Factors Affecting The Parasitism Of Gregarine Species In Grasshoppers In Western Nebraska, 2018 University of Nebraska-Lincoln
Factors Affecting The Parasitism Of Gregarine Species In Grasshoppers In Western Nebraska, Alexandra Creigh, Kristin Mclarty, Scott Lyell Gardner
Honors Theses, University of Nebraska-Lincoln
We conducted a survey of the species of parasites found in grasshoppers around the area of Dunwoody’s Pond to investigate whether there were any species specific parasitic relationships occurring there. We collected grasshoppers from several areas around Dunwoody’s Pond totaling 15 species including Melanoplus bivittatus (Say 1825) , Melanoplus sanguinipes (Fabricius, 1798) , Melanoplus differentialis (Thomas 1865), and Melanoplus femurrubrum (De Geer 1773), along with others (Seymour et al., 2009) and compared the parasites found in them. This study is similar to one conducted in South America by Lloyd in 1951, and we hoped to find connections between species to ...
Evidence For The Priming Effect In Single Strain And Simplified Communities Of Estuarine Bacteria, 2017 University of Tennessee, Knoxville
Evidence For The Priming Effect In Single Strain And Simplified Communities Of Estuarine Bacteria, Abigail Amina Edwards
EURēCA: Exhibition of Undergraduate Research and Creative Achievement
Through their transformation of naturally occurring organic matter, coastal marine bacteria play an essential role in carbon cycling. A phenomenon termed the priming effect (PE) occurs when microbial communities remineralize recalcitrant organic matter faster in the presence of labile organic matter and may be prevalent in coastal systems. To understand how microbial community members interact to induce PE, it is essential to first understand the mechanisms underlying PE in single strains and simplified bacterial communities. The effect to which different concentrations and sources of labile carbon stimulated the production of bacterial biomass from riverine organic matter by two marine bacteria ...
About Logan Weihe And Beloved Microcosm, 2017 University of Illinois at Chicago
About Logan Weihe And Beloved Microcosm, Logan M. Weihe
Steeplechase: An ORCA Student Journal
No abstract provided.
Anti-Staphylococcal Activity Of Variovorax Paradoxus Eps, 2017 California State University, San Bernardino
Anti-Staphylococcal Activity Of Variovorax Paradoxus Eps, Patricia Holt-Torres
Electronic Theses, Projects, and Dissertations
Variovorax paradoxus EPS is a gram-negative rod isolated from the sunflower rhizosphere at CSUSB. Preliminary research has shown that Variovorax paradoxus EPS has anti-staphylococcal activity in liquid and solid co-culture. Anti-staphylococcal activity of Wild type and V. paradoxus EPS 𝚫4519 on 0.5% YE agar with embedded S. aureus AH1710 supports the idea that a soluble molecule is responsible for this activity, as the agar acted as a physical barrier between V. paradoxus EPS and S. aureus colonies. Preliminary genetic analysis of V. paradoxus EPS identified three loci that suitable candidates for the synthesis of a potential anti-staphylococcal small ...
An Integrated Bioinformatic/Experimental Approach For Discovering Novel Type Ii Polyketides Encoded In Actinobacterial Genomes, Wubin Gao
Discovery of new natural products (NPs) is critical both for diseases treatment and crops protection. Numerous NP biosynthetic gene clusters (BGCs) in sequenced microbial genomes allow identification of new NPs through genome mining. Developing an integrated bioinformatic/experimental approach for discovering novel type II polyketides (PK-IIs) facilitates investigation of this family of NPs in an efficient, systematic way. Here, we developed an approach to analyze ketosynthase α/β (KSα/β) gene sequences to predict PK-II core structures, allowing us to target novel PK-II BGCs either from isolated genomic DNA or genomes from the NCBI databank, and to isolate novel PK-IIs ...
