Extracts are liquid or solid natural active ingredients extracted from animal or plant raw materials. Plant extract is a product made from plants. It is formed by physicochemical extraction and separation process according to the needs of use of the extracted final product, and directed acquisition and concentration of one or more active ingredients in the plant without changing the structure of the active ingredients.
Extracts are liquid or solid natural active ingredients extracted from animal or plant raw materials. Plant extract is a product made from plants. It is formed by physicochemical extraction and separation process according to the needs of the use of the extracted final product, and directed acquisition and concentration of one or more active ingredients in the plant without changing the structure of the active ingredients.
Because of its low drug resistance, plant extracts are not prone to additive residues and certain toxic side effects, and have extremely high edible safety. In recent years, the research and development of functional food and beverages using plant extracts as raw materials has become a research hotspot in various countries.
How are plant extracts classified?
According to different properties, it can be divided into vegetable oil, extract, powder, lens, etc.; according to function, it can be divided into growth promoter, immunomodulator, antioxidant, flavoring agent, deodorant, antifungal agent, product quality improver, etc. According to the different components of the extract, it is divided into alkaloids, flavonoids, polysaccharides, glycosides, volatile oils, organic acids and other compounds.
Main ingredients of plant extracts
Are plant extracts food additives or food?
Currently, there is no uniform regulation in the United States for the use of plant extracts as food materials, and some substances are regulated in different forms. Some plant extracts can be used as food additives. According to their functions, they can be divided into:
(1) Antioxidants: rosemary extract, tea polyphenols, licorice antioxidants, etc.
(2) Natural flavors: clove bud tincture, bay leaf extract, ginger extract, licorice extract, aloe extract, etc.
(3) Coloring agent: beet red, caramel color, curcumin, chili red, citrus yellow, etc.
(4) Sweeteners: thaumatin, stevioside, mogroside, etc.
What are the research directions of plant extract products?
At present, the research direction of plant extract industry has the following four trends:
With the development of science and technology and the expansion of the field of plant research, scientists have discovered many new plant resources and functional ingredients that are beneficial to the human body. The industrialization of these research results and the development of new plant extract products are the direction of continuous research in the industry.
(2) Research and development of new technology
The plant extract industry is an emerging industry with a relatively high technological content. The technological content of the extraction process determines the quality of the extract product to a large extent. The technological level is a key factor in determining the competitiveness of natural plant extract products. Continuously improving and developing new processes, increasing the extraction rate, improving quality, reducing costs, and improving product technical and economic indicators.
(3) Research and development of natural active monomer components
Because the plant extract monomer has a precise structure, stronger effect, higher price and higher efficiency, the technical development direction of natural plant extract products is to extract and separate effective active monomers.
(4) Research and development of natural health functional products
As the concept of natural and healthy consumption gradually gains popularity, the market has shown unprecedented enthusiasm for health foods, beverages, cosmetics and other products added with plant extracts. The development of such products is also the research direction of the plant extract industry.
The Naming and Characteristics of Restriction Endonucleases
Restriction enzymes, also known as restriction endonucleases, are enzymes that cut double-stranded DNA. Its cutting method is to cut the bond between the carbohydrate molecule and the phosphoric acid, and then create a nick on each of the two DNA strands without damaging the nucleotides and bases.Introduction to Classification and Application of Cellulase
The optimum pH of cellulase is generally 4.5 to 6.5, which acts on cellulose and products derived from cellulose. Microbial cellulase is of great significance in converting insoluble cellulose into glucose and destroying cell walls in fruit and vegetable juice to improve the yield of juice.Which Enzyme Preparations Are Often Used in Fruit and Vegetable Processing?
The so-called fruit and vegetable processing means to maximize the nutrient content of the fruit and vegetable through various processing methods, improve the edible value, and make the color, aroma and taste of the processed product more perfect.