Skip to main content

Observations of Scytonema-colonized and
non-colonized fiber cement roofing shingles.

EMSL Project ID
4996

Abstract

 Fiber cement roofing shingles colonized with Scytonema sp. and other cyanobacteria are failing. One mechanism proposed to explain the observed deterioration is the breakdown of the cementicious portion of the shingle due to expansion and contraction from hydration and dehydration of the mucilaginous sheath of the Scytonema sp. filaments that have penetrated the shingles. Observation and documentation of the hydration/dehydration process of these samples with the environmental scanning electron microscope will provide greater understanding of the deterioration process.

Project Details

Project type
Exploratory Research
Start Date
2003-10-07
End Date
2005-10-27
Status
Closed
Released Data Link
https://search.emsl.pnnl.gov/?project_id_search=4996

Team

Principal Investigator

Barbara Reine
Institution
Lab/Cor, Inc.

Related Publications

Crysten E. Blaby-Haas, Rory J. Craig, Lital Davidi, Sean D. Gallaher, Iniyan Ganesan, Jane Grimwood, Tim L. Jeffers, Mary S. Lipton, Sean R. McCorkle, Sabeeha S. Merchant, Krishna K. Niyogi, Samuel O. Purvine, Melissa S. Roth, Jeremy Schmutz, Daniela Strenkert, Steven M. Theg. 2021. "Widespread polycistronic gene expression in green algae." Proceedings of the National Academy of Sciences 118 (7):e2017714118. 10.1073/pnas.2017714118
Grant J.S., P.M. Richards, C.R. Anderton, Z. Zhu, T.E. Mattes, and S.K. Shaw. 2019. "Passively Sampled Environmental Films Show Geographic Variability and Host a Variety of Microorganisms." ACS Earth and Space Chemistry 3, no. 12:2726-2735. PNNL-SA-148657. doi:10.1021/acsearthspacechem.9b00234
Grant, J.S.; Shaw, S.K. Native urban films? spatial and chemical heterogeneity reported by microscopy and SIMS analysis. From Abstracts of Papers, 255th ACS National Meeting, New Orleans, LA, United States, March 18-22, 2018. COLL 788.
Grant J.S., Z. Zhu, C.R. Anderton, and S.K. Shaw. 2019. "The Chemical and Physical Morphology of Passively Sampled Environmental Films." Environmental Science & Technology. PNNL-SA-139413. doi:10.1021/acsearthspacechem.8b00158
Mazzoleni C., and S. China. 2018. "Preface: Morphology and Internal Mixing of Atmospheric Particles." PNNL-SA-135996. Richland, WA: Pacific Northwest National Laboratory.
Zuniga C., T. Li, M. Guarnieri, J. Jenkins, C. Li, A.K. Bingol, and Y. Kim, et al. 2020. "Synthetic microbial communities of heterotrophs and phototrophs facilitate sustainable growth." Nature Communications 11. PNNL-SA-152360. doi:10.1038/s41467-020-17612-8