Preparation method of ultramicro mulberry leaf tea powder

A mulberry leaf and ultra-fine technology, applied in the field of preparation of ultra-fine mulberry leaf tea powder, can solve the problems of instability, difficult health-care effect, limited content of active ingredients in tea, etc. Effect of glucosidase activity

Inactive Publication Date: 2010-08-11
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although a certain amount of active ingredients can be soaked by boiling water, due to the limitation of soaking time and boiling water temperature and other factors, the content of active ingredients in tea water is limited and unstable, and it is difficult to play a stable and good health care effect.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

example 1

[0036] Take 500kg of mature mulberry leaves in spring and spread them in a ventilated place with a thickness of no more than 10cm. 2 hours before finishing, 1% concentration of green protection agent is evenly sprayed on the leaves, and kept for 30 minutes, and the green protection treatment is carried out on the mulberry leaves. Finish with a drum fixer. Subsequently, directly use the leaf beater to break the leaves into pieces, and ventilate and cool down simultaneously. Knead in the order of "light-heavy-light", the time is: 10min, 25min and 10min. After kneading is completed, deblocking is carried out. Then dry the mulberry leaves after kneading with hot air drying. The drying temperature should be controlled at 120-130°C until the water content of the mulberry leaves is less than 5%. The dried mulberry leaves are moderately crushed with a pulverizer, and petioles and veins that are not easily broken are screened out. Then pulverize the mulberry leaves to less than 10...

example 2

[0041] Take 500kg of mature mulberry leaves in autumn and spread them in a ventilated place with a thickness of no more than 15cm. Use a steam fixer to fix the greens, the temperature is controlled below 95°C, the fixation time is about 20s, and the whole fixation process is about 3 minutes. After finishing and unblocking, knead in the kneading machine according to the order of "light-heavy-light" for 10min, 25min and 10min. Deblock the mulberry leaves after kneading, dry them with microwave drying method, and firstly treat them for 3-4 minutes to reduce the water content of the mulberry leaves to about 30%, spread them out, regain moisture, and then continue to use microwave treatment for 2 minutes to reduce the water content of the mulberry leaves to about 30%. down to less than 5%. After the dried mulberry leaves have petioles and veins removed, they are ultrafinely pulverized to a size below 10 μm in a superfine pulverizer (such as CZJ self-grinding superfine pulverizer)....

example 3

[0046] This example adopts the processing step identical with example 2, and wherein different process conditions are: in the mixing step, earlier mulberry leaf superfine powder and Nojirimycin crude product are fully mixed by the mass ratio of 8.7: 1.2 with V type mixer, Then the mixture is fully mixed with the ultrafine tea powder at a mass ratio of 6:4 to obtain the ultrafine mulberry leaf tea powder; the Nojirimycin mass content in the Nojirimycin crude product is 11%; other process conditions and examples 2 agree.

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PUM

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Abstract

The invention relates to the preparation of tea and aims to provide a preparation method of ultramicro mulberry leaf tea powder. For obtaining ultramicro mulberry leaf powder and ultramicro tea powder, the method comprises the following steps of: selecting raw materials, killing out, kneading, drying, primarily crushing and ultromicro crushing; sufficiently mixing ultramicro mulberry leaf powder with a nojirimycin crude product with a V type mixer, and sufficiently mixing the mixture with ultramicro tea powder to obtain the ultromicro mulberry leaf tea powder, wherein the weight content of nojirimycin in the nojirimycin crude product is 10-12 percent; and finally packing. For the ultromicro mulberry leaf tea prepared by the invention, ultromicro crushed to obtain the grain size less than 10 mum, the powder can be sufficiently suspended in hot water and can be completely taken, thereby the health care and nutritious value of the mulberry leaf are fully exerted. The nojirimycin crude product is added in the ultramicro mulberry leaf tea powder so that the activity of alpha-glucosidase can be more effectively restrained, glucose entering the blood is reduced, and the blood sugar is reduced. The invention can be used for health care or auxiliarily treating diabetes.

Description

technical field [0001] The invention relates to a method for preparing tea, in particular to a method for preparing ultrafine mulberry leaf tea powder using mulberry leaves, mulberry leaf extract (nojirimycin) and tea leaves as raw materials. Background technique [0002] Mulberry leaf is the leaf of the Moraceae (Morus alba L.) plant, is the main product of the aboveground part of the mulberry tree, and can be picked many times a year. The medicinal and health benefits of mulberry were discovered in ancient my country. It is recorded in "Compendium of Materia Medica" that mulberry leaves are the medicine of Yangming, and the juice can be decocted instead of tea, which can relieve thirst, improve eyesight and grow hair. "Materia Medica" records that mulberry leaves taste bitter, sweet, and cold. Sweetness benefits blood, and coldness cools blood. The combination of sweetness and coldness lowers qi and nourishes yin, improves eyesight and quenches thirst, and has the effect o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A23F3/34
Inventor 朱祥瑞
Owner ZHEJIANG UNIV
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