Sentences with phrase «analyse microscopic samples»
Monico also used high - powered X-rays to analyse microscopic samples from the painting and found that some of the lead chromate at the painting's surface had turned into greenish chromium oxide, which combined with the underlying yellow to produce a darker and browner hue than van Gogh may have intended.
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The archaeologists analysed 16 samples of microscopic plant remains from ten different time periods found during excavations during 2014 led by the University of São Paulo in South West Amazonia.