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1,816 full-text articles. Page 6 of 70.

Conservation Of Freshwater Live-Bearing Fishes: Development Of Germplasm Repositories For Goodeids, Yue Liu 2018 Louisiana State University and Agricultural and Mechanical College

Conservation Of Freshwater Live-Bearing Fishes: Development Of Germplasm Repositories For Goodeids, Yue Liu

LSU Doctoral Dissertations

Fishes of the family Goodeidae are considered to be among the most imperiled taxa in the world. The goal of this project was to provide a foundation for development of sperm repositories for goodeids and to use them as a model to assist conservation programs for imperiled freshwater live-bearing fishes. Development of such repositories is challenging because of unusual reproductive characteristics of live-bearing fishes, such as sperm bundles, internal fertilization, and the bearing of live young. Standardized methods were established to evaluate quality-related attributes of sperm bundles. The different features between activation of free and bundled sperm were investigated and ...


Lipid Transport Required To Make Lipids Of Photosynthetic Membranes, Evan LaBrant, Allison C. Barnes, Rebecca Roston 2018 University of Nebraska–Lincoln

Lipid Transport Required To Make Lipids Of Photosynthetic Membranes, Evan Labrant, Allison C. Barnes, Rebecca Roston

Biochemistry -- Faculty Publications

Photosynthetic membranes provide much of the usable energy for life on earth. To produce photosynthetic membrane lipids, multiple transport steps are required, including fatty acid export from the chloroplast stroma to the endoplasmic reticulum, and lipid transport from the endoplasmic reticulum to the chloroplast envelope membranes. Transport of hydrophobic molecules through aqueous space is energetically unfavorable and must be catalyzed by dedicated enzymes, frequently on specialized membrane structures. Here, we review photosynthetic membrane lipid transport to the chloroplast in the context of photosynthetic membrane lipid synthesis. We independently consider the identity of transported lipids, the proteinaceous transport components, and membrane ...


Autohydrolysis Pretreatment Of Mixed Lignocellulosic Biomass, Claudio Lira 2018 The University of Western Ontario

Autohydrolysis Pretreatment Of Mixed Lignocellulosic Biomass, Claudio Lira

Electronic Thesis and Dissertation Repository

Lignocellulosic biomass, such as agricultural and forestry residues, can be transformed into valuable fuels and chemicals. However, the high cost of feedstock handling and the complex nature of cellulosic biomass processing and conversion remain two major challenges in biorefineries. This thesis aims to tackle these challenges by assessing the transformation of multi-feedstock using autohydrolysis pretreatment.

Corn cobs and stover (residues from corn processing), poplar chips (forestry residue), bagasse and wheat straw (agricultural residues) are abundant and often under-utilized cellulosic residues. These feedstocks were used to investigate the effects of biomass characteristics on the composition of the autohydrolysis pretreatment products. Moreover ...


Investigation On The Effect Of Pasteurisation On The Bacteria Contamination Of Eggs, Alya Sufiyah Bte Mohamed Subhan 2018 School of Science and Technology

Investigation On The Effect Of Pasteurisation On The Bacteria Contamination Of Eggs, Alya Sufiyah Bte Mohamed Subhan

The International Student Science Fair 2018

This project is a research on bacteria contamination on pasteurised and non-pasteurised eggs. In Singapore, there has been an increase in salmonella cases since 2016. Recently in the US, more than 206 million eggs in supermarkets and grocery chains had to be recalled. This project will explain about the different in bacterial colonies found on seemingly similar eggs.


Mapping Molecular Datasets Back To The Brain Regions They Are Extracted From: Remembering The Native Countries Of Hypothalamic Expatriates And Refugees, Arshad M. Khan, Alice H. Grant, Anais Martinez, Gully APC Burns, Brendan S. Thatcher, Vishwanath T. Anekonda, Benjamin W. Thompson, Zachary S. Roberts, Daniel H. Moralejo, James E. Blevins 2018 University of Texas at El Paso

Mapping Molecular Datasets Back To The Brain Regions They Are Extracted From: Remembering The Native Countries Of Hypothalamic Expatriates And Refugees, Arshad M. Khan, Alice H. Grant, Anais Martinez, Gully Apc Burns, Brendan S. Thatcher, Vishwanath T. Anekonda, Benjamin W. Thompson, Zachary S. Roberts, Daniel H. Moralejo, James E. Blevins

Arshad M. Khan, Ph.D.

This article, which includes novel unpublished data along with commentary and analysis,
focuses on approaches to link transcriptomic, proteomic, and peptidomic datasets mined from
brain tissue to the original locations within the brain that they are derived from using digital atlas
mapping techniques. We use, as an example, the transcriptomic, proteomic and peptidomic
analyses conducted in the mammalian hypothalamus. Following a brief historical overview, we
highlight studies that have mined biochemical and molecular information from the hypothalamus
and then lay out a strategy for how these data can be linked spatially to the mapped locations in a
canonical brain atlas ...


