Environment-Friendly Poly(2-ethyl-2-oxazoline) as an Innovative Consolidant for Ancient Wall Paintings.

Nanomaterials (Basel) · 2018 · PMC6165377 · PMID 30142891

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an increasing trendno p-value reported

For example, the nanoscale materials are adopted in the cleaning and consolidation of ancient monuments with an increasing trend [ 5 , 6 , 7 ].

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Quoted from the open-access full text in Europe PMC under the licence the publisher applied. The sentence is reproduced exactly as published; the emphasis is ours.