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Preparation method and application of dried vaccinium bracteatum leaves

A technology of black rice leaves and black rice, which is applied in the processing field of black rice leaves, can solve the problems of lack of quality control ingredients, unclear active ingredients and mechanism of dyeing, and easy failure.

Pending Publication Date: 2021-09-14
SUZHOU QIUSHI HERBAL HEALTH TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are more than a hundred kinds of ingredients in the fresh leaves of the black rice tree, and the active ingredients and mechanism of dyeing are still unclear; the existing processed products of the fresh leaves of the black rice tree lack clear quality control ingredients, and the products are prone to failure during processing and storage, thus affecting the The further expansion of the application of the dyeing effect of the leaves of the black rice tree.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: the preparation method of dried leaves of black rice tree

[0013] Fresh leaves of Vaccinium bracteatum Thunb (WF, batch 20190401) were provided by Wuxi Qingjing Wufanshu Professional Cooperative, and were identified as leaves of Vaccinium bracteatum Thunb. According to liquid phase analysis, this batch of fresh leaves contained 14.62 mg / g of aruginin (calculated as dry product). The activity of PPO in fresh leaves was measured to be 203U / g, and the activity of β-glucosidase was 524U / g (based on dry product).

[0014] (1) Preparation of the dry leaves of the sycamore (WD-1): select the fresh leaves of the sycamore, dry them in the shade for 1-3 days, and dry them at 15-50° C. to obtain the dried leaves of the sycamore, and control the moisture content of the final product to be less than 6%. According to detection and analysis, in the dry leaves of the acacia tree, the content range of aruginin is 5.17mg / g (calculated as dry product), the average activity...

Embodiment 2

[0023] Embodiment 2: the application of black rice tree dried leaves in food dyeing

[0024] In order to determine the application method of the dry leaves of agaricus argentina prepared in Example 1, the present invention further researches and establishes an enzymatic dyeing method of the product on the basis of the research on the enzymatic dyeing reaction mechanism of aruginin and rice protein under the action of PPO .

[0025] (1) Dyeing detection method

[0026] Weigh 2g of WF fresh leaves, WD-1 dry leaves, and WD-2 control dry leaf samples of Example 1, respectively, and place them in a test tube, add 20ml of water, 3g of rice, and then add an appropriate amount of enzyme reagent, soak at room temperature for 1h, and then place them in a test tube. React at 50°C for 2 hours, then heat and boil for 30 minutes, let cool, and observe the color change of the rice.

[0027] (2) Comparison of dyeing effects of adding enzymes to dry leaves of black rice tree

[0028] When n...

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PUM

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Abstract

The invention discloses a preparation method of dried vaccinium bracteatum leaves. The method comprises the following steps: selecting fresh vaccinium bracteatum leaves as raw materials, drying in the shade, and drying at 15-50 DEG C to obtain the dried vaccinium bracteatum leaves which contain not less than 3.0 mg / g of vaccinin; and adding 5-20 times of water into the dried vaccinium bracteatum leaves, then adding a proper amount of polyphenol oxidase and edible materials containing protein, soaking for 0.5-6 hours at room temperature, reacting for 1-10 hours at the temperature of 30-55 DEG C, heating and boiling until the edible materials become cooked food which is dyed to be blue to black, cooling, and packaging to obtain the dried vaccinium bracteatum leaves. The dried vaccinium bracteatum leaves and the application method thereof provided by the invention are derived from innovative application of traditional customs, and the preparation method has the advantages of simplicity and convenience in operation and use, wide popularization and application range and the like, and can be applied to the fields of dyeing of protein-containing foods and the like.

Description

technical field [0001] The invention relates to a processing method of black rice leaves, and also relates to the application of the black rice leaves in food dyeing, which belongs to the field of food and dyes. Background technique [0002] Vaccinium bracteatum Thunb (Vaccinium bracteatum Thunb), also known as Nanzhu and Dyeshu, belongs to the evergreen shrub of Rhododendronaceae Vaccinium. It is widely distributed in the south of the Yangtze River in my country. Traditional folk customs use the fresh leaf juice of Vaccinium bracteatum to cook black rice and eat it. . The fresh leaves of black rice tree are a kind of natural black food coloring agent. The black rice made by it is bright and has a special attractive aroma. The dry leaves of the black rice tree lose their effect of dyeing rice, but they can also be used as Chinese medicinal materials. Ming Li Shizhen's "Compendium of Materia Medica" records that "the smell is bitter, flat, and non-toxic. Years, people are no...

Claims

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Application Information

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IPC IPC(8): A23L5/43
CPCA23L5/43A23V2002/00A23V2200/044A23V2250/21
Inventor 刘江云周建芹祁子严唐崇明张健
Owner SUZHOU QIUSHI HERBAL HEALTH TECH CO LTD