Digital Commons Network^™

Occurrence And Formation Of N-Dbps In Rhode Island Drinking Waters, Maxwell C. Meadows

Open Access Master's Theses

N-nitrosamines are toxic compounds that have persistently been associated with water treatment processes since the 1970’s. There are currently no federal regulations for N-nitrosamines in drinking water, however few states have established their own guidelines. Many studies have identified major mechanisms of N-nitrosamine formation during water treatment, however a gap in knowledge still exists regarding the formation of select N-nitrosamines from treatment of clean water sources. Performance of such critical research is often an expensive process, leaving many facilities and institutions resorting to other approaches for analysis. In the case of this research, efforts were made to develop a lower-cost, …

Molecular Mechanisms Of Protein Binding By Perfluoroalkyl Substances (Pfass), Michael Fedorenko

Open Access Master's Theses

Comparative investigation of the intermolecular chemical interaction (binding) between bovine serum albumin (BSA) and four polyfluoroalkyl substances (PFOA, PFNA, PFHxS, PFOS) by ¹⁹F NMR spectroscopy with synchronous observation of the ¹⁹F signals from both ends (head and tail) of the polyfluoroalkyl molecules was performed at three temperatures of 298K, 304K and 310K.

Chemical shifts of ¹⁹F NMR peaks in solutions of PFAS with BSA were used for evaluation of the dissociation constants, K_d, for both known mechanisms of PFAS binding with BSA: by hydrophobic interaction of the PFAS molecule tail with hydrophobic pockets in the …

Distinguishing Living And Non-Living Surface Deposition On Serptentine: Implications For Biosignatures And Astrobiology, Alexander Sousa

Open Access Master's Theses

Serpentinizing systems host long-lived reactions in which an ultramafic (or mafic) rock package, rich in reduced species, is progressively metamorphosed via hydration and oxidation into a serpentine-dominated mineral assemblage. On Earth, this process drives redox gradients in related water-rock systems: hydrogen gas is produced, reduced minerals are transformed to oxidized counterparts, and hydrocarbon chains (with potential to fuel chemosynthetic microbes) are released. The life sustaining capacity and abundance of serpentinite on/in silicate planetary bodies make such systems astrobiologically intriguing.

The Mars 2020 rover, equipped with a DUV Raman, is likely to explore serpentinite deposits (exposed selectively at crater rim sites) …

Development Of A Paper-Based Microfluidic Device For The Detection Of Orthophosphate In Water, Brenno Ribeiro

Open Access Master's Theses

Phosphate is an essential nutrient for plant life in water that when in abundance can have a series of adverse effects on an ecosystem. As such it is of great interest to scientists and environmentalists alike to detect phosphate in the environment. The current state of detection technology leaves much to be desired however as devices are insensitive, ineffective, and sometimes expensive. This study presents a series of methods, systems, and devices that were developed in the pursuit of advancing the state of detection of orthophosphate in water. A lab-on-chip device was created utilizing the molybdenum blue reaction with a …

The Role Of Childhood Trauma In The Associations Among Posttraumatic Stress Disorder, Emotional Reactivity, And Emotion Dysregulation: A Moderated Mediation Model, Svetlana Goncharenko

Open Access Master's Theses

A substantial body of research over the past decade underscores the role of emotion dysregulation in posttraumatic stress disorder (PTSD). Notably, however, this research has been limited in its lack of attention to factors that may influence (e.g., childhood trauma) or explain (e.g., emotional reactivity) the association of emotion dysregulation to PTSD and inform intervention efforts. The current study addresses these limitations by using a moderated mediation approach to examine the role of childhood trauma (i.e., moderator) in the associations among PTSD (i.e., independent variable), objective and subjective emotional reactivity (i.e., mediating variable), and emotion dysregulation (i.e., dependent variable). In …

Endometriosis: The Psychosocial And Emotional Lived Experience Of College-Aged Women, Brianna Graffia

Renée Crown University Honors Thesis Projects - All

No abstract provided.

Regulation Of Olfactory Behavior By Rnai Pathways In Caenorhabditis Elegans, Emma Walen

Renée Crown University Honors Thesis Projects - All

No abstract provided.

