Highly sensitive label-free bio-interfacial colorimetric sensor based on silk fibroin-gold nanocomposite for facile detection of chlorpyrifos pesticide

Scientific Reports, Journal Year: 2020, Volume and Issue: 10(1)

Published: March 6, 2020

Abstract Herein, the preparation of gold nanoparticles-silk fibroin (SF-AuNPs) dispersion and its label-free colorimetric detection organophosphate pesticide, namely chlorpyrifos, at ppb level are reported. The silk solution was extracted from B. mori after performing degumming, dissolving dialysis steps. This used for synthesis nanoparticles in-situ without using any external reducing capping agent. X-ray Diffractometry (XRD), Field Emission Transmission Electron Microscopy (FETEM) along with Surface Plasmon Resonance based optical evaluation confirmed generation within SF matrix. resultant SF-AuNPs exhibited rapid excellent pesticide sensing response even 10 concentration. Effect additional parameters viz. pH, ionic concentration interference other samples also studied. Notably, selective which can be calibrated. Furthermore, this method extended to various simulated real life such as tap water, soil agricultural products including plant residues successfully detect presence chlorpyrifos pesticide. proposed sensor system is facile yet effective employed by novice rural population expert researchers alike. It exploited preliminary tool in water products.

Language: Английский

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Opportunities for evaluating chemical exposures and child health in the United States: the Environmental influences on Child Health Outcomes (ECHO) Program

Journal of Exposure Science & Environmental Epidemiology, Journal Year: 2020, Volume and Issue: 30(3), P. 397 - 419

Published: Feb. 17, 2020

Language: Английский

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Pesticide Application Practices and Knowledge among Small-Scale Local Rice Growers and Communities in Rwanda: A Cross-Sectional Study

International Journal of Environmental Research and Public Health, Journal Year: 2019, Volume and Issue: 16(23), P. 4770 - 4770

Published: Nov. 28, 2019

Background: Agriculture contributes a third of Rwanda’s GDP and is the main source income for rural households, with 80% total population involved in crop and/or livestock production. The Government Rwanda established Muvumba rice project 2011 amidst policy shift towards as national staple crop. However, indiscriminate use pesticides by local, low-income growers has raised concerns about potential human, animal ecosystem health impacts pesticide distribution application are not strictly regulated. Although can directly influence farmer ecosystems, little known small-scale farmers’ practices knowledge. We aimed to assess local understanding identify gaps knowledge on safe deviations from standards recommended practices. Methods: conducted cross-sectional study consisting observations interviews 206 Nyagatare District, Rwanda, March 2017. Descriptive statistical analyses (sample means, standard deviation range) were performed, we evaluated association between personal protective equipment (PPE) their education level literacy status. Results: Over 95% observed farmers did comply minimum use, respondents reported that they stored homes without protection measures. Education significantly associated PPE use. Additionally, 90% had experienced adverse effects after using including intense headache, dizziness, stomach cramps, skin pain itching, respiratory distress. All also animals around scheme (cattle, birds, fish) behaving abnormally or signs consistent exposure six months preceding study, which may be linked pesticide-contaminated water. Conclusions: Our demonstrates high farmers, families, sharing rice-growing downstream environments points need training effective

Language: Английский

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Environmental Chemicals and Autism: A Scoping Review of the Human and Animal Research

Environmental Health Perspectives, Journal Year: 2019, Volume and Issue: 127(4)

Published: April 1, 2019

Background: Estimates of autism prevalence have increased dramatically over the past two decades. Evidence suggests environmental factors may contribute to etiology disorder. Objectives: This scoping review aimed identify and categorize primary research reviews on association between prenatal early postnatal exposure chemicals development in epidemiological studies rodent models autism. Methods: PubMed was searched through 8 February 2018. Included assessed prior 2 months age humans or 14 d rodents. Rodent were considered relevant if they included at least one measurement reciprocal social communicative behavior repetitive stereotyped behavior. Study details are presented interactive displays using Tableau Public. Results: The search returned 21,603 unique studies, which 54 46 experimental 50 deemed relevant, covering 152 chemical exposures. most frequently studied exposures particulate matter (n=14), mercury nonspecific air pollution (n=10), lead (n=10). In chlorpyrifos (n=9), (n=6), (n=4). Discussion: Although is growing rapidly, wide variability exists study design conduct, investigated, outcomes assessed. Conclusions focus recommendations guide best practices epidemiology toxicology, including greater harmonization across these fields more quickly efficiently concern. particular, we recommend chlorpyrifos, lead, polychlorinated biphenyls (PCBs) be systematically reviewed order assess their relationship with There a pressing need move forward understand influences answer current regulatory questions inform treatment prevention efforts. https://doi.org/10.1289/EHP4386

Language: Английский

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Exposure to environmental neurotoxic substances and neurodevelopment in children from Latin America and the Caribbean

Environmental Research, Journal Year: 2020, Volume and Issue: 192, P. 110199 - 110199

Published: Sept. 15, 2020

Language: Английский

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