Abstract:
:Present available information regarding ovarian tumors in hens is incomplete in most aspects, and this lack of knowledge hampers use of hens as models for study of ovarian cancer. A study of 466 hens ranging from 2 to 7 years of age and covering a period of more than 3 years has provided much needed information relative to reproductive tract neoplasia. On the basis of this study, it is apparent that hens have a high rate of ovarian tumors, but that such tumors are uncommon in hens less than 2 years of age. Adenocarcinomas with a high degree of morphologic variability are the most common ovarian tumors in hens. Hormonal imbalance does not appear to be a factor in the development of these adenocarcinomas. Steroidogenic and morphologically distinctive granulosa cell tumors originating from follicles in atrophic ovaries represent another common ovarian tumor type. Unique to the hen are oviductal adenocarcinomas. These tumors arise from the albumin-secreting glands of the oviduct, occur with relatively high frequency, and must be differentiated from ovarian adenocarcinomas.
journal_name
Environ Health Perspectjournal_title
Environmental health perspectivesauthors
Fredrickson TNdoi
10.1289/ehp.877335subject
Has Abstractpub_date
1987-08-01 00:00:00pages
35-51eissn
0091-6765issn
1552-9924journal_volume
73pub_type
杂志文章abstract:BACKGROUND:Global climate change is anticipated to reduce future cereal yields and threaten food security, thus potentially increasing the risk of undernutrition. The causation of undernutrition is complex, and there is a need to develop models that better quantify the potential impacts of climate change on population ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1003311
更新日期:2011-12-01 00:00:00
abstract::This review presents a brief overview of the health effects and exposures of two criteria pollutants--ozone and particulate matter--and two toxic air pollutants--benzene and formaldehyde. These pollutants were selected from the six criteria pollutants and from the 189 toxic air pollutants on the basis of their prevale...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.00108s4625
更新日期:2000-08-01 00:00:00
abstract::New technologies and methods for assessing human exposure to chemicals, dietary and lifestyle factors, infectious agents, and other stressors provide an opportunity to extend the range of human health investigations and advance our understanding of the relationship between environmental exposure and disease. An ad hoc...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.7651
更新日期:2005-07-01 00:00:00
abstract:BACKGROUND:Findings from national surveys suggest that everyone in the United States is exposed to perchlorate. At high doses, perchlorate, thiocyanate, and nitrate inhibit iodide uptake into the thyroid and decrease thyroid hormone production. Small changes in thyroid hormones during pregnancy, including changes withi...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.1409614
更新日期:2016-06-01 00:00:00
abstract::Exposure to low levels of chemicals indoors is often to a mixture of volatile organic compounds (VOCs). It is of interest to determine if the symptomatic and sensory responses can be attributed to a single chemical or to a mixture of chemicals. To determine if sensory or symptomatic responses differ with exposure to s...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.98106739
更新日期:1998-11-01 00:00:00
abstract::A simplified mathematical model which made use of Fick's laws of diffusion written in spherical coordinates was developed to describe the rate of diffusion of residual monomers from polymer resins. The properties of the monomer-polymer system which influenced the amount of monomer remaining in the polymer as a functio...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7617227
更新日期:1976-10-01 00:00:00
abstract::Organochlorines are persistent lipophilic compounds that accumulate in Inuit people living in circumpolar countries. Organochlorines accumulate as a result of the Inuits' large consumption of sea mammal fat; however, available data are limited to blood lipids, milk fat, and adipose tissue. We report results of organoc...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.99107823
更新日期:1999-10-01 00:00:00
abstract::Studies on the fate of 14C-labeled vinyl chloride (VC) following oral administration and inhalation exposure in rats demonstrated that the disposition of VC in the body is a function of the dose. More importantly, from the data available, it appears that a correlation exists between doses of VC which cause tumors and ...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7617145
更新日期:1976-10-01 00:00:00
abstract::Concentrations of polychlorinated biphenyls (PCBs), hydroxylated metabolites of PCBs (HO-PCBs) and octachlorostyrene (4-HO-HpCS), and pentachlorophenol (PCP) were determined in umbilical cord plasma samples from three different regions of Québec. The regions studied included two coastal areas where exposure to PCBs is...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.02110411
更新日期:2002-04-01 00:00:00
abstract::Most of the composites and sealants used in dentistry are based on bisphenol A diglycidylether methacrylate (Bis-GMA). Reports revealed that in situ polymerization is not complete and that free monomers can be detected by different analytic methods. Concerns about the estrogenicity of bisphenol A (BPA) and other aroma...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.0010821
更新日期:2000-01-01 00:00:00
abstract::In this study, we determined the biologic activity of dichloromethane-extracted particulate matter < 10 micro m in aerodynamic diameter (PM10) obtained from filters at three sites in the Paso del Norte airshed, which includes El Paso, Texas, USA; Juarez, Chihuahua, Mexico, and Sunland Park, New Mexico, USA. The extrac...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.6058
更新日期:2003-08-01 00:00:00
abstract::Proto-oncogenes are cellular genes that are expressed during normal growth and developmental processes. Altered versions of normal proto-oncogenes have been implicated in the development of human neoplasia. In this report, we show the detection of activated proto-oncogenes in various spontaneous and chemically induced...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.877581
更新日期:1987-11-01 00:00:00
abstract::This paper summarizes two roundtable discussions held at the conclusion of the International Conference on Biopersistence of Respirable Synthetic Fibres and Minerals. The first round table addressed the role of biopersistence in the pathogenicity of fiber-induced disease. The panel included T. W. Hesterberg (Chairman)...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.94102s5277
更新日期:1994-10-01 00:00:00
abstract::There is widespread concern regarding the safety of silver-mercury amalgam dental restorations, yet little evidence to support their harm or safety. We examined whether mercury dental amalgams are adversely associated with cognitive functioning in a cross-sectional sample of healthy working adults. We studied 550 adul...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.5879
