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Full-Text Articles in Life Sciences

Effects Of Predator Management And Parasitism On Over-Water Nesting Diving Duck Production In Southwestern Manitoba, Trenton E. Rohrer Jan 2021

Effects Of Predator Management And Parasitism On Over-Water Nesting Diving Duck Production In Southwestern Manitoba, Trenton E. Rohrer

Electronic Theses and Dissertations

Nest survival of upland nesting waterfowl (e.g., mallard [Anas platyrhynchos], blue-winged teal [Anas discors]) has been studied extensively in the Prairie Pothole Region (PPR) of North America. Conversely, over-water nesting diving ducks’ nest survival is poorly understood, likely because over-water nests are more challenging to find, may be less concentrated, and searching for these nests is physically demanding. Nest depredation is considered a leading cause of duck nest failure and is considered a limiting factor on upland nesting waterfowl production in the PPR. Similar factors limiting upland nesting duck production may limit over-water nesting duck productivity, but studies of this …


Identification And Characterization Of Modulators Of Human Mrp1 (Abcc1) And Human Mrp2 (Abcc2) Expression, Vivian Osei Poku Jan 2021

Identification And Characterization Of Modulators Of Human Mrp1 (Abcc1) And Human Mrp2 (Abcc2) Expression, Vivian Osei Poku

Electronic Theses and Dissertations

ATP-binding cassette (ABC) transporters are known to play a critical role in conferring multidrug resistance (MDR) in various cancers. Several retrospective analyses of chemotherapy results have reported high expression of Multidrug Resistance Protein 1 (MRP1) and Multidrug Resistance Protein 2 (MRP2) in tumor cells exhibiting the MDR phenotype. High MRP1 and MRP2 expression in cancer patients predict a higher risk of treatment failure, resulting in relapse and disease recurrence as well as shortened survival rates. The key role of MRP1 and MRP2 play in the development of MDR makes them important therapeutic targets that hold a great promise for addressing …


Using New And Long-Term Multi-Scale Remotely Sensed Data To Detect Recurrent Fires And Quantify Their Relationship To Land Cover/Use In Indonesian Peatlands, Yenni Vetrita Jan 2021

Using New And Long-Term Multi-Scale Remotely Sensed Data To Detect Recurrent Fires And Quantify Their Relationship To Land Cover/Use In Indonesian Peatlands, Yenni Vetrita

Electronic Theses and Dissertations

Indonesia has committed to reducing its greenhouse gases emissions by 29% (potentially up to 41% with international assistance) by 2030. Achieving those targets requires many efforts but, in particular, controlling the fire problem in Indonesia’s peatlands is paramount, since it is unlikely to diminish on its own in the coming decades. This study was conducted in Sumatra and Kalimantan peatlands in Indonesia. Four MODIS-derived products (MCD45A1 collection 5.1, MCD64A1 (collection 5.1 and 6), FireCCI51) were initially assessed to explore long-term fire frequency and land use/cover change relationships. The results indicated the product(s) could only detect half of the fires accurately. …


Exploring Quantitative Trait Loci Mapping For Bud Fruitfulness And Bud Break Traits In Grapevine F2 Population, Seyma Bozkus Jan 2021

Exploring Quantitative Trait Loci Mapping For Bud Fruitfulness And Bud Break Traits In Grapevine F2 Population, Seyma Bozkus

Electronic Theses and Dissertations

Grapevine (Vitis vinifera L. subsp. vinifera) is one of the most important and valuable fruit crops around the world and grape industries in the USA have been growing increasingly regarding the demand for highly productive and quality grapes that can be grown in the cold region around the USA. The development of new cultivars with these features is performed through grape breeding with the help of quantitative trait loci (QTL) mapping, marker-assisted selection (MAS), and and other technologies. In this study, we evaluated grapevine bud fruitfulness by position and bud break in controlled conditions. These traits are multi-genetic and understanding …


Characterization Of Cucurbitacin-Inspired Estrone Analogues As Novel Inhibitors Of Human Atp- Binding Cassette Proteins (Abcb1 And Abcc1), Jennifer Kyeremateng Jan 2021

