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Articles 151 - 180 of 253
Full-Text Articles in Pharmacology, Toxicology and Environmental Health
Development Of Culturing Methods For Native Mayfly Taxa For Use In Laboratory Toxicity Testing, Kevin Nicholas Rowsey
Development Of Culturing Methods For Native Mayfly Taxa For Use In Laboratory Toxicity Testing, Kevin Nicholas Rowsey
Theses, Dissertations and Capstones
Salinity is increasing in freshwaters throughout the world due to anthropogenic impacts with the implication of the increases to biological communities only now being realized. Declining mayfly populations in Appalachian streams have generated increased interest in elevated dissolved solids in that region and their effect on benthic macroinvertebrates, particularly the sensitive Ephemeroptera taxa. Field and laboratory evaluations have indicated high sensitivity of mayflies to elevated dissolved solids. The research described herein is part of an ongoing effort to provide opportunity for toxicity testing with native mayflies in the laboratory. A successful endeavor would establish mayfly sensitivity to total dissolved solids …
The Effect Of Silver Nanoparticles On Synaptic Responses In The Lateral Giant Escape Circuit Of The Crayfish, Samantha N. Adkins
The Effect Of Silver Nanoparticles On Synaptic Responses In The Lateral Giant Escape Circuit Of The Crayfish, Samantha N. Adkins
Theses, Dissertations and Capstones
The lateral giant neuron in the crayfish is a neuron that controls the reflexive escape response; the context and experience-dependent tuning of this response is critical for survival. Serotonin modulates synaptic responses in this neuron, and social experiences (stress) changes the modulatory role of serotonin. I investigated the mechanisms of induced synaptic response changes and serotonergic modulatory changes after silver nanoparticle exposure to ask if 1) contaminant induced stress changes serotonergic modulation in a manner consistent with social stress and 2) shed light on potential neurotoxic effects of widely used, but poorly understood nanomaterials. Our data show that stress induced …
Assessing Chemical Control Of Earthworms At Airports, Thomas W. Seamans, Bradley F. Blackwell, Glen E. Bernhardt, Daniel A. Potter
Assessing Chemical Control Of Earthworms At Airports, Thomas W. Seamans, Bradley F. Blackwell, Glen E. Bernhardt, Daniel A. Potter
United States Department of Agriculture Wildlife Services: Staff Publications
Earthworms originating from Europe (e.g., Lumbricus spp., Aporrectodea spp.), which are common in the United States and southern Canada can create hazardous conditions at airports by attracting birds that pose a threat to aircraft. These nonnative earthworms are also considered pests on golf courses and sports fields, as well as having detrimental effects on temperate boreal forests. No toxicants or repellents are currently registered for earthworm control in the United States. Our purpose was to identify products that could be used to repel or suppress nonnative earthworms on airports or other managed sites where they pose a hazard or nuisance. …
Ramapough/Ford The Impact And Survival Of An Indigenous Community In The Shadow Of Ford Motor Company’S Toxic Legacy, Chuck Stead
Ramapough/Ford The Impact And Survival Of An Indigenous Community In The Shadow Of Ford Motor Company’S Toxic Legacy, Chuck Stead
Antioch University Dissertations & Theses
The purpose of this study was to examine the history of the Ford Motor Company’s impact upon the Ramapo Watershed of New York and New Jersey, as well as upon the Ramapough Munsi Nation, an indigenous population living there. In a 25 year span the automaker produced a record number of vehicles and dumped a massive amount of lead paint, leaving behind a toxic legacy that continues to plaque the area and its residents. The Ramapough people are not unlike many native nations living in the United States who have experienced industrial excess. This study examines the mindset that allows …
Biological And Physiological Condition Of Juvenile California Halibut (Paralichthys Californicus) Exposed To A Contamination Gradient In Mission Bay, Ca, Kevin Stolzenbach
Biological And Physiological Condition Of Juvenile California Halibut (Paralichthys Californicus) Exposed To A Contamination Gradient In Mission Bay, Ca, Kevin Stolzenbach
Theses
