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Long been known the existence and role of peptides in animals, but their action on plants is much less known. A research team from Franco-Hungarian just published in the journal Science the results concerning the role of peptides in the plant kingdom.
Experts have long thought that plant cells peacefully coexisted with bacteria they accommodated: bacteria captured the nitrogen from the atmosphere and transmitted to their host plant, which was then able to grow on poor soil nitrogen , bacteria received in exchange for energy and carbon.
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The Norwegian food company TINE has decided to make extensive studies on bacteria “domestic”, bacteria found on walls and ceilings of the oldest dairies. So far, they were not taken into account in making cheese although they had an influence on his taste. Indeed, it was observed that according to which the dairy product was given a cheese, it was not quite the same taste. In addition, the cheeses are often left eight weeks before being evaluated and sold. Their evaluation is based on their appearance, smell, taste and consistency.
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The same antifreeze proteins that prevent agencies from freezing in cold environments can also prevent ice melt to warm temperatures. This is a new study has revealed.
Antifreeze proteins found in insects, fish, bacteria and other organisms need to survive cold temperatures. These proteins protect organisms by stopping the growth of ice crystals in their bodies.
The new study not only has implications for understanding this process in nature, but also to better understand the process of superheating of crystals in nanoparticles and technologies that use superconducting materials.
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European researchers have discovered a bacterium capable of producing oxygen. This element could thus have been present in the atmosphere long before the onset of photosynthesis.
It was not known in nature as three synthetic pathways of oxygen by living organisms: plants, algae and some bacteria during photosynthesis to produce oxygen from carbon dioxide and water, bacteria consume chlorates (eg ClO4–) And release oxygen, and finally, other bacteria also use free radicals, highly reactive oxidizing molecules from cell metabolism to produce oxygen. French researchers from the CEA, CNRS and Université d’Evry-Val d’Essonne, associated with Holland and German teams, just to find a fourth … that they may well be earlier. This complicates theories regarding the appearance of oxygen on Earth.
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A team from the Department of Microbiology, National University of Ireland Galway in Ireland has shown that the use of disinfectant made the bacteria resistant to disinfectant not only himself but also to antibiotics. The researchers found that adding increasing quantities of disinfectant in cultures of Pseudomonas aeruginosa, the bacteria adapted to survive not only the disinfectant but also to ciprofloxacin, an antibiotic commonly prescribed, although the bacteria did had not been exposed. The bacterium has adapted and is able to expel from his cell on the antibiotic and disinfectant. His DNA has undergone a mutation allowing it to resist specific type of antibiotic Ciprofloxacin.
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Singaporeans reject daily 7 200 tonnes of waste, the equivalent weight of 970 elephants. All this waste is buried on the island of Pulau Semakau and pace things are going, the increase in waste per capita will be such that the island will be overrun by 30 to 40 years. The Director of Environmental Technology Division at the National Environment Agency (PBN) said that the technology involved to recover the waste in place in Singapore is currently dating 30 or 40 years and is obsolete. We urgently need to invest in new technologies, more efficient and less costly.
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Your genes make you a human being … even the genes of your bacteria. Hundreds of species of bacteria share in this moment your life. Welcome to decoding the human genome … tract.
Not only did we needed a great time to really complete the entire human genome (see other) But in addition, that we learn that there would be 100 times more genes to discover among these bacteria that live within us.
An international project bringing together European and Chinese researchers, published last week in Nature Has addressed this intriguing question and disproportionate. On their 124 volunteers, all Europeans, at least 57 species of bacteria are present in everyone, if we make the addition is at least a thousand different species of bacteria that have been identified among these 124 persons.
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An international partnership of scientists has decoded the entire genome of our intestinal bacteria.
The intestinal flora, that is to say all the bacteria that inhabit our digestive tract is complex and essential to our physiology, our nutrition, our immunity and even our development. For example, bacteria synthesize vitamins, break down certain compounds that we can not digest and protect us from other bacterial pathogens. But they remain largely unknown, no team had so far managed to identify them. This has now changed. The international consortium Meta-hit (Meta-genomic of the Human Intestinal Tract), Coordinated by INRA in Jouy-en-Josas, published the meta-genome of the intestinal flora, i.e all the genes of bacteria in the gut.
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Given global warming, scientists are constantly seeking new sources of greenhouse gas emissions – and find them. Researchers at the Institute of Plant and Animal Ecology, which depends on the Russian Academy of Sciences, found that methane is produced due to the decomposition of wood.
In general, the decomposition of wood leads to the generation of carbon dioxide as greenhouse gas emissions. But it was discovered that when the wood is decomposed by fungi, another gas is produced – methane. Researchers have discovered using an infrared analyzer. Methane is present in the timber too, with its concentration is five times higher than that of carbon dioxide.
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The bacteria often have bad press, such as those living in the water, which are often linked to disease. But researchers at the University of Nottingham are using these tiny organisms and the latest membrane filtration techniques to improve and refine the purification of contaminated water.
These single-celled organisms eat the contaminants present in water through a process called “Bioregeneraci
on” (in English
bioremediation), Which is used for treatment of industrial and human consumption.
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