Zobrazeno 1 - 5
of 5
pro vyhledávání: '"Rachael D. Wakefield"'
Autor:
Melanie S. Jones, Rachael D. Wakefield
Publikováno v:
Quarterly Journal of Engineering Geology. 31:301-313
Over the last decade, the concept of stone decay being caused solely by one or two processes has been revised in favour of a more holistic notion that many operate together, are synergistic and possibly cyclical or seasonal. Certain of these processe
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::cee9d9ca8c5002d503ea46faf5064956
https://doi.org/10.1144/gsl.qjeg.1998.031.p4.03
https://doi.org/10.1144/gsl.qjeg.1998.031.p4.03
Publikováno v:
SPIE Proceedings.
The application of an hand-held fluorometer used to monitor algal growth on stone surfaces is reported. The system is based on a modulated ultra-bright blue LED, used to induce chlorophyll-a fluorescence, as well as that of accessory pigments. With t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fb95479bb68ec64aab6150b71b514e85
https://doi.org/10.1117/12.323527
https://doi.org/10.1117/12.323527
Publikováno v:
SPIE Proceedings.
Algal growth on stones, together with the deposition of other soiling layers, cause major conservation problems for buildings and monuments, as it not only covers the surface with a green layer, but also accelerates stone decay. In recent years laser
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::276f212d98c7a8f67666aaa7c076e558
https://doi.org/10.1117/12.273546
https://doi.org/10.1117/12.273546
Publikováno v:
SPIE Proceedings.
Initial results from studies of the effect of high power 1064 nm light from a Q-switched Nd:YAG laser on Scottish granites, commonly used in buildings and monuments, are described. Pink granites, were shown to undergo bleaching at energy densities cl
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1d51207b1a0aebc80b6310d2aeb4074a
https://doi.org/10.1117/12.270035
https://doi.org/10.1117/12.270035
Publikováno v:
Advanced Technologies for Environmental Monitoring and Remediation.
A Scanning Fluorescence Microscope system for quantifying and mapping biological growth on stone is described. The system uses 488 nm light from an Argon-ion laser to excite the 685 nm fluorescence from the Chlorophyll-a in the algae and uses this as
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::465ccd9d382aef14343bd94f802227bf
https://doi.org/10.1117/12.259784
https://doi.org/10.1117/12.259784