Endometrial Response To Conceptus-Derived Estrogen And Interleukin-1Β At The Time Of Implantation In Pigs, Hakhyun Ka, Heewon Seo, Yohan Choi, Inkyu Yoo, Jisoo Han 2018 Yonsei University, South Korea

Endometrial Response To Conceptus-Derived Estrogen And Interleukin-1Β At The Time Of Implantation In Pigs, Hakhyun Ka, Heewon Seo, Yohan Choi, Inkyu Yoo, Jisoo Han

Obstetrics and Gynecology Faculty Publications

The establishment of pregnancy is a complex process that requires a well-coordinated interaction between the implanting conceptus and the maternal uterus. In pigs, the conceptus undergoes dramatic morphological and functional changes at the time of implantation and introduces various factors, including estrogens and cytokines, interleukin-1β2 (IL1B2), interferon-γ (IFNG), and IFN-δ (IFND), into the uterine lumen. In response to ovarian steroid hormones and conceptus-derived factors, the uterine endometrium becomes receptive to the implanting conceptus by changing its expression of cell adhesion molecules, secretory activity, and immune response. Conceptus-derived estrogens act as a signal for maternal recognition of pregnancy by changing the ...


Evaluating Plant Root Uptake Of Dsrna For Application In Pest Management, Kaitlyn Ludba 2018 The University of Western Ontario

Evaluating Plant Root Uptake Of Dsrna For Application In Pest Management, Kaitlyn Ludba

Electronic Thesis and Dissertation Repository

The greenhouse whitefly Trialeurodes vaporariorum is an agricultural pest that damages crops by feeding on plant sap and by vectoring plant viruses. Control of whiteflies has been managed through application of insecticides, but this strategy is not entirely effective and alternative control strategies are needed. In this thesis, I evaluated the efficacy of RNA interference as a means to control whiteflies on greenhouse-grown tomatoes. I found that root uptake of dsRNA synthesized from the v-ATPase subunit A gene caused significant gene knock-down and mortality in feeding whiteflies. This effect was, however, sensitive to the concentration of dsRNA delivery, and concentration ...


Mechanism Of Virus Inactivation By Cold Atmospheric-Pressure Plasma And Plasma-Activated Water, Li Guo, Ruobing Xu, Lu Gou, Zhichao Liu, Yiming Zhao, Dingxin Liu, Lei Zhang, Hailan Chen, Michael G. Kong 2018 Old Dominion University

Mechanism Of Virus Inactivation By Cold Atmospheric-Pressure Plasma And Plasma-Activated Water, Li Guo, Ruobing Xu, Lu Gou, Zhichao Liu, Yiming Zhao, Dingxin Liu, Lei Zhang, Hailan Chen, Michael G. Kong

Bioelectrics Publications

ABSTRACT Viruses cause serious pathogenic contamination that severely affects the environment and human health. Cold atmospheric-pressure plasma efficiently inactivates pathogenic bacteria; however, the mechanism of virus inactivation by plasma is not fully understood. In this study, surface plasma in argon mixed with 1% air and plasma-activated water was used to treat water containing bacteriophages. Both agents efficiently inactivated bacteriophages T4, ϕ174, and MS2 in a time-dependent manner. Prolonged storage had marginal effects on the antiviral activity of plasma-activated water. DNA and protein analysis revealed that the reactive species generated by plasma damaged both nucleic acids and proteins, consistent with the ...


Effect Of Bioaugmentation Product Biowish® Aqua™ On Nitrogen Removal In Wastewater, Patrick Cassidy Kalvass 2018 California Polytechnic State University, San Luis Obispo

Effect Of Bioaugmentation Product Biowish® Aqua™ On Nitrogen Removal In Wastewater, Patrick Cassidy Kalvass

Master's Theses and Project Reports

Biological nutrient removal (BNR) from wastewater, and specifically nitrogen removal, is a growing concern to wastewater dischargers such as municipalities. Excess nutrients in effluent can create problems such as eutrophication, toxicity to aquatic life, and dissolved oxygen depletion in receiving waters. BNR systems have been installed in many locations with success, but their operation presents operational and financial demands greater than conventional biological treatment. Nitrogen removal is typically performed in sequential autotrophic nitrification and denitrification, which increases needed energy input, operational complexity, and therefore cost. Simultaneous nitrification-denitrification (SNdN) achieved in a single system has also been successfully implemented, however operational ...


