Pharmacology, Toxicology and Environmental Health Commons^™

Electrochemical Detection Of Fentanyl Using Screen-Printed Carbon Electrodes With Confirmatory Analysis Of Fentanyl And Its Analogs In Oral Fluid Using Liquid Chromatography-Tandem Mass Spectrometry, Colby E. Ott

Graduate Theses, Dissertations, and Problem Reports (ETD)

Utilizing screen-printed carbon electrodes (SPCEs), a fast, simple, and sensitive approach toward the detection, identification, and quasi-quantitation of fentanyl was achieved both in an electrochemical cell and as a drop on the electrode surface. Electro-oxidation of fentanyl at the electrode was demonstrated using adsorptive stripping square-wave voltammetry between -0.5 V and +1.6 V with 100 mM Tris-HCl buffer at pH 8.5 as supporting electrolyte. Parameter optimization was conducted during method development to include supporting electrolyte and pH, electrochemical technique, pre-treatment and equilibration time, and various surface modifications. The simplest method utilizing an unmodified SPCE was determined to be appropriate for …

Halogenated Flame Retardants And Organophosphate Esters In The Air Of Electronic Waste Recycling Facilities: Evidence Of High Concentrations And Multiple Exposures, Sabrina Gravel, Jérôme Lavoué, Bouchra Bakhiyi, Miriam L. Diamond, Liisa M. Jantunen, Jacques Lavoie, Brigitte Roberge, Marc-André Verner, Joseph Zayed, France Labrèche

Études primaires

Background

In response to a worldwide increase in production of electronic waste, the e-recycling industry is rapidly rowing. E-recycling workers are exposed to many potentially toxic contaminants, among which flame retardants (FRs), mainly suspected of being endocrine disruptors, are thought to be the most prevalent.

Objective

To conduct an exposure assessment of four chemical groups of FRs in Canadian e-recycling facilities, and to identify the main cofactors of exposure.

Methods

Personal air samples were collected over a workday for 85 workers in six e-recycling facilities, grouped into three facility sizes, and for 15 workers in control commercial waste facilities. Total …

Investigating The Prevalence Of An Insecticide Resistance Gene In Culex Mosquito Populations Of Central Illinois, Kylee R. Noel

Masters Theses

The globalization of society has led to the spread of the vectors, mosquitoes, and diseases. Each year millions of people are killed by diseases vectored by mosquitoes. For example, West Nile Virus alone killed over 2,000 people in North America in 2017; 8 of those deaths being in Illinois. Two prominent vectors of West Nile Virus are Culex pipiens and Culex restuans; which are difficult to differentiate based upon morphological features. In this study, mosquitoes collected from two Illinois counties, Coles County and Champaign County, were first identified based upon morphology and this identification was then compared to probe-based …

Suction Dredge Mining Impacts On Pacific Lamprey Populations And Habitat In Washington State: A Case Study Of The Entiat River, Jaime Liljegren

All Master's Theses

Suction dredge mining is a largely unregulated recreational activity in Washington State with potentially significant impacts to aquatic habitat. Although dredging has the potential to cause widespread ecological effects, only impacts to select species have been thoroughly assessed. Due to their reliance on freshwater habitat throughout multiple life stages, Pacific lamprey are significantly vulnerable to impacts from dredging practices. This thesis focuses on assessing the effects of dredging to lamprey habitat within state-owned aquatic lands of Washington. Pacific lamprey are anadromous, utilizing freshwater habitat throughout key life stages including spawning in substrate ranging from coarse gravel to fine sand, and …

Validation Of A Low-Cost Sensor For Development Of Wearable And Handheld Spectrometers, Justin Leslie Cathey

Graduate Research Theses & Dissertations

This study examined the possibility of creating a quantitative radiometric spectrometer from a low-cost relative radiometric spectrometer sensor through the use of statistical analysis and development of a correction factor (p > 0.05). Radiometric spectrometers are able to measure and fully characterize the radiometric and photometric characteristics of light, while relative spectrometers are not able to fully, quantitatively characterize the radiometric response from a light source, thus they are less expensive. The spectrometer created in this research is able to measure and produce comparative lighting parameters as well as an actual radiometer spectrometer.

The photoreceptors cells within the human eye allow …

Detection Of Beta-Lactamase Variants In Municipal Wastewater And Fresh Water, Sunil Pandey

Masters Theses

The occurrence and spread of antibiotic-resistant genes (ARGs) are pressing public health problems worldwide. A key factor contributing to the spread of ARGs is lateral gene transfer. Wastewater treatment plants (WWTPs) are measured hot spots of microbial diversity and resistance because they receive polluted wastewater from diverse sources and contain a variety of different environments with dense bacterial loads. Due to the overuse of antibiotics the genetic capacities of microbes have profited. This helps every source of resistance gene and every means of horizontal gene transmission to develop the multiple mechanism of resistance to each antibiotic used clinically, agriculturally, or …

Mitragynine Reduced Morphine-Induced Conditioned Place Preference And Withdrawal In Rodents, Rittinarong Meepong, Thongchai Sooksawate

The Thai Journal of Pharmaceutical Sciences

Introduction: Kratom (Mitragyna speciosa Korth) has been long used in folklore medicine in Southeast Asian countries for its analgesic effects and the treatment of opioid withdrawal. Mitragynine is a major alkaloid found in the leaves of kratom plant th.

