abstract：:Human milk is a repository for certain classes of long-lived, fat-soluble environmental contaminant chemicals. Some members of this class, such as the chlorinated pesticides and the chlorinated biphenyls, can be expected to be present at chemical waste disposal sites. Analysis of samples of breast milk obtained from w...

journal_title：Environmental health perspectives

authors： Rogan W,Gladen B

更新日期：1983-02-01 00:00:00

abstract：:In the fall of 1976 Congress enacted the Resource Conservation and Recovery Act, commonly referred to as RCRA. The objective of the statute is to create an orderly system for the generation, handling and disposal of hazardous waste by means of a comprehensive tracking and record keeping mechanism. RCRA does not regula...

journal_title：Environmental health perspectives

authors： Friedman M

更新日期：1983-02-01 00:00:00

abstract：:Most air pollution in West Germany is caused by combustion products. Particulate organic matter released by incomplete combustion is suspected to contribute to the "urban factor" of lung cancer frequency in urban-industrial centers. The carcinogenic potential of single components, groups of compounds and total source ...

journal_title：Environmental health perspectives

authors： Pott F,Stöber W

更新日期：1983-01-01 00:00:00

abstract：:The epidemiological data linking air pollution and lung cancer are derived from statistical associations concerning rates of cancer among urban and rural residents, migrant studies and studies of occupational groups exposed to effluents from fossil fuel combinations. Few, if any of these studies, are adequately adjust...

journal_title：Environmental health perspectives

authors： Speizer FE

更新日期：1983-01-01 00:00:00

abstract：:A case control study of drinking water treatment practices and female cancer mortality was conducted in Wisconsin. Cancer deaths for 1972-1977 from 28 Wisconsin counties and noncancer deaths matched to cancer deaths on age, year of death and county of residence, were compared for characteristics of drinking water supp...

journal_title：Environmental health perspectives

authors： Kanarek MS,Young TB

更新日期：1982-12-01 00:00:00

abstract：:Inspection of the available literature reveals that a detailed investigation of the aqueous organic chemistry of chlorine dioxide and systematic identification of products formed during water disinfection has not been considered. This must be done before an informed assessment can be made of the relative safety of usi...

journal_title：Environmental health perspectives

authors： Stevens AA

更新日期：1982-12-01 00:00:00

abstract：:Over the past decade much information has been published on the analysis of organics extracted from treated water. Certain of these organics have been shown to be by-products of the chlorination disinfection process and to possess harmful effects at high concentrations. This has resulted in increased interest in alter...

journal_title：Environmental health perspectives

authors： Watts CD,Crathorne B,Fielding M,Killops SD

更新日期：1982-12-01 00:00:00

abstract：:A major concern of the chlorination of aquatic humic materials is the ubiquitous production of trihalomethanes. A large number of other chlorinated organic compounds, however, have been shown to be formed by chlorine's reaction with humic substances. In this study, humic material was concentrated from a coastal North ...

journal_title：Environmental health perspectives

authors： Johnson JD,Christman RF,Norwood DL,Millington DS

更新日期：1982-12-01 00:00:00

abstract：:The mutagenic activities of several phthalate esters have been evaluated in an 8-azaguanine resistance assay in Salmonella typhimurium. Three phthalate esters were found to be mutagenic: dimethyl phthalate, diethyl phthalate and di-n-butyl phthalate. A number of other phthalate esters were not found to be mutagenic, i...

journal_title：Environmental health perspectives

authors： Seed JL

更新日期：1982-11-01 00:00:00

abstract：:The phthalate acid esters (PAEs), and, in particular, di(2-ethylhexyl) phthalate (DEHP) and its monoester, monoethylhexyl phthalate (MEHP), can adversely affect rodent testes but only at high doses. Rat gonadal zinc levels can be decreased by the injection of DEHP, but not MEHP. The rat prostate gland seems to be part...

journal_title：Environmental health perspectives

authors： Thomas JA,Curto KA,Thomas MJ

更新日期：1982-11-01 00:00:00

abstract：:The reported incidence of acute respiratory illness in families exposed to different concentrations of air pollution was studied during two consecutive school years. The purpose of the study was to determine the effect of increased exposure to sulfur dioxide and suspended particulate matter. In each of four study comm...

journal_title：Environmental health perspectives

authors： Love GJ,Lan SP,Shy CM

更新日期：1982-04-01 00:00:00

abstract：:It is necessary but not sufficient to develop laboratory animal models in sensory behavioral toxicology for screening toxic substances and for the analysis of sensory impairment at threshold levels of stimulation. It is important to develop more thorough and quantitative tests of impairment which in their greater comp...

