A5074795796- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal ecosystems
- Toxic Organic Pollutants Impact
- Per- and polyfluoroalkyl substances research
- Effects and risks of endocrine disrupting chemicals
- Marine Toxins and Detection Methods
- Pharmaceutical and Antibiotic Environmental Impacts
- Pesticide Residue Analysis and Safety
- Analytical chemistry methods development
- Environmental Toxicology and Ecotoxicology
- Soil and Water Nutrient Dynamics
- Microbial Community Ecology and Physiology
- Air Quality and Health Impacts
- Atmospheric chemistry and aerosols
- Antimicrobial agents and applications
- Microplastics and Plastic Pollution
- Material Properties and Processing
- Physiological and biochemical adaptations
- Geochemistry and Elemental Analysis
- Photoreceptor and optogenetics research
- Marine and environmental studies
- Biosensors and Analytical Detection
- Metabolomics and Mass Spectrometry Studies
- Aquatic Ecosystems and Biodiversity
- Consumer Packaging Perceptions and Trends
Baylor University
2018-2024
Eastern Regional Research Center
2022-2024
Agricultural Research Service
2022-2024
Aquatic Systems (United States)
2020-2024
United States Department of Agriculture
2022
Cyanobacteria can form dense blooms under specific environmental conditions, and some species produce secondary metabolites known as cyanotoxins, which present significant risks to public health the environment. Identifying toxins produced by cyanobacteria in surface water fish is critical ensuring high quality food for consumption, protectionn of recreational uses. Current analytical screening methods typically focus on one class cyanotoxins a single matrix rarely include saxitoxin. Thus,...
Harmful algal blooms (HABs) are increasing in magnitude, frequency, and duration globally. Even though a limited number of phytoplankton species can be toxic, they becoming one the greatest water quality threats to public health ecosystems due their intrinsic toxicity humans numerous interacting factors that undermine HAB forecasting. Here, we show carbon:nitrogen:phosphorus (C:N:P) stoichiometry common toxic species, Microcystis, regulates toxin quotas during through tradeoff between...
Some components of plastic food packaging can migrate into food, and whereas migration studies known are required relatively straightforward, identification nonintentionally added substances (NIAS; unknowns) is challenging yet imperative to better characterizing safety. To this aim, was investigated across 24 unique products including wrap, storage bags, vacuum meat trays. Gas liquid chromatography separation systems coupled with Orbitrap mass analyzers were used for comprehensive...
Abstract The effects of changing hydrodynamic conditions and temperatures on polar organic chemical integrative sampler (POCIS) sampling rates ( R s ) were investigated for 12 crop protection chemicals. Exposure concentration was held constant in each laboratory experiment, flow velocities calculated from measured mass transfer coefficients the water boundary layer near surface POCIS devices. At a given temperature generally increased by factor 2 to 5 between stagnant condition higher (6–21...
Abstract Freshwater ecosystems are experiencing increased salinization. Adaptive management of harmful algal blooms (HABs) contributes to eutrophication/salinization interactions through the hydrologic transport coastal environments. We examined how nutrients and salinity interact affect growth, elemental composition, cyanotoxin production/release in two common HAB genera. Microcystis aeruginosa (non‐nitrogen [N]‐fixer microcystin‐LR producer [MC‐LR]) Aphanizomenon flos‐aquae (N‐fixer...
Anatoxin-a and its analogues are potent neurotoxins produced by several genera of cyanobacteria. Due in part to high toxicity potential presence drinking water, these toxins pose threats public health, companion animals the environment. It primarily exerts as a cholinergic agonist, with affinity at neuromuscular junctions, but molecular mechanisms which it elicits toxicological responses not fully understood. To advance understanding this cyanobacteria, proteomic characterization (DIA...
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Anatoxin-a is a globally occurring, yet understudied, chiral cyanobacterial toxin that threatens public health and the environment. It has led to numerous dog. livestock bird poisonings although it been studied in rodent models, comparatively little research occurred aquatic species. To advance comparative toxicology understanding of this alternative vertebrate developing zebrafish fathead minnow were exposed environmentally relevant elevated levels (13-4400 μg/L) (+) anatoxin-a examine...
Polar organic chemical integrative sampler (POCIS) is a passive sampling device that offers many advantages over traditional discrete methods, but quantitative time-weighted average (TWA) concentrations rely heavily on the robustness of rates. The effects changing concentration exposures POCIS rates and its ability to operate in an regime were investigated for 12 pesticides across range environmentally relevant concentrations. In five independent 21-day experiments, devices exposed these...
Though anatoxin-a (antx-a) is a globally important cyanobacterial neurotoxin in inland waters, information on sublethal toxicological responses of aquatic organisms limited. We examined influences (±) antx-a (11-3490 μg/L) photolocomotor behavioral and gene transcription associated with neurotoxicity, oxidative stress hepatotoxicity, two the most common alternative vertebrate fish models, Danio rerio (zebrafish) Pimephales promelas (fathead minnow). selected environmentally relevant...
Abstract Harmful cyanobacterial blooms are an increasing threat to water quality. The interactions between two ecophysiological functional traits of cyanobacteria, diazotrophy (nitrogen [N]‐fixation) and N‐rich cyanotoxin synthesis, have never been examined in a stoichiometric explicit manner. We explored how gradient resource N : phosphorus (P) affects the biomass, N, P stoichiometry, light‐harvesting pigments, cylindrospermopsin production N‐fixing cyanobacterium, Aphanizomenon . Low...
Antimicrobial coatings are designed to inhibit the growth of pathogens and have been used reduce foodborne illness bacteria on food processing equipment. Novel N-halamine based antimicrobial highly advantageous due their unique properties low cost, being investigated for applications in safety, health care, water air disinfection, etc. In this study, we evaluated chemical safety a novel polymer coating (Halofilm) use Migration tests were performed stainless steel tiles prepared with four...
The purpose of this study was to investigate the presence and levels per- polyfluoroalkyl substances (PFAS) in food packaging originating from different geographic locations. Food samples were extracted analyzed by targeted analysis with liquid chromatography-mass spectrometry (LC-MS/MS) before after a total oxidizable precursor (TOP) assay. Additionally, full-scan high resolution MS (HRMS) used screen for PFAS not included list. Of 88 samples, 84% had detectable at least one PFAS, 6:2...