Papers:
Multi-method analysis of multiwall carbon nanotube polymer nanocomposite after photodegradation
Petersen E.J., Lam T., Gorham J., Scott K., Long C., Sharma R., Sung L.P., Liddle J.A., Nguyen T., National Institute of Standards and Technology, US
Nanomaterials can be used as nanofillers to enhance the properties of polymeric materials. However, the effect of weathering on nanocomposites and the potential for nanomaterial release is not yet well known. This stems partly from [...]
Nanoaerosol release characteristics of wallpaper coated with TiO2 nanoparticles in an air-jet simulated test chamber
Consumer nanoproducts are interested in public health aspects. In Korea, wallpaper is a popular construction material of housing. Wallpaper is well known to emit various volatile organic compounds and carbonyl compounds. Some wallpaper is coated [...]
The Study of Surface Accumulated Silica Nanoparticles from “Weathered” Polymer Nanocomposites Using ICP-OES
Rabb S.A., Stanley D., Sung L., Nguyen T., Yu L.L., National Institute of Standards and Technology, US
The impact of nanoparticles on the environment and, more importantly, the human population has been of great interest for the past few years. Release of these nanoparticles from different materials from wear or climate exposure [...]
Physico-chemical Characterization of Extracts of Silver Nanoparticle Containing Medical Devices
The main goal of this research was to gain a better understanding of the extraction profile of medical devices containing silver nanoparticles. Multiple silver nanoparticle containing medical devices were incubated in various extract solutions (water, [...]
Aerosolization of Carbon Nanotubes for the Development of Reference Air Samples
Reports on the inhalation risks associated with carbon nanotubes (CNTs) express concern for exposures throughout the lifetime of CNTs and CNT-enabled products. The ability to quantify airborne exposures to workers and consumers will be a [...]
Exposure Evaluation of Airborne Titanium Dioxide from Use in Spray Sunscreens
In this study, we simulated consumer application of a spray sunscreen containing nanoscale TiO2 to determine the nature of consumer TiO2 exposure from the product’s use (e.g. form of TiO2 [primary particle, aggregate/agglomerate], size of [...]
Effect of carbon nanotubes on plant growth and gas exchange using Arabidopsis thaliana
There has been increasing interest in the biological and biomedical applications of carbon nanotube. We addressed the novel question: Are pure CNTs produced for distribution to manufacturers “toxic” to plants through their effects on physiological [...]
Using single particle ICP-MS as a tool for understanding metallonanoparticles transformation during nanotoxicity assays
Johnson M.E., Hanna S.K., Petersen E.J., Nelson B.C., Yu L.L., National Institute of Standards and Technology, US
The work presented will establish a method for employing SP-ICP-MS toward the characterization of ENPs following their exposure to a model organism, C. elegans. Sample preparation, SP-ICP-MS analysis, data processing, particulate transport efficiency evaluation, and [...]
Effect of Temperature on Surface Degradation and Nanoparticle Release of Nano-SiO2 Epoxy Coatings under UV Radiation
To investigate the mechanisms of polymer degradation, polymer matrix, epoxy, with the addition of nanosilica (SiO2), was chosen. In this study an outdoor environment was simulated in the NIST (Nation Institute of Standards and Technology) [...]
Nanocellulose – Evaluation of the full spectrum of workplace health and safety
Cellulose nano-crystals and fibrils (CNC/CNF) are gaining prominence as nano structured material with production volumes forecasted to reach 780 tons per annum by 2017. Knowledge of the toxicologic properties, actual worker exposure and resulting risk [...]
Improving Adsorption Capacity of Ordered Mesoporous Carbon (OMC) Through Addition of Crosslink Agent
Well-ordered mesoporous carbon adding crosslink agent as precursor was synthesized using SBA-15 as a template, its structure was characterized by TEM, X-ray diffraction and FT-IR. Its adsorption capacity was evaluated by a typical total organic [...]
Outwitting the uncertainty of nanotechnology risks through environmental life cycle assessment
Steevens J., Chappell M., Janzen D., Edwards D., Shih W., US Army Engineer Research and Development Center, US
The goal of this study was to evaluate a carbon nanotube (CNT) product in terms of life cycle phases representing points where resources are expended and emissions are created. The study described here is important [...]
Prevention through Design Concepts for Sustainable Development of Nanomaterials
Nanotechnology has the potential to provide great benefit to society, but it must be developed responsibly. This responsibility involves addressing any adverse human and environmental impacts of the technology associated with engineered nanomaterials. Workers are [...]
Nanomaterial Characterisation Challenges
There has been a large amount of research and investment into the toxicological effects of nanomaterials on the environment and there is – as yet – no definitive findings on the relative weighting and importance [...]
Potential artifacts when evaluating the ecotoxicological effects of nanomaterials
Petersen E.J., Henry T.B., Zhao J., MacCuspie R.I., Kirschling T.L., Xing B., Dobrovolskaia M.A., Hackley V., White J.C., National Institute of Standards and Technology, US
Novel physicochemistries of engineered nanomaterials (ENMs) offer considerable commercial potential for new products and processes, but also the possibility of unforeseen and negative consequences upon ENM release into the environment. Investigations of ENM ecotoxicity have [...]
Development of In-Vivo Screening Benchmarks for Complex Engineered Nanomaterials
This works investigates embedding metal nanoparticles (NPs) in porous silica shells to reduce or entirely mitigate the metal NPs toxicity while still providing access to the metal NP surface; hence maintaining functionality of the embedded [...]
