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Kwon HB, Song WY, Lee TH, Lee SS, Kim YJ. Monitoring the Effective Density of Airborne Nanoparticles in Real Time Using a Microfluidic Nanoparticle Analysis Chip. ACS Sens 2021; 6:137-147. [PMID: 33404228 DOI: 10.1021/acssensors.0c01986] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Determining the effective density of airborne nanoparticles (NPs; particles smaller than 100 nm in diameter) at a point of interest is essential for toxicology and environmental studies, but it currently requires complex analysis systems comprising several high-precision instruments as well as a specially trained operator. To address these limitations, a field-portable and cost-efficient microfluidic NP analysis device is presented, which provides quantitative information on the effective density and size distribution of NPs in real time. Unlike conventional analysis systems, the device can operate in a standalone mode because of the chip operating principle based on the electrostatic/inertial classification and electrical detection methods. Moreover, the device is both compact (16.0 × 10.9 × 8.6 cm3) and light (950 g) owing to the hardware strip down enabled by integrating the essential functions for effective density analysis on a single chip. Quantitative experiments performed to simulate real-life applications utilizing effective density (i.e., effective density-based morphology analysis on engineered NPs and multi-parametric NP monitoring in ambient air) demonstrate that the developed device can be used as an analysis tool in toxicological studies as an on-site sensor for the monitoring of individual NP exposure and environments, for quality monitoring of engineered NPs via aerosol synthesis, and other applications.
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Affiliation(s)
- Hong-Beom Kwon
- School of Mechanical Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Woo-Young Song
- School of Mechanical Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Tae-Hoon Lee
- School of Mechanical Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Seung-Soo Lee
- School of Mechanical Engineering, Yonsei University, Seoul 03722, Republic of Korea
| | - Yong-Jun Kim
- School of Mechanical Engineering, Yonsei University, Seoul 03722, Republic of Korea
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2
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Virji MA, Kurth L. Peak Inhalation Exposure Metrics Used in Occupational Epidemiologic and Exposure Studies. Front Public Health 2021; 8:611693. [PMID: 33490023 PMCID: PMC7820770 DOI: 10.3389/fpubh.2020.611693] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Accepted: 12/07/2020] [Indexed: 12/24/2022] Open
Abstract
Peak exposures are of concern because they can potentially overwhelm normal defense mechanisms and induce adverse health effects. Metrics of peak exposure have been used in epidemiologic and exposure studies, but consensus is lacking on its definition. The relevant characteristics of peak exposure are dependent upon exposure patterns, biokinetics of exposure, and disease mechanisms. The objective of this review was to summarize the use of peak metrics in epidemiologic and exposure studies. A comprehensive search of Medline, Embase, Web of Science, and NIOSHTIC-2 databases was conducted using keywords related to peak exposures. The retrieved references were reviewed and selected for indexing if they included a peak metric and met additional criteria. Information on health outcomes and peak exposure metrics was extracted from each reference. A total of 1,215 epidemiologic or exposure references were identified, of which 182 were indexed and summarized. For the 72 epidemiologic studies, the health outcomes most frequently evaluated were: chronic respiratory effects, cancer and acute respiratory symptoms. Exposures were frequently assessed using task-based and full-shift time-integrated methods, qualitative methods, and real-time instruments. Peak exposure summary metrics included the presence or absence of a peak event, highest exposure intensity and frequency greater than a target. Peak metrics in the 110 exposure studies most frequently included highest exposure intensity, average short-duration intensity, and graphical presentation of the real-time data (plots). This review provides a framework for considering biologically relevant peak exposure metrics for epidemiologic and exposure studies to help inform risk assessment and exposure mitigation.
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Affiliation(s)
- M Abbas Virji
- Respiratory Health Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV, United States
| | - Laura Kurth
- Respiratory Health Division, National Institute for Occupational Safety and Health, Centers for Disease Control and Prevention, Morgantown, WV, United States
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3
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Davoudi M, Moradi-Sardareh H, Emamgholipour S, Nabatchian F, Paknejad M. The possible effect of silver nanoparticles on glyceraldehyde-3-phosphate dehydrogenase activity and formation of amyloid-like aggregates in MCF-7 cell line. IUBMB Life 2020; 72:2214-2224. [PMID: 32819028 DOI: 10.1002/iub.2362] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 07/02/2020] [Accepted: 07/08/2020] [Indexed: 11/06/2022]
Abstract
Silver nanoparticles (AgNPs) are widely used in medicine, however, the underlying mechanisms of their action on cellular signaling have not been completely determined, and fundamental studies are required to clarify them. We aimed to investigate AgNPs effects on glyceraldehyde-3-phosphate dehydrogenase (GAPDH) as both the internal control gene and the redox-sensitive enzyme involved in apoptosis-related pathways and the formation of amyloid aggregates. To achieve this purpose, MCF-7 cells were treated with different concentrations (0, 3, 22, and 200 μg/ml) of AgNPs and then cell viability, generation of reactive oxygen species (ROS), induction of apoptosis, expression of GAPDH gene, the formation of amyloid aggregates, and GAPDH activity were assessed. The results indicated that treatment with AgNPs significantly reduced cell viability and increased apoptosis in a dose-dependent manner. The ROS levels increased at lower concentrations of AgNPs (up to 22 μg/ml) and during short-term exposure (30 min). The level of GAPDH gene expression was significantly upregulated by 1.22, 1.47, and 1.56 fold, in the concentrations of 3, 22, and 200 μg/ml, respectively. The amount of amyloid aggregates was significantly increased in a dose-dependent manner. The results of enzyme activity showed that AgNPs were affected on the activity of GAPDH protein, however, it has fluctuated that could not be interpreted by our limited data. In conclusion, our results suggested that AgNPs could affect the GAPDH gene expression and enzyme activity, therefore the selection of GAPDH as a gene and protein internal control in the (AgNPs)-related studies requires careful consideration. Additionally, AgNPs may cause apoptosis due to the increase in the production of amyloid aggregates.
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Affiliation(s)
- Maryam Davoudi
- Department of Medical Laboratory, School of Allied Health Medicine, Tehran University of Medical Sciences, Tehran, Iran.,Department of Clinical Biochemistry, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Hemen Moradi-Sardareh
- Department of Clinical Biochemistry, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Solaleh Emamgholipour
- Department of Clinical Biochemistry, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Fariba Nabatchian
- Department of Medical Laboratory, School of Allied Health Medicine, Tehran University of Medical Sciences, Tehran, Iran
| | - Maliheh Paknejad
- Department of Clinical Biochemistry, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
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Vidal JC, Torrero D, Menés S, de La Fuente A, Castillo JR. Voltammetric sensing of silver nanoparticles on electrodes modified with selective ligands by using covalent and electropolymerization procedures. Discrimination between silver(I) and metallic silver. Mikrochim Acta 2020; 187:183. [PMID: 32088789 DOI: 10.1007/s00604-020-4139-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2019] [Accepted: 01/24/2020] [Indexed: 02/07/2023]
Abstract
New electrochemical sensors are described for the rapid quantification of silver nanoparticles (AgNPs). They are based on the immobilization of L-cysteine on a glassy carbon electrode (GCE) and on the formation of electropolymerized oligomers on the GCE. Ligands with amino, sulfur and carboxy functional groups are used that are capable of selectively retaining AgNPs. The experimental conditions for electropolymerizations were optimized for each of four monomers studied: L-lysine, thiophene-3-carboxamide, thionin, and o-phenylene-diamine. The best retention capabilities and conditions for quantification of AgNPs were found for immobilized nanoparticle voltammetry. This method is more sensitive than others based on the sorption of AgNPs from dispersions. These ligands also retain ionic silver species. Hence, Ag(I) and Ag0 can be discriminated, and the total silver content can be quantified by stripping voltammetry. The best analytical properties (for dispersions of AgNPs of 40 nm diameter) were found with GCEs carrying electropolymerized L-lysine. Figures of merit include (a) sensitivity of 4.329 ± 0.031 μA μg-1 mL cm-2, (b) a detection limit of 0.010 μg mL-1, and (c) a relative standars deviation of about 7.2% (for n = 4). The poly-L-lysine sensors can also evaluate the size of the AgNPs in the range 20 to 80 nm diameter, owing to displacements of the maximum potential of the voltammetry peaks. Graphical abstractSchematic representation of the quantification of silver nanoparticles (AgNPs) with a glassy-carbon electrode (GCE) modified with electropolymerized poly(L-lysine). AgNPs (and Ag+ ions) are selectively preconcentrated in the polymer and determined by differential-pulse stripping voltammetry.
