Abstract:
:The relationship between lead concentration in the dry film of lead based paints applied to steel bulkheads aboard ship, the lead concentration found in the air when the paint is removed by mechanical means, and blood lead concentrations of workers involved in lead based paint removal has not been well characterized. Intuitively a direct relationship must exist but confounding factors confuse the issue. Simultaneous sampling procedures from the same paint removal operation may differ by several orders of magnitude. The process from dried film to aerosol (airborne dust) exposure, and on to dose can be separated into two major phases; (1) generation of the dust and its transport through the air to the worker and (2) uptake and dose related factors within the body. Both phases involve complex interactions and there are a number of factors within each phase that significantly affect the potential lead dose for the worker. This study attempts to clarify the mechanisms involved in the generation and transportation of the dust to the worker by evaluating the relationship of a number of key factors on particle size and lead distribution within the aerosol dust generated when lead based paint is removed by sanding. The study examined the relationship between particle size in the dust and grit size of the abrasive. It also examined the distribution of lead within selected particle sizes. The Mass Median Aerodynamic Diameter (MMAD) was used as an indicator of change in the particle size distribution. Particle size distributions were evaluated using a TSI Aerodynamic Particle Sizer, a five stage cyclone and scanning electron microscopy. Lead distribution was determined using the five stage cyclone, and personal or area samples analyzed using inductively coupled plasma (ICP). Mass concentrations were evaluated using a MIE Mass Concentration Analyzer and gravimetric analysis of filter samples collected in the breathing zone. Student's t-tests were used to evaluate changes in MMADs, mass concentrations and other indices for inter and intra-grit size samples. Correlation coefficients (Pearson's r) were used to determine the relationship between factors. Findings of the research indicated that the particle size distribution in the dust is directly related to the grit size of the abrasive (i.e. inversely related to the abrasive grit number). Particulate mass concentrations of dust varied directly with abrasive grit number. The distribution of lead did not appear to be affected by grit size of the abrasive in that the lead distribution within the particle size ranges remained homogeneous and consistent with the lead concentration in the dried film. Mass concentrations of lead in air samples varied directly with lead concentration in the bulk coating. Results of this project, coordinated with deposition modeling and bioavailability studies will be useful in the development of a model to characterize lead dose to workers based on known parameters within the work specifications.
journal_name
Drug Chem Toxicoljournal_title
Drug and chemical toxicologyauthors
Alexander WK,Carpenter RL,Kimmel ECdoi
10.3109/01480549909029723subject
Has Abstractpub_date
1999-02-01 00:00:00pages
41-56issue
1eissn
0148-0545issn
1525-6014journal_volume
22pub_type
杂志文章abstract::Azaperone was evaluated for its mutagenic potential by the Salmonella/microsome test. No mutagenic activity towards six S. typhimurium strains could be evidenced with azaperone at doses up to 2,000 micrograms/plate, either without or with metabolic activation at usual test conditions. Higher concentrations of liver po...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480548709042990
更新日期:1987-01-01 00:00:00
abstract::Neurodegenerative diseases affect millions of people. Major reasons behind the onset and progression of these diseases are still under investigation. Therefore, any approach that would treat/prevent progression is important. In this study, we aimed to investigate the potential protective effects of Psephellus pyrrhobl...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480545.2019.1659808
更新日期:2019-09-02 00:00:00
abstract::Amiodarone is a high effectiveness anti-arrhythmia agent which is able to induce pulmonary fibrosis. Many studies have shown that the epithelial-mesenchymal transition (EMT) was a significant process in pulmonary fibrosis. So far, there are no studies about whether EMT was associated with amiodarone-induced pulmonary ...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480545.2018.1497055
更新日期:2020-07-01 00:00:00
abstract::This study was designed to investigate possible interference of Xenobiotics with SUMOylation in eukaryotic cells. To begin with, we docked 71 chemical structures from PubChem with human SUMO1 and UBC9 protein structures using Auto Dock 4.2 and Hex 6.3 and selected five compounds for binding studies in Surface Plasmon ...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480545.2018.1526179
更新日期:2020-11-01 00:00:00
abstract::The fluoride reactivation process was evaluated for measuring the level of sarin or soman nerve agents reactivated from substrates in plasma and tissue from in vivo exposed guinea pigs (Cava porcellus), in blood from in vivo exposed rhesus monkeys (Macaca mulatta), and in spiked human plasma and purified human albumin...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1081/dct-120027901
