Abstract:
:The in vivo micronucleus assay can be analyzed by comparing the number of micronuclei (MN) of several dose groups with those of a control group. In several publications, difficulties arose in estimating a suitable distribution for MN, even in the untreated historical control groups. Mitchell et al. described the presence of a subpopulation of more susceptible responders. Based on this assumption of such a subpopulation, score tests were used for the mixing distribution of responders and nonresponders (behavior same as in untreated control animals) within the dose groups. The power behavior of these tests was characterized with a simulation study. The advantage of score tests can be shown, even in the practical and important guideline case of only five animals per group.
journal_name
Environ Health Perspectjournal_title
Environmental health perspectivesauthors
Hothorn Ldoi
10.1289/ehp.94102s1121subject
Has Abstractpub_date
1994-01-01 00:00:00pages
121-5eissn
0091-6765issn
1552-9924journal_volume
102 Suppl 1pub_type
杂志文章abstract::Building-related illness ranges from mild rhinitis to potentially life-threatening hypersensitivity pneumonitis and legionellosis. Sick-building syndrome, consisting of headache, mucous membrane irritation, and fatigue, may be present in 30% of all office workers. Hypersensitivity pneumonitis, asthma, and legionellosi...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.919567
更新日期:1991-11-01 00:00:00
abstract::Individual variability in human arsenic metabolism has been reported frequently in the literature. This variability could be an underlying determinant of individual susceptibility to arsenic-induced disease in humans. Recent analysis revealing familial aggregation of arsenic metabolic profiles suggests that genetic fa...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.6420
更新日期:2003-08-01 00:00:00
abstract::In vivo detection of free radicals on a quantitative basis is essential for an establishment of their role in membrane, protein, and cell and tissue damage. This article compares optical methods, including chemiluminescence, electron paramagnetic resonance (EPR) and NMR methods for the study of free radicals and free ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.94102s1029
更新日期:1994-12-01 00:00:00
abstract:BACKGROUND:Millions of people worldwide consume arsenic-contaminated rice; however, little is known about the uptake and bioavailability of arsenic species after arsenic-contaminated rice ingestion. OBJECTIVES:In this study, we assessed arsenic speciation in greenhouse-grown and supermarket-bought rice, and determined...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.9322
更新日期:2006-12-01 00:00:00
abstract::In 1976, near Seveso, Italy, an industrial accident caused the release of large quantities of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) into the atmosphere, resulting in the highest levels of the toxicant ever recorded in humans. The contaminated area was divided into three zones (A, B, R) corresponding to decreasing...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.98106273
更新日期:1998-05-01 00:00:00
abstract:BACKGROUND:The 1974 Safe Drinking Water Act (SDWA) regulates >170,000 public water systems to protect health, but not >13 million private wells. State and local government requirements for private well water testing are rare and inconsistent; the responsibility to ensure water safety remains with individual households....
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP629
更新日期:2017-08-03 00:00:00
abstract::Implementation of the Toxic Substances Control Act of 1977 creates the need to reliably establish testing priorities because laboratory resources are limited and the number of industrial chemicals requiring evaluation is overwhelming. The use of quantitative structure activity relationship (QSAR) models as rapid and p...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.8771171
更新日期:1987-04-01 00:00:00
abstract:BACKGROUND:When conducting research with American Indian tribes, informed consent beyond conventional institutional review board (IRB) review is needed because of the potential for adverse consequences at a community or governmental level that are unrecognized by academic researchers. OBJECTIVES:In this article, we re...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1103904
更新日期:2012-01-01 00:00:00
abstract::Basophilic hepatic foci, nodules, and trabecular hepatocellular carcinomas, collectively referred to as focal hepatic lesions, were induced by single injections of 5.0 micrograms of diethylnitrosamine (DEN) per gram body weight in 15-day-old C57BL/6J X C3HeB/FeJ F1 (B6C3 F1) mice. Groups of eight experimental and eigh...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8350149
更新日期:1983-04-01 00:00:00
abstract::Groundwater pollution has become a worrisome phenomenon, mainly for aquifers underlying industrialized areas. In order to evaluate the risk of pollution, a model of the aquifer is needed. Herewith, we describe a quasi-tridimensional model, which we applied to a multilayered aquifer where a phreatic aquifer was coupled...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.898377
更新日期:1989-11-01 00:00:00
abstract:BACKGROUND:Traffic noise affects a large number of people, particularly in urbanized areas. Noise causes stress and annoyance, but less is known about the relationship between noise and depression. OBJECTIVE:We investigated the association of residential road traffic noise with depressive symptoms using 5-year follow-...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1409400
更新日期:2016-05-01 00:00:00
abstract:BACKGROUND:Modern toxicology is shifting from an observational to a mechanistic science. As part of this shift, high-throughput toxicity assays are being developed using alternative, nonmammalian species to prioritize chemicals and develop prediction models of human toxicity. METHODS:The nematode Caenorhabditis elegan...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1409645
更新日期:2016-05-01 00:00:00
abstract::Although broad links between climatic factors and coccidioidomycosis have been established, the identification of simple and robust relationships linking climatic controls to seasonal timing and outbreaks of the disease has remained elusive. Using an adaptive data-oriented method for estimating date of exposure, in th...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7786
更新日期:2005-06-01 00:00:00
abstract:BACKGROUND:Methylmercury (MeHg) is a known neuro-toxicant. Emerging evidence indicates it may have adverse effects on the neuro-logic and other body systems at common low levels of exposure. Impacts of MeHg exposure could vary by individual susceptibility or be confounded by beneficial nutrients in fish containing MeHg...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.1104494
更新日期:2012-06-01 00:00:00
abstract::A brief history of the development of the field of aquatic toxicology is provided. In order to provide a perspective on the state-of-the-art in aquatic toxicology relative to classical toxicology, the two fields are compared from the standpoint of the type of scientist practicing each field, the respective objectives ...