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Affiliation(s)
- Juan C Vidal
- Analytical Spectroscopy and Sensors Group (GEAS), Institute of Environmental Sciences (IUCA), University of Zaragoza, c/ Pedro Cerbuna, 12, 50009, Zaragoza, Spain.
| | - Darío Torrero
- Analytical Spectroscopy and Sensors Group (GEAS), Institute of Environmental Sciences (IUCA), University of Zaragoza, c/ Pedro Cerbuna, 12, 50009, Zaragoza, Spain
| | - Sonia Menés
- Analytical Spectroscopy and Sensors Group (GEAS), Institute of Environmental Sciences (IUCA), University of Zaragoza, c/ Pedro Cerbuna, 12, 50009, Zaragoza, Spain
| | - Alvar de La Fuente
- Analytical Spectroscopy and Sensors Group (GEAS), Institute of Environmental Sciences (IUCA), University of Zaragoza, c/ Pedro Cerbuna, 12, 50009, Zaragoza, Spain
| | - Juan R Castillo
- Analytical Spectroscopy and Sensors Group (GEAS), Institute of Environmental Sciences (IUCA), University of Zaragoza, c/ Pedro Cerbuna, 12, 50009, Zaragoza, Spain
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Hurtado-Gallego J, Leganés F, Rosal R, Fernández-Piñas F. Use of Cyanobacterial Luminescent Bioreporters to Report on the Environmental Impact of Metallic Nanoparticles. SENSORS (BASEL, SWITZERLAND) 2019; 19:E3597. [PMID: 31430858 PMCID: PMC6721232 DOI: 10.3390/s19163597] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/26/2019] [Revised: 08/06/2019] [Accepted: 08/12/2019] [Indexed: 11/16/2022]
Abstract
Due to their ecological relevance, low cost, and easy maintenance, cyanobacteria have been used for bioreporter development. In this study, a battery of cyanobacterial bioreporters has been used to assess the ecotoxicity of four highly used metallic nanoparticles (NPs). The toxicity of these NPs was tested using the bioreporter Nostoc CPB4337 (Anabaena CPB4337). As oxidative stress is a primary toxic mechanism of metallic NPs, cyanobacterial reactive oxygen species (ROS)-detecting bioreporters were used. Metallic NPs release metal ions, which contribute to their toxic effect and the formation of ROS, so a metal-detecting bioreporter was also used to detect the bioavailable metals. The results confirm that ROS production by NPs was due to the NPs per se and not by released free-ions, which in fact were almost undetectable. Although the metal-detecting bioreporter could not detect the dissolved metal ions, it was able to detect the metallic NPs themselves, indicating that this bioreporter may be useful to detect them in the environment. ROS production varied depending on the growth medium or environmental matrices conditions and on the NP type. This work demonstrated the different levels of ROS production by metallic NPs and the importance of nanotoxicology studies in real matrices.
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Affiliation(s)
- Jara Hurtado-Gallego
- Departamento de Biología, Facultad de ciencias, Universidad Autónoma de Madrid, 28029 Madrid, Spain
| | - Francisco Leganés
- Departamento de Biología, Facultad de ciencias, Universidad Autónoma de Madrid, 28029 Madrid, Spain
| | - Roberto Rosal
- Departamento de Ingeniería Química, Universidad de Alcalá, 28871 Alcalá de Henares, Spain
| | - Francisca Fernández-Piñas
- Departamento de Biología, Facultad de ciencias, Universidad Autónoma de Madrid, 28029 Madrid, Spain.
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Abad Tan S, Zoidl G, Ghafar-Zadeh E. A Multidisciplinary Approach Toward High Throughput Label-Free Cytotoxicity Monitoring of Superparamagnetic Iron Oxide Nanoparticles. Bioengineering (Basel) 2019; 6:E52. [PMID: 31185664 PMCID: PMC6631604 DOI: 10.3390/bioengineering6020052] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 05/24/2019] [Accepted: 06/05/2019] [Indexed: 12/12/2022] Open
Abstract
Abstract: This paper focuses on cytotoxicity examination of superparamagnetic iron oxide nanoparticles (SPIONs) using different methods, including impedance spectroscopy. Recent advances of SPIONs for clinical and research applications have triggered the need to understand their effects in cells. Despite the great advances in adapting various biological and chemical methods to assess in-vitro toxicity of SPIONs, less attention has been paid on the development of a high throughput label-free screening platform to study the interaction between the cells and nanoparticles including SPIONs. In this paper, we have taken the first step toward this goal by proposing a label-free impedimetric method for monitoring living cells treated with SPIONs. We demonstrate the effect of SPIONs on the adhesion, growth, proliferation, and viability of neuroblastoma 2A (N2a) cells using impedance spectroscopy as a label-free method, along with other standard microscopic and cell viability testing methods as control methods. Our results have shown a decreased viability of the cells as the concentration of SPIONs increases with percentages of 59%, 47%, and 40% for 100 µg/mL (C4), 200 µg/mL (C5), 300 µg/mL (C6), respectively. Although all SPIONs concentrations have allowed the growth of cells within 72 hours, C4, C5, and C6 showed slower growth compared to the control (C1). The growth and proliferation of N2a cells are faster in the absence or low concentration of SPIONS. The percent coefficient of variation (% CV) was used to compare cell concentrations obtained by TBDE assay and a Scepter cell counter. Results also showed that the lower the SPIONs concentration, the lower the impedance is expected to be in the sensing electrodes without the cells. Meanwhile, the variation of surface area (∆S) was affected by the concentration of SPIONs. It was observed that the double layer capacitance was almost constant because of the higher attachment of cells, the lower surface area coated by SPIONs. In conclusion, impedance changes of electrodes exposed to the mixture of cells and SPIONs offer a wide dynamic range (>1 MΩ using Electric Cell-substrate Impedance electrodes) suitable for cytotoxicity studies. Based on impedance based, viability testing and microscopic methods' results, SPIONs concentrations higher than 100 ug/mL and 300 ug/mL cause minor and major effects, respectively. We propose that a high throughput impedance-based label-free platform provides great advantages for studying SPIONs in a cell-based context, opening a window of opportunity to design and test the next generation of SPIONs with reduced toxicity for biomedical or medical applications.
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Affiliation(s)
- Sonia Abad Tan
- Biologically Inspired Sensors and Actuators Laboratory, Lassonde School of Engineering, York University, Ontario, Toronto M3J 1P3, Canada.
- Department of Biology, York University, Ontario, Toronto M3J 1P3, Canada.
| | - Georg Zoidl
- Department of Biology, York University, Ontario, Toronto M3J 1P3, Canada.
- Department of Psychology, York University, Ontario, Toronto M3J 1P3, Canada.
| | - Ebrahim Ghafar-Zadeh
- Biologically Inspired Sensors and Actuators Laboratory, Lassonde School of Engineering, York University, Ontario, Toronto M3J 1P3, Canada.
- Department of Biology, York University, Ontario, Toronto M3J 1P3, Canada.
- Department of Electrical Engineering and Computer Science, York University, Ontario, Toronto M3J 1P3, Canada.