Characterization Of Cucurbitacin-Inspired Estrone Analogues As Novel Inhibitors Of Human Atp- Binding Cassette Proteins (Abcb1 And Abcc1), Jennifer Kyeremateng

Electronic Theses and Dissertations

ATP-binding cassette (ABC) transporters are a large class of integral membrane proteins that contribute to key physiological functions in all organisms by utilizing ATP binding and hydrolysis to transport diverse substrates across membrane barriers. P-glycoprotein (P-gp/ ABCB1) and Multidrug Resistance protein 1 (MRP1/ABCC1) are widely reported ABC transporters associated with multidrug resistance in cancer. Multidrug resistance (MDR) mediated by P-gp and MRP1 is responsible for treatment failures of many metastatic cancers as a result of reduced accumulation, bioavailability and diminished potency of anticancer drugs. Currently, known P-gp and MRP1 inhibitors are limited due to toxicity, lack of selectivity and low …


Traditional And Local Food Procurement Motivators, Barriers, And Desires From Foodservice Directors In South Dakota Schools With High Enrollments Of Native American Students, Anna Barr Jan 2021

Traditional And Local Food Procurement Motivators, Barriers, And Desires From Foodservice Directors In South Dakota Schools With High Enrollments Of Native American Students, Anna Barr

Electronic Theses and Dissertations

Purpose/Objectives: The objectives of the study were two-fold: 1) Determine the motivators and barriers to local food and local traditional food procurement among Food Service Directors (FSDs) of South Dakota (SD) schools serving Native American (NA) students, and 2) determine what traditional foods are desired for local procurement by the same population.
Methods: A cross-sectional survey design was used. An online survey was emailed to SD FSDs at 42 schools with high enrollments NA students. Eligibility was determined by 1) participation in National School Lunch Program (NSLP), and 2) >50% enrollment NA students. Motivators and barriers were determined by averaging …


Assaying Bacillus Amyloliquefaciens Isolates 1ba And 1d3 For Biosurfactant Production And Utilization Of Petroleum Hydrocarbons And Phenolic Acids, Pavan Kulkarni Jan 2021

Assaying Bacillus Amyloliquefaciens Isolates 1ba And 1d3 For Biosurfactant Production And Utilization Of Petroleum Hydrocarbons And Phenolic Acids, Pavan Kulkarni

Electronic Theses and Dissertations

Several Bacillus amyloliquefaciens isolates obtained from wheat residue have been studied as biological agents to control wheat diseases. Notable traits of isolates 1BA and 1D3 include growth with high salt (10% NaCl), at temperatures up to 50°C and over a wide pH range. BIOLOG Gen III plates were used to study and further characterize Bacillus amyloliquefaciens 1BA and 1D3. Both isolates showed tolerance to high salt concentration supporting previous studies. They also grew in the presence of lithium chloride, potassium tellurite, and sodium bromate. Both isolates grew at pH 5, with almost identical carbon source utilization fingerprints. However, D-serine, quinic …


Influence Of Cover Crops On Water And Nutrient Cycles In South Dakota, Sam Ireland Jan 2021

Influence Of Cover Crops On Water And Nutrient Cycles In South Dakota, Sam Ireland

Electronic Theses and Dissertations

A major concern of farmers implementing cover crops into a crop rotation is a potential reduction in soil moisture and nutrients available for the following cash crop. If soil moisture or nutrients are limited, the following cash crop yield suffers. One option to conserve soil moisture is to terminate cover crops with herbicides prior to a killing freeze. The purpose of this study is to develop a better understanding of the impact of cover crops and termination timing to the water and nutrient cycles and furthermore, the agronomic impact to the following cash crop (corn). Field experiments were conducted in …


Investigating The Development Of Fecal Bacterial Communities In Growing Dairy Calves, Emily Fowler Jan 2021

Investigating The Development Of Fecal Bacterial Communities In Growing Dairy Calves, Emily Fowler

