Polygonatum sibiricum primary pulp processing technology

Abstract

The invention belongs to the technical field of rhizoma polygonati deep processing, and particularly relates to a rhizoma polygonati primary pulp processing technology which comprises the following steps: (1) soaking: soaking dried rhizoma polygonati slices in water for 25-35 minutes to obtain soaked rhizoma polygonati slices; (2) boiling the rhizoma polygonati slices: taking the soaked rhizoma polygonati slices and fresh tremella, adding water, boiling, keeping the boiling state for a certain time, stopping fire, and naturally cooling to obtain a mixed solution; and (3) sterilizing: filtering the mixed solution, canning, and pasteurizing to obtain the polygonatum sibiricum primary pulp. The polygonatum sibiricum primary pulp prepared by the process disclosed by the invention is harmonious and soft in taste, excellent in storage property and relatively good in DPPH free radical scavenging capability.

Description

Technical Field

[0001] The invention belongs to the technical field of polygonatum deep processing, and in particular relates to a processing technology for polygonatum raw pulp. Background Art

[0002] Polygonatum sibiricum, a Chinese medicine name. It is the dried rhizome of Polygonatum kingianum Coll.et Hemsl., Polygonatum sibiricum Red. or Polygonatum cyrtonema Hua, a plant of the Liliaceae family. According to different shapes, it is commonly known as "big Polygonatum", "Chicken Head Polygonatum", and "Ginger Shaped Polygonatum". It has the effects of replenishing qi and nourishing yin, strengthening the spleen, moistening the lungs, and benefiting the kidneys. It is commonly used for spleen and stomach qi deficiency, fatigue, insufficient stomach yin, dry mouth and less food, lung deficiency and dry cough, cough and hemoptysis due to fatigue, insufficient essence and blood, soreness of waist and knees, premature graying of hair, and internal heat and thirst. In the prior art, Polygonatum sibiricum is used as a raw material to prepare Polygonatum sibiricum pulp. For example, the Chinese invention patent with application number CN202110861723.0 discloses a Polygonatum sibiricum pulp and a preparation method thereof, and its raw material components are as follows: 60-80 parts of Polygonatum slurry and 10-20 parts of Lycium barbarum slurry by weight. The raw material of polygonatum sibiricum is mainly polygonatum slurry, and then supplemented with wolfberry slurry, without any additives, and has a good effect on resisting the symptoms of senile weakness, liver and kidney deficiency, exhaustion, gray hair, tinnitus and deafness, soreness of waist and knees, etc. in the elderly; at the same time, the preparation method reduces the activity of enzymes by low temperature after fresh polygonatum sibiricum and wolfberry are separated from the mother body, and at the same time, the nutritional components of polygonatum sibiricum and wolfberry are fully dissolved in the raw material by high-speed wall breaking technology, retaining the original flavor. Although the prepared raw material of polygonatum sibiricum is uniform and stable, from the perspective of its preparation method, polygonatum sibiricum and wolfberry are both squeezed raw at low temperature, which cannot eliminate the numbness of the tongue of polygonatum sibiricum, and its storage performance is not clear.

[0003] Therefore, it is very necessary to research and develop a processing technology for a raw polygonatum sibiricum with a harmonious taste and good storage resistance. Summary of the invention

[0004] The present invention aims to solve the above technical problems and provides a processing technology for polygonatum sibiricum pulp. The polygonatum sibiricum pulp prepared by the process has a harmonious and soft taste, excellent storage properties and good DPPH free radical scavenging ability.

[0005] The technical solution of the present invention is:

[0006] The processing technology of polygonatum sibiricum pulp comprises the following steps:

[0007] (1) Soaking: taking dried polygonatum slices and soaking them in water for 25-35 minutes to obtain soaked polygonatum slices;

[0008] (2) Boiling the polygonatum slices: adding water to the soaked polygonatum slices and fresh white fungus to boil, keeping the boiling state for a certain period of time, stopping the fire and cooling naturally to obtain a mixed solution;

[0009] (3) Sterilization: The mixed solution is filtered, canned, and pasteurized to obtain the polygonatum sibiricum puree.

[0010] In order to obtain a polygonatum puree with a good overall taste, preferably, in the step (2) of the present invention, the weight ratio of the polygonatum slices and fresh tremella after soaking is 10:5-7; the material-liquid ratio of the total weight of the polygonatum slices and fresh tremella after soaking to water is 1:5-10. At the same time, the boiling time needs to be well controlled. Preferably, after boiling, the boiling state is maintained for 40-50 minutes. If the boiling time is too long, the polygonatum puree will have a numb feeling on the tongue.

