Fresh-keeping method of fresh cistanche, fresh-keeping agent, cistanche product and preparation method

Abstract

The invention relates to a fresh-keeping method and a fresh-keeping agent of fresh cistanche, a cistanche product and a preparation method. The cistanche product comprises the fresh cistanche, a beta-cyclodextrin layer formed on the outer surface of the fresh cistanche, and absorbent paper and a fresh-keeping film which sequentially wrap the outer surface of the fresh cistanche. The water content of the fresh cistanche deserticola is not lower than 70%. The preparation and preservation method comprises the following steps: coating the beta-cyclodextrin on the outer surface of the fresh cistanche to form a coating, then sequentially wrapping the coating with the absorbent paper and the preservative film, and refrigerating at 4-8 DEG C. According to the method, the outer surface of the fresh cistanche is coated with beta-cyclodextrin, sequentially wrapped with the absorbent paper and the preservative film and stored at low temperature, long-term preservation of the fresh cistanche is achieved, the preservation period is one year, the water loss rate is lower than 10%, and the fresh cistanche is dry and comfortable in surface, free of color change and free of mildewing and deterioration.

Description

Technical Field

[0001] This invention relates to fresh Cistanche deserticola, and more particularly to a method for preserving fresh Cistanche deserticola, a preservative, Cistanche deserticola products, and a preparation method thereof. Background Technology

[0002] Cistanche deserticola is an important food and medicinal material, and studies have shown that the content of active ingredients in its fresh form is significantly higher than that in its dried form. However, the loss rate of fresh Cistanche deserticola after harvesting is extremely high, and traditional processing methods for drying it result in a decline in quality. Although modern preservation technologies such as refrigeration and modified atmosphere packaging have been attempted, its shelf life remains limited. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, this application provides a Cistanche deserticola product and its preservation method, aiming to solve the technical problems of short shelf life and difficulty in long-term storage of fresh Cistanche deserticola.

[0004] To achieve the above objectives, the present invention provides a Cistanche deserticola product, which includes fresh Cistanche deserticola, a β-cyclodextrin layer coated on the outer surface of the fresh Cistanche deserticola, and absorbent paper and plastic wrap sequentially wrapped around the β-cyclodextrin layer. The moisture content of the Cistanche deserticola product is not less than 70%.

[0005] As a further improvement, the application process specifically involves first applying a portion of the β-cyclodextrin to the opening portion of the scales of the fresh Cistanche deserticola, and then evenly spreading the remaining β-cyclodextrin onto the absorbent paper.

[0006] As a further improvement, the amount of β-cyclodextrin used is 12-17 g / piece.

[0007] As a further improvement, the absorbent paper is wrapped in 1 to 2 layers, and the plastic wrap is wrapped in 2 to 3 layers.

[0008] As a further improvement, the fresh Cistanche deserticola is freshly harvested Cistanche deserticola or Cistanche tubulosa.

[0009] As a further improvement, the harvesting season for the fresh Cistanche deserticola is April to May or September to October.

[0010] The present invention further provides a method for preparing Cistanche deserticola products, wherein a β-cyclodextrin layer is coated on the outer surface of fresh Cistanche deserticola; absorbent paper and plastic wrap are sequentially wrapped around the β-cyclodextrin layer to obtain the Cistanche deserticola product.

[0011] The present invention further provides a method for preserving Cistanche deserticola, which involves coating the outer surface of fresh Cistanche deserticola with a β-cyclodextrin layer; wrapping the β-cyclodextrin layer with absorbent paper and plastic wrap in sequence to obtain the Cistanche deserticola product; and then refrigerating the Cistanche deserticola product at 4℃~8℃.

[0012] As a further improvement, the refrigeration temperature of the Cistanche deserticola product is 6°C.

[0013] The present invention further provides an application of β-cyclodextrin as a preservative for fresh Cistanche deserticola or Cistanche deserticola products, preferably, the Cistanche deserticola products are prepared according to the method described in claim 7.