Contaminated sediments in marine environments have been shown to be good indicators of ecological risk and a means to assess anthropogenic impacts on marine habitats and the animals that inhabit them (Long et al. 1995, Rattner 2009). Estuarine sediments are especially complex media with regard to physical, chemical, and biological characteristics that trap, store, modify and sometimes release contaminants to the biota (Long et al. 1995). Especially vulnerable are animals that are in constant contact with the sediments, such as flatfishes that partially bury themselves for camouflage (Costa et al. 2011). Impacts can be assessed in a number of ways, …
Application Of A Bioenergetics Framework For Assessing Sub-Lethal Effects Of Pollutants In The Freshwater Mussel Elliptio Complanata, Christopher G. Goodchild
Application Of A Bioenergetics Framework For Assessing Sub-Lethal Effects Of Pollutants In The Freshwater Mussel Elliptio Complanata, Christopher G. Goodchild
All Theses And Dissertations
Although biomarkers are frequently used to assess sublethal effects of contaminants, a lack of mechanistic linkages to higher-level effects limits the predictive power of biomarkers. Bioenergetics has been proposed as a framework for linking cellular effects to whole-animal effects. We investigated sublethal effects of exposure to wastewater treatment facility effluent in freshwater mussels in situ, thereby capturing ecologically relevant exposure conditions. Our study focused on the energetic biomarker AMP-activated protein kinase (AMPK), while also considering more traditional biomarkers like heat shock proteins (HSP70), and antioxidant enzymes (i.e., superoxide dismutase (SOD), glutathione-S-transferase (GST)). We examined biomarkers at mRNA and protein levels. …
Detection Of Pahs In Commercial And Wild Caught Fish Oil Using Scanning Fluorescence Spectroscopy, Edwin Antonio Pena
Detection Of Pahs In Commercial And Wild Caught Fish Oil Using Scanning Fluorescence Spectroscopy, Edwin Antonio Pena
Seton Hall University Dissertations and Theses (ETDs)
The DeepWater Horizon (DWH) oil spill contaminated a large area in the Gulf of Mexico in summer 2010. It is likely that many aquatic species in the Gulf were affected by the spill. Crude oil contains polycyclic aromatic hydrocarbon (PAHs). Some PAHs are carcinogenic to fish and humans. The purpose of this project was to develop menhaden fish oil as a biomonitoring tool for crude oil contaminants such as PAHs using scanning fluorescence spectroscopy (SFS). Menhaden (Genus Brevoortia) is one of the most ecologically and economically important marine fish species along the Atlantic and Gulf coast; however, it is …
Subthreshold Toxic Effects Of Atrazine And Three Degradates On Behavior In Procambarus Clarkii, Carol B. Starkey
Subthreshold Toxic Effects Of Atrazine And Three Degradates On Behavior In Procambarus Clarkii, Carol B. Starkey
Theses, Dissertations and Capstones
Atrazine is among the most heavily applied pesticides worldwide, and recent evidence suggests that it may be unsafe at environmental levels. It is a known endocrine disruptor and a suggested neurotoxin. The US EPA Maximum Contaminant Level (MCL) is 3 μg/L for human ingestion and 200 μg/L for limited human exposure. Several environmentally persistent degradates have been identified, including deethylatrazine (DEA), deisopropylatrazine (DIA) and hydroxyatrazine (HA). No MCLs have been established for these degradates, although some are suggested toxins. Thus, there remains concern for the risk associated with the presence of atrazine and its degradates in the environment. Currently little …
The Effects That Liquid And Solid Cattle Manure Have On The Water Quality Of Drainage Ditches In Putnam County, Ohio, Janelle Horstman
The Effects That Liquid And Solid Cattle Manure Have On The Water Quality Of Drainage Ditches In Putnam County, Ohio, Janelle Horstman
Honors Projects
Lake Erie has experienced harmful algal blooms with increased frequency since the mid-1990s due to excess nutrients from Rivers, such as the Maumee River, and largely agricultural watersheds. Nonpoint source pollution from agriculture contributes to eutrophication, algal blooms, and the degradation of water quality. This creates stress on aquatic fauna, reduced aesthetic quality, odor, and limits of the water for usage of drinking, recreation, and industry. This research paper asks what the contributions of having access to manure application records, soil records, and information about antibiotics have on what is known about manure management and antibiotic resistance, which has been …
Parent-Metabolite Pharmacokinetic Models For Tramadol – Tests Of Assumptions And Predictions, Sam Holford, Karel Allegaert, Brian J. Anderson, Butch Kukanich, Altamir B. Sousa, Amir Steinman, Bruno Pypendop, Reza Mehvar, Mario Giorgi, Nick Holford
Parent-Metabolite Pharmacokinetic Models For Tramadol – Tests Of Assumptions And Predictions, Sam Holford, Karel Allegaert, Brian J. Anderson, Butch Kukanich, Altamir B. Sousa, Amir Steinman, Bruno Pypendop, Reza Mehvar, Mario Giorgi, Nick Holford
