What bacteria are beneficial and what are the beneficial bacteria

Bacteria have historically been regarded as the bane of disease. In fact, some bacteria are not only harmless, but actually beneficial.

Bacterial weeding After years of research, Japanese scientists have found a herbicidal fungus. It grows on weeds as spores, and through rapid reproduction, the weeds wilt and die. However, it is harmless to humans, animals and rice plants, and will not pollute the environment.

Antifreeze bacteria American scientists get a type of antifreeze bacteria after denaturing bacteria. This bacterium protects against frost and freeze damage to fruit and tuber crops. Experiments have shown that this bacterium can protect crops from frost damage when they are below 0.

Bacterial preservatives American scientists have isolated a strain from yeast and bacteria that prevents fruit and vegetables from rotting. Tests on apples and pears that had developed rot showed that the untreated fruits were extensively rotten, while the fungug-treated fruits were unharmed.

Bacterial Sugar There is a large sugar mill in the United States that uses neither sugar cane nor sugar beet, but a thermophilic bacterium. This bacterium specializes in "digesting" various cellulose, such as waste paper, and produces an odorless, granular synthetic protein or glucose, producing 50 kilograms of sugar for every 100 kilograms of waste paper "digested". The bacteria also "digest" the cellulose in cow dung, turning it into protein feed for animals.

Fibrous bacteria American scientist Brown discovered a bacterium that produces cellulose under photosynthetic conditions. The fiber produced is longer than ordinary plant fiber, and has a firmer and softer texture. Cloth woven from this bacterial fiber is better than cotton and linen fabric.

Garbage bacteria There is a garbage treatment plant in Germany that treats garbage by placing a bacterium that does not require oxygen in the garbage, which separates the waste and produces a gas similar to acetylene that can be used as fuel.

Bacteriological Plastics A chemical company in the United States has recently invented a new method for producing plastics directly from bacteria. The plastic produced by this method is not only clean and transparent, but also very soft, and is used to make agricultural mulch film, which will dissolve itself after a certain period of time, not only will not cause pollution, but will increase the organic matter in the soil.

Bacteria Cure American scientist Scheerer discovered a refrigeration bacterium that can quickly cool the body surface temperature below 0 in 2 minutes and 3 minutes. The coolant prepared by it is applied around the wound to reduce the temperature of cells and tissues, prevent inflammation and promote wound healing.

Good bacteria: Bifidobacteria.

Lactobacillus plantarum.

Lactobacillus bulgaricus.

Bacillus subtilis.

Bacillus licheniformis.

Bacillus natto.

1. Active lactic acid bacteria.

It can make beneficial changes in the composition of intestinal flora, improve the function of the human gastrointestinal tract, restore the balance of human intestinal flora, form an antibacterial biological barrier, and maintain human health.

Lactic acid bacteria produce lactic acid through metabolism in the intestines, which can inhibit the growth and reproduction of harmful bacteria, * intestinal peristalsis, increase fecal water content, moisten the intestines, and it also has a significant effect on ulcers, diarrhea, diarrhea and constipation.

2. Bifidobacteria.

Bifidobacterium is a gram-positive, non-motile, rod-shaped, sometimes bifurcated at one end, strictly anaerobic bacterium that is widely found in habitats such as the digestive tract, *, and oral cavity of humans and animals.

Bacteria of the genus Bifidobacteria are one of the important components of the intestinal flora of humans and animals.

Some strains of Bifidobacterium can be used as probiotics in food, medicine and feed.

It has a variety of important physiological functions such as biological barrier, nutritional effect, anti-tumor effect, immune enhancement effect, improvement of gastrointestinal function, and anti-aging to human health.

3. Lactobacillus plantarum.

Lactobacillus plantarum has many health care effects, as follows: has a certain immunomodulatory effect; It has an inhibitory effect on pathogenic bacteria; Lowers serum cholesterol levels and prevents cardiovascular disease; Maintain the balance of intestinal flora; Promotes nutrient absorption; alleviate lactose intolerance; Inhibits the formation of tumor cells, etc.

4. Lactobacillus acidophilus.

Lactobacillus acidophilus is found throughout the gastrointestinal tract of the human body"From top to bottom"Regulate the microecological environment.

down"It means that in the large intestine, they can also release substances that are beneficial to the growth of other probiotics such as bifidobacteria, increasing the number of probiotics in the large intestine and enhancing their vitality.

