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Table 2 ∆E*ab values obtained with the colorimeter for two white areas of the painted remnant treated with the single (L, Lavandula angustifolia; T, Thymus vulgaris) and mixed EOs (LT) at two concentrations (1% and 10%)

From: Biodeterioration of Roman hypogea: the case study of the Catacombs of SS. Marcellino and Pietro (Rome, Italy)

Area treated

∆E*ab 1°–2° cicle

∆E*ab 2°–3° cicle

7LT wh EOs mix 1:100

2.72

2.20

3LT wh EOs mix 1:10

2.36

2.98

7L wh Lav 1:100

2.00

2.47

3L wh Lav 1:10

0.56

2.15

7T wh Thy 1:100

1.34

1.03

3T wh Thy 1:10

4.77

0.47

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Annals of Microbiology

ISSN: 1869-2044

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