Abstract:
:Rats continuously exposed to NO2 at 0.04, 0.4, and 4.0 ppm for as long as 27 months were submitted to morphological observation and electronmicroscopic morphometry of the lung. At 4 ppm exposure for 9 months, bronchial epithelium showed typical proliferation, which progressed further at 18 months. At this stage, proliferation of type II alveolar epithelium and edematous extension of interstitial tissue were evident and yielded fibrosis at 27 months. At 0.4 ppm, morphological changes in 18-month specimens were still ambiguous, although a tendency toward epithelial changes, as well as interstitial edema of the alveolar wall, was noticed under the electron microscope. Slight but definite alteration of the epithelium became evident after 27 months. At 0.04 ppm there were no remarkable changes throughout the entire exposure period. The morphometry revealed concentration- and duration-dependent increases in arithmetic mean thickness (AMT) of the alveolar wall. At 4 ppm, increase of AMT started as early as 9 months, became significant at 18 months, and showed a slight decrease at 27 months. This decrease was interpreted as a recovery of alveolar epithelium and decreased amount of septal edema, which in turn led to fibrosis. At 0.4 ppm, a slight increase of AMT started at 18 months and extended significantly in 27 months. A similar but insignificant tendency was found even at 0.04 ppm. The morphological alterations were parallel to the concentration and duration of exposure. These findings suggested that an intensive study should be conducted to confirm whether alterations were due to prolonged exposure and/or due to elevated sensitivity of the aged lung.
journal_name
Environ Health Perspectjournal_title
Environmental health perspectivesauthors
Kubota K,Murakami M,Takenaka S,Kawai K,Kyono Hdoi
10.1289/ehp.8773157subject
Has Abstractpub_date
1987-08-01 00:00:00pages
157-69eissn
0091-6765issn
1552-9924journal_volume
73pub_type
杂志文章abstract:OBJECTIVE:We synthesized the main findings from an international epidemiologic study on the impact of biopersistent organic pollutants (POPs) on human reproductive function. DATA SOURCES AND EXTRACTION:We used a database with interview and biological data from 2,269 women and their spouses, and 18 published core paper...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.10700
更新日期:2008-03-01 00:00:00
abstract:BACKGROUND:Previous studies indicate that the design of streets and sidewalks can influence physical activity among residents. Park features also influence park use and park-based physical activity. Although individuals can walk on streets and sidewalks, walking loops in parks offer a setting to walk in nature and to a...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP293
更新日期:2017-02-01 00:00:00
abstract::The clinical use of polymeric materials in the body to repair and restore damaged or diseased tissues and organs is substantially increasing on an annual basis. Concomitant with this use is an increase in materials related research on medically used polymers. Information on the historical and current clinical use of p...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.751171
更新日期:1975-06-01 00:00:00
abstract:BACKGROUND:Chlorpyrifos is one of the most widely used organophosphate insecticides in the United States. Although the toxicity of chlorpyrifos has been extensively studied in animals, the epidemiologic data are limited. OBJECTIVE:To evaluate whether agricultural chlorpyrifos exposure was associated with mortality, we...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.9662
更新日期:2007-04-01 00:00:00
abstract::Health is defined as homeostasis of the cellular ecology, and a state where there has not been an inordinate loss, reversible or irreversible, of the structural and/or functional reserves of the body. An adverse health effect is defined as the causation, promotion, facilitation and/or exacerbation of a structural and/...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8352177
更新日期:1983-10-01 00:00:00
abstract::High cadmium exposure is known to cause bone damage, but the association between low-level cadmium exposure and osteoporosis remains to be clarified. Using a population-based women's health survey in southern Sweden [Women's Health in the Lund Area (WHILA) ] with no known historical cadmium contamination, we investiga...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8763
更新日期:2006-06-01 00:00:00
abstract::As part of a large pilot investigation of multimedia exposure to several classes of environmental contaminants, the National Human Exposure Assessment Survey (NHEXAS)-Maryland study, we collected 388 semiquantitative food checklists and duplicate diet solid food samples, analyzed for arsenic, cadmium, chromium, and le...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.01109121
更新日期:2001-02-01 00:00:00
abstract::The neurochemical basis of memory has been approached experimentally in four different ways: the bioassay; the interventive approach; the interventive-correlative approach; and the correlative approach. These approaches are fundamentally similar to those used for the study of the chemistry of any behavior. Each of the...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.7826143
更新日期:1978-10-01 00:00:00
abstract:BACKGROUND:Bisphenol A (BPA) is known to be biologically active in experimental models even at low levels of exposure. However, its impact on endometrial cancer remains unclear. OBJECTIVES:This study aimed to investigate whether lifelong exposure to different doses of BPA induced uterine abnormalities and molecular ch...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP6875
更新日期:2020-12-01 00:00:00
abstract::mental retardation: timing and thresholds; (italic)b(/italic)) endocrine dysfunction and developmental disabilities: dose and target implications; (italic)c(/italic)) attention-deficit disorder-ADHD and learning disabilities; and (italic)d(/italic)) new horizons: extending the boundaries. Support for the Rochester con...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.00108s3373
更新日期:2000-06-01 00:00:00
abstract:BACKGROUND:Exposure to certain phenols is ubiquitous because of their use in many consumer and personal care products. However, predictors of exposure have not been well characterized in most populations. OBJECTIVES:We sought to identify predictors of exposure and to assess the reproducibility of phenol concentrations...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1306830
更新日期:2014-07-01 00:00:00
