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Intermolecular interaction
A molecule is a system consisting of a positively charged nucleus and negatively charged electrons, with molecules interacting with each other due to the interaction of charges. A molecule's charge distribution can be balanced so that the positive charge center and the negative charge center together, so that there is no permanent dipole and become non-polar molecules, such as carbon dioxide and methane; if the two centers do not coincide, an electric dipole is created and becomes a permanent dipole.
03-25
What are functional oils?
Functional oils are a class of oils with special physiological functions, which are a large class of fat-soluble substances that are needed for human nutrition and have a promoting effect on human health. Functional oils and fats include oils and fats such as triglycerides, etc., as well as other nutrients such as VE, phospholipids and other lipids. At present, functional oils mainly include linoleic acid, linolenic acid, arachidonic acid, eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), as well as lecithin, cephalin and inositol phospholipids. In addition, some new structured lipids, fat-modified products and fat substitutes can also be included.
What is carotenoid and its origin course
Auxiliary pigment (accessory pigment): In plants and photosynthetic bacteria, such as the carotenoids lutein and phycobilin, a pigment that absorbs visible light and supplements the capture of light by chlorophyll. Unsaponifiable lipids. It is a group of yellow, orange, red or purple pigments widely distributed in animals and plants. The conjugated double bond constituting the cause of color development has a long-chain polyolefin structure. Usually several are mixed together. There are more terpene structures with C40 and no nitrogen. It is known that there are about 300 kinds of natural carotenoids, among which the hydrocarbon classes without oxygen include carotene, mycopelin, etc. There are many oxygen-containing ones, such as alcohols, ketones, ethers, aldehydes, epoxides, carboxylic acids and esters, etc. Among them, there are a large number of fucoxanthin (fucoxanthin), lutein (lutein), cordioxanthin (violaxanthin), new xanthin (neoxanthin), etc., all belong to carrot alcohol. Most carotenoids are insoluble in water, soluble in lipid solvents, unstable and easily oxidized.
The role and efficacy of seaweed extracts in cosmetics
First, let's take a look at how seaweed extract is made. Simply put, seaweed extract is an active ingredient extracted from various marine plants. These marine plants include seaweed, seaweed, kelp, etc. Because marine plants grow in a special marine environment, they are rich in vitamins, minerals and other nutrients.
What are the types of polysaccharides
Typical polysaccharides such as: starch, cellulose, glycogen. Polysaccharides are classified according to their sources: 1. Plant polysaccharides, water-soluble polysaccharides, such as extracted from Chinese medicinal materials: Angelica polysaccharides, Lycium barbarum polysaccharides, water-insoluble polysaccharides, such as starch, cellulose, etc. 2, animal polysaccharide, isolated from animal tissues, organs and body fluids, purified polysaccharide "water-soluble mucopolysaccharide" heparin, chondroitin sulfate, hyaluronic acid, pig placenta lipopolysaccharide, etc. 3. Microbial polysaccharides, lentinan, tuckahoe polysaccharides, tremella polysaccharides, polyporus polysaccharides, and Coriolus versicolor polysaccharides "have significant effects on tumor treatment and immune regulation. 4, marine biological polysaccharide ", from the ocean, lake biological separation, purification of polysaccharides. "Chitin (chitin, chitin), spirulina polysaccharide.
Concept of fermentation technology
The use of microorganisms in food fermentation, the use of bacteria in fermented food 1, lactic acid bacteria fermentation lactic acid bacteria distribution: in the air, meat, milk, fruits and vegetables and other food surface water and utensils and other surface types: spherical, rod-shaped and so on, belong to the majority of both gas, but also exclusively gas