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7
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Jagdale P, Ziegler D, Rovere M, Tulliani JM, Tagliaferro AA. Waste Coffee Ground Biochar: A Material for Humidity Sensors. SENSORS 2019; 19:s19040801. [PMID: 30781439 PMCID: PMC6412531 DOI: 10.3390/s19040801] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/20/2018] [Revised: 02/11/2019] [Accepted: 02/12/2019] [Indexed: 11/25/2022]
Abstract
Worldwide consumption of coffee exceeds 11 billion tons/year. Used coffee grounds end up as landfill. However, the unique structural properties of its porous surface make coffee grounds popular for the adsorption of gaseous molecules. In the present work, we demonstrate the use of coffee grounds as a potential and cheap source for biochar carbon. The produced coffee ground biochar (CGB) was investigated as a sensing material for developing humidity sensors. CGB was fully characterized by using laser granulometry, X-ray diffraction (XRD), Raman spectroscopy, field emission-scanning electron microscopy (FESEM), X-ray photoelectron spectroscopy (XPS), thermogravimetric analysis (TGA) and the Brunnauer Emmett Teller (BET) technique in order to acquire a complete understanding of its structural and surface properties and composition. Subsequently humidity sensors were screen printed using an ink-containing CGB with polyvinyl butyral (PVB) acting as a temporary binder and ethylene glycol monobutyral ether, Emflow, as an organic vehicle so that the proper rheological characteristics were achieved. Screen-printed films were the heated at 300 °C in air. Humidity tests were performed under a flow of 1.7 L/min in the relative humidity range 0–100% at room temperature. The initial impedance of the film was 25.2 ± 0.15 MΩ which changes to 12.3 MΩ under 98% humidity exposure. A sensor response was observed above 20% relative humidity (RH). Both the response and recovery times were reasonably fast (less than 2 min).
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Affiliation(s)
- Pravin Jagdale
- Center for Sustainable Future Technologies, Italian Institute of Technology (IIT), Via Livorno 60, 10144 Torino, Italy.
- Department of Applied Science and Technology (DISAT), Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy.
| | - Daniele Ziegler
- Department of Applied Science and Technology (DISAT), Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy.
- INSTM R.U PoliTO-LINCE Laboratory, Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy.
| | - Massimo Rovere
- Department of Applied Science and Technology (DISAT), Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy.
| | - Jean Marc Tulliani
- Department of Applied Science and Technology (DISAT), Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy.
- INSTM R.U PoliTO-LINCE Laboratory, Department of Applied Science and Technology, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy.
| | - And Alberto Tagliaferro
- Department of Applied Science and Technology (DISAT), Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy.
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Nicholas J, Chen H, Liu K, Venu I, Bolser D, Saleh NB, Bisesi JH, Castleman W, Lee Ferguson P, Sabo-Attwood T. Utilization of Near Infrared Fluorescence Imaging to Track and Quantify the Pulmonary Retention of Single-Walled Carbon Nanotubes in Mice. NANOIMPACT 2019; 14:100167. [PMID: 32818159 PMCID: PMC7430926 DOI: 10.1016/j.impact.2019.100167] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
As nanomaterials are used in a wide array of applications, investigations regarding health impacts associated with inhalation are a concern. Reports show that exposure to single-walled carbon nanotubes (SWCNTs) can induce fibrosis, allergic-type reactions, and pathogen susceptibility. Airway clearance is known to play a primary role in these disease states, yet SWCNT detection in biological systems is challenging. Common techniques, such as electron microscopy, lack spatial resolution and specificity to delineate SWCNTs in carbon-based organisms. Here we validated a near-infrared fluorescence imaging (NIRFI) system to track and semi-quantify SWCNTs over 21 days in tissues of mice exposed intratracheally to 1 dose of SWCNTs. In tandem, we optimized a NIRF-based spectrometry method to quantify SWCNTs, showing that NIRFI was consistent with SWCNT burdens quantified by NIRF spectroscopy in whole lung tissue homogenates. Finally, NIRFI was utilized to localize SWCNTs on lung tissue sections used for pathological analysis. Results revealed that SWCNTs remained in the lung over 21 days and were consistent with alveolar wall restructuring and granuloma formation. This study is the first to quantify SWCNTs in mouse lungs using both semi-quantitative tracking and quantitative mass measurements using NIRF, highlighting this as a sensitive and specific technique for assessing SWCNT clearance in vivo.
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Affiliation(s)
- Justine Nicholas
- Department of Environmental and Global Health, University of Florida, Gainesville, FL 32610, United States
- Department of Physiological Sciences, University of Florida, Gainesville, FL 32610, United States
| | - Hao Chen
- Department of Physiological Sciences, University of Florida, Gainesville, FL 32610, United States
| | - Keira Liu
- Department of Civil and Environmental Engineering, Nicholas School of the Environment, Duke University, Durham, NC, 27708, United States
| | - Indu Venu
- Department of Civil, Architectural and Environmental Engineering, University of Texas, Austin TX, 78712, United States
| | - Donald Bolser
- Department of Physiological Sciences, University of Florida, Gainesville, FL 32610, United States
| | - Navid B. Saleh
- Department of Civil, Architectural and Environmental Engineering, University of Texas, Austin TX, 78712, United States
| | - Joseph H. Bisesi
- Department of Environmental and Global Health, University of Florida, Gainesville, FL 32610, United States
| | - William Castleman
- Department of Infectious Disease and Pathology, University of Florida, Gainesville, FL 32610, United States
| | - P. Lee Ferguson
- Department of Civil and Environmental Engineering, Nicholas School of the Environment, Duke University, Durham, NC, 27708, United States
| | - Tara Sabo-Attwood
- Department of Environmental and Global Health, University of Florida, Gainesville, FL 32610, United States
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Houseman EA, Virji MA. A Bayesian Approach for Summarizing and Modeling Time-Series Exposure Data with Left Censoring. Ann Work Expo Health 2018; 61:773-783. [PMID: 28810680 DOI: 10.1093/annweh/wxx046] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Objective Direct reading instruments are valuable tools for measuring exposure as they provide real-time measurements for rapid decision making. However, their use is limited to general survey applications in part due to issues related to their performance. Moreover, statistical analysis of real-time data is complicated by autocorrelation among successive measurements, non-stationary time series, and the presence of left-censoring due to limit-of-detection (LOD). A Bayesian framework is proposed that accounts for non-stationary autocorrelation and LOD issues in exposure time-series data in order to model workplace factors that affect exposure and estimate summary statistics for tasks or other covariates of interest. Method A spline-based approach is used to model non-stationary autocorrelation with relatively few assumptions about autocorrelation structure. Left-censoring is addressed by integrating over the left tail of the distribution. The model is fit using Markov-Chain Monte Carlo within a Bayesian paradigm. The method can flexibly account for hierarchical relationships, random effects and fixed effects of covariates. The method is implemented using the rjags package in R, and is illustrated by applying it to real-time exposure data. Estimates for task means and covariates from the Bayesian model are compared to those from conventional frequentist models including linear regression, mixed-effects, and time-series models with different autocorrelation structures. Simulations studies are also conducted to evaluate method performance. Results Simulation studies with percent of measurements below the LOD ranging from 0 to 50% showed lowest root mean squared errors for task means and the least biased standard deviations from the Bayesian model compared to the frequentist models across all levels of LOD. In the application, task means from the Bayesian model were similar to means from the frequentist models, while the standard deviations were different. Parameter estimates for covariates were significant in some frequentist models, but in the Bayesian model their credible intervals contained zero; such discrepancies were observed in multiple datasets. Variance components from the Bayesian model reflected substantial autocorrelation, consistent with the frequentist models, except for the auto-regressive moving average model. Plots of means from the Bayesian model showed good fit to the observed data. Conclusion The proposed Bayesian model provides an approach for modeling non-stationary autocorrelation in a hierarchical modeling framework to estimate task means, standard deviations, quantiles, and parameter estimates for covariates that are less biased and have better performance characteristics than some of the contemporary methods.
