CN115336688B - Method for preparing pagodatree flower bud beverage through hydrothermal treatment - Google Patents
Method for preparing pagodatree flower bud beverage through hydrothermal treatment Download PDFInfo
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- CN115336688B CN115336688B CN202211004894.2A CN202211004894A CN115336688B CN 115336688 B CN115336688 B CN 115336688B CN 202211004894 A CN202211004894 A CN 202211004894A CN 115336688 B CN115336688 B CN 115336688B
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- pagodatree flower
- beverage
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Classifications
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- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L2/00—Non-alcoholic beverages; Dry compositions or concentrates therefor; Their preparation
- A23L2/38—Other non-alcoholic beverages
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23L—FOODS, FOODSTUFFS, OR NON-ALCOHOLIC BEVERAGES, NOT COVERED BY SUBCLASSES A21D OR A23B-A23J; THEIR PREPARATION OR TREATMENT, e.g. COOKING, MODIFICATION OF NUTRITIVE QUALITIES, PHYSICAL TREATMENT; PRESERVATION OF FOODS OR FOODSTUFFS, IN GENERAL
- A23L33/00—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof
- A23L33/10—Modifying nutritive qualities of foods; Dietetic products; Preparation or treatment thereof using additives
- A23L33/105—Plant extracts, their artificial duplicates or their derivatives
-
- A—HUMAN NECESSITIES
- A23—FOODS OR FOODSTUFFS; TREATMENT THEREOF, NOT COVERED BY OTHER CLASSES
- A23V—INDEXING SCHEME RELATING TO FOODS, FOODSTUFFS OR NON-ALCOHOLIC BEVERAGES AND LACTIC OR PROPIONIC ACID BACTERIA USED IN FOODSTUFFS OR FOOD PREPARATION
- A23V2002/00—Food compositions, function of food ingredients or processes for food or foodstuffs
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- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Nutrition Science (AREA)
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Polymers & Plastics (AREA)
- Botany (AREA)
- Mycology (AREA)
- Non-Alcoholic Beverages (AREA)
Abstract
The invention discloses a method for preparing a pagodatree flower bud beverage through hydrothermal treatment, and belongs to the field of food processing. The invention relates to a method for preparing pagodatree flower bud beverage by hydrothermal treatment, which comprises the following steps: cleaning fresh flos Sophorae Immaturus, preparing into fresh flos Sophorae Immaturus raw material liquid, oven drying, and pulverizing to obtain flos Sophorae Immaturus powder; placing pagodatree flower bud powder into a hydrothermal processor, adding drinking water or 70% ethanol according to a certain feed-liquid ratio, wherein the hydrothermal treatment temperature is 160-180 ℃ and the hydrothermal treatment time is 30-90 min, and obtaining a hydrothermal extract; filtering the extract, collecting filtrate, and steaming to obtain flos Sophorae Immaturus extract concentrate; adding drinking water, sucrose and stabilizer into the concentrated solution of flos Sophorae Immaturus extract in proportion, blending, filtering, packaging, and sterilizing to obtain flos Sophorae Immaturus beverage; the pagodatree flower bud beverage has remarkable inhibiting effect on xanthine oxidase activity and can reduce urine and serum uric acid level of hyperuricemia mice.
Description
Technical Field
The invention relates to a method for preparing a pagodatree flower bud beverage through hydrothermal treatment, and belongs to the field of food processing.
Background
In recent years, hyperuricemia is becoming the "fourth highest" threatening human health following "hyperglycemia, hyperlipidemia, hypertension" due to the increasing proportion of high purine diets and poor eating habits, and the proportion of hyperuricemia occurring in young people is increasing. The traditional hyperuricemia diagnosis standard is that the uric acid in male blood is more than 7mg/dL, the uric acid in female blood is more than 5.7mg/dL, and long-term hyperuricemia can cause gout and a series of complications, but most young people with high uric acid are at the critical edge of hyperuricemia at the present stage, and have no obvious symptoms such as gout, cardiovascular and cerebrovascular diseases and the like.
