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361169

INHIBITION EFFECT OF LASER, GAMMA RAYS, AND SOME NATURAL PLANT EXTRACTS ON FUNGAL DETERIORATIN ON STUCCO MONUMENTS

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Last updated: 03 Jan 2025

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Abstract

Architectural and museum stucco belonging to several civilizations are suffering from microbiological deterioration aspects. Several types of laser, gamma rays and natural plants extract were performed to assess their suitability and sustainability for inhibition of fungal deterioration in stucco models. The Fourth Harmonic of Nd: Yag266 (power density= 71 mW/cm2) is the most potent type in inhibition of fungi in a least time for exposure (20: 30 minutes). Irradiated A. parasiticus stucco mockup confirmed that results. The use of ND-YAG Laser 266 nm (Power density= 7.03× 108W/cm2) was effective in eliminating fungi from stucco models without damaging its surface and preserving the patina layer. The time required to clean 1 cm2 of flat parts of the stucco mockup is 8: 10 min and for 1 cm2 of sunken parts whose depth is 3 mm is 15: 20 min. Gamma ray was successful in elimination of the total tested fungi at the rays level of 750 Kr, without any effects on stucco models. The inhibitory mixture of seed extract of neem and thyme (1:1) was effective in inhibition of fungal infection. The result of the monthly follow-up for a period of six months indicated that the fungal growth appears at the end of the fifth month with a heavy growth within the sunken places and represented by A. niger, A. flauvs and A. flavipes, in a ratio of 34:19:1.

DOI

10.21608/ejars.2024.361169

Keywords

ND, YAG Laser Gamma rays Neem extracts Thyme extracts Stucco Fungi

Authors

First Name

Afifi,

Last Name

H.

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Affiliation

Conservation dept., Faculty of Archaeology, Cairo Univ., Giza, Egypt.

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First Name

El-Morsy,

Last Name

E.

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Affiliation

Botany and Microbiology dept., Faculty of Sciences, Damietta Univ., Damietta, Egypt.

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First Name

Mahmoud,

Last Name

H.

MiddleName

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Affiliation

Laser Physics & Spectroscopy, National Institute of Laser Enhanced Sciences (NILES), Cairo

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First Name

Shata,

Last Name

M.

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Affiliation

Ministry of Antiquities Dakahlia and Damietta Sector, Damietta, Egypt.

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Volume

14

Article Issue

1

Related Issue

48555

Issue Date

2024-06-01

Receive Date

2023-08-22

Publish Date

2024-06-01

Page Start

51

Page End

59

Print ISSN

2090-4932

Online ISSN

2090-4940

Article File

EJARS_Volume 14_Issue 1_Pages 51-59.pdf

PDF . 869.5kB

Link

https://ejars.journals.ekb.eg/article_361169.html

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https://ejars.journals.ekb.eg/service?article_code=361169

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Original Article

Type Code

575

Publication Type

Journal

Publication Title

Egyptian Journal of Archaeological and Restoration Studies

Publication Link

https://ejars.journals.ekb.eg/

MainTitle

INHIBITION EFFECT OF LASER, GAMMA RAYS, AND SOME NATURAL PLANT EXTRACTS ON FUNGAL DETERIORATIN ON STUCCO MONUMENTS

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Article

Created At

30 Dec 2024