This same behavior was observed for
hygroscopicity, water activity, and reducing sugars.
Therefore, latewood may present slightly better
hygroscopicity. More importantly, the "reinforcement" effect provided by latewood on radial surfaces was weakened when water penetrated the cell wall, resulting in greater decreases in HB/H[B.sub.0] on the radial surface for the three softwood species.
The b value, which characterizes the interaction between vapor and solid, observed in the Modified Halsey model was low, 0.0145, which indicates that the predominant attraction forces are of the van der Waals-type and, therefore, they can act at large distances from the surface, which contributes to a more effective
hygroscopicity during the process (Halsey, 1948).
Similarly,
hygroscopicity (particle water uptake), required to account for humidity-dependent particle optical property changes as well as particle activation conditions that mediate cloud formation, cannot be derived from remote sensing observations except under special conditions (e.g., Pahlow et al.
Moisture content, bonding strength, formaldehyde emission content, mechanical properties, and
hygroscopicity of plywood were investigated according to relevant standards.
Products from fruit powder have high
hygroscopicity, which is the ability of absorbing moisture from the air (JAYA; DAS, 2004).
Among the films, PCN prepared in the presence of Fe[Cl.sub.3] showed lowest thermal stability probably due to the highly
hygroscopicity of catalyst.
In finished products
hygroscopicity may be changed - improving stability through time or minimizing degradation reactions.
The main objective in a salt selection study is to find the form best suited for development including good aqueous solubility, high crystallinity, low
hygroscopicity (water absorbance) and optimal stability.
A ceramic powder has a great
hygroscopicity, so that at the beginning we did not even notice, that humidity content in the powder was too big.
* The
hygroscopicity was measured by the moisture sorption analyser (CI Sorp).