Classification of the fat

Classification of the fat
The fat is divided into: Neutral fat LipoidNeutral fat: It has three lipoprotein that sweet, it is lard, peanut oil, soya-bean oil, vegetable oil, the principal ingredients of sesame oil. Lipoid: Point phosphatide, cholesterol, and lipoprotein,etc.
3 hydroxyls of glycerine and 3 esters that fatty acid molecule dehydration formed after condensing. Aninals or plants' cells store the main form of the lipoprotein. Abbreviated as fat, three acyl glycerine of scientific name. Three acyl glycerine at room temperature ( 25 ) The person who presents solid state is called the lipoprotein; The persons who present liquid state at room temperature are called the oil. Fat principal ingredients to make up food one of, still can be used for making soap, candle, coating, paint,etc.; Used as excipient and medicine,etc. medicine. Three the intersection of acyl and glycerine have a lot of different type, the intersection of fatty acid and different and fatty acid that difference's lying in include between the they position not accounted for arrange the difference in the intersection of glycerine and molecule. If 3 pieces of fatty acid are the same, are called simple three acyl glycerine. The overwhelming majority is three acyl glycerine mixed, namely contain three acyl glycerine of two or 3 kinds of different fatty acid. If 3 hydroxyls of glycerine are esterified by 3 kinds of different fatty acid, then a carbon atom in the middle of the glycerine molecule is asymmetric carbon atom. This kind of three acyl glycerine may a L type and D type two pieces of antimer. Three acyl glycerine of the natural fat is L type. The oil changes in the air gradually. The drying oil absorbs oxygen and gets together and forms a layer of protective membrane rapidly. Half drying oil absorb oxygen to be slower and more thick to take. Non- drying oil such as olive oil are difficult to oxidize in the air, but the change takes place gradually, produce stench, is called the acid and frustrated the phenomenon. The acid is frustrated because the oil is oxidized slowly, hydrolyze and become free fatty acid first, then oxidize and produce oxides, and then resolve into aldehyde, ester, alcohol, ketone, acid and compound including hydroxyl of many kinds of low molecular weight, among them some have stimulating stench. Middle and hydrogen that free fatty acid consumes in a gram of oil is oxidized the potassium milligram and counted and called acid value.Fat deal with or use alkali as catalyst (such as caustic alkali, caustic of the alkaline-earth metal) under high pressure in water Deal with at low temperature, can hydrolyze and produce free fatty acid and glycerine. The response that alkali and fatty acid arises is called the saponification. Hydrogen that the complete saponification of a gram of oil consumes is oxidized the potassium milligram and counted and is called the saponification value. It can be with protective action that the fat stores the organism. In addition making the soap, make wax, employ extensively too on medicine.

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