The clinical uric acid lowering drugs are mainly used for obvious symptoms such as gout and the like, including allopurinol, febuxostat, primKaxi and the like, and the clinically used drugs are found to have various side effects and possibly cause symptoms such as headache, rash, allergy, metabolic disorder and the like of patients. Therefore, the development of the active ingredient from natural sources as a uric acid lowering drug substitute has wide application prospect.
The pagodatree flower bud (Flos Sophorae Immaturus) is a dried flower bud of Sophora japonica L.of Leguminosae, and is mainly distributed in China and parts of southeast Asia countries. As a plant with homology of medicine and food, pagodatree flower bud is reported in Ben Cao gang mu as early as Ming Dynasty Li Zhi, and the book records pagodatree flower bud 'stir-fried, fragrant, chewed frequently' and treats aphonia and sore throat. It also treats hematemesis, smoking and blood, and metrorrhagia. Modern researches have shown that pagodatree flower bud has various health care effects of resisting oxidation, inflammation, virus, blood sugar, blood fat, blood pressure and cancer, etc. Phenolic substances are proved to be the main active ingredients in pagodatree flower buds, including rutin (> 18%, dry matter content), kaempferol-3-O-rutinoside, isorhamnetin-3-O-rutinoside, quercetin, kaempferol, etc., with the rutin content being relatively highest. Meanwhile, a plurality of researches show that the phenolic substances can obviously inhibit xanthine oxidase activity and reduce serum uric acid level of mice with hyperuricemia, in particular to quercetin. Therefore, the pagodatree flower bud has the potential of developing into uric acid-reducing foods.
However, most of phenolic substances in the pagodatree flower bud have poor water solubility and poor absorption effect, and the traditional processing modes of chemical hydrolysis, enzymolysis, fermentation and the like are that rutin is firstly extracted from the pagodatree flower bud, and then the rutin is hydrolyzed to obtain the quercetin. Although rutin can be converted into quercetin with higher activity to a certain extent, degradation of phenolic substances is easy to cause in the processing process, the operation is complex, and the application range is limited.
The Chinese patent No. 104592186A discloses a new technology for preparing quercetin by using pagodatree flower bud one-pot boiling method, which is characterized in that pagodatree flower bud is crushed, the pH value of ethanol is regulated to 1-2 by using concentrated sulfuric acid, sodium bisulphite with the concentration of 0.5-1% is added as an extracting agent, and the circulating extraction of quercetin is carried out in a pressure tank under the pressure of 0.2-0.4 Mpa and the extracting temperature of 70-80 ℃. However, the extraction method has low pH of the system, has corrosion to equipment and has high requirements on process conditions.
Chinese patent No. 103960737B discloses a flos Sophorae Immaturus beverage, which is prepared by parching flos Sophorae Immaturus with medium fire for 10-15 min, and then mixing flos Lonicerae, flos Chrysanthemi, herba Menthae, and stevia rebaudiana with flos Sophorae Immaturus extractive solution. However, the treatment of the pagodatree flower bud raw material by the method can cause degradation of most of phenolic substances in the pagodatree flower bud, so that the phenolic substances in the pagodatree flower bud cannot be effectively utilized, and the efficacy of the pagodatree flower bud beverage is improved.
The hydrothermal treatment is used as a simple and economical physical processing mode, and has industrial application prospect. The processing of uric acid-reducing pagodatree flower bud beverage by hydrothermal treatment has not been reported yet.
Disclosure of Invention
[ problem ]
Aiming at the technical problems in the prior art, the invention provides a method for preparing the pagodatree flower bud beverage by hydrothermal treatment, which can effectively solve the problems of complex process, acid pollution, degradation of polyphenol substances, reduction of active substances and the like in the existing pagodatree flower bud processing technology.
