John J Bang

John J Bang
North Carolina Central University | NCCU · Department of Environmental, Earth and Geospatial Sciences

M.D., Ph.D.

About

46
Publications
4,915
Reads
How we measure 'reads'
A 'read' is counted each time someone views a publication summary (such as the title, abstract, and list of authors), clicks on a figure, or views or downloads the full-text. Learn more
1,202
Citations
Introduction
John Bang is a professor in the Depart. of Environmental, Earth and Geospatial Sciences. Current research topics include mechanistic study of neurological and pulmonary effects of engineered nanomaterials, understanding pathophysiological process in organs by nanomaterial including micro and nanoplastics, and development of early detection and diagnostic methods. For ROS assessment and mechanistic investigation, his group has used DMPO assay.
Additional affiliations
June 2015 - present
National Institute of Environmental Health Sciences
Position
  • Guest Researcher
June 2013 - present
North Carolina Central University
Position
  • Managing Director
July 2007 - present
North Carolina Central University
Position
  • Professor (Associate)

Publications

Publications (46)
Article
Full-text available
Background: The application of silver nanoparticles (AgNPs) is growing exponentially, and its potential damage to the cardiac remains to be elucidated. The purpose of this study was to investigate the ameliorative effect of sodium selenite on silver nanoparticles-induced myocardiocyte structural alterations in rats. Materials and methods: Forty...
Article
Traditional station-based PM2.5 monitoring method has significant spatial gaps. Moderate Resolution Imaging Spectrometer (MODIS) Aerosol Optical Depth (AOD) product (10 km spatial resolution) derived from the imagery of NASA Terra satellite has been used as a tool for regional PM2.5 studies for many years. Literature suggested mixed results on AOD-...
Article
Full-text available
Background: With the increased application of Silver nanoparticles (AgNP), its potential concerns to the health of human beings remain to be defined. This study aims to explore the harmful effects of AgNP on lung tissue in animals and to examine the mechanisms of protection achieved by sodium selenite. Methods: Sprague-Dawley(SD) rats were expos...
Article
Dental caries usually occurs at interproximal and occlusal surfaces. The purpose of the present study was to determine if characteristic spectral factors extracted from autofluorescence (AF) spectra are informative regarding caries detection and the determination of caries stage as compared with DIAGNOdent results. AF spectra were obtained from car...
Article
In this study, a geopolymer having a nano-scaled structure was fabricated using recycling fly ash slag discharged from IGCC (Integrated Gasification Combined Cycle), to assess the possibility of employing it to replace high strength concrete. Strength, density, crystal phase, and bonding structure, were measured and the nano-size crystal phase of t...
Article
Herein, we report the comparison of two different mixing methods for reductive dechlorination of gamma‐hexachlorocyclohexane (γ‐HCH), aldrin, and p, p’‐dichlorodiphenyl‐trichloroethane (p, p’‐DDT), using iron/palladium (Fe/Pd) bimetallic nanoparticles. A noticeable enhancement of the reaction rate was found when the reductive dechlorination reactio...
Article
Growth of informal electronic waste (e-waste) recycling sector is an emerging problem for India. The presence of halogenated compounds in e-wastes may result in the formation of persistent organic pollutants like polychlorinated biphenyls (PCBs), polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) during recycling processes. We therefore...
Article
Full-text available
Exposure to (bi)sulfite (HSO3-) and sulfite (SO32-) has been shown to induce a wide range of adverse reactions in sensitive individuals. Studies have shown that peroxidase-catalyzed oxidation of (bi)sulfite leads to formation of several reactive free radicals, such as sulfur trioxide anion (.SO3-), peroxymonosulfate (-O3SOO.), and especially the su...
Article
Full-text available
A Gram-stain-negative bacterial strain designated Con4T was isolated from activated sludge in a seawater treatment system. The strain was rod-shaped, motile, aerobic, and formed yellow-colored colonies on agar medium. Cells contained carotenoid pigments, but flexirubin-type pigments were absent. Based on 16S rRNA gene sequence analysis, the strain...
Article
Alzheimer’s disease (AD) is a debilitating progressive neurodegenerative disease that usually starts slowly and worsens over time. Though AD etiology is believed to be multifactorial, there is considerable evidence showing the role of copper exposure in beta-amyloid (βA) aggregation and AD pathogenesis. Owing to the fact that βA aggregation takes p...
Article
Full-text available
A novel Gram-stain-negative, coccus to oval shaped, non-motile bacterium designated as S5T, was isolated from lagoon sediments collected from North Carolina, United States of America. Strain S5T was able to grow at 12-45ºC (optima, 30-37 ºC) and at pH 6.3-9.0 (optima, 6.5-7.5). No added NaCl was required for growth of strain S5T. Strain S5T was pos...
