The fate of trenbolone acetate and melengestrol acetate after application as growth promoters in cattle: environmental studies.

abstract：BACKGROUND:Ubiquitous polycyclic aromatic hydrocarbons (PAHs) have been shown to alter gene expression patterns and elevate micronuclei (MN) frequency, but the underlying mechanisms are largely unknown. MicroRNAs (miRNAs) are key gene regulators that may be influenced by PAH exposures and mediate their effects on MN fr...

journal_title：Environmental health perspectives

authors： Deng Q,Huang S,Zhang X,Zhang W,Feng J,Wang T,Hu D,Guan L,Li J,Dai X,Deng H,Zhang X,Wu T

更新日期：2014-07-01 00:00:00

abstract：BACKGROUND:Chronic exposure to well water arsenic (As) remains a major rural health challenge in Bangladesh and some other developing countries. Many mitigation programs have been implemented to reduce As exposure, although evaluation studies for these efforts are rare in the literature. OBJECTIVES:In this study we es...

journal_title：Environmental health perspectives

authors： Khan K,Ahmed E,Factor-Litvak P,Liu X,Siddique AB,Wasserman GA,Slavkovich V,Levy D,Mey JL,van Geen A,Graziano JH

更新日期：2015-12-01 00:00:00

abstract：:It was considered that the fall in lung function seen after exposure to cotton dust may be attributable in part to the activity of arachidonic acid metabolites, such as leucotrienes as well as to the more established release of histamine by cotton dust. However, we found that cotton and barley dusts elicited poor rele...

journal_title：Environmental health perspectives

authors： Thomson TA,Edwards JH,Al-Zubaidy TS,Brown RC,Poole A,Nicholls PJ

更新日期：1986-04-01 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

authors： Hose JE,Guillette LJ

更新日期：1995-05-01 00:00:00

abstract：:There are a number of technical and statistical problems in monitoring the temporal and spatial variation of local area death rates in the United States for evidence of systematically elevated risks. An analytic strategy is proposed to reduce one of the major statistical concerns, i.e., that of identifying areas with ...

journal_title：Environmental health perspectives

authors： Manton KG,Stallard E,Creason JP,Riggan WB

更新日期：1985-05-01 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

authors： Crecelius E,Yager J

更新日期：1997-06-01 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

authors： Holloman CH,Bortnick SM,Morara M,Strauss WJ,Calder CA

更新日期：2004-09-01 00:00:00

abstract：BACKGROUND:Polychlorinated biphenyls (PCBs) may accelerate the cognitive and motor dysfunction found in normal aging, but few studies have examined these outcomes and PCB exposure among older adults. OBJECTIVE:We evaluated neuropsychological status and low-level PCB exposure among older adults living along contaminate...

journal_title：Environmental health perspectives

authors： Fitzgerald EF,Belanger EE,Gomez MI,Cayo M,McCaffrey RJ,Seegal RF,Jansing RL,Hwang SA,Hicks HE

更新日期：2008-02-01 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

authors： Goldfarb S,Pugh TD,Koen H,He YZ

更新日期：1983-04-01 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

authors： Ridgway RL,Tinney JC,MacGregor JT,Starler NJ

更新日期：1978-12-01 00:00:00

abstract：:The formation of reactive oxygen species resulting from the interaction of silica dust particles with red blood cell membranes was investigated; particularly, the effect of surface hydroxyl (silanol) group concentration on the rate of formation of such reactive oxygen species was investigated. The rate of formation wa...

journal_title：Environmental health perspectives

authors： Razzaboni BL,Bolsaitis P

更新日期：1990-07-01 00:00:00

abstract：BACKGROUND:Dissecting complex disease has become more feasible because of the availability of large-scale DNA resources and advances in high-throughput genomic technology. Although these tools help scientists identify potential susceptibility loci, subjects with relevant genotypes are needed for clinical phenotyping an...