Electronic Theses and Dissertations

The gut development of young calves is crucial for the producer and the calf's future. Many factors can affect the development of a young calf's gastrointestinal system, and there has been little research into the fecal microbiome development of calves from 0 to 12 weeks of age. To gain further insight into this process, development of the fecal microbiome in 12 dairy calves was investigated. Fecal bacterial composition was determined at four time points (weeks 0, 4, 8 and 12) using the 16S rRNA gene through PCR-amplification of the V1-V3 regions from fecal microbial genomic DNA, followed by Illumina MiSeq …


College Of Natural Sciences 2021 Year-End Publication, College Of Natural Sciences Jan 2021

College Of Natural Sciences 2021 Year-End Publication, College Of Natural Sciences

College of Natural Sciences Newsletters and Reports

Page 2 Welcome, Table of Contents
Page 3 Our Departments: Highlights From 2021
Page 4 Overview of the College
Page 5 Overview of Bold & Blue
Pages 6, 7 Announcing the First Endowed Professorship in the College of Natural Sciences
Page 8 Spooky Science, Astronomy Outreach, SDSU Chemistry Research Features on Journal Cover
Page 9 Students Win Business Plan Competition With Aims to Improve Shelf Life of Produce, Summer Researchers
Page 10 NIH Grant Helps Unravel Rare Inflammatory Genetic Disorders, International Excellence in South Dakota
Page 11 The Next Frontier of Science Education: Virtual Reality, SDSU Researchers Uncover how Cancer …


Polycystic Kidney Disease: An Examination And Review Of Disease Type, Presentation, Treatment, And Prognosis, Zoey Mann Jan 2021

Polycystic Kidney Disease: An Examination And Review Of Disease Type, Presentation, Treatment, And Prognosis, Zoey Mann

Biology and Microbiology Graduate Students Plan B Research Projects

Polycystic Kidney Disease (PKD) is a ciliopathy that primarily presents as renal cysts. Inherited as either a dominant (ADPKD) or recessive (ARPKD) mutation, PKD is one of the most commonly inherited kidney diseases. ADPKD is caused by the inheritance of a mutation in either PKD1 or PKD2, which code for the polycystin-1 and -2 proteins, respectively. The less severe form of PKD, ADPKD is typically adult-onset, with the possibility of extremely late-stage presentation. In addition to renal cysts, hepatic and pancreatic cysts are common, as well as other non-cystic symptoms including headache and hypertension. ARPKD is caused by the inheritance …


Guillain-Barre Syndrome: A Review Of Current Diagnostic Tools, Treatments, And Research, Kaitlyn Hespen Jan 2021

Guillain-Barre Syndrome: A Review Of Current Diagnostic Tools, Treatments, And Research, Kaitlyn Hespen

Biology and Microbiology Graduate Students Plan B Research Projects

Guillain-Barre Syndrome is a rare post-infection inflammatory disorder. It is caused by the cross-reactivity of antibodies produced from a recent infection which then attack the gangliosides of the peripheral nervous system. Guillain-Barre syndrome includes multiple subtypes which are categorized based on both disease course and symptoms, which include length of progression phase, pain, and cranial nerve involvement. This paper will serve as a review of diagnostic tools and treatment options used for Guillain-Barre syndrome patients. It will also discuss recent research on these topics as well as studies on viral outbreaks which may be linked to Guillain-Barre syndrome. These will …


Current And Future Perspectives In The Treatment Of Fracture Nonunions, Zebadiah Nelson Jan 2021

Current And Future Perspectives In The Treatment Of Fracture Nonunions, Zebadiah Nelson

Biology and Microbiology Graduate Students Plan B Research Projects

Fracture nonunions comprise one of the serious clinical complications in orthopedics. Fracture nonunions result when the time to union is greater than 6 to 9 months. It is estimated that approximately 5% to 10% of all fractures progress to fracture nonunion due to a host of complicating patient variables and risk factors. New scoring systems have emerged which help in directing the treatment strategies. Fracture nonunion management should be directed toward maintaining the diamond concept which introduces osteogenic cells lines, an osteoconductive scaffold for those cells to grow, as well as the necessary growth factors, and a stable mechanical microenvironment. …


