Abstract:
:In vivo bone lead measurement using K X-ray fluorescence (KXRF) has been used to estimate long-term lead exposure, especially in adults. Relatively few studies have been conducted on young subjects with this technique. To explore the measurement variability of KXRF bone lead measurements in young subjects, the tibiae of two male cadavers from Boston, Massachusetts, 17 and 20 years of age, were obtained for repeated bone lead measurements. Bone lead concentrations were measured using a grid of nine locations, 1 cm apart, centered at the midpoint of the tibia. Each location was sampled using five 60-min measurements. Measured concentrations ranged from < 0 to 11.8 microg Pb/g bone mineral across a tibia with mean concentrations for the midpoint locations of 0.8 microg Pb/g bone mineral SD = 2.5 and 2.0 microg Pb/g bone mineral (SD = 1.9) for the left and right legs of the younger subject and 3.6 microg Pb/g bone mineral (SD = 2.6) and 6.0 microg Pb/g bone mineral (SD = 3.3) for the left and right legs of the older subject. Although bone lead concentrations did not vary significantly by measurement location in an individual leg, reported measurement uncertainty increased significantly at locations that were 1 cm from the center of the tibia horizontally (p < 0.0001). Symmetry in bone lead concentration between legs was observed for the 17-year-old subject. Potential asymmetry between the left and right legs was suggested for the 20-year-old subject (p = 0.06). These data describe the degree of variability that may be associated with bone lead measurements of young subjects with low bone lead concentrations using a standard spot-source KXRF instrument. Because of the importance of conducting additional research on adolescent lead toxicity, further improvements to the precision of KXRF measurement are needed.
journal_name
Environ Health Perspectjournal_title
Environmental health perspectivesauthors
Hoppin JA,Aro A,Hu H,Ryan PBdoi
10.1289/ehp.00108239subject
Has Abstractpub_date
2000-03-01 00:00:00pages
239-42issue
3eissn
0091-6765issn
1552-9924pii
sc271_5_1835journal_volume
108pub_type
杂志文章abstract::The Lower North Shore region of the St. Lawrence River is home to a fish-eating population that displays an unusually high body burden of several organochlorines, including polychlorinated biphenyls (PCBs) and dioxin-like compounds (DLCs). We measured biomarkers indicative of liver enzyme induction and investigated th...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7970
更新日期:2005-10-01 00:00:00
abstract::comments on S. Patandin et al. : Dietary exposure to polychlorinated biphenyls and dioxins from infancy until adulthood: a comparison between breast-feeding, toddler, and long-term exposure. Environ Health Perspect 107:45-51 (1999). ...
journal_title:Environmental health perspectives
pub_type: 评论,信件
doi:10.1289/ehp.107-1566599
更新日期:1999-10-01 00:00:00
abstract::The effects of chrysotile on DNA synthesis in the gastrointestinal tract of the rat were studied by measuring the uptake of tritium-labeled thymidine; whole stomach, small intestine, colon liver were removed, cleaned, and homogenized and the DNA was isolated and assayed for tritium label.A dose-response study indicate...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.749319
更新日期:1974-12-01 00:00:00
abstract:BACKGROUND:The upward trend in industrial nations in the incidence of male genitourinary (GU) conditions may be attributed to increased exposure to endocrine disruptors. Polybrominated biphenyl (PBB), a brominated flame retardant, is one such suspected endocrine disruptor. OBJECTIVE:We investigated the relationship be...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.0800058
更新日期:2009-07-01 00:00:00
abstract::Predictions of carcinogenic activity are made for 30 chemicals currently being assessed for rodent carcinogenicity by the U.S. National Toxicology Program. The predictions are based upon the chemical structure, the anticipated or reported mutagenicity, and the reported sub-chronic toxicity of each chemical. It is pred...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.96104s51101
更新日期:1996-10-01 00:00:00
abstract:OBJECTIVES:There are some common occupational agents and exposure circumstances for which evidence of carcinogenicity is substantial but not yet conclusive for humans. Our objectives were to identify research gaps and needs for 20 agents prioritized for review based on evidence of widespread human exposures and potenti...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.0901828
更新日期:2010-10-01 00:00:00
abstract::Human biomonitoring investigations have provided data on a wide array of chemicals in blood and urine and in other tissues and fluids such as hair and human milk. These data have prompted questions such as a) What is the relationship between levels of environmental chemicals in humans and external exposures? b) What i...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8197