A Review Of Human Factors And Food Safety In Ireland, Ciara Walsh, Maria Chiara Leva

Articles

Increased product shelf-life and globalisation have led to longer and vastly more complicated food chains; potentially presenting greater opportunity for contamination and microbial growth to occur. Modern food safety management systems risk assess hazards (based on current scientific data) and strive to control these, often extensive and convoluted, food production/supply chains through appropriate good hygiene practices (GHP) and HACCP. Contamination of food as a result of human error can undermine even the most carefully prepared and executed HACCP system – culminating in foodborne infection, outbreaks, reputable damage, and erosion of consumer trust. This paper provides a review on the effect …

Critical Physicochemical Properties For Nanoparticle Toxicity: Impact Of Surface Coating And Size On Particle-Induced Cell Transformation And Inflammatory Response, Tiffany Kornberg

Graduate Theses, Dissertations, and Problem Reports (ETD)

Nanoparticles, which measure 100 nm in at least one dimension, have surged in development, production, and use for a wide range of applications. However, the rapid pace of development for these emerging materials with unclear/unknown toxicity profiles makes it difficult to adequately assess health risk associated with exposure. One critical obstacle which limits scientific research to fill these critical knowledge gaps is the lack of accurate and predictive models for nanotoxicology studies, particularly those which involve occupationally relevant exposure scenarios (pulmonary exposure to low dose of particles in the circulating air). Typically, animal models are used to assess potential systemic …

Allium Cepa Extract Attenuates Ccl4-Induced Oxidative Stress In Rat Brain, Israel Oghenevwodokohwo Okoro, Helen Ejiro Kadiri, Augusta Inegbedion

The Thai Journal of Pharmaceutical Sciences

Introduction: Carbon tetrachloride (CCl4) has been used extensively to evaluate the probable mechanisms of toxicity in experimental animals. The CCl4 induced oxidative stress in rat brain has been established. This study aim to investigate the neuro-prot.

Potentiating Role Of Palm Oil And Its Extracts In Cadmium Induced Alteration Of Amino Transferase, Patrick Chukwuyenum Ichipi-Ifukor

The Thai Journal of Pharmaceutical Sciences

Aims: This study examined the effects of palm oil and palm oil extracts pre-treatment on the activities of serum and tissue amino transferases in acute cadmium induced toxicity. Methodology: Six experimental groups was used and group A served as the con..

Three Functional Foods From Garcinia Mangostana L. Using Low-Alpha-Mangostin Aqueous Extract Of The Pericarp: Product Development, Bioactive Compound Extractions And Analyses, And Sensory Evaluation, Pattamapan Lomarat, Primchanien Moongkarndi, Jutaphen Jaengprajak, Jutima Samer, Vimol Srisukh

The Thai Journal of Pharmaceutical Sciences

Background: As a result of the expansion of aging society worldwide, the trend in consuming healthy foods as well as functional foods for maintaining good health and preventing chronic diseases is increasing. Currently, functional foods are commercially .

The Activity Of Red Ginger Oil In Antioxidant Study In Vitro And Antihyperalgesia Effect In Alloxan-Induced Painful Diabetic Neuropathy In Mice, Fifteen Aprila Fajrin

The Thai Journal of Pharmaceutical Sciences

Background: Red ginger oil (RGO) was reported had the highest bio-constituent, especially its essensial oil which was important for antioxidant, than the other varieties. Chronic diabetic triggered the increasing of reactive oxygen species (ROS) which re.

Antiformation And Antimutagenic Activities Of Extracts From Pericarp And Seed Of Zanthoxylum Limonella (Dennst.) Alston, Patamawan Wipoosanapan, Keaw Kangsadalampai, Linna Tongyonk

The Thai Journal of Pharmaceutical Sciences

Zanthoxylum limonella aston (Z. limonella) is a popular spice in northern Thailand. It is used as a flavoring agent for certain foods. There have been studies about the biological activity of this spice including, antioxidant antimicrobial and anticancer.

Risk Assessment For Ingestion Of Off-Season Longan Stimulated By Potassium Chlorate, Theerayut Baubhom, Kannikar Chatsantiprapa

The Thai Journal of Pharmaceutical Sciences

Off-season longans in Thailand were stimulated by potassium chlorate (KClO3). KClO3 is hazardous chemical and prohibited in food since it might cause harm to human health. This research aimed to observe for chemical effects on longan trees, and analyze t.