journal_title：Environmental health perspectives

authors： Stebbins WC

更新日期：1982-04-01 00:00:00

abstract：:Impairment of any of the major components of the immune system (T-cells, B-cells phagocytes, complement) may result in clinical immunodeficiency. Immune defects can arise from intrinsic or heritable defects of lymphoid elements, failure of normal cellular differentiation, viral infection or other acquired causes. Clin...

journal_title：Environmental health perspectives

authors： Heise ER

更新日期：1982-02-01 00:00:00

abstract：:A brief description of chromosome aberrations and sister chromatid exchange (SCE) as cytogenetic endpoints for evaluation of DNA damaging agents is presented. Problems associated with the use of cytogenetic assays as population monitors of radiation and chemical exposures are discussed. Adequate cell sample size requi...

journal_title：Environmental health perspectives

authors： Conner MK,Wald N

更新日期：1981-12-01 00:00:00

abstract：:The types of biological response to an environmental agent can depend on dose, thus in this case a family of widely different dose-response relationships would be expected. For those situations where the magnitude of the effect may be determined on probabilistic grounds as a function of dose ("stochastic" model), no p...

journal_title：Environmental health perspectives

authors： Radford EP

更新日期：1981-12-01 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

authors： Murphy EA

更新日期：1981-12-01 00:00:00

abstract：:Attention has been focussed, both in man and experimental animals, on the effects of inhalation of the gas monomer, vinyl chloride. Recently, note is being taken of the possible effects of the inhalation of the polymer in man. The particles in question are those produced commercially as paste polymer or dispersion pol...

journal_title：Environmental health perspectives

authors： Wagner JC,Johnson NF

更新日期：1981-10-01 00:00:00

abstract：:Consideration of needs for public health interventions and new research requires comparative assessments of the health benefits that are likely to result from alternative uses of limited regulatory and technical resources. This paper briefly examines regulatory and research priorities in the light of recent informatio...

journal_title：Environmental health perspectives

authors： Hattis D

更新日期：1981-10-01 00:00:00

abstract：:Poly(vinyl chloride) resins are produced by four basic processes: suspension, emulsion, bulk and solution polymerization. PVC suspensions resins are usually relatively dust-free and granular with varying degrees of particle porosity. PVC emulsion resins are small particle powders containing very little free monomer. B...

journal_title：Environmental health perspectives

authors： Wheeler RN Jr

更新日期：1981-10-01 00:00:00

abstract：:The capacity of in vitro bioassays to detect the potential carcinogenicity of metal compounds is reviewed. The in vitro bioassays discussed include: bacterial reversion analysis to determine the capacity of metal salts to revert Salmonella typhimurium histidine auxotrophs or to revert Escherichia coli WP 2 tryp- to tr...

journal_title：Environmental health perspectives

authors： Sirover MA

更新日期：1981-08-01 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

authors： Lee EW,Kocsis JJ,Snyder R

更新日期：1981-06-01 00:00:00

abstract：:The effect of sodium selenite administered intragastrically in repeated doses to rats receiving ethylmercuric chloride po in various repeated doses (0.25 or 2.5 mg Hg/kg) on the excretion, whole-body retention, and organ distribution of mercury was studied. Selenium was found to affect the distribution of ethylmercury...

journal_title：Environmental health perspectives

authors： Brzeźnicka EA,Chmielnicka J

更新日期：1981-06-01 00:00:00

abstract：:This paper will briefly outline those elements which must be considered in assessing the effects of any given compound which might impinge on the actions of adrenocortical steroids. Considerations that ought to be taken into account include the following: the delivery to the affected cells of corticosteroids, the upta...

journal_title：Environmental health perspectives

authors： Thompson EB

更新日期：1981-04-01 00:00:00

abstract：:The Sertoli cell is the primary target for FSH action in the mammalian testis. These cells contain the majority of testicular plasma membrane receptors for this hormone. Receptor occupancy is directly correlated with a stimulation of adenylyl cyclase and a decrease in the activity of a cytoplasmic Ca++-sensitive cAMP ...

journal_title：Environmental health perspectives

authors： Tindall DJ,Tash JS,Means AR

更新日期：1981-04-01 00:00:00

abstract：:Pollen of Impatiens sultanii Hook F. germinates and forms tubes rapidly at 25 degrees C in a simple medium containing 111.0 ppm CaCl2, 13.6 ppm KH2PO4, and 1000 ppm boric acid. Calcium, potassium, and boron are essential for germination and tube growth, but sucrose is not required. Pollen tubes grow with equal rapidit...