Article
Full-text available
Strain S3T was isolated from the lagoon sediments, and appeared as transparent colonies on agar plates with cells staining Gram-negative. Catalase and oxidase were positive. Strain S3T hydrolyzed starch, casein and tween-20 while urea, chitin, gelatin and tween-80 was not. C18:1ω6c/C18:1ω7c, C16:16c/C16:17c, cyclo-C17:0 and C16:0 were predominant...
Article
Full-text available
Silver nanoparticles (AgNP), one of the most commonly used engineered nanomaterial for biomedical and industrial applications, has shown a toxic potential to our ecosystems and humans. In this study, murine hippocampal neuronal HT22 cells were used to delineate subcellular responses and mechanisms to AgNP by assessing the response levels of caspase...
Article
Full-text available
Dietary ingestion of persistent organic pollutants (POPs) correlates with developing obesity. Obesity alters metabolism, induces an inflammatory tissue microenvironment, and is also linked with diabetes and breast cancer risk/promotion of the disease. However, no direct evidence exists exploring the correlation among all three of these factors (POP...
Article
Full-text available
A Gram-stain-positive, non-motile, chemo-organotrophic, mesophilic, aerobic bacterium, designated A1 T, was isolated from sludge of a wastewater treatment plant. Strain A1 T showed good ability to degrade ammonia and grew well on media amended with methanol and ammonia. Strain A1 T grew with 0-11 % (w/v) NaCl, at 20-42 °C, but not <15 or >45 °C and...
Article
Full-text available
The 2,4,6-trinitrotoluene (TNT), 2,4-dinitrotoluene (2,4-DNT), and Toluene derived from a nitroaromatic compound(NAC) cause high toxicity and mutagenicity to environment. One of best methods to remove their toxicity from contaminated soil is known biological remediation with soil bacteria. Total of 235 strains of explosives-removing soil bacteria w...
Article
Full-text available
In recent years, the advent of nanomaterial use has increased exposure rates and raised health concerns. However, the toxicology profiles of many nanomaterials are far from complete for various reasons. In this study, Drosophila melanogaster, commonly called fruit flies, were exposed to one of the most widely used nanomaterials, silver nanopowder (...
Article
Local industries are often a driving force for the local economy. Due to the inter-dependency between the local economy and the industry, environmental issues perceived by the residents are sometimes overlooked. The community-based participant environmental justice study reported here presents how different groups of stakeholders worked together to...
Chapter
Despite rigorous efforts to understand and resolve environmental justice (EJ) issues, the complexity of the issues associated with many of these EJ communities continues to bring challenges to community residents and environmental researchers. Moncure, NC, located in northern Chatham County, is a rural community proximal to a cluster of several maj...
Chapter
Environmental Justice Communities are usually minority communities of low socio-economic status with a concern of increased risk from point source pollution not present in other communities. A priority of the U.S. EPA is to empower these communities to advocate for themselves. Toward that end, EPA has entered into a cooperative agreement with the D...
Article
Full-text available
A growing number of epidemiological studies conducted worldwide suggest an increase in the occurrence of adverse health effects in populations living, working, or going to school near major roadways. A study was designed to assess traffic emissions impacts on air quality and particle toxicity near a heavily traveled highway. In an attempt to descri...
Article
Full-text available
In this paper we report on the collection of fine (PM1) and ultrafine (PM0.1), or nanoparticulate, carbonaceous materials using thermophoretic precipitation onto silicon monoxide/formvar-coated 3 mm grids which were examined in the transmission electron microscope (TEM). We characterize and compare diesel particulate matter (DPM), tire particulate...
Article
A porous oxide semiconductor material made of a titanium-niobium oxide is evaluated as a heterogeneous photocatalyst for the photolysis of organic compounds in water. The photodegradation of micromolar solutions of a test compound, bromocresol green dye, was used to evaluate the material’s catalytic activity under ultraviolet light irradiation. The...
Article
Full-text available
Particulates extracted from a single section of a 10,000 year-old ice core melt sample exhibited characteristics of contemporary, airborne fine particulates: a majority were microcrystalline particulates and aggregated microcrystals, including some mixtures of microcrystals and carbonaceous matter. Particularly significant were the presence of carb...
Article
Carbon nanotubes and other aggregated fullerene-related multi-layer shell structures have been collected in propane and natural gas flame emissions from domestic cooking stoves and observed by transmission electron microscopy. Some aggregated nanoparticles collected on 3 mm electron microscope grids by thermal precipitation were mostly multi-walled...
