Processing method of low-fat high-protein germinated peanut powder

Abstract

The invention provides a processing method of low-fat high-protein peanut sprout powder, and relates to the technical field of food processing. According to the processing method provided by the invention, the activity of lipase in peanuts is adjusted by exogenously adding CaCl2 and chitosan oligosaccharide and cooperating with low-temperature stress, so that the effects of promoting peanut germination and soluble protein generation and reducing the grease content are achieved, and the low-fat high-protein germinated peanut powder is prepared.

Description

Technical Field

[0001] The invention relates to the technical field of food processing, and in particular to a processing method of low-fat and high-protein sprouted peanut powder. Background Art

[0002] Peanuts are rich in nutrition and delicious. As one of the world's major oil crops, peanuts are rich in lipids, mainly composed of triglycerides. They are a good source of high-quality plant protein and occupy an important position in daily diet. At present, with people's pursuit of healthy diet, reducing fat intake has become a more common choice in daily life, but peanut products still contain a lot of fat.

[0003] Studies have shown that the triglyceride accumulated in peanut oil is between 20% and 50% of the dry weight of peanuts. During the germination of seeds, triglycerides are degraded or hydrolyzed to provide energy, which is necessary for the biosynthesis of sugars, amino acids (such as aspartic acid, asparagine, glutamic acid and glutamine) and carbon chains, while ensuring seed growth and development. Although the oil content of peanuts has shown a downward trend during germination, a large amount of oil is still retained.

[0004] Therefore, it is urgent to provide a processing method for low-fat and high-protein sprouted peanut powder. Summary of the invention

[0005] The present invention aims to provide a processing method for low-fat and high-protein sprouted peanut powder, wherein the processing method comprises adding CaCl 2 It cooperates with chitosan oligosaccharide to regulate the activity of lipase in peanuts under low temperature stress, promotes peanut germination and soluble protein production and reduces oil content, and prepares low-fat and high-protein sprouted peanut powder.

[0006] In a first aspect, the present invention provides a method for processing low-fat and high-protein peanut sprout powder, comprising the following steps:

[0007] The peanuts are soaked in the mixed solution, germinated at low temperature, dried and crushed to obtain low-fat and high-protein peanut sprout powder.

[0008] Optionally, the peanuts need to be sterilized before use.

[0009] Optionally, the soaking treatment includes soaking at 30°C-50°C for 6h-12h.

[0010] Optionally, the low-temperature germination includes: germination at a humidity of 80%-90% and a temperature of 4°C-15°C for 3d-7d, during which the mixed solution is sprayed every 10h-12h.

[0011] Low temperature treatment can promote the fatty acid synthesis protein pathway in peanuts, supplemented by spraying CaCl 2The mixed solution with chitosan oligosaccharide promotes the production of fatty acids and can obtain peanut sprouts with low fat and high protein.

[0012] Optionally, the mixed solution includes 1.0 g / L-2.0 g / L of CaCl 2 and 0.1g / L-0.5g / L oligochitosan.

[0013] Add exogenous Ca 2+ It can enhance the biological activity of lipase and reduce the oil content; chitosan oligosaccharide can promote seed germination, while increasing the production of soluble protein and the activity of lipase.

[0014] Optionally, after the low-temperature germination treatment, the peanuts need to be rooted and peeled, then dried in an oven at 60° C.-80° C. for 10 h-12 h, and crushed into peanut sprout powder.

[0015] In a second aspect, the present invention provides an application of the above processing method in preparing low-fat and high-protein peanut sprout powder.

[0016] The peanut sprout powder prepared by the processing method provided by the invention reduces the fat content while maintaining a high protein content, which is beneficial to human health. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly introduce the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments.

[0018] Figure 1 This is the determination of the fat and protein content of the peanut sprout powder prepared in Examples 1 to 7 and Comparative Examples 1 to 7 in the performance test of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described through the following embodiments in conjunction with the accompanying drawings. However, the following embodiments are illustrative and are only used to specifically describe the present invention rather than to limit the present invention.

[0020] The embodiment of the present invention provides a method for processing low-fat and high-protein peanut sprout powder, comprising the following steps:

[0021] S1. Soaking peanuts in the mixed solution;

[0022] S2. The soaked peanuts are germinated at low temperature, and after germination, they are dried and crushed to obtain low-fat and high-protein peanut sprout powder.

[0023] In some embodiments, when executing step S1, the peanuts need to be sterilized before use.

[0024] In some embodiments, when performing step S1, the mixed solution includes 1.0 g / L-2.0 g / L of CaCl 2 and 0.1g / L-0.5g / L oligochitosan.

[0025] In some embodiments, when performing step S1, the soaking treatment includes soaking at 30°C-50°C for 6h-12h.

[0026] In fact, when executing step S2, the following sub-steps are included:

[0027] S2.1, subjecting the soaked peanuts to low-temperature germination treatment, spraying the mixed solution during germination to keep the surface of the peanuts moist;

[0028] S2.2. After the peanuts are germinated, the roots and skins are removed, and the peanuts are dried and crushed to obtain low-fat and high-protein peanut sprout powder.

