Articles with the keyword: 
Microbes drove Earth's mineral evolution
sea-maid submitted, created time 3 days 8 hours (www.nature.com)
A comprehensive history of Earth's mineral wealth concludes that without life, many raw materials wouldn't exist. In the early interstellar medium, scientists say, there were about twelve minerals. The planetary formation process upped this to around sixty. The addition of water (itself a mineral) allows for more different kinds of reactions and the mineral count jumps into the hundreds 
Worlds within worlds: evolution of the vertebrate gut microbiota
sea-maid submitted, created time 1 month 4 weeks (www.nature.com)
This article is a writeup of an analysis of published 16S ribosomal RNA gene sequences to compare the bacterial assemblages that are associated with humans and other mammals, metazoa and free-living microbial communities that span a range of environments. The composition of the vertebrate gut microbiota is influenced by diet, host morphology and phylogeny, and in this respect the human gut bacterial community is typical of an omnivorous primate. However, the vertebrate gut microbiota is different from free-living communities that are not associated with animal body habitats
Microbes beneath sea floor genetically distinct
sea-maid submitted, created time 3 months 4 weeks (esciencenews.com)
Tiny microbes beneath the sea floor, distinct from life on the Earth's surface, may account for one-tenth of the Earth's living biomass, according to an interdisciplinary team of researchers, but many of these minute creatures are living on a geologic...
kavin submitted, created time 5 months 2 weeks (www.sciencenews.org)
The neurotoxic effects of headgear laced with mercury had been recognized anecdotally for years. In the research, Cupriavidus metallidurans, a microbe that flourishes on metal and is not dangerous to humans has been found. It has a set of proteins that turns mercury into a form that evaporates into the air.
Abundance and diversity of microbial life in ocean crust
kavin submitted, created time 5 months 2 weeks (www.ncbi.nlm.nih.gov)
Here, using quantitative polymerase chain reaction, in situ hybridization and microscopy, the authors demonstrate that prokaryotic cell abundances on seafloor-exposed basalts are 3-4 orders of magnitude greater than in overlying deep sea water. They hypothesize that alteration reactions fuel chemolithoautotrophic microorganisms, which constitute a trophic base of the basalt habitat, with important implications for deep-sea carbon cycling and chemical exchange between basalt and sea water.
Darkfrog submitted, created time 5 months 2 weeks (sciencenow.sciencemag.org)
This article actually ties microbiology together with space travel rather neatly.
The Mars Phoenix lander was shipped off to the icy polar regions for one primary purpose (though I'm sure the NASA guys can come up with more now that it's there): search for liquid water and, importantly, microbial ilfe on Mars. That last possibility is looking less and less likely. Mars is showing high levels of salt, too high for known microbial life. Estimates put Mars' water at ten to a hundred times saltier than Earth's oceans. NASA has not given up hope yet
Organism Sets Record for Extreme Living Conditions
kavin submitted, created time 5 months 3 weeks (www.sciam.com)
It’s hot to research life in extreme environments. There are organisms that thrive in boiling hot thermal vents and in toxic stews. These extremophiles might show how life could arise on other planets. Or they may provide info that helps solve environmental crises. Based on the genetic analysis, it appears to be a type of archaea—a single-celled organism similar to but distinct from bacteria.
Vincent submitted, created time 8 months 4 days (sciencenow.sciencemag.org)
Talk about a low-down, dirty trick. New research reveals that bacteria deploy duplicates of human proteins to jam our body's early warning system. The results might lead to improved treatments for bacterial infections and for diseases such as arthritis that are caused by an overactive immune system.
Microbial community gene expression in ocean surface waters
davidd submitted, created time 8 months 1 week (www.pnas.org)
Metagenomics is expanding our knowledge of the gene content, functional significance, and genetic variability in natural microbial communities. Still, there exists limited information concerning the regulation and dynamics of genes in the environment. They report here global analysis of expressed genes in a naturally occurring microbial community. They first adapted RNA amplification technologies to produce large amounts of cDNA from small quantities of total microbial community RNA.
Sue Wu submitted, created time 8 months 2 weeks (www.sciam.com)
Scientists discover microbes in snows sampled from different parts of the world--and show how microorganisms might be the catalyst.
"Rain-making" bacteria found around the world
sumsung submitted, created time 8 months 3 weeks (www.nature.com)
The same bacteria that cause frost damage on plants can help clouds to produce rain and snow. Studies on freshly fallen snow suggest that "bio-precipitation" might be much more common than had been suspected.
Deadly Microbes from Outer Space
Sue Wu submitted, created time 9 months 1 week (discovermagazine.com)
For astronauts toiling in the close quarters of the International Space Station or on a shuttle to Mars, an ordinary germ would be risky enough. But a recent experiment published in the Proceedings of the National Academy of Sciences has shown that a microbe can turn even more dangerous in space than on Earth.
The Gold in Yellowstone's Microbes
whitesnow submitted, created time 11 months 3 weeks (www.time.com)
Yellowstone Park's bizarre steam vents and odiferous boiling pools are more than just tourist attractions and geological curiosities. They are home to unique microbes — living organisms that thrive in extreme heat. More than that, they are valuable resources for industries searching for fresh and big profits.
Energy Boost Helps Microbes Make Hydrogen
Eric wu submitted, created time 1 year 5 days (sciencenow.sciencemag.org)
This article is on energy. It describes that microbes can make hydrogen by giving a little energy boost. The process comes out ahead in efficiency. That is because the hydrogen producing in the process contains nearly three times as much energy as added from the external power supply to get the electrons and protons to combine. It gives us a particular way to develop new energy, not only turning biomass to ethanol. So I commend the article.
Microbes can survive 'deep freeze' for 100,000 years
jiangyun submitted, created time 1 year 1 month (space.newscientist.com)
Microbes can survive trapped inside ice crystals, under 3 kilometres of snow, for more than 100,000 years, a new study suggests. The study bolsters the case that life may exist on distant, icy worlds in our own solar system.
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