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Tag: "exist" at biology news

Solution to bacterial mystery promises new drugs

...during the first step in making membranes does not exist in most other bacteria, including gram-positive pathogens. Therefore, the way gram-positive bacteria make phospholipid building blocks remained a mystery for over more than two decades. Now, however, the St. Jude team reports that the gram-positive p...

Seagrass ecosystems at a 'global crisis'

...que group of flowering plants that have adapted to exist fully submersed in the sea ?profoundly influence the physical, chemical and biological environments of coastal waters. They provide critical habitat for aquatic life, alter water flow and can help mitigate the impact of nutrient and sediment polluti...

Global changes alter the timing of plant growth, scientists say

... within the range that climate experts predict may exist 100 years from now--a doubling of atmospheric carbon dioxide; a temperature rise of 2 degrees Fahrenheit; a 50 percent increase in precipitation; and increased nitrogen deposition--as a likely byproduct of fossil-fuel burning. Scientists applied ea...

'Failed' experiment yields a biocontrol agent that doesn't trigger antibiotic resistance

...rk," he explains. "We can build things that don't exist in nature. It's a versatile concept that doesn't apply to just one antimicrobial agent." Filutowicz and Burgess, wine enthusiasts who are as comfortable fermenting grapes as they are transforming bacterial plasmids, partnered with students from th...

Life in the extreme

...cientifically challenging environments for life to exist on the planet. Extensive fields of hydrocarbon-r.... But life in these alien environments can also exist without symbionts as Ian MacDonald from Texas A&M University, Corpus Christi US has demonstrated...

Molecules in blood foretell development of preeclampsia

...they circulate in the bloodstream. Both molecules exist in a non-soluble form, attached to the surface of cells lining blood vessels. In this non-soluble form, they are classified as receptors because they serve as targets for other molecules. When molecules attach, or bind, to the receptors, the bindin...

BC catalyst discovery promises faster, cheaper drug production

... molecules. Many important chemical compounds that exist in nature or are created by laboratory scientists come in two, mirror-image forms ?a "left" and a "right" hand. Some drugs comprise chiral molecules, which can pose a problem: often, one hand, or enantiomer, of the drug molecule can be beneficial to ...

Transmission of antibiotic-resistant bacteria linked to previous intensive care unit room occupants

...g bacterial spread. "Although high-risk rooms may exist because of difficult-to-clean design or poor placement of hand hygiene equipment, transmission may be more directly linked to a prior occupant who harbors a resistant organism rather than to a particular room," the authors write. Susan S. Huang, M...

Ocean seep mollusks may share evolutionary history with other deep-sea creatures

...s, but similar chemically challenging environments exist at hydrothermal vents, fissures in the ocean floor where water is superheated by magma lurking just below the crust. Although seep and vent fluids are a poisonous brew for most species, animals such as giant tube worms and the mollusks studied by Ki...

Sports cheats beware -- new test detects previously undetectable drug

... other than medical treatment is banned, and tests exist that can detect injected hormones. Injecting synacthen, which stimulates the body to produce extra amounts of its own corticosteroid hormones is also banned. But until now there has been no test that could detect it in a blood sample. That has just ...

From hot springs to rice farms, scientists reveal new insights into the secret lives of archaea

...d ammonia oxidation was previously thought only to exist in the bacterial realm,'' Francis said. ''Nobody ever guessed that members of the Archaea were also involved in this process. We're still figuring out how all the pieces fit together.'' ...

Proteins may behave differently in natural environments

...en in an environment similar to that in which they exist naturally, proteins and multiprotein assemblies may demonstrate actions or dynamics different than those they exhibit when in the static form in which they are most often studied, said researchers at Baylor College of Medicine in a report in the curr...

LSU professor discovers new species

...e have. It is imperative that we know what species exist in order to preserve them for future generations," said Austin. He used the cutting-edge molecular genetics lab at the LSUMNS to decipher the genetic code of the lizards. "We sequenced the DNA of this new species and several other closely related ...

Scientists find new way to manipulate DNA

...-M team discovered that flow turbulence did indeed exist and that it was impacting the polymer quite a bit. Through experiments that accounted for turbulent flow, Solomon and co-authors Steven Ceccio, with appointments in the Department of Mechanical Engineering and Naval Architecture and Marine Engineerin...

Does missing gene point to nocturnal existence for early mammals?

...found in the other classes of vertebrates does not exist in mammals." It is not yet clear how the functions of the two melanopsins differ but having different cone genes or 'opsins' allows vertebrates to detect different wavelengths of light and allows them to see colour. The Manchester team now hope...

Researchers create genetically matched embryonic stem cells for transplantation

... technique is only applicable to females. (Methods exist for deriving embryonic stem cells using sperm from men, but these techniques are as technically challenging and inefficient as somatic cell nuclear transfer, Daley says.) There are also potential safety concerns. Embryonic stem cells created throug...

New mechanism underlying pain found

...c transmission." Ion channels are openings that exist within a cell that allow the passage of certain io...d that hundreds of different types of ion channels exist in the body, each with a distinct responsibility for sending a specific message, and that specific p...

Cellular traffic backups implicated in skeletal malformations

...r unidentified mechanism for protein transport may exist in the other cell types. "We had expected mutations in proteins like collagen or accessory matrix proteins to cause craniofacial malformations. Realistically, nobody suspected that these so-called 'housekeeping genes' are responsible for that sort...

Molecular mechanism provides intra-cellular traffic signal

...anism that her lab identified must now be shown to exist in mammalian cells. Her earlier discovery of the Ypt molecular switches in yeast and the subsequent finding of their homologues in mammalian cells, together with the fact that TRAPP is conserved in evolution from yeast to man, lead her to believe the...

Gene therapy for hereditary lung disease advances

...ssociated virus; about 200 variations of the virus exist in nature. "We have another version of the virus that appears in animal studies to be close to a thousandfold more potent at making protein," Flotte said. "That's very encouraging to us. So the next trial, which has already begun, is to use the ne...

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