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Affiliation(s)
- E Andres Houseman
- Oregon State University, College of Public Health and Human Sciences, 101 Milam Hall, 2520 SW Campus Way, Corvallis, OR 97331, USA
| | - M Abbas Virji
- National Institute for Occupational Safety and Health, Respiratory Health Division, 1095 Willowdale Rd, Morgantown, WV 26505, USA
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10
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Torres R, Diz VE, Lagorio MG. Effects of gold nanoparticles on the photophysical and photosynthetic parameters of leaves and chloroplasts. Photochem Photobiol Sci 2018; 17:505-516. [DOI: 10.1039/c8pp00067k] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Interaction between light and plants containing gold nanoparticles: a deep insight into the physicochemical processes taking place.
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Affiliation(s)
- Rocio Torres
- CONICET - Universidad de Buenos Aires
- Instituto de Química Física de los Materiales
- Medio Ambiente y Energía (INQUIMAE)
- Buenos Aires
- Argentina
| | - Virginia E. Diz
- Universidad de Buenos Aires
- Facultad de Ciencias Exactas y Naturales
- Departamento de Química Inorgánica
- Analítica y Química Física
- Buenos Aires
| | - M. Gabriela Lagorio
- CONICET - Universidad de Buenos Aires
- Instituto de Química Física de los Materiales
- Medio Ambiente y Energía (INQUIMAE)
- Buenos Aires
- Argentina
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11
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Pradhan S, Mailapalli DR. Interaction of Engineered Nanoparticles with the Agri-environment. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2017; 65:8279-8294. [PMID: 28876911 DOI: 10.1021/acs.jafc.7b02528] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Nanoparticles with their unique surface properties can modulate the physiological, biochemical, and physicochemical pathways, such as photosynthesis, respiration, nitrogen metabolism, and solute transport. In this context, researchers have developed a wide range of engineered nanomaterials (ENMs) for the improvement of growth and productivity by modulating the metabolic pathways in plants. This class of tailor-made materials can potentially lead to the development of a new group of agrochemical nanofertilizers. However, there are reports that engineered nanomaterials could impart phytotoxicity to edible and medicinal plants. On the contrary, there is a series of ENMs that might be detrimental when applied directly and/or indirectly to the plants. These particles can sometimes readily aggregate and dissolute in the immediate vicinity; the free ions released from the nanomatrix can cause serious tissue injury and membrane dysfunction to the plant cell through oxidative stress. On that note, thorough studies on uptake, translocation, internalization, and nutritional quality assessment must be carried out to understand ENM-plant interactions. This review critically discusses the possible beneficial or adverse aftereffect of nanofertilizers in the immediate environment to interrelate the impacts of ENMs on the crop health and food security management.
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Affiliation(s)
- Saheli Pradhan
- Agricultural and Food Engineering Department, Indian Institute of Technology (IIT) Kharagpur , Kharagpur, West Bengal 721302, India
| | - Damodhara Rao Mailapalli
- Agricultural and Food Engineering Department, Indian Institute of Technology (IIT) Kharagpur , Kharagpur, West Bengal 721302, India
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12
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Silver nanoparticles: Significance of physicochemical properties and assay interference on the interpretation of in vitro cytotoxicity studies. Toxicol In Vitro 2016; 38:179-192. [PMID: 27816503 DOI: 10.1016/j.tiv.2016.10.012] [Citation(s) in RCA: 133] [Impact Index Per Article: 16.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2016] [Revised: 09/29/2016] [Accepted: 10/31/2016] [Indexed: 01/08/2023]
Abstract
Silver nanoparticles (AgNPs) have generated a great deal of interest in the research, consumer product, and medical product communities due to their antimicrobial and anti-biofouling properties. However, in addition to their antimicrobial action, concerns have been expressed about the potential adverse human health effects of AgNPs. In vitro cytotoxicity studies often are used to characterize the biological response to AgNPs and the results of these studies may be used to identify hazards associated with exposure to AgNPs. Various factors, such as nanomaterial size (diameter), surface area, surface charge, redox potential, surface functionalization, and composition play a role in the development of toxicity in in vitro test systems. In addition, the interference of AgNPs with in vitro cytotoxicity assays may result in false negative or false positive results in some in vitro biological tests. The goal of this review is to: 1) summarize the impact of physical-chemical parameters, including size, shape, surface chemistry and aggregate formation on the in vitro cytotoxic effects of AgNPs; and 2) explore the nature of AgNPs interference in in vitro cytotoxicity assays.
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Laborda F, Bolea E, Cepriá G, Gómez MT, Jiménez MS, Pérez-Arantegui J, Castillo JR. Detection, characterization and quantification of inorganic engineered nanomaterials: A review of techniques and methodological approaches for the analysis of complex samples. Anal Chim Acta 2016; 904:10-32. [DOI: 10.1016/j.aca.2015.11.008] [Citation(s) in RCA: 199] [Impact Index Per Article: 24.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 11/07/2015] [Accepted: 11/13/2015] [Indexed: 10/22/2022]
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Kafi MA, Cho HY, Choi JW. Neural Cell Chip Based Electrochemical Detection of Nanotoxicity. NANOMATERIALS (BASEL, SWITZERLAND) 2015; 5:1181-1199. [PMID: 28347059 PMCID: PMC5304640 DOI: 10.3390/nano5031181] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/21/2015] [Revised: 06/26/2015] [Accepted: 06/29/2015] [Indexed: 12/13/2022]
Abstract
Development of a rapid, sensitive and cost-effective method for toxicity assessment of commonly used nanoparticles is urgently needed for the sustainable development of nanotechnology. A neural cell with high sensitivity and conductivity has become a potential candidate for a cell chip to investigate toxicity of environmental influences. A neural cell immobilized on a conductive surface has become a potential tool for the assessment of nanotoxicity based on electrochemical methods. The effective electrochemical monitoring largely depends on the adequate attachment of a neural cell on the chip surfaces. Recently, establishment of integrin receptor specific ligand molecules arginine-glycine-aspartic acid (RGD) or its several modifications RGD-Multi Armed Peptide terminated with cysteine (RGD-MAP-C), C(RGD)₄ ensure farm attachment of neural cell on the electrode surfaces either in their two dimensional (dot) or three dimensional (rod or pillar) like nano-scale arrangement. A three dimensional RGD modified electrode surface has been proven to be more suitable for cell adhesion, proliferation, differentiation as well as electrochemical measurement. This review discusses fabrication as well as electrochemical measurements of neural cell chip with particular emphasis on their use for nanotoxicity assessments sequentially since inception to date. Successful monitoring of quantum dot (QD), graphene oxide (GO) and cosmetic compound toxicity using the newly developed neural cell chip were discussed here as a case study. This review recommended that a neural cell chip established on a nanostructured ligand modified conductive surface can be a potential tool for the toxicity assessments of newly developed nanomaterials prior to their use on biology or biomedical technologies.
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Affiliation(s)
- Md Abdul Kafi
- Department of Microbiology and Hygiene, Bangladesh Agricultural University, Mymensigh-2202, Bangladesh.
- Interdisciplinary Program of Integrated Biotechnology, Sogang University, Seoul 121-742, Korea.
| | - Hyeon-Yeol Cho
- Department of Chemical and Bimolecular Engineering, Sogang University, Seoul 121-742, Korea.
| | - Jeong Woo Choi
- Interdisciplinary Program of Integrated Biotechnology, Sogang University, Seoul 121-742, Korea.
- Department of Chemical and Bimolecular Engineering, Sogang University, Seoul 121-742, Korea.
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15
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Girish YR, Sharath Kumar KS, Thimmaiah KN, Rangappa KS, Shashikanth S. ZrO2-β-cyclodextrin catalyzed synthesis of 2,4,5-trisubstituted imidazoles and 1,2-disubstituted benzimidazoles under solvent free conditions and evaluation of their antibacterial study. RSC Adv 2015. [DOI: 10.1039/c5ra13891d] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of 2,4,5-trisubstituted imidazoles and 1,2-disubstituted benzimidazoles catalyzed by ZrO2-supported-β-cyclodextrin (ZrO2-β-CD) under solvent free conditions have been synthesized and characterized by spectral methods.