更新日期:2003-05-01 00:00:00
abstract::Adults eating a Western diet digest and absorb ingested food containing approximately 100 g fat, 350 g carbohydrate, and 75 g protein daily. Normal fat absorption requires adequate gastric, pancreatic, liver-biliary, mucosal, and lymphatic function. Carbohydrate and protein absorption is much less dependent on liver-b...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.7933101
更新日期:1979-12-01 00:00:00
abstract::As a result of the Leadership Conference on Biomedical Research and the Environment, the Facilities Committee focused its work on the development of best environmental practices at biomedical research facilities at the university and independent research facility level as well as consideration of potential involvement...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.00108s6945
更新日期:2000-12-01 00:00:00
abstract::In most neurotoxicological studies morphological assessment focuses on pathological effects, like degenerative changes in neuronal perikarya, axonopathy, demyelination, and glial and endothelial cell reactions. Similarly, the assessment of physiological and behavioral effects center on evident neurological symptoms, l...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.8774153
更新日期:1987-10-01 00:00:00
abstract::Restriction-fragment-length polymorphism analysis was performed on several different types of human cancers, including carcinoma of the uterine cervix, neuroblastoma, hepatocellular carcinoma, pheochromocytoma, stomach cancer, and small-cell lung carcinoma (SCLC), to determine the chromosomal loci of putative tumor-su...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.9193121
更新日期:1991-06-01 00:00:00
abstract::A series of experiments is described in which operant methodology is used to study the effects of drugs on "learning." Emphasis is placed on the technique of repeated acquisition as a behavioral baseline for studying this type of transition state. In this technique, each subject is required to learn a new discriminati...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.782677
更新日期:1978-10-01 00:00:00
abstract::This cross-sectional study examined the association between environmental lead measurements surrounding a Los Angeles County battery recycling facility and the blood lead levels of the children living nearby. Environmental lead measurements and blood lead levels of young children living in a community adjacent to a st...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.96104314
更新日期:1996-03-01 00:00:00
abstract::In an earlier study we established that timely and adequate tissue repair response following the administration of a six-fold dose-range of thioacetamide (TA; 50, 150, and 300 mg/kg) prevented progression of injury and led to recovery and animal survival. Delayed and attenuated repair response after the 600 mg/kg TA d...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.96104744
更新日期:1996-07-01 00:00:00
abstract:BACKGROUND:The Consortium Linking Academic and Regulatory Insights on Bisphenol-A (CLARITY-BPA) is a rare collaboration of guideline-compliant (core) studies and academic hypothesis-based studies to assess the effects of bisphenol A (BPA). OBJECTIVES:We aimed to a) determine whether BPA showed effects on the developin...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/EHP6301
更新日期:2020-05-01 00:00:00
abstract:BACKGROUND:Widespread residential pesticide use throughout the United States has resulted in ubiquitous, low-level pesticide exposure. The mix of active pesticide ingredients is changing in response to 2000-2001 regulations restricting use of the organophosphorus insecticides chlorpyrifos and diazinon. OBJECTIVES:We a...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.11367
更新日期:2008-12-01 00:00:00
abstract::Erythropoietic cells in bone marrow are vulnerable to cytotoxic substances. There are three types of erythroid precursors: cells that can take up Fe but do not proliferate (reticulocytes), those that can take up Fe and proliferate (normoblasts and pronormoblasts), and those cells that do not take up Fe but can prolife...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.813929
更新日期:1981-06-01 00:00:00
abstract::This paper reports the results of a comprehensive survey of the effects of the accidental release of radiation caused by the accident at the Chernobyl nuclear power station in April 1986. The accident and the resulting release of radiation and radioactive products into the atmosphere produced the most serious environm...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.93101s2117
更新日期:1993-07-01 00:00:00
abstract::Biological monitoring of genotoxic hazard in the rubber industry was performed in 19 male workers and 20 age-matched controls in a local health unit in northern Italy. Peripheral blood lymphocytes were analyzed for the presence of DNA damage (single-cell microgel-electrophoresis, or comet assay) and for cytogenetic pa...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.96104s3543
更新日期:1996-05-01 00:00:00
abstract::Although chemical exposure has been associated with reduced reproduction in certain North American fish, reptiles, and mammals, definitive cause-and-effect data are lacking in many instances. Because the increasing use and global transport of industrial chemicals pose significant risk to successful reproduction, metho...
journal_title:Environmental health perspectives
pub_type: 杂志文章,评审
doi:10.1289/ehp.95103s487
更新日期:1995-05-01 00:00:00
abstract::Methylcobalamin (methyl-B12) has been implicated in the biomethylation of the heavy metals (mercury, tin, platinum, gold, and thallium) as well as the metalloids (arsenic, selenium, tellurium and sulfur). In addition, methylcobalamin has been shown to react with lead, but the lead-alkyl product is unstable in water. D...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.771943
更新日期:1977-08-01 00:00:00
abstract::The fundamental problems in population monitoring for genetic effects are twofold: the binomialized nature of the data and the lower power due to small risk of finding positive results. The binomial character is artificial, even forced, and can with advantage be replaced by more refined analysis, and by a focus on all...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.8142127
更新日期:1981-12-01 00:00:00
abstract::The phenomenon of fiber-induced cytotoxicity to P388D1 macrophagelike cells has been demonstrated to parallel (thus far without exception) the probability that the fiber will induce a pleural sarcoma (mesothelioma) in rats. This startling parallel in both cases seems to be essentially independent of the chemical natur...
journal_title:Environmental health perspectives
pub_type: 杂志文章
doi:10.1289/ehp.803491
更新日期:1980-02-01 00:00:00