Apple bleached lac composite antistaling agent

Abstract

The invention provides apple bleached lac compound preservative which is characterized by consisting of raw materials in the following mass percent: 5 percent to 30 percent of bleached lac solution, 5 percent to 15 percent of eucalyptus leaf extract, 10 percent to 20 percent of galanga extract, 10 percent to 20 percent of Chinese cinnamon extract, 5 percent to 15 percent of forsythia extract, 20ppm to 100ppm of gibberellin, and the rest is water. After the preservative is used to preserve the freshness of apples with coating, the apples can be stored under normal temperature without any refrigerating equipment for 90 days, the commercial rate reaches 90 percent, the water loss rate is equal to or less than 10 percent, the flavor and the taste are basically unchanged; the preservative of the invention not only effectively inhibits the water loss of apple fruit, reduces the respiration strength, delays the maturity of the fruit, but also inhibits plenty of rot because of pathogenicbacteria and spoilage organisms; in addition, the membrane formed by the bleached lac on the surface of the fruit improves the appearance of the fruit and improves the commodity value.

Description

technical field [0001] The invention relates to a fruit fresh-keeping agent, in particular to an apple bleached shellac fresh-keeping agent, which belongs to the technical field of crop fresh-keeping. technical background [0002] The fresh-keeping method of fruit coating is widely used because of its simple manufacturing technology, low cost of use, and no need for large equipment investment. The key component of the film preservative is the coating agent. Due to the use of chemical coating preservatives, toxic substances will remain and cause harm to human health, and even toxic damage events such as carcinogenicity, teratogenicity, and mutagenicity. environment. Therefore development and research natural preservatives have become an inevitable trend in the development of fresh-keeping technology. At present, the natural film materials used at home and abroad mainly include: proteins, polysaccharides, lipids and their complexes. Protein films form disulfide bonds betwe...

AI Technical Summary

Problems solved by technology

Protein films form disulfide bonds between molecules to form a three-dimensional network structure. Many research results show that protein films are commonly used for soybean protein, gluten protein, zein and collagen. Although they have good oxygen barrier properties, However, the water-blocking and moisturizing properties are poor, and it is easy to dehydrate the fruit; the commonly used polysaccharide natural coatings include modified starch, modified cellulose, chitosan, konjac glucomannan, etc. This type of natural coating usually has Good mechanical properties and transparency. Among them, chitosan film has inhibitory effect on many microorganisms, but because the macromolecules of polysaccharides have certain hydrophilicity, they also have relatively high water vapor permeability and low water retention. Poor; lipid components include vegetable oil, fatty acid and its monoglyceride, beeswax and surfactant, etc.

The films formed with them have good water resistance, but the mechanical properties of the films are very low, and generally cannot be used alone

In addition, most of these natural substances are rich in nutrients. When coating fruits and vegetables to preserve freshness, they will also become a good medium for microbial growth, thereby accelerating the mildew and decay of fresh-keeping samples.