Nano-Safety Science for ensuring safety of nanomaterials ~Biological assessment of silica nanoparticles focused on neutrophil~
Higashisaka K., Kunieda A., Iwahara Y., Tanaka K., Tsunoda S., Yoshioka Y., Tsutsumi Y., Graduate School of Pharmaceutical Sciences, Osaka University, JP
Nanomaterials (NM) with particle sizes below 100 nm display unique properties compared to conventional materials with a submicron size. On the other hand, the debate on safety of NM has expanded worldwide. Therefore, to fully [...]
Cytotoxic Effects of Silver and Gold Nanoparticles in Human Glioblastoma U87 Cells
Nanoparticles have contributed significantly to the design of new drug delivery and targeting in cancer chemotherapy. Consequently, some of the desirable qualities of silver and gold nanoparticles have prompted their novel applications in cancer nanobiotechnology. [...]
Zinc Oxide Nanoparticles Induced Apoptosis and Necrosis in Human Neuroblastoma and Astrocytoma Cells
Lai J.C.K., Lai M.B., Balaraju A.K., Neti A., Lai J.C.K., Lai M.B., Tadinada S.M., Idikuda V.K., Singh M.R.M., Mukka K., Pfau J., Bhushan A., Leung S.W., Idaho State University College of Pharmacy, US
Because of their escalating uses in industrial and biomedical applications, humans are increasing exposed to nanoparticles in occupational and other environmental settings. However, the environmental safety and health impact of such particles have not been [...]
Nanogenotoxicity Measurements of Oxidative DNA Damage Using Isotope Dilution Mass Spectrometry
Petersen E., Jaruga P., Dizdaroglu M., Nelson B., National Institute of Standards and Technology, US
Hyphenated mass spectrometry (gas chromatography/mass spectrometry) techniques have been employed as one of the primary analytical tools for investigating the effects of ionizing radiation, chemical/biological carcinogens and oxygen derived free radicals on the induction and [...]
In Vitro Assessment of Nano-Cerium Oxide (nCeO2) and Nano-Ferric Oxide (nFe2O3) on Fibrogenic and Carcinogenic Potential
Wang L., Davidson D., Stueckle T., Derk R., Chen M., Sotiriou G.A., Demokritou P., Luanpitpong S., Ma J., Mercer R.R., Castranova V., Rojanasakul Y., National Institute for Occupational Safety and Health, US
Goal of the present study is to investigate the specific cellular responses to nCeO2 and nFe2O3 in various lung cell types and develop an in vitro chronic exposure model to predict the potential fibrogenic and [...]
In vitro Model for Identifying Subchronic Carbon Nanotube Exposure and Lung Cancer Gene Markers
Stueckle T., Davidson D., Derk R., Meighan T., Castranova V., Rojanasakul Y., Wang L., National Institute for Occupational Safety and Health, US
Concern for increased risk of carbon nanotube-associated lung disease, including carcinogenesis, has been raised due to asbestos-like characteristics. To date, no particle specific nanomaterial exposure or lung cancer markers have been identified. Here, we use [...]
Role of Caveolin-1 in Carbon Nanotube-Induced Stem-Like Cells and Tumorigenesis
Carbon nanotubes (CNT) hold great promise to create new and better products, but their long-term adverse health effects are a major concern. The objective of this study was to develop an in vitro model for [...]
Single-walled carbon nanotubes induce fibrogenic response by promoting fibroblast-to-myofibroblast transition: An in vitro molecular toxicity pathway based risk assessment
Several reports have shown that single-walled carbon nano tubes (SWCNT) caused lung fibrosis in rodents. The molecular mechanisms that govern SWCNT lung toxicity remain largely unaddressed. Our results indicate that SWCNTs induced ROS and mitochondrial [...]
Gaining critical mass: A dose metric conversion study using silver nanoparticles
Kennedy A.J., Hull M.S., Diamond S., Chappell M., Bednar A., Bednar A.J., Bednar A., Bednar A.J., Steevens J.A., US Army Engineer Research and Development Center, US
Mass is still the standard dose metric applied in the nano(eco)toxicology literature. Greater particle surface area or number may be more relevant dose metrics than mass to represent particle interactions with biological surfaces. This investigation [...]
Characterization of Screen-Penetrating Aerosol Fibers and Their Alignment in an Electric Field
Length classification of airborne fibers, including carbon nanotubes/nanofibers, is a fundamental technology important for toxicology studies of these materials. Fiber toxicity appears to depend on fiber concentration, dimensions (diameter and length) and durability in the [...]
Autonomous Nanosensor System for Monitoring and Quantifying Arsenic in Water
Salinas S., Mosquera N., Yate L., Coy E., Yamhure G., González E., Pontificia Universidad Javeriana, CO
In present work, we have developed a system for detection and quantification of arsenic in water, based on surface plasmon resonance. The sensor uses a gold self-assembled monolayers on Au(111) substrate. Studies that we have [...]
Journal: TechConnect Briefs
Volume: 3, Nanotechnology 2014: Electronics, Manufacturing, Environment, Energy & Water
Published: June 15, 2014
Industry sectors: Advanced Materials & Manufacturing | Energy & Sustainability
Topics: Advanced Manufacturing, Environmental Health & Safety of Nanomaterials
ISBN: 978-1-4822-5830-1