Exploiting Click-Chemistry And Microfluidics To Map The Neuronal Itinerary Of App Processing And Amyloid-Beta Generation, Namratha Srinivas 2018 Washington University in St. Louis

Exploiting Click-Chemistry And Microfluidics To Map The Neuronal Itinerary Of App Processing And Amyloid-Beta Generation, Namratha Srinivas

Engineering and Applied Science Theses & Dissertations

Alzheimer’s disease (AD) is a chronic neurodegenerative disease and is the sixth leading cause of death in the United States with approximately 5.5 million Americans diagnosed with it. The neuropathological hallmark includes extracellular senile plaques and intraneuronal neurofibrillary tangles. Recent GWAS studies have identified genes associated with AD, and have revealed several classes of genes implicated in disease pathogenesis. In particular, three general pathways associated with an increased risk of AD included: 1) cholesterol metabolism, innate immune system, and the membrane trafficking. Our lab has focused on intracellular trafficking as it relates to the processing of amyloid precursor ...


Development Of Lc-Ms For The Identification And Characterization Of Non-Adjacent Dna Photoproduct Formation In G-Quadruplex Forming Sequences, Claudia Posadas 2018 Washington University in St. Louis

Development Of Lc-Ms For The Identification And Characterization Of Non-Adjacent Dna Photoproduct Formation In G-Quadruplex Forming Sequences, Claudia Posadas

Arts & Sciences Electronic Theses and Dissertations

Ultraviolet light is well known to induce cyclobutane pyrimidine dimers (CPD) and pyrimidine (6–4) pyrimidone photoproducts in duplex DNA, which interfere with DNA replication and transcription. Recently, a new class of DNA photoproducts known as anti cyclobutanepyrimidine dimers have been discovered, which form in G-quadruplex forming sequences in solution. G-quadruplex structures have been proposed to form in human DNA telomeres and certain promoters in vivo but evidence for their existence has been lacking. Since anti-cyclobutante pyrimidine dimers have been shown to form in G-quadruplex forming sequences, their formation in irradiated human cells could be used to confirm the ...


The Use Of Potato (Solanum Tuberosum) Suspension Cells For Rapid Screening Of Chloroplast Transformation Vectors, Lindsey Shover 2018 University of Tennessee, Knoxville

The Use Of Potato (Solanum Tuberosum) Suspension Cells For Rapid Screening Of Chloroplast Transformation Vectors, Lindsey Shover

EURēCA: Exhibition of Undergraduate Research and Creative Achievement

Chloroplast genetic engineering is unique in that it allows for high levels of gene expression while providing a means of natural bio-confinement. Although the chloroplast genome sequence of over 800 plant species is known, the elements that naturally regulate chloroplast gene expression are poorly understood. Recently, our lab has developed a 264 part modular cloning kit that contains known chloroplast regulatory elements. This kit can be used for the construction of novel chloroplast transformation cassettes; however, functional testing of these cassettes is currently hindered by standard chloroplast transformation technologies. Therefore, the aim of this experiment was to develop a rapid ...


The Effect Of Compound L19 On Human Colorectal Cells (Dld-1), Sepideh Mohammadhosseinpour 2018 Stephen F. Austin State University

The Effect Of Compound L19 On Human Colorectal Cells (Dld-1), Sepideh Mohammadhosseinpour

Electronic Theses and Dissertations

Colorectal cancer is the third most common type of cancer in the world and the second leading cause of death among humans. Extracts of water soluble compounds from the roots and leaves of Rumex crispus were screened for compounds that induced apoptosis in DLD-1 cells. A compound referred to as L19 was isolated using Accelerated Solvent Extraction (ASE) followed by High Performance Liquid Chromatography (HPLC). Gas chromatography coupled with mass spectrometry was used to identify the L19 as a tetrahydrofuran with a molecular weight of 72.11 g/mole. Each HPLC fraction resulted in 94.4% purity. In the present ...


An Examination Of Mhc, Peptide, And Tcr Interactions, Peter Trenh 2018 University of Massachusetts Medical School

An Examination Of Mhc, Peptide, And Tcr Interactions, Peter Trenh

GSBS Dissertations and Theses

T cell receptors (TCR) bind to peptides from various sources on MHC (Major Histocompatibility Complex) molecules. A long-standing goal in the field is to understand the mechanisms of MHC-peptide exchange and MHC-TCR interactions. Here, I present work from three uniquely different systems that address the following: HLA-DR1 conformational stability, self-tolerant mechanisms of TCRs isolated from self-reactive TCR transgenic mice, and TCR cross-reactivity mechanisms between LCMV and VV.

First, I present a crystal structure of HLA-DR1 in complex with A1L9 peptide, a peptide with two amino acid substitutions from the parental peptide. The singly substituted A1 peptide, which has a pocket ...


Same-Sex Marriage And The Baby Carriage: A Post-Obergefell Analysis Of Art Funding For Same-Sex Couples In The United States, Charmaine Mech 2018 University of Georgia School of Law

Same-Sex Marriage And The Baby Carriage: A Post-Obergefell Analysis Of Art Funding For Same-Sex Couples In The United States, Charmaine Mech

Georgia Journal of International & Comparative Law

No abstract provided.