Candida And Pseudomonas Interact To Enhance Mucosal Infection In Transparent Zebrafish, 2017 The University of Maine
Candida And Pseudomonas Interact To Enhance Mucosal Infection In Transparent Zebrafish, Audrey C. Bergeron
Electronic Theses and Dissertations
Polymicrobial communities exist throughout the human body and include both fungi and bacteria. During disease, cross-kingdom interactions among bacteria, fungi, and/or the immune system can alter virulence and lead to complex polymicrobial infections. The fungus C. albicans is among the most commonly isolated fungi in the context of fungal-bacterial co-infections and is often accompanied by the bacterium P. aeruginosa at a variety of sites throughout the body including mucosal tissues such as the lung. In vitro, C. albicans and P. aeruginosa have a cyclic, bi-directional, and largely antagonistic relationship, but these interactions do not account for the role of ...
The Fitness Effects Of Biofilm Formation And Toxin Production In Natural Yeast Isolates, 2017 College of William and Mary
The Fitness Effects Of Biofilm Formation And Toxin Production In Natural Yeast Isolates, Bernadette M. Deschaine
Undergraduate Honors Theses
Biofilms are complex, cooperative microbial communities encased in an extracellular matrix and attached to a surface. Biofilms are ubiquitous in virtually all environments and perform many important ecological functions. They can also cause dangerous, drug-resistant infections. There is thus great interest in studying biofilms and how to combat them.
The research presented here uses natural isolates of the budding yeast, Saccharomyces cerevisiae, to explore the fitness effects of biofilm formation. Biofilm-forming and non-biofilm-forming strains were grown alone and in mixed colonies with and without inducing biofilm formation, and the change in biofilm-strain frequency used to determine what conditions favor biofilm-forming ...
Bioethics In The Work Of Ernest Everett Just: + Missing - Some 400 Pages, 2017 Southern Methodist University
Bioethics In The Work Of Ernest Everett Just: + Missing - Some 400 Pages, Theodore Walker
Perkins Faculty Research and Special Events
Biology + ethics = bioethics. Here we see that Howard University biologist Ernest Everett Just (born 1883, died 1941) connected biology to ethics.
According to Just, various forms of specific biology (including especially cell biology) plus “general biology” are necessary for explaining adequately the origin of ethical behaviors. Social ethical behaviors, especially mutual aid and cooperative interactions with others and the environment, are essential to evolutionary advances among living creatures, ranging from humans to cells. Accordingly, theory of ethics (moral theory) should have roots in biology.
Also, Just wrote an unpublished book-length manuscript—“some 400 typed pages” (Just 1940)—on seeking the ...
Scanning Labyrinthulomycete Genomes For Yeast Transcription Factor Binding Site Motifs, 2017 SUNY Stony Brook
Scanning Labyrinthulomycete Genomes For Yeast Transcription Factor Binding Site Motifs, Jackie L. Collier, Joshua Rest
Interdisciplinary Research Data
To develop broadly useful methods for the genetic manipulation of Labyrinthulomycetes (a diverse group of ubiquitous osmoheterotrophic marine protists), it is essential to understand the similarities and differences in regulation of gene expression among them. Toward this end we have used FIMO from the MEME suite (http://meme-suite.org/doc/fimo.html) to identify potential transcription factor binding sites in each of the three available genome sequences: Aplanochytrium kerguelense PBS07, Schizochytrium aggregatum ATCC 28209, and Aurantiochytrium limacinum ATCC MYA-1381
Letter From The Dean, 2017 University of Arkansas, Fayetteville
Letter From The Dean, Lona Robertson
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Investigation Of Media Effects On Sinorhizobium Meliloti Glucose Minus, 2017 University of Redlands
Investigation Of Media Effects On Sinorhizobium Meliloti Glucose Minus, Roxana Apostol
Undergraduate Honors Theses
Although nitrogen fertilizers have certain benefits, the over application of such compounds often results in damages to the ecosystem. In this project, we focus our study on Sinorhizobiom meliloti, a species that lives in symbiosis with alfalfa plants, and through its nitrogen fixation capabilities, restores nitrogen levels in the soil. In our study we aim to gain a better understanding of the carbon metabolism in S. meliloti, mainly by looking at growth patterns in the presence of different carbon sources. Our research picked up on Erik Arvey’s discoveries which pointed out that sucrose inhibits growth of certain glucose minus ...