[ technical solution ]
The invention aims to provide a method for preparing pagodatree flower bud beverage through hydrothermal treatment, which comprises the following steps:
(1) Cleaning fresh pagodatree flower bud, adding drinking water according to a certain feed liquid ratio, and performing ultrasonic treatment to form fresh pagodatree flower bud raw material liquid;
(2) Draining the fresh pagodatree flower bud subjected to ultrasonic treatment in the step (1), and removing the water by drying; pulverizing the dried pagodatree flower bud, and sieving with a 60-100 mesh sieve to obtain pagodatree rice flour;
(3) Placing the pagodatree flower bud powder obtained in the step (2) into a hydrothermal processor, mixing according to a certain feed-liquid ratio, and obtaining a hydrothermal extract, wherein the hydrothermal treatment temperature is 160-180 ℃ and the hydrothermal treatment time is 30-90 min;
(4) Filtering the hydrothermal extract obtained in the step (3), taking filtrate, and performing rotary steaming on the pagodatree flower bud filtrate to obtain pagodatree flower bud extract concentrated solution;
(5) Adding drinking water, sucrose and a stabilizer into the concentrated solution of the pagodatree flower bud extract obtained in the step (4) according to a proportion, blending, filtering, filling and sterilizing to obtain the pagodatree flower bud beverage.
In one embodiment, the feed liquid ratio in the step (1) refers to that drinking water or 70% ethanol and pagodatree flower bud powder are added to form feed liquid, and the feed liquid ratio is 1-3: 1.
in one embodiment, the ultrasonic treatment in the step (1) is that fresh pagodatree flower bud immersed in water is placed in an ultrasonic crusher, the ultrasonic power is 300-500W, the ultrasonic time is 20-40 min, the ultrasonic frequency is 20-40 kHz, and the temperature of a sample cell is 30-40 ℃.
In one embodiment, the drying in step (2) is natural drying or hot air drying, until the water content of the pagodatree flower bud is lower than 14%.
In one embodiment, the feed liquid ratio in step (3) is 1 to 4:60.
in this embodiment, the spin-steaming temperature in the step (4) is 60-80 ℃, and the spin-steaming is performed until the volume is reduced to 1/5.
In one embodiment, the adding ratio of the drinking water in the step (5) to the pagodatree flower bud concentrated solution is 10-20: 1, the adding amount of sucrose relative to the pagodatree flower bud beverage is 2-5%, and the adding amount of stabilizing agent relative to the pagodatree flower bud beverage is 0.4-1%; the stabilizer is sodium alginate and/or chitosan.
Another object of the present invention is to provide a pagodatree flower bud beverage prepared by the above method.
A third object of the present invention is to provide an application of the pagodatree flower bud beverage in the food field.
The invention has the beneficial effects that:
according to the invention, the fresh pagodatree flower bud is used as a raw material, firstly, the fresh pagodatree flower bud is subjected to ultrasonic pretreatment, so that more phenolic substances in the pagodatree flower bud are dissolved out in the pagodatree flower bud, and the phenolic substances are not easy to degrade; then combining the pagodatree flower bud raw materials subjected to the hydrothermal treatment and ultrasonic treatment, so that phenolic substances in the pagodatree flower bud are subjected to the hydrothermal treatment for 30-90 min under the conditions that the temperature of the hydrothermal treatment is 160-180 ℃: (1) the dissolution rate of phenols is improved; (2) The combined phenolic substance is converted into a free state, so that the extraction is easier; (3) The phenolic substances are easier to degrade and convert (rutin is easier to convert into the phenolic substances with high activity such as quercetin). In addition, the inhibition activity of the pagodatree flower bud concentrated solution after the hydrothermal treatment to xanthine oxidase is obviously improved, and the prepared pagodatree flower bud beverage has good physiological efficacy of relieving hyperuricemia, has simple production process and is suitable for industrial production.
Drawings
FIG. 1 is a graph showing degradation and conversion of main phenols in the pagodatree flower bud beverage treated in comparative example 1 and example 1.