更新日期:2005-11-01 00:00:00
abstract::Nicotine and cigarette smoke extract show acute physiological effects: increasing tracheal pressure (PTR), pulmonary artery pressure (PPA), systemic blood pressure (PSYST), and left atrium pressure (PLA); and decreasing cardiac output (QAORTA) and blood flow to the left lower lobe (QLLL). In addition, cigarette smokin...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.8772283
更新日期:1987-06-01 00:00:00
abstract::Repeated inhalation of silica dust can lead to inflammation and fibrosis in human lung and in experimental animal models. The alveolar macrophage is believed to play a pivotal role in this process. Numerous macrophage-derived growth factors, cytokines, and arachidonic acid metabolites have been shown to contribute to ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.929777
更新日期:1992-07-01 00:00:00
abstract::Methylation is considered the detoxification pathway for inorganic arsenic (InAs), an established human carcinogen. Urinary speciation analysis is used to assess the distribution of metabolites [monomethylarsonate (MMA), dimethylarsinate (DMA), and unmethylated arsenic (InAs)], as indicators of methylation capacity. W...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.96104620
更新日期:1996-06-01 00:00:00
abstract::The general methods used to complete measurements of human exposures are identified and illustrations are provided for the cases of indirect and direct methods used for exposure analysis. The application of the techniques for external measurements of exposure, microenvironmental and personal monitors, are placed in th...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.95103s335
更新日期:1995-04-01 00:00:00
abstract::Southwest metropolitan Mexico City (SWMMC) inhabitants have been exposed several hours per day for the last 6 years to photochemical smog, ozone being the most important oxidant pollutant. Subjects exposed to the SWMMC atmosphere develop several histopathological changes in their nasal mucosa: dysplasia is the most si...
journal_title:Environmental health perspectives
pub_type: 临床试验,杂志文章,随机对照试验
doi:10.1289/ehp.101-1519752
更新日期:1993-06-01 00:00:00
abstract:BACKGROUND:The Love Canal is a rectangular 16-acre, 10-ft deep chemical waste landfill situated in a residential neighborhood in Niagara Falls, New York. This seriously contaminated site first came to public attention in 1978. No studies have examined mortality in the former residents of the Love Canal neighborhood (LC...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.11350
更新日期:2009-02-01 00:00:00
abstract:BACKGROUND:We have previously shown that adult male mice exposure to low doses of an ubiquitous endocrine disruptor, di(2-ethylhexyl) phthalate (DEHP), alters courtship behavior. OBJECTIVE:The effects of adult exposure to low doses of DEHP alone or in an environmental phthalate mixture on estrous cyclicity, reproducti...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP7662
更新日期:2021-01-01 00:00:00
abstract::This paper examines recent risk assessments for benzene and observes a number of inconsistencies within the study and consistencies between studies that should effect the quantitative determination of the risk from benzene exposure. Comparisons across studies show that only acute myeloid leukemia (AML) is found to be ...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.8982289
更新日期:1989-07-01 00:00:00
abstract::The phenylphosphonothioate insecticides EPN and leptophos, and several analogs, were evaluated with respect to their delayed neurotoxic effects in hens and their environmental behavior in a terrestrial-aquatic model ecosystem. Acute toxicity to insects was highly correlated with sigma sigma of the substituted phenyl g...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8036187
更新日期:1980-06-01 00:00:00
abstract:BACKGROUND:One of the most widely used classes of insecticides is the synthetic pyrethroids. Although pyrethroids are less acutely toxic to humans than to insects, in vitro studies have suggested that pyrethroids may be estrogenic. OBJECTIVES:We assessed pubertal effects by orally administering 0.5, 1.0, and 5.0 mg/kg...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.11119
更新日期:2008-09-01 00:00:00
abstract::32P-Postlabeling analysis and enzyme-linked immunosorbent assay (ELISA) have been used to detect DNA adducts in peripheral blood lymphocytes from primary aluminum production plant workers who were exposed occupationally to a mixture of polycyclic aromatic hydrocarbons (PAHs). Preliminary results reported here are from...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.9399307
更新日期:1993-03-01 00:00:00