更新日期:2004-02-01 00:00:00
abstract::S-[3-carbamoylsulfanyl-2-(dimethylamino)propyl] carbamothioate (Cartap) (CAS number: 15263-52-2) is a synthetic insecticide of thiocarbamates group that is extensively used in field of agriculture for controlling of several pests like rice stem borer, leaf folder pests in paddy field and diamond back moth, aphids in c...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480545.2018.1551900
更新日期:2021-03-01 00:00:00
abstract::A Type II pyrethroid pesticide β-cypermethrin is widely used in agriculture and domestic applications for pest control. However, the effect of β-cypermethrin on the glutamate neurotransmitter has not been well-documented. In the current study, mice were treated with 20, 40, or 80 mg/kg β-cypermethrin by a single oral ...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480545.2014.900072
更新日期:2015-01-01 00:00:00
abstract::A large number of cationic amphiphilic drugs (CADs) are known to cause phospholipidosis (PLD) in vivo. In the present study, we have built upon our previous findings to further qualify the use of a fluorescently labeled phospholipid-based cell-culture assay to detect PLD-inducing drugs. In this paper, we demonstrate t...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480540802391229
更新日期:2008-01-01 00:00:00
abstract::The frequency of dexamethasone-induced cleft palate in mouse fetuses was studied at four fixed times on day 13 of gestation. On day 18, the fetuses were examined for malformations and corticosterone concentration was additionally measured. Evidence of a diurnal rhythm in cleft palate frequency, as well as in corticost...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480548609042827
更新日期:1986-01-01 00:00:00
abstract::The availability of tissue glutathione (GSH) appears to depend upon a balance between tissue concentrations, the rate of reactive metabolite formation and the re-synthesis of GSH. To test this hypothesis, diethyl maleate (DEM, 5.8 mmol/kg bw) was administered intraperitoneally to male and female mice, hamsters, rats a...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480548408998263
更新日期:1984-01-01 00:00:00
abstract::The object of this study was to evaluate the toxicity of norbornene fluoroalcohol (NBFOH), which is used as an intermediate in the production of fluorinated monomers and polymers. NBFOH was evaluated for acute oral, dermal, and inhalation toxicity, dermal sensitization using the Local Lymph Node Assay (LLNA), mutagene...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480540500262680
更新日期:2005-01-01 00:00:00
abstract::Nephrotoxicity is a major limitation of adriamycin (ADR) chemotherapy. We hypothesized that administration of standardized aqueous bark extract of Gmelina arborea Roxb. (GA) (Family; Verbenaceae), a traditional therapeutic agent, may reduce the nephrotoxicity caused by ADR in Wistar rats. The dose-dependent nephroprot...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480545.2020.1811721
更新日期:2020-08-30 00:00:00
abstract::Eight antineoplastic drugs were evaluated for their ability to induce mutation in the Ames Salmonella/microsome and the TK+/- mouse lymphoma assay. Dose response data were utilized to determine the relative potency of each of these drugs. They were then ranked based on this information. Vincristine, the most potent co...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480547809105021
更新日期:1978-01-01 00:00:00
abstract::Hexachloroethane (HCE) was fed to Fischer 344 rats at approximate doses of 0, 1, 15 or 62 mg/kg/day for 16 weeks. Selected tissues were assayed at termination for HCE content. Histopathological examination identified the kidney as the primary target organ with male rats more sensitive than female rats. The kidney conc...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480548508999167
更新日期:1985-01-01 00:00:00
abstract::Cis-1,2-dichloroethylene was administered daily by corn oil gavage to male and female Sprague-Dawley rats at the following dose levels: 1.0, 3.0, 10.0 and 22.0 mmol/kg/day for 14 days. Doses gavaged during the 90-day subchronic study were 0.33, 1.00, 3.00 and 9.00 mmol/kg/day. There were no compound-related deaths or ...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480549509014319
更新日期:1995-05-01 00:00:00
abstract::2,3,7,8-Tetrachlorodibenzo-p-dioxin (TCDD) is a persistent environmental toxin formed as an unintentional by-product of incomplete combustion. Several therapeutic approaches have evolved to combat its toxicity since it elicits immunotoxicity, neurotoxicity, hepatotoxicity, carcinogenicity and lethality. Search for dru...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480545.2014.919582
更新日期:2015-04-01 00:00:00
abstract::The objective of the present study was to evaluate the oxidative stress potential of low-level organophosphate fenthion exposure with the modulatory effect of buthionine sulfoximine in the liver of Cyprinus carpio L. The fish were exposed to 20% of 96-hour LC(50) of fenthion for 24 and 96 hours. Total and oxidized glu...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480540802171233
更新日期:2008-01-01 00:00:00
abstract::Dicyclohexylcarbodiimide (DCC) and diisopropylcarbodiimide (DIC) are two commonly used coupling reagents in protein synthesis resulting in exposure of individuals in chemical and pharmaceutical industries as well as research laboratories involved in protein synthesis and recombinant DNA techniques. The objectives of t...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480549809011647
