Inverse bond-hardening

We also show, in the panels (c-1) to (c-3) in Fig. 8.2, the snapshots of the dynamics of w = 5 with the peak field intensity / = 50 TW cm, which is at the peak of the dissociation probabihty oscillation. Here the development of a local maximum in QES near the la resonant point seems to push out a portion of the wavepacket. Hence the imderlying mechanism is the same as the normal bond-hardening seen in the dynamics at the peak field intensity J = 60 TW cm , although the outcome is opposite. We thus term it inverse bond-hardening . 

To summarize, we have thus shown that an interplay of bond-softening and bond-hardening can be clearly seen in the snapshots of time-dependent QESs and wavepacket dynamics on them, which is clearly understood in terms of the quasi-classical approximation. In fact our simulation serves as a direct real-time demonstration of possibly competing bondsoftening and bond-hardening mechanisms, and moreover, has suggested a possible phenomenon, the inverse bond-hardening. The additional... 

Further discussions on physicai conditions are necesssary for inverse bond-hardening, bond-softening, and bond-hardening to be observed experimentally. 

The failure of the interfaee between the resin and the wood surfaee (replacement of physieal bondings between resin and reaetive wood surfaee sites by water or other nonresin ehemieals). The adhesion of UF resins to eellulose is sensitive to water not only due to the already mentioned lability to hydrolysis of the methylene bridge and of its partial reversibility, but also beeause theoretical calculations have shown that on most eellulose sites the average adhesion of water to eellulose is stronger than that of UF oligomers [8,48]. Thus, water can displace hardened UF resins from the surface of a wood joint. The inverse effect is valid for PF resins [8,49]. 

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