Extraction method of glucan in fig leaf

Abstract

The invention relates to an extraction method of glucan in a fig leaf. The extraction method is characterized by comprising the following steps of: cleaning and rubbing a collected fresh fig leaf, and then, adding water to mill the fig leaf into thick liquid by using a colloid mill, afterwards, feeding the thick liquid into an ultrasonic reaction kettle, adding 5-8 times of water, carrying out ultrasonic processing for the ultrasonic acting time of 3-5 hours at a constant temperature of 45-55 DEG C, and finally, preparing the glucan through process steps such as centrifugation, concentration under reduced pressure, alcohol precipitation and vacuum drying, and the extraction method can further adopt the following steps of: adding 7-9 times of water in mass to redissolve after the alcohol precipitation, carrying out ultrafiltration by a membrane with a molecular interception amount of 10000, subjecting an intercepted solution to the concentration under reduced pressure again, and then, carrying out freeze drying on the intercepted solution to obtain beta-glucan with better activity. The extraction method is simple in process; the production cost is low; extraction conditions are mild; the pollution does not exist; the purity is high; the effective value-added utilization of the fig leaf is realized; the abundant abandoned fig leaves are changed from the waste into the valuable things; the market development prospect of the extraction method is wide; and the meaning is significant.

Description

technical field [0001] The invention belongs to the technical field of food and medicine processing, and in particular relates to a method for extracting glucan from fig leaves. Background technique [0002] In the 21st century, scientists have discovered that sugar plays a more important role in living organisms than protein, especially in the field of biomedicine. Polysaccharides can serve as very good drug carriers, and are vividly called "biological missiles" by scientists. In polysaccharide products, dextran occupies an important position, and the core substance of polysaccharides in natural medicine is dextran. [0003] Dextran is usually a variety of naturally occurring blood polysaccharides or polydextrose, including polymers such as cellulose, amylose, glycogen, laminarin, starch, etc., dextran contains branched and unbranched chains, composed of 1 Glucose connected by →3, 1→4, and 1→6 glycoside chains. The glycoside chains can be α and β types. It is a macromolecu...

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Problems solved by technology

[0004] The amount of fig planting in my country is increasing year by year, and a fig planting base with considerable advantages has been formed. Its fig leaf resources are relatively rich, and the scientific and timely picking of fig leaves has little effect on the original plants. However, a large number of fig leaves are currently discarded and cannot be developed and utilized. , there is no report of extracting dextran from fig leaves