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. 2015 Mar 4;45(4):1493–1501. doi: 10.1590/s1517-83822014000400046

Table 2.

Experimental conditions for Box-Behenken design and average response for particle size.

Trial X1a X2 X3 average diameter (nm)
1 + + 0 142
2 + − 0 169
3 − 0 203
4 − − 0 102
5 + 0 + 53
6 + 0 − 131
7 − 0 198
8 − 0 − 149
9 0 + 203
10 0 − 211
11 0 − + 195
12 0 − − 117
13 0 0 0 104
14 0 0 0 103
15 0 0 0 102
a

X1, X2 and X3 refer to pH of medium, concentration of AuCl4 (mM) and temperature of shaker incubator (°C), respectively.