journal_title:Environmental health perspectives
pub_type: 历史文章,杂志文章
doi:10.1289/ehp.8034159
更新日期:1980-02-01 00:00:00
abstract::Asthma is the most common chronic illness of childhood and its prevalence is increasing, causing much concern for identification of risk factors such as air pollution. We previously conducted a study showing a relationship between asthma visits in all persons < 65 years of age to emergency departments (EDs) and air po...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.99107489
更新日期:1999-06-01 00:00:00
abstract::We investigated the metabolic fate of a low dose (25 micro g/kg) of bisphenol A [2,2-bis(4-hydroxy-phenyl)propane] (BPA) injected subcutaneously in CD1 pregnant mice using a tritium-labeled molecule. Analytic methods were developed to allow a radio-chromatographic profiling of BPA residues in excreta and tissues, as w...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.5603
更新日期:2003-03-01 00:00:00
abstract::Following our first report on elevated polybrominated diphenyl ether (PBDE) concentrations in California women, we expanded our investigation to include diverse groups of local women. We analyzed additional adipose and serum samples collected in the late 1990s from San Francisco Bay Area women participating in a breas...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.6220
更新日期:2003-07-01 00:00:00
abstract::Polychlorinated biphenyls (PCBs) and dioxins are known as neurotoxic compounds that may modulate sex steroid hormones. Steroid hormones play a mediating role in brain development and may influence behaviors that show sex differences, such as childhood play behavior. In this study we evaluated the effects of perinatal ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.021100593
更新日期:2002-10-01 00:00:00
abstract::Polychlorinated biphenyls (PCBs) are important environmental contaminants, and their toxicity to wildlife and humans are of major concern. PCBs form persistent and abundant metabolites, PCB methyl sulfones, that accumulate in biota. We now report that certain hydroxylated PCB metabolites show a strong and selective ac...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.94102464
更新日期:1994-05-01 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::Metals continually rank at the top of the U.S. Environmental Protection Agency's annual list of agents that pose the greatest hazard to the people of the United States. Metals aren't going away, either. They do not biodegrade, and they often concentrate in human and animal cells and tissue. Many metals are known human...
journal_title:Environmental health perspectives
pub_type: 新闻
doi:10.1289/ehp.99107a244
更新日期:1999-05-01 00:00:00
abstract::All cells contain elaborate systems for the spatial and temporal regulation of the calcium ion, [Ca2+]i, and diverse Ca2+ receptor and biochemical response systems that are regulated by these changes in [Ca2+]i. Toxicants that perturb the mobilization or homeostasis of [Ca2+]i will place the regulation of these proces...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.90847
更新日期:1990-03-01 00:00:00
abstract::Previously, we found that exposure of neonatal rats to chlorpyrifos (CPF) produced brain cell damage and loss, with resultant abnormalities of synaptic development. We used the same biomarkers to examine prenatal CPF treatment so as to define the critical period of vulnerability. One group of pregnant rats received CP...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.021101097
更新日期:2002-11-01 00:00:00
abstract:BACKGROUND:Organophosphorus pesticides (OPs) are developmental neurotoxicants but also produce lasting effects on metabolism. OBJECTIVES/METHODS:We administered diazinon (DZN) or parathion (PRT) to rats on postnatal days 14 at doses straddling the threshold for systemic signs of exposure and assessed the effects on he...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.0901237
更新日期:2010-02-01 00:00:00
abstract::N-Substituted aromatic compounds can be metabolized in most species to N-acetylated derivatives that are themselves subject to further enzymatic transformations, including hydrolysis and N,O-acyltransfer. These proceses can either potentiate or ameliorate the biological responses to these N-substituted derivatives. De...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.834943
更新日期:1983-03-01 00:00:00
abstract::Inorganic particulate matter in foods and drugs is discussed from the standpoint of determination by optical microscopy, source, and regulatory significance. Some particulate matter may be generated as extraneous material and traced to specific operational practices during processing and production with excessive leve...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.749183
更新日期:1974-12-01 00:00:00
abstract::Epidemiological studies report a small but positive association between short-term increases in airborne particulate matter and small increases in morbidity and mortality from respiratory and cardiovascular disease in urban areas. However, the lack of a mechanistic explanation to link particle exposure and human healt...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.98106127
更新日期:1998-03-01 00:00:00
abstract::The consideration of ethical issues relating to pediatric environmental health is a recent phenomenon. Discussions of biomedical ethics, research on children, and environmental health research have a longer history. In the late 1990s, researchers at the Kennedy Krieger Institute in Baltimore, Maryland, undertook a stu...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.9000
更新日期:2006-10-01 00:00:00
abstract::The 26th annual conference of the International Society for Environmental Epidemiology was held 24-28 August 2014 in Seattle, Washington. The conference theme was "From Local to Global: Advancing Science for Policy in Environmental Health." Sessions highlighted results assessing the burden of diseases from environment...
journal_title:Environmental health perspectives
pub_type:
doi:10.1289/ehp.isee2014
更新日期:2014-10-30 00:00:00