Electronic Journal of Biotechnology ISSN: 0717-3458
  © 2006 by Universidad Católica de Valparaíso -- Chile
Vol. 9 No. 4, Issue of July 15, 2006
 

Table 5. Analysis of variance (ANOVA) for the fitted quadratic polynomial model for optimization of exopolysaccharides production of Rhizobium sp.


Factor
Sum of squares
(SS)
Degrees of Freedom
(DF)
Mean Square
(MS)
F-value
p-value
X1 (L)
0.093711
1
0.093711
1027.092
0.000000
X1(Q )
0.004610
1
0.004610
50.527
0.000033
X2 (L)
0.046428
1
0.046428
508.865
0.000000
X3(L)
0.007538
1
0.007538
82.620
0.000004
X1 (L) x X2 (L)
0.012730
1
0.012730
139.524
0.00000
X1 (L) x X3 (L)
0.002105
1
0.002105
23.068
0.000720
X2(L) x X3 (L)
0.001172
1
0.001172
12.840
0.004984
Lack of fit
0.001127
1
0.001127
12.353
0.005587
Pure error
10
0.000091
 
 
Total sum of squares
0.170333
18
 
 
 

Legend: L: linear; Q: quadratic; X1: Calcium Carbonate Concentration; X2: Aeration; X3: Agitation.

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