Association Between Colorectal Cancer Prevalence And Patients Age, Race And Sex, Arsiema Fisuh Jan 2021

Association Between Colorectal Cancer Prevalence And Patients Age, Race And Sex, Arsiema Fisuh

Biology and Microbiology Graduate Students Plan B Research Projects

Colorectal cancer is one of the top leading causes of cancer deaths affecting people of different ages, sex and races disproportionately. The American Cancer society researchers have studied that lack of physical activities, smoking, consumption of red meat, and heavy alcohol use to be high risk factors for developing colorectal cancer in addition to genetic inheritances. Previous research studies have shown that disparities in cancer screening, socioeconomic status and others impacts on colorectal cancer prevalence and death. The objective of this project is to review the existing literature to better understand the disparities in colorectal cancer prevalence and deaths in …


The Importance Of Care Coordination Of Patients With Multimorbidity: An Evaluation Of The Patient-Centered Medical Home Model, Mary Boksa Jan 2021

The Importance Of Care Coordination Of Patients With Multimorbidity: An Evaluation Of The Patient-Centered Medical Home Model, Mary Boksa

Biology and Microbiology Graduate Students Plan B Research Projects

The rise in multimorbidity among various patient populations has made fragmentation of care an increasingly common issue due to the need for specialized care of each chronic condition and complexity of treatment plans. Implementation of care coordination intervention models has been identified as an essential component in combating this fragmented nature of our current health care system. This is done by providing an organized model of care and improving communication between all parties involved in care and treatment plans. This literature review will begin with a brief discussion on the importance of care coordination and components needed for implementation and …


The Relationship Between Land Use Change And Disease Prevalence, Allison Bjornstad Jan 2021

The Relationship Between Land Use Change And Disease Prevalence, Allison Bjornstad

Biology and Microbiology Graduate Students Plan B Research Projects

Zoonotic disease outbreaks are becoming more novel and are increasing in frequency. This increase can be partially attributed to land use changes including deforestation, urbanization, and cultivation. Land use change alters disease prevalence by causing an increase in contact rates between disease hosts and humans. Land use changes also alter species compositions in the area to contain more competent disease hosts. Each pathogen can react to these changes in different ways. The specific reactions that each pathogen has to land use changes should be further researched so proper mitigation steps can be taken. Once the effects of land use change …


Evaluating Canola Genotypes For Growth And Yield Under Different Environmental Conditions In South Dakota, Unius Arinaitwe Jan 2021

Evaluating Canola Genotypes For Growth And Yield Under Different Environmental Conditions In South Dakota, Unius Arinaitwe

Electronic Theses and Dissertations

Canola (Brassica napus L) and carinata (Brassica carinata A. Braun) are potential oilseed crops for diversifying cropping systems and expanding into marginal lands impacted by saline and sodic soils in South Dakota (SD). However, genotypes that are high yielding, with high agronomic adaptability and stability over diverse environments, and salt tolerant have not been selected. One field experiment was conducted at two environments (Brookings - eastern SD and Pierre - western SD) from 2019 to 2020 to evaluate genotypes for growth and yield stability. Three greenhouse experiments were conducted to evaluate genotypes for salt tolerance in …


Developing Whey Protein Encapsulated Probiotics And Evaluating Environmental Listeria Using Whole-Genome Sequencing, Shayanti Minj Jan 2021

Developing Whey Protein Encapsulated Probiotics And Evaluating Environmental Listeria Using Whole-Genome Sequencing, Shayanti Minj

Electronic Theses and Dissertations

In this study, a novel value-added dairy-based health formulation was developed using whey protein hydrolysate and probiotic organisms. In the first part of the study, different forms of whey proteins, concentrate WPC80, isolate WPI90, and hydrolysates WPH10, WPH15 and WPH20 were screened for bioactivities (antimicrobial, antioxidant, and antihypertensive activity). Hydrolysate WPH10, exhibiting the highest bioactivities was conjugated with maltodextrin. A batch of 2L conjugated solution was spray dried in a Niro drier with an inlet and outlet temperature of 200⁰C and 90⁰C, and alternatively, freeze dried at −80 °C under 50 mTorr vacuum. The bioactivities of the conjugated samples were …