Evolution Of Bordetella Pertussis Genome May Play A Role In The Increased Rate Of Whooping Cough Cases In The United States, Kevin Loftus 2018 James Madison University

Evolution Of Bordetella Pertussis Genome May Play A Role In The Increased Rate Of Whooping Cough Cases In The United States, Kevin Loftus

Senior Honors Projects, 2010-current

Bordetella pertussis is the bacterium responsible for pertussis, a disease commonly referred to as whooping cough. Recently, pertussis has made a resurgence in the U.S. despite high-vaccination coverage. Possible causes of the increased number of pertussis cases include genetic evolution of B. pertussis, increased awareness of the disease, better laboratory diagnostics, and the switch from a whole-cellular (wP) vaccine to an acellular vaccine (aP) in the 1990s. Fortunately, just as B. pertussis is evolving, so is the arsenal of technologies used to understand and combat this pathogenic bacterium. Whole genome sequencing is one technology that helps researchers better understand ...


Identifying A B. Thuringiensis Var. Kurstaki Receptor Binding Protein For Bacteriophage Riley, Rachel Carson 2018 James Madison University

Identifying A B. Thuringiensis Var. Kurstaki Receptor Binding Protein For Bacteriophage Riley, Rachel Carson

Senior Honors Projects, 2010-current

With the rapid emergence of antibiotic resistant bacteria affecting people around the world, research into new therapies using bacteriophages (phages) is increasing in the United States. Phages are viruses that can only infect bacteria and are able to co-evolve alongside the bacteria they infect. A researchers’ ability to pinpoint which phage to use in the therapy is important to combat an infection effectively. To do so, the genes that control the interaction between phages and the bacteria they infect, such as receptor binding proteins on the surface of a bacterial cell, need to be identified. Transposon mutagenesis was used in ...


Ketone Bodies And Signaling In Pancreatic Cancer Cell Lines, Kyla B. Buettner, Pankaj K. Singh, Surendra K. Shukla 2018 University of Nebraska at Omaha

Ketone Bodies And Signaling In Pancreatic Cancer Cell Lines, Kyla B. Buettner, Pankaj K. Singh, Surendra K. Shukla

Theses/Capstones/Creative Projects

Pancreatic cancer is the fourth leading cause of cancer-related deaths in the United States, and 95% of these cases are caused by PDAC (pancreatic ductal adenocarcinoma). Ketone bodies have previously been shown to decrease cell proliferation and cancer-induced cachexia. The molecular mechanism of ketone body-mediated growth inhibition of pancreatic cancer cells is not well understood. Research conducted thus far has not explored which molecular pathways are affected by ketone body treatment in pancreatic cancer cells. In the current study, the effect of the ketone body sodium hydroxybutyrate on the JAK-STAT and mTOR pathways and cell migration was explored. A decrease ...


Assessment Of Resistance To Botrytis Cinerea In Arabidopsis Expressing Grapevine Sts Genes And Analysis Of New Grapevine Vein Clearing Virus Isolates, Li Su 2018 Missouri State University

Assessment Of Resistance To Botrytis Cinerea In Arabidopsis Expressing Grapevine Sts Genes And Analysis Of New Grapevine Vein Clearing Virus Isolates, Li Su

MSU Graduate Theses

Grapevine stilbene synthase gene (STS) family is unusually large with more than 32 members of full-length genes. Resveratrol and piceid are synthesized in VaSTS7-, VvSTS22-, VaSTS22-transgenic Arabidopsis. To study the function of these STS genes in the resistance against Botrytis cinerea in vivo, lesion sizes on these STS transgenic Arabidopsis were compared to that on non-transgenic control Col-0, at 96 hours post inoculation with B. cinerea spores at 0, 200, or 1,000 spores/μl. In each experiment there were three biological replicates. Three lesion sizes from each replicate were averaged. The experiment was repeated three times. The results ...


Optimizing Genetic Manipulation Of Methanogens Through Faster Cloning Techniques, Merrisa Jennings 2018 University of Arkansas, Fayetteville

Optimizing Genetic Manipulation Of Methanogens Through Faster Cloning Techniques, Merrisa Jennings

Biological and Agricultural Engineering Undergraduate Honors Theses

Methanogenesis is the biological production of methane. Only anaerobic archaea known as methanogens are capable of such a metabolic feat. They have strict living conditions and substrate sources which determine their rate of metabolism. This is of particular importance from a greenhouse gas reduction perspective or biogas capturing perspective. One of the best ways to optimize methanogen methane production is via genetic manipulation. The current procedures are timely though, therefore a faster cloning processes should be developed. The objective of this study was to optimize a premade genetic transformation kit known as the Gibson Kit. The Gibson Kit was supposed ...


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