Toward The History Of Study Of Symbiogenesis: On The English Translation Of B. M. Kozo-Polyansky’S A New Principle Of Biology (1924), Victor Fet
We reproduce the text by Victor Fet, which was read on 6 October 2011 at the Moscow Society of Naturalists during the presentation of new book translation (B.M. Kozo- Polyansky. Symbiogenesis: A New Principle of Evolution / transl. by Victor Fet; ed. by Victor Fet & Lynn Margulis. Cambridge, Mass.: Harvard University Press, 2010. 138 p.) This half- forgotten book by Boris M. Kozo-Polyansky was known only by name to Western biologists. Victor Fet gives a brief history of this new translation, enthusiastically initiated and supported by Lynn Margulis (1938–2011), a famous naturalist who was always eager to gave credit where credit was due. Kozo- Polyansky, along with Merezhkovsky, Portier, and Wallin, pioneered symbiogenetic ideas that were brilliantly developed and vindicated starting from 1960–1970s. It was Lynn Margulis who noticed also that Kozo- Polyansky preceded E. Chatton in recognizing the profound diff erence between prokaryotes and eukaryotes; in fact, he maintained that this difference was due to symbiogenetic, complex nature of the eukaryotic cell! Two “scientistic” poems (in Russian) by Victor Fet are included, dedicated to all the prophets and martyrs of science.
Jmh Dissertation 2016.Pdf, 2016 University of Massachusetts - Amherst
Jmh Dissertation 2016.Pdf, Jennifer Hayashi
The Elasmobranch-Microbe Relationship: Trimethylamine N-Oxide Synthesis, Urea Hydrolysis, And Microbe-Osmolyte Interactions In The Atlantic Stingray, Dasyatis Sabina, 2016 The University of Southern Mississippi
The Elasmobranch-Microbe Relationship: Trimethylamine N-Oxide Synthesis, Urea Hydrolysis, And Microbe-Osmolyte Interactions In The Atlantic Stingray, Dasyatis Sabina, Kaitlin Kelly Doucette
The elasmobranch osmoregulatory strategy is predicated on the accumulation of nitrogenous compounds, primarily urea and trimethylamine n¬-oxide (TMAO). Despite the abundance of these plasma osmolytes, it is notable that elasmobranchs appear to lack urease and TMA oxidase (Tmase), enzymes that scavenge urea-nitrogen and synthesize TMAO, respectively. However, urease and Tmase are found in many species of bacteria. Therefore, I hypothesized that intestinal bacteria are responsible for urease and Tmase activity in elasmobranchs. Absent dietary nitrogen sources, I evaluated the effects of reduced intestinal microbiota on osmoregulation in Atlantic stingray (Dasyatis sabina) in vivo. D. sabina were given daily broad-spectrum ...
Fecal Bacterial Communities As An Indicator Of Trophic Interactions Among Anuran Larvae, 2016 University of Southern Mississippi
Fecal Bacterial Communities As An Indicator Of Trophic Interactions Among Anuran Larvae, Steven Jacob Everman
Anurans are mass spawners, often with multiple females spawning together, resulting in thousands of tadpoles sharing a habitat. Such large numbers of tadpoles with limited dispersal can lead to intense competition for resources. Inter and intra-specific competition for food could have negative impacts on the growth and survival of smaller tadpoles. Fecal bacterial communities have the potential to be used as indicators of changes in diet making it possible to determine if tadpoles in the wild are eating the same food or not. After feeding on two prepared diets that differed in the percentage of complex carbohydrates, the fecal bacterial ...
Identification Of Microorganisms Isolated From Mars-Bound Spacecraft Using Maldi-Tof, 2016 Cal Poly, San Luis Obispo
Identification Of Microorganisms Isolated From Mars-Bound Spacecraft Using Maldi-Tof, Melanie K. Phillips
STAR (STEM Teacher and Researcher) Presentations
The primary goal of the Biotechnology and Planetary Protection Group (BPPG) at the Jet Propulsion Laboratory (JPL) is to prevent microbial contamination between Earth and other planetary bodies. This helps preserve the ability to study other worlds as they exist in their natural states and protects our biosphere from extraterrestrial life. The process for identifying microbes located on space-bound hardware in JPL can be more efficient and precise by using the technique called matrix-assisted laser desorption and ionization time of flight (MALDI-TOF). Once this identification technique is fully implemented, the process time will be reduced from two weeks to one ...