5. Lactobacillus bulgaricus.

The lactic acid bacteria in Bulgarian yogurt belong to Lactobacillus delbrueckii in terms of classification, and are named by microbiologists as Lactobacillus delbrueckii subsp. bulgaricus (referred to as Lactobacillus bulgaricus) because of its origin, microbial characteristics, and excellent efficacy.

In the experiment, it was found that the yogurt fermented by Lactobacillus bulgaricus, Lactobacillus acidophilus, and Streptococcus thermophilus had inhibitory effects on cancer cells in experimental animals.

Lactic acid bacteria, yeast, Pediococcus beeriae, Saccharomyces cerevisiae, Streptococcus lactis, etc.

1. Lactic acid bacteria:

Lactic acid bacteria (lab) are a general term for a class of bacteria that can produce large amounts of lactic acid from fermentable carbohydrates. This type of bacteria is extremely widely distributed in nature and has a rich species diversity, including at least 18 genera and a total of more than 200 species. Except for a very few, most of them are essential microflora in the human body and have important physiological functions, which are widely present in the human intestine.

Lactic acid bacteria are not only ideal materials for the study of classification, biochemistry, genetics, molecular biology and genetic engineering (which have important academic value in theory), but also have high application value in important fields closely related to human life such as industry, agriculture and animal husbandry, food and medicine.

2. Yeast:

Yeast is a single-celled fungus and is not a unit of phylogenetic classification. A tiny single-celled microorganism invisible to the naked eye, which can ferment sugar into alcohol and carbon dioxide, distributed throughout nature, is a typical heterotrophic facultative anaerobic microorganism, can survive under aerobic and anaerobic conditions, and is a natural starter culture.

Dry yeast powder or granular products that do not have fermentation power and are intended for human consumption. It can be obtained by yeast puree from breweries, or specially cultivated and dried for human nutritional requirements. In the United States, Japan and some European countries, common food products such as bread, cakes, biscuits and scones are mixed with about 5% edible yeast powder to improve the nutritional value of food.

3. Saccharomyces cerevisiae:

Saccharomyces cerevisiae belongs to the yeast family, is a single-celled organism, oval or spherical, the mode of reproduction is budding reproduction, spore reproduction, conjugation reproduction, simple form but complex physiology, industrial use for winemaking.

4. Pediococcus beer:

Pediococcus ae, a type of probiotic, is found in spoilt beer and brewer's yeast.

Pediococcus aenificus (cells globular in shape, diameter. Acid production from maltose does not produce gas. Dimethyldione can be produced, and the peculiar smell in spoilage beer is related to this ingredient.

The optimum growing temperature is 25 and does not grow at 35. Lethal temperature 60 10min. Highly resistant to hop preservatives.

It can be grown at the time, and the optimal pH is about.

5. Streptococcus lactis:

Streptococcus lactis a morphological streptococcus with a diameter of microns, which is double-spherical, short-chain or long-chained, and generally double-spherical. Gram reaction is positive. Gelatin puncture culture grows in a linear manner and does not liquefy.

Streptococcus lactis is a strongly reduced strain with a white, smooth, shiny colony morphology and a diameter of 1 2 cm.

There are three main types of bacteria used in fermented foods: acetic acid, non-pathogenic corynebacterium and lactic acid bacteria.

It is beneficial to our blood, heart, and other bacteria that cause the disease from A to V. The tonsils that we commonly see here will have Streptococcus A series, which is beneficial to the human body. When the immunity is low, the A series will multiply in large numbers, which can cause tonsillitis, infections, colds, etc.

Therefore, streptococci are beneficial, but can also cause disease if the microbiosis is out of balance. So there is no absolute boundary between this beneficial and pathogenic one. Again, there are many bacteria in the human body that are beneficial, and in the case of some conditions change, or in the case of disorder, some bacteria that were originally beneficial to us become harmful to us.

A lot of bacteria are harmful to us, just get in. Only a part of the bacteria is good for us, like E. coli and so on to help us digest, some mold and so on, or some saliva can help with digestion. However, in some specific cases, beneficial flora can multiply and cause harmful conditions.