Pharmacy Faculty Articles and Research
Allometric principles were used to discern cross-species differences in (±)-tramadol disposition and formation of its primary analgesic metabolite, (±)-O-desmethyl-tramadol (M1). Species differences in formation of M1 may help predict the analgesic effectiveness of tramadol. Tramadol was administered intravenously by a zero-order (constant infusion) process or rapid bolus dose and racemic concentrations of tramadol and M1 measured. Data were pooled to define differences between species (human, rat, cat, dog, goat, donkey and horse). A two-compartment linear disposition model with first-order elimination was used to describe tramadol and M1 disposition. Slow metabolizers were detected in 6% of the population and tramadol clearance …
Distribution And Elimination Of 3-Trifluoromethyl-4-Nitrophenol (Tfm) By Sea Lamprey (Petromyzon Marinus) And Non-Target, Rainbow Trout (Oncorhynchus Mykiss) And Lake Sturgeon (Acipenser Fulvescens), Michael W. Le Clair
Theses and Dissertations (Comprehensive)
The pesticide, 3-trifluoromethyl-4-nitrophenol (TFM), has been highly successful in the control of sea lamprey (Petromyzon marinus) populations in the Great Lakes. Treatments with TFM involve applying it to streams, where it targets larval sea lamprey which live burrowed in the stream substrate. While the toxic mechanism of TFM has been elucidated, and its effects on sea lamprey described, its effects on non-target fish species such as rainbow trout (Oncorhynchus mykiss) and lake sturgeon (Acipenser fulvescens) are not as well understood. The present work demonstrated that rainbow trout show a great capacity to detoxify the lampricide using glucuronidation, when exposed to …
West Coast Rock Lobster Fishery Ecological Risk Assessment 20 February 2013, Department Of Fisheries
West Coast Rock Lobster Fishery Ecological Risk Assessment 20 February 2013, Department Of Fisheries
Fisheries Occasional Publications
No abstract provided.
Food, Parasites, And Epidemiological Transitions: A Broad Perspective, Karl Reinhard, Luis Fernando Ferreira, Françoise Bouchet, L. Sianto, J. M.F. Dutra, A. Iniguez, Daniela Leles, M. Le Bailley, Martín Horacio Fugassa, Elisa Pucu, Adauto Araújo
Food, Parasites, And Epidemiological Transitions: A Broad Perspective, Karl Reinhard, Luis Fernando Ferreira, Françoise Bouchet, L. Sianto, J. M.F. Dutra, A. Iniguez, Daniela Leles, M. Le Bailley, Martín Horacio Fugassa, Elisa Pucu, Adauto Araújo
Karl Reinhard Publications
Pathoecology provides unique frameworks for understanding disease transmission in ancient populations. Analyses of Old and New World archaeological samples contribute empirically to our understanding of parasite infections. Combining archaeological and anthropological data, we gain insights about health, disease, and the way ancient people lived and interacted with each other and with their environments. Here we present Old and New World parasite evidence, emphasizing how such information reflects the different ways ancient populations exploited diverse environments and became infected with zoonotic parasites. It is clear that the most common intestinal helminthes (worm endoparasites) were already infecting ancient inhabitants of the New …
Neurotensin And Cholecystokinin Contract Gallbladder Circular Muscle In Chickens, Teresa F. Degolier, D. R. Brown, Gary E. Duke, M. M. Palmer, J. R. Swenson, Robert E. Carraway
Neurotensin And Cholecystokinin Contract Gallbladder Circular Muscle In Chickens, Teresa F. Degolier, D. R. Brown, Gary E. Duke, M. M. Palmer, J. R. Swenson, Robert E. Carraway
Biological Sciences Faculty Publications
The contractile effects of neurotensin (NT) and cholecystokinin octapeptide (CCK-8) on isolated circular smooth muscle strips of chicken gallbladder were investigated. The NT (0.25-300 nM) produced concentration-dependent contractions on smooth muscle with an EC50 of 8.5 nM (95% confidence limits = 5.3-13.6 nM). In comparison, CCK-8 produced concentration-dependent contractions with an EC50 of 13 nM (95% confidence limits of 9-20 nM). There were no statistical differences in contractile responses when comparing NT and CCK-8 at equimolar concentrations. The NT appears to act directly on smooth muscle tissue in the chicken; the contractile responses were not blocked by 10 μM atropine …
In-Water Hull Cleaning And Filtration System: In-Water Cleaning Trials, Department Of Fisheries
In-Water Hull Cleaning And Filtration System: In-Water Cleaning Trials, Department Of Fisheries
Fisheries Occasional Publications
No abstract provided.