[0011] In actual experiments, as the material-liquid ratio increases, the aroma of polygonatum is the strongest, the taste is the best, and the taste is also high in sweetness. However, when the material-liquid ratio exceeds 1:5, the polygonatum slurry begins to have a numbing taste. When the material-liquid ratio of white fungus and water is lower than 1:5, the white fungus liquid is too thin. When it is mixed with polygonatum later, the taste is not harmonious. In addition, if polygonatum and white fungus are boiled separately and then mixed, the mixing effect of the ingredients of the two is not good, and subsequent storage is prone to stratification. Therefore, in step (2), dried light bamboo leaves are also added. In order to balance the taste of the beverage, light bamboo leaves should not be added too much. Preferably, the amount of light bamboo leaves added in the present invention is 5-10% of the weight of the dried polygonatum slices. The added light bamboo leaves can eliminate the numbing taste that begins to appear in the polygonatum slurry when the material-liquid ratio exceeds 1:5. In addition, the added light bamboo leaves also have a certain antioxidant effect, which prolongs the storage period of the polygonatum slurry in the later stage.

[0012] After the polygonatum and tremella are mixed and cooked, there will be a little sweet and greasy feeling, and astringency. In order to balance the taste, preferably, in the step (3) of the present invention, 3-6% of mangosteen liquid by weight of the polygonatum slurry is also added. However, the added mangosteen liquid needs to be specially treated before it can be added. Preferably, the preparation method of mangosteen liquid of the present invention is: peel and seed the mangosteen, and treat it with high-pressure micro jet. The high-pressure micro jet conditions are: 30-40MPa, 10-20min, centrifugal separation, and supernatant liquid is taken, which is mangosteen liquid. After the specially treated mangosteen liquid is added to the mixed liquid, it forms a stable system with the mixed liquid. In particular, after the special treatment, the pectin in the mangosteen liquid will refine the components into extremely small molecules, and the colloidal particles in the mixed liquid system will fuse to form a stable micro-network, maintaining the stability and uniformity of the system. In addition, the system contains antioxidant components, which can further solidify these network structures and extend the storage period of the mixture.

[0013] Due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0014] 1. The raw polygonatum sibiricum paste prepared by the method of the present invention has a harmonious and soft taste, excellent storage properties, and good DPPH free radical scavenging ability.

[0015] 2. In the method of the present invention, polygonatum and tremella are used as main raw materials, and light bamboo leaves and mangosteen liquid are used as auxiliary materials. The prepared polygonatum pulp not only has a harmonious taste, good flavor, and no tongue numbness, but also has stable storage performance and is not easy to stratify or precipitate during storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The fresh polygonatum sibiricum was washed in Example 1 of the present invention.

[0017] Figure 2 The fresh polygonatum slices in Example 1 of the present invention.

[0018] Figure 3 The present invention is the dried polygonatum slices in Example 1.

[0019] Figure 4 This is a picture of the Polygonatum sibiricum puree prepared in Example 1 of the present invention. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] Example 1

[0022] The processing technology of polygonatum sibiricum pulp comprises the following steps:

[0023] (1) Soaking: Use fresh Polygonatum sibiricum (see Figure 1 ) rhizomes, remove fibrous roots and impurities, clean and slice (see Figure 2 ) and then dried at 60°C to constant weight to obtain dried Polygonatum sibiricum slices (see Figure 3 ), then taking the dried polygonatum slices and soaking them in water for 30 minutes to obtain the soaked polygonatum slices;

[0024] (2) Cooking the polygonatum slices: taking the soaked polygonatum slices and fresh tremella in a weight ratio of 10:6, and adding 8% of the weight of the dried polygonatum slices with lophatherum gracile, and boiling water in a material-liquid ratio of 1:8 based on the total weight of the soaked polygonatum slices and fresh tremella to water, and keeping the boiling state for 45 minutes, stopping the fire and cooling naturally to obtain a mixed solution;

[0025] (3) Sterilization: The mixed solution is filtered, and 7% of mangosteen liquid by weight of polygonatum sibiricum pulp is added, mixed evenly, canned, and pasteurized to obtain polygonatum sibiricum pulp. Figure 4 shown.