abstract::Because of its unique geology, Minnesota can be divided into four agricultural regions: south-central region one (corn, soybeans); west-central region two (wheat, corn, soybeans); northwest region three (wheat, sugar beets, potatoes); and northeast region four (forested and urban in character). Cancer mortality (1980-...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.99107205
更新日期:1999-03-01 00:00:00
abstract::The association between ambient air pollution and adverse health effects, such as emergency room visits, hospitalizations, and mortality from respiratory and cardiovascular diseases, has been studied extensively in many countries, including Canada. Recently, studies conducted in China, the Czech Republic, and the Unit...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.6251
更新日期:2003-11-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.835141
更新日期:1983-09-01 00:00:00
abstract::During the last three decades, the use of modern organic synthetic pesticides has increased about 40-fold. Total U.S. production, for domestic and expert use, in 1976 was about 1.4 million pounds. Crops receiving the most intensive application of various pesticides were cotton for insecticides, corn for herbicides, an...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7827103
更新日期:1978-12-01 00:00:00
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journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.90-1519493
更新日期:1991-01-01 00:00:00
abstract::The rapid development of the chemical industry, combustion of fossil fuels, and smoking of tobacco have resulted in contact of the general population with benzo(a)pyrene and other carcinogenic aromatic hydrocarbons. Persons especially at risk occupationally are those engaged in thermal processing of oil shale, coal, a...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7930185
更新日期:1979-06-01 00:00:00
abstract:BACKGROUND:Although indoor residual spraying (IRS) with dichlorodiphenyltrichloroethane (DDT) and pyrethroids effectively controls malaria, it potentially increases human exposure to these insecticides. Previous studies suggest that prenatal exposure to these insecticides may impact human neurodevelopment. OBJECTIVES:...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP2129
更新日期:2018-04-06 00:00:00
abstract::Perchlorate (ClO4-) has been detected in groundwater sources in numerous communities in California and other parts of the United States, raising concerns about potential impacts on health. For California communities where ClO4- was tested in 1997 and 1998, we evaluated the prevalence of primary congenital hypothyroidi...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8176
更新日期:2006-05-01 00:00:00
abstract:BACKGROUND:Polychlorinated biphenyls (PCBs) in construction materials, such as caulking used around windows and expansion joints, may constitute a source of PCB contamination in the building interiors and in surrounding soil. Several studies of soil contamination have been conducted around buildings where the caulking ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.9646
更新日期:2007-02-01 00:00:00
abstract::Principles and practices of pediatric neurotoxicology are reviewed here with the purpose of guiding the design and execution of the planned National Children's Study. The developing human central nervous system is the target organ most vulnerable to environmental chemicals. An investigation of the effects of environme...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7672
更新日期:2005-10-01 00:00:00
abstract:BACKGROUND:After Hurricane Katrina, many New Orleans homes remained flooded for weeks, promoting heavy microbial growth. OBJECTIVES:A small demonstration project was conducted November 2005-January 2006 aiming to recommend safe remediation techniques and safe levels of worker protection, and to characterize airborne m...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.9258
更新日期:2006-12-01 00:00:00
abstract::Considerable attention has been given to the relationship between levels of fine particulate matter (particulate matter < or = 2.5 microm in aerodynamic diameter; PM(2.5) in the atmosphere and health effects in human populations. Since the U.S. Environmental Protection Agency began widespread monitoring of PM(2.5) lev...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.6980
更新日期:2004-09-01 00:00:00
abstract::The current Good Manufacturing Practice (cGMP) and effluent emission (use and disposal) regulations of the U.S. Food and Drug Administration (FDA) and manufacturing effluent discharge and emission regulations of the U.S. Environmental Protection Agency (U.S. EPA) require contained manufacture, use, and disposal of pha...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.02110213
更新日期:2002-03-01 00:00:00
abstract:BACKGROUND:Benzene is a common industrial chemical known to induce leukemia and other blood disorders, as well as aneuploidy, in both human blood cells and sperm at exposures > 10 ppm. Recent reports have identified health effects at exposure levels < 1 ppm, the permissible exposure limit (PEL; 8 hr) set by the U.S. Oc...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.0901531
更新日期:2010-06-01 00:00:00
abstract:BACKGROUND:Differences in the neighborhood food environment may contribute to disparities in obesity. OBJECTIVES:The purpose of this study was to examine the association of neighborhood food environments with body mass index (BMI) and obesity after control for neighborhood walkability. METHODS:This study employed a c...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.11590
更新日期:2009-03-01 00:00:00
abstract::As part of a cohort study of the effects of chronic exposure to lead on pregnancy outcome and child development, lead concentrations in the umbilical cord and placental tissues (body and membranes) from 9 late fetal deaths, 23 preterm births, and 18 births associated with premature rupture of the amniotic membranes we...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.90-1519491
更新日期:1991-01-01 00:00:00
abstract::Relative advantages and disadvantages and important design criteria for various exposure methods are presented. Five types of exposures are discussed: whole-body chambers, head-only exposures, nose or mouth-only methods, lung-only exposures, and partial-lung exposures. Design considerations covered include: air cleani...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.761617
更新日期:1976-08-01 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::The Centers for Disease Control and Prevention recommend that local public health agencies use local data to identify children at risk for lead exposure to ensure that they receive preventive services. The objective of this study was to demonstrate the usefulness of a geographic information system (GIS) in identifying...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.0110989
更新日期:2001-01-01 00:00:00