Preparation of feather meal (feather meal has been in favor of swine Company Limited) take a sample of the selected hair chicken meal particle size of the solid with the sieve size 150 micron. The feather meal for 0.5 grams. Put in phosphate buffer solution 20 mm acidity 7.2 volume 10 ml overnight. Then the enzyme hydrolysis 3 type. Including Elle Calais (Alcalase),Liquid volumetric enzyme (flavourzyme) and the new threshold (Neutrase) using the enzyme concentration,, 0 1 2.5 5 percent and the curing temperature 50 C acidity 7 for new Terra สและ liquid volumetric enzyme and pH 8 for. Elle Calais for 4 hours. Stop the reaction by providing heat temperature, 90For 10 minutes by experiment completely randomized design (CRD) Experiment 3 replications. Analyze data by using the computer program SPSS compare mean by using Duncan s new multiple range. ' Test configure P < 0.05 is considered to have significance. The peptide by enzyme hydrolysis to centrifugation (centrifuge) speed, around the 12000 rpm for 10 minutes to separate spinning and keep only the clear. The peptide by enzyme hydrolysis to make pure. By the size of the protein with technique of ultrafiltration (ultrafiltration) with the size of the membrane filter 650 3,,,, and 000 5 000 10 000 dalton, to get the size of the protein, less than 650 650-3 000 3,,,,,,, 000-5 000 5 000-10 000 and more than 10,,000 dalton. Then calculate the quantity of protein by way of Bradford (28) using Bo wine, bovine serum albumin (bovine serum albumin) is a protein solution, standard. And measure the absorbance at 595 nm.
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