At intermediate saturation (10, 50, 75%), the range between the saline solutions collected close to the stone surface and those from deeper drilling levels is remarkable, with salts being concentrated in the outermost 0.5 cm near the surface.
An infrared camera measured: (a) the moisture stain due to the water absorption after having spilled a drop on the stone surface and (b) the "moisture ring" around the damp surface, after the contact between a soaked round sponge and the stone surface.
Her favorite line is Stone Care International (stonecare.com); the Marbamist spray cleaner ($24.98 a gallon) works well on granite and other stone surfaces, and the Stoneglide wipes ($13.34 for a box of 50 sheets) can be used to touch up a countertop several times a week.
Additional investigation of various biogeochemical and biogeophysical alterations brought about by action of microorganisms on stone surfaces and the mechanistic studies of alterations is equally worthy to be researched out.
The conservation strategy in this case should then aim at two objectives: the protection of the very external and weathered part of the stone surfaces and the reduction of the soiling effect induced by the accumulation of particulate matter in sheltered condition.
Since RA consists of exposed stone surfaces and the attached paste/mortar from the original ordinary Portland cement (OPC) concrete, both the ITZ between GP and natural aggreate (NA) and that between GP and residual OPC paste/mortar (ROPM) were studied.
Evaluation of the factors promoting microbial activity (microbial adherence, growth and survival) on stone surface and understanding the mechanism of deterioration caused to stone surface by them is very essential for designing an appropriate conservation and restoration strategy[70].
Noonday lighting can supply contrast of bright light on the stone surface and darker shadows inside the engraving.
Thus, the highest daily amplitudes of 48.1 and 47.5 K were also reached at the quartz stone surface and soil surface, respectively, whereas under the thin and thick quartz stones, amplitudes of only 39.4 and 36.0 K were recorded, respectively (Table 2). Figure 5 Winter temperatures measured at different locations during a characteristic time span, June 22 26, 2006.
Groups create a breeding shelter for the breeders (where eggs are laid on the stone surface) and hiding shelters for all group members [31], [51].