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Affiliation(s)
- Yarabhally R. Girish
- Department of Studies in Chemistry
- Manasagangotri
- University of Mysore
- Mysore-570006
- India
| | | | | | | | - Sheena Shashikanth
- Department of Studies in Chemistry
- Manasagangotri
- University of Mysore
- Mysore-570006
- India
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Sasikala R, Rani SK, Easwaramoorthy D, Karthikeyan K. Lanthanum loaded CuO nanoparticles: synthesis and characterization of a recyclable catalyst for the synthesis of 1,4-disubstituted 1,2,3-triazoles and propargylamines. RSC Adv 2015. [DOI: 10.1039/c5ra05468k] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A click and three component A3 coupling reactions were achieved by lanthanum loaded CuO NPs under ultrasonication. 1,4-Disubstituted 1,2,3-triazoles and propargylamines were synthesized in a short reaction time with high regioselectivity and yields.
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Affiliation(s)
- R. Sasikala
- Department of Chemistry
- B. S. Abdur Rahman University
- Chennai-600 048
- India
| | - S. Kutti Rani
- Department of Chemistry
- B. S. Abdur Rahman University
- Chennai-600 048
- India
| | - D. Easwaramoorthy
- Department of Chemistry
- B. S. Abdur Rahman University
- Chennai-600 048
- India
| | - K. Karthikeyan
- Department of Chemistry
- B. S. Abdur Rahman University
- Chennai-600 048
- India
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Mallevre F, Fernandes TF, Aspray TJ. Silver, zinc oxide and titanium dioxide nanoparticle ecotoxicity to bioluminescent Pseudomonas putida in laboratory medium and artificial wastewater. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2014; 195:218-225. [PMID: 25261625 DOI: 10.1016/j.envpol.2014.09.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 08/28/2014] [Accepted: 09/02/2014] [Indexed: 05/29/2023]
Abstract
Bacteria based ecotoxicology assessment of manufactured nanoparticles is largely restricted to Escherichia coli bioreporters in laboratory media. Here, toxicity effects of model OECD nanoparticles (Ag NM-300K, ZnO NM-110 and TiO2 NM-104) were assessed using the switch-off luminescent Pseudomonas putida BS566::luxCDABE bioreporter in Luria Bertani (LB) medium and artificial wastewater (AW). IC50 values ∼4 mg L(-1), 100 mg L(-1) and >200 mg L(-1) at 1 h were observed in LB for Ag NM-300K, ZnO NM-110 and TiO2 NM-104, respectively. Similar results were obtained in AW for Ag NM-300K (IC50∼5 mg L(-1)) and TiO2 NM-104 (IC50>200 mg L(-1)) whereas ZnO NM-110 was significantly higher (IC50>200 mg L(-1)). Lower ZnO NM-110 toxicity in AW compared to LB was associated with differences in agglomeration status and dissolution rate. This work demonstrates the importance of nanoecotoxicological studies in environmentally relevant matrices.
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Affiliation(s)
- Florian Mallevre
- School of Life Sciences, NanoSafety Research Group, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK
| | - Teresa F Fernandes
- School of Life Sciences, NanoSafety Research Group, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK
| | - Thomas J Aspray
- School of Life Sciences, NanoSafety Research Group, Heriot-Watt University, Edinburgh EH14 4AS, Scotland, UK.
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Ashby J, Pan S, Zhong W. Size and surface functionalization of iron oxide nanoparticles influence the composition and dynamic nature of their protein corona. ACS APPLIED MATERIALS & INTERFACES 2014; 6:15412-9. [PMID: 25144382 PMCID: PMC4160264 DOI: 10.1021/am503909q] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
Nanoparticles (NPs) adsorb proteins when in the biological matrix, and the resulted protein corona could affect NP-cell interactions. The corona has a dynamic nature with the adsorbed proteins constantly exchanging with the free proteins in the matrix at various rates. The rapidly exchanging proteins compose the soft corona, which responds more dynamically to environment changes than the hard corona established by the ones with slow exchange rates. In the present study, the corona formed on the superparamagnetic iron oxide NPs (SPIONs) in human serum was studied by flow field-flow fractionation and ultracentrifugation, which rapidly differentiated the corona proteins based on their exchange rates. By varying the surface hydrophobicity of the SPIONs with a core size around 10 nm, we found out that, the more hydrophobic surface ligand attracted proteins with higher surface hydrophobicity and formed a more dynamic corona with a larger portion of the involved proteins with fast exchange rates. Increasing the core diameter of the SPIONs but keeping the surface ligand the same could also result in a more dynamic corona. A brief investigation of the effect on the cellular uptake of SPIONs using one selected corona protein, transferrin, was conducted. The result showed that, only the stably bound transferrin could significantly enhance cellular uptake, while transferrin bound in a dynamic nature had negligible impact. Our study has led to a better understanding of the relationship between the particle properties and the dynamic nature of the corona, which can help with design of nanomaterials with higher biocompatibility and higher efficacy in biosystems for biomedical applications.
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Affiliation(s)
- Jonathan Ashby
- Department of Chemistry and Institute for Integrative Genome Biology, University of California, Riverside, California 92521, United States
| | - Songqin Pan
- Department of Chemistry and Institute for Integrative Genome Biology, University of California, Riverside, California 92521, United States
| | - Wenwan Zhong
- Department of Chemistry and Institute for Integrative Genome Biology, University of California, Riverside, California 92521, United States
- E-mail:
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Rainieri S, Olasagasti M, Barranco A. Safety assessment of engineered metallic nanoparticles in foodstuff. QUALITY ASSURANCE AND SAFETY OF CROPS & FOODS 2014. [DOI: 10.3920/qas2013.0382] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Affiliation(s)
- S. Rainieri
- Food Research Division, AZTI-Tecnalia, Parque Tecnologico de Bizkaia, Astondo Bidea 609, 48160 Derio, Spain
| | - M. Olasagasti
- Food Research Division, AZTI-Tecnalia, Parque Tecnologico de Bizkaia, Astondo Bidea 609, 48160 Derio, Spain
| | - A. Barranco
- Food Research Division, AZTI-Tecnalia, Parque Tecnologico de Bizkaia, Astondo Bidea 609, 48160 Derio, Spain
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Okello VA, Gass S, Pyrgiotakis G, Du N, Lake A, Kariuki V, Sotiriou GA, Addolorato J, Demokritou P, Sadik OA. Capture, isolation and electrochemical detection of industrially-relevant engineered aerosol nanoparticles using poly (amic) acid, phase-inverted, nano-membranes. JOURNAL OF HAZARDOUS MATERIALS 2014; 279:365-374. [PMID: 25080157 DOI: 10.1016/j.jhazmat.2014.06.081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/06/2013] [Revised: 05/21/2014] [Accepted: 06/27/2014] [Indexed: 06/03/2023]
Abstract
Workplace exposure to engineered nanoparticles (ENPs) is a potential health and environmental hazard. This paper reports a novel approach for tracking hazardous airborne ENPs by applying online poly (amic) acid membranes (PAA) with offline electrochemical detection. Test aerosol (Fe2O3, TiO2 and ZnO) nanoparticles were produced using the Harvard (Versatile Engineered Generation System) VENGES system. The particle morphology, size and elemental composition were determined using SEM, XRD and EDS. The PAA membrane electrodes used to capture the airborne ENPs were either stand-alone or with electron-beam gold-coated paper substrates. Cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) were used to conceptually illustrate that exposure levels of industry-relevant classes of airborne nanoparticles could be captured and electrochemically detected at PAA membranes filter electrodes. CV parameters showed that PAA catalyzed the reduction of Fe2O3 to Fe(2+) with a size-dependent shift in reduction potential (E(0)). Using the proportionality of peak current to concentration, the amount of Fe2O3 was found to be 4.15×10(-17)mol/cm(3) PAA electrodes. Using EIS, the maximum phase angle (Φmax) and the interfacial charge transfer resistance (Rct) increased significantly using 100μg and 1000μg of TiO2 and ZnO respectively. The observed increase in Φmax and Rct at increasing concentration is consistent with the addition of an insulating layer of material on the electrode surface. The integrated VENGES/PAA filter sensor system has the potential to be used as a portable monitoring system.