In-Water Hull Cleaning System Cost & Cost Benefit Analysis, Department Of Fisheries
In-Water Hull Cleaning System Cost & Cost Benefit Analysis, Department Of Fisheries
Fisheries Occasional Publications
No abstract provided.
Guidance Statement For Oil And Gas Industry Consultation With The Department Of Fisheries, Department Of Fisheries
Guidance Statement For Oil And Gas Industry Consultation With The Department Of Fisheries, Department Of Fisheries
Fisheries Occasional Publications
No abstract provided.
Release Of Avian Neurotensin In Response To Intraluminal Contents In The Duodenum Of Chickens, Teresa F. Degolier, Robert E. Carraway
Release Of Avian Neurotensin In Response To Intraluminal Contents In The Duodenum Of Chickens, Teresa F. Degolier, Robert E. Carraway
Biological Sciences Faculty Publications
Peripheral and hepatic-portal plasma levels of neurotensin (NT) in fed and fasted chickens were determined using RIA. Portal levels of NT1-13 (fed = 61.3 ± 3.9 fmol/mL; fasted = 44.5 ± 3.9 fmol/mL) were significantly higher than peripheral levels (fed = 8.2 ± 3.3 fmol/mL; fasted = 7.8 ± 3.0 fmol/mL) collected from the wing vein, indicating that some NT is metabolized in the liver. Portal plasma levels of NT collected from fed birds were also significantly higher than portal plasma levels of NT collected from fasted birds. Neurotensin, as identified by HPLC, exhibited a 2-fold increase in plasma extracts …
Determinación Del Efecto Teratogénico En El Desarrollo Del Tejido Óseo En Rattus Norvegicus Cepa Wistar, Inducido Por La Presencia De Arsénico A Concentraciones Encontradas En Aguas De Zimapán, Hidalgo, México, Mireya Quiterio-Pérez, Juan Carlos Gaytán-Oyarzún, Scott Monks, Alberto José Gordillo-Martínez, Francisco Prieto-García
Determinación Del Efecto Teratogénico En El Desarrollo Del Tejido Óseo En Rattus Norvegicus Cepa Wistar, Inducido Por La Presencia De Arsénico A Concentraciones Encontradas En Aguas De Zimapán, Hidalgo, México, Mireya Quiterio-Pérez, Juan Carlos Gaytán-Oyarzún, Scott Monks, Alberto José Gordillo-Martínez, Francisco Prieto-García
Estudios científicos en el estado de Hidalgo y zonas aledañas
En el presente trabajo se evaluaron los posibles efectos teratogénicos del Arsénico (As) de las mismas concentraciones registradas en aguas de Zimapán, Hidalgo, empleando ejemplares de Rattus norvegicus de la cepa Wistar, preñadas. Las cuales se sometieron a diferentes concentraciones de Arsenato de Sodio (1887.91 mg/l, 943.95 mg/l y 0.5 mg/l), la concentración 0.5 mg/l corresponde a la registrada en agua de Zimapán, Hidalgo, así como Trióxido de Cromo (166.0 mg/l) utilizado como control positivo y Sacarosa al 5% como un control negativo. Los ejemplares se expusieron del día 7º al 15º de gestación, y se sacrificaron el día 19º …
