September 27, 2010.

First of all we optimize the protocol based on the amount of sample and other materials that we had for work.

-We prepared stocks of:

CTAB  100ml and EDTA  500ml

-Computations for use 50ml bottles for the Freeze and Thaw:

	Original	Modified	Total (min)
bottle	250ml	50ml
Soil	50g	15g	90g
Z buffer	75ml	22.5ml	135ml
SDS	9ml	2.7ml	16.2ml
GITC	4.5ml	1.35ml	8.1

·         The intention is to extract DNA from soil using three 50ml bottles with 15g of soil in each one.

We will have:

6 bottles=90g of soil

September 28, 2010.

-We prepared stocks of:

NaCl (5M)

Sodium Phosphate solution

Tris HCl (1M)

Z Buffer

(100ml sterile Tris, 50ml sterile Sodium Phosphate Solution, 200ml sterile EDTA, 300ml sterile NaCl, 100ml CTAB 10%, 250ml Water dH₂O)

SDS 20 %

                We substitute the Lauryl with Sodium dodecyl sulfate