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Affiliation(s)
- Veronica A Okello
- Department of Chemistry, Center for Advanced Sensors & Environmental Systems (CASE), State University of New York at Binghamton, P.O. Box 6000, Binghamton, NY 13902, United States
| | - Samuel Gass
- Center for Nanotechnology and Nanotoxicology, Harvard School of Public Health, Department of Environmental Health, 665 Huntington Avenue, Boston, MA 02115-6021, United States
| | - Georgios Pyrgiotakis
- Center for Nanotechnology and Nanotoxicology, Harvard School of Public Health, Department of Environmental Health, 665 Huntington Avenue, Boston, MA 02115-6021, United States
| | - Nian Du
- Department of Chemistry, Center for Advanced Sensors & Environmental Systems (CASE), State University of New York at Binghamton, P.O. Box 6000, Binghamton, NY 13902, United States
| | - Andrew Lake
- Department of Chemistry, Center for Advanced Sensors & Environmental Systems (CASE), State University of New York at Binghamton, P.O. Box 6000, Binghamton, NY 13902, United States
| | - Victor Kariuki
- Department of Chemistry, Center for Advanced Sensors & Environmental Systems (CASE), State University of New York at Binghamton, P.O. Box 6000, Binghamton, NY 13902, United States
| | - Georgios A Sotiriou
- Center for Nanotechnology and Nanotoxicology, Harvard School of Public Health, Department of Environmental Health, 665 Huntington Avenue, Boston, MA 02115-6021, United States
| | - Jessica Addolorato
- Department of Chemistry, Center for Advanced Sensors & Environmental Systems (CASE), State University of New York at Binghamton, P.O. Box 6000, Binghamton, NY 13902, United States
| | - Philip Demokritou
- Center for Nanotechnology and Nanotoxicology, Harvard School of Public Health, Department of Environmental Health, 665 Huntington Avenue, Boston, MA 02115-6021, United States.
| | - Omowunmi A Sadik
- Department of Chemistry, Center for Advanced Sensors & Environmental Systems (CASE), State University of New York at Binghamton, P.O. Box 6000, Binghamton, NY 13902, United States.
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Singh G, Stephan C, Westerhoff P, Carlander D, Duncan TV. Measurement Methods to Detect, Characterize, and Quantify Engineered Nanomaterials in Foods. Compr Rev Food Sci Food Saf 2014; 13:693-704. [PMID: 33412711 DOI: 10.1111/1541-4337.12078] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2014] [Accepted: 03/13/2014] [Indexed: 01/10/2023]
Abstract
This article is one of a series of 4 that reports on a task of the NanoRelease Food Additive project of the International Life Science Institute Center for Risk Science Innovation and Application to identify, evaluate, and develop methods that are needed to confidently detect, characterize, and quantify intentionally produced engineered nanomaterials (ENMs) released from food along the alimentary tract. This particular article focuses on the problem of detecting ENMs in food, paying special attention to matrix interferences and how to deal with them. In this review, an in-depth analysis of the literature related to detection of ENMs in complex matrices is presented. The literature review includes discussions of sampling methods, such as centrifugation and ENM extraction. Available analytical methods, as well as emerging methods, are also presented. The article concludes with a summary of findings and an overview of potential knowledge gaps and targets for method development in this area.
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Affiliation(s)
- Gurmit Singh
- Food Research Div, Bureau of Chemical Safety, Health Canada, 251 Sir Frederick Banting Driveway, Ottawa, Canada
| | - Chady Stephan
- PerkinElmer, Inc, 6 - 501 Rowntree Dairy Rd., Woodbridge, ON L4L 8H1, Canada
| | - Paul Westerhoff
- School of Sustainable Engineering and the Built Environment, Arizona State Univ, PO Box 875306, Tempe, AZ, 85287-5306, U.S.A
| | - David Carlander
- Nanotechnology Industries Assoc, 101 Ave. Louise, 1050 Brussels, Belgium
| | - Timothy V Duncan
- Center for Food Safety and Applied Nutrition, United States Food and Drug Administration, 6502 South Archer Rd., Bedford Park, IL 60516-1957, U.S.A
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Rozniecka E, Jonsson-Niedziolka M, Celebanska A, Niedziolka-Jonsson J, Opallo M. Selective electrochemical detection of dopamine in a microfluidic channel on carbon nanoparticulate electrodes. Analyst 2014; 139:2896-903. [DOI: 10.1039/c3an02207b] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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23
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Girish YR, Sharath Kumar KS, Muddegowda U, Lokanath NK, Rangappa KS, Shashikanth S. ZrO2-supported Cu(ii)–β-cyclodextrin complex: construction of 2,4,5-trisubstituted-1,2,3-triazoles via azide–chalcone oxidative cycloaddition and post-triazole alkylation. RSC Adv 2014. [DOI: 10.1039/c4ra09970b] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
The ZrO2–Cu2–β-CD complex is an excellent catalyst for the synthesis of N-2-alkylated-1,2,3-triazoles.
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Affiliation(s)
| | | | | | | | | | - Sheena Shashikanth
- Department of Studies in Chemistry
- University of Mysore
- Mysore-570006, India
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24
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Rahman MM, Khan SB, Asiri AM, Al-Sehemi AG. Chemical sensor development based on polycrystalline gold electrode embedded low-dimensional Ag2O nanoparticles. Electrochim Acta 2013. [DOI: 10.1016/j.electacta.2013.08.164] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
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Mohammadi R, Maali-Amiri R, Abbasi A. Effect of TiO2 nanoparticles on chickpea response to cold stress. Biol Trace Elem Res 2013; 152:403-10. [PMID: 23456351 DOI: 10.1007/s12011-013-9631-x] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Accepted: 02/11/2013] [Indexed: 11/26/2022]
Abstract
Nanoparticles (NPs) in agricultural systems can potentially be used as appropriate candidate for change in growth, development, productivity, and quality of plants. In the present study, we assessed the effect of TiO2 NP concentrations (0, 2, 5, and 10 ppm) on changes of membrane damage indexes like electrolyte leakage index (ELI) and malondialdehyde (MDA) during cold stress (CS) 4 °C in sensitive (ILC 533) and tolerant (Sel 11439) chickpea (Cicer arietinum L.) genotypes. Aggregation of NPs within the vacuole and chloroplast indicated absorbed NPs in seedlings. Bioaccumulation of NPs showed that, under thermal treatments, the sensitive genotype had more permeability to NPs compared to the tolerant one, and TiO2 content was higher during CS compared to optimum temperature. Physiological indexes were positively affected by NP treatments during thermal treatments. TiO2 NP treatments (especially 5 ppm) caused a decrease in ELI during thermal treatments, whereas ELI content under CS treatment increased at 0 ppm TiO2 in both genotypes. Under thermal treatments, although the genotype 11439 showed lower accumulation of MDA than ILC 533 genotype, a significant decrease was observed in MDA content at 5 ppm TiO2. Results showed that TiO2 treatments not only did not induce oxidative damage in sensitive and tolerant chickpea genotypes but also alleviated membrane damage indexes under CS treatment. It was suggested for the first time that TiO2 NPs improved redox status of the genotypes under thermal treatments. New findings possibly would reveal the use of NPs generally or TiO2 NPs especially for increase of cold tolerance in crops.
