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Table 1 Typical biodeteriogens/microbial groups encountered in monuments with absorption and fluorescence emission properties of key chromophores. λabs and λem refer to wavelengths reported in the literature cited

From: Development of a methodology for the characterisation and assessment of biodeteriogens on archaeological surfaces by use of a portable LED-induced fluorescence instrument

Microbial groups

Compound

λabs (nm)

References

λem (nm)

References

Algae/moss (photoautotroph)

Chlorophyll a

405, 418, 670

[19, 20]

685, 720, 735

[12, 13]

Chlorophyll b

413, 450

[19, 21]

650–660

[13, 16]

Cyanobacteria* (photoautotroph)

Phycocyanin

580, 625, 634–637

[17]

645–653

[14, 17]

Phycoerythrin

570

580, 640–660

Allophycocyanin

650

660–675

Fungi (heterotroph)

Melanin

330

[18, 22]

440, 520, 540, 575

[18, 23]

Riboflavin

371, 442

[24]

525–535

[18, 24]

NADH

290–295, 340

[18, 23]

493, 450–475

[18, 23, 25]

Chitin

330

[26]

413, 440, 452–458

[23, 26]

Tryptophan

240, 290, 340

[27]

330–340, 340–353, 363

[23, 28, 29]

Tyrosine

260

300–310

  1. *In cyanobacteria, chlorophyll a and b can also be present