journal_title：Environmental health perspectives

authors： Bilderback DE

更新日期：1981-01-01 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

authors： Francis BM,Hansen LG,Fukuto TR,Lu PY,Metcalf RL

更新日期：1980-06-01 00:00:00

abstract：:The instrumentation and practical circuitry required for the detection of negative ions exiting the mass analysis section of a mass spectrometer is examined. The potentials needed to bias the electron multiplier when detecting negative ions from a low ion-energy mass spectrometer, e.g., a quadrupole, are contrasted wi...

journal_title：Environmental health perspectives

authors： McKeown M

更新日期：1980-06-01 00:00:00

abstract：:The gas phase reactions of carbanions with molecular oxygen in both its ground state (X3 sigma g-) and first electronically excited state (a1 delta g) have been studied by the flowing afterglow technique. Reactions include cleavage processes, charge transfer, hydride transfer, formation of hydroxide ion and processes ...

journal_title：Environmental health perspectives

authors： Bierbaum VM,Schmitt RJ,DePuy CH

更新日期：1980-06-01 00:00:00

abstract：:Direct studies of the function of a given cell type often require that the cell type be obtained in pure culture. A number of different specific metabolic activities have been attributed to pulmonary endothelial cells, yet with few exceptions the conclusions were based on indirect evidence. Thus, to improve our abilit...

journal_title：Environmental health perspectives

authors： Ryan US,Ryan JW

更新日期：1980-04-01 00:00:00

abstract：:The major aspects that must be considered in studies of the health effects of environmental pollutants are: the direct damage due to the exposure, the role of pre-existing disease, and effects of the exposure on the response to secondary stresses. In experimental studies at concentrations of air pollutants found in ur...

journal_title：Environmental health perspectives

authors： Ehrlich R

更新日期：1980-04-01 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

authors： Lipkin LE

更新日期：1980-02-01 00:00:00

abstract：:Syrian hamster embryo cells were treated with galactose oxidase, followed by reduction with tritiated sodium borohydride at pH 7.4. The labeling patterns of galactosyl and N-acetyl galactosaminyl residues on the cell surface were altered in comparing scraped vs. unscraped and buffer vs. media-soaked cells treated with...

journal_title：Environmental health perspectives

authors： Newman HA,Saat YA,Hart RW

更新日期：1980-02-01 00:00:00

abstract：:Mineral fibers and particulates represent one of the best documented, economically important, and ubiquitously occurring categories of human carcinogens. Yet, while a wealth of information exists concerning the mechanism of action of physical, chemical, and viral carcinogens, virtually nothing is known relative to the...

journal_title：Environmental health perspectives

authors： Hart RW,Daniel FB,Kindig OR,Beach CA,Joseph LB,Wells RC

更新日期：1980-02-01 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

authors： Macek KJ

更新日期：1980-02-01 00:00:00

abstract：:The anatomy of the intestine is outlined. The kinetics of cell proliferation, differentiation, and migration in intestinal epithelium are described. The distribution of cell types between the proliferation and differentiation compartments of the epithelium is summarized. Seven preparations of intestine in current use ...

journal_title：Environmental health perspectives

authors： Porteous JW

更新日期：1979-12-01 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

authors： Heizer WD

更新日期：1979-12-01 00:00:00

abstract：:The best evidence of an adverse human health effect is a properly conducted epidemiological study. But human beings should not be the sole test animal. Properly conducted animal studies have been shown to be preductive for carcinogenicity and toxicologic responses in human populations. We need to develop more efficien...

journal_title：Environmental health perspectives

authors： Rall DP

更新日期：1979-10-01 00:00:00

abstract：:To analyze the implications for human health, the toxicologist requires four sets of data: the results of toxicity and other studies in animals; quantitative data on actual or potential human exposure; whatever information is available on effects of exposure in man; and the statistical extrapolations from the dose-res...

journal_title：Environmental health perspectives

authors： Golberg L

更新日期：1979-10-01 00:00:00

abstract：:Several examples of categorized data from epidemiological studies are analyzed to illustrate that more informative analysis than tests of independence can be performed by fitting models. All of the analyses fit into a unified conceptual framework that can be performed by weighted least squares. The methods presented s...

journal_title：Environmental health perspectives

authors： Grizzle JE,Koch GG

更新日期：1979-10-01 00:00:00

abstract：:A system suitable for the detection of meiotic aneuploidy is described in which various different origins of the aneuploidy can be distinguished. Aneuploid meiotic products are detected as black disomic spores held in asci containing all the products of a single meiosis. Aneuploidy may result from nondisjunction or fr...

journal_title：Environmental health perspectives

authors： Bond DJ,McMillan L

更新日期：1979-08-01 00:00:00