5,617 results
5,617 results for: Bacteria
- Earth
Oxygen Rocks: Volcanoes spurred early atmospheric change
Earth owes its oxygen-rich atmosphere to a change in volcanic activity about 2.5 billion years ago.
- Earth
Dead Serious
Little progress has been made this decade in reducing the size of the Gulf of Mexico's dead zone, a massive area of oxygen-depleted water caused by agricultural and urban runoff.
- Health & Medicine
Chocolate Constituent Bests Fluoride
The beans used to make chocolate can also render a tooth-decay-fighting extract; unfortunately, it's bitter, not chocolaty.
- Tech
Wheel of Life: Bacteria provide horsepower for tiny motor
Crawling bacteria can power a micromotor.
- Chemistry
Switch Hitters: Antibacterial compounds target new mechanism to kill microbes
Recently discovered ribonucleic acid segments, called riboswitches, may become prime targets for new antibacterial drugs.
- Health & Medicine
Dangerous History
The genome of the TB bacterium has small but significant pockets of diversity, giving scientists new targets for preventing and treating the disease.
- Science & Society
From the March 20, 1937, issue
The real Groundhog Day, microfilm book storage, and turning farm waste into chemical products.
- Health & Medicine
Vaccine Harvest: Cholera fighter could be easy to swallow
An edible vaccine, made by genetically engineering rice, safeguards mice against the toxin produced by cholera bacteria.
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All in the Family
Contrary to popular belief, species of salamanders, birds, beetles and fish prefer to mate with close kin.
- Health & Medicine
Milk Therapy
Breast milk has long been known to be the best food for babies, but compounds in breast milk promise to be a tonic for many adult ills as well.
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Role Change: Mast cells show an anti-inflammatory side
Cells that cause inflammation in allergic skin reactions to poison ivy also produce a protein that subdues the reaction a few days later.
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Cooked garlic still kills bacteria
Cooked garlic can kill bacteria, but less efficiently than raw garlic does.