[0026] The method for preparing the mangosteen liquid is as follows: peel and seed mangosteen, treat it with high-pressure microfluidization at 35 MPa for 15 minutes, centrifuge it at a speed of 5000 r / min for 15 minutes, and take the supernatant, which is the mangosteen liquid.

[0027] Example 2

[0028] The processing technology of polygonatum sibiricum pulp comprises the following steps:

[0029] (1) Soaking: Select fresh rhizomes of polygonatum, remove fibrous roots and impurities, wash and slice, dry at 60°C to constant weight to obtain dried polygonatum slices, and then soak the dried polygonatum slices in water for 25 minutes to obtain soaked polygonatum slices;

[0030] (2) Cooking the polygonatum slices: taking the soaked polygonatum slices and fresh tremella in a weight ratio of 10:5, and adding 5% of the weight of the dried polygonatum slices with lophatherum gracile, and boiling water in a material-liquid ratio of 1:5 based on the total weight of the soaked polygonatum slices and fresh tremella to water, and keeping the boiling state for 40 minutes, stopping the fire and cooling naturally to obtain a mixed solution;

[0031] (3) Sterilization: The mixed solution is filtered, and 3% of mangosteen liquid by weight of polygonatum sibiricum pulp is added, mixed evenly, canned, and pasteurized to obtain polygonatum sibiricum pulp.

[0032] The method for preparing the mangosteen liquid is as follows: peel and seed mangosteen, treat it with high-pressure microfluidization at 30 MPa for 10 minutes, centrifuge it at a speed of 5000 r / min for 15 minutes, and take the supernatant, which is the mangosteen liquid.

[0033] Example 3

[0034] The processing technology of polygonatum sibiricum pulp comprises the following steps:

[0035] (1) Soaking: Select fresh rhizomes of polygonatum, remove fibrous roots and impurities, wash and slice, dry at 60°C to constant weight to obtain dried polygonatum slices, and then soak the dried polygonatum slices in water for 35 minutes to obtain soaked polygonatum slices;

[0036] (2) Cooking the polygonatum slices: taking the soaked polygonatum slices and fresh tremella in a weight ratio of 10:7, and adding 10% of the weight of the dried polygonatum slices with lophatherum gracile, and boiling water in a material-liquid ratio of 1:10, keeping the boiling state for 50 minutes, stopping the fire and cooling naturally, and obtaining a mixed solution;

[0037] (3) Sterilization: The mixed solution is filtered, and 6% of mangosteen liquid by weight of polygonatum sibiricum pulp is added, mixed evenly, canned, and pasteurized to obtain polygonatum sibiricum pulp.

[0038] The method for preparing the mangosteen liquid is as follows: peel and seed mangosteen, treat it with high-pressure microfluidization at 40 MPa for 20 minutes, centrifuge it at 5000 r / min for 15 minutes, and take the supernatant, which is the mangosteen liquid.

[0039] Comparative Example 1

[0040] The difference from Example 1 is that no light bamboo leaves are added, and the rest is the same as Example 1.

[0041] Comparative Example 2

[0042] The difference from Example 1 is that no mangosteen liquid is added, and the rest is the same as Example 1.

[0043] Test Example 1: Sensory evaluation of the polygonatum sibiricum puree of the present invention

[0044] 10 food professionals were randomly selected to form a sensory evaluation panel to conduct sensory evaluation on the product. Each formula was scored according to the scoring criteria, with a total score of 100 points. The average of the panel's sensory scores was taken. Figure 1 The sensory evaluation scores of the polygonatum sibiricum puree of Examples 1-3 and Comparative Examples 1-3 after storage at 7°C for 6 months are shown in Table 2.

[0045] Table 1 Comprehensive standard table of Polygonatum sibiricum puree

[0046]

[0047]

[0048] Table 2 Sensory evaluation scores of each group of Polygonatum sibiricum puree

[0049] Group Color Organizational form Flavor Taste Total score Example 1 18.5 18.2 26.4 26.4 89.5 Example 2 18.1 17.9 25.7 27.1 88.8 Example 3 17.9 16.5 25.6 26.6 86.6 Comparative Example 1 10.2 9.5 15.4 13.7 48.8 Comparative Example 2 13.6 11.8 19.8 17.6 62.8

[0050] It can be seen from Table 2 that the method of the present invention can prepare polygonatum sibiricum pulp with good storage property and high sensory evaluation.