Detailed Description
The following description of the preferred embodiments of the present invention is provided for better illustration of the invention, and should not be construed as limiting the invention.
Example 1
A method for preparing pagodatree flower bud beverage by hydrothermal treatment, which comprises the following steps:
(1) Cleaning fresh pagodatree flower bud, and according to the feed-liquid ratio of 2:1, adding drinking water in proportion;
(2) Carrying out ultrasonic treatment on fresh pagodatree flower bud feed liquid by using an ultrasonic breaker, wherein the ultrasonic power is 500W, the ultrasonic time is 20min, the ultrasonic frequency is 20kHz, and the temperature of a sample cell is 30 ℃;
(3) Draining off water from the ultrasonic-treated pagodatree flower bud, drying by hot air to remove water, and drying at the temperature of 60 ℃ until the water content of the pagodatree flower bud is lower than 14%;
(4) Pulverizing dried flos Sophorae Immaturus with pulverizer, sieving with 80 mesh sieve to obtain flos Sophorae Immaturus powder;
(5) Placing the pagodatree flower bud powder obtained in the step (4) into a hydrothermal processor according to a feed-liquid ratio of 1:50 adding 70% ethanol, and performing hydrothermal treatment at 180deg.C for 50min to obtain hydrothermal extract;
(6) Filtering the hydrothermal extract obtained in the step (5), repeatedly extracting residues for 3 times, and combining the extracting solutions;
(7) Performing rotary steaming on the extracting solution obtained in the step (6) at 65 ℃ until the volume is reduced to 1/10, thereby obtaining a concentrated solution of the pagodatree flower bud extract;
(8) Adding drinking water, sucrose and a stabilizer into the pagodatree flower bud concentrated solution obtained in the step (7) according to the proportion for blending, wherein the adding proportion of the drinking water to the pagodatree flower bud concentrated solution is 20:1, the adding amount of sucrose is 2.5%, the adding amount of stabilizer sodium alginate is 0.4% and the adding amount of chitosan is 0.4%;
(9) Filtering, filling and sterilizing the solution prepared in the step (8) to prepare the pagodatree flower bud beverage.
Example 2
A method for preparing pagodatree flower bud beverage by hydrothermal treatment, which comprises the following steps:
(1) Cleaning fresh pagodatree flower bud, and according to the feed-liquid ratio of 2:1, adding drinking water in proportion;
(2) Carrying out ultrasonic treatment on fresh pagodatree flower bud feed liquid by using an ultrasonic breaker, wherein the ultrasonic power is 500W, the ultrasonic time is 20min, the ultrasonic frequency is 20kHz, and the temperature of a sample cell is 30 ℃;
(3) Draining off water from the ultrasonic-treated pagodatree flower bud, drying by hot air to remove water, and drying at the temperature of 60 ℃ until the water content of the pagodatree flower bud is lower than 14%;
(4) Pulverizing dried flos Sophorae Immaturus with pulverizer, sieving with 80 mesh sieve to obtain flos Sophorae Immaturus powder;
(5) Placing the pagodatree flower bud powder obtained in the step (4) into a hydrothermal processor according to a feed-liquid ratio of 1:50 adding drinking water, and performing hydrothermal treatment at 180deg.C for 50min to obtain hydrothermal extract;
(6) Filtering the hydrothermal extract obtained in the step (5), repeatedly extracting residues for 3 times, and combining the extracting solutions;
(7) Performing rotary steaming on the extracting solution obtained in the step (6) at 65 ℃ until the volume is reduced to 1/5, thereby obtaining a concentrated solution of the pagodatree flower bud extract;
(8) Adding drinking water, sucrose and a stabilizer into the pagodatree flower bud concentrated solution obtained in the step (7) according to the proportion for blending, wherein the adding proportion of the drinking water to the pagodatree flower bud concentrated solution is 20:1, the adding amount of sucrose is 2.5%, the adding amount of stabilizer sodium alginate is 0.4% and the adding amount of chitosan is 0.4%;
(9) Filtering, filling and sterilizing the solution prepared in the step (8) to prepare the pagodatree flower bud beverage.
