Microencapsulation of Ruellia tuberosa L. Aqueous Root Extracts Using Chitosan-Sodium Tripolyphosphate and Their In Vitro Biological Activities

Table 1

Encapsulation efficiency of microcapsules of R. tuberosa L. prepared in various pH, stirring time, and chitosan concentration.

Sample	% EE	Sample	% EE	Sample	% EE
Microcapsules prepared in pH 3	19.61 ± 0.30^b	Microcapsules prepared in 60 min stirring time	9.21 ± 1.20^a	Microcapsules prepared in chitosan 0.05% (w/v)	12.84 ± 2.19^c
Microcapsules prepared in pH 4	22.51 ± 1.23^c	Microcapsules prepared in 90 min stirring time	31.8 ± 5.34^c	Microcapsules prepared in chitosan 0.10% (w/v)	51.81 ± 8.15^d
Microcapsules prepared in pH 5	7.21 ± 0.76^a	Microcapsules prepared in 120 min stirring time	9.95 ± 1.21^b	Microcapsules prepared in chitosan 0.20% (w/v)	7.10 ± 0.91^b
Microcapsules prepared in pH 6	6.24 ± 0.89^a	Microcapsules prepared in 150 min stirring time	8.89 ± 1.33^a	Microcapsules prepared in chitosan 0.3% (w/v)	6.89 ±0.87^a

Samples in variation of pH prepared in 1% chitosan concentration and 60 min stirring time; samples in variation of stirring time prepared in pH 4 and 1% chitosan concentration; and samples in variation of chitosan concentration prepared in pH 4 and 90 min stirring time. Different notations indicate significant differences between condition using the one-way ANOVA test with a level of confidence α = 5%.