Barely Significant
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Assessment of the potential respiratory hazard of volcanic ash from future Icelandic eruptions: a study of archived basaltic to rhyolitic ash samples.

Environ Health · 2017 · PMC5594494 · PMID 28893249

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a strong trendno p-value reported
While a dependence on magmatic composition has been observed previously [ 54 , 55 ], where Fe-rich mafic samples generate more hydroxyl radicals than comparatively Fe-poor silicic samples, a strong trend was not observed in the present study.

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