Table 1. Calculated values for crystallinity and birefringence.

Sample	Crystallinity (%)	Birefringence
B. mori Jp	33.7	0.045
B. mori Cn	30.2	0.069
B. mori In	30.5	0.043
B. mori Th	34.3	0.037
A. pernyi Jp	26.4	0.014
A. pernyi Cn	30.9	0.007
A. yamamai	32.5	0.016
A. assama	34.7	0.02
S. c. pryeri	31.1	0.032
S. c. ricini Jp	31.3	0.026
S. c. ricini In	25.8	0.033
A. aliena	25.7	0.02
R. fugax	28.7	0.009
S. jonasii	30.3	0.008