Method for preparing polypeptide with high antioxidant activity through enzymolysis of internal organs of squids

A squid viscera, oxidation activity technology, applied in the direction of fermentation, etc., can solve the problems of underutilization of biological activity, waste of protein resources, low added value, etc., and achieve the effect of easy control of the reaction process, short reaction time, and increased added value

Inactive Publication Date: 2013-12-18
ZHEJIANG OCEAN UNIV
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  • Abstract
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AI Technical Summary

Problems solved by technology

However, its intrinsic biological activity is not fully utilized, resulting in a large waste of protein resources and low added value

Method used

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  • Method for preparing polypeptide with high antioxidant activity through enzymolysis of internal organs of squids
  • Method for preparing polypeptide with high antioxidant activity through enzymolysis of internal organs of squids
  • Method for preparing polypeptide with high antioxidant activity through enzymolysis of internal organs of squids

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Experimental program
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Embodiment

[0024] 1 Materials and instruments

[0025] 1.1 Materials

[0026] The viscera of fresh female squid were purchased from the local farmer's market in Zhoushan, and the ovary glands and ovaries were collected for experiments. Trypsin was purchased from Beijing Asia-Pacific Hengxin Biotechnology Co., Ltd.; phenanthroline, DPPH, and potassium ferricyanide were purchased from Shanghai Jingchun Reagent Co., Ltd.; other reagents were of analytical grade and purchased from Sinopharm Chemical Reagent Co., Ltd.

[0027] 1.2 Main Instruments

[0028] BSA124S electronic balance (German Sartorius AG company); high-speed tissue masher (Shanghai Bilang company); CF16RXII high-speed refrigerated centrifuge (Japan HITACHI company); SSW microcomputer electric heating constant temperature bath (Shanghai Boxun Industrial Co., Ltd. Medical Equipment Factory ); UV1600PC ultraviolet spectrophotometer (Shanghai Mapoda Co., Ltd.); MSC300 ultrafiltration cup and ultrafiltration membrane (Shanghai Mo...

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PUM

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Abstract

The invention provides a method for preparing polypeptide with high antioxidant activity through enzymolysis of internal organs of squids. The method comprises the following steps: mashing the internal organ tissues of the squids, adding water to homogenize according to a material-liquid ratio of 1:(3-5) (m / v), adjusting the pH (potential of Hydrogen) value to 7.0-8.0, adding trypsin to hydrolyze for 5-7 hours at the temperature of 35-45 DEG C to obtain enzymatic hydrolysate; deactivating enzyme; centrifuging; taking supernatant; intercepting the polypeptide with molecular weight of being less than or equal to 5KD through an ultrafiltration cup; performing freeze drying to obtain the polypeptide with high antioxidant activity. According to the method, the waste for squid processing can be effectively utilized, the added value is improved, the economic benefit is increased, the enzymolysis reaction condition is mild, the reaction time is short, the efficiency is high, and the reaction process is easy to control; by the method, the natural polypeptide with excellent antioxidant activity can be obtained, the polypeptide can be used in place of artificially synthesized antioxidant, and the toxic or side effect is low.

Description

technical field [0001] The invention relates to the technical field of extraction of marine biological active substances, in particular to a method for preparing polypeptides with high antioxidant activity by enzymatic hydrolysis of cuttlefish viscera. Background technique [0002] Squid, commonly known as cuttlefish, belongs to the phylum Molluscs, Cephalopoda, and Squididae. It is one of the four major economic fishes in my country. According to statistics, the annual catch in 2009 alone has exceeded 200,000 tons (Chang Kangmei, Wu Changwen. Research progress on value-added development and utilization of needle squid [J]. China Fisheries, 2008, 30(2): 55-58). Squid has high edible and medicinal value, and the whole body is a treasure. Many scholars have studied the anti-aging, antibacterial, anti-tumor, and immunity-enhancing effects of squid meat, squid ink, and squid bone. Squid viscera is a waste product of deep processing of squid, which is often processed into squid v...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C12P21/06
Inventor 杨最素叶丛林丁国芳徐律李荣黄芳芳
Owner ZHEJIANG OCEAN UNIV
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