El Uso De Helmintos Parásitos Como Bioindicadores En La Evaluación De La Calidad Del Agua: Lago De Tecocomulco Vs. Laguna De Metztitlán, Hidalgo, México, Scott Monks, Griselda Pulido-Flores, Christian E. Bautista-Hernández, Berenice Alemán-García, Jorge Falcón-Ordaz, Juan Carlos Gaytán-Oyarzún
El Uso De Helmintos Parásitos Como Bioindicadores En La Evaluación De La Calidad Del Agua: Lago De Tecocomulco Vs. Laguna De Metztitlán, Hidalgo, México, Scott Monks, Griselda Pulido-Flores, Christian E. Bautista-Hernández, Berenice Alemán-García, Jorge Falcón-Ordaz, Juan Carlos Gaytán-Oyarzún
Estudios científicos en el estado de Hidalgo y zonas aledañas
Como parte integral de la evaluación de la calidad ambiental del estado de Hidalgo, este estudio tiene énfasis en los helmintos parásitos de los peces y su uso como bioindicadores de la calidad de agua en Lago de Tecocomulco y Laguna de Metztitlán. Como parte del estudio, se obtuvieron los parámetros ecológicos de la infección para cada especie. En Lago Tecocomulco se registraron dos especies de digéneos (larvas), Posthodiplostomum sp. y Diplostomum sp. en el cerebro, los ojos y el mesenterio de dos especies de peces nativos de la zona (Chirostoma jordani y Girardinicthys viviparus); un céstodo (larva), …
Exploring The Sulfide Tolerance Of Ectosymbiotic Niphargus Amphipods From The Frasassi Caves, Central Italy, Jan Bauermeister, Karoline Assig, Sharmishtha Dattagupta
Exploring The Sulfide Tolerance Of Ectosymbiotic Niphargus Amphipods From The Frasassi Caves, Central Italy, Jan Bauermeister, Karoline Assig, Sharmishtha Dattagupta
International Journal of Speleology
Two species of the crustacean amphipod genus Niphargus inhabit the sulfidic groundwaters of the Frasassi caves in central Italy, and both harbor filamentous, sulfide-oxidizing Thiothrix ectosymbionts. As sulfide is toxic to most aerobic organisms, it appeared possible that the ectosymbionts could help their Niphargus hosts with detoxification processes. In this study, mortality due to sulfide was compared between Niphargus individuals with ectosymbionts and individuals whose ectosymbionts had been killed by antibiotic treatment. Both Frasassi-dwelling Niphargus species revealed exceptionally high tolerances to sulfide compared to other amphipod species studied so far. Niphargus individuals without viable ectosymbionts tolerated sulfide levels exceeding those …
Research, Monitoring, Assessment And Development Plan 2011 – 2012, Department Of Fisheries
Research, Monitoring, Assessment And Development Plan 2011 – 2012, Department Of Fisheries
Fisheries Occasional Publications
No abstract provided.
Role Of Dopamine In Impulse Control, Paul Rafael Sabandal ^, Young-Cho Kim, Kyung-An Han *
Role Of Dopamine In Impulse Control, Paul Rafael Sabandal ^, Young-Cho Kim, Kyung-An Han *
COURI Symposium Abstracts, Summer 2011
No abstract provided.
