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12 resultados
Popcorn worker's lung: in vitro exposure to diacetyl, an ingredient in microwave popcorn butter flavoring, increases reactivity to methacholine.
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Workers who inhale microwave popcorn butter flavorings experience decrements in lung function and can develop clinical bronchiolitis obliterans, i.e., "popcorn worker's lung" (Kreiss, K., Gomaa, A., Kullman, G., Fedan, K., Simoes, E.J., Enright, P.L., 2002. Clinical bronchiolitis obliterans in
Necrosis of nasal and airway epithelium in rats inhaling vapors of artificial butter flavoring.
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As the result of a high prevalence of fixed airways obstruction in workers at a microwave popcorn manufacturing plant, we examined the hypothesis that vapors of butter flavoring used in the manufacture of microwave popcorn and other foods can produce airway injury in rats. Rats were exposed to
Recognizing occupational effects of diacetyl: What can we learn from this history?
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For half of the 30-odd years that diacetyl-exposed workers have developed disabling lung disease, obliterative bronchiolitis was unrecognized as an occupational risk. Delays in its recognition as an occupational lung disease are attributable to the absence of a work-related temporal pattern of
Respiratory toxicologic pathology of inhaled diacetyl in sprague-dawley rats.
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Inhalation of butter flavoring vapors by food manufacturing workers causes an emerging lung disease clinically resembling bronchiolitis obliterans. Diacetyl, an alpha-diketone, is a major component of these vapors. In rats, we investigated the toxicity of inhaled diacetyl at concentrations of up to
Delineation of hypoxia in canine myocardium using PET and copper(II)-diacetyl-bis(N(4)-methylthiosemicarbazone).
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Copper(II)-diacetyl-bis(N(4)-methylthiosemicarbazone) (copper-ATSM) is a hypoxia-avid tracer for the selective identification of hypoxic tissue. Using canine models of hypoxic myocardium, we report our findings on *Cu-ATSM PET (*Cu is defined as either (60)Cu, (61)Cu, or (64)Cu) for the delineation
Application of 62Cu-diacetyl-bis (N4-methylthiosemicarbazone) PET imaging to predict highly malignant tumor grades and hypoxia-inducible factor-1α expression in patients with glioma.
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OBJECTIVE
Hypoxic tissue evaluation in glioma is important for predicting treatment response and establishing antihypoxia therapy. In this preliminary study, (62)Cu-ATSM PET was used to determine its validity as a biomarker for distinguishing tumor grade and tissue hypoxia.
METHODS
(62)Cu-ATSM PET
Flavoring-related bronchiolitis obliterans.
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OBJECTIVE
In 2000, inhalation of butter flavoring vapors was first associated with clinical bronchiolitis obliterans among workers in microwave popcorn production. Toxicologic and epidemiologic studies in the succeeding 5 years have intervention and research implications.
RESULTS
Irreversible
The effects of O-acetylsterigmatocystin and related compounds on rat liver and cultured chicken embryonal liver cells.
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Fine structural nucleolar changes induced in rat liver and primary tissue culture cells from 10-day-old chicken embryonal liver by O-acetylsterigmatocystin (AcO-stg), related compounds and aflatoxin B1 were compared. (1) Male Wistar rats were given a single i.p. injection of sterigmatocystin (stg),
Evaluation of dicarbonyls generated in a simulated indoor air environment using an in vitro exposure system.
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Over the last two decades, there has been increasing awareness regarding the potential impact of indoor air pollution on health. Exposure to volatile organic compounds (VOCs) or oxygenated organic compounds formed from indoor chemistry has been suggested to contribute to adverse health effects.
Respiratory and olfactory cytotoxicity of inhaled 2,3-pentanedione in Sprague-Dawley rats.
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Flavorings-related lung disease is a potentially disabling disease of food industry workers associated with exposure to the α-diketone butter flavoring, diacetyl (2,3-butanedione). To investigate the hypothesis that another α-diketone flavoring, 2,3-pentanedione, would cause airway damage, rats that
Flavorings-Related Lung Disease: A Brief Review and New Mechanistic Data.
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Flavorings-related lung disease is a potentially disabling and sometimes fatal lung disease of workers making or using flavorings. First identified almost 20 years ago in microwave popcorn workers exposed to butter-flavoring vapors, flavorings-related lung disease remains a concern today. In some
Inflammatory Response and Barrier Dysfunction by Different e-Cigarette Flavoring Chemicals Identified by Gas Chromatography-Mass Spectrometry in e-Liquids and e-Vapors on Human Lung Epithelial Cells and Fibroblasts.
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Recent studies suggest that electronic cigarette (e-cig) flavors can be harmful to lung tissue by imposing oxidative stress and inflammatory responses. The potential inflammatory response by lung epithelial cells and fibroblasts exposed to e-cig flavoring chemicals in addition to other
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