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Tag: "take" at biology news

Researchers extend mouse lifespan by protecting against free radicals

...t the cellular level. Those reactive chemicals can take part in unnecessary chemical reactions that can damage the cell components, including DNA. Some researchers believe that free radicals could contribute to or hasten heart disease, cancer, and other age-related diseases. The theory also suggests that ...

Researchers discover mechanism for multiplying adult stem cells

...type. It would be ideal if scientists had a way to take a liver adult stem cell and multiply it in a dish without having it form mature liver tissue. This experiment showed that when Oct4 was reactivated, the adult stem cells in those tissues continued to replicate without forming mature tissue. In a mam...

Poaching, logging, and outbreaks of Ebola threaten central African gorillas and chimpanzees

...gram, another author of the action plan. "It will take a tremendous amount of work and dedication from a variety of conservation groups, government agencies and donors, but we still have a chance to save these animals." The Brazzaville meeting was organized by the Centre International de Recherche...

When it comes to cell entry, being average has its advantages

...key role. According to the team's new model, cells take in viruses and other particles with a diameter of 27 to 30 nanometers more readily than ones that are larger or smaller. The faster the viruses are absorbed, the more rapidly they reproduce. "Cells are simply optimizing the system," Freund explained...

Modified collagen could yield important medical applications

...ve shown that this kind of molecular marriage does take place. They attached fluorescent tags to the peptides and observed the glow in collagen that had been mixed with the smaller molecules. Exactly how and why the collagen and the peptides join is uncertain. But researchers know that collagen molecules ...

A whole lot of shaking goin' on triggers early hatching in red-eyed tree frogs

...start to wiggle frantically. As the snake moves to take another morsel, the embryos rupture their egg capsules, drop into the water, and, as tadpoles, swim away to safety -- hatching one to three days earlier than they would have if left undisturbed. What cues prompt the embryos to hatch early when shake...

ORNL, UC Berkeley unravel real-world clues to Earth's mysteries

...this collaboration, Jill Banfield has been able to take her research up a quantum step by obtaining the first glimpse into the complex proteome dataset of this microbial community," Hettich said. "To do this, it was critical that we bring together researchers with expertise in biology and ecology of micro...

Unusual antibiotics show promise against deadly 'superbugs'

...ve shown that this kind of molecular marriage does take place. They attached fluorescent tags to the peptides and observed the glow in collagen that had been mixed with the smaller molecules. Exactly how and why the collagen and the peptides join is uncertain. But researchers know that collagen molecules ...

Achilles heel of the herpes virus possibly found

...other viruses so far, HSV seems to have evolved to take advantage of a broadly present cellular protein that has properties like that of known cellular fusion machinery," says Fuller. "No other virus has been shown to use a cellular fusion protein for entry into cells." She explains that the search for t...

Scripps research scientists solve structure of a critical innate immune system protein

... TLRs work, the structure may also help scientists take steps toward improving human health, since TLRs are implicated in a number of diseases and, hence, constitute potential therapeutic targets. Innate Immunity and Toll-Like Receptors Humans, like all other organisms, are constantly challenged in a wo...

Researchers Discover That Microbes Can Produce Miniature Electrical Wires

...li it was unknown how this electron transfer might take place. The conductive pili that Geobacter produces may have a variety of applications for the electronics industry. Ultrafine wires, often referred to as nanowires, are required for further miniaturization of electronic devices. Manufacturing nanowi...

Bees, Brains and Addiction

...s the sugar reward and signaling to the muscles to take the appropriate action to receive the reward. Computer models of how a bee assimilates and responds to information about a reward can be then applied to studies of how humans make decisions about rewards. And predictions from computer modeling of th...

New tool reveals secrets of migrating cells

..., a developmental immunologist. "In the past, we'd take organs out, smush them up and basically do biochemistry in test tubes, or watch their behavior in a single layer of cells. It's an imaging revolution to be able to go into the native environment while keeping the intact organ alive and make movies of...

Environmental chemical cocktail may sabotage sperm

...m reaches the egg, then fertilisation is unable to take place because the sperm has lost special "docking" molecules that allow it to bind to the egg. Prof Fraser said: "Human sperm proved to be even more responsive than mouse sperm to genistein. These compounds are classified as environmental oestrogens...

Decisions, decisions: Male or female?

...heir own which to become, however, germ cells must take "advice" from other cells within embryos as to which is the appropriate sex. The Johns Hopkins researchers have found that this advice is delivered by a sequence of chemical reactions called the "JAK/STAT" pathway. ("JAK/STAT" is an acronym for "Janu...

Drug Offers Alternative to Surgical Treatment After Miscarriage

...he risk of stomach ulcers that occur in people who take certain pain relievers for arthritis. Misoprostol ...nt. Such expulsion is by no means certain, and may take more than a month. Many women, grieving from the failed pregnancy, may prefer not to wait. Occasiona...

Could better mangrove habitats have spared lives in the 2004 tsunami?

...Mangrove fringes near the water's edge appeared to take most of the energy from the tsunami waves, and they showed evidence of damage in some cases, but the researchers found few examples of mangrove trees actually being uprooted. However, mangroves at numerous sites had experienced pre-tsunami degradati...

Sleeping Sickness Epidemic Spreading in Uganda

...he risk of stomach ulcers that occur in people who take certain pain relievers for arthritis. Misoprostol ...nt. Such expulsion is by no means certain, and may take more than a month. Many women, grieving from the failed pregnancy, may prefer not to wait. Occasiona...

Stem Cells to Solve the Blood Shortage Problem?

...Mangrove fringes near the water's edge appeared to take most of the energy from the tsunami waves, and they showed evidence of damage in some cases, but the researchers found few examples of mangrove trees actually being uprooted. However, mangroves at numerous sites had experienced pre-tsunami degradati...

Neandertal femur suggests competition with hyenas and a shift in landscape use

...nges and major improvements in adaptation began to take shape with modern humans," said Erik Trinkaus, Ph.D., Mary Tileston Hemenway Professor of Anthropology at Washington University and co-author of the paper. "One of the changes that has been documented with the transition from Neandertals to modern h...

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