[0014] The above-described technical solution of the present invention has the following beneficial effects:

[0015] This invention achieves good preservation of fresh Cistanche deserticola within one year by coating the outer surface of fresh Cistanche deserticola with β-cyclodextrin, then wrapping it with absorbent paper and plastic wrap, and combining it with low-temperature refrigeration. Attached Figure Description

[0016] Figure 1 These are the state diagrams (a) for day 1 and (b) for day 379 of Example 1.

[0017] Figure 2 These are the state diagrams (a) for day 81 and (b) for day 225 of Example 1.

[0018] Figure 3 This is the status diagram for day 81 of Example 2.

[0019] Figure 4 These are the state diagrams for day 81 (a) and day 225 (b) of Example 3.

[0020] Figure 5 These are the state diagrams for day 81 (a), day 225 (b), and day 379 (c) of Example 5.

[0021] Figure 6 This is the status diagram for day 225 of Example 6.

[0022] Figure 7 This is the status diagram on day 81 of Example 7. Detailed Implementation

[0023] The following embodiments further illustrate the content of the present invention, but should not be construed as limiting the present invention. Any modifications or substitutions made to the methods, steps, or conditions of the present invention without departing from the spirit and essence of the invention are within the scope of the present invention.

[0024] Experimental materials:

[0025] Fresh Cistanche deserticola (originating from Alashan, Inner Mongolia): refers to the fleshy stems of Cistanche deserticola or other Cistanche species belonging to the Orobanchaceae family. This application selects fresh Cistanche deserticola stems of similar size, thickness, and maturity, grouping them into one group. The freshly harvested Cistanche deserticola has a moisture content of over 80%.

[0026] Reagents:

[0027] β-Cyclodextrin (food grade), brand: Tuojian, manufacturer: Mengzhou Huaxing Biochemical Co., Ltd.;

[0028] Maltodextrin (food grade), brand: Xiwang, manufacturer: Shandong Xiwang Sugar Industry Co., Ltd.

[0029] Starch (food grade), brand: Guxiangyuan, manufacturer: Jiangsu Guxiangyuan Food Co., Ltd.;

[0030] Food grade flour, brand: Wudeli, manufacturer: Wudeli Flour Group.

[0031] Packaging materials:

[0032] Wood pulp absorbent paper, brand: Lidehui, manufacturer: Dongguan Jieran Paper Industry Co., Ltd.;

[0033] Polyethylene (PE) food wrap, brand: Xingye, manufacturer: Huizhou Xingfeng New Material Technology Co., Ltd.

[0034] Equipment: Electronic balance, constant temperature and humidity refrigerator.

[0035] β-Cyclodextrin, also known as cyclomaltheptaose or cycloheptadextrin, abbreviated as β-CD, is a cyclic compound composed of seven glucose residues linked by β-1,4-glycosidic bonds, extracted from starch by microbial enzymatic action. It has a relative molecular mass of 1135. It is a white or almost white crystalline solid or crystalline powder; odorless, slightly sweet; soluble in water, sparingly soluble in methanol, ethanol, acetone, etc.; stable in alkaline aqueous solutions, but slowly hydrolyzes in acidic environments, its iodine complex is yellow; crystals are plate-like; it can form inclusion complexes with various compounds, providing stability, solubilization, sustained release, emulsification, antioxidant, anti-decomposition, heat preservation, and moisture protection.

[0036] Regarding preservation: In this invention, "preservation" means that the water loss rate of fresh Cistanche deserticola is within a certain range during the storage period, and that it does not change color, mold, rot, or have any off-odors.

[0037] The embodiments of the present invention will now be described in detail.

[0038] Example 1:

[0039] Take 10 fresh Cistanche deserticola plants. For each plant, use 15 grams of β-cyclodextrin. First, apply part of the β-cyclodextrin to the opening of the scales on the fresh Cistanche deserticola plants. Then, spread the remaining β-cyclodextrin evenly on absorbent paper. Tightly wrap the coated Cistanche deserticola plants with one layer of absorbent paper, and then seal them with two layers of plastic wrap.