[0051] Test Example 2: DPPH free radical scavenging ability of the polygonatum sibiricum puree of the present invention

[0052] Experimental method: The in vitro DPPH free radical scavenging ability was used to evaluate the antioxidant activity of Polygonatum sibiricum puree, referring to the method of Tang Yayuan et al. (Tang Yayuan, Wang Xuefeng, Wei Zhen, et al. Antioxidant activity and stability of polysaccharide from banana flower [J]. Science and Technology of Food Industry, 2024, 45 (7): 100-107.). 2 mL of Polygonatum sibiricum puree was thoroughly mixed with 0.2 mmol / L DPPH free radical solution, reacted in the dark for 30 minutes, and the absorbance was measured at 517 nm. The DPPH free radical scavenging rate was calculated by formula (1).

[0053]

[0054] Wherein: A0 is the absorbance value of anhydrous ethanol; A1 is the absorbance value after the reaction of anhydrous ethanol and the sample solution; A2 is the absorbance value after the reaction of DPPH free radical solution and the sample solution.

[0055] (2) See 2 for the results.

[0056] Table 2 DPPH free radical scavenging ability of each group of Polygonatum sibiricum puree

[0057]

[0058] By the method of the present invention, combined with the synergistic effect of various raw materials, the DPPH radical scavenging ability of the polygonatum sibiricum pulp can be improved, especially the DPPH radical scavenging activity during the storage period can be guaranteed. The antioxidant activity of the bamboo leaves and the polygonatum sibiricum raw material can work together to ensure the DPPH radical scavenging ability of the polygonatum sibiricum pulp during the storage period, and the addition of mangosteen liquid maintains the storage stability of the system. To a certain extent, the above-mentioned activity of the DPPH radical scavenging ability of the polygonatum sibiricum pulp is guaranteed, and the DPPH radical scavenging ability of the polygonatum sibiricum pulp is indirectly improved.

[0059] The above description is a detailed description of the preferred feasible embodiments of the present invention, but the embodiments are not intended to limit the scope of the patent application of the present invention. All equivalent changes or modified changes completed under the technical spirit suggested by the present invention should fall within the patent scope covered by the present invention.

Claims

1. A process for processing polygonatum sibiricum pulp, characterized in that: The following steps are involved: (1) Soaking: taking dried polygonatum slices and soaking them in water for 25-35 minutes to obtain soaked polygonatum slices; (2) Boiling the polygonatum slices: adding water to the soaked polygonatum slices and fresh white fungus to boil, keeping the boiling state for a certain period of time, stopping the fire and cooling naturally to obtain a mixed solution; (3) Sterilization: The mixed solution is filtered, canned, and pasteurized to obtain the polygonatum sibiricum puree.

2. The process for processing polygonatum sibiricum pulp as claimed in claim 1, characterized in that: In the step (2), the weight ratio of the soaked polygonatum slices to fresh tremella is 10:5-7.

3. The process for processing polygonatum sibiricum pulp as claimed in claim 1, characterized in that: In the step (2), the total weight of the soaked polygonatum slices and fresh tremella and the liquid ratio of water is 1:5-10.

4. The process for processing polygonatum sibiricum pulp as claimed in claim 1, characterized in that: In the step (2), after boiling, the boiling state is maintained for 40-50 minutes.

5. The process for processing polygonatum sibiricum pulp as claimed in claim 1, characterized in that: In the step (2), dried bamboo leaves are also added.

6. The process for processing polygonatum sibiricum pulp as claimed in claim 5, characterized in that: The amount of the lophatherum gracile added is 5-10% of the weight of the dried polygonatum slices.

7. The process for processing polygonatum sibiricum pulp as claimed in claim 1, characterized in that: In the step (3), 3-6% of mangosteen liquid by weight of polygonatum slurry is also added.

8. The process for processing polygonatum sibiricum pulp as claimed in claim 7, characterized in that: The method for preparing mangosteen liquid comprises the following steps: peeling and seeding mangosteen, subjecting the mixture to high-pressure microfluidization treatment, centrifuging and separating, and obtaining the supernatant, which is the mangosteen liquid.

9. The process for processing polygonatum sibiricum pulp as claimed in claim 8, characterized in that: The high-pressure microfluidization conditions are: 30-40 MPa, 10-20 min.

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