Other Life Sciences Commons^™

Development Of The Core Lit Apparatus For Seaweed Hatcheries (Clash) Bioreactor Using A Germplasm Approach, Phillip O. Tahimic

Cal Poly Humboldt theses and projects

In comparison to the Asian aquaculture industry, the United States has minimal seaweed production. There are several drivers of the limited industry in the US, such as regulatory constraints and limited market demand, but the ability to scale is a considerable barrier to commercialization. One possible solution is the development of land-based systems that integrate bioreactors, which utilize fewer resources and do not wholly rely on an oceanic flow-through system. This study assessed the application of a modular bioreactor, known as Core Lit Apparatus for Seaweed Hatcheries (CLASH), as a nursery system and open-source project designed to expand land-based seaweed …

The Role Of Resistance Training In Managing Menopause-Related Changes, Alyson K. Strauss

Honors Undergraduate Theses

Resistance training serves as a critical non-pharmacological strategy for mitigating the physiological and psychological declines associated with the menopausal transition. This natural biological phase, marked by declining estrogen levels, typically leads to accelerated bone mineral density loss, sarcopenia, metabolic regulation disturbance, and heightened mood disturbances. To evaluate the efficacy of targeted exercise interventions, a systematic review was conducted following PRISMA guidelines. From an initial pool of 60 relevant articles, 13 studies met the specific inclusion criteria, focusing on structured resistance training protocols for perimenopausal, menopausal, and postmenopausal cohorts.

The synthesis of these studies indicates that resistance training is a highly …

Exploration Of The Use Of Radiocarbon Time-Series Records As Indicators Of Upwelling Areas, Rena Reshmi Mukherjee

CMC Senior Theses

The Earth’s oceans buffer climate change, regulate weather patterns, sustain global food security, and support biomedical research. Ocean currents redistribute heat and nutrients while promoting genetic diversity, which can serve as a source of novel compounds for biomedical research. Understanding ocean circulation is essential for maintaining these ecosystem services as the climate continues to change. Upwelling, a form of vertical water movement that transports nutrient-rich deep water to the surface, plays a key role in marine productivity and carbon cycling. However, global upwelling patterns remain incompletely mapped. Radiocarbon (14C), a radioactive isotope of carbon, provides a useful tracer of ocean …

Feasibility Of Corn Stover For Biogas Production In Northwestern Illinois: A Case Study Of Jo Daviess And Carroll Counties, Anthony Amotoe-Bondzie

Masters Theses

The growing demand for renewable energy and sustainable waste management has intensified interest in agricultural residues such as bioenergy feedstocks. This study evaluated the feasibility of converting corn stover into biogas through anaerobic digestion (AD) in Jo Daviess and Carroll Counties, Illinois, with consideration of the Savanna Industrial Park as a potential centralized processing hub. Although corn stover represents one of the largest biomass resources in the United States, this research identifies a critical gap between theoretical availability and practically recoverable feedstock. Using a mixed-methods framework, the study integrates biomass quantification, methane yield modeling, economic analysis, and policy assessment. Results …

Effects Of Volatile Organic Compounds Produced By Temperature-Adapted Microbes On Duckweed Growth, Phaedra Yael Stemp

Honors Theses and Capstones

As host-associated microbes adapt to their abiotic environment, these adaptations can affect their host species as well. Previous research showed that varying temperatures and volatile organic compound (VOC) production can affect microbial benefits to hosts. This experiment analyzed how 27 microbes pre-adapted to different temperature conditions affected growth of their host, common duckweed plants, comparing effects of direct contact with microbes, effects of microbe VOCs alone, or both. Each microbe was pre-adapted to one of three temperature regimes: “Northern” at 28 °C, “Southern” at 33 °C, and “Extreme” at 36 °C. We then grew duckweeds in I-plates with each microbe …

Electrochemical Sensors Based On Graphene Oxide/Pedot:Pss Composite Decorated With Bimetallic Gold–Silver Nanoparticles For H2o2 Detection, Rayyan Azzahra Hidayat, Budi Riza Putra, Munawar Khalil, Wulan Tri Wahyuni

Makara Journal of Science

Hydrogen peroxide (H₂O₂) is a biomarker that indicates oxidative stress levels in the human body; thus, rapid and accurate detection methods are necessary to diagnose various disorders. This study developed a nonenzymatic electrochemical sensor for detecting H₂O₂ using bimetallic gold–silver nanoparticles (Au–Ag NPs) combined with graphene oxide and poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate)-modified glassy carbon electrode. The surface properties of the modified electrodes were characterized using scanning electron microscopy–energy dispersive spectroscopy and atomic force microscopy. The electrochemical performance of the modified electrodes was evaluated using cyclic voltammetry, electrochemical impedance spectroscopy, and differential pulse voltammetry. The bimetallic Au-Ag …