Academy Presidents And Institutional Members List, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

Occurrence Of The Sinus Nematode Skrjabingylus Sp. (Nematoda: Metastrongyloidea) Inferred From Sinus Lesions In Arkansas Mustelidae And Mephitidae, With Review Of Relevant Literature, C. Renn Tumlison, Terry Tumlison

Journal of the Arkansas Academy of Science

Nasal nematodes of the genus Skrjabingylus occur in the mammalian families Mustelidae and Mephitidae, and have been found from Canada to Costa Rica. Ingestion of infected snails, frogs, snakes, or mice can lead to infection of these mammalian hosts. Infection often causes pathology to bones in the sinus region, which may lead to discoloration, enlargement, and fenestrations of the bone. Examination of museum specimens for bone lesions or other evidence of infection has been used to evidence prior infection, but prevalence and intensity cannot be interpreted without actually recovering the parasite. We examined Mustelids and Mephitids in collections of mammals …

Distribution, Habitat, And Life History Aspects Of The Dwarf Crayfishes Of The Genus Cambarellus (Decapoda: Cambaridae) In Arkansas, Henry W. Robison, Chris T. Mcallister

Journal of the Arkansas Academy of Science

The dwarf crayfishes of the genus Cambarellus are represented in Arkansas by only 2 species: Cambarellus (Pandicambarus) puer (Hobbs) and C. (P.) shufeldtii (Faxon). Both species are quite small and uncommonly encountered in the state. Between 1972 and 2018, we made 368 crayfish collections throughout the 75 counties of Arkansas. A total of 34 collections (our collections, plus museum specimens), and those previously collected by Reimer (1963) yielded a total of 304 specimens of C. puer and 12 collections of C. shufeldtii returned 54 specimens of C. shufeldtiii. Herein, we document these …

Parasites (Trematoda, Nematoda, Phthiraptera) Of Two Arkansas Raptors (Accipitriformes: Accipitridae; Strigiformes: Strigidae), Chris T. Mcallister, Lance A. Durden, Charles R. Bursey, John A. Hnida, Vasyl V. Tkach, Tyler J. Achatz

Journal of the Arkansas Academy of Science

Very little is known about the helminth parasites of hawks and owls of Arkansas. We had the opportunity to salvage 2 road-killed raptors, a red-shouldered hawk (Buteo lineatus) and a great horned owl (Bubo virginianus) from the state and examine them for ecto- and endoparasites. Found were chewing lice (Degeeriella fulva) and a nematode (Porrocaecum angusticolle) on/in B. lineatus, and 3 digenean trematodes (Echinoparyphium sp., Strigea elegans, Neodiplostomum americanum), and nematode eggs (Capillaria sp.) in B. virginianus. We document 6 new distributional records for these parasites.

Observations Of An Alligator (Alligator Mississippiensis) Nest And Behavior Of Hatchlings In Clark County, With Anecdotal Observations Of Other Alligator Nests In Arkansas, Allison Surf, Kevin Nordengren, C. Renn Tumlison, Kelly Irwin

Journal of the Arkansas Academy of Science

Historically, the American alligator (Alligator mississippiensis) ranged through southern and much of eastern Arkansas. By the early 1900s, alligator populations had declined due to unregulated hunting, commercial exploitation, and habitat loss. In 1961, the Arkansas Game and Fish Commission (AGFC) established protection of this species, and in 1967 the U.S. Fish and Wildlife Service listed the alligator as an endangered species. The AGFC conducted a restocking program from 1972-1984, and the species made a full recovery in Arkansas. Still, little is known about reproductive biology in the state. We observed an alligator nest near Arkadelphia, Clark Co., the mound …

Photographic Record Of A Greater Roadrunner (Geococcyx Californianus) From Drew County, Arkansas, John L. Hunt, Christopher G. Sims

Journal of the Arkansas Academy of Science

No abstract provided.

Cotylogaster Occidentalis (Aspidogastrea: Aspidogastridae) From Freshwater Drum, Aplodinotus Grunniens (Actinopterygii: Sciaenidae), In Northeastern Oklahoma, Chris T. Mcallister, Anindo Choudhury

Journal of the Arkansas Academy of Science

No abstract provided.

Business Meeting Report (Secretary's And Treasurer's Report), Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

Journal Acknowledgments And Editorial Board, Academy Editors

Journal of the Arkansas Academy of Science

No abstract provided.

Changes In Expression Of The Autophagy-Related Genes Microtubule-Associated Protein 1 Light Chain 3Β And Autophagy Related 7 In Skeletal Muscle Of Fattening Japanese Black Cattle: A Pilot Study, Tomonori Nakanishi, Tadaaki Tokunaga, Takafumi Ishida, Ikuo Kobayashi, Yuta Katahama, Azusa Yano, Laurie Erickson, Satoshi Kawahara

Hebrew Theological College Publications and Research

Objective

Autophagy is a bulk degradation system for intracellular proteins which contributes to skeletal muscle homeostasis, according to previous studies in humans and rodents. However, there is a lack of information on the physiological role of autophagy in the skeletal muscle of meat animals. This study was planned as a pilot study to investigate changes in expression of two major autophagy-related genes, microtubule-associated protein 1 light chain 3β (MAP1LC3B) and autophagy related 7 (ATG7) in fattening beef cattle, and to compare them with skeletal muscle growth.

