IntroductionThe process uses high pressure is a food that begins with the application to food processing. As a commercial food processing without using heat (non thermal processing), but using a pressure higher than atmospheric pressure, so much to destroy the microorganisms that cause the risk of microbial disease (microbial spoilage), construction (pathogen) in addition, pressure to destroy the enzymes that cause the damage of the food. Make food with a long shelf life to shit Green. Effect comparable to food processing with heat (thermal processing) level of pasteurization (pasteurization), but because the temperature of the food. Very little increase in reduces the loss of food quality due to heating of food coloring to make safe treatment. The smell and texture of the food. Compared with the use of heat.There are currently manufactured and processed food products, using this process and successful trade are as follows:• Ready to eat food (ready to eat).• The food categories that are acid (acid foods), such as jam, yogurt and soft drinks like fruit juice.• Sea food like shells, Mrs. LOM (oyster).Especially in Japan, which is a country and nation, and to stimulate the research and development of food products by using high pressure for more food and widely to various countries. Many countries such as the United States and countries in Europe: France and Germany Sweden United Kingdom. That has included research and study group for high pressure processes used in food processing and preservation.The process uses high pressure to food processing and food industry trade terms. Multiple branch of science must be together in food science and technology, such as food chemistry, food microbiology, and engineering know-how to get food products with good quality plophai safe and efficient in production.The use of high pressure it must be used in the initial budget investment, but rather found that will give good returns in the long run because this is a clean technology. Do not pose the environmental impact and the product that has gone through this and close to nature.History of high pressure in the treatment of food processing and preservation.The use of high pressure technology. Originating from the use of high pressure in the manufacturing of steel and ceramics (ceramics), soup poean Lloyd (superalloys) and began to be used for food later. Study on the effect of the high pressure here microorganisms from the 20th century to use the pressure to extend the shelf life milk, and after 15 years of research study in the subject countries France the effect of high pressure against bacteria and found that the use of high pressure 600 MPa can destroy the cell capacity Li not.Series (vegetative cells), however, research on the use of high pressure technologies is not yet very interesting until 1980 a.d. during the year. Therefore, this technology is the research once again by the United States and Japan in the countries in Europe and then was sell the products through processing by applying pressure for the first time in the country of Japan in the year a.d. 1990.The principle of using a high pressure process on food processing and preservation treatments.Effect of high pressure here microorganismsThe result of the pressure to destroy microbes-Most bacteria can thrive at pressures between 200-300 atm best microbial growth can be at a higher pressure, 400-500 atm called barophiles high pressure intermediate (between 300-600 MPa) can destroy (vegetative cells) of wall destroyed by high pressure cell (cell wall), and the cell membrane (cell membrane), q o waek (vacuoles) within different cells.Effect of high pressure on physical changes of microbes, including stopping the movement (cessation of motility) bacteria at most stops the movement when the continuous pressure at 200-400 atm pressure, for example, 100 E. coli found that atm, Vibrio and Pseudomonas are still Flagstaff j Villa (flagella), but when the pressure is increased to 400 atm, it was found that these infections will lose organs and in some kinds of bacteria found to be back at it again.Bacteria that are resistant to high pressure, log phase, will be less destructive. The cell is stationaryphase of bacterial spore phase and death phase (bacterial spore).High pressure medium with growth rate and the propagation of microorganisms decreased. Best very high pressure to destroy microbes. The size of the high pressure that can inhibit the reproduction and growth will have a different value depending on the type and speed CZ. (Species) of microorganismsDestruction of bacteria sporeTransport of bacteria (bacterial spore) contamination in food can be done by the use of heat (thermal processing), but it will be the quality of food is. Various aspects of products falling On the other hand, it was found that at low temperatures. Spore destruction rate will increase when high pressure increases.Using high pressure to destroy the spore discovered that the temperature has a very important role. Other factors that affect second and water at pH values principles video (water activity) by the appropriate temperature for the start of regeneration, transport will vary according to the level of high pressure, and inhibition of seed germination of the spore is better when pH is a powerful medium and minimum values when the pH value is too high or low. For a break, is not to be dissolved with water up the io concepts video with low effect on BC to inhibit transport with high pressure.Effect of enzymatic reaction against high pressure.Loss of enzyme activity, because of the high pressure caused by high pressure within the molecular structure (intramolecular structures) has changed. The use of high pressure between 1000-3000 atm to inhibit certain enzymes may find that the night activities (reversible) lactate dehydrogenase in Bacillus stearothermophilus, for example, depending on the level of the enzyme molecule structure changes, and if the pressure exceeds 3000 atm to restore activity during storage or transport, while the conveyor is born.The results of the biochemical reaction against high pressureEffects of high pressure on the system, including making biological proteins lose the natural environment (protein dena.
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