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1、益生素的作用机理及其在饲料中的应用（The action mechanism of probiotics and its application in feed）The action mechanism of probiotics and its application in feedXu Jingjin College of food science, Wuxi Light Industry University1989 Fuller to the definition of probiotics is: a passIt can improve the balance of intesti
2、nal flora of host animalsEffects of active microbial feed additives. According to the set of probioticsRighteousness, its products must have the following two characteristics: 1) contains live microOrganisms: 2) through the mouth, gastrointestinal tract, upper respiratory tract, or urinary tractPlay
3、 a role in the reproductive tract and improve human or animal health.The mechanism of 1 probiotics111, the hypothesis of nutrient competition and competition is based on a systemOn the basis of column experimental observations, experiments show that population control mechanisms are associated withT
4、he principle of a chemical constant is the same as that of a chemical constantThe basic principle is that the bacteria in the continuous flow culture are most competitiveBasic growth substance. In 1983, Freter proved that when the large intestine was takenThe bacilli were inoculated on the mouse col
5、on flora and then cultured continuouslyTheir propagation is greatly inhibited in the filtrate.In the 112 binding site competition theory, the pathogen will be washed outThe intestinal tract, therefore, is the ability of the pathogen to adhere to the mucous membraneDeterminants of successful intestin
6、al colonization. 1985 KennedyAnd Volz in the study found that when rats were fed penicillin,Large amounts of Candida albicans and intestines are found in their gut contentsThe mucosal surface also adhered to large amounts of Candida albicans. Not fedPenicillin contained only a small amount of intest
7、inal content and mucosal surface in ratsCandida albicans. Penicillin reduced the cecal adhesion to miceThe mucous layer of spindle like bacteria, which releases some attachment sites, is thisSome of the released loci were immediately occupied by Candida albicans.113 metabolites tested in 1986, Que s
8、howed resistanceThe content of acetic acid, propionic acid and butyric acid could be obviously reduced by biotin. testFirst, the same pathogen was inoculated with penicillinOn and untreated animals, and made a growth curve. By the songAs you can see on the line: penicillin has been used to treat pat
9、hogens in moving objectsThe growth rate and quantity are far greater than those of untreated animals. ThePenicillin treated pH and volatile lipids in animal gut contentsFatty acid concentration adjusted to the same level with untreated animal hair.The growth curve of the adjusted content now is not
10、even with penicillinThe treated animals are exactly the same. The above test results show that the waveThe FA plays a protective role in the invasion of intestinal tract by pathogenic bacteria.114 activating immune function in 1979, Bloksma fed with yogurtAxenic animals were found to have immunoglob
11、ulins G1, G2a, and G2b in their bodiesThe content is greatly improved. Another test showed that Lactobacillus caseiIt can increase the activity of macro macrophage. Unless the antibodies are secreted in the stomach and intestinesOtherwise, its role will not affect the gastrointestinal flora. Cheese
12、milkLactobacillus can induce immunoglobulin A secretion and immunoglobulinThe activation of A will affect the composition of the gastrointestinal flora and thus prevent itColonization of microorganisms in the intestinal tract. The immune system acts only inAbsorption of soluble antibodies or cell tr
13、anslocation through the gastrointestinal wallBlood lymphocytes are produced. 1986 on human bloodAn in vitro test of liquid lymphocytes proved that a small amount of yogurt could be usedInterferon production is increased by activating T cells.Study on the dynamics of 2 probioticsStudy on foreign prob
14、iotic rise in 1970s.Theoretical research focuses mainly on the mode of action and mechanism,Production research focuses on the selection of fine varieties of microorganisms. along withA study on Mechanism of probiotics deeply, researchers are forceSeeking genetic engineering to produce semi permanen
15、t intestinal colonization is beneficialStrains. In addition to the preservation and processing of probiotic productsIn addition, many studies have been carried out to maintain cell viability.Screening 211 strains of probiotics is developed.Key. But because the probiotic mechanism is still not completely clear,thereforeScreening of probiotics bacterial composition, lack of unified standards.The United States Food and drug administration has published one that was deemed acceptableA list of 42 direct feed and safe microbial species. dayThe