Example 3
A method for preparing pagodatree flower bud beverage by hydrothermal treatment, which comprises the following steps:
(1) Cleaning fresh pagodatree flower bud according to the feed-liquid ratio of 2.5:1, adding drinking water in proportion;
(2) Carrying out ultrasonic treatment on fresh pagodatree flower bud feed liquid by using an ultrasonic breaker, wherein the ultrasonic power is 300W, the ultrasonic time is 40min, the ultrasonic frequency is 20kHz, and the temperature of a sample cell is 35 ℃;
(3) Draining off water from the ultrasonic-treated pagodatree flower bud, naturally drying to remove water, and drying until the water content of the pagodatree flower bud is lower than 14%;
(4) Pulverizing dried flos Sophorae Immaturus with pulverizer, sieving with 60 mesh sieve to obtain flos Sophorae Immaturus powder;
(5) Placing the pagodatree flower bud powder obtained in the step (4) into a hydrothermal processor according to a feed-liquid ratio of 1:50 adding 70% ethanol, and performing hydrothermal treatment at 170deg.C for 50min to obtain hydrothermal extract;
(6) Filtering the hydrothermal extract obtained in the step (5), repeatedly extracting residues for 3 times, and combining the extracting solutions;
(7) Performing rotary steaming on the extracting solution obtained in the step (6) at 65 ℃ until the volume is reduced to 1/10, thereby obtaining a concentrated solution of the pagodatree flower bud extract;
(8) Adding drinking water, sucrose and a stabilizer into the pagodatree flower bud concentrated solution obtained in the step (7) according to the proportion for blending, wherein the adding proportion of the drinking water to the pagodatree flower bud concentrated solution is 20:1, the adding amount of sucrose is 2%, the adding amount of stabilizer sodium alginate is 0.2% and the adding amount of chitosan is 0.4%;
(9) Filtering, filling and sterilizing the solution prepared in the step (8) to prepare the pagodatree flower bud beverage.
Example 4
A method for preparing pagodatree flower bud beverage by hydrothermal treatment, which comprises the following steps:
(1) Cleaning fresh pagodatree flower bud, and according to the feed-liquid ratio of 2:1, adding drinking water in proportion;
(2) Carrying out ultrasonic treatment on fresh pagodatree flower bud feed liquid by using an ultrasonic breaker, wherein the ultrasonic power is 500W, the ultrasonic time is 20min, the ultrasonic frequency is 20kHz, and the temperature of a sample cell is 30 ℃;
(3) Draining off water from the ultrasonic-treated pagodatree flower bud, naturally drying to remove water, and drying until the water content of the pagodatree flower bud is lower than 14%;
(4) Pulverizing dried flos Sophorae Immaturus with pulverizer, sieving with 80 mesh sieve to obtain flos Sophorae Immaturus powder;
(5) Placing the pagodatree flower bud powder obtained in the step (4) into a hydrothermal processor according to a feed-liquid ratio of 1:50 adding drinking water, and performing hydrothermal treatment at 160deg.C for 30min to obtain hydrothermal extract;
(6) Filtering the hydrothermal extract obtained in the step (5), repeatedly extracting residues for 3 times, and combining the extracting solutions;
(7) Performing rotary steaming on the extracting solution obtained in the step (6) at 65 ℃ until the volume is reduced to 1/5, thereby obtaining a concentrated solution of the pagodatree flower bud extract;
(8) Adding drinking water, sucrose and a stabilizer into the pagodatree flower bud concentrated solution obtained in the step (7) according to a proportion for blending; the adding proportion of the drinking water to the pagodatree flower bud concentrated solution is 20:1, the adding amount of sucrose is 2.5%, the adding amount of stabilizer sodium alginate is 0.4%, and the adding amount of chitosan is 0.4%.