In Silico Analysis Of Phytochemical Compound Found In Snake Fruit (Salacca Zalacca) Peel As Anti-Aging Agent, Ermi Girsang, Chrismis Novalinda Ginting, I Nyoman Ehrich Lister, Wahyu Widowati, Satrio Haryo Benowo Wibowo, Fajar Sukma Perdana, Rizal Rizal

The Thai Journal of Pharmaceutical Sciences

Skin aging is a complicated natural phenomenon characterized by progressive loss of structural integrity and physiological function of the skin. Snake fruit (Salacca zalacca) is an important fruit crop native from Indonesia. Its waste is a potential sour.

Various Nmdar Antagonists Decrease Interferon-Alpha Induced Depression Behavior In Mice Model Of Despair, Azadeh Mesripour, Ahmad Purhasani, Valiollah Hajhashemi

The Thai Journal of Pharmaceutical Sciences

Introduction: Treatment with interferon-alpha (IFNa) can induce depression that is likely the result of its effect on the tryptophan–kynurenine pathway. Kynurenine passes through the blood-brain barrier and breaks to neurotoxic metabolites, such as qui...

Hepatoprotective And Choleretic Activity Of Tanacetum Vulgare Flowers Extract, Oksana Ya. Mishchenko, Kateryna O. Kalko, Marharyta Yu. Zolotaikina, Tatyana M. Gontova, Victoria V. Mashtaler, Catherine Yu. Yurchenko, Lyudmyla V. Derymedvid, Anastasia Yu. Pozdniakova

The Thai Journal of Pharmaceutical Sciences

Objectives: The article presents the study of hepatoprotective and choleretic properties of Tanacetum vulgare flores dry extract (TVFDE) in vivo. Materials and Methods: The research was carried out using model of subchronic toxi? hepatitis in rats, caus..

Characterization And Potention Phytoestrogen Of Pigeon Pea (Cajanus Cajan L. Mill Sp.) On Rat Ovary, Cicilia Primiani, Pujiati Pujiati, Sutiman Sumitro

The Thai Journal of Pharmaceutical Sciences

Objectives: The objective of this study to analyze the estrogenic compounds in pigeon pea seeds and the effect of the plant seeds on the development of rat ovaries. Materials and method: Liquid chromatography-mass spectrometry (MS) and gas chromatography.

Screening Of Acetylcholinesterase Inhibitory Activity In Essential Oil From Myrtaceae, Vipaporn Sareedenchai

The Thai Journal of Pharmaceutical Sciences

Objective: This research was to investigate acetylcholinesterase inhibitory activity of the essential oil from Myrtaceae and its components. Methods: The essential oils were extracted from fresh leave of Myrtaceae plants: Eucalyptus globulus Labill (Euca.

Physicochemical Characters And Fatty Acid Composition Of Payena Lucida Seed Oils, Penpun Wetwitayaklung

The Thai Journal of Pharmaceutical Sciences

Introduction: Payena lucida A.DC. seed oil has long been used as edible oil and treating various kinds of diseases as oral and topical applications in some local areas of Myanmar. Objectives: This research aimed to identify and qualify the physicochemi...

Microwave-Assisted Synthesis, In Silico Studies And In Vivo Evaluation For Antidiabetic Activity Of New Brominated Pyrazoline Analogues, Neni Frimayanti, Jasril Jasril, Ihsan Ikhtiarudin, Syilfia Hasti, Anisa Indah Reza

The Thai Journal of Pharmaceutical Sciences

Introduction: Pyrazolines have played crucial role in the drug discovery researches and have been used widely as an important pharmacophores or intermediet for synthesis of bioactive compounds. Objective: The aim of this work is to explore the potentia...

Association Between The Appropriate Antimicrobial Therapy And Clinical Outcomes In Patients With Sepsis, Ploylarp Lertvipapath, Chankit Puttilerpong, Peerawong Werarak, Tipa Chakorn, Nasikarn Angkasekwinai, Napakadol Noppakusomboon, Apichaya Monsomboon

The Thai Journal of Pharmaceutical Sciences

Sepsis is leading cause of death in hospitals, but appropriate antimicrobial therapy canreduce the mortality rate and improve the clinical outcome. This prospective studyanalyzed the association between appropriate antimicrobial therapy and clinical outc.