[0029] In some embodiments, when performing step S2.1, the low-temperature germination treatment includes: germination for 3d-7d at a humidity of 80%-90% and a temperature of 4°C-15°C.

[0030] In some embodiments, when executing step S2.1, the time interval for spraying the mixed solution is 10h-12h.

[0031] In some embodiments, when performing step S2.2, the drying comprises drying in an oven at 60° C.-80° C. for 10 h-12 h.

[0032] The present invention also provides an application of the processing method in preparing low-fat and high-protein peanut sprout powder.

[0033] Example 1

[0034] Embodiment 1 of the present invention provides a method for processing low-fat and high-protein peanut sprout powder, wherein the selected peanut variety is Baisha 1016, and the weight of the whole peanut is 150 grams, and the method comprises the following steps:

[0035] S1. Select 100g of full-fruited, pest-free peanuts, soak them in 150mL 1.0% sodium hypochlorite for 3min, rinse them twice with water, and then soak the peanuts in a solution containing 1.2g / L CaCl 2 and 0.1 g / L chitosan oligosaccharide mixed solution for 10 h;

[0036] S2.1. Place the soaked peanuts in an environment with a humidity of 85% and a temperature of 6°C for 7 days for germination. Spray the peanuts with 1.2 g / L CaCl every 12 hours. 2 and a mixed solution of 0.1 g / L chitosan oligosaccharide to keep the surface moist;

[0037] S2.2. After the peanuts germinate, remove the roots and skin, dry them in an oven at 60°C for 12 hours, and grind them into low-fat and high-protein peanut sprout powder.

[0038] Example 2

[0039] Example 2 of the present invention provides a method for processing low-fat and high-protein peanut sprout powder, which is different from Example 1 in that:

[0040] The peanut variety selected was Fuyu Four-grain Red, with a hundred-fruit weight of 120 grams;

[0041] The mixed solution in step S1 and step S2.1 contains 1.0 g / L CaCl 2 and 0.2 g / L chitosan oligosaccharide;

[0042] The temperature of the germination treatment in step S2.1 is 8°C.

[0043] Example 3

[0044] Embodiment 3 of the present invention provides a method for processing low-fat and high-protein peanut sprout powder, which is different from Embodiment 1 in that:

[0045] The peanut variety selected is Haihua No. 1, and the weight of 100 peanuts is 200 grams;

[0046] The CaCl in the mixed solution in step S1 and step S2.1 2 The concentration is 1.6g / L;

[0047] The soaking time of peanuts in step S1 is 8 hours;

[0048] In step S2.1, the germination treatment was performed at a temperature of 8°C, a humidity of 87%, and a time of 6 days;

[0049] The time interval for spraying the mixed solution in step S2.1 is 11 hours.

[0050] Example 4

[0051] Example 4 of the present invention provides a method for processing low-fat and high-protein peanut sprout powder, which is different from Example 1 in that:

[0052] The peanut variety selected is Luhua No. 9, with a 100-fruit weight of 223 grams;

[0053] The mixed solution in step S1 and step S2.1 contains 1.4 g / L CaCl 2 and 0.2 g / L chitosan oligosaccharide;

[0054] The soaking time of peanuts in step S1 is 8 hours;

[0055] The humidity of the germination treatment in step S2.1 is 90°C and the time is 6 days;

[0056] The time interval for spraying the mixed solution in step S2.1 is 11 hours.

[0057] Example 5

[0058] Example 5 of the present invention provides a method for processing low-fat and high-protein peanut sprout powder, which is different from Example 1 in that:

[0059] The peanut variety selected is Luhua No. 11, and the weight of 100 peanuts is 230 grams;

[0060] The mixed solution in step S1 and step S2.1 contains 1.8 g / L CaCl 2 and 0.2 g / L chitosan oligosaccharide;

[0061] The peanut soaking time in step S1 is 8 hours;

[0062] The temperature of the germination treatment in step S2.1 is 10°C and the time is 5 days;

[0063] The time interval for spraying the mixed solution in step S2.1 is 10 hours.

[0064] Example 6

[0065] Example 6 of the present invention provides a method for processing low-fat and high-protein peanut sprout powder, which is different from Example 1 in that:

[0066] The peanut variety selected is Fenghua No. 1, with a 100-fruit weight of 240 grams;

[0067] The mixed solution in step S1 and step S2.1 contains 1.8 g / L CaCl 2 and 0.3 g / L chitosan oligosaccharide;

[0068] The peanut soaking time in step S1 is 7 hours;

[0069] The temperature of the germination treatment in step S2.1 is 8°C and the time is 5 days;

[0070] The time interval for spraying the mixed solution in step S2.1 is 10 hours.