Assessing The Stability, Biological Transfer And Developmental Impact Of Environmentally Relevant Nitrosamines Using A Chicken Egg Model, Nikita Joshi
Environmental Health, Occupational Health, and Toxicology: Dissertations and Student Research
Nitrosamines comprise a large group of potentially toxic compounds occurring in the environment as by-products of various manufacturing, agricultural and natural processes. Nitrosamines are produced from reaction of nitrite with a suitable secondary amine in an acidic matrix; these acidic conditions can occur in environmental media and in the mammalian gastrointestinal (GI) tract. This research focused on the stability, transfer, and impacts of the environmentally relevant nitrosamines, N-nitrosodimethylamine (NDMA), N-nitrosmorpholine (NMOR), and N-nitrosoatrazine (NNAT) (formed from reaction of nitrite with dimethylamine, morpholine, and atrazine), using the chicken egg and embryo model systems. Chicken eggs were used to …
Causes, Extent, And Consequences Of Lead-Pellet Ingestion By Chukars (Alectoris Chukar) In Western Utah: Examining Habitat, Search Images, And Toxicology, R. Justin Bingham
Causes, Extent, And Consequences Of Lead-Pellet Ingestion By Chukars (Alectoris Chukar) In Western Utah: Examining Habitat, Search Images, And Toxicology, R. Justin Bingham
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Lead ingestion adversely affects humans and over 130 species of wildlife. Wild chukars (Alectoris chukar) are documented to ingest lead, but the causes and consequences of this ingestion are poorly understood. The objectives of this research were to 1) examine the influence of habitat use, the hunting season, and seasonal climate on the extent and severity of lead ingestion by chukars in western Utah, 2) assess the effects of habitat use, feeding behaviors, and lead density on the causes of lead-pellet ingestion in captive and wild chukars, and 3) investigate the consequences of lead-pellet ingestion in captive chukars as a …
The Effects Of Climate Change On Basic Animal Cell Functions, Michelle Fulbright, Andrew Andres
The Effects Of Climate Change On Basic Animal Cell Functions, Michelle Fulbright, Andrew Andres
Festival of Communities: UG Symposium (Posters)
Increasing global temperatures during the 21st century may have detrimental effects on basic cell functions within ectothermal animals. This project aims to systematically examine the effects of climate change on secretory cargo localization through the analysis of Rab Proteins found in the model organism Drosophila melanogaster. Rab Proteins play an essential role in vesicular transport within the cell and can be genetically manipulated to monitor the biological consequences of global warming.
High Resolution Hybrid Mass Spectrometry For The Determination Of Marine Biotoxins, Azaspiracids, And Their Biotransformation Products., Zuzana Skrabakova
High Resolution Hybrid Mass Spectrometry For The Determination Of Marine Biotoxins, Azaspiracids, And Their Biotransformation Products., Zuzana Skrabakova
Theses
Azaspiracids (AZAs), polyether marine toxins, are produced by marine microalgae and accumulate in filter-feeding bivalve molluscs, such as mussels, clams, oysters and scallops, while grazing on phytoplankton, from which they derive nutrition. Although being discovered quite recently, AZAs have caused several human intoxication events and thus became a problem for health authorities and shellfish industries. The rapid development of highly sensitive liquid chromatography multiple tandem mass spectrometry (LC-MS/MS, LC-MS") methods enabled the identification of numerous AZA analogues and added to the control of shellfish contamination. Tandem mass spectrometry techniques, while being highly selective and sensitive for determination of AZAs in …
Pharmacokinetic Evaluation Of The Blood: Tissue Relationship In Poultry: Screening For Antibiotic Residues In Chicken Muscle, Ixchel Reyes Herrera
Pharmacokinetic Evaluation Of The Blood: Tissue Relationship In Poultry: Screening For Antibiotic Residues In Chicken Muscle, Ixchel Reyes Herrera
Graduate Theses and Dissertations
During their life, humans are exposed to numerous substances that are naturally present in the environment or that are the result of man made processes, including heavy metals, persistent organic pollutants, pesticides and veterinary drugs. Some of these substances can leave residues in food products and possibly expose consumers to their potential toxic effects. To address these problems extensive regulatory efforts are devoted to prevent, detect and control these substances from reaching the food supply. However, given the vast diversity of food products that requires monitoring and the immense diversity of potential chemical contaminants, the need for an efficient and …
Tactical Research Fund – Asfb 2009 Workshop, Department Of Fisheries
Tactical Research Fund – Asfb 2009 Workshop, Department Of Fisheries
Fisheries Occasional Publications
Biodiversity of aquatic ecosystems – What to measure and monitor for fisheries and ecosystem management FRDC Project No. 2008/353.
Poisonous Rangeland Plants In San Luis Obispo County, Sara Litten, Amanda Ou
Poisonous Rangeland Plants In San Luis Obispo County, Sara Litten, Amanda Ou
Animal Science
Poisonous Rangeland Plants in San Luis Obispo County is a comprehensive educational guide to rangeland plants that are toxic to domestic livestock. This guide begins with an exploration of how the biological systems are affected by the poisonous plant toxins. The biochemistry behind these toxins is included in the discussion. Next, reference material for fourteen plants that inhabit San Luis Obispo County is provided. This information includes specific toxins found in poisonous plants, affected animals, symptoms of poisoning, stages of growth, lethal dose, and distribution of the plant in California. This section of the guide is filled with helpful photos …