Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 43 for “"Chlorpyrifos"”.
-
Chlorpyrifos and chlorpyrifos oxon induce neurite retraction and cytoskeletal disruption in mouse N2a cells and human neural progenitor stem cells
… use of the organophosphorous insecticide chlorpyrifos (CPF) over recent decades has posed major concerns about its toxicity in humans. Sub-cytotoxic concentrations of CPF and its metabolite CPF-oxon (CPO) were known to inhibit neurite outgrowth in differentiating neural cells but little …
-
Detection and quantitation of diazinon and chlorpyrifos : a novel GC
… for detection and quantitation of diazinon and chlorpyrifos, two widely used pesticides in local water pathway. Solid phase extraction combined with GC/MS detection with selected ion monitoring was employed. In establishing calibration curves for GC/MS analysis, it may be impractical to use …
-
Toxicity of chlorpyrifos adsorbed on clay and humic acid to larval walleye
… most sensitive life stage of walleye exposed to chlorpyrifos, (3) evaluate the bioavailability of chlorpyrifos adsorbed on humic acid (HA) and Panther Creek (PC) clay to larval walleye (Stizostedion vitreum), and (4) determine the toxicity of Cedar River sediments and water to larval walleye. …
-
Dissipation and Leachability of Formulated Chlorpyrifos and Atrazine in Organically-amended Soils
… containing high concentrations of formulated chlorpyrifos (5 mg kg-1 Dursban® 4E) and atrazine (5 mg kg-1 AAtrex® 4L) using amendments including lignocellulosic sorbents, microbial nutrients (vegetable oil, corn meal and fertilizers), and microbial extracts from organic media previously …
-
Exploring the Harmful Health Effects of Chlorpyrifos on Children: An Argument for Policy Reform
<p>Chlorpyrifos is an organophosphate neurotoxic insecticide, which poses a significant risk to children’s health. Exposure to chlorpyrifos during childhood, infancy and pregnancy has been linked to autism, ADHD, developmental delays, and lower IQ. My internship at the Natural Resources Defense …
-
The mobility of endosulfan and chlorpyrifos in the soils of the Hex River Valley
… samples. The two pesticides, endosulfan and chlorpyrifos, were selected for the study based on their usage and toxicity. As an initial assessment a simple screening model was used to confirm that their potential to leach into groundwater, in the Hex River Valley, is low but that their …
-
Alternatives to chlorpyrifos in Virginia type peanut production for control of southern corn rootworm
Historically, the organophosphate insecticide chlorpyrifos was used to protect peanuts (Arachis hypogaea L.) from soil-dwelling insect pests. In 2022, its registration was canceled by the Environmental Protection Agency (EPA) for all food crops. The southern corn rootworm, Diabrotica …
-
Neurochemical Effects of Concurrent Exposure to Repeated Stress and Chlorpyrifos on the Central Nervous System
… of concurrent exposure to repeated stress and chlorpyrifos (CPF) on concentrations of excitatory amino acids, activities of cholinergic enzymes, and maximum binding density (Bmax) and equilibrium dissociation rate constant (Kd) of NMDA and total muscarinic receptors were studied in Long-Evans …
-
Studies concerning the fate of atrazine and chlorpyrifos in a biobased pesticide waste disposal system
… was the most effective steps for decreasing chlorpyrifos concentration. Activated carbon (AC) and rubber (R) were better at sorbing chlorpyrifos than the PM and SEW, even though the two sorbents were capable of removing approximately 95% chlorpyrifos from solution. Secondary columns of AC or …
-
A Genomic And Functional Analysis On The Impact Of Commercial Pesticides On Chlorpyrifos Degradation By Three Bacterial Consortia
Chlorpyrifos is an organophosphate pesticide widely used in agriculture. It is a potent environmental neurotoxin. There are many biological approaches to eradicate the impact of chlorpyrifos contamination from our environment. This research project focused on the potential bacterial degradation of …
-
Penetration and permanence of an organophosphate and a pyrethroid in structural wood for insect control
… on the penetration and permanence of 1.0% chlorpyrifos [0,0-diethyl 0-(3,5,6-trichloro-2-pyridyl) phosphorothioate], formulated as Dursban® TC (Dow Chemical Co.), in pine (Pinus spp.), spruce (Picea spp.), and fir (Abies spp.). Results indicated the highest degree of penetration in southern …
-
An assessment of pesticide use, contamination and impact on the environment and the health of people in Sierra Leone
… farmers. The research also studied the fate of chlorpyrifos (the most widely used pesticide) in Sierra Leone soils when applied using local methods used by farmers in Sierra Leone. Five hundred farmers and one hundred health workers across the country were interviewed. Fifty focused group …
-
PPE Effectiveness in Agricultural Settings
… how effective it actually is against exposure to chlorpyrifos, solvents and oils is unknown. Therefore, a pilot study has been created to get a more accurate estimate of whether or not there is pesticide breakthrough while wearing a half mask respirator and 15 mil nitrile gloves and if so, when …
-
Biochemical effects of organophosphorous compounds on cultured rat and human cardiomyocyte-like cells
… insecticides (diazinon and chlorpyrifos), and their acutely toxic metabolites (diazoxon and chlorpyrifos oxon) on rat H9c2 and human cardiomyocyte-like cells. The rat embryonic H9c2 myoblast cell line, which has the ability to differentiate into a cardiac muscle phenotype, …
-
Efecto de carbofuran y número de aplicaciones de chlorpyrifos sobre infestaciones de Spodoptera frugiperda (J.E. smith) (Lepidoptera: noctuidae) en maíz (Zea mays) en época de riego y primera
… efecto de carbofuran y número de aplicaciones de chlorpyrifos sobre la infestación de Spodopters trugiperla (J.E. Smith), (Lepidoptera: Noctuidae) y los rendimientos en el cultivo de mal (grano), en la época de riego y de primera de 1988, se establecieron dos ensayos en el Centro Nacional de …
-
Efecto de las aplicaciones de insecticida chlorpyrifos (Lorsban) sobre las poblaciones de plagas y enemigos naturales en el agroecosistema de maiz (Zea mays L.) época de riego, 1996
… propósito de evaluar el efecto del insecticida chlorpyrifos (lorsban)sobre las poblaciones de plagas y enemigos naturales en el agro ecosistema de maíz, se llevo a efecto el presente experimento en la finca Santa Rosa, Managua, durante la época de riego (febrero - junio)1996. Los tratamientos …
-
The study and optimization of the Enzyme Inhibition Bioassay 96 for the detection of organophosphate and carbamate compounds
… in this project were the pesticides carbaryl, chlorpyrifos, diazinon, dichlorvos, and parathion. The pesticides chlorpyrifos, diazinon, and parathion are organophosphorothioates, which are organophosphates with a P=S bond, and when these compounds are oxidized the compounds are converted to …
-
Aspects of chemical control of the old house borer, Hylotrupes bajulus (L.) (Coleoptera: Cerambycidae)
… the best penetration of the active ingredient, chlorpyrifos, is an Oil-based carrier for the formulated product Dursban® WT. Dursban® TC, another product containing chlorpyrifos, will penetrate the wood surface better when diluted with water, not with an oil-based carrier such as kerosene. …
Page 1 of 3