The etch-and-rinse strategy, however, requires a wet dentin substrate for optimal bonding [65], and controlling the humidity within the root canal is critical.
The presence of such a wet, unstable substrate, if widespread, probably would have had an adverse impact on food sources and mobility for many of the large mammal populations.
Dentin, for instance, is naturally a complex and wet substrate, requiring the application of both hydrophilic and hydrophobic materials; enamel, on the other hand, requires the application of a hydrophobic material only, since its composition is almost exclusively inorganic [1],[2].
Previous work has shown that wrinkle-assisted assembly requires strongly hydrophilic (ideally, completely wetting) substrates.
The wet substrate materials were then spread over a clean alcohol swabbed polyethylene sheet and inoculated with the spawn; prepared at the rate of 3%% on wet basis.
It is thought that this habitat diversification occurred in a stepwise manner, where the ancestors of the group occupied solid wet substrate, followed by the invasion of the shore water intersection, and finally there was the diversification into the open-water habitats.
pH was determined using pH paper introduced in the wet substrate.
Then the wet substrate was filled into 33 × 17 cm HDPE plastic bags with each bag containing 857 g (equals to 300 g dry substrate).
The spent P. eryngii substrate was fragmented by hand and sun dried for use, and after mixing thoroughly with other ingredients, the 1% sucrose was solved in required water to make sure the wet substrate contain 65% water.
The initial total bacteria count was about 1.55 × 1010 CFU mL-1 wet substrate when the chicken manure slurry was added and mixed together with the shredded pineapple leaves, chicken feed and molasses.
