A method for preparing antioxidant peptide from pig skin by enzymatic hydrolysis

Abstract

The invention discloses a method for preparing antioxidant peptide by enzymatic hydrolysis of pig skin, which comprises the following steps: 1) taking pig skin as raw material, cutting off surface oiland fat, and cutting into 1-2cm wide strips, beatening for standby; 2) placing the homogenate of the step 1) in an enzymatic hydrolysis tank for enzymatic hydrolysis defatting; 3) adding 1 volume ofdrinking water into the aqueous phase and the solid phase obtained in the step 2), adjusting the pH to 7.3, and then adding 2% of the pigskin protein rich substance; 3% complex proteinase (flavor proteinase: alkaline proteinase: papain = 1: 3: 2), the temperature is 50 DEG C, the hydrolysis time is 8h, the enzyme is inactivate, and the pigskin antioxidant peptide is obtained by centrifugation, ultrafiltration, concentrate and drying the powder in turn. The invention has the beneficial effects that the antioxidant peptide is prepared from pig skin by the enzymatic hydrolysis method, green environmental protection and high-value utilization of pork processing by-products are realized, the preparation process is simple, and the prepared peptide powder has good antioxidant activity.

Description

technical field [0001] The invention relates to the technical field of preparation of antioxidant peptides, in particular to a method for enzymolyzing pigskin to prepare antioxidant peptides. Background technique [0002] my country is a big pig raising country. With the continuous development of science and technology, the pig industry has also developed rapidly. The output of pork accounts for about 70% of the total meat output in my country. A large number of by-products are produced while producing pork, and pig skin is one of them. One of the most important applications of animal skin is tanning, but due to the poor texture of pig skin itself, pig skin is rarely used in the leather industry at present. In addition, because pig skin has unacceptable peculiar smell, bad taste, Because of low digestibility and inconvenient processing, it is often discarded and rarely used directly, resulting in a large backlog of pigskin, and the nutritional value and function of pigskin ...

AI Technical Summary

Problems solved by technology

One of the most important applications of animal skin is tanning, but due to the poor texture of pig skin itself, pig skin is rarely used in the leather industry at present. In addition, because pig skin has unacceptable peculiar smell, bad taste, Because of low digestibility and inconvenient processing, it is often discarded and rarely used directly, resulting in a large backlog of pigskin, and the nutritional value and function of pigskin have not been fully utilized.