Even though the actual exposition conditions of the series can be considered very challenging and rather far from those generally encountered on bronze statues exposed outdoor, the conservation and maintenance strategy here reported, based on the use of sacrificial protective layers, represents a suitable alternative also in more traditional conditions.
In order to distinguish differences in gene expression due to direct light exposition from those generated by circadian rhythmicity, we compared retinas obtained at the same time of the day, after 1.5 h of light exposition (condition 2) compared to the retinas obtained in sibling mice kept during all this time in the dark after the night cycle (condition 1).
Similarly, Cbx4 and Desi1 (pattern II) had a constant increase of expression from condition 1 to 4. The retinal transcription factor Nr2e3 (pattern III) showed a sharp peak in response to light exposition (condition 2) that steadily decreased to the initial levels (condition 4 and 1).
We also observed that PEG-SPION are tolerable (unchanged cell viability) to A549, MDA-MB-231 and Jurkat cells in the range of 0.1 2.5 [Fe] mM, when subjected to the field under similar exposition conditions (see Fig. 8).
However some problems may arise with the use of traditional FRP (Fiber Reinforced Polymer), particularly when the compatibility with the substrate and the reversibility of the intervention are required, as in case of cultural heritage buildings, or specific exposition conditions may compromise the long term effectiveness of the reinforcement, as in presence of high temperature and humidity.
In particular, frequent cleaning is required because using demineralised water is normally not possible in most exposition conditions so that already after few weeks of display the statues show significant encrustation of calcareous deposits.
To provide a sound basis for an improved risk assessment for PPD and related aryldiamines as well as for further regulative decisions, further efforts to uncover their reaction pathways and products formed under human exposition conditions seem to be inevitable.
The distances in-between adjacent subsets are assumed to be identical just to facilitate the exposition by simplifying the contractive condition to the form (2.1) so as to make less involved their associate calculations.
The exposition time is adjusted according to the conditions of the night sky (typically, 30-s expositions are employed).
Nevertheless, in order to simplify the exposition that follows, we use the same terminology of "perceived position" and "perceived self-motion" for the sighted walking condition as we use for the blind walking condition.