Methods

Six castrated Japanese Black cattle (initial body weight: 503±20 kg) were enrolled in …

Agroforestry Livelihood Strategies And Factors Influencing Agroforestry Adoption In Nakai Resettlement Villages, Khammouan Province, Lao Pdr, Khampasith Sengsouvan, Rowena Dt. Baconguis, Evelie P. Serrano, Ma. Lpurdes S. Edaño

Journal of Public Affairs and Development

The study characterized the agroforestry livelihood strategies of resettled communities and the economic benefits associated with these, discussed the socio-economic factors associated with the adoption of the agroforestry livelihood strategies, and examined the agroforestry livelihood strategies in relation to perceived food sufficiency. Data gathering methods employed were survey, key informant interviews, and transect walk. Randomly selected adopters of agroforestry served as main respondents. Data were analyzed through descriptive and inferential statistics. Results revealed that adopters practiced five different agroforestry livelihood strategies. Rice (Oryza sativa)-based livelihood strategies assured farmers of rice supply, vegetable-based provided the highest income, and pineapple (Ananas comosus)-based …

Mathematically Modeling The Role Of Triglyceride Production On Leptin Resistance, Yu Zhao, Daniel Burkow, Baojun Song

Department of Applied Mathematics and Statistics Faculty Scholarship and Creative Works

Diet-induced obesity is becoming more common all over the world, which is increasing the prevalence of obesity-induced chronic diseases such as diabetes, coronary heart disease, cancer, and sleep apnea. Many experimental results show that obesity is often associated with an elevated concentration of plasma leptin and triglycerides. Triglycerides inhibit the passage of leptin across the blood–brain barrier (BBB) to signal the hypothalamus to suppress appetite. However, it is still not clear how triglyceride concentration affects leptin transport across the BBB and energy balance. In this paper, we propose a novel ordinary differential equations model describing the role of leptin in …

Variations In The Abundance And Distribution Of Aggregates In The Ross Sea, Antarctica, Vernon L. Asper, Walker O. Smith

Faculty Publications

The vertical distribution and temporal changes in aggregate abundance and sizes were measured in the Ross Sea, Antarctica between 2002 and 2005 to acquire a more complete understanding of the mechanisms and rates of carbon export from the euphotic layer. Aggregate abundance was determined by photographic techniques, and water column parameters (temperature, salinity, fluorescence, transmissometry) were assessed from CTD profiles. During the first three years the numbers of aggregates increased seasonally, being much more abundant within the upper 200 m in late summer than in early summer from 50 to 100 m (12.5 L^–1 in early summer vs. 42.9 …

Proprietary Milk Protein Concentrate Reduces Joint Discomfort While Improving Exercise Performance In Non-Osteoarthritic Individuals, Tim N. Ziegenfuss, Chad M. Kerksick, A. William Kedia, Jennifer Sandrock, Betsy Raub, Hector L. Lopez

Faculty Scholarship

Milk and dairy products are known to contain various bioactives with potential anti-inflammatory and immune modulating effects. Previous research has indicated that milk produced from hyperimmunized cows provided meaningful health benefits to individuals suffering from varying degrees of osteoarthritis and rheumatoid arthritis. PURPOSE: To examine the impact of a proprietary milk protein concentrate on joint discomfort and physical function, exercise performance, quality of life and various measures of affect. METHODS: Non-osteoarthritic men (42.5 ± 8.9 years, 176.7 ± 6.7 cm, 89.9 ± 11.5 kg, 28.8 ± 3.5 kg/m2, n = 30) and women (46.4 ± 9.6 years, 163.1 ± 8.2 …

First Generation Amperometric Biosensing Of Galactose With Xerogel-Carbon Nanotube Layer-By-Layer Assemblies, Najwa Labban, Mulugeta B. Wayu, Ciara M. Steele, Tess S. Munoz, Julie A. Pollock, William S. Case, Michael C. Leopold

Chemistry Faculty Publications

A first-generation amperometric galactose biosensor has been systematically developed utilizing layer-by-layer (LbL) construction of xerogels, polymers, and carbon nanotubes toward a greater fundamental understanding of sensor design with these materials and the potential development of a more efficient galactosemia diagnostic tool for clinical application. The effect of several parameters (xerogel silane precursor, buffer pH, enzyme concentration, drying time and the inclusion of a polyurethane (PU) outer layer) on galactose sensitivity were investigated with the critical nature of xerogel selection being demonstrated. Xerogels formed from silanes with medium, aliphatic side chains were shown to exhibit significant enhancements in sensitivity with the …

Halogen Bonding Interactions For Aromatic And Non-Aromatic Explosive Detection, Arjun K. A. Jaini, Lillian B. Hughes, Michael K. Kitimet, Kevin John Ulep, Michael C. Leopold, Carol A. Parish

