Optimal Immobilization of β-Galactosidase onto κ-Carrageenan Gel Beads Using Response Surface Methodology and Its Applications

Table 1

Independent variables and the concentration levels studied in CCD.

Independent variables			Range of levels
	−∞	−1	0	+1	+∞
Time (𝑋1)	15 min	1	8	16	24
Units (𝑋2)	1	5	10	20	40