Article
Full-text available
Aggregated multiwall carbon nanotubes (with diameters ranging from ∼3 to 30nm) and related carbon nanocrystal forms ranging in size from 0.4 to 2 μm (average diameter) have been collected in the combustion streams for methane/air, natural gas/air, and propane gas/air flames using a thermal precipitator. Individual particle aggregates were collected...
Article
Airborne aggregates of nanoparticulates were collected on carbon/form-coated, 100-mesh Ni TEM grids in a thermal precipitator and observed in an analytical TEM utilizing a BF-SAED-DF-EDS characterization protocol to identify the nanocrystalline or nanoparticulate components, especially their degree of crystallinity, size, structural/morphologic fea...
Article
This paper describes the use of a thermal precipitation device to collect representative, airborne nanoparticulates on transmission electron microscope (TEM) grid supports and their characterization using a bright field (BF)–dark field (DF)–selected area electron diffraction (SAED)–energy dispersive spectrometry (EDS) analysis protocol. Two airborn...
Article
Carbon nanotubes and other fullerene-related nanocrystals are ubiquitous in the atmospheric environment—both indoor and outdoor. In fact, these nanostructures have been observed even in a 10,000 year-old ice core sample, indicating their natural existence in antiquity, probably as natural gas/methane combustion products. Similar carbon nanotubes an...
Article
Full-text available
The production of carbon nanotubes and nanocrystal particulates by near optimal optimal combustion of methane in a laminar methane-air co-flow flame was discussed. The presence of carbon nanotubes and nanocrystals in atmospheric aerosols was analyzed using transmission electron microscopy (TEM). The non-optimized combustion of hydrocarbon fuel prod...
Article
Particulate matter (PM) from a number of specific sources has been collected on carbon/formvar-coated 100-mesh nickel or copper grids for transmission electron microscopy (TEM) using a thermal precipitator. These sources included diesel truck exhaust, graphitic PM from brake-shop environments, jet engine exhaust streams, and a wide range of general...
Article
Full-text available
Collection and Characteritzation of Ultra-Fine Airborne Particulates - Volume 9 Issue S02 - J. J. Bang, L. E. Murr, M. A. Chaney
Article
Full-text available
A thermophoretic precipitator (TP) that uses a novelty of direct sampling of ambient air particulate matter (PM) onto transmission electron microscopy (TEM) grids was designed and utilized to determine its potential applicability for the collection and consequent qualitative analyses of representative PM in the air, especially those with aerodynami...
Article
This paper describes the development and use of portable thermal precipitators for ultrafine and nanoparticle collection and illustrates their characterization by transmission-electron microscopy. Preliminary analyses found that the collected particulates are aggregates of a few or many hundreds of sub-particles (>10 nm), and more than three-fourth...
Article
Full-text available
In the context of environmentally conscientious nanoprocessing and manufacturing, an attempt is made to examine atmospheric nanoparticles from a materials science perspective, confirmed. The potential implications of future nanotechnologies are also discussed.
Article
Full-text available
Five sites in the twin cities of El Paso, Tex.-Ciudad Juárez, Chih., with different topographical, industrial, and traffic conditions were selected for a detailed analysis of particulate matter (PM) from 24- hour, Sierra Anderson dichotomous samplers. Filter samples were analyzed by scanning electron microscopy for their morphology and X-ray fluore...
Article
Full-text available
Although far from comprehensive with regard to temporal and spa- tial coverage, the first geographic information system (GIS)-refer- enced database on Paso del Norte air quality parameters and impacts is already facilitating development of a variety of advanced models, including diagnostic meteorological models and particulate matter (PM) source an...
Article
The Paso del Norte region is located midway along the U.S.- Mexican border where the Rio Grande/Río Bravo cuts through the Franklin Mountains to the north and the Sierra de Juárez to the south. The region encompasses the communities of Doña Ana County, N.M.; El Paso County, Tex.; and Municipio de Ciudad Juárez, Chih., which are separated by the riv...
Article
There has been mounting evidence over the past few years that ultrafine (<100 nm) and especially nanoparticulate (or nanoaerosols with mean diameter <50 nm) fractions of ambient air particulate matter (PM) in the atmosphere are far more toxic than larger counterparts. Studies have indicated that they pose considerable health risks including mortali...

Network

Cited By

Projects

Project (1)
Project
Delineation of adduct formation mechanism is investigated after exposure to various types of nanomaterial. The effect of POPs is also investigated.