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Affiliation(s)
- Rahmat Mohammadi
- Department of Agronomy and Plant Breeding, University College of Agriculture and Natural Resources, University of Tehran, 31587-77871 Karaj, Iran
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Rahman MM, Gruner G, Al-Ghamdi MS, Daous MA, Khan SB, Asiri AM. Chemo-sensors development based on low-dimensional codoped Mn2O3-ZnO nanoparticles using flat-silver electrodes. Chem Cent J 2013; 7:60. [PMID: 23537000 PMCID: PMC3630067 DOI: 10.1186/1752-153x-7-60] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2013] [Accepted: 03/19/2013] [Indexed: 12/11/2022] Open
Abstract
BACKGROUND Semiconductor doped nanostructure materials have attained considerable attention owing to their electronic, opto-electronic, para-magnetic, photo-catalysis, electro-chemical, mechanical behaviors and their potential applications in different research areas. Doped nanomaterials might be a promising owing to their high-specific surface-area, low-resistances, high-catalytic activity, attractive electro-chemical and optical properties. Nanomaterials are also scientifically significant transition metal-doped nanostructure materials owing to their extraordinary mechanical, optical, electrical, electronic, thermal, and magnetic characteristics. Recently, it has gained significant interest in manganese oxide doped-semiconductor materials in order to develop their physico-chemical behaviors and extend their efficient applications. It has not only investigated the basic of magnetism, but also has huge potential in scientific features such as magnetic materials, bio- & chemi-sensors, photo-catalysts, and absorbent nanomaterials. RESULTS The chemical sensor also displays the higher-sensitivity, reproducibility, long-term stability, and enhanced electrochemical responses. The calibration plot is linear (r2 = 0.977) over the 0.1 nM to 50.0 μM 4-nitrophenol concentration ranges. The sensitivity and detection limit is ~4.6667 μA cm-2 μM-1 and ~0.83 ± 0.2 nM (at a Signal-to-Noise-Ratio, SNR of 3) respectively. To best of our knowledge, this is the first report for detection of 4-nitrophenol chemical with doped Mn2O3-ZnO NPs using easy and reliable I-V technique in short response time. CONCLUSIONS As for the doped nanostructures, NPs are introduced a route to a new generation of toxic chemo-sensors, but a premeditate effort has to be applied for doped Mn2O3-ZnO NPs to be taken comprehensively for large-scale applications, and to achieve higher-potential density with accessible to individual chemo-sensors. In this report, it is also discussed the prospective utilization of Mn2O3-ZnO NPs on the basis of carcinogenic chemical sensing, which could also be applied for the detection of hazardous chemicals in ecological, environmental, and health care fields.
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Affiliation(s)
- Mohammed M Rahman
- Center of Excellence for Advanced Materials Research (CEAMR), King Abdulaziz University, P,O, Box 80203, Jeddah, 21589, Saudi Arabia.
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Noël A, L'Espérance G, Cloutier Y, Plamondon P, Boucher J, Philippe S, Dion C, Truchon G, Zayed J. Assessment of the contribution of electron microscopy to nanoparticle characterization sampled with two cascade impactors. JOURNAL OF OCCUPATIONAL AND ENVIRONMENTAL HYGIENE 2013; 10:155-172. [PMID: 23356435 DOI: 10.1080/15459624.2012.760391] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This study assessed the contribution of electron microscopy to the characterization of nanoparticles and compared the degree of variability in sizes observed within each stage when sampled by two cascade impactors: an Electrical Low Pressure Impactor (ELPI) and a Micro-Orifice Uniform Deposit Impactor (MOUDI). A TiO(2) nanoparticle (5 nm) suspension was aerosolized in an inhalation chamber. Nanoparticles sampled by the impactors were collected on aluminum substrates or TEM carbon-coated copper grids using templates, specifically designed in our laboratories, for scanning and transmission electron microscopy (SEM, TEM) analysis, respectively. Nanoparticles were characterized using both SEM and TEM. Three different types of diameters (inner, outer, and circular) were measured by image analysis based on count and volume, for each impactor stage. Electron microscopy, especially TEM, is well suited for the characterization of nanoparticles. The MOUDI, probably because of the rotation of its collection stages, which can minimize the resuspension of particles, gave more stable results and smaller geometric standard deviations per stage. Our data suggest that the best approach to estimate particle size by electron microscopy would rely on geometric means of measured circular diameters. Overall, the most reliable data were provided by the MOUDI and the TEM sampling technique on carbon-coated copper grids for this specific experiment. This study indicates interesting findings related to the assessment of impactors combined with electron microscopy for nanoparticle characterization. For future research, since cascade impactors are extensively used to characterize nano-aerosol exposure scenarios, high-performance field emission scanning electron microscopy (FESEM) should also be considered.
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Affiliation(s)
- Alexandra Noël
- Département de Santé environnementale et Santé au travail, Faculté de Médecine, Université de Montréal, Montréal, Québec, Canada
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28
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The role of the lateral dimension of graphene oxide in the regulation of cellular responses. Biomaterials 2012; 33:4013-21. [DOI: 10.1016/j.biomaterials.2012.02.021] [Citation(s) in RCA: 305] [Impact Index Per Article: 25.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2011] [Accepted: 02/07/2012] [Indexed: 11/24/2022]
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29
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Medina-Sánchez M, Miserere S, Merkoçi A. Nanomaterials and lab-on-a-chip technologies. LAB ON A CHIP 2012; 12:1932-43. [PMID: 22517169 DOI: 10.1039/c2lc40063d] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Lab-on-a-chip (LOC) platforms have become important tools for sample analysis and treatment with interest for DNA, protein and cells studies or diagnostics due to benefits such as the reduced sample volume, low cost, portability and the possibility to build new analytical devices or be integrated into conventional ones. These platforms have advantages of a wide set of nanomaterials (NM) (i.e. nanoparticles, quantum dots, nanowires, graphene etc.) and offer excellent improvement in properties for many applications (i.e. detectors sensitivity enhancement, biolabelling capability along with other in-chip applications related to the specificities of the variety of nanomaterials with optical, electrical and/or mechanical properties). This review covers the last trends in the use of nanomaterials in microfluidic systems and the related advantages in analytical and bioanalytical applications. In addition to the applications of nanomaterials in LOCs, we also discuss the employment of such devices for the production and characterization of nanomaterials. Both framed platforms, NMs based LOCs and LOCs for NMs production and characterization, represent promising alternatives to generate new nanotechnology tools for point-of-care diagnostics, drug delivery and nanotoxicology applications.
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Affiliation(s)
- Mariana Medina-Sánchez
- Nanobioelectronics & Biosensors Group, Institut Català de Nanotecnologia, Campus UAB, Bellaterra, Barcelona-Spain
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Zänker H, Schierz A. Engineered nanoparticles and their identification among natural nanoparticles. ANNUAL REVIEW OF ANALYTICAL CHEMISTRY (PALO ALTO, CALIF.) 2012; 5:107-132. [PMID: 22482788 DOI: 10.1146/annurev-anchem-062011-143130] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
The more nanotechnology develops, the more likely the release of engineered nanoparticles into the environment becomes. Due to a huge excess of natural nanoparticles, the identification and quantification of engineered nanoparticles pose a big challenge to analysts. Moreover, identification in a qualitative sense and quantification by mass concentration alone are not sufficient, because the potential environmental hazard arising from engineered nanoparticles is controlled by many other properties of the particles. We discuss the most important methods of fractionation and detection of both natural and engineered nanoparticles, with a focus on the chemical nature of the particles, particle concentration, and particle size. Analyses should not rely on only one method; instead, several complementary methods should, if possible, be used. Coupled techniques should be further developed and increasingly applied. Dedicated techniques that are tailored to the search for a particular sort of engineered nanoparticles are more promising than universal approaches that search for any engineered nanoparticles.
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Affiliation(s)
- H Zänker
- Institute of Resource Ecology, Helmholtz-Zentrum Dresden-Rossendorf, D-01314 Dresden, Germany.
