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

Table 4. Results of regression analysis and corresponding t and p-value of full second-order polynomial model for optimization of exopolysaccharides production of Rhizobium sp.


Factor

Regression coefficient

Standard deviation

t-statistic

p-value

β0

-0.361612

0.053958

-6.70172

0.000054

β1 (L )

1.147835

0.151855

7.55876

0.000019

β11 (Q)

-0.714687

0.100544

-7.10821

0.000033

β2 (L)

-0.081844

0.015520

-5.27338

0.000361

β3 (L)

-0.000081

0.000027

-2.96353

0.014202

β1 (L) x β2(L)

0.205141

0.017367

11.81202

0.000000

β1 (L) x β3 (L)

0.000153

0.000032

4.80296

0.000720

β2 (L) x β3 (L)

0.000052

0.000014

3.58331

0.004984


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

Supported by UNESCO / MIRCEN network