(9) Filtering, filling and sterilizing the solution prepared in the step (8) to prepare the pagodatree flower bud beverage.
Comparative example 1
(1) Cleaning fresh flos Sophorae Immaturus, drying with hot air at 60deg.C until the water content of flos Sophorae Immaturus is below 14%;
(2) Pulverizing dried flos Sophorae Immaturus with pulverizer, sieving with 80 mesh sieve to obtain flos Sophorae Immaturus powder;
(3) Placing the pagodatree flower bud powder in the step (2) into a beaker according to a feed liquid ratio of 1:50 adding 70% ethanol, magnetically stirring and extracting for 50min at stirring speed of 300r/min;
(4) Filtering the extract obtained in the step (3), repeatedly extracting residues for 3 times, and combining the extracting solutions;
(5) Performing rotary steaming on the extracting solution obtained in the step (4) at 65 ℃ until the volume is reduced to 1/10, thereby obtaining a concentrated solution of the pagodatree flower bud extract;
(6) Adding drinking water, sucrose and a stabilizer into the pagodatree flower bud concentrated solution obtained in the step (5) according to the proportion for blending, wherein the adding proportion of the drinking water to the pagodatree flower bud concentrated solution is 20:1, the adding amount of sucrose is 2.5%, the adding amount of stabilizer sodium alginate is 0.4% and the adding amount of chitosan is 0.4%;
(7) Filtering, filling and sterilizing the solution prepared in the step (6) to prepare the pagodatree flower bud beverage.
Comparative example 2
(1) Cleaning fresh flos Sophorae Immaturus, drying with hot air at 60deg.C until the water content of flos Sophorae Immaturus is below 14%;
(2) Pulverizing dried flos Sophorae Immaturus with pulverizer, sieving with 80 mesh sieve to obtain flos Sophorae Immaturus powder;
(3) Placing the pagodatree flower bud powder in the step (2) into a hydrothermal processor according to a feed liquid ratio of 1:50 percent of 70 percent ethanol is added, the hydrothermal treatment temperature is 180 ℃, and the hydrothermal treatment time is 50 minutes; obtaining a hydrothermal extract;
(4) Filtering the hydrothermal extract obtained in the step (3), repeatedly extracting residues for 3 times, and combining the extracting solutions;
(5) Performing rotary steaming on the extracting solution obtained in the step (4) at 65 ℃ until the volume is reduced to 1/10, thereby obtaining a concentrated solution of the pagodatree flower bud extract;
(6) Adding drinking water, sucrose and a stabilizer into the pagodatree flower bud concentrated solution obtained in the step (5) according to the proportion for blending, wherein the adding proportion of the drinking water to the pagodatree flower bud concentrated solution is 20:1, the adding amount of sucrose is 2.5%, the adding amount of sodium alginate is 0.4% and the adding amount of chitosan is 0.4%;
(7) Filtering, filling and sterilizing the solution prepared in the step (6) to prepare the pagodatree flower bud beverage.
Comparative example 3
(1) Cleaning fresh pagodatree flower bud, and according to the feed-liquid ratio of 2:1, adding drinking water in proportion;
(2) Performing ultrasonic treatment on fresh pagodatree flower bud raw materials by using an ultrasonic breaker, wherein the ultrasonic power is 500W, the ultrasonic time is 20min, the ultrasonic frequency is 20kHz, and the temperature of a sample cell is 30 ℃;
(3) Draining off water from the ultrasonic-treated pagodatree flower bud, drying by hot air to remove water, and drying at the temperature of 60 ℃ until the water content of the pagodatree flower bud is lower than 14%;
(4) Pulverizing dried flos Sophorae Immaturus with pulverizer, and sieving with 80 mesh sieve;
(5) Placing the pagodatree flower bud powder in the step (4) into a beaker according to a feed liquid ratio of 1:50 adding 70% ethanol, magnetically stirring and extracting for 50min at stirring speed of 300r/min;
(6) Filtering the extract obtained in the step (5), repeatedly extracting residues for 3 times, and combining the extracting solutions;
(7) Performing rotary steaming on the extracting solution obtained in the step (6) at 65 ℃ until the volume is reduced to 1/10, thereby obtaining a concentrated solution of the pagodatree flower bud extract;
(8) Adding drinking water, sucrose, a stabilizer and the like into the pagodatree flower bud concentrated solution obtained in the step (7) according to a proportion for blending, wherein the adding proportion of the drinking water to the pagodatree flower bud concentrated solution is 20:1, the adding amount of sucrose is 2.5%, the adding amount of sodium alginate is 0.4% and the adding amount of chitosan is 0.4%;
(9) Filtering, filling and sterilizing the solution prepared in the step (8) to prepare the pagodatree flower bud beverage.