Everyday Practices In Seed Sovereignty, Tapiwa Singini, Wu Xu

Journal of Nonprofit Innovation

Seed sovereignty is increasingly recognized as central to debates around food security, biodiversity, and rural livelihoods, particularly in the Global South. In Malawi, seed is not merely an agricultural input but a carrier of memory, resilience, and political agency. This paper explores how smallholder farmers in rural Malawi engage in everyday acts of resistance to maintain seed sovereignty amidst expanding corporate influence, restrictive state policies, and climate variability. Based on 12 months of ethnographic fieldwork in Mchinji District, I employ a political ecology framework and peasant resistance theory to analyze the lived strategies of farmers. These include seed saving, informal …

What’S That Smell? It’S Climate Change!, Perry Gregory

Capstones

Climate change is going to make New York City smell worse. Reporter Perry Gregory breaks down the process of olfaction and explains how heat affects what we smell. The piece features a collage of voices of New Yorkers describing the current smell profile of the city. The report features insight from several Atmospheric Scientists into why New York City is getting hotter and more humid, and how those climate changes will make the existing smells of the city stronger, and worse. The most economically vulnerable New Yorkers, who cannot afford air conditioning to buffer them from heat, will be the …

A Geological And Geochemical Study Of The Philipsburg Mining District, Granite County, Montana, Celine M. Beaucamp

Graduate Theses & Non-Theses

The Philipsburg district, renowned for its rich mining history, has contributed significantly to Montana's mineral production, ranking as the state's second-most productive district. Active from 1865 to the 1980s, it yielded an impressive array of Ag (50-60 million oz), with notable outputs of Au, Zn, Pb, Cu, and battery-grade MnO2. The district features Cordilleran polymetallic veins, some of which are along bedding in Mississippian and Devonian limestone, and others are steeply dipping quartz veins in silicate-rich sedimentary rocks and in the Philipsburg batholith. The veins exhibit a district-wide mineral zonation, marked by Cu- and Ag-rich ores near granite porphyries, with …

Aqueous Geochemistry Drives Microbial Cu, Fe, And Zn Uptake Rates In Yellowstone, A Continental Hydrothermal System, Eva Carolina Andrade-Barahona

Graduate Theses & Non-Theses

Microbial uptake of trace metal cofactors such as copper (Cu), iron (Fe), and zinc (Zn) is governed by biogeochemical processes in hydrothermal systems where metal bioavailability varies widely. In situ microbial metal uptake rates were quantified by applying metal stable isotope probing (MSIP) in the Yellowstone hydrothermal system across diverse geochemical conditions in hydrothermal springs. The findings in these studies revealed that pH exerts a dominant influence on microbial copper uptake rate, also enhanced by increased Cu²⁺ ion availability and dissolved oxygen. Microbial iron uptake, in contrast, displayed a broad tolerance to environmental variability, occurring across a pH range of …

Development Of Microcrystalline Tests For Fentanyl, Clonazepam, And Diazepam Identification, Karis French

Honors Projects

Microcrystalline tests are chemical tests that involve the mixing of a substance with a specific reagent resulting in the formation of a crystal structure. Currently, microcrystalline tests are used as presumptive tests in forensic drug chemistry laboratories to provide the suspected identity of unknown substances. There is, however, a limited amount of research on this use of microcrystalline structures. Additionally, this existing research is outdated and does not include some of the newer commonly encountered controlled substances including fentanyl, clonazepam, and diazepam. This literature-based review attempts to identify reagents that could be used in microcrystalline tests for the identification of …

Effect Of Polymer Contaminants Sourced From Coated Paper On The Performance Of The Resulting Recycled Paper, Ezekiel J. Guevarra

All Theses

The growing demand for sustainable packaging has accelerated the use of paper-based materials as alternatives to plastics. To provide barrier and functional properties, these materials are often modified with polymer coatings. While beneficial during use, such coatings can persist as contaminants during recycling, potentially disrupting fiber bonding and reducing the quality of recycled paper. This study examined the impact of extrusion-coated low-density polyethylene (LDPE) films and two aqueous dispersions (Vapor/Water-Barrier, Acrylic Film (VWAF) and Oil & Grease Barrier (OGBF)) on contaminant distribution and mechanical performance of recycled handsheets. Kraft paper coated at varying levels was repulped and formed into handsheets, …

Impacts Of Nutrient Addition And Disturbance On Coastal Dune Arthropod Communities And Trophic Interactions, Kayla Beitzel

Graduate Theses and Dissertations (2019 - present)

Coastal dune ecosystems face ongoing threats from human-mediated disturbance and altered resource availability. Because these dunes provide critical habitat for many organisms, including shorebirds, beach mice, and arthropods, changes in disturbance regimes or resource availability can impact plant communities and higher trophic levels by altering plant richness and productivity, which in turn influence arthropod abundance and diversity. To examine how disturbance and nutrient addition affect arthropod communities, we established twenty 5×5 m plots on Dauphin Island, crossing mechanical disturbance with a 10 g m⁻² addition of nitrogen, phosphorus, and potassium, replicated across five experimental blocks. Arthropods were sampled using three …

The Ecology Of Arthropod Rain In A Tropical Forest., Andrew Robert Seiler

Electronic Theses and Dissertations

Tropical forests are structured by complex vertical linkages and nutrient exchanges between canopy and understory habitats. These linkages include the downward flux of organisms, the movement of canopy fauna, and the recycling of nutrients through litter and organic matter deposition. This dissertation investigates arthropod rain and its role in connecting the canopy and forest floor processes in a lowland tropical forest in Panama. Chapter 2 quantifies “arthropod rain”, the fall of canopy arthropods into the understory. Using pan and pole traps, I measured the composition, abundance, and biomass of arthropods falling from the canopy and assessed environmental drivers of the …