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Kroll A, Pillukat MH, Hahn D, Schnekenburger J. Interference of engineered nanoparticles with in vitro toxicity assays. Arch Toxicol 2012; 86:1123-36. [DOI: 10.1007/s00204-012-0837-z] [Citation(s) in RCA: 218] [Impact Index Per Article: 18.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2011] [Accepted: 03/01/2012] [Indexed: 10/28/2022]
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Singh Sekh B. Nanoprobes and Their Applications in Veterinary Medicine and Animal Health. ACTA ACUST UNITED AC 2012. [DOI: 10.3923/rjnn.2012.1.16] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Nanotoxicology and in vitro studies: The need of the hour. Toxicol Appl Pharmacol 2012; 258:151-65. [DOI: 10.1016/j.taap.2011.11.010] [Citation(s) in RCA: 386] [Impact Index Per Article: 32.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2011] [Revised: 11/12/2011] [Accepted: 11/15/2011] [Indexed: 12/13/2022]
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Abstract
Exploring the interior of a cell is of tremendous importance in order to assess the effects of nanomaterials on biological systems. Outside of a controlled laboratory environment, nanomaterials will most likely not be conveniently labeled or tagged so that their translocation within a biological system cannot be easily identified and quantified. Ideally, the characterization of nanomaterials within a cell requires a nondestructive, label-free, and subsurface approach. Subsurface nanoscale imaging represents a real challenge for instrumentation. Indeed the tools available for high resolution characterization, including optical, electron or scanning probe microscopies, mainly provide topography images or require taggants that fluoresce. Although the intercellular environment holds a great deal of information, subsurface visualization remains a poorly explored area. Recently, it was discovered that by mechanically perturbing a sample, it was possible to observe its response in time with nanoscale resolution by probing the surface with a micro-resonator such as a microcantilever probe. Microcantilevers are used as the force-sensing probes in atomic force microscopy (AFM), where the nanometer-scale probe tip on the microcantilever interacts with the sample in a highly controlled manner to produce high-resolution raster-scanned information of the sample surface. Taking advantage of the existing capabilities of AFM, we present a novel technique, mode synthesizing atomic force microscopy (MSAFM), which has the ability to probe subsurface structures such as non-labeled nanoparticles embedded in a cell. In MSAFM mechanical actuators (PZTs) excite the probe and the sample at different frequencies as depicted in the first figure of this chapter. The nonlinear nature of the tip-sample interaction, at the point of contact of the probe and the surface of the sample, in the contact mode AFM configuration permits the mixing of the elastic waves. The new dynamic system comprises new synthesized imaging modes, resulting from sum- and difference-frequency generation of the driving frequencies. The specific electronics of MSAFM allows the selection of individual modes and the monitoring of their amplitude and phase. From these quantities of various synthesized modes a series of images can be acquired. The new images contain subsurface information, thus revealing the presence of nanoparticles inside the cells.
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Stensberg MC, Wei Q, McLamore ES, Porterfield DM, Wei A, Sepúlveda MS. Toxicological studies on silver nanoparticles: challenges and opportunities in assessment, monitoring and imaging. Nanomedicine (Lond) 2011; 6:879-98. [PMID: 21793678 DOI: 10.2217/nnm.11.78] [Citation(s) in RCA: 259] [Impact Index Per Article: 19.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Silver nanoparticles (Ag NPs) are becoming increasingly prevalent in consumer products as antibacterial agents. The increased use of Ag NP-enhanced products may lead to an increase in toxic levels of environmental silver, but regulatory control over the use or disposal of such products is lagging due to insufficient assessment on the toxicology of Ag NPs and their rate of release into the environment. In this article we discuss recent research on the transport, activity and fate of Ag NPs at the cellular and organismic level, in conjunction with traditional and recently established methods of nanoparticle characterization. We include several proposed mechanisms of cytotoxicity based on such studies, as well as new opportunities for investigating the uptake and fate of Ag NPs in living systems.
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Affiliation(s)
- Matthew Charles Stensberg
- Department of Agricultural & Biological Engineering, Purdue University, 225 S University St., West Lafayette, IN 47907, USA
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Kikandi SN, Okello VA, Wang Q, Sadik OA, Varner KE, Burns SA. Size-exclusive nanosensor for quantitative analysis of fullerene C60. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2011; 45:5294-5300. [PMID: 21591755 DOI: 10.1021/es1043084] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
This paper presents the first development of a mass-sensitive nanosensor for the isolation and quantitative analyses of engineered fullerene (C₆₀) nanoparticles, while excluding mixtures of structurally similar fullerenes. Amino-modified beta-cyclodextrin (β-CD-NH₂) was synthesized and confirmed by ¹HNMR as the host molecule to isolate the desired fullerene C₆₀. This was subsequently assembled onto the surfaces of gold-coated quartz crystal microbalance (QCM) electrodes using N-dicyclohexylcarbodiimide/N-hydroxysuccinimide (DCC/NHS) surface immobilization chemistry to create a selective molecular configuration described as (Au)-S-(CH₂)²-CONH-beta-CD sensor. The mass change on the sensor configuration on the QCM was monitored for selective quantitative analysis of fullerene C₆₀ from a C₆₀/C₇₀ mixture and soil samples. About ~10¹⁴-10¹⁶ C₆₀ particles/cm² were successfully quantified by QCM measurements. Continuous spike of 200 μL of 0.14 mg C₆₀ /mL produced changes in frequency (-Δf) that varied exponentially with concentration. FESEM and time-of-flight secondary-ion mass spectrometry confirmed the validity of sensor surface chemistry before and after exposure to fullerene C₆₀. The utility of this sensor for spiked real-world soil samples has been demonstrated. Comparable sensitivity was obtained using both the soil and purified toluene samples. This work demonstrates that the sensor has potential application in complex environmental matrices.
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Affiliation(s)
- Samuel N Kikandi
- Center for Advanced Sensors & Environmental System (CASE), Department of Chemistry, State University of New York-Binghamton, Binghamton, New York 13902-6000, USA
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Musee N, Thwala M, Nota N. The antibacterial effects of engineered nanomaterials: implications for wastewater treatment plants. ACTA ACUST UNITED AC 2011; 13:1164-83. [DOI: 10.1039/c1em10023h] [Citation(s) in RCA: 128] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Teow Y, Asharani PV, Hande MP, Valiyaveettil S. Health impact and safety of engineered nanomaterials. Chem Commun (Camb) 2011; 47:7025-38. [DOI: 10.1039/c0cc05271j] [Citation(s) in RCA: 193] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Okello VA, Du N, Deng B, Sadik OA. Environmental applications of poly(amic acid)-based nanomaterials. ACTA ACUST UNITED AC 2011; 13:1236-45. [DOI: 10.1039/c1em10061k] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Bio-Inspired/-Functional Colloidal Core-Shell Polymeric-Based NanoSystems: Technology Promise in Tissue Engineering, Bioimaging and NanoMedicine. Polymers (Basel) 2010. [DOI: 10.3390/polym2030323] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Jacobs JF, van de Poel I, Osseweijer P. Sunscreens with Titanium Dioxide (TiO(2)) Nano-Particles: A Societal Experiment. NANOETHICS 2010; 4:103-113. [PMID: 20835397 PMCID: PMC2933802 DOI: 10.1007/s11569-010-0090-y] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Accepted: 05/17/2010] [Indexed: 05/03/2023]
Abstract
The risks of novel technologies, such as nano(bio)technology cannot be fully assessed due to the existing uncertainties surrounding their introduction into society. Consequently, the introduction of innovative technologies can be conceptualised as a societal experiment, which is a helpful approach to evaluate moral acceptability. This approach is illustrated with the marketing of sunscreens containing nano-sized titanium dioxide (TiO(2)) particles. We argue that the marketing of this TiO(2) nanomaterial in UV protective cosmetics is ethically undesirable, since it violates four reasonable moral conditions for societal experimentation (absence of alternatives, controllability, limited informed consent, and continuing evaluation). To remedy the current way nano-sized TiO(2) containing sunscreens are utilised, we suggest five complementing actions (closing the gap, setup monitoring tools, continuing review, designing for safety, and regulative improvements) so that its marketing can become more acceptable.
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Affiliation(s)
- Johannes F. Jacobs
- Department of Philosophy, School of Technology, Policy and Management, Delft University of Technology, Delft, The Netherlands
- Biotechnology and Society, Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands
| | - Ibo van de Poel
- Department of Philosophy, School of Technology, Policy and Management, Delft University of Technology, Delft, The Netherlands
| | - Patricia Osseweijer
- Biotechnology and Society, Department of Biotechnology, Delft University of Technology, Julianalaan 67, 2628 BC Delft, The Netherlands
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