[0040] Example 2:

[0041] The method is basically the same as in Example 1, except that the amount of β-cyclodextrin used is 12g / piece, the coated Cistanche deserticola is tightly wrapped with two layers of absorbent paper, and then sealed with three layers of plastic wrap.

[0042] Example 3:

[0043] It is basically the same as Example 2, except that the amount of β-cyclodextrin used is 17g / piece.

[0044] Compare with Examples 1-4:

[0045] The difference between Comparative Examples 1-3 and Example 1 is that the outer surface of fresh Cistanche deserticola is not coated with a β-cyclodextrin layer, but only wrapped with absorbent paper and / or plastic wrap. The difference between Comparative Example 4 and Example 1 is that the outer surface of fresh Cistanche deserticola is only wrapped with plastic wrap, as detailed in Table 1 below.

[0046] Table 1 Comparison Examples 1-4

[0047] Compare with Example 1 Compare with Example 2 Compare with Example 3 Compare with Example 4 absorbent paper + plastic wrap plastic wrap absorbent paper β-Cyclodextrin + Plastic Wrap

[0048] Compare with Examples 5-7:

[0049] The difference from Example 1 is that the preservative used is different, as detailed in Table 2 below.

[0050] Table 2 Comparative Examples 5-7

[0051]

[0052] Experimental Example 1:

[0053] The experimental setup included Examples 1-3, Control Examples 1-7, and a blank control group. Each group contained 10 fresh Cistanche deserticola plants of similar size, thickness, and maturity. Except for the blank control group, which received no treatment, all other groups were treated according to the above protocol. After weighing and recording the initial average mass W0, all groups were stored at 6°C, and their state and mass changes during storage were monitored. These results are recorded in Tables 3 and 4. In Table 3...

[0054] 1 point indicates: completely rotten;

[0055] 2 points indicates: partially rotten, completely discolored, and has an odor;

[0056] A score of 3 indicates: mold spots on the surface and discoloration of most of the surface;

[0057] A score of 4 indicates: slight discoloration on the surface and discoloration at the tips of the scales;

[0058] A score of 5 indicates that the surface is basically undiscolored and damp.

[0059] A score of 6 indicates that the surface is dry, free from rot, discoloration, and odor.

[0060] In Table 4, the weights after a period of time are the average weights of each group. Specifically, the weight on the first day is the initial weight, denoted as W0; the weight on the 35th day is denoted as W1; the weight on the 81st day is denoted as W2; the weight on the 225th day is denoted as W3; and the weight on the 379th day is denoted as W4.

[0061] Table 3. Status of Cistanche deserticola products in each group during storage.

[0062]

[0063]

[0064] Table 4. Average weight of Cistanche deserticola products in each group during storage.

[0065]

[0066] Table 5 Average water loss rate during storage in Examples 1-3

[0067] Group Example 1 Example 2 Example 3 Water loss rate 9.7％ 9.4％ 8.1％

[0068] The method for calculating the water loss rate is: Water loss rate = [(W0 - W n ) / W0]×100%; n=1~4, the data in Table 5 are all calculated when n=4.

[0069] Results Analysis: As shown in Tables 3-5, during the 379-day storage period, the fresh Cistanche deserticola in Examples 1-3 remained in good condition, without rotting, blackening, or developing off-odors. The water loss rate was consistently controlled below 10%, demonstrating excellent long-term preservation capabilities. It should be noted that the weight of Control Example 1 on day 225 was significantly greater than its weight on day 1. This is because Control Example 1 had completely rotted by day 225, resulting in a weight increase.

[0070] By comparing the results of Control Examples 1-4 with those of Examples 1-3, it was found that the preservation time of Control Example 1 (using only absorbent paper and plastic wrap) was longer than that of Control Example 2 (using only plastic wrap) and Control Example 3 (using only absorbent paper), indicating that the synergistic effect of absorbent paper and plastic wrap helps to extend the preservation time.