[0071] Example 7

[0072] Example 7 of the present invention provides a method for processing low-fat and high-protein peanut sprout powder, which is different from Example 1 in that:

[0073] The peanut variety selected is Heifeng No. 1, and the weight of 100 fruits is 250 grams;

[0074] The mixed solution in step S1 and step S2.1 contains 2.0 g / L CaCl 2and 0.3 g / L chitosan oligosaccharide;

[0075] The peanuts are soaked for 6 hours in step S1;

[0076] The temperature of the germination treatment in step S2.1 is 8°C and the time is 5 days;

[0077] The time interval for spraying the mixed solution in step S2.1 is 10 hours.

[0078] Comparative Example 1

[0079] Comparative Example 1 of the present invention provides a processing method for ordinary peanut sprout powder, which is different from Example 1 in that:

[0080] In step S1, the sterilized peanuts are soaked in water;

[0081] The temperature of the germination treatment in step S2.1 is room temperature 25°C;

[0082] The solution sprayed in step S2.1 is distilled water.

[0083] Comparative Example 2

[0084] Comparative Example 2 of the present invention provides a processing method for ordinary peanut sprout powder, which is different from Example 2 in that:

[0085] In step S1, the sterilized peanuts are soaked in water;

[0086] The temperature of the germination treatment in step S2.1 is room temperature 25°C;

[0087] The solution sprayed in step S2.1 is distilled water.

[0088] Comparative Example 3

[0089] Comparative Example 3 of the present invention provides a processing method for ordinary peanut sprout powder, which is different from Example 3 in that:

[0090] In step S1, the sterilized peanuts are soaked in water;

[0091] The temperature of the germination treatment in step S2.1 is room temperature 25°C;

[0092] The solution sprayed in step S2.1 is distilled water.

[0093] Comparative Example 4

[0094] Comparative Example 4 of the present invention provides a processing method for ordinary peanut sprout powder, which is different from Example 4 in that:

[0095] In step S1, the sterilized peanuts are soaked in water;

[0096] The temperature of the germination treatment in step S2.1 is room temperature 25°C;

[0097] The solution sprayed in step S2.1 is distilled water.

[0098] Comparative Example 5

[0099] Comparative Example 5 of the present invention provides a processing method for ordinary peanut sprout powder, which is different from Example 5 in that:

[0100] In step S1, the sterilized peanuts are soaked in water;

[0101] The temperature of the germination treatment in step S2.1 is room temperature 25°C;

[0102] The solution sprayed in step S2.1 is distilled water.

[0103] Comparative Example 6

[0104] Comparative Example 6 of the present invention provides a processing method for ordinary peanut sprout powder, which is different from Example 6 in that:

[0105] In step S1, the sterilized peanuts are soaked in water;

[0106] The temperature of the germination treatment in step S2.1 is room temperature 25°C;

[0107] The solution sprayed in step S2.1 is distilled water.

[0108] Comparative Example 7

[0109] Comparative Example 7 of the present invention provides a processing method for ordinary peanut sprout powder, which is different from Example 7 in that:

[0110] In step S1, the sterilized peanuts are soaked in water;

[0111] The temperature of the germination treatment in step S2.1 is room temperature 25°C;

[0112] The solution sprayed in step S2.1 is distilled water.

[0113] Performance Testing

[0114] The protein content and fat content of the peanut sprout powder prepared in Examples 1 to 7 and Comparative Examples 1 to 7 were determined by Kjeldahl nitrogen determination method (GB 5009.5-2016 National Food Safety Standard Determination of Protein in Food Method 1) and Soxhlet extraction method (GB 5009.6-2016 National Food Safety Standard Determination of Fat in Food). The results are as follows: Figure 1As shown, the results show that the low-fat and high-protein peanut sprout powder obtained by processing different varieties of peanuts with the method provided by the present invention has a fat content reduced by about 40% and a protein content increased by about 50% compared with ordinary peanut sprout powder.

[0115] Although the embodiments of the present invention are described in detail above, it is obvious to those skilled in the art that various modifications and variations can be made to these embodiments. However, it should be understood that such modifications and variations are within the scope and spirit of the present invention as described in the claims. Moreover, the present invention described herein may have other embodiments and may be implemented or realized in a variety of ways.

Claims

1. A method for processing low-fat and high-protein peanut sprout powder, characterized in that: The following steps are involved: The peanuts are soaked in the mixed solution, germinated at low temperature, dried and crushed to obtain low-fat and high-protein peanut sprout powder.

2. The processing method according to claim 1, characterized in that: The soaking treatment includes soaking at 30° C.-50° C. for 6 h-12 h.

3. The processing method according to claim 1, characterized in that: The low-temperature germination includes: germination for 3-7 days at a humidity of 80%-90% and a temperature of 4° C.-15° C., during which the mixed solution is sprayed every 10 hours-12 hours.

4. The processing method according to claim 1 or 3, characterized in that: The mixed solution comprises 1.0 g / L-2.0 g / L of CaCl2 and 0.1 g / L-0.5 g / L of oligochitosan.

5. The processing method according to claim 1, characterized in that: After low-temperature germination, the peanuts need to be rooted and peeled, dried in an oven at 60°C-80°C for 10h-12h, and then crushed into peanut sprout powder.

6. Use of the processing method according to any one of claims 1 to 5 in preparing low-fat and high-protein peanut sprout powder.

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