Table 4. Morphological characteristics of the beads.
Sample | d/mm | SF | kSF(drying) | ||
---|---|---|---|---|---|
Wet | Dried | Wet | Dried | ||
Blank | 2.00±0.04 | 1. 4±0.2 | 0.233 | 0.391 | 0.302 |
Lavender | 1.51±0.07 | 0.9±0.2 | 0.241 | 0.521 | 0.397 |
Bergamot | 1.6±0.9 | 1.2±0.1 | 0.294 | 0.407 | 0.367 |
Tea tree | 1.58±0.08 | 1. 1±0.1 | 0.238 | 0.541 | 0.331 |
Peppermint | 1.46±0.09 | 1.0±0.1 | 0.225 | 0.402 | 0.348 |
SF=sphericity factor of the beads before and after freeze drying, kSF(drying)=shrinkage factor of the beads after freeze drying. Values are expressed as mean±standard deviation (N=15)