Improving Metabolic Engineering And Characterization Of Clostridium Thermocellum For Improved Cellulosic Ethanol Production, 2016 University of Tennessee, Knoxville
Improving Metabolic Engineering And Characterization Of Clostridium Thermocellum For Improved Cellulosic Ethanol Production, Beth Alexandra Papanek
Biofules are an important option for humanity to move away from its dependence on fossil fuels. Transitioning from food crops to lignocellulosic alternatives for the production of biofuels is equally important. Most commonly, biofuels are produced using a crop such as corn or soybeans to feed sugars to the yeast, Saccharomyces cerevisiae for the fermentation of ethanol. Lignocellulosic biofuel production would eliminate the need for food crops and transition to biomass such as switchgrass, poplar, or corn stover. Currently, lignocellulosic biofuel production is limited primarily because of the cost of converting the biomass to fermentable sugars than can then be ...
Relationship Between Morphogenesis And Secretion In The Filamentous Fungus Aspergillus Nidulans, 2016 University of Nebraska-Lincoln
Relationship Between Morphogenesis And Secretion In The Filamentous Fungus Aspergillus Nidulans, Lakshmi Preethi Yerra
Dissertations and Theses in Biological Sciences
Filamentous fungi have a long history in biotechnology for the production of food ingredients, pharmaceuticals and enzymes. The advancements made in recent years have earned filamentous fungi such as Aspergillus species a dominant place among microbial cell factories. Although the model fungus A. nidulans has been extensively studied, the genetic and regulatory networks that underlie morphogenesis and development have yet to be fully characterized. The Rho GTPases (Cdc42 and RacA) are one of the most important regulators of the morphogenetic processes among diverse eukaryotic organisms. Although the functions of these GTPases are relatively well-characterized, little is known about their downstream ...
Chemokines And Peptides That Promote And Inhibit Cmv Entry, 2016 University of Tennessee, Knoxville
Chemokines And Peptides That Promote And Inhibit Cmv Entry, Elisabeth Anne Pitt
Human cytomegalovirus (HCMV) causes morbidity and mortality in congenitally infected newborns, transplant recipients, and AIDS patients. Currently, there is no approved CMV vaccine to address these issues. In an effort to develop an alternative treatment to CMV we tested our hypothesis that heparan sulfate binding D-peptides would be effective against multiple HCMV strains in vitro and it would be effective in vivo against murine CMV (MCMV) (Chapter 1). We show that the D-peptide is able to reduce CMV infection in vitro and in vivo. Another approach to combating CMV infections is to neutralize pathogenic factors that contribute to CMV spread ...
Oxidative Stress Response In Archaea: Elucidation Of Oxidant Sensing And Tolerance Mechanisms In Methanosarcina Acetivorans, 2016 University of Arkansas, Fayetteville
Oxidative Stress Response In Archaea: Elucidation Of Oxidant Sensing And Tolerance Mechanisms In Methanosarcina Acetivorans, Matthew Edward Jennings
Theses and Dissertations
Methanogens are archaea possessing a conserved metabolic pathway which produces methane. Many of the enzymes in the methanogenesis pathway are Fe-S proteins, meaning methanogens are sensitive to conditions which disrupt Fe-S clusters. Molecular oxygen is capable of disrupting Fe-S clusters through oxidation of the iron atoms. Furthermore, reduced iron can facilitate the production of reactive oxygen species (ROS), meaning methanogens must possess antioxidant mechanisms. Detection and eradication of ROS is important for all cells, due to the potentially fatal consequences of unchecked oxidation. This dissertation presents two separate projects investigating mechanisms the model methanogen Methanosarcina acetivorans possess for dealing with ...