A Guided Ungrading Example For Independent Research Projects In An Upper-Division Ecosystem Ecology Stem Course, Christine S. O'Connell

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Ungrading is a pedagogical approach that, in some iterations, emphasizes formative feedback and student self-assessment over traditional point-based grading. While increasingly popular in the humanities and social sciences, ungrading remains uncommon in STEM courses, particularly those that are content-intensive. This article presents a structured example of ungrading implemented in an upper-division ecosystem ecology course through a 7-week independent research project. Students used public or previously collected ecological data to investigate a scientific question, culminating in a short-format, manuscript-style research paper and a 10 min oral presentation. The project was scaffolded with multiple checkpoints, including structured reflections, peer review, and instructor …

Multiscale Modelling Of Eg5: Structural Insights Into Microtubule Interactions, Atp Hydrolysis, And Allosteric Inhibition Mechanisms, Soundarya Priya Alexandar Ms

Theses and Dissertations

The mitotic kinesin EG5 is essential for spindle bipolarity and accurate chromosome segregation during cell division, making it a validated anti-cancer target. Unlike conventional microtubule-targeting agents, EG5 inhibitors offer mitosis-specific action, reducing neurotoxicity. Although inhibitors targeting EG5’s allosteric site-I have been extensively studied, mechanistic insights into inhibition at site-II, and their combined effects, remain underexplored. This thesis systematically investigates the structural and dynamic mechanisms underlying EG5 function and its inhibition using an integrative computational approach.

Conformational analysis, coarse-grained dynamics, all-atom molecular dynamics simulations, and protein network analysis were performed on EG5 motor domain structures and EG5-microtubule complexes. Results show that …

Enhancing Cataract Surgery Outcomes: Optimal Use Of Pre- And Post-Operative Eye Drops, Keith Skolnick M.D., Anu Valiaveedu

Mako: NSU Undergraduate Student Journal

Many preoperative and postoperative cataract patients struggle with comprehending the use of prescription medication as directed. Language barriers and low health literacy levels are major factors contributing to improper use of prescriptions. To increase patients comprehension, the Fort Lauderdale Eye Institute employed an educational intervention consisting of a live presentation and an instructional video. Results found that 44% of patients were hesitant to ask questions to clinical staff, 32% felt overwhelmed, and nearly 70% lacked confidence in using their prescribed eye drops. Following the intervention, 91% of patients reported increased confidence in their medications, and most indicated that the video …

Dosimetric Comparison Of Dynamic Conformal Arc Using Ezfluence Versus Dynamic Conformal Arc With A Posterior Static Field, A Retrospective Thoracic Spine Study, Michelle Klemm

Masters Projects

Purpose

Spinal metastases are a common complication of advanced cancer, often requiring palliative radiation therapy. This study compares two dynamic conformal arc (DCA) based techniques for thoracic spine metastases: a single arc plan generated using EZFluence and a hybrid technique combining DCA with a posterior-anterior (PA) static field. The goal was to evaluate dosimetric differences in target coverage and organ-at-risk (OAR) sparing.

Methods

Ten thoracic spine computed tomography (CT) datasets from The Cancer Imaging Archive were retrospectively planned with both techniques using Eclipse v16.0. Each plan prescribed 3000 cGy in 10 fractions to a planning target volume (PTV) encompassing T5–T9 …

“Asking For Help Feels Like A Weakness”: Factors Shaping First-Year Students’ Expectations Of Stem Course Office Hours, Jeremy L. Hsu, Grace Holick, Rebecca M. Green, Elaine Benaksas Schwartz, Melissa Rowland-Goldsmith

Biology, Chemistry, and Environmental Sciences Faculty Articles and Research

Background

Office hours are one of the most ubiquitous resources for students in STEM courses. However, there has been only limited work examining what students think of STEM course office hours, and we are not aware of any past work that has examined (1) how students perceive STEM course office hours upon entering college, and (2) how these perceptions change over time and the factors that shape these perceptions and expectations of what will occur in office hours. Here, we utilize a longitudinal series of surveys to capture first-year students’ perceptions and expectancies for office hours at the beginning of …

Pediatric Occupational Therapists’ Perception On How Nature-Based Play Affects Fine Motor Development, Abbi M. Rosenow

Human Development and Family Sciences Undergraduate Honors Theses

This study aimed to explore the benefits of nature-based pediatric occupational therapy and the influence of nature and nature-based play on fine motor development. It was hypothesized that nature and nature-based play would positively impact a child’s fine motor skills, and that nature-based occupational therapy would offer unique benefits to a child’s therapeutic experience. To examine these relationships, a survey was distributed to pediatric occupational therapists across the United States. The survey was designed to gather insights into how occupational therapy supports fine motor development, how nature-based play/therapy enhances these skills, and the perceived benefits of incorporating nature into therapeutic …