School Gardening In America And A Survey Of South Dakota Schools, Aminah Hassoun Jan 2021

School Gardening In America And A Survey Of South Dakota Schools, Aminah Hassoun

Electronic Theses and Dissertations

School gardening has a longstanding history in American education, dating as far back as the mid-1800s. Despite fluctuations in popularity throughout the twentieth century, school gardens have grown into an established method for hands-on teaching. This paper builds upon a historical framework of school gardening in American public education with particular focus on the connections between school gardens and agricultural education. This study offers a descriptive portrait of contemporary K-12 school gardens in South Dakota. Schools across the state were surveyed about their gardens to gain a better understanding of garden-based teaching in practice both in general education and agricultural …


An Integrative Analysis On The Role Of Notch1 And Notch3 In Musculoskeletal Disease, Haydee Magdalena Torres Jan 2021

An Integrative Analysis On The Role Of Notch1 And Notch3 In Musculoskeletal Disease, Haydee Magdalena Torres

Electronic Theses and Dissertations

Notch signaling is an evolutionarily conserved signaling pathway involved in cell fate decisions and cell renewal of multiple systems, including skeletal and muscle homeostasis. As the multifunctional nuclear complex of Notch1 is essential for its pathological function, identifying these interacting partners represents a potentially broad range of druggable vulnerabilities. We have completed a BioID proteomics study and found a large set of nuclear proteins associated with NOTCH1, including transcriptional regulators and epigenetic modulators, of which Histone Deacetylase 1 (HDAC1) is a promising interacting partner of Notch1. Our Cytoscape analysis predicted HDAC1 to be a top critical node in an activated …


Bio-Inspired Materials For Electrochemical Sensors, Matthew Joseph Hummel Jan 2021

Bio-Inspired Materials For Electrochemical Sensors, Matthew Joseph Hummel

Electronic Theses and Dissertations

Electrochemical biosensors are a rapidly growing research area that has greatly improved its specificity, accuracy, and precision in the detection of biomolecules in contemporary literature and industry alike. Typically, these systems exist in a three-electrode conformation with a working electrode functioning as the anode, a counter electrode functioning as the cathode, and a reference electrode allowing for the control of potential in the system. The method by which these sensors work is through the sharing of electrons via redox reactions with the target molecule and the working electrode or modifications on its surface. By exploiting the function of biomaterials that …


Cold Climate Grape Cultivar`S Physiological And Gene Expression Responses To Low And Freezing Temperatures, Turhan Yilmaz Jan 2021

Cold Climate Grape Cultivar`S Physiological And Gene Expression Responses To Low And Freezing Temperatures, Turhan Yilmaz

Electronic Theses and Dissertations

Grapevine (Vitis Vinifera), widely cultivated in the world and USA, is a significant and valuable fruit crop. After cold climate grapevine cultivars were released by breeding programs in the 1990s, the production of grapes expanded in the Northern cold climate region of the US. The objectives of this study were to test 1) freezing tolerance and chilling fulfillment, 2) the effect of pruning methods on yield and winter survival, and 3) transcriptomic changes in natural and controlled chilling conditions during chilling requirement fulfillment in cold climate grapevine cultivars. Pruning methods, spur (SP), short cane (SC), and spur plus short cane …


An Exploration Of The Effects Of An Early Postpartum Intravenous Infusion With Carnosic Acid On Physiological Responses Of Transition Dairy Cows, Tainara Michelotti Jan 2021

An Exploration Of The Effects Of An Early Postpartum Intravenous Infusion With Carnosic Acid On Physiological Responses Of Transition Dairy Cows, Tainara Michelotti