更新日期:1998-05-01 00:00:00
abstract::Butea monosperma (Lam.) Taub. is an ethnomedicinal tree of remedial value in the treatment of diabetes, bone fractures, and liver and neurological disorders. However, the information available on DNA-protective and anti-proliferative potential of bark of this tree is scarce. In the present study, the extract/fractions...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480545.2018.1497051
更新日期:2020-07-01 00:00:00
abstract::2-Amino-3,5-dicyano-4-o-chlorophenyl-6-ethoxypyridine (ACCPE) is a water soluble compound formed during the alkaline treatment of the alcoholic liquor in the production of 2-chlorobenzylidene malononitrile (CS). The acute toxicity and primary irritancy of ACCPE and CS were investigated and compared. Both perorally and...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480548508999168
更新日期:1985-01-01 00:00:00
abstract::Nonsteroidal anti-inflammatory drugs (NSAIDs) such as aspirin, celecoxib, and etoricoxib are reported to act as chemopreventive agents in experimental colon cancer induced by 1,2-dimethylhydrazine (DMH) as they are known cyclooxygenase (COX) enzyme inhibitors. To determine whether NSAIDs can also effectively modulate ...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480540701522106
更新日期:2007-01-01 00:00:00
abstract::Currently, no standardized and well-validated alternative models exist for screening for progesterone-responsive endocrine disrupting chemicals (EDCs). Because of this, a rapid assay for evaluating progestin/antiprogestin activity using Xenopus oocyte germinal vesicle breakdown (GVBD) as a model was evaluated. Five co...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1081/dct-120005892
更新日期:2002-08-01 00:00:00
abstract::As part of an occupational hazard evaluation, p-bromobenzyl bromide (p-BBB) was evaluated for genotoxic activity in the Ames microbial mutagenicity assay, the alkaline elution assay for DNA strand breaks in rat hepatocytes and the in vitro chromosome aberration assay in Chinese hamster ovary cells. The compound produc...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480549908993169
更新日期:1999-11-01 00:00:00
abstract::This study was conducted to evaluate the potential reproductive toxicity of epichlorohydrin in a one-generation reproduction toxicity study in compliance with OECD Test Guideline 415. Twenty-four male and female rats per group were given epichlorohydrin by gavage at 0, 3.3, 10, and 30 mg/kg/day. Males were dosed for 1...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480541003734030
更新日期:2010-07-01 00:00:00
abstract::The present study was aimed to report the toxicity of the chlorpyrifos, an organophosphorus insecticide, with regard to histological and cytological effects through light and transmission electron microscopes in the gills of freshwater fish, Anabas testudineus. The fish were exposed to 0.125 (5% of 96 h LC50), 0.250 (...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480545.2018.1497052
更新日期:2020-07-01 00:00:00
abstract::Various antioxidants play an important role in reducing the reactive oxygen species (ROS) by scavenging them directly or indirectly. Mercury (Hg) is one of the known hazardous genotoxicant, induces the genotoxicity by enhancing the ROS. In the present study, three structurally different bioactive compounds such as mel...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480545.2014.975354
更新日期:2015-10-01 00:00:00
abstract::Chrysin (CH) is a natural flavone which possesses antioxidant, anti-cancer, and anti-inflammatory properties. The aim of the present study was to investigate the effects of CH on biochemical parameters, histopathological changes, and genotoxicity and hematological indices in diazinon (DZN)-induced toxicity in BALB/c m...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480545.2017.1384834
更新日期:2018-07-01 00:00:00
abstract::The antigenotoxic activity of glucosamine (GlcN) and N-acetylglucosamine (GlcNAc) in human peripheral lymphocytes exposed to oxidative stress was investigated. Human lymphocytes were treated with different concentrations of these aminosugars (0, 2.5, 5, 10, 20 and 40 mM) and 25 µM H2O2 simultaneously and evaluated by ...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480545.2013.878951
更新日期:2014-10-01 00:00:00
abstract::The tricyclic antidepressant imipramine was instilled directly onto the lung surface of experimental rats in specific low doses (0.025 - 0.60 mg/kg body weight) and the animals were sacrificed at time intervals from 2 - 21 days after a single instillation. Such treatment caused changes almost exclusively confined to t...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.3109/01480548309016020
更新日期:1983-01-01 00:00:00
abstract::The intoxication of insecticides such as bifenthrin and diazinon has been reported to generate free radicals, and thereby alter the antioxidant defense system in erythrocytes. The present study is aimed to investigate the protective effects of acetone (DA) and methanolic (DM) extracts of lichen Dirinaria consimilis ag...
journal_title:Drug and chemical toxicology
pub_type: 杂志文章
doi:10.1080/01480545.2020.1762632
更新日期:2020-05-12 00:00:00