journal_title：Environmental health perspectives

authors： Chulada PC,Vainorius E,Garantziotis S,Burch LH,Blackshear PJ,Zeldin DC

更新日期：2011-11-01 00:00:00

abstract：:Lead-induced nephropathy produces both tubular and interstitial manifestations of cell injury, but the pathophysiology of these lesions is not completely understood. Delineation of the molecular factors underlying renal handling of lead is one of central importance in understanding the mechanisms of renal cell injury ...

journal_title：Environmental health perspectives

authors： Fowler BA,DuVal G

更新日期：1991-02-01 00:00:00

abstract：BACKGROUND:Particulate matter ≤ 2.5 μm in aerodynamic diameter (PM2.5) has been consistently associated with preterm birth (PTB) to varying degrees, but roles of PM2.5 species have been less studied. OBJECTIVE:We estimated risk differences (RD) of PTB (reported per 106 pregnancies) associated with change in ambient co...

journal_title：Environmental health perspectives

authors： Rappazzo KM,Daniels JL,Messer LC,Poole C,Lobdell DT

更新日期：2015-10-01 00:00:00

abstract：:To evaluate the effectiveness of mass screening for uterine cancer in Japan, we compared the changes in the age-adjusted rates of potential years of life lost (PYLL) due to uterine cancer between 1969 and 1972 to 1973 through 1977 between the high coverage-rate (intensively screened) areas and the comparable control a...

journal_title：Environmental health perspectives

authors： Kuroishi T,Hirose K,Tominaga S

更新日期：1990-07-01 00:00:00

abstract：BACKGROUND:Although a long latency period of toxicity after exposure to methylmercury (MeHg) is known to exist in humans, few animal studies have addressed this issue. Substantiation of delayed MeHg toxicity in animals would affect the risk evaluation of MeHg. OBJECTIVES:Our goal in this study was to demonstrate the e...

journal_title：Environmental health perspectives

authors： Yoshida M,Shimizu N,Suzuki M,Watanabe C,Satoh M,Mori K,Yasutake A

更新日期：2008-06-01 00:00:00

abstract：BACKGROUND:The biological mechanisms involved in inflammatory response to air pollution are not clearly understood. OBJECTIVE:In this study we assessed the association of short-term air pollutant exposure with inflammatory markers and lung function. METHODS:We studied a cohort of 158 asthmatic and 50 nonasthmatic sch...

journal_title：Environmental health perspectives

authors： Barraza-Villarreal A,Sunyer J,Hernandez-Cadena L,Escamilla-Nuñez MC,Sienra-Monge JJ,Ramírez-Aguilar M,Cortez-Lugo M,Holguin F,Diaz-Sánchez D,Olin AC,Romieu I

更新日期：2008-06-01 00:00:00

abstract：BACKGROUND:Methylmercury (MeHg) may affect fetal growth; however, prior research often lacked assessment of mercury speciation, confounders, and interactions. OBJECTIVE:Our objective was to assess the relationship between MeHg and fetal growth as well as the potential for confounding or interaction of this relationshi...

journal_title：Environmental health perspectives

authors： Wells EM,Herbstman JB,Lin YH,Jarrett J,Verdon CP,Ward C,Caldwell KL,Hibbeln JR,Witter FR,Halden RU,Goldman LR

更新日期：2016-03-01 00:00:00

abstract：:Organophosphates in increasing amounts and wider varieties of molecular structure are being used to replace the organochlorine pesticides. It has been assumed that the organophosphates as a class would have a minimal chronic toxicity due to rapid hydrolysis and an unfavorable partitioning as regards to lipids. The phy...

journal_title：Environmental health perspectives

authors： Freed VH,Haque R,Schmedding D,Kohnert R

更新日期：1976-02-01 00:00:00

abstract：:The formamidines, a relatively new group of acaricide-insecticides, are novel both in their range of biological activities and in their mode of action, which is presently unknown. This paper is a review of the historical development, properties, structures, uses, and chemistry of this group of pesticides, with particu...