Chemistry Faculty Publications

Improved sensing strategies are needed for facile, accurate and rapid detection of aromatic and nonaromatic explosives. Density functional theory was used to evaluate the relative binding interaction energies between halogen-containing sensor model molecules and nitro-containing explosives. Interaction energies ranged from –18 to –14 kJ/mol and highly directional halogen bonding interactions were observed with bond distances ranging between 3.0 and 3.4 Å. In all geometry optimized structures, the sigma-hole of electropositive potential on the halogen aligned with a lone pair of electrons on the nitro-moiety of the explosive. The computational results predict that the strongest interactions will occur with iodine-based sensors …

2019-2020 Course Catalog, University Of Montana--Missoula. Office Of The Registrar

University of Montana Course Catalogs, 1895-2024

An annual catalog of courses and course descriptions offered at the University of Montana.

Influence Of Large Wood On Sediment Routing In A Mixed Bedrock-Alluvial Stream, Robin Welling

Graduate Student Theses, Dissertations, & Professional Papers

Sediment storage by instream wood in forested mountain streams mediates sediment movement from hillslopes through the channel network and can alter channel morphology at multiple spatial scales. Mixed bedrock-alluvial channels are prevalent in mountain stream networks, yet the distribution and geomorphic impact of large wood within these streams are poorly understood. To estimate how the distribution of large wood in a mixed bedrock-alluvial stream relates to sediment storage, we measured and characterized large wood, and surveyed the volume of associated sediment within a stream in the Bitterroot Mountains, Montana. The upstream portion of the study reach is predominantly alluvial and …

Vitellogenin Receptor As A Target For Tick Control: A Mini-Review, Robert D. Mitchell Iii, Daniel E. Sonenshine, Adalberto A. Pérez De León

Biological Sciences Faculty Publications

While much effort has been put into understanding vitellogenesis in insects and other organisms, much less is known of this process in ticks. There are several steps that facilitate yolk formation in developing oocytes of which the vitellogenin receptor (VgR) is a key component. The tick VgR binds vitellogenin (Vg) circulating in the hemolymph to initiate receptor-mediated endocytosis and its transformation into vitellin (Vn). The conversion of Vg into Vn, the final form of the yolk protein, occurs inside oocytes of the female tick ovary. Vn is critical to tick embryos since it serves as the nutritional source for their …

Mapping Status And Conservation Of Global At-Risk Marine Biodiversity, Casey C. O'Hara, Juan Carlos Villaseñor-Derbez, Gina M. Ralph, Benjamin S. Halpern

Biological Sciences Faculty Publications

To conserve marine biodiversity, we must first understand the spatial distribution and status of at‐risk biodiversity. We combined range maps and conservation status for 5,291 marine species to map the global distribution of extinction risk of marine biodiversity. We find that for 83% of the ocean, >25% of assessed species are considered threatened, and 15% of the ocean shows >50% of assessed species threatened when weighting for range‐limited species. By comparing mean extinction risk of marine biodiversity to no‐take marine reserve placement, we identify regions where reserves preferentially afford proactive protection (i.e., preserving low‐risk areas) or reactive protection (i.e., mitigating …

The Current Volume 30 : Issue 11 Homecoming, Nova Southeastern University

Student Newspapers

No abstract provided.

A Comprehensive Review Of Anaerobic Digestion Of Organic Solid Wastes In Relation To Microbial Community And Enhancement Process, Chi Wing, Alex Tsang, Xiaoying Lu

Department of Construction, Environment and Engineering

Organic solid wastes (OSWs) should be regarded as valuable resources rather than dead-end landfill waste that causes public health and odor concerns. Anaerobic digestion (AD) is an ideal approach for managing organic solid waste issues and involves using a group of anaerobic microorganisms to transformOSWs into useful products. In this review, over 100 publications related toADofOSWs have been compiled, discussed, and analyzed.Acomprehensive analysis of the environmental and safety impacts of AD, its key environmental factors, co-digestion, and pretreatment, as well as the AD of OSWs by various anaerobic microbes uncovered by high throughput sequencing-based approaches, is presented. The purpose of …

An Introduction To Logic: From Everyday Life To Formal Systems, Albert Mosley, Eulalio Baltazar

Open Educational Resources: Textbooks

An introduction to the discipline of logic covering subjects from the structures of arguments, classical and modern logic, categorical and inductive inferences, to informal fallacies.

• Over 30 years of development provides a sound empirical based pedagogy throughout the text.

• Examples in ordinary language using familiar examples avoids the suggestion of an alien cultural imposition.

• A focus on the basic representational techniques of classical and modern logic.

• Students introduced to basic concepts of set theory, using Venn diagrams to represent statements and evaluate arguments.

• Students introduced to basic concepts of propositional logic and the use of truth-tables.

• Students introduced to basic …