Electronic Theses and Dissertations

The transition period is commonly defined as the last 3 wk before parturition to 3 wk after parturition. It is the most critical stage of the lactation cycle of high-producing dairy cows. The period consists of a complex interplay of metabolic and hormonal adaptations, inflammation, and immune activation. During the transition period, dairy cows commonly face oxidative stress, an underlying factor for dysfunctional immune response and enhanced inflammation, which can further increase the susceptibility of dairy cattle to health disorders and decrease productivity. In the last few decades, there has been an increased interest in studying alternative natural compounds with …


Auxin-Based Herbicide Program And Rhizobia Application For Weed Control And Nodulation Potential In Auxin Tolerant Soybean, Joy Amajioyi Jan 2021

Auxin-Based Herbicide Program And Rhizobia Application For Weed Control And Nodulation Potential In Auxin Tolerant Soybean, Joy Amajioyi

Electronic Theses and Dissertations

Foliar-applied Bradyrhizobia to V4 soybean has been reported to increase yield up to 5%. However, a stand-alone product application may not be practical. Applying with other treatments such as post-emergence herbicide application may be economical but herbicide and/or additives may be deleterious to rhizobial growth. A laboratory study investigated the impact of herbicides (glyphosate and dicamba), additives (an oil to improve absorption and spreading; and AMS used to overcome hard water impacts on glyphosate), and herbicide + additives on bacterial growth. Optical density (OD) measurements at the wavelength of 650 nm assessed solution turbidity, a surrogate measure of bacterial growth. …


Studies On Genetic Characterization Of Agronomic Traits And Disease Resistance In Bread Wheat, Jyotirmoy Halder Jan 2021

Studies On Genetic Characterization Of Agronomic Traits And Disease Resistance In Bread Wheat, Jyotirmoy Halder

Electronic Theses and Dissertations

A steady increase in wheat yield is vital to feed the continuously rising world population. Systematic exploitation of wheat germplasm and a better understanding of the underlying genetic control could be pivotal in accelerating the genetic gain for yield and disease management. Various modern techniques such as genome-wide association study (GWAS), genomic selection (GS), fine mapping, and cloning can expedite wheat improvement and broaden our understanding of the complex wheat genome. In the first objective of this study, we evaluated the Watkins core set of 121 landrace cultivars (LCs) to identify novel sources of resistance against the tan spot, Stagonospora …


Search For New Fertility Markers In Bull Sperm, Saulo Menegatti Zoca Jan 2021

Search For New Fertility Markers In Bull Sperm, Saulo Menegatti Zoca

Electronic Theses and Dissertations

Sperm are stored for extended periods of time in the epididymis, but upon ejaculation motility is increased and lifespan is decreased. After insemination, sperm must traverse the female barriers and undergo capacitation to complete fertilization; however, there are differences in fertility even among bulls that successfully pass a breeding soundness exam. For any potential marker of fertility, there must be variability expressed among animals. The series of studies in this dissertation had the objective 1) to evaluate differences between epididymal and ejaculated sperm and respective fluids proteins to understand increased longevity of epididymal sperm; 2) to evaluate the potential of …


Health & Nutritional Sciences Free Communication Day: Spring 2021 Plan B Abstracts, Brianna Vig, Michael Pappan, Taylor Svehla, Alexander Iverson, Tanner Jerome, Christian Gravius, Kaitlyn Jackman, Savannah Ratermann, Gwyneth Phillips, Jenna Rheder, Erin Hallenbeck, Logan Ammons, Rachel Astleford, Francine Hoffman, Ryan Folley, Kylie Serie, Jenna Christianson, Haley Strait, Kelsey Kessler Jan 2021

Health & Nutritional Sciences Free Communication Day: Spring 2021 Plan B Abstracts, Brianna Vig, Michael Pappan, Taylor Svehla, Alexander Iverson, Tanner Jerome, Christian Gravius, Kaitlyn Jackman, Savannah Ratermann, Gwyneth Phillips, Jenna Rheder, Erin Hallenbeck, Logan Ammons, Rachel Astleford, Francine Hoffman, Ryan Folley, Kylie Serie, Jenna Christianson, Haley Strait, Kelsey Kessler

Health and Nutritional Sciences Graduate Students Plan B Capstone Projects

This document contains Plan B abstracts presented by graduate students at the Health and Nutritional Sciences Free Communication Day, held on May 4th, 2021.