[0071] As shown in Tables 3 and 4, applying various preservatives (starch, maltodextrin, and flour, corresponding to Control Examples 5-7) to the surface of fresh Cistanche deserticola can extend the shelf life to some extent. However, their preservation effects are not as good as those of the β-cyclodextrin used in this application. Specifically, Control Examples 5-7 showed signs of deterioration such as color changes, mold spots, and rot during storage, while the samples of Examples 1-3 remained dry, had normal color, and had no off-odors throughout the entire storage period.

[0072] Therefore, under exactly the same packaging and storage conditions, the β-cyclodextrin coating used in this invention exhibits a better preservation effect.

[0073] This application uses a representative state diagram to illustrate the state: Figure 1 (a) shows the fresh state of Cistanche deserticola. Figure 1 (b) Fresh Cistanche deserticola is dry, without rot or discoloration; Figure 2 (a) shows the slightly discolored surface of fresh Cistanche deserticola. Figure 2 (b) shows the localized discoloration on the surface of fresh Cistanche deserticola; Figure 3 The fresh Cistanche deserticola has mold on its surface; Figure 4 (a) shows the fresh Cistanche deserticola in a state where the surface is basically undiscolored. Figure 4 (b) shows the completely rotten state of the surface of fresh Cistanche deserticola; Figure 5 (a) shows the state of fresh Cistanche deserticola, where the surface is basically uncolored except for the tips of the scales. Figure 5 (b) shows fresh Cistanche deserticola with mold spots on its surface. Figure 5 (c) shows the discoloration state of most of the surface of fresh Cistanche deserticola; Figure 6 This indicates that the surface of fresh Cistanche deserticola has changed color and is spoiled. Figure 7 This is the state of partial rot on the surface of fresh Cistanche deserticola.

[0074] The above-described embodiments are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from the spirit of the present invention should fall within the protection scope defined by the claims of the present invention.

Claims

1. A Cistanche deserticola product, characterized in that, The Cistanche deserticola product includes fresh Cistanche deserticola, a β-cyclodextrin layer coated on the outer surface of the fresh Cistanche deserticola, and absorbent paper and plastic wrap sequentially wrapped around the β-cyclodextrin layer. The moisture content of the Cistanche deserticola product is not less than 70%.

2. The Cistanche deserticola product as described in claim 1, characterized in that, The application process involves first applying a portion of the β-cyclodextrin to the opening portion of the scales of the fresh Cistanche deserticola, and then evenly spreading the remaining β-cyclodextrin onto the absorbent paper.

3. The Cistanche deserticola product as described in claim 1, characterized in that, The amount of β-cyclodextrin used is 12-17 g / piece.

4. The Cistanche deserticola product as described in claim 3, characterized in that, The absorbent paper is wrapped in 1 to 2 layers, and the plastic wrap is wrapped in 2 to 3 layers.

5. The Cistanche deserticola product as described in claim 1, characterized in that, The fresh Cistanche deserticola mentioned refers to freshly harvested Cistanche deserticola or Cistanche tubulosa.

6. The Cistanche deserticola product as described in claim 1, characterized in that, The harvesting season for the fresh Cistanche deserticola is from April to May or from September to October.

7. A method for preparing a Cistanche deserticola product, characterized in that, A β-cyclodextrin layer is coated on the outer surface of fresh Cistanche deserticola; absorbent paper and plastic wrap are then wrapped around the β-cyclodextrin layer to obtain the Cistanche deserticola product.

8. A method for preserving fresh Cistanche deserticola, characterized in that, A β-cyclodextrin layer is coated on the outer surface of fresh Cistanche deserticola; absorbent paper and plastic wrap are then wrapped around the β-cyclodextrin layer to obtain the Cistanche deserticola product; the Cistanche deserticola product is then refrigerated at 4℃~8℃.

9. The method for preserving fresh Cistanche deserticola as described in claim 8, characterized in that, The refrigeration temperature of the Cistanche deserticola product is 6℃.

10. The application of a β-cyclodextrin as a preservative for fresh Cistanche deserticola or Cistanche deserticola products, characterized in that, Preferably, the Cistanche deserticola product is prepared according to the method described in claim 7.

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