Comparative example 4
The difference from example 1 is only that step (5) is carried out according to a feed to liquid ratio of 1: 50% ethanol is added, the hydrothermal treatment temperature is 130 ℃, and the hydrothermal treatment time is 50min.
Comparative example 5
The difference from example 1 is only that step (5) is carried out according to a feed to liquid ratio of 1: 50% ethanol is added, the hydrothermal treatment temperature is 210 ℃, and the hydrothermal treatment time is 50min.
Performance measurement
Measuring the rutin content, the quercetin content and the xanthine oxidase in vitro inhibition activity of the pagodatree flower bud beverages of examples 1-4 and comparative examples 1-5 respectively by using a high performance liquid chromatography; the total flavone content of the tea soup is determined by adopting a sodium nitrite-aluminum chloride complexation spectrophotometry (spectrophotometry DB 34/T2743-2016) for determining the total flavone content in the pagodatree flower bud and the products thereof.
Hyperuricemia mice were modeled by gavage of hypoxanthine (500 mg/kg bw) and intraperitoneal injection of potassium oxazinate (200 mg/kg bw), and mice were gavaged with the pagodatree flower bud beverage, and the blank group was gavaged with 0.5% sodium carboxymethylcellulose, and the drug group was gavaged with allopurinol, and the urine and serum uric acid levels of the mice were determined, with the results shown in tables 1 and 2.
TABLE 1 variation of content of rutin, quercetin and total flavonoids in examples and comparative examples
TABLE 2 comparison of xanthine oxidase inhibitory Activity, urine and serum uric acid levels in examples and comparative examples
From the above results, it can be seen that:
(1) Analysis of the results of comparative examples 1, 4, 5 and example 1 in Table 1 shows that rutin in pagodatree flower bud can be converted into quercetin at a certain temperature, and that rutin is more easily converted into quercetin at 160-180deg.C, as shown in figure 1.
(2) As can be seen from the data in table 2, compared with example 1, the pagodatree flower bud beverage in comparative example 1 was not treated at all, the pagodatree flower bud beverage in comparative example 2 was not treated by ultrasonic treatment, the pagodatree flower bud beverage in comparative example 3 was not treated by hydrothermal treatment, the xanthine oxidase inhibitory activity of the three comparative examples was significantly lower than that of example 1, and the uric acid content of urine and serum was significantly higher than that of example 1, indicating that the combination of ultrasonic and hydrothermal treatments can enhance the uric acid lowering effect of the pagodatree flower bud beverage.
(3) The xanthine oxidase inhibitory activity of example 1 was higher than that of example 2, and urine uric acid and serum uric acid levels were lower than that of example 2, demonstrating that extraction using 70% ethanol during hydrothermal treatment was superior to potable water extraction.
(4) In comparative example 4, the rutin content was higher than that in example 1, the quercetin content was lower than that in example 1, the uric acid content in urine and the uric acid content in serum were both higher than that in example 1, and the xanthine oxidase inhibitory activity was lower than that in example 1. The result shows that the conversion rate of polyphenol in the pagodatree flower bud beverage is lower when the hydrothermal treatment temperature is lower than 150 ℃, and the uric acid reducing effect is not obvious.
