title: [Biological activity of Bulgarian zeolite rocks].
abstract: An evaluation of the biological activity of Bulgarian zeolite rocks was made by the methods in vivo and in vitro. The results pointed out to specific biological effect--cytotoxic and fibrogenic--most strongly expressed for clinoptilolite followed by mordenite and erionite. The clinoptilolite is characterized by strong cytotoxic effect in comparison with dust of calibrated quartz DQ-12 which confirms the lack of correlation between cytotoxicity and fibrogenicity for some types of dust. On the basis of the results a temporary hygienic norm for clinoptilolite dust--2 mg/m3 is proposed.
mesh_terms: D000538:Aluminum Silicates / Q000633:toxicity*; D000818:Animals; D002031:Bulgaria; D004391:Dust / Q000009:adverse effects; D006461:Hemolysis / Q000187:drug effects; D066298:In Vitro Techniques; D008168:Lung / Q000187:drug effects; D008452:Maximum Allowable Concentration; D011658:Pulmonary Fibrosis / Q000139:chemically induced; D011791:Quartz / Q000633:toxicity; D051381:Rats; D013997:Time Factors; D014481:United States; D017641:Zeolites
chemical_list: D000538:Aluminum Silicates; D004391:Dust; C048397:mordenite; D017641:Zeolites; D011791:Quartz
vernacular_title: Biologichna aktivnost na bŭlgarski zeolitni skali.