Raman Spectroscopic Analysis Of Saliva For The Diagnosis Of Oral Cancer: A Systematic Review, Genecy Calado, Isha Behl, Amuthachelvi Daniel, Hugh Byrne, Fiona Lyng

Articles

Abstract Oral squamous cell carcinoma (OSCC) is one of the most common malignancies worldwide, and new protocols for routine and early detection are required. Raman spectroscopy is an optical based method that can provide sensitive and non-invasive real time detailed information on the biochemical content of a sample like saliva, through the unique vibrations of its constituent molecules and this is sensitive to changes associated with disease. A comprehensive systematic review of the available scientific literature related to Raman spectroscopy of human saliva for diagnosis of OSCC was performed. The 785 nm laser line was most applied wavelength along with …

Numerically Modelling Time And Dose Dependent Cytotoxicity, Hugh Byrne, Marcus A. Maher

Articles

Dose-response curves are fundamental tools of in vitro toxicology, extensively employed in toxicant or drug screening. They are expressed by a variety of end-points and assays, measured at different time-points in a choice of cell-lines, but are typically quantified only using the mean concentration for 50% response (e.g. drug efficacy or pathway inhibition) as an indicator of overall effect. However, the response is the result of a complex and dynamic cascade of events which occur between the initial exposure and the measured end-point, and the characteristic rates of the contributing stages govern the dose response and ultimately the measured characteristic …

Principal Components Analysis Of Raman Spectral Data For Screening Of Hepatitis C Infection, A. Dita, H. Nawaz, T. Mahmood, M. Tahir, N. Rashid, Muhammad Mudassar, A.A.H. Alsaadi, Hugh Byrne

Articles

In the current study, Raman spectroscopy is employed for the identification of the biochemical changes taking place during the development of Hepatitis C. The Raman spectral data acquired from the human blood plasma samples of infected and healthy individuals is analysed by Principal Components Analysis and the Raman spectral markers of the Hepatitis C Virus (HCV) infection are identified. Spectral changes include those associated with nucleic acidsat720 cm−1, 1077 cm−1 1678 (CO stretching mode of dGTP of RNA), 1778 cm−1 (RNA), with proteins at 1641 cm−1(amide-I), 1721 cm−1(CC stretching of proteins) and lipids at 1738 cm−1(CO of ester group in …

The Analgesic-Like Properties Of Alcohol In Animal Models Of Chronic Pain, Bradley Neddenriep

Theses and Dissertations

Chronic pain and excessive alcohol consumption are individually problems in our society today. Alcohol Use Disorder (AUD) affects 15.1 million adult Americans each year. Chronic pain affects over 100 million people annually in the United States. However, there is growing evidence suggesting that these two conditions can often be interrelated with chronic pain increasing consumption of alcohol, and excessive alcohol consumption increasing pain that leaves a feedback cycle trapping millions of patients in an ever worsening spiral. Large population-based studies show an association between pain and alcohol abuse, suggesting a link between increased alcohol use and reduced pain. While rodent …

Structure-Activity Relationship Studies Of Synthetic Cathinones And Related Agents, Rachel A. Davies

Theses and Dissertations

Synthetic cathinones and related agents represent an international drug abuse problem, and at the same time an important class of clinically useful compounds. Structure-activity relationship studies are needed to elucidate molecular features underlying the pharmacology of these agents. Illicit methcathinone (i.e., MCAT), the prototype of the synthetic cathinone class, exists as a racemic mixture. Though the differences in potency and target selectivity between the positional and optical isomers of synthetic cathinones and related agents have been demonstrated to have important implications for abuse and therapeutic potential, the two MCAT isomers have never been directly compared at their molecular targets: the …

Molecular Targets Of Psychedelics And Their Role In Behavioral Models Of Hallucinogenic Action, Hiba Z. Vohra

Theses and Dissertations

Psychedelics are a subset of hallucinogenic drugs that exert their characteristic effects through agonist activity at the serotonin receptor 2A (5-HT_2A). In this study, I aimed to characterize the modulatory role of the metabotropic glutamate subtype 2 receptor (mGluR2) in the 5-HT_2A-specific rodent model of hallucinogenic action, head-twitch response (HTR). Secondly, I aimed to explore if 5-HT_2A agonist-induced deficits in prepulse inhibition (PPI) of the startle response, an additional model of hallucinogenic action, could be produced in mice. Though 5-HT_2A agonist-induced PPI deficits, which represent interruptions in normal sensorimotor gating, have been described in …

An Investigation On The Role Of Β-Arrestin 2, Protein Kinase C And Sex On The Mechanism Of Morphine Tolerance In The Mouse Ileum, Karan Hitesh Muchhala

Theses and Dissertations

Opioids such as morphine are frequently used in the clinic to treat pain. However, the perennial bane of chronic opioid use is the rapid development of tolerance to the analgesic effects but delayed development of tolerance to the respiratory depressant and constipating effects. As constipation is one of the most common opioid-related adverse effects in humans, it is important to delineate mechanisms that drive opioid tolerance in the ileum and lack of it in the colon. The overarching goal of this thesis was to investigate mechanisms of morphine tolerance in the ileum by comparing the mechanism of morphine tolerance in …