The isoelectric point is an important foundation in influencing the surface activity of gelatin. If

In producing or making food many additional ingredients that are used to improve the quality of the food, both in terms of taste, texture, and color. Examples of the additives include Monosodium Glutamate (MSG), a coloring foam seat cushions agent, foam seat cushions gelatin, and so forth. The additional substances exist naturally derived, for example dyes from pandan leaves, and some are obtained through a chemical process in advance, for example MSG.
For additional substances that are naturally possible negative impact not so much. The views of these natural additives usually foam seat cushions only kosher or not the source of these substances. While the chemical processes in advance have a negative impact more and need a dose / dose maximum usage.
But there is also a natural source additional substances through a chemical process first. For example gelatin. Gelatin is derived from animal bones treated with a chemical solution until the solution thickens and contains gelatin.
Gelatin is a kind of protein that is extracted from the collagen network of the skin, bones or ligaments (connective tissue) animals. foam seat cushions Manufacture of gelatin is an attempt to utilize the waste bones usually unused and discarded at slaughterhouses. The use of gelatin in the food industry is primarily intended to address problems that arise in particular in product diversification.
Gelatin is a protein derivative of existing collagen fibers in the skin, bone, and cartilage. Amino acid composition is similar to collagen, foam seat cushions amino acids dimanaglisin as primary and is 2/3 of the entire amino acid yangmenyusunnya, third remaining amino acids proline and hydroxyproline filled by (Chaplin, 2005).
Molecular weight gelatin foam seat cushions average ranged from 15000-250000. MenurutChaplin (2005), gelatin molecular weight of about 90,000, while the average foam seat cushions commercial gelatin beratmolekul ranged from 20,000 - 70.000Gelatin divided into two types based on differences prosespengolahannya, namely type A and type B. In type A gelatine manufacture, material treatment bakudiberi immersion in a solution acid, this process is known dengansebutan acid process. While in the manufacture of gelatin type B, the treatment is treatment yangdiaplikasikan bases. This process is called alkaline process foam seat cushions (Main, 1997). foam seat cushions
Heavy Metals
In principle gelatin can be made of materials that are rich in collagen such as skin and bone either from pigs or cows or other animals. However, if it is made from the skin and bones of cattle or other large animals, foam seat cushions the process is much longer and require a washing water / neutralizer (chemicals) that much more, so less developed because it requires a big investment so that prices become more expensive gelatinnya.
While gelatin from pigs is much cheaper than other food additives. That's because pigs are bred. Pigs can eat just about anything, including his own son. Pigs can also live under any conditions even very dirty. In terms of growth, pigs were promising. A pig can give birth to twenty children at once. Because it is so easy to develop, products derived from pigs very much. (Www.republika.co.id / infohalal)
Gelatin is soluble foam seat cushions in water, acetic acid and alcohol solvents such as glycerol, propylene glycol, sorbitol and mannitol, but not soluble in alcohol, acetone, karbontetraklorida, benzene, petroleum ether and other organic solvents.
According to Norland (1997), soluble gelatin at a temperature of 71.1 C and tends to form a gel at a temperature of 48.9 oC. Meanwhile, foam seat cushions according to Montero, et al. (2000), heating to dissolve gelatin dilakuka at least 49oC or usually at a temperature of 60-70oC.
Gelatin has to change is reversible nature of the sol to form a gel, swell or expand in cold water, can form films, affects the viscosity foam seat cushions of a material, and can protect colloidal systems (Parker, 1982). According to Main (1997), the properties like that that make gelatin lebihdisukai compared with materials such as xanthan gum, pectin keragenandan.
Surface properties of gelatin based on the fact that the side chains of gelatin, foam seat cushions as well as other proteins, has charged the group and the specific part of a series of collagen-containing hydrophobic and hydrophilic amino acids.
Hydrophobic and hydrophilic parts can move on the surface, thus reducing the voltage-face solution. At the same time, protects the gelatin foam seat cushions to own some of the properties of the molded surface stability. Multifunctional properties of gelatin is used in the production and stabilization of foam and emulsion.
The isoelectric point is an important foundation in influencing the surface activity of gelatin. If the pH around the isoelectric point of gelatin relating to, gelatin becomes charged, if the pH is more tinggimaka will be negatively charged and positively charged if lower. In a solution g