5,616 results
5,616 results for: Bacteria
- Chemistry
Expanding the genetic code
In an effort to explore the mechanisms of evolution, researchers have designed an unnatural chemical base and inserted it into synthetic DNA in a test tube.
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Human immune signal sets off bacterial attack
A chemical secreted by immune cells when people are stressed or sick causes a common gut bacterium to go on the offensive against its host.
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Maybe there was a belch of hydrogen sulfide involved in the Permian extinctions. However, did it leave some geological trace, as did the vast Siberian outpourings of magma, both on land and in the sea, over the course of a million years during the period? Stan SkirvinScottsdale, Ariz. The ocean venting proposed by Lee Kump’s […]
- Tech
Artificial Animalcules
Advances that include the first swimming micromachine and novel designs for similar devices are deepening scientists' understanding of the bizarre world of microscale liquids.
- Health & Medicine
The Case of the Suspicious Hamsters
A recent outbreak of Salmonella poisoning showed that hamsters, mice, and other pocket pets can spread the dangerous bacteria, which are typically associated with chickens and eggs.
- Chemistry
Bacteria send out molecular scrounger for copper
Scientists have discovered the organic molecule that bacteria use to take up copper, which the microbes then use to chemically crack methane.
- Chemistry
Cactus goo purifies water
Scientists are working on an environmentally benign water-filtering process that uses the nopal cactus.
- Health & Medicine
The Beef about UTIs
Antibiotic-resistant infections that affect some women may have been contracted from infected meat.
- Health & Medicine
Phage Attack: Antibacterial virus might suppress cholera
Bacteria-attacking viruses that infect bacteria hold cholera bacteria in check throughout most of the year except during the rainy season when these viruses become diluted.
- Earth
Life thrived below solid ice shelf
A survey of a segment of Antarctic seafloor that until recently had laid beneath a thick, floating ice shelf for thousands of years has revealed an ecosystem apparently based on chemical nourishment, not sunshine.
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Staph bacteria are choosy about their iron source
Staphylococcus bacteria prefer to get their iron from heme, the ring-shaped portion of oxygen-carrying proteins such as hemoglobin.
- Earth
Joining the Resistance: Drug-immune microbes waft over hogs
Many bacteria found floating within a farm building are invulnerable to multiple antibiotics, confirming that airborne dispersal could spread drug-resistant microbes from animals to people.
