superfamily proteins. Ligands of the TNF family engage TNF receptor (TNFR) family proteins, leading to a wide variety of cellular effects, these interactions are implicated in inflammation, immune regulation, bone homeostasis, and development. TNFR proteins lack intrinsic enzymatic activity, and are coupled to intracellular signaling cascades by TNFR associated factor (TRAF) proteins, which are cytoplasmic adaptor molecules. The roles of TRAF1, TRAF2, and TRAF6 are investigated structurally and functionally in the activation of NF-κB, AP-1, and Src-family kinases. Cbl proteins are identified as …

Functional Analysis Of The Human Telomeric Protein Trf2, Agata Smogorzewska

Student Theses and Dissertations

TTAGGG Repeat Binding Factor 2 (TRF2) is a ubiquitous human telomeric protein present at all telomeres throughout the cell cycle. TRF2 has been proposed remodel telomeres into large lasso-like structures named t-loops. Removal of TRF2 from telomeres by expression of a dominant negative allele of TRF2 (TRF2ΔBΔM) led dissolution of these structures and appearance of end-to-end fusions visible in metaphase and anaphase cells. Fusion formation was accompanied by the loss of Goverhang, but not by the loss of double stranded telomeric DNA, which can be documented to persist at the sites of fusions. Fusions were covalent and their formation was …

Biological Terrorism: Legal Measures For Preventing Catastrophe, Barry Kellman

College of Law Faculty

No abstract provided.