Abstract titles include:

  • Local Restaurants’ Marketing and Sponsorship Within Collegiate Athletics
  • Preparing the Future of Campus Recreation
  • Motivational Factors Influencing College Choice: NCAA Division I Female Volleyball Athletes
  • The Significance of a Successful Internship Program
  • Foundations of Publicly Subsidized Sport Stadiums: The Case of U.S. Bank Stadium
  • Enhancing Member Experience During a Pandemic
  • The Risk of Depression in Football Players Diagnosed with a Concussion
  • Effectiveness of Color-Tinted Glasses in Reducing Photophobia in Patients Diagnosed with Mild …


Development Of Bio-Based Nanocomposites For Biosensor And Indicator Applications In Smart Food Packaging, Abdus Sobhan Jan 2021

Development Of Bio-Based Nanocomposites For Biosensor And Indicator Applications In Smart Food Packaging, Abdus Sobhan

Electronic Theses and Dissertations

Smart food packaging based on biosensors has been attracting more and more interest to the industrial community because of the concerns of food quality and safety. A food packaging with biosensor has a scope to enable real-time monitoring of microbial breakdown products of packaged foods. Furthermore, one of the biggest challenges in implementing biosensor for smart packaging materials is the development of bio-sensing active materials that can leverage their electrical, thermal, biodegradable and other functional properties. In this regard, nanocellulose-based activated carbon (NAC) nanocomposite was developed using the activated carbon and nanocellulose gel using the casting method with their different …


Profiling Of Fda-Approved And Clinical Trial Drugs Revealed Shared Cytotoxicity And Collateral Sensitivity In Resistant (H69ar) And Non-Resistant (H69) Small Cell Lung Cancer Cells. (Drug Repurposing In Cancer Chemotherapy), Pius Reyderg Agyemang Jan 2021

Profiling Of Fda-Approved And Clinical Trial Drugs Revealed Shared Cytotoxicity And Collateral Sensitivity In Resistant (H69ar) And Non-Resistant (H69) Small Cell Lung Cancer Cells. (Drug Repurposing In Cancer Chemotherapy), Pius Reyderg Agyemang

Electronic Theses and Dissertations

Some cancers are capable of “spitting out” drugs being fed to them, metaphorically speaking, becoming resistant to what were previously effective chemotherapeutics. In small-cell lung cancer (SCLC), an overexpression of a membrane protein (MRP1) and its transport activity can lead to chemotherapy failure. However, this study showed that certain drugs are selectively cytotoxic (exhibit collateral sensitivity) to MRP1-overexpressed SCLC (H69AR) cells. In this study, three drugs (Erlotinib, Pyrimethamine, Fludarabine) were identified to exhibit a dose-dependent collateral sensitivity on H69AR with IC50 values of ~3.5 μM, ~2 μM, and ~20 μM respectively. Halting the transport activity of the MRP1 with 25 …


Free-Living Diazotrophs And The Nitrogen Cycle In Natural Grassland Revealed By Culture Dependent And Independent Approaches, Amrit Koirala Jan 2021

Free-Living Diazotrophs And The Nitrogen Cycle In Natural Grassland Revealed By Culture Dependent And Independent Approaches, Amrit Koirala

Electronic Theses and Dissertations

Biological nitrogen fixation contributes to half of the global supply of nitrogen to the biosphere. It is carried out by a diverse group of prokaryotes called diazotrophs via the nitrogenase enzyme. Nitrogen fixation research is focused on the narrow group of symbiotic diazotrophs, and the vast majority of free-living diazotrophs which contribute significantly to fixed nitrogen are yet to be explored. The goal of this research was to access phylogeny of diazotrophs considering the most up-to-date genomic information and apply that knowledge to understand the diversity of free-living diazotrophs in a natural grassland ecosystem, both by culture dependent and independent …