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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
51

Relationships of some environmental factors to growth of three species of fishes in Michigan

Laarman, Percy W. January 1963 (has links)
Thesis (M.S.)--University of Michigan, 1963. / Includes bibliography: leaves [39]-40.
52

Aspects of mature plant resistance in wheat to Puccinia striformia Westend

Thomas, J. E. January 1984 (has links)
No description available.
53

Sitobion avenae : crop colonization, movement of apterae and spread of BYDV

Mann, Judith A. January 1995 (has links)
No description available.
54

Characterization of Host Factors and Anti-viral Compounds for Diverse Mosquito-borne Flaviviruses

Barrows, Nicholas J. January 2016 (has links)
<p>Our ability to convert basic knowledge into robust anti-viral therapeutics requires discovery of novel host-virus interactions as well as an informed anti-viral discovery pipeline. We used a genome-scale RNAi-based screen followed by a chemical screen of FDA-approved therapeutics to identify scores of novel dengue virus (DENV) human host dependency factors (HDF) and identified more than 20 potential anti-Zika virus (ZIKV) therapeutics. </p><p>Two genes in particular, TTC35 and TMEM111, strongly inhibited DENV infection and, based on comparisons with published literature, implicated a larger protein, the ER Membrane Protein Complex (EMC), as a pan-flavivirus HDF. The EMC is a poorly characterized multiprotein complex that may function in ER-associated protein biogenesis and/or lipid metabolism. Based on our screen data, we hypothesized that the EMC is an uncharacterized HDF that functions through a common mechanism to promote replication of flaviviruses. We report that DENV, ZIKV, and yellow fever virus (YFV) infections were impressively inhibited, while West Nile Virus (WNV) infection was unchanged, in cell lines engineered to lack EMC subunit 4 (EMC4). Furthermore, targeted depletion of EMC subunits in live mosquitos significantly reduced DENV-2 propagation in vivo. In addition, the accumulation of DENV proteins shortly after infection in EMC4 knockout cells was significantly reduced, suggesting that the EMC promotes viral protein biogenesis. </p><p>We interrogated a library of FDA-approved drugs for their ability to block infection of human HuH-7 cells by a newly isolated ZIKV strain. Selected compounds were further validated for inhibition of ZIKV infection in human cervical, placental, and neural stem cell lines, as well as primary human amnion cells. Established anti-flaviviral drugs (e.g., bortezomib and mycophenolic acid) and others that had no previously known antiviral activity (e.g., daptomycin) were identified as inhibitors of ZIKV infection. Several drugs reduced ZIKV infection across multiple cell types.</p><p>We propose that the EMC may be exploited as a novel therapeutic target for multiple flaviviruses in the future. Also we identified drugs that could be tested in clinical studies of ZIKV infection and provides a resource of small molecules to study ZIKV pathogenesis.</p> / Dissertation
55

Chronological and biological senescence in wild yellow-bellied marmots (Marmota flaviventer)

Kroeger, Svenja Brigitte January 2017 (has links)
Senescence is an intricate, multifaceted process that can vary among populations, individuals, and traits within individuals. However, the relative importance of factors generating observed differences in senescence patterns remains poorly understood. In particular, there is a lack of studies that quantify both age-dependent and state dependent components of senescence, and do so across different environmental conditions. Also, few studies have explicitly tested cumulative reproductive costs, or how early-life conditions like maternal age and state at offspring birth affect offspring adult phenotypes and senescence trajectories. I use individual-based long-term data from wild yellow-bellied marmots, to quantify chronological (age-dependent) and biological (state-dependent) senescence in female reproductive success and season-specific body mass across two different elevational environments. Since previous reproductive history could influence biological age, I also estimate costs of previous short-term and cumulative long-term reproduction on females' current reproductive success. Finally, I test whether maternal age and state at daughter birth affect daughter reproduction and senescence. I demonstrate complex senescence patterns in body mass and reproductive success. First, senescence in body mass has both age-dependent and state-dependent components, and effects are greater at lower elevation than higher elevation and greater in late summer than in spring. Second, at both elevations, females that reproduced frequently and weaned large litters in previous years have reduced current reproductive probability, while there are no short-term effects of previous reproduction. Finally, higher chronological age and closer proximity to death of the mother have positive environment-dependent effects on daughter reproductive trajectories. Overall, my findings reveal the need to investigate senescence patterns across multiple environments and over long time periods to allow capturing certain intra-individual and inter-generational effects. The persistence of maternal effects into daughters' adult lives highlights the complexity of life-history trade-offs, and calls for more studies that consider such long-term transgenerational effects when studying life-history variation and senescence in wild populations.
56

Studies on the attenuation of flaviviruses following passage in HeLa cells

Dunster, Lee Martin January 1990 (has links)
No description available.
57

Characterization of the role of the 3' noncoding region of turnip yellow mosaic virus RNA

Tsai, Ching-Hsiu 23 February 1993 (has links)
Graduation date: 1993
58

An inaugural dissertation on the origin and propagation of the yellow fever. : Submitted to the public examination of the faculty of physic under the authority of the trustees of Columbia College, in the state of New-York; the Right Rev. Benjamin Moore, D.D. president; for the degree of doctor of physic, on the 4th of May, 1802. /

Bayley, Joseph, Post, Wright, Ledyard, Isaac, Tillary, James, Miller, Edward, January 1802 (has links)
Caption title: An inaugural dissertation on yellow fever. / Dedicated to Dr. Wright Post, professor of anatomy and surgery in Columbia College, and also to Dr. Isaac Ledyard, health officer, Dr. James Tillary, resident physician, and Dr. Edward Miller, health commissioner.
59

Combinations of selected sulfonylurea herbicides with S-Metolachlor for nutsedge control in tomatoes

Adcock, Collin Wayne, January 2007 (has links) (PDF)
Thesis (M.S.)--Auburn University, 2007. / Abstract. Vita. Includes bibliographic references.
60

The development of molecular markers for barley Yd2, the barley yellow dwarf virus resistance gene /

Paltridge, Nicholas G. January 1998 (has links) (PDF)
Thesis (Ph. D.)--University of Adelaide, Dept. of Plant Science, 1998. / Includes bibliographical references (15 leaves ).

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