It is thus assumed that any organic material is hygroscopically inactive and that no surface active material is present. |
The peristome teeth operate hygroscopically to move the diaphragm up into the wind. |
Most preferably, the hygroscopically sensitive material is a hydrolyzed vegetable protein. |
They are said to be safe from folk stealing bits of them because the crystals dissolve into mush hygroscopically. |