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Results for “POLYVINYLS”

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At least 685 records · Page 38Linked to original sources
PubMed1979

[Release of diethyl-2-hexyl phthalate from stored blood on contact with polyvinyl chloride].

Softness and flexibility of PVC are due to the addition of plasticizers in high concentration; the most used of them for blood storage bags is DEHP. In this work, a method for labelling DEHP with 14C from 14C phtalic anhydrid is given. A piece of PVC from a commercial blood bag is labelled, in our laboratory, with 14C DEHP and used to follow the kinetics of DEHP leaching in blood during storage. It is also used to study the influence of some parameters such as lipids amount of blood, shaking, and plastic sterilisation on this leaching. DEHP leaching is a three steps phenomenon and the level is not correlated to lipids content of blood. Thermal treatment of PVC and shaking have an influence on leaching. DEHP is not metabolised during blood storage at 4 degrees C and can not be detected as free molecule; it is absorbed on plasmatic proteins.

Blood Preservation↗
PubMedDate not supplied

Central nervous system malformations in relation to two polyvinyl chloride production facilities.

A modified case-control study was conducted for selected birth defects that occurred among residents who lived in areas that surrounded two vinyl chloride polymerization facilities in New Jersey. Odds ratios for central nervous system defects (ICD 9, 740-742) decreased as the distance the mothers' residences were located from the facilities increased. Higher odds ratios for central nervous system birth defects were found in the areas around the plant that had higher vinyl chloride emissions. None of the odds ratios, however, were statistically significant. The differences in concentrations of emissions from the different plants may contribute to the discrepancies reported in previous studies wherein the risk of environmental exposure to vinyl chloride was assessed.

Air Pollutants↗
PubMed1979

Application of control technology developed in the polyvinyl chloride industry to polymerization processes using acrylonitrile.

Polymerization processes for PVC are sufficiently similar to acrylonitrile polymerization processes to allow a significant transfer of control technology. This transfer should be of value to manufacturers of polyacrylonitrile, ABS/SAN resins, nitrile elastomer and latex who will need to install extensive additional controls to comply with the new permanent standard for acrylonitrile scheduled to be issued by OSHA in late 1978. Control strategies and individual controls developed to limit worker exposure in the PVC industry are described and evaluated relative to applicability to acrylonitrile polymerization processes.

Acrylonitrile↗
PubMed1975

Hematogenous dissemination of ingested polyvinyl chloride particles.

Persorption of large, hard, insoluble, solid particles in micrometer size range is observed with regularity. It is a normal biological effect on the food passage through the intestine. Persorbability of particles is determined by the size of the particles and by their consistency and hardness. PVC particles in micrometer size range are very suitable as models to study persorbability in animals and the hematogenous dissemination of PVC particles. After oral administration of PVC particles to animals, many PVC particles can be found in the blood. Through the bloodsteam they are disseminated in all organs, where individual particles can be found for a long time later.

Animals↗
PubMed1975

Mortality experience of a cohort of vinyl chloride-polyvinyl chloride workers.

These data are derived from early follow-up of individuals exposed for 5 or more years to vinyl chloride in a polymerization facility. At least 17 percent of the deaths that occurred were causally related to exposure to vinyl chloride. Longer periods of observation are required to provide information concerning the full spectrum of vinyl chloride-induced malignancies and their incidence among exposed workers. These data speak for the need to prevent exposure to vinyl chloride and for surveillance and early disease detection of those who have experienced vinyl chloride exposures in the past.

Adult↗