(5) In comparative example 5, rutin and quercetin were both contained in amounts lower than in example 1, uric acid in urine and uric acid in serum were both contained in amounts higher than in example 1, and xanthine oxidase inhibitory activity was lower than in example 1. The result shows that the degradation rate of all phenolic substances in the pagodatree flower bud beverage is higher than the conversion rate when the hydrothermal treatment temperature is higher than 180 ℃, and the uric acid reducing effect is not obvious.
While the invention has been described with reference to the preferred embodiments, it is not limited thereto, and various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (6)
1. A method for preparing a pagodatree flower bud beverage by hydrothermal treatment, which is characterized by comprising the following steps:
(1) Fresh pagodatree flower bud is cleaned, and the feed liquid ratio is 1-3: 1, adding drinking water and performing ultrasonic treatment; the method comprises the steps of placing fresh pagodatree flower buds in an ultrasonic crusher, wherein the ultrasonic power is 300-500W, the ultrasonic time is 20-40 min, the ultrasonic frequency is 20-40 kHz, and the temperature of a sample cell is 30-40 ℃;
(2) Draining the fresh pagodatree flower bud subjected to ultrasonic treatment in the step (1), and removing the water by drying; pulverizing dried flos Sophorae Immaturus to obtain flos Sophorae Immaturus powder;
(3) Placing the pagodatree flower bud powder obtained in the step (2) into a hydrothermal processor, mixing according to a certain feed-liquid ratio, and obtaining a hydrothermal extract, wherein the hydrothermal treatment temperature is 160-180 ℃ and the hydrothermal treatment time is 30-90 min; the feed liquid ratio is 1-4: 60;
(4) Filtering the hydrothermal extract obtained in the step (3), taking filtrate, and performing rotary steaming on the filtrate to obtain a concentrated solution of the pagodatree flower bud extract;
(5) Adding drinking water, sucrose and a stabilizer into the concentrated solution of the pagodatree flower bud extract obtained in the step (4) according to a proportion, blending, filtering, filling and sterilizing to obtain the pagodatree flower bud beverage; the adding proportion of the drinking water to the pagodatree flower bud extract concentrated solution is 10-20: 1, the adding amount of sucrose relative to the pagodatree flower bud beverage is 2-5%, and the adding amount of the stabilizing agent relative to the pagodatree flower bud beverage is 0.4-1%; the stabilizer is sodium alginate and/or chitosan.
2. The method of claim 1, wherein the drying in step (2) is natural drying or hot air drying.
3. The method of claim 2, wherein the drying is drying to a water content of less than 14% of the pagodatree flower bud.
4. The method of claim 1, wherein the comminuting in step (2) is followed by passing through a 60-100 mesh screen.
5. The method of claim 1, wherein the spin-steaming temperature in step (4) is 60-80 ℃, and the spin-steaming is performed until the volume is reduced to 1/5.
6. A pagodatree flower bud beverage prepared by the method of any one of claims 1-5.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103960737A (en) * | 2014-05-27 | 2014-08-06 | 重庆市中药研究院 | Sophora flower bud drink |
| CN107568548A (en) * | 2017-09-27 | 2018-01-12 | 天津大学 | Sophora bud solid beverage and preparation method |
| CN107836521A (en) * | 2017-12-21 | 2018-03-27 | 福建农林大学 | A kind of sophora bud Yoghourt and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103960737A (en) * | 2014-05-27 | 2014-08-06 | 重庆市中药研究院 | Sophora flower bud drink |
| CN107568548A (en) * | 2017-09-27 | 2018-01-12 | 天津大学 | Sophora bud solid beverage and preparation method |
| CN107836521A (en) * | 2017-12-21 | 2018-03-27 | 福建农林大学 | A kind of sophora bud Yoghourt and preparation method thereof |
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