abstract:OBJECTIVE:We reviewed epidemiologic evidence related to occupational pesticide exposures and cancer incidence in the Agricultural Health Study (AHS) cohort. DATA SOURCES:Studies were identified from the AHS publication list available at http://aghealth.nci.nih.gov as well as through a Medline/PubMed database search in...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.0901731
更新日期:2010-08-01 00:00:00
abstract:BACKGROUND:Population-based studies have estimated health risks of short-term exposure to fine particles using mass of PM(2.5) (particulate matter journal_title:Environmental health perspectives pub_type: 杂志文章 doi:10.1289/ehp.0800185 更新日期:2009-06-01 00:00:00
abstract:BACKGROUND:Epidemiologic studies of postnatal PCB exposure and behavior have not reported consistent evidence of adverse associations, possibly because of challenges in exposure estimation. We previously developed a pharmacokinetic model to improve estimation of children's PCB exposure. OBJECTIVES:We aimed to assess w...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1408084
更新日期:2015-09-01 00:00:00
abstract:BACKGROUND:Rodent models for urban air pollution show consistent induction of inflammatory responses in major brain regions. However, the initial impact of air pollution particulate material on olfactory gateways has not been reported. OBJECTIVE:We evaluated the olfactory neuroepithelium (OE) and brain regional respon...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP134
更新日期:2016-10-01 00:00:00
abstract:BACKGROUND:Mortality displacement (or "harvesting") has been identified as a key issue in the assessment of the temperature-mortality relationship. However, only a few studies have addressed the "harvesting" issue and findings have not been consistent. OBJECTIVES:We examined the potential impact of both short- and lon...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1307606
更新日期:2015-08-01 00:00:00
abstract::This report reviews the recent literature on the adverse effects of occupational factors on fertility and related reproductive outcomes. Few studies fulfill the criteria of good study design because of small sample size, insensitive measures of effect, selection, recall, and observation bias, weak if any control of co...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.93101s281
更新日期:1993-07-01 00:00:00
abstract:BACKGROUND:In the 1990s, the mercury-based preservative thimerosal was used in most pediatric vaccines. Although there are currently only two thimerosal-containing vaccines (TCVs) recommended for pediatric use, parental perceptions that vaccines pose safety concerns are affecting vaccination rates, particularly in ligh...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1408257
更新日期:2015-06-01 00:00:00
abstract::An intercomparison exercise was conducted for the quantification of arsenic species in spiked human urine. The primary objective of the exercise was to determine the variance among laboratories in the analysis of arsenic species such as inorganic As (As+3 and As+5), monomethylarsonic acid (MMA), and dimethylarsinic ac...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.97105650
更新日期:1997-06-01 00:00:00
abstract::Elucidation of the role of vinyl chloride metabolites in the various reaction sequences which comprise the metabolic pathway, including the interaction of reactive metabolities with some purine and pyrimidine residues of target-organ DNA, provides some explanation for the (oncogenic) properties associated with the ori...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.772155
更新日期:1977-12-01 00:00:00
abstract::We assessed the reproducibility of X-ray fluorescence-based lead measurements from multiple measurements made on a low-concentration plaster of paris phantom and in five subjects measured five times on two occasions. Over a 6-month period, 220 measurements of the same phantom were obtained and showed a standard deviat...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.94102690
更新日期:1994-08-01 00:00:00
abstract::We present evidence that the El Niño phenomenon intensifies the annual cycle of malaria cases for Plasmodium vivax and Plasmodium falciparum in endemic areas of Colombia as a consequence of concomitant anomalies in the normal annual cycle of temperature and precipitation. We used simultaneous analyses of both variable...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.01109489
更新日期:2001-05-01 00:00:00
abstract:BACKGROUND:In an effort to decrease the rates of smoking conventional tobacco cigarettes, electronic cigarettes (e-cigarettes) have been proposed as an effective smoking cessation tool. However, little is known about their toxicological impacts. This is concerning given that e-cigarette use is perceived as less harmful...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP6067
更新日期:2020-04-01 00:00:00