journal_title：Environmental health perspectives

authors： Hollingworth RM

更新日期：1976-04-01 00:00:00

abstract：:The main source of cadmium in the diet is cereal or meat, especially in liver and kidney. Since the cadmium in both liver and kidney is bound to metallothionein, a heat-stable protein, the gastrointestinal absorption and metabolism of cadmium metallothionein (CdMt) was studied in detail. The selective renal cadmium de...

journal_title：Environmental health perspectives

authors： Cherian MG

更新日期：1979-02-01 00:00:00

abstract：BACKGROUND:The mechanisms governing the correlation between exposure to ultrafine particles and the increased incidence of cardiovascular disease remain unknown. Ultrafine particles appear to cross the pulmonary epithelial barrier into the bloodstream, raising the possibility of direct contact with the vascular endothe...

journal_title：Environmental health perspectives

authors： Gojova A,Guo B,Kota RS,Rutledge JC,Kennedy IM,Barakat AI

更新日期：2007-03-01 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

authors： Petreas M,She J,Brown FR,Winkler J,Windham G,Rogers E,Zhao G,Bhatia R,Charles MJ

更新日期：2003-07-01 00:00:00

abstract：BACKGROUND:Lead (Pb) exposure may influence the plasma concentration of homocysteine, a one-carbon metabolite associated with cardiovascular and neurodegenerative diseases. Little is known about the associations between Pb and homocysteine over time, or the potential influence of dietary factors. OBJECTIVES:We examine...

journal_title：Environmental health perspectives

authors： Bakulski KM,Park SK,Weisskopf MG,Tucker KL,Sparrow D,Spiro A 3rd,Vokonas PS,Nie LH,Hu H,Weuve J

更新日期：2014-10-01 00:00:00

abstract：:This paper reports on the prevalence of lead poisoning in children between 1 and 5 years of age living in a marginal area to the north of Mexico City and also includes an evaluation of sources of exposure to this metal in the same area. The results show that 67.5% of the children studied have blood lead (PbB) levels >...

journal_title：Environmental health perspectives

authors： López-Carrillo L,Torres-Sánchez L,Garrido F,Papaqui-Hernández J,Palazuelos-Rendón E,López-Cervantes M

更新日期：1996-11-01 00:00:00

abstract：BACKGROUND:Previous literature suggests an association between organochlorines and behavioral measures in childhood, including inattention. OBJECTIVE:This study was designed to assess whether prenatal organochlorine exposure is associated with measures of attention in early infancy. METHODS:We investigated an associa...

journal_title：Environmental health perspectives

authors： Sagiv SK,Nugent JK,Brazelton TB,Choi AL,Tolbert PE,Altshul LM,Korrick SA

更新日期：2008-05-01 00:00:00

abstract：:Dose influences mechanism; and over a wide range of doses, one can envision that mechanism will change with changing dose. This basic concept in toxicology is juxtaposed with the biologic importance of maintaining normal DNA methylation status to provide the focus of this paper. The idea that altered DNA methylation p...

journal_title：Environmental health perspectives

authors： Goodman JI

更新日期：1998-02-01 00:00:00

abstract：:To set occupational exposure limits (OELs) for aerosol particles, dusts, or chemicals, one has to evaluate whether mechanistic considerations permit identification of a no observed effect level (NOEL). In the case of carcinogenic effects, this can be assumed if no genotoxicity is involved, and exposure is considered s...

journal_title：Environmental health perspectives

authors： Greim HA,Ziegler-Skylakakis K

更新日期：1997-09-01 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：:In different weather conditions, constituents and concentrations of pollutants, personal exposure, and biologic responses to air pollution may vary. In this study we assessed the effects of four air pollutants on mortality in both cool and warm seasons in Hong Kong, a subtropical city. Daily counts of mortality, due t...

journal_title：Environmental health perspectives

authors： Wong CM,Ma S,Hedley AJ,Lam TH

更新日期：2001-04-01 00:00:00