芽孢杆菌属（Bacillus）
芽孢杆菌属(Bacillus)
Bacillus
Cells are straight, rod-shaped, 0.5 to 2.5 m m * 1.2 to 10 mu, often arranged in pairs or chains, with rounded ends or square ends.
Bacillus sp.
Latin name: (Bacillus, Cohn, 1872)
2 morphological description editing cells are straight, rod-shaped, 0.5 to 2.5 mu m x 1.2 to 10 mu m, often arranged in pairs or chains, with rounded ends or square ends. Most of the cells stained in young cultures were gram positive and had flagella with peripheral flagella. Spores oval, oval, cylindrical, round, resistant to many adver environments. Each cell produces a spore, which is not inhibited by oxygen. Aerobic or facultative anaerobic with a v
ariety of physiological properties of heat, pH, and salt. Heterotrophic bacteria with a fermentation or respiratory metabolism type. Usually, the enzyme is positive. Found in different habitats; a few species are pathogenic to vertebrates and non vertebrates.
Type subtilis: Bacillus subtilis (Bacillus).
3 detailed information on the compilation of Bacillus spp. 职称英语考试报名时间 2012
Bacillus
1 genera of the genus Bacillus; Gram-positive bacteria. Producing spores, aerobic or facultative anaerobic, mostly dynamic, without capsule, mostly hemolytic, usually catala positive. G+C molar content in DNA was 32 ~ 62%. The genus includes Bacillus anthracis that is pathogenic to humans and animals, Bacillus cereus causing food poisoning, and nearly 50 species of non pathogenic Bacillus subtilis, Bacillus cereus, and Bacillus cereus. lou
shower是什么意思
sale是什么意思Gram positive bacteria. Producing spores; aerobic or facultative anaerobic. Most powerful,
without capsule, mostly hemolytic, usually catala positive. Bacillus anthracis including pathogenic Bacillus anthracis, food poisoning causing Bacillus cereus, non pathogenic Bacillus subtilis, Bacillus cereus, Bacillus cereus and the like. Bacillus anthracis capsule, no flagella in artificial culture bacteria showed a long chain arrangement, the formation of oval spore; Bacillus bacteria in the central, but not greater than the cell width; aerobic; spore resistance is very strong, can survive for decades in the dry state; the bacteria mainly herbivores dia, dia a sharp, high mortality; the susceptibility of bacteria by only herbivores, broken skin, gastrointestinal or respiratory tract invades the body, high mortality; available antibiotics and sulfa treatment. truelove
4 lactic acid production, a common feature of lactic acid in the genus Bacillus
There are also a number of lactic acid producing bacteria in the genus bacillus, among which are economically important species. For the lactic acid bacteria, Bacillus should belong
to the category of lactic acid bacteria. The common feature of the species is that the ce
lls are rod-shaped and form an endophytic spore. Lactic acid production is usually the same type of fermentation. Most of the contact enzymes were positive.
(two) the species of lactic acid in Bacillus
cxfBacillus subtilis 1.
Bacillus coagulans originally developed by Hammer from canned milk rancidity were isolated and described as a new species. Then from the rancidity of food prervation in isolation of the bacteria, they produce L- lactic acid with high concentration, caud by carbohydrate containing canned food rancidity, which caud the people's attention. For some isolates, differences in the morphology of their cells, spores, and cysts between strains were also obrved in many studies.
superstar是什么意思The highly differentiated polymorphic strains cau many synonyms. Then through some physiological tests and obrved that the strains can be divided into different clusters. Blumenstock from the phenotypic and genotypic characteristics of Bacillus coagcounty
ulans will be divided into two groups. Nakamura and Blumenstock analyzed the phenotype similar to previously identified as Bacillus coagulans strain. The refolding rate of them with UV spectrophotometer for the determination of DNA chain to regroup, get the strains between the similarity values of DNA. The results show that 30 strains were divided into DNA group, which is associated with two. The 1 group of Bacillus coagulans on behalf of another group of strains of Bacillus and
poisonivyrelated species is similar to the DNA values are low, and the phenotypic characteristics of Bacillus coagulans are different, therefore, as a new species, named Smith bacillus (Bacillus smithii).
野兽家园下载2. Smith Bacillus
If the above is the original identified as Bacillus coagulans strain by re classification and the establishment of the. The strains were isolated from milk, canned food, chee, milk sugar beet juice.
3. Bacillus stearothermophilus
Bacillus stearothermophilus rod-shaped cells, usually 0.6-1.0um*2.0-3.5um. Spore ellip, condary end or end, variable size. Gram reaction variable motion. In the gluco medium most strains can grow actively under anaerobic conditions, until the pH is reduced to 5.3-4.8 is not active. A few strains could not grow under anaerobic conditions. Anaerobic fermentation products are mainly L (+) lactic acid, formic acid, acetic acid and a small amount of ethanol, the ratio of 2:1:1. In some strains of nitrate can promote the anaerobic growth and gas production. Some strains had no such effect or reduction to nitrite. The nutritional needs of the lowest significant differences between strains.
